San Leandro Climate & Monthly Temperature Overview – United States

Summer in San Leandro

Summer in San Leandro is warm and dry, with average temperatures ranging from the mid-70s to the low 90s Fahrenheit. The city experiences little rainfall during this time of year, making it an ideal time to enjoy outdoor activities. The clear skies and abundant sunshine provide ample opportunities for hiking, biking, and picnicking in the nearby hills and parks. However, occasional heat waves can reach triple digits, so it is important to stay hydrated and take precautions to avoid heat-related illnesses.

Winter in San Leandro

Winters in San Leandro are mild and wet, with average temperatures ranging from the mid-40s to the low 60s Fahrenheit. The city receives an average of 20 inches of rainfall annually, most of which occurs between November and April. While snow is rare, cold spells can bring frost and occasional freezing temperatures. The winter months offer a chance to enjoy cozy indoor activities such as visiting the San Leandro Library or the Bay Area Discovery Museum. Additionally, the nearby Livermore Valley Wine Country offers numerous wine tastings and tours, providing a delightful way to escape the winter chill.

Monthly Temperature Averages

San Leandro, located in California, United States, experiences moderate temperatures throughout the year. The warmest months are July and August, with average high temperatures ranging from 78-80°F (26-27°C). The coldest months are December and January, with average low temperatures dropping to 37-39°F (3-4°C).

Spring and fall in San Leandro are characterized by mild temperatures. In April and May, the average high temperature is 68-70°F (20-21°C), while in September and October, it ranges from 73-75°F (23-24°C). The nighttime temperatures during these seasons typically fall between 45-50°F (7-10°C).

Cloud Coverage and Types in San Leandro

San Leandro, located in the San Francisco Bay Area of California, typically experiences a moderate level of cloud cover throughout the year. The city’s proximity to the Pacific Ocean influences its cloud patterns, with onshore breezes often bringing in marine-influenced clouds. During the summer months, high-pressure systems often dominate the region, resulting in clearer skies and less cloud cover. However, in the winter, low-pressure systems and storm tracks frequently bring in clouds and precipitation, leading to increased cloud cover.

The types of clouds commonly observed in San Leandro include stratus, stratocumulus, and altocumulus. Stratus clouds are flat and featureless, often covering the entire sky and blocking out the sun. Stratocumulus clouds are similar to stratus but appear in patches or layers, leaving some areas of the sky visible. Altocumulus clouds are higher in the atmosphere and consist of puffy white or gray masses. Other cloud types, such as cirrus and cumulus, may also be visible at times, depending on weather conditions.

Seasonal Precipitation Patterns

San Leandro experiences a Mediterranean climate, characterized by wet winters and dry summers. Precipitation primarily occurs between October and April, with an average annual rainfall of around 23 inches. The wettest months are December and January, which receive about 3-4 inches of precipitation on average. During the summer months, precipitation is scarce, and the region often experiences prolonged periods of drought.

Precipitation Trends

Over the past several decades, there has been a slight increase in precipitation in San Leandro. This is partly attributed to climate change, which is leading to more frequent and intense storms. In recent years, the region has experienced several extreme precipitation events, including heavy rainfall and flooding. These events have caused significant damage to property and infrastructure and underscore the importance of preparedness and adaptation measures.

Impacts of Precipitation

Precipitation plays a vital role in San Leandro’s ecosystem and economy. The winter rains recharge groundwater aquifers, providing water for drinking, agriculture, and industry. The precipitation also supports a diverse range of plant and animal life, including native ecosystems and urban green spaces. However, excessive precipitation can lead to flooding, erosion, and other hazards that can have negative impacts on the community.

Rainfall Patterns and Variability

San Leandro, located in the San Francisco Bay Area, experiences a Mediterranean climate characterized by wet winters and dry summers. The average annual rainfall is approximately 24 inches (610 mm), with the majority occurring between October and March. During these months, frequent storms bring moderate to heavy rain, occasionally accompanied by thunderstorms. The wettest month is typically January, receiving an average of 3.6 inches (91 mm) of precipitation.

Conversely, the summer months are extremely dry, with little to no rainfall. From June to September, the average monthly precipitation is less than 0.2 inches (5 mm). This season is characterized by clear skies, warm temperatures, and a persistent lack of moisture. The dry spell lasts an average of five months, from May to September, and can sometimes extend into October.

Climate and Snowfall Patterns

San Leandro, California, experiences a Mediterranean climate characterized by mild, dry summers and cool, wet winters. Snowfall is a rare occurrence in the city, with an average of only 0.1 inches per year. This is due to the city’s proximity to the Pacific Ocean, which moderates temperatures and prevents significant snowfall. The last time San Leandro received measurable snowfall was in February 1976, when 1.5 inches accumulated.

Impacts and History

Historically, snowfall in San Leandro has had minimal impact on the city. However, on rare occasions when snow does fall, it can cause traffic disruptions, school closures, and power outages. Additionally, the sudden change in temperature from above freezing to below freezing can be harmful to plants and water pipes. Despite the infrequency of snowfall, the city maintains snow removal equipment in case of unexpected events.

Current Conditions

The current weather conditions in San Leandro, United States, indicate a bright and sunny day. The sun is shining brightly, casting a warm glow over the city. The temperature is a comfortable 72 degrees Fahrenheit, with a light breeze blowing from the west. Humidity levels are relatively low, making for a pleasant outdoor experience. The sun is expected to remain visible for the majority of the day, with only a few passing clouds in the forecast.

Forecast

The forecast for the next few days in San Leandro, United States, predicts continued sunny weather. Temperatures are expected to remain in the mid to upper 70s, with clear skies and light breezes. Humidity levels will remain low, creating ideal conditions for outdoor activities. The sun is anticipated to stay prominent in the sky, with minimal cloud cover expected. Overall, the upcoming days promise excellent weather for those looking to enjoy the outdoors or simply soak up the sun’s rays.

Moonrise and Moonset Times

The timing of moonrise and moonset in San Leandro, California varies throughout the year due to the Earth’s changing orientation relative to the Sun and the Moon. During the spring and fall, when the days and nights are roughly equal, moonrise and moonset occur approximately 12 hours apart. In the summer, as the days lengthen, moonrise is delayed and moonset is earlier. Conversely, during the winter, when the days are shorter, moonrise is earlier and moonset is later.

To determine the exact times of moonrise and moonset for a specific day, you can consult an almanac or use an online astronomy calculator. The following are approximate moonrise and moonset times for different months in San Leandro:

  • January: Moonrise: 6:00 AM – 7:00 AM, Moonset: 7:00 PM – 8:00 PM
  • April: Moonrise: 4:00 AM – 5:00 AM, Moonset: 10:00 PM – 11:00 PM
  • July: Moonrise: 2:00 AM – 3:00 AM, Moonset: 12:00 AM – 1:00 AM
  • October: Moonrise: 6:00 AM – 7:00 AM, Moonset: 10:00 PM – 11:00 PM

Moon Phases

The Moon goes through a cycle of phases as it orbits the Earth. The four main phases are:

  • New Moon: The Moon is not visible from Earth because it is between Earth and the Sun.
  • Waxing Crescent: The Moon is partially visible as a thin crescent shape.
  • First Quarter: Half of the Moon is visible.
  • Waxing Gibbous: More than half of the Moon is visible as a gibbous shape.
  • Full Moon: The entire Moon is visible.
  • Waning Gibbous: More than half of the Moon is visible as a gibbous shape.
  • Third Quarter: Half of the Moon is visible.
  • Waning Crescent: The Moon is partially visible as a thin crescent shape.

The duration of each phase is approximately 7 days. In San Leandro, the timing of the phases varies throughout the year. For more precise information, please consult an almanac or online source.

Seasonal Variation of Humidity in San Leandro

The humidity levels in San Leandro vary throughout the year, largely influenced by the region’s Mediterranean climate. Summer months, typically spanning from June to August, experience markedly lower humidity levels, often falling below 50%. This dryness is attributed to the influence of coastal fog, which disperses as the day progresses, leaving behind clear skies and warm temperatures. In contrast, winter months, particularly December through February, tend to exhibit higher humidity, often exceeding 70%. This increased moisture in the air is a result of frequent precipitation, including rainfall and fog, which contribute to a damp and cool climate during this period.

Impact of Humidity on Daily Life

The fluctuating humidity levels in San Leandro have a noticeable impact on daily life. During the dry summer months, the low humidity can lead to dry skin and chapped lips, necessitating the use of moisturizers and lip balms. Additionally, the dry air can affect respiratory health, potentially causing irritation and discomfort for those with sensitive conditions. On the other hand, the high humidity during winter months can create a sense of mugginess and discomfort, particularly during physical activities. The increased moisture in the air can also contribute to mold and mildew growth in homes and buildings, requiring careful ventilation and moisture control to prevent respiratory issues and property damage.

Wind Patterns

San Leandro experiences a varied wind pattern throughout the year. During the summer months, prevailing winds blow from the northwest, bringing cool, moist air from the Pacific Ocean. These winds typically reach speeds of 10-15 mph and provide welcome relief from the warm summer temperatures. In the winter, winds shift to the south and southwest, originating from the Bay Area inland. These winds are generally warmer and drier, often bringing with them dust and smoke from neighboring regions. Wind speeds during winter can be more variable, ranging from 5-20 mph.

Wind Speed and Direction

The average wind speed in San Leandro is relatively moderate, ranging from 8-11 mph throughout the year. Wind direction is primarily influenced by the topography of the area. The city is located in a valley surrounded by the San Leandro Hills to the east and the East Bay hills to the west. As a result, winds are often channeled through these valleys, creating a somewhat predictable pattern. During the summer, prevailing winds blow from the northwest, while in the winter, winds shift to the south and southwest.

Year-Round Enchantments

San Leandro boasts a Mediterranean climate, promising a temperate and generally pleasant experience year-round. The city’s average temperature ranges from mid-40s Fahrenheit (7-8°C) in the coldest months to mid-70s Fahrenheit (23-24°C) in the warmest. While the city enjoys ample sunshine throughout the year, it experiences a brief rainy season that typically runs from November to April. During this time, expect rain showers alternating with clear skies. However, the rain adds to the city’s charm, creating lush greenery and vibrant blooms.

Seasonal Highlights

For those seeking warm, dry weather, the best time to visit San Leandro is during the summer months from June to September. Temperatures soar into the low 80s Fahrenheit (27-28°C), providing the perfect conditions for outdoor adventures or simply relaxing by the water. The city also hosts several events and festivals during this time, including the annual San Leandro Farmers’ Market and the San Leandro Art Walk.

Shoulder Season Charm

Spring and fall offer a unique blend of moderate temperatures and fewer crowds. With temperatures hovering between the mid-50s and mid-70s Fahrenheit (13-24°C), these seasons offer opportunities for hiking, biking, and exploring the city’s parks and trails. The vibrant fall foliage transforms the landscape into a breathtaking spectacle, while the mild spring weather invites visitors to enjoy the city’s outdoor attractions without the summer crowds.

Solar Power Potential:

San Leandro, located in the sunny state of California, boasts a favorable solar resource. Its low latitude and abundant sunshine make it an ideal location for harnessing solar energy. The city has an average of 250-300 sunny days per year, with an average daily solar radiation of around 5.5 kilowatt-hours per square meter. This high irradiance provides ample opportunity for generating solar electricity. Additionally, the city’s relatively mild climate with limited extreme weather events reduces potential interruptions to solar power generation.

Solar Adoption and Incentives:

San Leandro has made a concerted effort to promote solar energy adoption within the community. The city offers incentives such as property tax exemptions and rebates for installing solar systems. These incentives have encouraged homeowners and businesses to switch to clean, renewable energy sources. San Leandro also hosts a number of educational programs and events to raise awareness about the benefits of solar power and assist residents in making informed decisions about installing solar panels. As a result, the city has experienced a steady increase in the number of solar installations in recent years.

Elevation and Slopes

San Leandro’s topography is characterized by a gentle overall elevation rise from the San Francisco Bay shoreline eastward towards the San Leandro Hills. The city’s lowest elevations are found along the bay, with some areas below sea level. As one moves inland, the elevation gradually increases, reaching approximately 150 feet (46 m) near the Hayward Fault. The San Leandro Hills, on the eastern edge of the city, have elevations ranging from 500 to 1,300 feet (152 to 396 m) above sea level. The terrain in these hills is generally hilly and rugged, with steep slopes and narrow valleys.

Notable Geographic Features

The most prominent geographic feature in San Leandro is the San Leandro Hills Regional Preserve. This 1,780-acre preserve encompasses the eastern foothills of the city and provides opportunities for hiking, biking, and horseback riding. The preserve is home to a variety of plant and animal life, including oak woodlands, chaparral, and grasslands. Mount Tennyson, the highest point in the preserve, offers panoramic views of the San Francisco Bay Area. Another notable geographic feature in San Leandro is the Estudillo Canal. This historic canal was built in the 1850s to transport water from Alameda Creek to the San Leandro Valley. Today, the canal is a popular spot for recreational boating and kayaking.

Oakland International Airport (OAK)

Oakland International Airport (OAK), situated approximately 8 miles from San Leandro, is the closest major airport. It offers a wide range of domestic and international flights, connecting San Leandro to major cities across the United States and abroad. OAK is easily accessible via Interstate 880 and Highway 17, making it a convenient option for travelers. The airport features modern facilities, including a variety of restaurants, shops, and amenities to enhance the passenger experience.

San Francisco International Airport (SFO)

While slightly further away at a distance of about 14 miles, San Francisco International Airport (SFO) is another notable option for air travel to and from San Leandro. SFO boasts an extensive network of domestic and international flights, offering connections to a broader range of destinations compared to OAK. However, it is important to consider the additional travel time required to reach SFO from San Leandro. The airport offers convenient access to public transportation, including the BART (Bay Area Rapid Transit) system, which provides a direct connection to San Francisco and its surrounding areas.

History and Development

San Leandro, located in Alameda County, California, has a rich history that spans over 150 years. Originally inhabited by the Ohlone people, the city was established in 1852 during the California Gold Rush. The name “San Leandro” honors Saint Leander, the patron saint of Seville, Spain. San Leandro experienced significant growth in the early 20th century as a major industrial center and a hub for shipbuilding and manufacturing. Today, the city is known for its diverse population, thriving business community, and numerous cultural attractions.

Demographics and Economy

San Leandro is a vibrant city with a population of approximately 85,000 residents. The population is diverse, with a significant percentage of Hispanic, Asian, and African American residents. The city’s economy is strong, with a focus on healthcare, education, and professional services. Major employers include Kaiser Permanente, Eden Medical Center, and the San Leandro Unified School District. San Leandro is also home to the San Leandro BART station, providing convenient transportation to the Bay Area’s major cities and employment centers. The city boasts a thriving commercial district on East 14th Street, featuring a mix of local businesses, restaurants, and retail stores.