Planning a Trip to San Francisco? Here's the Weather
See what weather to expect in San Francisco, United States and plan your trip with confidence. Monthly averages from real historical weather data.
San Francisco's climate is famously stubborn — temperatures barely shift across the year, hovering between 14°C and 21°C, and the city's real seasonal drama plays out in rainfall rather than heat. That mild, steady character makes it a reliable destination for outdoor exploration, whether you're wandering community gardens or lingering over coffee in a neighbourhood café between sights.
Written by Leo Vicente, founder & engineer who loves to travel
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17°C
Avg. high
11°C
Avg. low
607mm
Yearly rainfall
5
Best months
Travel Window Score · 9.4/10
San Francisco's best stretch runs August–September — around 1 rain day a month and daytime highs near 21°C, on a 10-year historical average (climatology tier).
Climatology · 10-YR AVG · How we forecast →
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Start PlanningMonthly Temperature & Rainfall
14°
8°
123mm
Jan
15°
8°
99mm
Feb
15°
9°
104mm
Mar
16°
10°
32mm
Apr
18°
11°
17mm
May
19°
13°
1mm
Jun
19°
13°
0mm
Jul
20°
14°
1mm
Aug
21°
15°
4mm
Sep
21°
13°
31mm
Oct
17°
10°
64mm
Nov
14°
8°
131mm
Dec
What Weather to Expect in San Francisco
San Francisco typically has the most favorable weather for travel during June, July, August, September, October, with comfortable temperatures and relatively low rainfall — ideal conditions for sightseeing and outdoor activities.
Best Time to Visit San Francisco
June through October mark a genuinely drier stretch — July sees virtually no precipitation, and highs reach their peak around 21°C in September — making this the window for waterfront walks, beach visits, and sightseeing without the interruption of rain.
The best time to visit San Francisco is June through October, when daytime highs average around 20°C and rainfall stays low at roughly 7mm per month. These months offer the most comfortable conditions for sightseeing, outdoor activities, and exploring the city at a relaxed pace. July is typically the driest of these months, with only around 0mm of precipitation.
December is the wettest point of the year, with precipitation reaching 131mm, which can put a real damper on outdoor plans.
San Francisco Weather by Season
Spring
Spring (March–May) brings mild weather to San Francisco, with highs averaging 16°C and lows around 10°C. The season is moderately wet, accumulating around 153mm total with roughly 6 rainy days per month.
Summer
Summer (June–August) brings mild weather to San Francisco, with highs averaging 19°C and lows around 13°C. The season is very dry with minimal rainfall, accumulating around 2mm total with roughly 0 rainy days per month.
Autumn
Autumn (September–November) brings mild weather to San Francisco, with highs averaging 20°C and lows around 13°C. The season is relatively dry, accumulating around 99mm total with roughly 4 rainy days per month.
Winter
Winter (December–February) brings cool weather to San Francisco, with highs averaging 14°C and lows around 8°C. The season is quite wet, accumulating around 353mm total with roughly 10 rainy days per month.
Things to do in San Francisco
Handpicked activities you can book now, matched to typical weather in San Francisco.
Itineraries Featuring San Francisco
Climate data is a 10-year historical average (2016–2025), averaged across a wide area rather than a single weather station. Temperatures in Celsius. How we forecast →