37.620°N, 122.366°W · station SFOthr · 82 years of record
73°F
HOTTEST SEP 1 SINCE 2025
forecast high · Sep 1
7-Day Forecast
NWS NDFD forecast high temperature for San Francisco Airport.
This Day in History
Every year's high on each of the next 7 forecast dates at San Francisco Airport — toggle a day below. The forecast line shows where it lands; the ringed bar is the hottest on record.
Ranks
#43 / 81
warmest Sep 1 in 81 yrs of record
Warmest Sep 1 ever
104°F
set in 2017
Coolest Sep 1 ever
62°F
set in 2012
Forecast high 73°F — 43rd warmest Sep 1 of 81 years · record 104°F (2017) · warmest since 2025.
Ranks
#50 / 81
warmest Sep 2 in 81 yrs of record
Warmest Sep 2 ever
104°F
set in 2017
Coolest Sep 2 ever
61°F
set in 1945
Forecast high 71°F — 50th warmest Sep 2 of 81 years · record 104°F (2017) · warmest since 2025.
Ranks
#55 / 81
warmest Sep 3 in 81 yrs of record
Warmest Sep 3 ever
93°F
set in 1961
Coolest Sep 3 ever
61°F
set in 1951
Forecast high 70°F — 55th warmest Sep 3 of 81 years · record 93°F (1961) · warmest since 2025.
Ranks
#55 / 81
warmest Sep 4 in 81 yrs of record
Warmest Sep 4 ever
92°F
set in 1961
Coolest Sep 4 ever
61°F
set in 1962
Forecast high 69°F — 55th warmest Sep 4 of 81 years · record 92°F (1961) · warmest since 2025.
Ranks
#71 / 81
warmest Sep 5 in 81 yrs of record
Warmest Sep 5 ever
97°F
set in 2022
Coolest Sep 5 ever
63°F
set in 1946
Forecast high 67°F — 71st warmest Sep 5 of 81 years · record 97°F (2022) · warmest since 2025.
Ranks
#67 / 81
warmest Sep 6 in 81 yrs of record
Warmest Sep 6 ever
95°F
set in 2022
Coolest Sep 6 ever
63°F
set in 1964
Forecast high 68°F — 67th warmest Sep 6 of 81 years · record 95°F (2022) · warmest since 2025.
Ranks
#51 / 81
warmest Sep 7 in 81 yrs of record
Warmest Sep 7 ever
102°F
set in 2020
Coolest Sep 7 ever
63°F
set in 1962
Forecast high 71°F — 51st warmest Sep 7 of 81 years · record 102°F (2020) · warmest since 2025.
The hottest and coldest ever recorded at San Francisco Airport in each calendar month, and for the whole 1945–2026 record — with the year each was set.
Month
Record High
Record Low
Jan
74°FJan 31, 2015
26°FJan 5, 1949
Feb
78°FFeb 10, 2022
30°FFeb 14, 1949
Mar
89°FMar 20, 2026
31°FMar 3, 1966
Apr
92°FApr 29, 1981
36°FApr 27, 1955
May
97°FMay 27, 1984
39°FMay 3, 1950
Jun
105°FJun 14, 2000
43°FJun 1, 1954
Jul
99°FJul 1, 1985
44°FJul 29, 1951
Aug
99°FAug 24, 2010
45°FAug 30, 1952
Sep
104°FSep 1, 2017
41°FSep 30, 1950
Oct
99°FOct 5, 1987
37°FOct 20, 1949
Nov
85°FNov 1, 1967
31°FNov 30, 1954
Dec
75°FDec 2, 1958
24°FDec 9, 1972
All-time
105°FJun 14, 2000
24°FDec 9, 1972
2026 Records So Far
Records set or tied at San Francisco Airport so far this year — through Aug 30.
Record Highs in 2026
11 broke
plus 1 tied — daily record highs set this year
Monthly high record this year: Mar (89°F)
Record Lows in 2026
0 broke
plus 0 tied — daily record lows set this year
Record Warm Nights & Cold Days
Two more daily records, kept separate from the rankings: the warmest a night has ever stayed (record high minimum) and the coldest a day has ever gotten (record low maximum) — the flip side of the usual record high and low.
Warmest low ever
72°F
record high minimum — the night it never cooled · Sep 2, 2017
Coldest high ever
37°F
record low maximum — the day it never warmed · Dec 9, 1972
Month
Warmest low
Coldest high
Jan
62°FJan 1, 1997
39°FJan 10, 1949
Feb
59°FFeb 7, 2015
41°FFeb 5, 1976
Mar
60°FMar 4, 2016
45°FMar 2, 1976
Apr
62°FApr 21, 2009
49°FApr 28, 1948
May
66°FMay 17, 1997
52°FMay 8, 1963
Jun
67°FJun 14, 2000
56°FJun 2, 1967
Jul
65°FJul 21, 2014
56°FJul 3, 1949
Aug
66°FAug 15, 2020
59°FAug 12, 1945
Sep
72°FSep 2, 2017
59°FSep 16, 1989
Oct
68°FOct 6, 2024
54°FOct 18, 1949
Nov
63°FNov 20, 1950
49°FNov 9, 1982
Dec
59°FDec 22, 1964
37°FDec 9, 1972
All-time
72°FSep 2, 2017
37°FDec 9, 1972
Hot Streaks
Current run
0 days
consecutive days with a high ≥ 90°F
Longest ever
6 days
record run, ended Jun 28 1976
So far in 2026
2 days
days with a high ≥ 90°F this year
Climate Normals
Normal high & low by month, from San Francisco Airport's own 1991–2020 record. Today's normal high: 74°F · forecast is -1° vs normal.
San Francisco Airport's observed daily high for the last six weeks — a white ring marks any day that broke or tied its daily record for that date.
2026 So Far
Every day this year against San Francisco Airport's own record — the record high, the normal, and the full span ever seen. A shareable look at where the year stands.
Each cell is one day's high at San Francisco Airport, coloured by temperature — 82 years of record, so heat waves read as warm streaks and cold snaps as blue.
Days Above the Mark
How many days a year hit a given high at San Francisco Airport — counted through Sep 1 each year, so you can see whether 2026 is running hot. Pick a threshold:
2 days ≥90°F so far in 2026 — tied for the 30th most in 82 years. Normal for this point: 2. Record: 9 in 1976.
Share Card
A ready-to-share summary of San Francisco Airport's outlook — post it, or link this page.
