Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at San Francisco. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at San Francisco, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
40.6 C (105.1 F)
-1.1 C (30.0 F)
n/a
n/a
Feb
45.0 C (113.0 F)
-1.1 C (30.0 F)
n/a
n/a
Mar
50.0 C (122.0 F)
0.6 C (33.1 F)
n/a
n/a
Apr
50.0 C (122.0 F)
0.6 C (33.1 F)
n/a
n/a
May
46.7 C (116.1 F)
5.6 C (42.1 F)
n/a
n/a
Jun
45.6 C (114.1 F)
8.9 C (48.0 F)
n/a
n/a
Jul
48.9 C (120.0 F)
11.7 C (53.1 F)
n/a
n/a
Aug
48.9 C (120.0 F)
10.0 C (50.0 F)
n/a
n/a
Sep
45.6 C (114.1 F)
6.7 C (44.1 F)
n/a
n/a
Oct
43.9 C (111.0 F)
0.6 C (33.1 F)
n/a
n/a
Nov
40.6 C (105.1 F)
0.6 C (33.1 F)
n/a
n/a
Dec
42.8 C (109.0 F)
-3.3 C (26.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at San Francisco still stand. 2008 holds the most, with 159.
Standing records at San Francisco by the year they were set
Year set
Standing records
1979
48
1980
49
1981
24
1982
65
1983
60
1984
45
1985
60
1986
32
1987
42
1988
63
1989
44
1990
56
1991
36
1992
20
1993
32
1994
37
1995
40
1996
24
1997
11
1998
11
1999
26
2000
30
2001
43
2002
60
2003
22
2004
32
2005
29
2006
25
2007
134
2008
159
2009
105
Wettest Day of Each Month
Jun: 362.0 mm (14.3 in)
The wettest day on record for each calendar month at San Francisco. The most was 362.0 mm (14.3 in) on 29 June 1991.
Record daily precipitation for each month at San Francisco
Month
Record daily precipitation (mm)
Date
Jan
59.9 mm (2.4 in)
30 January 1984
Feb
53.8 mm (2.1 in)
25 February 1983
Mar
74.9 mm (2.9 in)
10 March 1997
Apr
74.9 mm (2.9 in)
6 April 1991
May
91.9 mm (3.6 in)
25 May 2007
Jun
362.0 mm (14.3 in)
29 June 1991
Jul
199.9 mm (7.9 in)
19 July 2005
Aug
87.9 mm (3.5 in)
16 August 1988
Sep
105.9 mm (4.2 in)
1 September 1990
Oct
95.0 mm (3.7 in)
31 October 2002
Nov
69.9 mm (2.8 in)
16 November 2001
Dec
72.9 mm (2.9 in)
2 December 1979
Period of Record Coverage
1979 to 2009
Complete yearUnder 90 percent of days
31 years of record at San Francisco, 1979 to 2009. 7 years have data for under 90 percent of days and are left out of rankings: 1985, 1987, 1988, 1989, 1997, 1998, 2009.
Cooler than the station meanWarmer than the station mean
One stripe for each of 20 complete years at San Francisco, 1979 to 2008. Blue stripes are years cooler than the station's own mean of 24.0 C (75.2 F); red stripes are warmer. The coolest year was 1983, at 21.7 C (71.1 F), and the warmest was 1995, at 27.6 C (81.7 F). The strongest colour marks a difference of 3.6 C (6.5 F).
Annual mean temperature at San Francisco as warming stripes, 1979 to 2008
Year
Annual mean temperature
Difference from the station mean
1979
22.6 C
-1.42 C
1980
22.3 C
-1.67 C
1981
22.7 C
-1.29 C
1982
22.8 C
-1.22 C
1983
21.7 C
-2.28 C
1984
22.9 C
-1.09 C
1986
22.0 C
-2.03 C
1990
24.4 C
+0.39 C
1993
24.6 C
+0.61 C
1994
27.3 C
+3.24 C
1995
27.6 C
+3.58 C
1996
26.2 C
+2.20 C
1999
23.5 C
-0.53 C
2000
24.8 C
+0.81 C
2001
24.3 C
+0.31 C
2002
24.8 C
+0.80 C
2004
23.4 C
-0.64 C
2005
23.9 C
-0.16 C
2006
24.3 C
+0.25 C
2008
24.1 C
+0.08 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.
Extremes by Year
1979 to 2009
Yearly extremes at San Francisco: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
50.0 C (122.0 F)
2008
41.7 C (107.1 F)
31
Coldest night (TNn)
-3.3 C (26.1 F)
1983
0.6 C (33.1 F)
31
Wettest day (Rx1day)
362.0 mm (14.3 in)
1991
67.8 mm (2.7 in)
31
Wettest five days (Rx5day)
470.8 mm (18.5 in)
1991
114.6 mm (4.5 in)
31
Longest dry spell (CDD)
194 days
1998
55 days
31
Hottest day (TXx)
The hottest day of the year at San Francisco, 1979 to 2009. The record is 50.0 C (122.0 F) in 2008, marked on the chart; the median year is 41.7 C (107.1 F).
Hottest day (TXx) at San Francisco by year
Year
Hottest day (TXx)
1979
40.0 C (104.0 F)
1980
45.0 C (113.0 F)
1981
38.9 C (102.0 F)
1982
42.8 C (109.0 F)
1983
42.8 C (109.0 F)
1984
45.0 C (113.0 F)
1985
40.0 C (104.0 F)
1986
40.6 C (105.1 F)
1987
40.0 C (104.0 F)
1988
46.7 C (116.1 F)
1989
41.7 C (107.1 F)
1990
43.9 C (111.0 F)
1991
40.0 C (104.0 F)
1992
40.0 C (104.0 F)
1993
40.0 C (104.0 F)
1994
42.8 C (109.0 F)
1995
41.7 C (107.1 F)
1996
41.7 C (107.1 F)
1997
42.8 C (109.0 F)
1998
41.7 C (107.1 F)
1999
42.8 C (109.0 F)
2000
45.0 C (113.0 F)
2001
41.7 C (107.1 F)
2002
45.6 C (114.1 F)
2003
40.6 C (105.1 F)
2004
42.8 C (109.0 F)
2005
41.7 C (107.1 F)
2006
40.0 C (104.0 F)
2007
45.6 C (114.1 F)
2008
50.0 C (122.0 F)
2009
48.9 C (120.0 F)
Coldest night (TNn)
The coldest night of the year at San Francisco, 1979 to 2009. The record is -3.3 C (26.1 F) in 1983, marked on the chart; the median year is 0.6 C (33.1 F).
Coldest night (TNn) at San Francisco by year
Year
Coldest night (TNn)
1979
0.6 C (33.1 F)
1980
0.6 C (33.1 F)
1981
0.6 C (33.1 F)
1982
-1.1 C (30.0 F)
1983
-3.3 C (26.1 F)
1984
0.6 C (33.1 F)
1985
-1.1 C (30.0 F)
1986
1.7 C (35.1 F)
1987
1.7 C (35.1 F)
1988
0.0 C (32.0 F)
1989
0.0 C (32.0 F)
1990
3.9 C (39.0 F)
1991
5.6 C (42.1 F)
1992
5.0 C (41.0 F)
1993
2.8 C (37.0 F)
1994
5.0 C (41.0 F)
1995
5.0 C (41.0 F)
1996
2.8 C (37.0 F)
1997
0.0 C (32.0 F)
1998
0.0 C (32.0 F)
1999
0.6 C (33.1 F)
2000
0.6 C (33.1 F)
2001
0.6 C (33.1 F)
2002
0.0 C (32.0 F)
2003
0.0 C (32.0 F)
2004
0.0 C (32.0 F)
2005
0.6 C (33.1 F)
2006
0.0 C (32.0 F)
2007
0.6 C (33.1 F)
2008
0.0 C (32.0 F)
2009
0.6 C (33.1 F)
Wettest day (Rx1day)
The wettest day of the year at San Francisco, 1979 to 2009. The record is 362.0 mm (14.3 in) in 1991, marked on the chart; the median year is 67.8 mm (2.7 in).
Wettest day (Rx1day) at San Francisco by year
Year
Wettest day (Rx1day)
1979
72.9 mm (2.9 in)
1980
58.9 mm (2.3 in)
1981
58.9 mm (2.3 in)
1982
63.8 mm (2.5 in)
1983
71.9 mm (2.8 in)
1984
59.9 mm (2.4 in)
1985
67.8 mm (2.7 in)
1986
49.8 mm (2.0 in)
1987
64.8 mm (2.6 in)
1988
105.9 mm (4.2 in)
1989
57.9 mm (2.3 in)
1990
105.9 mm (4.2 in)
1991
362.0 mm (14.3 in)
1992
66.8 mm (2.6 in)
1993
34.8 mm (1.4 in)
1994
74.9 mm (2.9 in)
1995
74.9 mm (2.9 in)
1996
49.8 mm (2.0 in)
1997
74.9 mm (2.9 in)
1998
49.8 mm (2.0 in)
1999
57.4 mm (2.3 in)
2000
54.9 mm (2.2 in)
2001
69.9 mm (2.8 in)
2002
95.0 mm (3.7 in)
2003
73.9 mm (2.9 in)
2004
67.8 mm (2.7 in)
2005
199.9 mm (7.9 in)
2006
63.8 mm (2.5 in)
2007
91.9 mm (3.6 in)
2008
91.9 mm (3.6 in)
2009
40.9 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at San Francisco, 1979 to 2009. The record is 470.8 mm (18.5 in) in 1991, marked on the chart; the median year is 114.6 mm (4.5 in).
Wettest five days (Rx5day) at San Francisco by year
Year
Wettest five days (Rx5day)
1979
173.6 mm (6.8 in)
1980
109.4 mm (4.3 in)
1981
117.2 mm (4.6 in)
1982
137.4 mm (5.4 in)
1983
127.8 mm (5.0 in)
1984
86.1 mm (3.4 in)
1985
105.7 mm (4.2 in)
1986
86.6 mm (3.4 in)
1987
114.6 mm (4.5 in)
1988
137.7 mm (5.4 in)
1989
70.6 mm (2.8 in)
1990
154.4 mm (6.1 in)
1991
470.8 mm (18.5 in)
1992
86.6 mm (3.4 in)
1993
92.3 mm (3.6 in)
1994
106.6 mm (4.2 in)
1995
174.5 mm (6.9 in)
1996
99.6 mm (3.9 in)
1997
166.3 mm (6.5 in)
1998
144.3 mm (5.7 in)
1999
114.5 mm (4.5 in)
2000
55.7 mm (2.2 in)
2001
73.4 mm (2.9 in)
2002
225.6 mm (8.9 in)
2003
91.7 mm (3.6 in)
2004
70.6 mm (2.8 in)
2005
200.7 mm (7.9 in)
2006
135.8 mm (5.3 in)
2007
129.8 mm (5.1 in)
2008
225.3 mm (8.9 in)
2009
56.6 mm (2.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at San Francisco, 1979 to 2009. The record is 194 days in 1998, marked on the chart; the median year is 55 days.
Longest dry spell (CDD) at San Francisco by year
Year
Longest dry spell (CDD)
1979
44 days
1980
103 days
1981
70 days
1982
82 days
1983
72 days
1984
76 days
1985
60 days
1986
64 days
1987
33 days
1988
33 days
1989
59 days
1990
104 days
1991
49 days
1992
46 days
1993
44 days
1994
56 days
1995
68 days
1996
120 days
1997
65 days
1998
194 days
1999
80 days
2000
46 days
2001
53 days
2002
42 days
2003
41 days
2004
37 days
2005
47 days
2006
53 days
2007
32 days
2008
55 days
2009
51 days
Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.
Download the Data
Data for San Francisco standing records by year: CSV or JSON. Field meanings are on the data page.
Data for San Francisco threshold days by year: CSV or JSON. Field meanings are on the data page.
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-16 (16 October 2026). Records are computed by this site and are not official.