Almanac · San Francisco Airport, CA · Precipitation Almanac
🌧 Precipitation Almanac

San Francisco Airport, CA

37.620°N, 122.366°W · station SFOthr · 1945–2026 · 82 years · normal 19.7 in/yr

The Accumulation Ribbon

Every day of the year at San Francisco Airport: how the rain adds up. The filled curve is the normal running total; the dashed lines are the wettest (1983) and driest (2013) years on record; the white line is 2026 so far.
5″10″15″20″25″30″35″40″JanFebMarAprMayJunJulAugSepOctNovDecwettestsince.com · driestsince.com
Normal to date Wettest / driest year 2026 so far normal annual 19.7 in

All-Time Extremes

Wettest day ever

5.59in
Jan 4, 1982

Wettest month ever

13.64in
Feb 1998

Wettest year

38.3in
1983 · mean 19.3 in

Driest year

3.4in
2013 · mean 19.3 in

Longest dry streak

210 days
< 0.01 in · ended 2021-10-16

Longest wet streak

17 days
≥ 0.01 in · ended 1995-01-16

Records by Month

MonthWettest dayNormalWettest month
Jan5.59″ Jan 4, 19823.36″11.26″ 1993
Feb2.92″ Feb 2, 19982.62″13.64″ 1998
Mar1.99″ Mar 8, 19782.35″9.01″ 1958
Apr2.30″ Apr 2, 19580.92″6.36″ 1958
May1.53″ May 20, 19570.21″3.81″ 1957
Jun0.81″ Jun 2, 19670.01″1.49″ 2011
Jul0.35″ Jul 2, 19770.00″0.35″ 1977
Aug0.56″ Aug 19, 19970.00″0.66″ 1976
Sep2.29″ Sep 18, 19590.03″2.30″ 1959
Oct4.02″ Oct 24, 20210.45″7.30″ 1962
Nov2.55″ Nov 22, 20241.82″7.94″ 1973
Dec3.67″ Dec 31, 20223.55″12.30″ 1955

Record Daily Rainfall

The heaviest one-day rainfall ever recorded on each calendar date — when San Francisco Airport's big rains fall.
2″4″JanFebMarAprMayJunJulAugSepOctNovDec

Year by Year

1946: 8.8″ (-10.5 vs mean)1947: 10.6″ (-8.7 vs mean)1948: 12.4″ (-6.9 vs mean)1949: 12.7″ (-6.6 vs mean)1950: 21.5″ (+2.2 vs mean)1951: 17.6″ (-1.7 vs mean)1952: 27.5″ (+8.2 vs mean)1953: 9.2″ (-10.1 vs mean)1954: 17.3″ (-2.0 vs mean)1955: 21.4″ (+2.1 vs mean)1956: 15.6″ (-3.7 vs mean)1957: 24.0″ (+4.7 vs mean)1958: 32.3″ (+13.0 vs mean)1959: 13.7″ (-5.6 vs mean)1960: 16.9″ (-2.4 vs mean)1961: 15.8″ (-3.5 vs mean)1962: 24.2″ (+5.0 vs mean)1963: 19.9″ (+0.6 vs mean)1964: 17.5″ (-1.7 vs mean)1965: 21.2″ (+1.9 vs mean)1966: 16.0″ (-3.3 vs mean)1967: 27.3″ (+8.0 vs mean)1968: 18.0″ (-1.3 vs mean)1969: 28.1″ (+8.8 vs mean)1970: 25.7″ (+6.4 vs mean)1971: 9.8″ (-9.5 vs mean)1972: 17.0″ (-2.3 vs mean)1973: 31.4″ (+12.1 vs mean)1974: 15.6″ (-3.7 vs mean)1975: 17.2″ (-2.0 vs mean)1976: 10.0″ (-9.3 vs mean)1977: 12.5″ (-6.7 vs mean)1978: 25.8″ (+6.5 vs mean)1979: 24.6″ (+5.3 vs mean)1980: 18.3″ (-0.9 vs mean)1981: 23.5″ (+4.2 vs mean)1982: 34.8″ (+15.5 vs mean)1983: 38.3″ (+19.1 vs mean)1984: 14.1″ (-5.2 vs mean)1985: 12.6″ (-6.7 vs mean)1986: 20.7″ (+1.4 vs mean)1987: 15.6″ (-3.7 vs mean)1988: 13.7″ (-5.6 vs mean)1989: 11.3″ (-7.9 vs mean)1990: 10.3″ (-8.9 vs mean)1991: 16.0″ (-3.3 vs mean)1992: 20.7″ (+1.4 vs mean)1993: 23.5″ (+4.2 vs mean)1994: 19.3″ (+0.0 vs mean)1995: 27.4″ (+8.1 vs mean)1996: 28.8″ (+9.5 vs mean)1997: 20.4″ (+1.1 vs mean)1998: 35.3″ (+16.0 vs mean)1999: 15.5″ (-3.8 vs mean)2000: 21.6″ (+2.3 vs mean)2001: 26.1″ (+6.9 vs mean)2002: 19.5″ (+0.3 vs mean)2003: 18.7″ (-0.6 vs mean)2004: 19.3″ (+0.0 vs mean)2005: 27.0″ (+7.7 vs mean)2006: 20.6″ (+1.3 vs mean)2007: 11.7″ (-7.6 vs mean)2008: 14.6″ (-4.6 vs mean)2009: 16.6″ (-2.7 vs mean)2010: 24.1″ (+4.9 vs mean)2011: 16.6″ (-2.7 vs mean)2012: 21.5″ (+2.2 vs mean)2013: 3.4″ (-15.9 vs mean)2014: 20.7″ (+1.4 vs mean)2015: 8.4″ (-10.8 vs mean)2016: 21.4″ (+2.1 vs mean)2017: 25.2″ (+6.0 vs mean)2018: 15.7″ (-3.6 vs mean)2019: 23.5″ (+4.2 vs mean)2020: 5.9″ (-13.4 vs mean)2021: 21.8″ (+2.5 vs mean)2022: 13.4″ (-5.9 vs mean)2023: 25.5″ (+6.2 vs mean)2024: 23.5″ (+4.2 vs mean)2025: 16.5″ (-2.8 vs mean)19462025annual precipitation · taller = wetter

Wettest years

198338.34 in
199835.33 in
198234.81 in
195832.29 in
197331.38 in

The Full Record

Every day of the year: normal daily precip, the record one-day total with its year, how often it rains, and the cumulative normal. Type to filter, click a column to sort.
Show me the data — the full daily record
DateNormalRecord 1-dayYrWet-day %Cum. normal
Jan 10.15″2.16″200430%0.15″
Jan 20.15″1.67″197732%0.30″
Jan 30.16″1.33″197433%0.46″
Jan 40.14″5.59″198240%0.60″
Jan 50.14″1.98″195935%0.74″
Jan 60.14″2.34″199331%0.88″
Jan 70.13″0.87″195635%1.01″
Jan 80.13″3.12″201831%1.14″
Jan 90.13″1.40″202342%1.27″
Jan 100.12″1.82″201733%1.39″
Jan 110.13″1.30″198032%1.52″
Jan 120.12″1.56″199336%1.64″
Jan 130.13″1.97″199331%1.77″
Jan 140.13″2.21″197935%1.90″
Jan 150.13″1.03″195633%2.03″
Jan 160.12″1.84″197335%2.15″
Jan 170.13″1.06″197328%2.28″
Jan 180.13″1.82″196932%2.41″
Jan 190.13″1.52″201037%2.54″
Jan 200.13″2.49″196432%2.67″
Jan 210.12″4.07″196738%2.79″
Jan 220.12″1.55″198337%2.91″
Jan 230.12″1.30″200038%3.04″
Jan 240.12″1.72″200033%3.16″
Jan 250.12″2.54″200831%3.27″
Jan 260.12″1.52″198335%3.40″
Jan 270.12″1.65″198127%3.51″
Jan 280.11″1.04″198130%3.63″
Jan 290.11″1.57″196835%3.73″
Jan 300.11″1.91″196333%3.85″
Jan 310.12″1.99″196327%3.96″
Feb 10.11″1.06″196032%4.07″
Feb 20.11″2.92″199828%4.18″
Feb 30.11″1.02″199830%4.29″
Feb 40.11″1.75″202533%4.40″
Feb 50.12″1.26″196931%4.52″
Feb 60.12″1.66″199433%4.64″
Feb 70.13″1.24″197832%4.77″
Feb 80.14″1.52″198537%4.90″
Feb 90.14″2.03″196235%5.05″
Feb 100.14″1.47″195933%5.19″
Feb 110.15″1.61″200037%5.34″
Feb 120.16″1.65″198732%5.49″
Feb 130.16″2.21″197936%5.65″
Feb 140.16″1.48″196230%5.81″
Feb 150.16″2.42″200937%5.97″
Feb 160.15″1.33″199042%6.12″
Feb 170.15″1.83″198640%6.28″
Feb 180.15″1.75″195840%6.43″
Feb 190.15″1.36″198042%6.58″
Feb 200.16″2.16″201732%6.73″
Feb 210.15″1.49″199835%6.88″
Feb 220.15″1.27″200031%7.03″
Feb 230.14″0.77″196931%7.18″
Feb 240.14″1.51″195831%7.32″
Feb 250.13″1.46″200428%7.45″
Feb 260.13″1.06″195538%7.58″
Feb 270.12″1.17″200632%7.71″
Feb 280.12″0.68″201435%7.83″
Feb 290.12″1.34″197640%7.95″
Mar 10.11″1.26″199546%8.06″
Mar 20.11″0.93″197637%8.17″
Mar 30.11″1.01″197038%8.28″
Mar 40.11″1.36″199641%8.38″
Mar 50.10″1.45″201637%8.48″
Mar 60.10″1.13″199236%8.58″
Mar 70.10″1.99″197828%8.68″
Mar 80.10″0.91″199533%8.77″
Mar 90.09″1.80″198632%8.86″
Mar 100.08″0.70″194935%8.95″
Mar 110.08″1.46″197136%9.03″
Mar 120.08″1.12″196837%9.11″
Mar 130.07″1.23″196137%9.19″
Mar 140.08″1.52″195241%9.27″
Mar 150.08″1.22″195437%9.35″
Mar 160.09″0.80″196822%9.43″
Mar 170.09″0.72″198926%9.52″
Mar 180.09″1.05″201131%9.62″
Mar 190.09″1.51″195828%9.71″
Mar 200.09″1.86″197527%9.79″
Mar 210.08″1.83″199537%9.88″
Mar 220.08″1.51″195837%9.96″
Mar 230.08″1.48″201135%10.04″
Mar 240.08″1.08″201235%10.11″
Mar 250.08″1.05″198528%10.19″
Mar 260.08″1.59″196321%10.27″
Mar 270.08″0.65″194628%10.35″
Mar 280.08″1.05″195826%10.43″
Mar 290.07″1.14″196727%10.50″
Mar 300.07″1.67″198231%10.57″
Mar 310.07″1.22″197425%10.64″
Apr 10.06″2.30″195825%10.70″
Apr 20.06″0.76″195815%10.76″
Apr 30.06″0.81″197521%10.82″
Apr 40.07″0.74″196926%10.88″
Apr 50.07″1.46″196727%10.95″
Apr 60.07″0.70″201536%11.02″
Apr 70.07″0.58″196521%11.08″
Apr 80.07″0.96″196523%11.15″
Apr 90.06″1.54″198219%11.21″
Apr 100.06″1.04″202622%11.27″
Apr 110.06″1.31″200323%11.33″
Apr 120.06″1.12″201219%11.39″
Apr 130.05″0.76″201220%11.44″
Apr 140.04″1.02″197819%11.49″
Apr 150.04″0.62″200621%11.53″
Apr 160.04″0.80″195719%11.57″
Apr 170.04″0.40″196319%11.62″
Apr 180.04″0.42″198420%11.65″
Apr 190.03″1.25″198823%11.69″
Apr 200.03″0.83″196119%11.71″
Apr 210.03″0.25″200711%11.74″
Apr 220.03″0.60″198323%11.77″
Apr 230.03″0.34″198319%11.79″
Apr 240.02″0.48″199420%11.82″
Apr 250.02″0.94″197811%11.84″
Apr 260.02″0.89″195315%11.86″
Apr 270.02″0.60″195111%11.88″
Apr 280.02″0.39″194810%11.90″
Apr 290.02″0.73″19489%11.92″
Apr 300.02″0.20″200915%11.94″
May 10.02″0.48″202315%11.96″
May 20.02″0.44″195115%11.98″
May 30.02″0.48″199817%11.99″
May 40.02″0.95″202411%12.01″
May 50.01″0.66″19949%12.02″
May 60.01″0.44″199411%12.04″
May 70.01″0.30″196316%12.05″
May 80.02″0.17″200515%12.07″
May 90.02″0.20″196311%12.09″
May 100.02″0.11″19586%12.11″
May 110.02″0.40″19986%12.13″
May 120.02″0.32″19956%12.15″
May 130.02″0.33″19959%12.17″
May 140.02″0.47″20195%12.19″
May 150.02″1.03″19967%12.20″
May 160.02″0.24″199410%12.22″
May 170.02″1.23″195711%12.24″
May 180.02″0.30″196110%12.25″
May 190.02″1.53″19576%12.27″
May 200.02″0.25″194811%12.29″
May 210.02″0.20″19585%12.30″
May 220.02″0.21″19976%12.32″
May 230.01″0.20″19605%12.33″
May 240.01″0.14″196010%12.35″
May 250.01″0.12″19479%12.36″
May 260.01″0.92″199010%12.36″
May 270.01″0.41″19984%12.37″
May 280.01″0.16″19984%12.38″
May 290.01″0.28″19905%12.39″
May 300.01″0.11″19476%12.40″
May 310.01″0.15″20115%12.41″
Jun 10.01″0.81″19675%12.42″
Jun 20.01″0.18″19996%12.43″
Jun 30.01″0.66″20116%12.44″
Jun 40.01″0.09″20127%12.44″
Jun 50.01″0.32″19537%12.45″
Jun 60.01″0.60″19886%12.45″
Jun 70.01″0.35″197010%12.46″
Jun 80.01″0.60″19647%12.47″
Jun 90.01″0.26″201510%12.47″
Jun 100.01″0.05″19502%12.48″
Jun 110.00″0.04″19541%12.48″
Jun 120.00″0.00″19460%12.48″
Jun 130.00″0.06″19951%12.49″
Jun 140.00″0.19″19951%12.49″
Jun 150.00″0.35″19952%12.49″
Jun 160.00″0.00″19460%12.49″
Jun 170.00″0.14″19742%12.50″
Jun 180.00″0.00″19460%12.50″
Jun 190.00″0.01″19511%12.50″
Jun 200.00″0.00″19460%12.50″
Jun 210.00″0.00″19460%12.51″
Jun 220.00″0.00″19460%12.51″
Jun 230.00″0.04″19752%12.51″
Jun 240.00″0.10″20014%12.52″
Jun 250.00″0.00″19460%12.52″
Jun 260.00″0.05″19912%12.52″
Jun 270.00″0.52″20114%12.52″
Jun 280.00″0.14″19924%12.53″
Jun 290.00″0.20″19925%12.53″
Jun 300.00″0.04″19921%12.53″
Jul 10.00″0.35″19774%12.54″
Jul 20.00″0.09″19802%12.54″
Jul 30.00″0.00″19450%12.54″
Jul 40.00″0.00″19450%12.54″
Jul 50.00″0.00″19450%12.54″
Jul 60.00″0.00″19450%12.54″
Jul 70.00″0.23″19741%12.54″
Jul 80.00″0.01″19451%12.54″
Jul 90.00″0.00″19450%12.54″
Jul 100.00″0.00″19450%12.54″
Jul 110.00″0.00″19450%12.54″
Jul 120.00″0.00″19450%12.54″
Jul 130.00″0.00″19450%12.54″
Jul 140.00″0.13″19751%12.54″
Jul 150.00″0.01″19901%12.54″
Jul 160.00″0.00″19450%12.54″
Jul 170.00″0.01″20071%12.54″
Jul 180.00″0.00″19450%12.54″
Jul 190.00″0.03″19851%12.54″
Jul 200.00″0.09″19791%12.54″
Jul 210.00″0.00″19450%12.54″
Jul 220.00″0.01″19861%12.54″
Jul 230.00″0.00″19450%12.54″
Jul 240.00″0.15″19462%12.54″
Jul 250.00″0.00″19450%12.54″
Jul 260.00″0.00″19450%12.54″
Jul 270.00″0.00″19450%12.54″
Jul 280.00″0.00″19450%12.54″
Jul 290.00″0.03″19661%12.54″
Jul 300.00″0.02″19491%12.54″
Jul 310.00″0.01″20221%12.54″
Aug 10.00″0.00″19450%12.54″
Aug 20.00″0.01″19531%12.54″
Aug 30.00″0.00″19450%12.55″
Aug 40.00″0.00″19450%12.55″
Aug 50.00″0.01″19992%12.55″
Aug 60.00″0.00″19450%12.55″
Aug 70.00″0.01″19621%12.55″
Aug 80.00″0.02″19621%12.55″
Aug 90.00″0.00″19450%12.55″
Aug 100.00″0.29″19652%12.55″
Aug 110.00″0.00″19450%12.55″
Aug 120.00″0.18″19911%12.55″
Aug 130.00″0.09″19911%12.56″
Aug 140.00″0.13″19761%12.56″
Aug 150.00″0.13″19761%12.56″
Aug 160.00″0.04″20202%12.56″
Aug 170.00″0.21″19754%12.56″
Aug 180.00″0.56″19974%12.57″
Aug 190.00″0.04″19974%12.57″
Aug 200.00″0.03″20231%12.57″
Aug 210.00″0.04″19682%12.57″
Aug 220.00″0.01″19761%12.57″
Aug 230.00″0.00″19450%12.58″
Aug 240.00″0.10″20242%12.58″
Aug 250.00″0.01″19611%12.58″
Aug 260.00″0.08″19491%12.58″
Aug 270.00″0.00″19450%12.58″
Aug 280.00″0.02″19532%12.58″
Aug 290.00″0.14″19925%12.58″
Aug 300.00″0.11″19841%12.58″
Aug 310.00″0.01″19641%12.58″
Sep 10.00″0.07″20001%12.58″
Sep 20.00″0.00″19450%12.58″
Sep 30.00″0.00″19450%12.59″
Sep 40.00″0.03″19451%12.59″
Sep 50.00″0.02″19691%12.59″
Sep 60.00″0.00″19450%12.59″
Sep 70.00″0.17″19852%12.59″
Sep 80.00″0.26″19785%12.59″
Sep 90.00″0.00″19450%12.60″
Sep 100.00″0.22″20171%12.60″
Sep 110.00″0.07″19632%12.60″
Sep 120.00″0.27″20091%12.60″
Sep 130.00″0.00″19450%12.60″
Sep 140.00″0.00″19450%12.61″
Sep 150.00″0.88″19897%12.61″
Sep 160.00″0.28″19826%12.61″
Sep 170.00″2.29″195911%12.62″
Sep 180.00″0.46″19775%12.62″
Sep 190.00″0.13″19566%12.62″
Sep 200.00″0.23″20135%12.63″
Sep 210.00″0.20″19906%12.63″
Sep 220.00″0.31″19824%12.63″
Sep 230.00″0.18″19865%12.64″
Sep 240.00″0.41″20147%12.64″
Sep 250.00″0.14″19865%12.64″
Sep 260.01″0.81″19575%12.65″
Sep 270.01″0.16″19576%12.66″
Sep 280.01″0.17″19769%12.66″
Sep 290.01″0.56″19836%12.67″
Sep 300.01″0.09″19768%12.68″
Oct 10.01″0.38″196712%12.69″
Oct 20.01″0.16″20112%12.69″
Oct 30.01″0.33″19946%12.70″
Oct 40.01″0.68″20118%12.71″
Oct 50.02″0.12″19607%12.73″
Oct 60.02″0.44″19737%12.75″
Oct 70.02″0.23″19735%12.76″
Oct 80.02″0.89″19759%12.78″
Oct 90.02″1.26″195719%12.80″
Oct 100.02″2.38″196210%12.82″
Oct 110.02″2.10″19727%12.84″
Oct 120.02″2.64″200911%12.87″
Oct 130.02″0.35″198810%12.89″
Oct 140.02″1.42″196912%12.91″
Oct 150.02″0.49″19729%12.93″
Oct 160.02″1.01″198410%12.96″
Oct 170.03″0.18″20047%12.98″
Oct 180.03″0.56″19799%13.01″
Oct 190.03″1.65″200412%13.04″
Oct 200.03″0.44″202112%13.07″
Oct 210.03″0.91″19739%13.10″
Oct 220.03″1.16″198912%13.13″
Oct 230.03″4.02″202115%13.17″
Oct 240.03″1.50″197912%13.20″
Oct 250.04″1.04″199114%13.24″
Oct 260.04″1.20″200415%13.27″
Oct 270.04″1.07″198110%13.31″
Oct 280.04″0.91″194517%13.35″
Oct 290.04″1.03″194522%13.39″
Oct 300.05″0.77″195614%13.44″
Oct 310.05″0.28″202212%13.49″
Nov 10.05″1.32″200815%13.54″
Nov 20.06″0.72″197020%13.60″
Nov 30.05″0.88″197220%13.65″
Nov 40.06″2.14″199422%13.70″
Nov 50.06″0.90″199420%13.76″
Nov 60.05″1.27″200226%13.81″
Nov 70.06″1.58″200220%13.87″
Nov 80.06″1.29″194930%13.93″
Nov 90.06″0.93″198330%13.98″
Nov 100.06″1.10″196423%14.04″
Nov 110.06″1.32″200128%14.11″
Nov 120.06″2.12″198131%14.17″
Nov 130.07″1.60″197231%14.24″
Nov 140.06″1.04″196826%14.30″
Nov 150.06″1.60″201731%14.36″
Nov 160.06″1.16″202531%14.42″
Nov 170.06″2.26″198220%14.47″
Nov 180.06″1.12″194632%14.54″
Nov 190.06″0.75″196130%14.60″
Nov 200.07″1.81″197725%14.67″
Nov 210.07″0.54″197832%14.74″
Nov 220.08″2.55″202426%14.82″
Nov 230.08″1.47″198525%14.90″
Nov 240.09″1.43″199723%14.99″
Nov 250.10″1.22″196022%15.08″
Nov 260.10″1.11″197023%15.18″
Nov 270.09″1.76″197021%15.27″
Nov 280.10″0.91″197026%15.37″
Nov 290.10″2.39″197327%15.47″
Nov 300.11″1.96″201231%15.58″
Dec 10.12″1.85″200131%15.70″
Dec 20.12″1.89″201439%15.82″
Dec 30.14″1.56″194536%15.95″
Dec 40.14″0.66″196632%16.09″
Dec 50.14″1.41″195043%16.24″
Dec 60.15″1.86″199735%16.38″
Dec 70.15″0.92″200431%16.53″
Dec 80.15″1.32″201625%16.68″
Dec 90.14″1.40″202227%16.82″
Dec 100.14″3.43″201433%16.96″
Dec 110.15″1.16″200628%17.11″
Dec 120.15″3.14″202132%17.26″
Dec 130.15″0.88″200226%17.41″
Dec 140.15″1.59″202431%17.56″
Dec 150.14″2.10″200231%17.70″
Dec 160.14″1.26″200540%17.84″
Dec 170.14″1.77″200537%17.98″
Dec 180.12″1.37″201032%18.10″
Dec 190.11″1.81″195237%18.21″
Dec 200.12″1.73″194536%18.33″
Dec 210.13″2.99″195532%18.46″
Dec 220.12″1.92″202128%18.58″
Dec 230.12″2.00″198332%18.70″
Dec 240.12″1.06″198832%18.82″
Dec 250.12″1.41″197338%18.94″
Dec 260.13″1.46″194840%19.07″
Dec 270.13″2.24″200433%19.20″
Dec 280.13″2.60″200340%19.33″
Dec 290.13″0.70″200132%19.45″
Dec 300.14″3.67″202227%19.59″
Dec 310.14″0.37″200435%19.73″
Records & forecast → San Francisco Airport station Every Day of the Year → national almanac
Data: NOAA/NWS ThreadEx (RCC-ACIS) · normals 1991–2020 (or full record) · part of Weather Trader