San Francisco Weather in April
United States · Mediterranean climate · Data averaged from 2020-01-01 to 2024-12-31 (5 years)
April in San Francisco sees average temperatures ranging from a low of 9.6°C (49.3°F) to a high of 15.3°C (59.5°F), with a mean of 12.1°C (53.8°F). Compared to the annual average of 13.5°C (56.3°F), this month is 1.4°C cooler than the yearly norm. Precipitation averages 23.0mm, making it approximately 26.0mm drier than the monthly average of 49.0mm. The city receives an average of 11.7 hours of sunshine per day during April, with relative humidity averaging 78.4%. Wind speeds reach an average maximum of 30.4 km/h. For travelers, this month offers a temperature experience in San Francisco, with drier-than-average conditions compared to the rest of the year.
If you're planning outdoor activities in San Francisco, ignore the season — focus on the hour. I hiked Lands End in July at 2pm in a t-shirt and was shivering by 4pm when the fog rolled in. The 5°C temperature swing between coast and bay is real. Best running conditions: September-October, when the marine layer retreats and 22°C hits the city. Pack a windbreaker for any coastal trail, year-round. Marin Headlands is magnificent but windy; aim for 10am-2pm. February-March brings surprisingly green hills and empty trails — my favorite hiking window.
April vs Adjacent Months
| Metric | March | April | May |
|---|---|---|---|
| Mean Temp | 11.1°C (52.0°F) | 12.1°C (53.8°F) | 13.9°C (57.0°F) |
| Rainfall | 95.7mm | 23.0mm | 16.5mm |
| Sunshine | 9.5 hrs | 11.7 hrs | 12.8 hrs |
| Humidity | 77.7% | 78.4% | 76.2% |
| Wind | 28.3 km/h | 30.4 km/h | 31.9 km/h |
| Rainy Days | 12.8 | 4.4 | 4.2 |
Seasonal Context
April falls in Spring in the Northern Hemisphere. Spring is a transitional season with temperatures rising from winter lows. For travelers visiting San Francisco in April, the data indicates mixed conditions based on the combination of temperature, precipitation, and daylight hours.
Frequently Asked Questions
What is the average temperature in San Francisco in April?
The average temperature in San Francisco during April ranges from 9.6°C (49.3°F) to 15.3°C (59.5°F), with a mean of 12.1°C (53.8°F).
How much does it rain in San Francisco in April?
San Francisco receives an average of 23.0mm of precipitation in April, spread across approximately 4.4 rainy days.
What should I pack for San Francisco in April?
Based on April weather data, pack warm layers, a medium jacket, and waterproof outerwear.
Is April a good time to visit San Francisco?
April is a cooler month, suitable for travelers who prefer mild weather and fewer crowds. Pack warm layers and enjoy indoor attractions.
Other Months for San Francisco
Cities with Similar April Climate (Mediterranean)
Data Source: Open-Meteo historical archive (2020-01-01 to 2024-12-31). Daily measurements aggregated into monthly climate normals. Coordinates: 37.77°, -122.42°. Timezone: America/Los_Angeles. Last updated: 2026-07-30.