San Francisco, California, United States weather records
Record high and low temperatures for San Francisco, California, United States, by month, by season, and all-time, with the dates they occurred, across 1981–2026 of daily climate history. Its hottest day on record reached 102°F on 2020-09-06; its coldest fell to 26°F on 1989-02-06.
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 | 72°F2021-01-17
43°F2002-01-28
|
57°F1995-01-09
31°F1997-01-13
|
| February | 73°F2026-02-28
43°F1989-02-05
|
57°F2015-02-06
26°F1989-02-06
|
| March | 81°F2026-03-18
45°F1985-03-05
|
57°F2026-03-29
34°F2009-03-10
|
| April | 85°F2014-04-30
45°F1982-04-01
|
61°F2019-04-23
35°F1999-04-09
|
| May | 93°F2001-05-30
53°F2011-05-16
|
64°F1997-05-17
41°F2010-05-11
|
| June | 96°F2000-06-14
55°F2011-06-03
|
65°F2019-06-11
44°F1999-06-07
|
| July | 97°F1988-07-17
63°F1999-07-27
|
64°F2006-07-22
48°F1987-07-19
|
| August | 96°F2020-08-14
61°F2000-08-29
|
67°F2020-08-16
50°F1996-08-07
|
| September | 102°F2020-09-06
60°F1981-09-24
|
71°F2017-09-02
49°F1985-09-30
|
| October | 96°F2024-10-06
56°F2003-10-31
|
68°F2024-10-02
42°F1991-10-31
|
| November | 82°F2018-11-01
47°F1985-11-11
|
59°F2018-11-01
33°F1985-11-13
|
| December | 69°F1989-12-04
41°F1990-12-22
|
57°F1996-12-31
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) | 73°F2026-02-28
41°F1990-12-22
|
57°F1995-01-09
26°F1989-02-06
|
| Spring (Mar–May) | 93°F2001-05-30
45°F1985-03-05
|
64°F1997-05-17
34°F2009-03-10
|
| Summer (Jun–Aug) | 97°F1988-07-17
55°F2011-06-03
|
67°F2020-08-16
44°F1999-06-07
|
| Autumn (Sep–Nov) | 102°F2020-09-06
47°F1985-11-11
|
71°F2017-09-02
33°F1985-11-13
|
All-time records
The most extreme value San Francisco has recorded for each metric across its entire history.
High
Low
Feels-like
Humidity
Wind
Precip
For rainfall, the “driest” figure is the longest run of consecutive days without measurable rain, dated to when that dry spell began.