San Francisco Weather in April
April in San Francisco typically sees daytime highs of 18°C (64°F) and nighttime lows of 10°C (50°F). Expect some rainfall during the month.
Rainfall in San Francisco in April
Based on our climate data of the past 30 years, about 7 days of rain are anticipated, with 45 mm (1.8 in) on average. Expect a fairly normal spread of rainfall this month, with no particular pattern of very heavy or very persistent showers.
Temperature in San Francisco in April
In April, San Francisco gets moderate temperatures, with highs of 18°C (64°F). Nights cool to around 10°C (50°F). Conditions are often most pleasant around the middle of the day. At 10°C (50°F) overnight, it gets properly cold after dark. On the bright side, cold nights tend to make for excellent sleeping conditions.
Sunshine in San Francisco in April
With approximately 310 hours of sunshine, the days are filled with clear skies. It makes it a perfect month for being outside.
Wind Speed in San Francisco in April
Wind speeds average 6 m/s (12 knots) during April. 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 April
At 13°C (55°F), the water is cool but manageable for those who don't mind a bit of a shock getting in. Most people adjust after a few minutes.If you prefer dry days with pleasant temperatures, May, June, July, August, September and October typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
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 April
Min Temperature
10°C (50°F)
Max Temperature
18°C (64°F)
Water Temperature
13°C (55°F)
Chance of Rain
24%
Precipitation
45 mm (1.8 in)
Rainy days
7 days
Humidity
72%
Windspeed
6 m/s (12 knots)
Sunshine
310 hours
Percentage Sunshine
78%
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in San Francisco typically stay consistent throughout April, with daily highs averaging around 18°C (64°F). Nights are cool, with lows around 10°C (50°F).
Average temperatures in April
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 April
Historical weather for San Francisco in April
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 April
The extremes listed below come from historical weather data collected in San Francisco from 1976 through 2026.
- San Francisco recorded its highest April temperature of 33°C (91°F) on April 20, 2009.
- The coldest April day was on April 8, 1999, with a maximum of 10°C (50°F).
- San Francisco registered its coldest April night on April 1, 1976, with temperatures dropping to 3°C (37°F).
Best Places in the United States of America in April
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 April →
perfect weather
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tolerable
unpleasant
poor
What to Wear in San Francisco in April
Pleasant temperatures in April mean you can pack light but flexibel pieces. Think cotton t-shirts, comfortable walking shorts, and one warmer layer for evenings. A light sweater or denim jacket works well. Rain gear is recommended, you can expect wet weather on multiple days. With water temperatures around 13°C (55°F), the water is quite cold for swimming. You can skip the swimwear unless you're particularly tough. And with plenty of sunshine hours, don’t forget sunglasses, sunscreen, and maybe a sun hat.What To Do in San Francisco in April
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.
