Fresno, California, offers a diverse climate that suits various preferences throughout the year.
The hottest month of the year in Fresno is July, with average high temperatures reaching up to 98°F and lows around 68°F.
Winters in Fresno are mild, with the coldest month being December. December features average highs of 57°F and lows of 40°F.
The weather conditions in Fresno show significant changes between summer and winter.
While summer days are long, with up to 14.6 hours of daylight in June, winter days are shorter, offering about 9.7 hours of daylight in December.
This variation provides a range of activities for residents and visitors throughout the seasons.
Rainfall in Fresno is relatively low, under 1 inch per month on average, making it a dry region, especially during summer months.
Those who enjoy plenty of sunshine will find Fresno appealing, as it boasts prolonged sunshine hours. June, July, and August peak with 12.1 hours of sun each day.
To learn more about Fresno’s engaging climate and typical weather conditions, keep reading.
Average Temperature in Fresno, California
Fresno experiences varied temperatures through the year.
During the hottest month, July, the average high temperature reaches 98°F, while the low temperature dips to 68°F.
In contrast, December is the coldest month. The average high is 57°F and the low is 40°F.
The cool season runs from November 19 to February 22. During this period, the average daily high temperature can drop below 64°F.
The chart below provides a quick look at the average monthly temperatures:
| Month | Average High (°F) | Average Low (°F) |
|---|---|---|
| January | 59 | 41 |
| February | 63 | 43 |
| March | 69 | 47 |
| April | 76 | 52 |
| May | 85 | 59 |
| June | 94 | 66 |
| July | 98 | 68 |
| August | 96 | 67 |
| September | 90 | 63 |
| October | 79 | 54 |
| November | 65 | 45 |
| December | 57 | 40 |
During summer nights, temperatures stay warmer, often around 68°F in July and August.
While winters in Fresno can be chilly, nights in December dip to an average low of 40°F.
This temperature data helps locals and visitors plan their activities and attire year-round. More details on temperature variations can be found in related articles.
Average Precipitation in Fresno, California
Fresno experiences varying levels of precipitation throughout the year, with distinct patterns in rainfall and minor occurrences of snow. The city has a dry season and a wet season, affecting both the amount of rain and the occasional snowfall.
Average Rainfall in Fresno, California
In Fresno, most of the rain falls during the winter months. December is generally the wettest month, with an average of around 2.3 inches of rain.
January follows closely, also with significant rainfall figures.
During the dry season, especially from May to September, rainfall is quite minimal.
The city receives an overall average of approximately 11 inches of rain annually.
This contributes to the lush growth seen in the spring and early summer.
The dry season sees virtually no rain, with particularly dry months like July getting less than 0.1 inches of rainfall.
Rain is mostly measured in inches and varies greatly throughout the year.
Average Snow in Fresno, California
Snow is quite rare in Fresno. The city’s climate does not favor snowfall due to its relatively warm winters.
When snow does occur, it is usually very minimal. It is almost always less than an inch and usually melts quickly, barely covering the ground.
There are only rare situations where snow might accumulate. Even during these times, residents shouldn’t expect more than a light dusting.
The most significant snowfall in recent history was still under an inch. For those interested, snow and ice facts can offer more insights into how exceptional these events are in California.
Average Sun in Fresno, California
Fresno, California enjoys abundant sunshine throughout the year, with long summer days and relatively fewer daylight hours in winter. The area experiences significant daily solar radiation, contributing to its warm climate.
Average Daily Shortwave Solar Energy in Fresno, California
Fresno receives a high amount of shortwave solar energy daily.
During the summer months, particularly June, July, and August, the sunshine hours peak at approximately 12.1 hours per day.
This high level of solar energy contributes to the city’s hot summers, with average daily high temperatures often reaching 98°F in July.
In winter, the daylight hours decrease, with December having about 9.7 hours of daylight.
Despite shorter days, the sunshine remains consistent, providing Fresno with a sunny and mild winter climate. The average daily high in December is around 57°F, paired with ample sunshine, making it a pleasant season.
UV index levels in Fresno can be high, especially in summer, indicating strong sunlight and potential risk of sunburn. People should take protective measures like using sunscreen during these months.
Average Humidity in Fresno, California
The average humidity in Fresno varies significantly throughout the year.
In January, which is typically the most humid month, the relative humidity averages around 83%.
On the other hand, July is the least humid month, with relative humidity dropping to approximately 38%.
Monthly Averages
- January: 83%
- February: 80%
- March: 73%
- April: 60%
- May: 50%
- June: 42%
- July: 38%
- August: 39%
- September: 45%
- October: 55%
- November: 70%
- December: 80%
The average annual relative humidity in Fresno is about 58%.
Comparison
For perspective:
- Peak Humidity: 83% in January
- Lowest Humidity: 38% in July
Average Wind in Fresno, California
Fresno experiences moderate wind speeds throughout the year. The average wind speed varies, with the wind being generally calm.
Wind speeds in Fresno are typically between 5 to 10 miles per hour.
The majority of the year sees lower wind speeds, contributing to the city’s relatively stable weather conditions.
Spring and summer months might show slightly higher average speeds. During these times, wind speeds can occasionally reach up to 15 miles per hour, but this is not frequent.
In contrast, the winter months tend to have calmer winds. For instance, average speeds can dip to around 5 miles per hour, providing a serene atmosphere in the colder months.
Fresno’s stable wind patterns make it a less windy city.
Those interested in tracking wind conditions can find detailed insights on wind speeds and patterns in articles about wind.
This consistent wind behavior ensures fewer disruptions to outdoor activities, making Fresno a pleasant place for year-round outdoor events and activities.
Average Air Quality in Fresno, California
Fresno’s air quality varies throughout the year.
During the summer months, temperatures can soar above 100°F, contributing to higher levels of ground-level ozone. This often affects visibility, causing a hazy appearance in the atmosphere.
In winter, the air tends to clear out with cooler temperatures and more frequent rain.
The average Air Quality Index (AQI) generally ranges from moderate to good, though it can occasionally spike due to local pollution sources.
Factors Affecting Air Quality
- PM2.5 Levels: Particulate matter is a major contributor to air pollution. On average, Fresno has moderate levels of PM2.5, especially during wildfire season.
- Fog: During late fall and winter, fog can reduce visibility significantly, sometimes leading to hazardous driving conditions.
- Cloud Cover: Fresno typically experiences limited cloud cover, with most days being sunny. However, during certain times of the year, clouds can impact temperature and air quality.
According to IQAir, the current air quality is often in the “Good” category, ensuring safe outdoor activities for residents.
For those planning activities, AccuWeather provides real-time updates on air quality, allowing individuals to make informed decisions.
Health-conscious residents can also utilize WeatherBug for detailed air quality data, including pollutants like ozone, particulate matter, and carbon monoxide.
The provided data helps residents take necessary precautions, especially during high pollution days.
Topography of Fresno, California
Fresno, California is located in the heart of the San Joaquin Valley.
Elevation: The city’s elevation stands at about 308 feet above sea level.
The terrain is relatively flat, but small hills dot the outskirts.
This flat landscape makes it ideal for agriculture, with vast expanses of farmland surrounding the city.
The area is characterized by its fertile soil. This soil quality contributes to Fresno’s reputation as an agricultural hub.
To the east, the Sierra Nevada mountains rise, providing a striking contrast to the otherwise flat landscape.
These mountains influence the region’s climate and water supply.
The city is bisected by several rivers, including the San Joaquin River.
These waterways are essential for irrigation and contribute to the lush greenery of the region.
The proximity to major geographical features like the Sierra Nevada and the Central Coast Range shapes Fresno’s topography and climate.
Mixed urban and rural landscapes are present within Fresno, with a variety of natural and man-made structures.
This mix creates a diverse environment for both residents and wildlife.
Fresno’s flat terrain and moderate elevation play significant roles in its weather patterns and agricultural productivity.
The unique topographical features make Fresno an interesting blend of urban development and natural beauty.
Extreme Weather Events That Occur in Fresno, California
Fresno, California, experiences several extreme weather events throughout the year.
The city often faces intense heat waves, especially in the summer months.
In July 2024, Fresno recorded its hottest July temperatures ever, with many days soaring above 100°F.
Records show that recent heat waves pushed temperatures to a high of 114°F in September.
Fresno is prone to periods of severe drought.
These dry conditions can lead to water shortages, affecting agriculture and daily life.
The lack of rainfall exacerbates the already hot climate, creating challenging living conditions.
High temperatures and dry conditions increase the risk of wildfires.
Fires can spread rapidly, causing property damage and health impacts due to poor air quality.
The 2024 season saw significant fire activity in the surrounding areas.
While less frequent, floods can occur during heavy rainfalls or when snow in the Sierra Nevada mountains melts rapidly.
These events often lead to road closures and property damage. Floods can also have long-lasting effects on both agricultural lands and urban areas.
Air Quality Issues
Extreme heat and wildfires contribute to poor air quality.
High levels of pollutants and smoke can lead to respiratory problems, particularly among vulnerable populations.
Air quality warnings are common during the peak summer months.
Best Time of the Year to Visit Fresno, California
Fresno offers different experiences depending on the season. Warm, dry summers and mild winters define its climate. The best times to visit often depend on personal preferences for weather and activities.
What Is Fresno, California Like in Spring
Spring in Fresno spans from March to May.
This season is known for its pleasant temperatures and blooming flowers.
Highs range from the mid-60s in March to the mid-80s by May.
Nights are cooler, ranging from the 40s to the 50s.
Rainfall is relatively low but can happen, especially in March.
Daylight increases as the season progresses, which is great for outdoor activities like visiting parks or taking scenic drives.
Fresno’s agricultural areas begin to burst with activity, making it an excellent time to enjoy local produce.
What Is Fresno, California Like in Summer
Summer in Fresno is hot and dry.
From June to August, temperatures often exceed 90°F, especially in July when highs can reach around 98°F during the day.
Evenings offer some relief, with lows in the high 60s.
Summer days are long, with up to 14.6 hours of daylight in June, offering plenty of time for sightseeing.
Although it’s hot, the dry air makes it bearable.
For those who enjoy warm weather, summer is ideal for poolside relaxation or exploring air-conditioned attractions.
It’s also a great time for evening outdoor activities as temperatures drop after sunset.
What Is Fresno, California Like in Fall
Fall brings a welcome cooldown to Fresno.
From September to November, temperatures gradually fall from the 80s in September to the 60s by November.
Nighttime temperatures range from the low 60s in early fall to around 40°F by November.
The dry season continues, making it less likely to rain.
Daylight decreases as November approaches, but there’s still enough for daytime activities.
The autumn months are perfect for visiting vineyards and enjoying local wine, as well as exploring Fresno’s parks and hiking trails.
The cooler weather also makes it a great time for outdoor festivals and events.
What Is Fresno, California Like in Winter
Winter in Fresno, which lasts from December to February, is mild compared to other parts of the United States.
Daytime highs are usually in the mid-50s to low 60s, while nighttime lows can dip into the high 30s.
Rain is more frequent but still relatively light, with December being one of the wetter months.
Despite shorter days, with about 9.7 hours of daylight in December, it’s a great time for indoor activities and cultural experiences.
Winter markets and local shops are popular during this time, making it enjoyable for those who prefer cooler temperatures.