United States · 37.77°N 122.42°W · monthly climate normals, judged against the Warm preset (mean 14–24 °C57–75 °F, dry or showers)
The best time to visit San Francisco is April to October, when mean temperatures run from 14 °C57 °F to 19 °C66 °F and rainfall stays below 60 mm2.4 in a month.
The rainy season runs November to March, and January to February is a true monsoon — 144–168 mm5.7–6.6 in a month, peaking in January at 168 mm6.6 in. September is the hottest month at 19 °C66 °F and January the coldest at 10 °C50 °F.
Figures are 30-year monthly averages (WorldClim 2.1 monthly normals 1970–2000) for the 0.25° grid cell at 37.77, -122.42 — a climate guide, not a forecast.
Pick the weather you like and every month is judged against it — temperature above the month names, rain below.
Good time to go for a Warm holiday: April to October.
Open San Francisco on the interactive map ↗ the same verdict for every place on Earth, any month
Reading the chart. Gold is good: the month fits what you picked. Any other colour names the reason it doesn't — the temperature bar can be too cold or too hot, the rain bar too dry, too rainy or monsoon. A faded gold bar is a half that fits while the other half fails; a gold month name means both fit.
What the verdicts mean. Temperature is the monthly mean, judged against the preset's band (mean 14–24 °C57–75 °F for Warm). Rain is judged by each month's class within San Francisco's own year rather than raw millimetres: dry under 60 mm2.4 in, showers 60–100 mm2.4–3.9 in, rainy from 100 mm3.9 in and 35 % of the wettest month. Too rainy is a rainy-season month the preset doesn't allow. Monsoon is the heaviest kind of rainy season — 180 mm7.1 in or more (120 mm4.7 in near the yearly peak) in a climate whose wettest month is at least three times its driest — so every monsoon month is rainy season too; the label says which kind. Full rules on the method page.
| Month | Rain | Mean | Season | Warm verdict |
|---|---|---|---|---|
| January | 1686.6 | 1049 | monsoon | too cold |
| February | 1445.7 | 1253 | monsoon | too cold |
| March | 1204.7 | 1355 | rainy | too cold |
| April | 481.9 | 1457 | dry | good |
| May | 160.6 | 1660 | dry | good |
| June | 80.3 | 1864 | dry | good |
| July | 00 | 1965 | dry | good |
| August | 00 | 1965 | dry | good |
| September | 80.3 | 1966 | dry | good |
| October | 401.6 | 1763 | dry | good |
| November | 1124.4 | 1355 | rainy | too cold |
| December | 1285.0 | 1050 | rainy | too cold |
| Looking for | Rule | Months that fit |
|---|---|---|
| Warm | mean 14–24 °C57–75 °F, dry or showers | April to October |
| Tropical | mean 24–33 °C75–91 °F, anything but the monsoon | |
| Beach | mean 24–33 °C75–91 °F, dry or showers | |
| Cool | mean 0–14 °C32–57 °F, anything but the monsoon | November to December and March |
| Snow | mean below 0 °C32 °F, any rain |
Yes. The rainy season runs November to March, and January to February is a true monsoon — 144–168 mm5.7–6.6 in a month, peaking in January at 168 mm6.6 in. Outside it, April to October is dry.
September is the hottest month at 19 °C66 °F and January the coldest at 10 °C50 °F. Annual rainfall totals about 792 mm31 in.
The nearest destinations that do fit the Warm preset in the months San Francisco doesn't:
The interactive map colours the whole world by how it fits your picks in any month, and shows this chart for any place you tap.