United States · 37.77°N 122.42°W · 30-year monthly averages, judged against the Warm preset (highs 19–28 °C66–82 °F, dry or showers)
The best time to visit San Francisco is April to October, with highs of 20–25 °C68–77 °F and nights of 9–13 °C48–55 °F, and rainfall of under 60 mm2.4 in a month.
The rainy season is November to March; January to February is a true monsoon, with 144–168 mm5.7–6.6 in a month and a peak in January (168 mm6.6 in). July is the hottest month (highs of 25 °C77 °F) and January the coldest (14 °C57 °F).
The figures are 30-year monthly averages (WorldClim 2.1 monthly normals 1970–2000) for the 0.25° grid cell at 37.77, -122.42. This is a climate guide, not a forecast.
Pick the weather you like. Every month is then 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 verdicts for any place on Earth, in any month
Reading the chart. Gold means good: the month fits what you picked. Any other colour shows the reason it does not. The temperature bar can be too cold or too hot; the rain bar can be too dry, too rainy or monsoon. A faded gold bar means that half fits but the other half does not. A gold month name means both halves fit.
What the verdicts mean. Temperature is the month's average daily high (the afternoon), judged against the preset's band (highs 19–28 °C66–82 °F for Warm). Rain is judged by each month's class within San Francisco's own year, not by raw millimetres: dry under 60 mm2.4 in, showers 60–100 mm2.4–3.9 in, rainy from 100 mm3.9 in and at least 35 % of the wettest month. Too rainy is a rainy-season month that the preset does not 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 where the wettest month has at least three times the rain of the driest. Every monsoon month is also a rainy-season month; the label says which kind. Full rules on the method page.
| Month | Rain | High | Low | Season | Warm verdict |
|---|---|---|---|---|---|
| January | 1686.6 | 1456 | 643 | monsoon | too cold |
| February | 1445.7 | 1661 | 745 | monsoon | too cold |
| March | 1204.7 | 1864 | 846 | rainy | too cold |
| April | 481.9 | 2067 | 947 | dry | good |
| May | 160.6 | 2271 | 1050 | dry | good |
| June | 80.3 | 2474 | 1253 | dry | good |
| July | 00 | 2577 | 1254 | dry | good |
| August | 00 | 2577 | 1355 | dry | good |
| September | 80.3 | 2577 | 1355 | dry | good |
| October | 401.6 | 2373 | 1152 | dry | good |
| November | 1124.4 | 1864 | 846 | rainy | too cold |
| December | 1285.0 | 1457 | 643 | rainy | too cold |
| Looking for | Rule | Months that fit |
|---|---|---|
| Warm | highs 19–28 °C66–82 °F, dry or showers | April to October |
| Tropical | highs 28–38 °C82–100 °F, any rain except monsoon | |
| Beach | highs 28–38 °C82–100 °F, dry or showers | |
| Cool | highs 3–19 °C37–66 °F, any rain except monsoon | November to December and March |
| Snow | highs below 3 °C37 °F, any rain |
Yes. The rainy season is November to March; January to February is a true monsoon, with 144–168 mm5.7–6.6 in a month and a peak in January (168 mm6.6 in). Outside the rainy season, April to October is dry.
July is the hottest month (highs of 25 °C77 °F) and January the coldest (14 °C57 °F). Annual rainfall is about 792 mm31 in.
The nearest destinations that fit the Warm preset in the months when San Francisco does not:
The interactive map colours the whole world by how well it fits the weather you like, in any month, and shows this chart for any place you tap.