Pomona Climate & Monthly Temperature Overview – United States

General Climate:

Pomona experiences a Mediterranean climate, characterized by warm, dry summers and mild, wet winters. Summer temperatures typically range from the mid-60s to low 90s Fahrenheit (18-34 degrees Celsius), with little humidity and abundant sunshine. Winter temperatures are typically in the mid-40s to mid-60s Fahrenheit (7-18 degrees Celsius), with occasional rainfall and fog. Pomona receives an average of 15 inches (381 millimeters) of precipitation annually, mostly during the winter months.

Seasonal Variations:

Spring in Pomona brings warming temperatures, blooming flowers, and intermittent rainfall. Average temperatures range from the mid-50s to mid-70s Fahrenheit (13-24 degrees Celsius). Summer is the warmest and driest season, with average temperatures in the mid-60s to low 90s Fahrenheit (18-34 degrees Celsius). Fall temperatures gradually cool down, with average temperatures ranging from the mid-50s to mid-70s Fahrenheit (13-24 degrees Celsius), and occasional rainfall. Winter is the coolest and wettest season, with average temperatures in the mid-40s to mid-60s Fahrenheit (7-18 degrees Celsius), and occasional fog and rainfall.

Average Summer Temperature in Pomona, United States

Pomona, California, experiences warm summers with average temperatures hovering around 86°F (30°C) in July and August. However, the heat can reach much higher on certain days, with temperatures occasionally spiking above 100°F (38°C). The combination of heat and humidity can make these summer months uncomfortable for some, but there are plenty of ways to cool off and enjoy the warm weather.

The warm temperatures make Pomona an ideal destination for outdoor activities such as swimming, hiking, and biking. There are also many parks and gardens to explore, offering respite from the heat. Pomona is also home to several waterparks and splash pads, providing a fun way to cool off and beat the summer heat. Evenings are usually more comfortable, with temperatures dropping into the mid-60s (°F), making it a good time for outdoor dining or a stroll through the city.

Cloud Cover and Types

Pomona experiences a diverse range of cloud cover throughout the year. During the summer months, the skies are often characterized by cumulus clouds, which are puffy and have flat bases. These clouds are associated with fair weather and can sometimes bring isolated showers. In the fall and winter, the cloud cover becomes more variable, with a mix of altocumulus, stratus, and nimbostratus clouds. Altocumulus clouds are white or gray and appear in patches or layers, while stratus clouds are low, uniform, and cover the entire sky, often accompanied by drizzle or light rain. Nimbostratus clouds are similar to stratus clouds but produce continuous, steady precipitation.

Impact on Weather and Activities

The cloud cover in Pomona plays a significant role in shaping the weather conditions. Cumulus clouds, common in summer, provide shade and help regulate temperatures. Altocumulus and stratus clouds, prevalent in fall and winter, can bring overcast skies and lead to cooler temperatures. Nimbostratus clouds often bring prolonged rainfall, which can impact outdoor activities and transportation. However, all types of cloud cover can provide beautiful visual displays, particularly during sunrise and sunset, enhancing the natural beauty of the Pomona area.

Distribution of Precipitation

Pomona, located in Southern California, United States, experiences a distinct seasonal pattern of precipitation. The region is characterized by a Mediterranean climate, with dry summers and wet winters. Annual precipitation averages around 500 millimeters (20 inches), with the majority falling between October and April. During the dry season (May to September), precipitation is scarce, often resulting in prolonged periods of drought. In contrast, the wet season brings frequent rainfall, which can sometimes lead to flooding.

Seasonal Variations

The distribution of precipitation in Pomona is influenced by various factors, including the region’s topography and proximity to the Pacific Ocean. During the winter, storm systems moving from the west bring moist air and precipitation to the area. The coastal mountains act as a barrier, forcing the air to rise and condense, leading to increased precipitation in the foothills where Pomona is situated. In the summer, the region falls under the influence of the North Pacific High-Pressure System, which creates a stable and dry atmosphere, resulting in minimal precipitation.

Average Rainfall

Pomona, located in southern California, experiences a Mediterranean climate with hot, dry summers and mild, wet winters. The average annual rainfall is relatively low, at around 30 inches. The majority of this precipitation falls between November and April, with the driest months being June through August.

Seasonal Variations

During the winter, Pacific storms bring most of the rainfall to Pomona. January and February are typically the wettest months, with average precipitation of around 5 inches each. In the spring and fall, rainfall is more sporadic and typically occurs in the form of showers. Summer is the driest season, with very little precipitation.

Historically Infrequent Snowfall

Pomona, California, historically known for its mild Mediterranean climate, experiences snowfall infrequently. In recorded history, significant snowfall occurred in the city only a handful of times, the most notable being in 1949. During this event, snow fell to a depth of 5 inches, blanketing the streets and rooftops in a picturesque winter wonderland. Other instances of snowfall in Pomona include December 1967, with 1 inch of snow, and February 1976, with a dusting of snow.

Recent Snowfall Event

In a rare occurrence, Pomona witnessed snowfall on January 17, 2023. The snowfall, the first in over 40 years, began as a light dusting and gradually accumulated throughout the day, reaching a depth of approximately 2 inches. This snowfall event brought delight to residents who enjoyed the novelty of experiencing snow in their city. However, due to the infrequent nature of snowfall in Pomona, many residents were not prepared for the slippery conditions and transportation disruptions that accompanied it.

Current Weather Conditions:

The weather conditions in Pomona, United States, can vary significantly throughout the year. During the summer months, from June to September, the city experiences warm and dry weather, with average temperatures ranging from 75 to 95°F (24 to 35°C). The humidity levels are typically low, making it feel more comfortable despite the high temperatures. Pomona’s location in the Los Angeles basin also means that it receives abundant sunshine, with an average of 300 sunny days per year.

Seasonal Variations:

In the fall and spring months, the weather in Pomona is generally mild and pleasant, with temperatures ranging from the mid-50s to mid-70s°F (13 to 24°C). During these transitional seasons, the skies tend to be partly cloudy, with occasional light rain showers. The winter months, from December to February, are typically cool and wet, with average temperatures ranging from the low 40s to mid-50s°F (6 to 13°C). Pomona experiences its fair share of precipitation during this time of the year, with an average of 15 inches (38 centimeters) of rainfall. Snowfall is rare, but it can occur occasionally in the higher elevations surrounding the city.

Weather Conditions

The weather conditions in Pomona, United States, can have a significant impact on the visibility of the moon. Pomona enjoys a Mediterranean climate characterized by warm, dry summers and mild, wet winters. During the summer months, the skies are typically clear, offering excellent conditions for moon viewing. However, during the winter months, there is a higher probability of overcast skies and precipitation, which can obscure the moon.

Observing the Moon

For optimal moon viewing in Pomona, it is recommended to find an area with clear visibility and minimal light pollution. Vasquez Rocks Natural Area Park is a popular destination for stargazing and offers panoramic views of the night sky. Alternatively, the Pomona Fairplex can provide a convenient location for moon viewing within the city limits. It is advisable to use binoculars or a telescope to enhance the visibility of the moon’s surface features, such as craters, mountains, and valleys.

Humidity in Pomona, United States

Pomona, located in Southern California, experiences a Mediterranean climate characterized by warm, dry summers and mild, wet winters. Humidity levels vary significantly throughout the year, influenced by factors such as proximity to the Pacific Ocean, temperature, and prevailing wind patterns.

During the summer months (June to September), humidity levels in Pomona are generally low, typically ranging from 40% to 60%. The warm, dry conditions are a result of the influence of the subtropical high-pressure system that dominates the region during this time. The prevailing winds from the north and northeast bring dry air from the inland desert areas, further reducing humidity. However, on some days, when the wind shifts to the southwest, moisture from the Pacific Ocean can occasionally increase humidity levels, leading to more uncomfortable conditions.

Wind Speed and Direction

The prevailing wind direction in Pomona is from the west-northwest, with an average speed of 5.3 miles per hour. The strongest winds typically occur during the winter months, when the average speed can reach up to 6.2 miles per hour. During the summer months, the wind speed is typically lower, averaging around 4.5 miles per hour.

Wind Patterns and Impacts

Pomona is located in a wind corridor, which can lead to strong gusts and high winds. The city is also prone to downslope winds from the nearby San Gabriel Mountains, which can cause rapid fluctuations in wind speed and direction. These wind patterns can have a significant impact on the local climate, vegetation, and air quality. The strong winds can also affect transportation, as they can cause road closures and delays.

Spring (March-May)

Spring in Pomona heralds the arrival of vibrant wildflowers and verdant landscapes. Temperatures range from mild to warm, with average highs in the 70s Fahrenheit (21-26°C). As the season progresses, the air becomes fragrant with the scent of orange blossoms, adding a touch of sweetness to the atmosphere. This time of year is ideal for outdoor activities such as hiking, biking, and picnicking in the numerous parks and trails surrounding Pomona. Additionally, several festivals and events take place during spring, including the Pomona Valley Scottish Highland Games and the Claremont Village Art & Wine Festival, offering visitors a festive and cultural experience.

Fall (September-November)

Fall in Pomona brings a welcome respite from the summer heat. The temperature cools down to comfortable levels, with average highs in the 70s Fahrenheit (21-26°C). As the leaves start to turn brilliant shades of yellow, red, and orange, the city’s parks and gardens transform into a picturesque canvas. Fall is a great time for apple picking at nearby farms, exploring the Claremont Colleges campus, or taking a leisurely stroll through the charming historic downtown area. Pomona’s annual Oktoberfest celebration in September adds a touch of Bavarian flair to the festivities, featuring live music, authentic cuisine, and a festive atmosphere.

Solar Potential and Resources

Pomona, located in Southern California, boasts significant solar potential due to its favorable climate characterized by ample sunlight year-round. The city receives an average of 7.5 peak sunlight hours per day, making it an ideal location for solar energy generation. Furthermore, Pomona has implemented several policies and initiatives to encourage solar adoption, including a solar energy rebate program and simplified permitting processes. As a result, the city has seen a surge in rooftop and community solar installations in recent years.

Benefits and Impact

The adoption of solar energy in Pomona has yielded numerous environmental and economic benefits. By utilizing renewable energy, the city reduces its reliance on fossil fuels, contributing to cleaner air and mitigating climate change. Solar panels installed on homes and businesses generate electricity at a lower cost compared to traditional energy sources, leading to reduced energy bills and increased energy independence. Additionally, the solar industry has created new jobs and stimulated local economic growth, supporting the development of a sustainable and thriving community.

Topography of Pomona, United States – Geographic Features

Pomona, a city located in Southern California, is renowned for its picturesque topography. The city is situated in the Pomona Valley, a broad alluvial plain formed by the Santa Ana River. The valley is bordered by the San Gabriel Mountains to the north and the Puente Hills to the south. The San Gabriel Mountains, with their rugged peaks and lush vegetation, provide a stunning backdrop to the city, while the Puente Hills offer panoramic views of the surrounding landscape.

Topography of Pomona, United States – Elevation and Drainage

Pomona has a relatively flat topography, with an elevation that ranges from 200 feet above sea level near the San Gabriel River to 500 feet in the eastern part of the city. The city’s terrain is gently sloping, with the higher elevations located in the east and west while the lower elevations are found in the central and southern areas. The Santa Ana River, a major waterway that flows through the Pomona Valley, provides drainage for the city and its surrounding regions. The river, along with its tributaries, has shaped the local topography over time, forming floodplains and terraces that contribute to the city’s unique landscape.

Ontario International Airport (ONT)

Ontario International Airport (ONT) is the closest commercial airport to Pomona, located just 13 miles (21 kilometers) away. The airport offers a wide range of domestic and international flights, with connections to major cities across the United States, Canada, and Mexico. ONT is served by several major airlines, including American Airlines, Delta Air Lines, Southwest Airlines, and United Airlines. The airport is easily accessible by car or public transportation, and it features a variety of amenities for travelers, such as restaurants, shops, and a currency exchange.

John Wayne Airport (SNA)

John Wayne Airport (SNA) is another nearby airport option for travelers visiting Pomona. Located in Santa Ana, California, SNA is approximately 30 miles (48 kilometers) from Pomona. SNA is a mid-sized commercial airport that serves a number of domestic and international destinations, primarily in the western United States and Mexico. The airport is served by several major airlines, including American Airlines, Delta Air Lines, Southwest Airlines, and United Airlines. SNA is easily accessible by car or public transportation, and it offers a variety of amenities for travelers, including restaurants, shops, and a currency exchange.

Demographics and Economy

Pomona, California is a diverse city located in Los Angeles County, with a population of around 150,000. The city is home to a large Hispanic population, as well as sizable African American and Asian communities. Pomona’s economy is based on a mix of industries, including manufacturing, retail, and healthcare. The city is also home to several colleges and universities, including Cal Poly Pomona and Western University of Health Sciences.

Culture and Recreation

Pomona has a vibrant cultural scene, with a variety of art galleries, museums, and theaters. The city is also home to several parks and recreation areas, including the Pomona Fairplex, which hosts the annual Los Angeles County Fair. Pomona is also known for its annual Glass House Concert Series, which features performances by classical and contemporary musicians.