San Francisco Weather in August
August is one of the perfect months to visit San Francisco, with daytime temperatures of 22°C (72°F) and lows of 14°C (57°F) at night. Rainfall is minimal, averaging just 0.7 mm (0.03 in) for the month.
Rainfall in San Francisco in August
You can expect rain on around a single day based on historical patterns, with 0.7 mm (0.03 in) average for the month. On the rare occasion it rains this month, it usually amounts to very little.
Temperature in San Francisco in August
August is a good time to be in San Francisco. Days are perfect, reaching 22°C (72°F), with nights around 14°C (57°F). A light jacket or extra layer can be useful, especially outside the warmest hours of the day. With overnight lows of 14°C (57°F), evenings can feel noticeably cooler than the daytime. An extra layer is a good idea, though the cool air makes for a good night's sleep.
Sunshine in San Francisco in August
The city usually sees around 288 hours of sunlight, indicating many sunny days — a great month for sightseeing.
Wind Speed in San Francisco in August
Wind speeds average 6 m/s (12 knots) during August. At this speed, expect strong winds that make large branches move and create some resistance when walking. Since this is an average, some days have fresh winds while others have strong breezes that can make umbrellas tricky to control.
Average water temperature in August
The water temperature is 14°C (57°F) — chilly, but perfectly fine for a swim if you're not too sensitive to cold water. A short wetsuit can make longer sessions more comfortable.So this is a great month to visit if you prefer dry days with pleasant temperatures.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our San Francisco's climate page.
San Francisco Temperature in August
Min Temperature
14°C (57°F)
Max Temperature
22°C (72°F)
Water Temperature
14°C (57°F)
Chance of Rain
3%
Precipitation
0.7 mm (0.03 in)
Rainy days
a single day
Humidity
75%
Windspeed
6 m/s (12 knots)
Sunshine
288 hours
Percentage Sunshine
68%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in San Francisco typically stay consistent throughout August, with daily highs averaging around 22°C (72°F). Nights are cool, with lows around 14°C (57°F).
Average temperatures in August
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in August
Historical weather for San Francisco in August
Browse day-by-day weather records for San Francisco spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
San Francisco historical weather extremes in August
Based on 49 years of weather observations (1976-2025), these are the most extreme conditions recorded in San Francisco.
- On August 24, 2010, temperatures climbed to 37°C (99°F), marking the warmest August day on record.
- San Francisco experienced its chilliest August day on August 13, 1980, reaching only 14°C (57°F).
- The lowest overnight temperature recorded in August was 10°C (50°F) (August 12, 1995).
Best Places in the United States of America in August
Find out more about the weather in the United States of America and which places have the best travel conditions in this month. See all of the United States of America in August →
perfect weather
pleasant
tolerable
unpleasant
poor
What to Wear in San Francisco in August
Comfortable temperatures call for an easy wardrobe in August. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. With water temperatures around 14°C (57°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in San Francisco in August
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit the United States of America, check out our San Francisco's climate page.
Temperature Rainfall Sunshine Humidity Wind Speed Water Temp
See the full San Francisco climate overview or explore weather in the United States of America.
