Berkeley, California, enjoys a pleasant Mediterranean climate that makes it a year-round delight.
The hottest month of the year in Berkeley is September, with an average high of 75°F and a low of 56°F.
This mild weather, combined with its fantastic location, makes Berkeley an attractive destination for both tourists and residents.
Winters in Berkeley tend to be mild, with highs in the low 60s and lows around 44°F in January, the coldest month.
The cool season, lasting from late November to early February, brings average daily high temperatures below 59°F.
Berkeley receives an average of 25 inches of rain each year, most of which falls from November to March.
For those who appreciate sunny days, the summer months from June through September are ideal, with very little rain and plenty of sunshine.
Berkeley’s weather conditions allow for diverse outdoor activities throughout the year, from exploring the hills to enjoying the Bay.
Whether you are planning to visit or settle down, Berkeley’s climate offers something for everyone.
Average Temperature in Berkeley, California
Berkeley, California, enjoys mild weather throughout the year.
The average high temperature in the warmest months, such as September, reaches around 75°F, while the average low during this period is approximately 56°F.
In contrast, the cool season lasts from late November to early February.
During this time, the average daily high temperature stays below 59°F.
The coldest month is January, with average highs of 56°F and lows of 44°F.
Here’s a brief look at Berkeley’s average temperatures by month:
| Month | Average High (°F) | Average Low (°F) |
|---|---|---|
| January | 56 | 44 |
| February | 60 | 47 |
| March | 63 | 49 |
| April | 67 | 50 |
| May | 70 | 53 |
| June | 73 | 55 |
| July | 74 | 56 |
| August | 74 | 56 |
| September | 75 | 56 |
| October | 72 | 54 |
| November | 64 | 50 |
| December | 57 | 45 |
The temperatures remain comfortable, with highs and lows not varying drastically. This range offers a pleasant climate suitable for various activities.
Rain is most sparse from June through September, reflected in the limited number of rainy days.
During these months, the temperature combined with the minimal rainfall makes Berkeley a great place for outdoor activities.
For more detailed temperature information, you can explore specific trends and patterns comprehensively.
Average Precipitation in Berkeley, California
Berkeley experiences a Mediterranean climate with distinct wet and dry seasons. Rainfall is concentrated in the cooler months, while snow is rare.
Average Rainfall in Berkeley, California
Rainfall in Berkeley mainly occurs from November to March.
The wettest month is January, with an average of about 5 inches of rainfall.
February receives about 4.5 inches of rain, making it another significant month for precipitation.
April marks the transition to the dry season, with around 1.5 inches of rain.
May brings even less rain, typically around 0.5 inches.
From June to September, Berkeley sees minimal rainfall, with each month averaging below 0.1 inches.
The rainy season starts again in October with around 1.2 inches of rainfall, increasing to 2 inches in November.
These rainfall patterns provide Berkeley with lush green landscapes in the wet months, while the dry months contribute to a classic Californian summer climate.
Average Snow in Berkeley, California
Snow is extremely rare in Berkeley due to its mild winter temperatures. The city is located at a lower elevation and close to the San Francisco Bay, which moderates the climate. Unlike areas situated higher or further inland, Berkeley seldom experiences snowfall.
The mild temperatures ensure that even during the coldest months of December and January, temperatures typically stay above freezing. This makes snow and ice events uncommon.
For more detailed information about snow and ice patterns in general, you can refer to this article on snow and ice.
Average Sun in Berkeley, California
Berkeley, California enjoys a sunny climate with many clear days throughout the year. This section will provide specific details about the sunlight exposure and solar energy in Berkeley.
Average Daily Shortwave Solar Energy in Berkeley, California
Berkeley receives a significant amount of daily shortwave solar energy.
On average, Berkeley experiences around 2961 hours of sunshine annually. This translates to about 8.1 hours per day.
The amount of solar energy varies throughout the year. The summer months receive more sunlight due to longer days.
The longest day is in June, while December has the shortest day.
In terms of solar energy, the city receives an average of 97.28 kWh/m² per month.
The cloud cover affects the amount of solar energy received, with fewer clouds in the summer months and more clouds in winter.
This variation impacts the UV index, which tends to be higher in summer.
Average Humidity in Berkeley, California
Berkeley, California, experiences a range of humidity levels throughout the year.
The average annual percentage of humidity in Berkeley is 75%. This can vary by month, with some months being more humid than others.
For instance, January is typically the most humid month, with an average humidity of 80%. This is due to cooler temperatures and increased rainfall during winter.
Conversely, October tends to be the least humid month with an average humidity of around 71%.
To help illustrate, here’s a simple chart of average monthly humidity:
| Month | Average Humidity (%) |
|---|---|
| January | 80 |
| February | 78 |
| March | 76 |
| April | 75 |
| May | 73 |
| June | 72 |
| July | 72 |
| August | 73 |
| September | 73 |
| October | 71 |
| November | 74 |
| December | 77 |
These figures are derived from climatic data in nearby San Francisco, located approximately 18 miles away.
Berkeley’s coastal location and proximity to the Pacific Ocean significantly influence its humidity levels.
While the city does not experience extreme humidity, changes in weather patterns can cause fluctuations. The humidity levels can affect comfort and energy efficiency in homes and buildings.
Average Wind in Berkeley, California
Berkeley, California experiences moderate winds year-round.
The average wind speed ranges between 10 to 14 mph, consistent throughout the year.
Spring and summer months tend to be windier, especially in the afternoon and early evening.
The windiest month is often May, with speeds up to 14 mph.
Rich in data, the website provides useful insights on wind patterns.
In comparison, fall and winter see calmer days, though occasional gusts are still notable.
Wind direction typically shifts from the north in the morning to the west in the afternoon.
Wind impacts local activities and weather, making it a significant element of Berkeley’s climate.
Average Air Quality in Berkeley, California
Berkeley usually has good air quality throughout the year. The city’s Air Quality Index (AQI) typically ranges from 20 to 40, indicating minimal pollution.
In 2019, the Berkeley AQI averaged 30, which is comparable to nearby cities like San Francisco and Oakland.
The air quality can vary. Certain neighborhoods in Berkeley have slightly different AQI levels. For example:
- Crescent: AQI 22
- Hillegass Ave: AQI 25
- Cat Resource Center: AQI 32
- Fairview and King: AQI 35
Seasonal Variations
Winter: Often clear and clean, with AQI seldom exceeding 30. Cool temperatures can heighten visibility as there are fewer particulates in the air.
Summer: Wildfires in nearby areas can sometimes elevate the AQI above 50, making air quality moderate. High temperatures around 68°F (20°C) can contribute to a hazier atmosphere on some days.
Real-Time Tracking
Several platforms provide real-time AQI data. This can help residents plan outdoor activities safely.
Tracking AQI regularly can aid in making healthier lifestyle decisions, such as engaging in outdoor activities when the air quality is at its best.
Topography of Berkeley, California
Berkeley, California features a diverse topography that includes both hilly and flat areas.
The city’s terrain ranges from sea level at the western shoreline to higher elevations as you move eastward into the Berkeley Hills.
The Berkeley Hills rise prominently in the east, reaching elevations of over 1,000 feet.
These hills provide scenic views and are a notable feature in the city’s landscape. The highest point in Berkeley is Grizzly Peak, standing at around 1,754 feet.
The flatlands in the western part of Berkeley are closer to San Francisco Bay.
This area includes the central business district and many residential neighborhoods. The elevation here is much lower, mostly staying close to sea level.
Berkeley’s climate is often described as Mediterranean, which is influenced by its topography and proximity to the ocean.
The hills can experience slightly cooler temperatures than the flatlands due to elevation changes and fog patterns.
A key geographic feature is the Hayward Fault, which runs through the eastern part of the city.
This active fault line influences the geology and requires consideration in local building codes.
To visualize the topography:
| Area | Elevation |
|---|---|
| Western Flatlands | 0-100 feet |
| Berkeley Hills | 500-1,754 feet |
The range of elevations and the mix of flat and hilly landscapes contribute to Berkeley’s unique and varied topography.
For more details, visit the Berkeley topographic map.
Extreme Weather Events that Occur in Berkeley, California
Berkeley, California experiences its share of extreme weather events. Though the climate is generally mild, certain events can disrupt daily life.
Heatwaves
Heatwaves are becoming more common in Berkeley.
High temperatures can soar above 90°F. Such heat is unusual for the area and can pose health risks, especially to seniors and children.
Wildfires
Wildfires are a significant concern, especially during the dry season.
Winds can carry smoke from nearby forest fires, affecting air quality. This can lead to respiratory issues and other health problems for residents.
Heavy Rainfall
Heavy rainfall can cause flash flooding and mudslides.
These events usually happen during the winter months and can lead to road closures and property damage.
Unusual Cold Spells
While rare, Berkeley can experience cold spells.
Temperatures can dip below 40°F, which is quite cold for the Bay Area. These cold spells can lead to frost and affect local agriculture.
Data Table
| Event | Typical Impact |
|---|---|
| Heatwaves | Health risks, high temp. |
| Wildfires | Air quality issues |
| Heavy Rainfall | Flash flooding, mudslides |
| Cold Spells | Frost, agricultural impact |
Resources
For more detailed information, you can visit the Berkeley Weather Records and Climate and Average Weather Year Round in Berkeley pages.
Best Time of the Year to Visit Berkeley, California
Berkeley’s climate varies by season, offering different experiences throughout the year. The best time to visit depends on what activities you enjoy and what type of weather you prefer.
What is Berkeley, California Like in Spring
Spring in Berkeley spans from March to May.
The weather is mild and temperatures range from the low 50s to the mid-60s °F. This season sees moderate rainfall, usually around 1-2 inches per month.
Flowers bloom across parks and gardens, making it a great time for outdoor activities like hiking and picnicking.
Daylight saving time begins in March, which means longer evenings to enjoy the scenic views.
Berkeley’s springs are generally dry, so it’s an ideal time for those who prefer cooler weather without summer crowds.
What is Berkeley, California Like in Summer
Summer months, from June to August, are warm but seldom hot.
Highs range between 70°F and 76°F, while lows are around 54-58°F.
This season is perfect for warm-weather activities like visiting the marina or the University of California Botanical Garden.
Berkeley sees less rain in the summer, with most months experiencing less than an inch.
It’s an ideal time for outdoor festivals, street fairs, and farmers markets. The weather is generally consistent, making summer one of the best times to explore the area comfortably.
What is Berkeley, California Like in Fall
Fall lasts from September to November.
September is usually the warmest month, with temperatures still reaching up to 76°F.
By November, it cools down to highs in the 60s. The weather is typically dry at the beginning of the season but starts to see more rainfall (about 1-2 inches) by November.
Fall is also a great time to enjoy Berkeley’s vibrant foliage.
As the temperatures drop, the city becomes quieter. It’s an excellent opportunity for those who prefer fewer crowds and cooler weather.
What is Berkeley, California Like in Winter
Winter in Berkeley covers December through February. These are the coolest months, with highs ranging from 57°F to 60°F and lows dipping into the 40s.
Rainfall is more common, averaging around 2-4 inches per month.
Although it’s winter, temperatures generally stay above freezing, making it favorable for indoor activities like visiting museums, theaters, and dining in restaurants.
The winter months also offer a chance to experience Berkeley’s holiday events and festivities.