Last updated: May 6, 2024
Under the Köppen–Geiger climate classification San Francisco features a oceanic climate (Cfb).Temperatures typically range between 22 °C (72 °F) and 24 °C (76 °F) through the year, but rarely can drop to 13 °C (56 °F) or can rise to as high as 35 °C (95 °F).The average annual precipitation amounts to about 2197 mm (86.5 inches) and receives 220 rainy days on the 1 mm (0.04 inches) threshold annually.San Francisco enjoys an average of 3267 hours of sunshine throughout the year, and daylight varies from 11 hours 46 minutes to 12 hours 26 minutes per day.
The warmest months in San Francisco are July, August and September, with daily mean temperatures ranging from 23 to 24 °C (75 - 76 °F) throughout the day. The coldest temperatures usually occur in January, November and December, when daily mean temperatures range from 22 to 23 °C (72 - 73 °F) throughout the day. On average each year, San Francisco experiences 311 days above 25 °C (77.0 °F) and 0 days below 0 °C (32.0 °F).
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Maximum | 32°C (89°F) | 33°C (92°F) | 32°C (91°F) | 32°C (90°F) | 33°C (92°F) | 32°C (90°F) | 33°C (92°F) | 34°C (93°F) | 35°C (95°F) | 32°C (90°F) | 30°C (87°F) | 31°C (88°F) |
Mean maximum | 31°C (87°F) | 31°C (89°F) | 31°C (88°F) | 31°C (88°F) | 31°C (89°F) | 31°C (88°F) | 33°C (91°F) | 34°C (93°F) | 33°C (91°F) | 31°C (89°F) | 29°C (85°F) | 30°C (86°F) |
Average high | 28°C (82°F) | 29°C (84°F) | 28°C (83°F) | 28°C (83°F) | 28°C (83°F) | 29°C (84°F) | 30°C (87°F) | 31°C (87°F) | 29°C (85°F) | 28°C (82°F) | 27°C (81°F) | 28°C (82°F) |
Daily mean | 22°C (73°F) | 23°C (74°F) | 23°C (74°F) | 23°C (74°F) | 23°C (74°F) | 23°C (74°F) | 24°C (76°F) | 24°C (76°F) | 23°C (75°F) | 23°C (73°F) | 22°C (72°F) | 23°C (73°F) |
Average low | 18°C (65°F) | 19°C (66°F) | 19°C (67°F) | 19°C (67°F) | 19°C (67°F) | 19°C (66°F) | 19°C (66°F) | 19°C (66°F) | 19°C (66°F) | 19°C (66°F) | 19°C (66°F) | 19°C (66°F) |
Mean minimum | 15°C (60°F) | 17°C (62°F) | 17°C (63°F) | 17°C (63°F) | 17°C (64°F) | 17°C (64°F) | 17°C (63°F) | 17°C (62°F) | 17°C (63°F) | 16°C (62°F) | 18°C (64°F) | 17°C (62°F) |
Minimum | 13°C (56°F) | 16°C (61°F) | 16°C (62°F) | 16°C (61°F) | 16°C (62°F) | 16°C (60°F) | 17°C (63°F) | 15°C (60°F) | 16°C (62°F) | 15°C (60°F) | 17°C (63°F) | 16°C (61°F) |
Compare temperature, precipitation, sunshine, UV index in San Francisco, Antioquia, Colombia with other places around the world.
San Francisco usually has the most precipitation in April, October and November, with an average of 25 rainy days and 319 mm (12.6 inches) of precipitation per month.The driest months in San Francisco are February, July and August. On average, 83 mm (3.3 inches) of precipitation falls during these months.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Average precipitation mm (inches) | 105 (4.2) | 101 (4.0) | 238 (9.4) | 252 (9.9) | 251 (9.9) | 103 (4.1) | 55 (2.2) | 94 (3.7) | 147 (5.8) | 279 (11.0) | 425 (16.7) | 146 (5.7) |
Average precipitation days (≥ 1 mm) | 14 | 18 | 24 | 21 | 19 | 14 | 8 | 12 | 16 | 25 | 29 | 20 |
The sunniest months in San Francisco are July, August and September, when the sun shines an average of 9 hours 50 minutes a day.Least sunny months in San Francisco: January, May and November receive an average of 8 hours 3 minutes of sunshine daily.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Mean monthly sunshine hours | 245 | 273 | 270 | 260 | 256 | 274 | 310 | 306 | 287 | 257 | 239 | 283 |
Mean daily daylight hours | 11h 48m | 11h 55m | 12h 4m | 12h 14m | 12h 22m | 12h 26m | 12h 24m | 12h 17m | 12h 7m | 11h 58m | 11h 50m | 11h 46m |
San Francisco experiences the highest level of ultraviolet (UV) radiation in March, April and August, when the maximum UV index can reach values of 15 - 17, which corresponds to the Extreme category of sun exposure.June, November and December are in the Extreme exposure category. In these months, the maximum values of the UV index do not exceed 14. For more detailed information, check out our hourly San Francisco UV Index data.
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
UV Index (month maximum) | 14 | 15 | 16 | 17 | 15 | 14 | 14 | 15 | 14 | 14 | 13 | 12 |