San Francisco weather records
Record high and low temperatures for San Francisco, by month, by season, and all-time, with the dates they occurred, across 1980–2026 of daily climate history. Its hottest day on record reached 95°F on 2017-09-01; its coldest fell to 27°F on 1990-12-22.
Records by month
The warmest (▲) and coldest (▼) both the daytime high and the overnight low have ever been in each calendar month, so each column shows its record high and its record low. Tap a month for its full averages and typical range.
| Month | Daytime high | Overnight low |
|---|---|---|
| January | 70°F2021-01-18
46°F1997-01-14
|
58°F1980-01-13
35°F1997-01-14
|
| February | 70°F1986-02-26
43°F1989-02-06
|
59°F2016-02-17
31°F1989-02-06
|
| March | 75°F2021-03-31
48°F1985-03-05
|
59°F2016-03-05
38°F2006-03-11
|
| April | 82°F2022-04-07
49°F1982-04-01
|
62°F2004-04-27
41°F1999-04-09
|
| May | 87°F2008-05-15
54°F1991-05-02
|
63°F1997-05-17
45°F1999-05-15
|
| June | 87°F2019-06-10
55°F1999-06-02
|
65°F1993-06-17
47°F1999-06-07
|
| July | 80°F2026-07-14
58°F2010-07-09
|
66°F2015-07-20
50°F1994-07-07
|
| August | 80°F2020-08-14
59°F2008-08-08
|
64°F2020-08-16
51°F1996-08-07
|
| September | 95°F2017-09-01
58°F2006-09-29
|
67°F2017-09-02
50°F2007-09-30
|
| October | 91°F1987-10-05
55°F2013-10-24
|
66°F2020-10-16
45°F2023-10-31
|
| November | 76°F1997-11-02
49°F1985-11-11
|
61°F1981-11-16
39°F2010-11-26
|
| December | 68°F2020-12-07
37°F1990-12-22
|
59°F2014-12-21
27°F1990-12-22
|
Records by season
The warmest (▲) and coldest (▼) both the daytime high and the overnight low have reached in each meteorological season (Northern Hemisphere, each a three-month span).
| Season | Daytime high | Overnight low |
|---|---|---|
| Winter (Dec–Feb) | 70°F1986-02-26
37°F1990-12-22
|
59°F2014-12-21
27°F1990-12-22
|
| Spring (Mar–May) | 87°F2008-05-15
48°F1985-03-05
|
63°F1997-05-17
38°F2006-03-11
|
| Summer (Jun–Aug) | 87°F2019-06-10
55°F1999-06-02
|
66°F2015-07-20
47°F1999-06-07
|
| Autumn (Sep–Nov) | 95°F2017-09-01
49°F1985-11-11
|
67°F2017-09-02
39°F2010-11-26
|
All-time records
The most extreme value San Francisco has recorded for each metric across its entire history.
High
Low
Feels-like
Humidity
Wind
Gust
Precip
For rainfall, the “driest” figure is the longest run of consecutive days without measurable rain, dated to when that dry spell began.