Pomona, California, boasts a diverse climate, making it an interesting location to explore.
The hottest month of the year is August, with average highs of 92°F and lows of 64°F.
On the other end of the spectrum, the cool season runs from late November to mid-March, where daily highs are below 71°F, providing a milder experience compared to the hot summer months.
Monthly averages and weather patterns in Pomona show noticeable differences across the year.
During winter, January records the lowest daily sunshine hours, with about 7.56 hours per day on average.
For those interested in the statistical analysis of weather conditions, Pomona enjoys a total of 3457.36 hours of sunshine annually, equating to a monthly average of 113.53 hours.
For anyone planning to visit or move to Pomona, understanding historical weather data and climate forecasts is essential.
The area’s climate is characterized by dry summers and mild, wetter winters, typical of many regions within the Northern Hemisphere of the United States.
Those looking for detailed monthly weather averages will find useful information to help them understand what to expect throughout the year.
Average Temperature In Pomona, California
Pomona’s climate features mild winters and hot summers.
In January, the average high temperature is 67°F, and the average low is 44°F. This month is considered the coldest month of the year.
As it warms up, March sees average highs around 71°F.
April and May continue this trend, with temperatures climbing steadily.
June through August are the warmest months.
The hottest month is August, with an average high of 92°F and a low of 64°F.
September and October experience similar warmth with a slight cooling trend.
When November arrives, temperatures drop to an average high of 71°F and a low of 50°F. December’s figures further decrease.
A table for clarity:
| Month | Avg. High (°F) | Avg. Low (°F) |
|---|---|---|
| January | 67 | 44 |
| February | 67 | 45 |
| March | 71 | 48 |
| April | 75 | 52 |
| May | 78 | 57 |
| June | 84 | 62 |
| July | 90 | 65 |
| August | 92 | 64 |
| September | 88 | 62 |
| October | 80 | 55 |
| November | 71 | 50 |
| December | 67 | 45 |
These temperatures indicate well-distributed warmth throughout the year, with significant variation between the hottest and coldest months.
Average Precipitation In Pomona, California
Precipitation in Pomona, California includes both rainfall and the rare occurrence of snow. The city experiences distinct wet and dry periods throughout the year.
Average Rainfall In Pomona, California
Pomona sees most of its rainfall during the cooler months.
The wettest month is usually February, with an average rainfall of about 3.5 inches.
The average annual precipitation is approximately 20 inches, though this can vary year to year.
Rainfall Data:
- Wettest Month: February (3.5 inches)
- Driest Month: July (0.01 inches)
- Annual Average: 20 inches
Rainy days are more frequent from November to March, with February often having the most wet days.
During the summer, rainfall is minimal, making it important for residents to be aware of water conservation.
Average Snow In Pomona, California
Snow is extremely rare in Pomona. The city’s mild climate means that winters do not typically bring snow. On the rare occasion it does snow, it doesn’t accumulate significantly.
Snow Data:
- Annual Snowfall: Less than 1 inch
- Typical Months: December, January
- Frequency: Rare
Most residents will not see snow each year. When snow falls, it can temporarily impact travel and activities, but these events are short-lived and infrequent.
For more information about weather-related topics, such as snow and ice, residents can explore further to understand how these elements occasionally affect their area.
Average Sun In Pomona, California
Pomona, California enjoys a significant amount of sunshine year-round, with varying daylight hours depending on the season. The summer months are particularly sunny, providing ample daylight for outdoor activities.
Average Daily Shortwave Solar Energy In Pomona, California
Pomona experiences an average of 3,457.36 hours of sunlight annually.
This results in approximately 113.53 hours of sun per month.
During summer, when the days are longest, residents can expect more than 14 hours of daylight per day, although actual sunshine may be somewhat less due to weather conditions like partly cloudy days.
In January, the city records the lowest daily sunshine hours, averaging about 7.56 hours per day.
This is significantly lower than the peak summer months, but still provides a good amount of light.
Pomona’s year-round sunny weather supports a variety of outdoor activities and helps maintain a warm, inviting climate.
Average Humidity In Pomona, California
Pomona experiences moderate humidity levels throughout the year. Relative humidity varies depending on the season and weather conditions.
Typically, the annual average humidity in Pomona hovers around 58%.
The humidity is higher during the cooler months. For instance, January usually has higher humidity levels due to cooler temperatures and occasional rain.
Conversely, summer months tend to be drier.
August, the hottest month with average highs of 92°F, often sees lower humidity.
| Month | Average Humidity (%) |
|---|---|
| January | 60% |
| February | 58% |
| March | 56% |
| April | 54% |
| May | 52% |
| June | 50% |
| July | 48% |
| August | 46% |
| September | 50% |
| October | 54% |
| November | 56% |
| December | 58% |
The dew point in Pomona aligns with the humidity levels, measuring around 48°F on average. This indicates the temperature at which air becomes saturated and water droplets form.
For more detailed climate and weather data, you can refer to sites like Climate & Weather Averages in Pomona, California and Climate and Average Weather Year Round in Pomona.
Average Wind in Pomona, California
The average wind speed in Pomona is relatively mild, typically around 7 mph.
Wind Speed
On the windiest days, gusts can be slightly higher but rarely exceed 15 mph. Most days, the wind is gentle, adding to Pomona’s comfortable climate.
Windiest Month
The windiest month in Pomona is often around January. During this time, daily wind speeds tend to increase slightly compared to the rest of the year.
Monthly Average Wind Speeds
| Month | Average Wind Speed (mph) |
|---|---|
| January | 7.0 |
| April | 6.5 |
| July | 5.5 |
| October | 6.0 |
Daily Patterns
Wind in Pomona typically picks up during the late afternoon. Morning hours are often calm, making it an ideal time for outdoor activities that might be disrupted by breeze.
The articles on wind offer deeper insights into how wind patterns can affect daily life and activities.
Average Air Quality In Pomona, California
Pomona, California, often experiences good air quality throughout the year. According to data from IQAir, the Air Quality Index (AQI) typically falls within the “Good” range, which means air pollution poses little or no risk.
During certain periods, the AQI can shift to “Moderate.”
Concerns about air quality can increase alongside temperature, pressure changes, and other weather conditions.
For instance, when the temperature rises above 87°F and atmospheric pressure hovers around 1013 mb to 1019 mb, pollutants can become more concentrated.
Key Factors Affecting Air Quality:
- Temperature: Higher temperatures, often exceeding 90°F, can lead to an increase in ozone levels.
- Pressure: Atmospheric pressure readings generally range from 29.9 to 30.1 inches (1012 to 1018 mb). Variations in pressure can influence the concentration of pollutants.
- Humidity: On clear sky days with around 37% humidity, air quality tends to remain good due to the lack of moisture that can trap pollutants.
Typical AQI Readings:
| Location | AQI Value | Category |
|---|---|---|
| Garfield Avenue | 27 | Good |
| Pomona Historic Lincoln Park | 34 | Good |
| Pomona Station | 36 | Good |
| N Garey and Bonita | 42 | Good |
The AccuWeather forecasts also indicate that Pomona enjoys significant stretches of good air quality, making it a generally healthy place to live and breathe.
Topography Of Pomona, California
Pomona, California, is located in Los Angeles County. The city lies in an area with an average elevation of about 292 meters (958 feet).
This elevation contributes to the city’s varied terrain, making it a blend of flat and hilly areas.
The city is surrounded by the San Gabriel Mountains to the north. These mountains create a scenic backdrop and provide recreational opportunities for residents and visitors.
Pomona falls under the Mediterranean climate zone (Csb), which means it has hot, dry summers and mild, wet winters.
This climate is typical for areas at similar elevations and latitudes in California.
Residents and visitors can explore the diverse terrain by using topographic maps of the area.
These maps highlight the distinct changes in elevation and the various landforms that define Pomona’s landscape.
Pomona’s unique topography impacts its weather patterns, making it a fascinating place to study and visit for those interested in geography and climate.
For more detailed topographic information, you can check the Pomona topographic map.
Extreme Weather Events That Occur In Pomona, California
Pomona, California experiences a variety of extreme weather events. These include intense heat waves, thunderstorms, and wildfires.
Heat waves are a significant concern.
During the summer, temperatures can soar above 100°F. This can lead to health risks like heat stroke and dehydration.
Thunderstorms occur often in Pomona. They can bring heavy rainfall, strong winds, and lightning.
Sometimes, these storms can also lead to hail, which can damage property and crops.
Wildfires are another serious threat.
In recent years, California has faced an increased risk of wildfires. These fires can spread rapidly due to dry conditions and strong winds, leading to large-scale destruction.
Pomona’s weather is also influenced by atmospheric phenomena.
This includes variations in weather patterns that can cause sudden changes in temperature or precipitation.
Best Time Of The Year To Visit Pomona, California
Pomona, California experiences a variety of weather conditions throughout the year. The climate shifts from mild and wet winters to hot and dry summers, making certain seasons more ideal for visiting.
What Is Pomona, California Like In Spring
Spring in Pomona is mild and pleasant. From March to May, average high temperatures range from the mid-60s to the low-80s Fahrenheit.
This season is marked by blooming flowers and green landscapes.
Rainfall is moderate, with occasional showers in March and April.
This makes it perfect for outdoor activities like hiking and exploring local parks. Visitors can enjoy events and festivals held in the city during this time, such as the annual Pomona Art Walk.
Spring is generally considered a great time to visit due to the comfortable temperatures and vibrant scenery.
What Is Pomona, California Like In Summer
Summer in Pomona is hot and dry. The temperatures during June to September can rise above 90°F, with August being the hottest month.
Nighttime temperatures remain comfortable, typically in the mid-60s.
Rainfall is scarce, making it ideal for visits to the area’s outdoor attractions.
However, the heat may be intense for some, so staying hydrated and seeking shade is important.
Popular activities during the summer include visiting local pools, attending outdoor concerts, and exploring nearby hiking trails.
Despite the high temperatures, the clear skies and dry weather are favorable for those who enjoy sunny days.
What Is Pomona, California Like In Fall
Fall in Pomona offers mild and pleasant weather. From September through November, temperatures gradually cool down from the high 80s to the mid-70s°F.
This season is known for its comfortable climate and clear skies.
Rainfall remains low, so outdoor activities are still very much an option.
Visiting the Fairplex to experience the LA County Fair in September is a popular activity. The changing leaves also create a beautiful backdrop for exploring the city’s parks and gardens.
Fall is a great time for visitors who want to enjoy mild weather without the crowds of summer.
What Is Pomona, California Like In Winter
Winter in Pomona is mild and wet.
From December to February, temperatures range from the mid-60s during the day to the low-40s°F at night.
Rainfall is more common, with January and February being the wettest months.
Despite the increased rainfall, there are still plenty of dry days to enjoy outdoor activities.
The cooler weather provides a break from the intense summer heat, making it a good time for those who prefer milder conditions.
Winter festivals and holiday events add to the charm of visiting Pomona during this season.
The city’s parks and museums are also less crowded, providing a more relaxed experience.