current run under 0.01" · longest ever 210 days (to Oct 16, 2021)
Wet Streak
0days
consecutive days with rain · longest ever 17 days
Year to Date vs Normal
99%
10.74" of a normal 10.81" · wettest 30.22" (1958) · driest 1.89" (2013)
Wettest & Driest Years
The extremes of a 80-year record (1946–2025) — full calendar-year totals. The long-run average is 19.28" a year.
Wettest Years on Record
1
1983
38.34in
2
1998
35.33in
3
1982
34.81in
4
1958
32.29in
5
1973
31.38in
Driest Years on Record
1
2013
3.38in
2
2020
5.86in
3
2015
8.44in
4
1946
8.79in
5
1953
9.2in
Rainfall by Month
The seasonal rhythm — each month's normal precipitation, with this year's totals in blue. Where the blue bar clears the band, the month ran wetter than usual.
J
F
M
A
M
J
J
A
S
O
N
D
Normal (median)This year
Normally wettest in Dec (~3.55") and driest in Jul (~0.0"). Wettest calendar month ever: Feb 1998, 13.64".
This Day in History · Rainfall
Every year's rainfall on each of the next 7 dates at San Francisco Airport — toggle a day below. The tallest bar (ringed) is the wettest on record for that date.
Wettest Jul 28 ever
0.00in
no rain on record
Rain on Jul 28
0%
of 81 years had measurable rain
Wettest Jul 29 ever
0.00in
no rain on record
Rain on Jul 29
0%
of 81 years had measurable rain
Wettest Jul 30 ever
0.03in
set in 1966
Rain on Jul 30
1%
of 81 years had measurable rain
Wettest Jul 31 ever
0.02in
set in 1949
Rain on Jul 31
1%
of 81 years had measurable rain
Wettest Aug 1 ever
0.01in
set in 2022
Rain on Aug 1
1%
of 81 years had measurable rain
Wettest Aug 2 ever
0.00in
no rain on record
Rain on Aug 2
0%
of 81 years had measurable rain
Wettest Aug 3 ever
0.01in
set in 1953
Rain on Aug 3
1%
of 81 years had measurable rain
This Year's Rainfall
San Francisco Airport's cumulative rainfall so far this year against its own record — the normal accumulation, and the wettest & driest years to date. The bright line is the running total; where it rides the band tells the story at a glance.
San Francisco Airport's entire daily record as one heatmap — each row a year, each cell a day, shaded by that day's rainfall. Dry spells read as dark blocks, wet seasons as brighter bands; the whole climate at a glance.
Every week of the U.S. Drought Monitor for San Francisco Airport's county since 2000, coloured by intensity — dry spells and multi-year droughts read as warm bands.
