Davis Climate & Monthly Temperature Overview – United States

Spring/Fall (March-May, September-November):

Davis experiences pleasant spring and fall seasons characterized by mild temperatures and occasional rainfall. In March, average temperatures range from 45°F to 64°F, with precipitation averaging around 2 inches. As spring progresses, temperatures rise, with April and May seeing highs in the low to mid-70s and lows in the mid-40s to low 50s. Rainfall decreases to around 1 inch per month. Similar conditions prevail in the fall months, with average temperatures ranging from the low 50s to low 70s. Precipitation increases slightly in October and November, reaching around 2 inches per month.

Summer (June-August):

Summer in Davis is typically hot and dry. Temperatures soar to an average high of 93°F in July and August, with lows dipping to around 60°F. The humidity is generally low, which can make the heat more bearable. Precipitation is rare during this time, with less than 0.5 inches of rainfall expected in each summer month. Due to the lack of moisture, the vegetation becomes brown and dry, giving the landscape a parched appearance. However, summer evenings can be delightful, with temperatures cooling to the mid-60s or low 70s.

Average Temperature in Davis, United States: Annual Pattern

Davis, California experiences warm and dry summers with mild to cool and wet winters, typical of the Mediterranean climate zone. The average annual temperature hovers around 60°F (15.6°C), with significant variations throughout the year. January, the coldest month, averages around 45°F (7.2°C), while July, the warmest month, boasts an average temperature of 78°F (25.6°C). March through May and September through November are generally pleasant, with average temperatures ranging from 55°F to 65°F (12.8°C to 18.3°C).

Average Temperature in Davis, United States: Precipitation and Humidity

Precipitation in Davis is highly seasonal, with most rain falling between November and April. The average annual precipitation is approximately 21 inches (53.3 centimeters). Summers are typically hot and dry, with little rainfall. Humidity levels vary throughout the year, with higher humidity during the cooler months and lower humidity during the warmer months. On average, humidity levels range from 60% in the mornings to 40% in the afternoons. During the summer, it can drop as low as 20% in the afternoons, contributing to the region’s arid conditions.

Cloud Types

Davis, located in Northern California, experiences a diverse range of cloud formations due to its Mediterranean climate. During the dry season, from May to October, clear skies prevail, while the winter months bring an increase in cloud cover. Common cloud types include cumulus, stratus, and cirrus. Cumulus clouds, characterized by their puffy, cotton-ball appearance, are often seen during fair weather and can grow vertically into towering cumulonimbus clouds that produce thunderstorms. Stratus clouds, on the other hand, are low-lying, gray sheets that cover the entire sky and can lead to drizzle or light rain. Cirrus clouds, the highest and wispiest of the three, are composed of ice crystals and appear as thin, white streaks or tufts.

Cloud Cover

The amount of cloud cover in Davis varies throughout the year, with the driest months experiencing the least cloudiness. On average, Davis receives around 250 clear or partly cloudy days per year. During the winter months, cloud cover increases significantly, with overcast skies occurring about 30% of the time. This increase in cloudiness is due to the influence of the Pacific jet stream and storms that bring moisture from the ocean. In December and January, cloud cover is at its peak, with an average of only 6-7 clear days per month.

Average Precipitation

Davis, United States, experiences an average yearly precipitation of 22.87 inches (581 mm). This precipitation is distributed relatively evenly throughout the year, with the wettest months being January and February, when an average of 4.2 inches (107 mm) of precipitation falls. The driest months are June and July, when an average of only 0.04 inches (1 mm) of precipitation falls.

Variability in Precipitation

The amount of precipitation in Davis can vary significantly from year to year. In some years, the total precipitation may be less than 10 inches (254 mm), while in other years it may exceed 40 inches (1016 mm). This variability is primarily due to the influence of the El Niño-Southern Oscillation (ENSO) phenomenon. During El Niño years, Davis tends to experience more precipitation than average, while during La Niña years, it tends to experience less precipitation than average.

Historical Rainfall Patterns

Davis, California, has a Mediterranean climate, characterized by dry, hot summers and mild, rainy winters. According to historical data, Davis receives an average of 18.7 inches (475 mm) of rainfall annually. The majority of this rainfall occurs between October and April, with November and December being the wettest months. Summers are typically dry, with average monthly rainfall below 0.5 inches (13 mm).

Rainfall Variability and Trends

Over the past century, Davis has experienced considerable variability in rainfall patterns. Some years have been exceptionally wet, with annual rainfall exceeding 30 inches (762 mm). Others have been extremely dry, with less than 10 inches (254 mm) of rain. Recent trends suggest that Davis may be experiencing a shift towards a drier climate. The average annual rainfall has decreased slightly over the past few decades, and the frequency of extreme rainfall events has declined. This trend is consistent with global climate models, which predict that many Mediterranean regions will become drier in the future.

Snowfall in Davis, United States

Davis, located in California’s Central Valley, experiences a Mediterranean climate characterized by hot, dry summers and mild, wet winters. Snowfall is a rare occurrence in Davis due to its proximity to the Pacific Ocean and the moderating influence of the Sierra Nevada mountains. However, on rare occasions, cold fronts from the north Pacific can bring snowfall to the region.

The last recorded snowfall in Davis occurred in February 2019, when a winter storm dumped several inches of snow on the city. Prior to that, the previous snowfall event was in February 2011. These snowfall events were exceptional occurrences and did not result in significant accumulation or disruption. Typically, Davis receives an average of 0.1 inches of snow per year, making snowfall an infrequent and often fleeting phenomenon in the city.

Sunrise and Sunset Times

The timing of sunrise and sunset in Davis varies slightly throughout the year due to the Earth’s orbit around the Sun. During the winter solstice, around December 21st, sunrise occurs at approximately 7:15 AM, while sunset occurs at around 4:45 PM. In contrast, during the summer solstice, around June 21st, sunrise occurs around 5:45 AM, and sunset occurs at approximately 8:15 PM. These times provide an approximate window for daylight hours in Davis.

Average Daily Sunshine

Davis enjoys a considerable number of sunny days throughout the year. The average daily sunshine ranges from approximately 6 hours in December, the least sunny month, to around 10 hours in July, the sunniest month. This abundant sunshine contributes to the city’s overall mild and pleasant weather and makes it an ideal location for outdoor activities, such as biking, hiking, and enjoying the parks.

Visibility and Timing:

In Davis, United States, the moon’s visibility and timing vary throughout the month. The best time to observe the moon is during a full moon, when it appears as a large, bright disk in the night sky. This occurs every 29.5 days. The moon rises and sets approximately 50 minutes later each day, providing ample opportunities for viewing. During the new moon phase, the moon is not visible as it is positioned between the Earth and the Sun.

Phases and Illumination:

The moon goes through a series of phases, each characterized by the amount of its illuminated surface visible from Earth. The new moon is the first phase, when the moon is completely dark and not visible. As the moon orbits the Earth, it begins to receive sunlight, leading to the crescent phase. The waxing gibbous phase follows, during which the moon becomes increasingly fuller until it reaches the full moon phase. After the full moon, the illumination decreases, resulting in the waning gibbous, waning crescent, and finally, the new moon phase again. The time it takes for the moon to complete one full cycle of phases is approximately 29.5 days, known as the lunar cycle.

Seasonal Variations

Davis experiences distinct seasonal variations in its humidity levels. Summers in Davis are generally dry and hot, with relative humidity levels typically ranging from 20% to 40%. This low humidity is attributed to persistent northwesterly winds from the nearby Pacific Ocean, which bring in cool, moisture-laden air that warms and dries as it moves inland. In contrast, winters in Davis are relatively mild and wet, with humidity levels rising to 60% to 70%. The primary source of moisture during this season is the Pacific storm track, which brings in frequent precipitation.

Long-Term Trends

Over the past several decades, Davis has experienced a gradual increase in humidity levels, particularly during the summer months. This trend is believed to be driven by factors such as climate change and urbanization. Rising temperatures have led to higher rates of evaporation from the Pacific Ocean, resulting in an increase in atmospheric moisture. Additionally, the growth of urban areas can create a localized phenomenon known as the urban heat island effect, where higher temperatures and reduced wind speeds contribute to increased humidity.

Seasonal Patterns of Wind Speed and Direction

Davis, located in California’s Sacramento Valley, experiences distinct seasonal patterns in wind speed and direction. During the summer months (June-August), winds are predominantly from the northwest, exhibiting a mean speed of approximately 10 knots. These prevailing northwesterly winds are associated with the coastal sea breeze, which brings cooler air from the Pacific Ocean into the Central Valley. In contrast, winter months (December-February) are characterized by stronger winds from the northeast, with an average speed of around 12 knots. These northeasterly winds are driven by the increased pressure gradient between the Pacific Ocean and the Great Basin, resulting in stronger synoptic-scale airflow.

Local Wind Phenomena

In addition to the large-scale patterns, Davis also experiences localized wind phenomena. The influence of surrounding topography, including the Sierra Nevada mountains to the east and the Coast Ranges to the west, creates unique wind patterns in the city. During the morning hours, katabatic winds (cold, downslope winds) flow from the nearby hills and mountains into the city, resulting in calmer conditions. As the day progresses, the thermal effect of the surface heating induces upslope winds, which transport air from the city and surrounding lowlands to higher elevations. At night, the cooling of the hills and mountains reverses the airflow, leading to the development of downslope winds that flow into Davis from the surrounding slopes. These localized wind patterns significantly impact the city’s air quality, microclimate, and urban planning.

Spring (March-May)

Spring in Davis offers a vibrant and lively atmosphere. The weather is pleasant, with average temperatures ranging from 50°F to 75°F. The city comes alive with blooming flowers, including a profusion of poppies in the surrounding countryside. This season is ideal for outdoor activities such as biking, hiking, and exploring the vibrant downtown area. The Davis Farmers Market is in full swing on Saturdays, showcasing fresh produce, local crafts, and live music.

Fall (September-November)

Fall brings cooler temperatures to Davis, with average highs in the low 70s and lows in the mid-40s. This season is known for its beautiful foliage, as the leaves of the surrounding trees turn vibrant shades of red, orange, and yellow. Autumn is an excellent time to visit the University of California, Davis campus and admire its stunning architecture and lush grounds. The city also hosts several festivals during this time, including the Davis Color Run and the Patchwork Show, showcasing local art and crafts.

Solar Energy Resources in Davis

Davis, California enjoys abundant sunshine, making it an ideal location for solar energy utilization. The city receives an average of 290 sunny days per year, with an average daily solar radiation of 5.5 kWh/m2. This favorable solar resource has led to the widespread adoption of solar photovoltaic (PV) systems throughout the city.

Solar Energy Initiatives and Successes

Davis has been a pioneer in the field of solar energy, with numerous initiatives and achievements that have contributed to its environmental sustainability. In 1978, the city became the first in the United States to mandate solar water heating in new homes. As a result, over 80% of homes in Davis now have solar hot water systems, making it one of the highest concentrations of solar thermal systems in the world. Additionally, the city has implemented a number of innovative programs to encourage solar PV adoption, including financial incentives, net metering policies, and educational campaigns. These efforts have led to the installation of solar PV systems on over 4,000 homes and businesses in Davis, generating approximately 20% of the city’s electricity needs.

Elevation and Hills

Davis is situated in the Sacramento Valley, a broad, flat region in northern California. The city’s elevation ranges from 15 feet above sea level in the western part of the city to 38 feet above sea level in the eastern part. Davis does not have any significant hills or mountains within its city limits. However, the nearby Vaca Mountains and Mount Diablo offer scenic views and hiking trails for outdoor enthusiasts.

Landforms and Waterways

Davis is characterized by a gently rolling landscape with a mix of agricultural and urban areas. Notable landforms in the city include the Davis Arboretum, a 100-acre botanical garden with a diverse collection of trees and plants; Lake Davis, a small recreational lake located in the northwest section of the city; and the Putah Creek Riparian Reserve, a 1,000-acre nature preserve that borders the city on the east. The city is also home to several canals and waterways, including the Putah Creek Channel, which runs through the center of the city, and the Davis Slough, a smaller waterway that flows parallel to Putah Creek. These waterways provide important habitat for wildlife and offer opportunities for fishing, canoeing, and other recreational activities.

Sacramento International Airport (SMF)

Sacramento International Airport (SMF) is the closest major airport to Davis, California, located approximately 14 miles (22 kilometers) southwest of the city. SMF is a spacious and modern facility with a wide range of amenities, including multiple terminals, duty-free shops, and restaurants. The airport serves several major domestic and international carriers, offering a wide range of flight options and connections. SMF is also well-connected to Davis by public transportation, with buses and light rail services available to transport passengers between the airport and the city center.

Oakland International Airport (OAK)

Oakland International Airport (OAK) is another option for air travel near Davis, located approximately 60 miles (97 kilometers) southwest of the city. OAK is a smaller airport than SMF but still offers a significant number of flight options, particularly for budget travelers. OAK is home to several low-cost carriers, making it a popular choice for those seeking affordable airfare. The airport is accessible from Davis via a combination of bus and train services, with a total travel time of around 2 hours.

History and Culture

Nestled in the heart of California’s Sacramento Valley, Davis is a vibrant city steeped in history and culture. Founded in 1917 as a planned community for the University of California, Davis, the city has since evolved into a hub for academics, agriculture, and outdoor recreation. Its rich heritage is showcased in various historic landmarks, including the Davis Theatre Guild, the Putah Creek Greenway, and the Davis Farmers Market, which has been a beloved gathering spot for locals and visitors alike for over 50 years. The University of California, Davis, contributes significantly to the city’s cultural scene with its renowned performing arts programs, museums, and lecture series.

Outdoor Recreation

Davis is an outdoor enthusiast’s paradise. The city’s extensive network of bike paths and greenways provides ample opportunities for cycling, jogging, and leisurely strolls. The nearby Lake Berryessa, Putah Creek, and Dixon Wildlife Refuge offer a range of water activities, including swimming, boating, and wildlife viewing. For those seeking a more rugged adventure, the surrounding Sierra Nevada foothills are just a short drive away, beckoning hikers and mountain bikers to explore their breathtaking trails. With its abundance of parks and open spaces, Davis is an ideal destination for anyone who enjoys spending time in nature.