San Francisco in April
In April, San Francisco averages 18°C (64°F) during the day and 11°C (52°F) at night, with around 6 days of rain (30 mm total).
High seasonConditions are comfortable for sightseeing without being sweltering. Occasional showers are likely but won't dominate.
April is a great month to visit San Francisco: pleasant temperatures and relatively few wet days.
How April compares to the rest of the year in San Francisco
April is in the middle of the year for warmth in San Francisco (7th of 12) and moderately rainy compared to the rest of the year (6th of 12). Daytime temperature runs 1°C below the annual average (19°C). April runs 1°C warmer than March (17°C) and warms a further 1°C into May (19°C).
April sunrise & sunset in San Francisco
Times shown for San Francisco local time (America/Los_Angeles), calculated for the 15th of April. They shift by a few minutes day to day across the month.
Photography light in San Francisco — April
Golden-hour and blue-hour windows for the 15th of April, in San Francisco's local time. Use these for soft warm light (golden) or cool architectural twilight (blue).
📅 When to book — San Francisco in April
Travel writers usually only tell you when to go. Here's when to book flights and lodging for the best mix of price and availability, based on April's tier (High season) and San Francisco's popularity.
Crowds & pricing — April in San Francisco
This is a busy month in San Francisco — not the absolute peak, but tourist numbers are clearly elevated. You'll feel it at headline attractions on weekends and in the historic centre, though side streets and lesser-known sights stay manageable. Prices are above off-season but not at their summit. A good week for first-time visitors who want everything open without the worst of the crush.
Why this tier: excellent tourism weather
Sun & mosquito risk — April in San Francisco
UV is a clear-sky sea-level estimate — clouds, altitude, and reflective surfaces (snow, water) shift it ±30%. Mosquito risk is climate-derived only; for current disease advisories (dengue, malaria, zika) check the CDC or WHO travel pages before your trip.
San Francisco in other months
| Month | Avg high | Avg low | Rainfall | Rain days | Snow days |
|---|---|---|---|---|---|
| January | 14°C / 57°F | 8°C / 46°F | 110 mm | 11 | — |
| February | 15°C / 59°F | 9°C / 48°F | 110 mm | 10 | — |
| March | 17°C / 63°F | 10°C / 50°F | 75 mm | 10 | — |
| April | 18°C / 64°F | 11°C / 52°F | 30 mm | 6 | — |
| May | 19°C / 66°F | 12°C / 54°F | 10 mm | 3 | — |
| June | 21°C / 70°F | 13°C / 55°F | 5 mm | 1 | — |
| July | 22°C / 72°F | 14°C / 57°F | 0 mm | 0 | — |
| August | 23°C / 73°F | 14°C / 57°F | 1 mm | 1 | — |
| September | 24°C / 75°F | 14°C / 57°F | 5 mm | 2 | — |
| October | 22°C / 72°F | 13°C / 55°F | 20 mm | 4 | — |
| November | 18°C / 64°F | 11°C / 52°F | 55 mm | 7 | — |
| December | 14°C / 57°F | 8°C / 46°F | 85 mm | 9 | — |
Other cities with similar April weather
🌍 See the full ranked list of climate twins for San Francisco in April →
Frequently asked questions
How hot is San Francisco in April?
In April, San Francisco averages a high of 18°C (64°F) and a low of 11°C (52°F) — generally mild and pleasant.
Does it rain a lot in San Francisco in April?
April sees occasional rain in San Francisco, with about 6 rainy days on average.
Is April a good time to visit San Francisco?
April is mild and pleasant. It suits travelers who are comfortable with mild and pleasant weather; check the month-by-month ranking to compare it against the rest of the year.
What should I pack for San Francisco in April?
Pack light layers for warm days and cooler evenings. See the full April packing list for San Francisco for a complete, climate-based checklist.
Check the live 10-day forecast and sunrise/sunset.