San Francisco County Climate and Average Weather
Climate of San Francisco County: average temperatures, rainfall and seasons month by month.
Climate in San Francisco County month by month
Average high, average low and total rainfall, based on three years of reanalysis data.
| Month | Avg high | Avg low | Rainfall | Rating |
|---|---|---|---|---|
| January | 59° | 46° | 3,3 in | ★★★☆☆ |
| February | 59° | 47° | 5,6 in | ★★★☆☆ |
| March | 64° | 50° | 3,0 in | ★★★★☆ |
| April | 63° | 51° | 2,0 in | ★★★★☆ |
| May | 65° | 52° | 0,6 in | ★★★★★ |
| June | 66° | 54° | 0,0 in | ★★★★★ |
| July | 66° | 56° | 0,1 in | ★★★★★ |
| August | 69° | 57° | 0,0 in | ★★★★★ |
| September | 69° | 58° | 0,2 in | ★★★★★ |
| October | 71° | 56° | 0,7 in | ★★★★★ |
| November | 62° | 50° | 4,1 in | ★★★☆☆ |
| December | 58° | 47° | 5,8 in | ★★★☆☆ |
Climate type: Mediterranean. Source: Open-Meteo archive (ERA5).
Recent extremes in San Francisco County
Highest and lowest readings observed in the last 3 years of reanalysis data - not all-time records.
How San Francisco County compares with nearby places
Annual averages, and the difference against San Francisco County.
| Place | Distance | Avg temp | vs here | Annual rain |
|---|---|---|---|---|
| Area Code 415 | 0 mi | 57°F | about the same | 25 in |
| San Francisco | 0 mi | 57°F | about the same | 25 in |
| ZIP Code 94102 | 0 mi | 57°F | about the same | 25 in |
| Mission District | 1 mi | 57°F | about the same | 25 in |
| ZIP Code 94133 | 2 mi | 57°F | about the same | 25 in |
Best time to visit San Francisco County
Go in May, June, July, August, September and October. These months score highest on comfortable temperatures, low rainfall and useful daylight.
Hardest months: January, February and December - expect the least comfortable mix of heat, cold or rain.
What this means for San Francisco County
Today is warmer than average for August. The forecast high of 78°F is 8.1°F above the 69°F typical for this month.
Rain is very unlikely today - plans do not need a backup.
No weather-related travel disruption is expected today. Roads and airports should run normally.
Northern Hemisphere, so peak summer falls in June to August.
The gap between the warmest and coldest month averages 43°F - an unusually even climate through the year.
What to pack, what to skip
- Sunglasses, a brimmed hat and SPF 30+
- If your dates are flexible, avoid January, February and December - historically the least comfortable months here.
Summary
San Francisco County is a county in California. San Francisco County is a county in the United States. It has a population of about 810.000.
Right now it is 60°F (16°C) in San Francisco County with mainly clear. It feels like 59°F. Today runs from 55°F to 78°F. Chance of precipitation is 2%. Sightseeing conditions score 9.5/10 - excellent - go now.
The best time to visit San Francisco County is May, June, July, August, September and October. The climate is Mediterranean. January, February and December tend to be the least comfortable months. October is the warmest month with average highs near 71°F, while January is the coldest with lows near 46°F.
The closest major airport is San Francisco International Airport (SFO), about 11 mi away. Nearby highlights include Alcatraz Island, Golden Gate Bridge, Point Lobos State Natural Reserve and Pinnacles National Park.
In plain terms. Today is warmer than average for August. The forecast high of 78°F is 8.1°F above the 69°F typical for this month. The best window to be outside is roughly 1 PM to 4 PM, when temperature, rain chance and wind line up best. sightseeing is the strongest bet in San Francisco County today at 9.5/10. No weather-related travel disruption is expected today. Roads and airports should run normally.
Compiled from this page's own data: atlas facts plus live Open-Meteo readings.
Quick facts about San Francisco County
| Type | County |
|---|---|
| State | California |
| Country | United States |
| Continent | North America |
| Coordinates | 37°46′29.6″N 122°25′9.8″W (37.7749, -122.4194) |
| Population | 810.000 |
| Local time | 9:22 AM (UTC-07:00) |
| Best months | May, June, July, August, September and October |
| Climate | Mediterranean |
Weather map for San Francisco County
Animated model layers. Pick a layer to load it.
Animated layers by Windy. For pin-level detail and nearby places, see the interactive map below.
Explore San Francisco County
Every topic we hold for this place, and the same topic for the places around it.
Climate for related places
Frequently asked questions
Where is San Francisco County?
San Francisco County is a county in California. Its coordinates are 37.7749, -122.4194. It lies in North America.
What is the weather like in San Francisco County right now?
It is currently 60°F (16°C) with mainly clear. Humidity is 89% and wind is 8 mph.
When is the best time to visit San Francisco County?
May, June, July, August, September and October offer the most comfortable conditions in San Francisco County, which has a Mediterranean climate. January, February and December are usually the hardest months for outdoor plans.
What time zone is San Francisco County in?
San Francisco County observes America/Los_Angeles (UTC-07:00). The local time is 9:22 AM.
How many people live in San Francisco County?
San Francisco County has a population of approximately 810.000.
What is the nearest airport to San Francisco County?
The closest airports are San Francisco International Airport (SFO), 11 mi away.
What are the top things to do in San Francisco County?
Popular options include Alcatraz Island, Golden Gate Bridge, Point Lobos State Natural Reserve, Pinnacles National Park, Julia Pfeiffer Burns State Park and Emerald Bay State Park.
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| Place data | USPOTUS Atlas dataset (us-counties) - coordinates, hierarchy and facts. |
|---|---|
| Forecast and observations | Open-Meteo (ECMWF and national models). |
| Air quality and pollen | Copernicus CAMS via Open-Meteo. US AQI scale. |
| Climate averages | ERA5 reanalysis via the Open-Meteo archive, aggregated over 3 years. |
| Official alerts | US National Weather Service. |
| Method | Scores, comparisons and advice on this page are computed from the inputs above. Distances are straight-line. Nothing is estimated where data is missing - the block is simply not shown. |
Last updated August 24, 2026 at 9:22 AM local time. Live blocks refresh every 15 minutes; climate averages monthly.
