37.620°N, 122.366°W · station SFOthr · 82 years of record
83°F
HOTTEST OCT 17 SINCE 2020
forecast high · Oct 17
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
#4 / 81
warmest Oct 17 in 81 yrs of record
Warmest Oct 17 ever
94°F
set in 2020
Coolest Oct 17 ever
56°F
set in 1949
Forecast high 83°F — 4th warmest Oct 17 of 81 years · record 94°F (2020) · warmest since 2020.
Ranks
#51 / 81
warmest Oct 18 in 81 yrs of record
Warmest Oct 18 ever
91°F
set in 2020
Coolest Oct 18 ever
54°F
set in 1949
Forecast high 68°F — 51st warmest Oct 18 of 81 years · record 91°F (2020) · warmest since 2025.
Ranks
#72 / 81
warmest Oct 19 in 81 yrs of record
Warmest Oct 19 ever
88°F
set in 2023
Coolest Oct 19 ever
57°F
set in 1985
Forecast high 64°F — 72nd warmest Oct 19 of 81 years · record 88°F (2023) · warmest since 2025.
Ranks
#70 / 80
warmest Oct 20 in 80 yrs of record
Warmest Oct 20 ever
89°F
set in 1991
Coolest Oct 20 ever
59°F
set in 1961
Forecast high 64°F — 70th warmest Oct 20 of 80 years · record 89°F (1991) · warmest since 2025.
Ranks
#48 / 81
warmest Oct 21 in 81 yrs of record
Warmest Oct 21 ever
82°F
set in 1964
Coolest Oct 21 ever
57°F
set in 2001
Forecast high 67°F — 48th warmest Oct 21 of 81 years · record 82°F (1964) · warmest since 2025.
Ranks
#56 / 81
warmest Oct 22 in 81 yrs of record
Warmest Oct 22 ever
87°F
set in 2019
Coolest Oct 22 ever
60°F
set in 1947
Forecast high 65°F — 56th warmest Oct 22 of 81 years · record 87°F (2019) · warmest since 2025.
Ranks
#55 / 81
warmest Oct 23 in 81 yrs of record
Warmest Oct 23 ever
90°F
set in 1959
Coolest Oct 23 ever
56°F
set in 2002
Forecast high 65°F — 55th warmest Oct 23 of 81 years · record 90°F (1959) · 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 Oct 15.
Record Highs in 2026
12 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
4 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: 72°F · forecast is +11° 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 Oct 17 each year, so you can see whether 2026 is running hot. Pick a threshold:
4 days ≥90°F so far in 2026 — tied for the 29th most in 82 years. Normal for this point: 4. Record: 12 in 1984.
Share Card
A ready-to-share summary of San Francisco Airport's outlook — post it, or link this page.
