San Francisco in Summer — Weather & What to Expect
Summer in San Francisco (June, July, August) averages daytime highs of 18.6°C and lows of 13.5°C, with around 2.8mm of rain across the season (0 rainy days in total). It includes some of the best months of the year to visit (June, July, August).
In the northern hemisphere, summer in San Francisco covers June, July, August.
Summer in San Francisco month by month
| Month | High | Low | Rain | Rainy days | Rating |
|---|---|---|---|---|---|
| June | 18.1°C | 12.9°C | 2.5mm | 0 | 10/10 |
| July | 18.0°C | 13.1°C | 0.1mm | 0 | 10/10 |
| August | 19.8°C | 14.5°C | 0.2mm | 0 | 10/10 |
What to pack for San Francisco in summer
- Warm layers
- Light jacket or fleece
- Comfortable walking shoes
Frequently Asked Questions
Is summer a good time to visit San Francisco?
Summer in San Francisco rates around 10/10 — excellent time to visit. Average highs are 18.6°C with 2.8mm of rain across the season.
How hot is San Francisco in summer?
Daytime highs average 18.6°C (65.5°F) across June, July, August, with nights around 13.5°C.
What months are summer in San Francisco?
San Francisco is in the northern hemisphere, so summer covers June, July, August.
See also: best time to visit San Francisco · San Francisco annual climate · San Francisco in spring · San Francisco in autumn · San Francisco in winter
Compare Hertz, Avis, Budget, Sixt and 800+ rental companies — book now, pay at pickup.
Compare car hire prices → Affiliate link — we earn a commission at no extra cost to youAs an Amazon Associate we earn from qualifying purchases. We also earn commission from other retail partners. Links below are affiliate links.
Once you know what summer in San Francisco looks like, find out exactly what to pack for San Francisco at 247PackingList. For currency, language and country facts, see the United States guide at 247CountryInfo.
Summer in San Francisco — what to pack
Travel clothing layers
Pack layers — temperatures can vary significantly between day and night.
Check Price →Check clothing sizes in United States at 247Sizing before you shop.
More summer travel essentials
Last updated:
Climate data sourced from Open-Meteo (open source, open data licence). Monthly averages calculated from 2020–2023 historical data. Weather can be unpredictable — always check a live forecast before travelling.