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San Diego Intl AP Weather Records (USW00023188)

Record envelope, standing records and threshold days for San Diego Intl AP (USW00023188), California, United States, with 88 years of record.

Key Facts for San Diego Intl AP

  • San Diego Intl AP (USW00023188) is a weather station in California, United States at 32.73 latitude and -117.18 longitude, 5 m (15 ft) above sea level.
  • The station reports from 1939 to 2026, 88 years of record.
  • 1,464 records set at San Diego Intl AP still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • San Diego Intl AP set a daily record high minimum temperature of 21.7 C (71.1 F) on 8 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

  • Location: California, United States, 32.73 latitude, -117.18 longitude.
  • Elevation: 5 m (15 ft).
  • Period of record: 1939 to 2026, 88 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

11 days at or beyond a record
Daily record high and record low at San Diego Intl AP, with 2026 drawn through them The band shows the record high and record low for each calendar day at San Diego Intl AP. The lines show the 2026 daily maximum and minimum. 11 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -1001020304050 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at San Diego Intl AP. The lines show the 2026 daily maximum and minimum. 11 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at San Diego Intl AP, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan31.1 C (88.0 F)-1.7 C (28.9 F)27.8 C (82.0 F)3.3 C (37.9 F)
Feb32.8 C (91.0 F)2.2 C (36.0 F)29.4 C (84.9 F)5.6 C (42.1 F)
Mar33.9 C (93.0 F)3.9 C (39.0 F)31.7 C (89.1 F)8.9 C (48.0 F)
Apr36.7 C (98.1 F)5.0 C (41.0 F)27.2 C (81.0 F)11.1 C (52.0 F)
May36.1 C (97.0 F)8.9 C (48.0 F)25.6 C (78.1 F)13.3 C (55.9 F)
Jun38.3 C (100.9 F)10.0 C (50.0 F)26.1 C (79.0 F)16.1 C (61.0 F)
Jul37.2 C (99.0 F)12.8 C (55.0 F)30.0 C (86.0 F)17.8 C (64.0 F)
Aug36.7 C (98.1 F)13.9 C (57.0 F)31.7 C (89.1 F)20.0 C (68.0 F)
Sep43.9 C (111.0 F)10.6 C (51.1 F)35.0 C (95.0 F)17.2 C (63.0 F)
Oct41.7 C (107.1 F)6.1 C (43.0 F)37.8 C (100.0 F)16.1 C (61.0 F)
Nov37.8 C (100.0 F)3.3 C (37.9 F)n/an/a
Dec31.1 C (88.0 F)1.1 C (34.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at San Diego Intl AP by the year they were set 1,464 records at San Diego Intl AP still stand. 1949 holds the most, with 66. 0204060801939: 211940: 171941: 131942: 151943: 221944: 401945: 241946: 161947: 241948: 411949: 661950: 231951: 161952: 201953: 211954: 151955: 251956: 171957: 91958: 151959: 101960: 121961: 71962: 91963: 201964: 281965: 131966: 101967: 161968: 101969: 111970: 61971: 361972: 91973: 41975: 151976: 161977: 151978: 391979: 191980: 351981: 451982: 131983: 341984: 531985: 191986: 81987: 201988: 121989: 171990: 121991: 151992: 121993: 41994: 71995: 71996: 61997: 111998: 51999: 292000: 52001: 152002: 142003: 132004: 132005: 62006: 112007: 92008: 112009: 102010: 352011: 92012: 72013: 72014: 262015: 272016: 102017: 82018: 222019: 72020: 202021: 102022: 152023: 62024: 32025: 32026: 131939194819571966197619851994200320122021
1,464 records at San Diego Intl AP still stand. 1949 holds the most, with 66.
Standing records at San Diego Intl AP by the year they were set
Year setStanding records
193921
194017
194113
194215
194322
194440
194524
194616
194724
194841
194966
195023
195116
195220
195321
195415
195525
195617
19579
195815
195910
196012
19617
19629
196320
196428
196513
196610
196716
196810
196911
19706
197136
19729
19734
197515
197616
197715
197839
197919
198035
198145
198213
198334
198453
198519
19868
198720
198812
198917
199012
199115
199212
19934
19947
19957
19966
199711
19985
199929
20005
200115
200214
200313
200413
20056
200611
20079
200811
200910
201035
20119
20127
20137
201426
201527
201610
20178
201822
20197
202020
202110
202215
20236
20243
20253
202613

All-Time Record Progression

3 new records
When San Diego Intl AP set new all-time records 3 all-time records were set at San Diego Intl AP between 9 September 1984 and 22 January 2024. Each dot is a new record. Record high minimum temperatureRecord daily precipitation9 September 1984: Record high minimum temperature 25.6 C (78.1 F)27 October 2004: Record daily precipitation 68.6 mm (2.7 in)22 January 2024: Record daily precipitation 69.3 mm (2.7 in)1990200020102020
3 all-time records were set at San Diego Intl AP between 9 September 1984 and 22 January 2024. Each dot is a new record.
When San Diego Intl AP set new all-time records
DateKindDetail
1984-09-09Record high minimum temperatureRecord high minimum temperature 25.6 C (78.1 F)
2004-10-27Record daily precipitationRecord daily precipitation 68.6 mm (2.7 in)
2024-01-22Record daily precipitationRecord daily precipitation 69.3 mm (2.7 in)

Wettest Day of Each Month

Jan: 69.3 mm (2.7 in)
Record daily precipitation for each month at San Diego Intl AP The wettest day on record for each calendar month at San Diego Intl AP. The most was 69.3 mm (2.7 in) on 22 January 2024. 020406080 Jan: 69.3 mm (2.7 in), 22 January 2024 Jan Feb: 59.4 mm (2.3 in), 27 February 2017 Feb Mar: 53.6 mm (2.1 in), 7 March 1952 Mar Apr: 36.1 mm (1.4 in), 20 April 1988 Apr May: 41.4 mm (1.6 in), 14 May 2015 May Jun: 12.4 mm (0.5 in), 10 June 1990 Jun Jul: 26.2 mm (1.0 in), 18 July 2015 Jul Aug: 46.2 mm (1.8 in), 20 August 2023 Aug Sep: 30.7 mm (1.2 in), 15 September 2015 Sep Oct: 68.6 mm (2.7 in), 27 October 2004 Oct Nov: 51.8 mm (2.0 in), 25 November 1985 Nov Dec: 66.0 mm (2.6 in), 22 December 1945 Dec
The wettest day on record for each calendar month at San Diego Intl AP. The most was 69.3 mm (2.7 in) on 22 January 2024.
Record daily precipitation for each month at San Diego Intl AP
MonthRecord daily precipitation (mm)Date
Jan69.3 mm (2.7 in)22 January 2024
Feb59.4 mm (2.3 in)27 February 2017
Mar53.6 mm (2.1 in)7 March 1952
Apr36.1 mm (1.4 in)20 April 1988
May41.4 mm (1.6 in)14 May 2015
Jun12.4 mm (0.5 in)10 June 1990
Jul26.2 mm (1.0 in)18 July 2015
Aug46.2 mm (1.8 in)20 August 2023
Sep30.7 mm (1.2 in)15 September 2015
Oct68.6 mm (2.7 in)27 October 2004
Nov51.8 mm (2.0 in)25 November 1985
Dec66.0 mm (2.6 in)22 December 1945

Period of Record Coverage

1939 to 2026
Days with data per year at San Diego Intl AP 88 years of record at San Diego Intl AP, 1939 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1939, 2026. 1939: 184 of 365 days1940: 366 of 366 days1941: 365 of 365 days1942: 365 of 365 days1943: 365 of 365 days1944: 366 of 366 days1945: 365 of 365 days1946: 364 of 365 days1947: 362 of 365 days1948: 366 of 366 days1949: 365 of 365 days1950: 365 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 365 of 365 days1955: 365 of 365 days1956: 366 of 366 days1957: 365 of 365 days1958: 365 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 365 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 366 of 366 days1989: 365 of 365 days1990: 365 of 365 days1991: 365 of 365 days1992: 366 of 366 days1993: 365 of 365 days1994: 365 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 365 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 364 of 365 days2015: 365 of 365 days2016: 366 of 366 days2017: 365 of 365 days2018: 364 of 365 days2019: 365 of 365 days2020: 366 of 366 days2021: 365 of 365 days2022: 365 of 365 days2023: 365 of 365 days2024: 366 of 366 days2025: 363 of 365 days2026: 285 of 365 days195019651980199520102025
88 years of record at San Diego Intl AP, 1939 to 2026. 2 years have data for under 90 percent of days and are left out of rankings: 1939, 2026.
Days with data per year at San Diego Intl AP
YearDays with dataShare of yearComplete
193918450%No
1940366100%Yes
1941365100%Yes
1942365100%Yes
1943365100%Yes
1944366100%Yes
1945365100%Yes
1946364100%Yes
194736299%Yes
1948366100%Yes
1949365100%Yes
1950365100%Yes
1951365100%Yes
1952366100%Yes
1953365100%Yes
1954365100%Yes
1955365100%Yes
1956366100%Yes
1957365100%Yes
1958365100%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975365100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
1982365100%Yes
1983365100%Yes
1984366100%Yes
1985365100%Yes
1986365100%Yes
1987365100%Yes
1988366100%Yes
1989365100%Yes
1990365100%Yes
1991365100%Yes
1992366100%Yes
1993365100%Yes
1994365100%Yes
1995365100%Yes
1996366100%Yes
1997365100%Yes
1998365100%Yes
1999365100%Yes
2000366100%Yes
2001365100%Yes
2002365100%Yes
2003365100%Yes
2004366100%Yes
2005365100%Yes
2006365100%Yes
2007365100%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
2014364100%Yes
2015365100%Yes
2016366100%Yes
2017365100%Yes
2018364100%Yes
2019365100%Yes
2020366100%Yes
2021365100%Yes
2022365100%Yes
2023365100%Yes
2024366100%Yes
202536399%Yes
202628578%No

Latest Records

20
Latest records at San Diego Intl AP
DateStationRecordValueBeat old record byOld record stoodSignificance
8 October 2026San Diego Intl AP, USdaily high min (Provisional)21.7 C (71.1 F)1.1 C (2.0 F)47 years26 of 100 (Routine)
7 October 2026San Diego Intl AP, USdaily high min (Provisional)21.1 C (70.0 F)0.5 C (0.9 F)49 years24 of 100 (Routine)
6 October 2026San Diego Intl AP, USdaily high min (Provisional)21.7 C (71.1 F)0.6 C (1.1 F)55 years26 of 100 (Routine)
5 October 2026San Diego Intl AP, USdaily high min (Provisional)22.8 C (73.0 F)1.7 C (3.1 F)28 years23 of 100 (Routine)
5 October 2026San Diego Intl AP, USdaily high max (Tie, Provisional)36.1 C (97.0 F)tie55 years6 of 100 (Routine)
4 October 2026San Diego Intl AP, USdaily high min (Provisional)23.3 C (73.9 F)2.2 C (4.0 F)40 years29 of 100 (Routine)
4 October 2026San Diego Intl AP, USdaily high max (Provisional)37.8 C (100.0 F)1.7 C (3.1 F)39 years24 of 100 (Routine)
3 October 2026San Diego Intl AP, USdaily high min (Provisional)22.2 C (72.0 F)1.6 C (2.9 F)40 years26 of 100 (Routine)
2 October 2026San Diego Intl AP, USdaily high max (Provisional)35.0 C (95.0 F)0.6 C (1.1 F)80 years33 of 100 (Routine)
7 September 2026San Diego Intl AP, USdaily high max (Provisional)35.0 C (95.0 F)1.7 C (3.1 F)76 years36 of 100 (Notable)
7 September 2026San Diego Intl AP, USdaily high min (Provisional)23.3 C (73.9 F)0.5 C (0.9 F)41 years22 of 100 (Routine)
6 September 2026San Diego Intl AP, USdaily high min (Tie, Provisional)22.8 C (73.0 F)tie41 years5 of 100 (Routine)
21 July 2026San Diego Intl AP, USdaily high max30.0 C (86.0 F)0.6 C (1.1 F)44 years23 of 100 (Routine)
15 June 2026San Diego Intl AP, USdaily high min19.4 C (66.9 F)0.5 C (0.9 F)41 years23 of 100 (Routine)
14 June 2026San Diego Intl AP, USdaily high min (Tie)18.9 C (66.0 F)tie48 years5 of 100 (Routine)
4 May 2026San Diego Intl AP, USdaily rain2.0 mm (0.08 in)1.0 mm (0.04 in)65 years20 of 100 (Routine)
10 April 2026San Diego Intl AP, USdaily high min17.2 C (63.0 F)0.5 C (0.9 F)45 years23 of 100 (Routine)
9 April 2026San Diego Intl AP, USdaily high min (Tie)16.7 C (62.1 F)tie7 years2 of 100 (Routine)
31 March 2026San Diego Intl AP, USdaily high min18.3 C (64.9 F)2.2 C (4.0 F)11 years20 of 100 (Routine)
23 March 2026San Diego Intl AP, USdaily high min (Tie)16.1 C (61.0 F)tie12 years2 of 100 (Routine)

Climate Trend

86 complete years, 1940 to 2025
Annual mean temperature at San Diego Intl AP as warming stripes, 1940 to 2025 One stripe for each of 86 complete years at San Diego Intl AP, 1940 to 2025. Blue stripes are years cooler than the station's own mean of 17.7 C (63.9 F); red stripes are warmer. The coolest year was 1948, at 16.3 C (61.3 F), and the warmest was 2014, at 19.7 C (67.5 F). The strongest colour marks a difference of 2.0 C (3.6 F). 1940: 17.6 C, -0.2 C from the station mean1941: 17.8 C, +0.1 C from the station mean1942: 17.0 C, -0.7 C from the station mean1943: 17.5 C, -0.2 C from the station mean1944: 16.6 C, -1.2 C from the station mean1945: 17.0 C, -0.8 C from the station mean1946: 17.2 C, -0.6 C from the station mean1947: 17.3 C, -0.4 C from the station mean1948: 16.3 C, -1.5 C from the station mean1949: 16.6 C, -1.2 C from the station mean1950: 16.8 C, -1.0 C from the station mean1951: 16.9 C, -0.9 C from the station mean1952: 16.7 C, -1.0 C from the station mean1953: 17.3 C, -0.4 C from the station mean1954: 17.4 C, -0.3 C from the station mean1955: 16.8 C, -0.9 C from the station mean1956: 17.3 C, -0.5 C from the station mean1957: 17.9 C, +0.1 C from the station mean1958: 18.6 C, +0.8 C from the station mean1959: 18.7 C, +1.0 C from the station mean1960: 17.6 C, -0.2 C from the station mean1961: 17.5 C, -0.3 C from the station mean1962: 16.7 C, -1.0 C from the station mean1963: 17.6 C, -0.2 C from the station mean1964: 16.7 C, -1.0 C from the station mean1965: 17.0 C, -0.8 C from the station mean1966: 17.2 C, -0.5 C from the station mean1967: 17.3 C, -0.4 C from the station mean1968: 17.8 C, +0.1 C from the station mean1969: 17.5 C, -0.3 C from the station mean1970: 17.5 C, -0.2 C from the station mean1971: 17.0 C, -0.8 C from the station mean1972: 17.6 C, -0.2 C from the station mean1973: 17.4 C, -0.3 C from the station mean1974: 17.6 C, -0.2 C from the station mean1975: 16.9 C, -0.9 C from the station mean1976: 18.8 C, +1.1 C from the station mean1977: 18.4 C, +0.7 C from the station mean1978: 19.0 C, +1.2 C from the station mean1979: 18.6 C, +0.9 C from the station mean1980: 18.8 C, +1.1 C from the station mean1981: 19.5 C, +1.7 C from the station mean1982: 18.4 C, +0.7 C from the station mean1983: 19.4 C, +1.7 C from the station mean1984: 19.6 C, +1.8 C from the station mean1985: 18.0 C, +0.3 C from the station mean1986: 17.8 C, +0.1 C from the station mean1987: 17.3 C, -0.4 C from the station mean1988: 17.6 C, -0.2 C from the station mean1989: 17.7 C, -0.1 C from the station mean1990: 17.9 C, +0.1 C from the station mean1991: 17.1 C, -0.6 C from the station mean1992: 18.7 C, +0.9 C from the station mean1993: 17.8 C, +0.1 C from the station mean1994: 17.4 C, -0.3 C from the station mean1995: 17.8 C, 0.0 C from the station mean1996: 18.0 C, +0.3 C from the station mean1997: 18.5 C, +0.8 C from the station mean1998: 17.2 C, -0.6 C from the station mean1999: 16.8 C, -1.0 C from the station mean2000: 17.6 C, -0.2 C from the station mean2001: 16.9 C, -0.9 C from the station mean2002: 16.8 C, -0.9 C from the station mean2003: 17.7 C, -0.1 C from the station mean2004: 18.1 C, +0.4 C from the station mean2005: 17.9 C, +0.1 C from the station mean2006: 18.1 C, +0.4 C from the station mean2007: 17.2 C, -0.6 C from the station mean2008: 17.6 C, -0.2 C from the station mean2009: 17.8 C, +0.1 C from the station mean2010: 17.2 C, -0.6 C from the station mean2011: 17.5 C, -0.3 C from the station mean2012: 17.9 C, +0.1 C from the station mean2013: 17.8 C, 0.0 C from the station mean2014: 19.7 C, +2.0 C from the station mean2015: 19.7 C, +2.0 C from the station mean2016: 19.1 C, +1.3 C from the station mean2017: 19.0 C, +1.2 C from the station mean2018: 19.0 C, +1.3 C from the station mean2019: 18.0 C, +0.3 C from the station mean2020: 18.9 C, +1.1 C from the station mean2021: 18.3 C, +0.5 C from the station mean2022: 17.8 C, 0.0 C from the station mean2023: 17.3 C, -0.5 C from the station mean2024: 17.8 C, 0.0 C from the station mean2025: 17.8 C, +0.1 C from the station mean194019501960197019801990200020102020
One stripe for each of 86 complete years at San Diego Intl AP, 1940 to 2025. Blue stripes are years cooler than the station's own mean of 17.7 C (63.9 F); red stripes are warmer. The coolest year was 1948, at 16.3 C (61.3 F), and the warmest was 2014, at 19.7 C (67.5 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at San Diego Intl AP as warming stripes, 1940 to 2025
YearAnnual mean temperatureDifference from the station mean
194017.6 C-0.18 C
194117.8 C+0.06 C
194217.0 C-0.74 C
194317.5 C-0.25 C
194416.6 C-1.19 C
194517.0 C-0.77 C
194617.2 C-0.56 C
194717.3 C-0.41 C
194816.3 C-1.49 C
194916.6 C-1.20 C
195016.8 C-1.00 C
195116.9 C-0.89 C
195216.7 C-1.01 C
195317.3 C-0.44 C
195417.4 C-0.33 C
195516.8 C-0.92 C
195617.3 C-0.47 C
195717.9 C+0.14 C
195818.6 C+0.84 C
195918.7 C+0.98 C
196017.6 C-0.20 C
196117.5 C-0.26 C
196216.7 C-1.04 C
196317.6 C-0.20 C
196416.7 C-1.01 C
196517.0 C-0.77 C
196617.2 C-0.53 C
196717.3 C-0.41 C
196817.8 C+0.06 C
196917.5 C-0.29 C
197017.5 C-0.24 C
197117.0 C-0.78 C
197217.6 C-0.19 C
197317.4 C-0.34 C
197417.6 C-0.20 C
197516.9 C-0.88 C
197618.8 C+1.07 C
197718.4 C+0.69 C
197819.0 C+1.24 C
197918.6 C+0.88 C
198018.8 C+1.06 C
198119.5 C+1.74 C
198218.4 C+0.67 C
198319.4 C+1.69 C
198419.6 C+1.81 C
198518.0 C+0.29 C
198617.8 C+0.08 C
198717.3 C-0.43 C
198817.6 C-0.18 C
198917.7 C-0.08 C
199017.9 C+0.10 C
199117.1 C-0.61 C
199218.7 C+0.91 C
199317.8 C+0.08 C
199417.4 C-0.31 C
199517.8 C+0.02 C
199618.0 C+0.25 C
199718.5 C+0.76 C
199817.2 C-0.56 C
199916.8 C-0.99 C
200017.6 C-0.18 C
200116.9 C-0.89 C
200216.8 C-0.91 C
200317.7 C-0.10 C
200418.1 C+0.37 C
200517.9 C+0.11 C
200618.1 C+0.35 C
200717.2 C-0.60 C
200817.6 C-0.16 C
200917.8 C+0.06 C
201017.2 C-0.60 C
201117.5 C-0.27 C
201217.9 C+0.12 C
201317.8 C+0.04 C
201419.7 C+1.99 C
201519.7 C+1.95 C
201619.1 C+1.30 C
201719.0 C+1.20 C
201819.0 C+1.29 C
201918.0 C+0.26 C
202018.9 C+1.14 C
202118.3 C+0.51 C
202217.8 C+0.01 C
202317.3 C-0.47 C
202417.8 C+0.00 C
202517.8 C+0.06 C

The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1940 to 2025. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 86 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at San Diego Intl AP
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.1 C (0.1 to 0.2) per decade0.2 F (0.1 to 0.3) per decade1940 to 202586Rise
Mean daily maximum0.01 C (-0.06 to 0.07) per decade0.01 F (-0.11 to 0.13) per decade1940 to 202586Not clearly different from zero
Mean daily minimum0.3 C (0.2 to 0.3) per decade0.5 F (0.3 to 0.6) per decade1940 to 202586Rise

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

1939 to 2026
Yearly extremes at San Diego Intl AP: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)43.9 C (111.0 F)196334.4 C (93.9 F)88
Coldest night (TNn)-1.7 C (28.9 F)19493.9 C (39.0 F)88
Wettest day (Rx1day)69.3 mm (2.7 in)202436.9 mm (1.5 in)88
Wettest five days (Rx5day)141.3 mm (5.6 in)194362.3 mm (2.5 in)88
Longest dry spell (CDD)235 days1973146 days88

Hottest day (TXx)

Hottest day (TXx) at San Diego Intl AP by year The hottest day of the year at San Diego Intl AP, 1939 to 2026. The record is 43.9 C (111.0 F) in 1963, marked on the chart; the median year is 34.4 C (93.9 F). 253035404519401960198020002020Record: 43.9 C (111.0 F) in 1963
The hottest day of the year at San Diego Intl AP, 1939 to 2026. The record is 43.9 C (111.0 F) in 1963, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at San Diego Intl AP by year
YearHottest day (TXx)
193941.1 C (106.0 F)
194035.0 C (95.0 F)
194132.2 C (90.0 F)
194232.2 C (90.0 F)
194330.6 C (87.1 F)
194429.4 C (84.9 F)
194534.4 C (93.9 F)
194632.2 C (90.0 F)
194733.3 C (91.9 F)
194832.2 C (90.0 F)
194933.3 C (91.9 F)
195033.3 C (91.9 F)
195132.8 C (91.0 F)
195232.2 C (90.0 F)
195335.6 C (96.1 F)
195431.1 C (88.0 F)
195540.0 C (104.0 F)
195635.6 C (96.1 F)
195736.1 C (97.0 F)
195836.7 C (98.1 F)
195938.9 C (102.0 F)
196033.3 C (91.9 F)
196141.7 C (107.1 F)
196231.7 C (89.1 F)
196343.9 C (111.0 F)
196436.1 C (97.0 F)
196540.0 C (104.0 F)
196636.1 C (97.0 F)
196732.8 C (91.0 F)
196833.9 C (93.0 F)
196931.7 C (89.1 F)
197036.1 C (97.0 F)
197138.3 C (100.9 F)
197233.3 C (91.9 F)
197333.9 C (93.0 F)
197433.3 C (91.9 F)
197539.4 C (102.9 F)
197636.1 C (97.0 F)
197730.6 C (87.1 F)
197838.3 C (100.9 F)
197938.3 C (100.9 F)
198035.0 C (95.0 F)
198137.8 C (100.0 F)
198232.8 C (91.0 F)
198335.0 C (95.0 F)
198437.8 C (100.0 F)
198536.7 C (98.1 F)
198632.2 C (90.0 F)
198740.0 C (104.0 F)
198841.7 C (107.1 F)
198937.8 C (100.0 F)
199034.4 C (93.9 F)
199134.4 C (93.9 F)
199232.8 C (91.0 F)
199330.6 C (87.1 F)
199437.2 C (99.0 F)
199532.2 C (90.0 F)
199631.1 C (88.0 F)
199733.3 C (91.9 F)
199833.3 C (91.9 F)
199932.2 C (90.0 F)
200031.7 C (89.1 F)
200129.4 C (84.9 F)
200232.8 C (91.0 F)
200331.1 C (88.0 F)
200435.6 C (96.1 F)
200531.7 C (89.1 F)
200637.2 C (99.0 F)
200732.8 C (91.0 F)
200834.4 C (93.9 F)
200936.7 C (98.1 F)
201037.8 C (100.0 F)
201136.1 C (97.0 F)
201238.3 C (100.9 F)
201331.7 C (89.1 F)
201436.1 C (97.0 F)
201537.2 C (99.0 F)
201638.3 C (100.9 F)
201736.7 C (98.1 F)
201832.8 C (91.0 F)
201934.4 C (93.9 F)
202037.8 C (100.0 F)
202133.3 C (91.9 F)
202235.0 C (95.0 F)
202330.0 C (86.0 F)
202434.4 C (93.9 F)
202531.1 C (88.0 F)
202637.8 C (100.0 F)

Coldest night (TNn)

Coldest night (TNn) at San Diego Intl AP by year The coldest night of the year at San Diego Intl AP, 1939 to 2026. The record is -1.7 C (28.9 F) in 1949, marked on the chart; the median year is 3.9 C (39.0 F). -2.502.557.519401960198020002020Record: -1.7 C (28.9 F) in 1949
The coldest night of the year at San Diego Intl AP, 1939 to 2026. The record is -1.7 C (28.9 F) in 1949, marked on the chart; the median year is 3.9 C (39.0 F).
Coldest night (TNn) at San Diego Intl AP by year
YearColdest night (TNn)
19396.1 C (43.0 F)
19404.4 C (39.9 F)
19414.4 C (39.9 F)
19422.2 C (36.0 F)
19434.4 C (39.9 F)
19444.4 C (39.9 F)
19453.9 C (39.0 F)
19463.3 C (37.9 F)
19471.1 C (34.0 F)
19482.2 C (36.0 F)
1949-1.7 C (28.9 F)
19501.7 C (35.1 F)
19512.8 C (37.0 F)
19522.2 C (36.0 F)
19533.3 C (37.9 F)
19543.3 C (37.9 F)
19553.3 C (37.9 F)
19563.3 C (37.9 F)
19575.6 C (42.1 F)
19585.0 C (41.0 F)
19596.1 C (43.0 F)
19601.7 C (35.1 F)
19616.1 C (43.0 F)
19624.4 C (39.9 F)
1963-0.6 C (30.9 F)
19643.3 C (37.9 F)
19653.3 C (37.9 F)
19663.3 C (37.9 F)
19673.3 C (37.9 F)
19682.2 C (36.0 F)
19693.3 C (37.9 F)
19703.9 C (39.0 F)
19710.6 C (33.1 F)
19722.8 C (37.0 F)
19733.3 C (37.9 F)
19742.2 C (36.0 F)
19754.4 C (39.9 F)
19762.8 C (37.0 F)
19776.7 C (44.1 F)
19781.1 C (34.0 F)
19794.4 C (39.9 F)
19806.7 C (44.1 F)
19816.7 C (44.1 F)
19824.4 C (39.9 F)
19835.0 C (41.0 F)
19845.6 C (42.1 F)
19853.3 C (37.9 F)
19866.1 C (43.0 F)
19871.1 C (34.0 F)
19883.3 C (37.9 F)
19892.8 C (37.0 F)
19902.2 C (36.0 F)
19915.6 C (42.1 F)
19923.3 C (37.9 F)
19933.9 C (39.0 F)
19943.9 C (39.0 F)
19956.1 C (43.0 F)
19966.1 C (43.0 F)
19973.9 C (39.0 F)
19983.9 C (39.0 F)
19996.1 C (43.0 F)
20006.1 C (43.0 F)
20015.0 C (41.0 F)
20023.9 C (39.0 F)
20034.4 C (39.9 F)
20045.0 C (41.0 F)
20056.7 C (44.1 F)
20065.6 C (42.1 F)
20071.7 C (35.1 F)
20085.0 C (41.0 F)
20095.6 C (42.1 F)
20105.6 C (42.1 F)
20115.0 C (41.0 F)
20125.0 C (41.0 F)
20133.9 C (39.0 F)
20146.1 C (43.0 F)
20155.0 C (41.0 F)
20165.0 C (41.0 F)
20175.0 C (41.0 F)
20185.0 C (41.0 F)
20195.0 C (41.0 F)
20203.3 C (37.9 F)
20213.3 C (37.9 F)
20223.3 C (37.9 F)
20233.9 C (39.0 F)
20243.3 C (37.9 F)
20253.9 C (39.0 F)
20263.3 C (37.9 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at San Diego Intl AP by year The wettest day of the year at San Diego Intl AP, 1939 to 2026. The record is 69.3 mm (2.7 in) in 2024, marked on the chart; the median year is 36.9 mm (1.5 in). 02040608019401960198020002020Record: 69.3 mm (2.7 in) in 2024
The wettest day of the year at San Diego Intl AP, 1939 to 2026. The record is 69.3 mm (2.7 in) in 2024, marked on the chart; the median year is 36.9 mm (1.5 in).
Wettest day (Rx1day) at San Diego Intl AP by year
YearWettest day (Rx1day)
193920.6 mm (0.8 in)
194058.7 mm (2.3 in)
194143.4 mm (1.7 in)
194235.3 mm (1.4 in)
194365.0 mm (2.6 in)
194449.8 mm (2.0 in)
194566.0 mm (2.6 in)
194625.4 mm (1.0 in)
194726.7 mm (1.1 in)
194825.4 mm (1.0 in)
194927.7 mm (1.1 in)
195047.0 mm (1.9 in)
195149.8 mm (2.0 in)
195253.6 mm (2.1 in)
195315.0 mm (0.6 in)
195435.3 mm (1.4 in)
195533.3 mm (1.3 in)
195623.4 mm (0.9 in)
195732.3 mm (1.3 in)
195834.8 mm (1.4 in)
195926.2 mm (1.0 in)
196030.7 mm (1.2 in)
196124.6 mm (1.0 in)
196234.8 mm (1.4 in)
196337.1 mm (1.5 in)
196420.8 mm (0.8 in)
196554.6 mm (2.1 in)
196634.0 mm (1.3 in)
196738.9 mm (1.5 in)
196833.8 mm (1.3 in)
196951.1 mm (2.0 in)
197041.7 mm (1.6 in)
197124.4 mm (1.0 in)
197227.2 mm (1.1 in)
197318.0 mm (0.7 in)
197436.3 mm (1.4 in)
197536.6 mm (1.4 in)
197643.4 mm (1.7 in)
197737.8 mm (1.5 in)
197853.8 mm (2.1 in)
197965.3 mm (2.6 in)
198048.8 mm (1.9 in)
198141.7 mm (1.6 in)
198251.6 mm (2.0 in)
198337.8 mm (1.5 in)
198439.9 mm (1.6 in)
198551.8 mm (2.0 in)
198639.4 mm (1.6 in)
198734.5 mm (1.4 in)
198836.1 mm (1.4 in)
198925.7 mm (1.0 in)
199021.1 mm (0.8 in)
199133.3 mm (1.3 in)
199249.5 mm (1.9 in)
199345.7 mm (1.8 in)
199425.4 mm (1.0 in)
199556.9 mm (2.2 in)
199628.2 mm (1.1 in)
199723.1 mm (0.9 in)
199838.6 mm (1.5 in)
199919.6 mm (0.8 in)
200040.4 mm (1.6 in)
200126.9 mm (1.1 in)
200220.8 mm (0.8 in)
200337.6 mm (1.5 in)
200468.6 mm (2.7 in)
200555.4 mm (2.2 in)
200619.6 mm (0.8 in)
200723.6 mm (0.9 in)
200840.6 mm (1.6 in)
200939.6 mm (1.6 in)
201051.1 mm (2.0 in)
201135.6 mm (1.4 in)
201239.6 mm (1.6 in)
201326.4 mm (1.0 in)
201446.7 mm (1.8 in)
201541.4 mm (1.6 in)
201641.9 mm (1.6 in)
201759.4 mm (2.3 in)
201845.7 mm (1.8 in)
201934.8 mm (1.4 in)
202029.5 mm (1.2 in)
202124.9 mm (1.0 in)
202221.3 mm (0.8 in)
202346.2 mm (1.8 in)
202469.3 mm (2.7 in)
202534.3 mm (1.4 in)
202652.8 mm (2.1 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at San Diego Intl AP by year The wettest five days of the year at San Diego Intl AP, 1939 to 2026. The record is 141.3 mm (5.6 in) in 1943, marked on the chart; the median year is 62.3 mm (2.5 in). 05010015019401960198020002020Record: 141.3 mm (5.6 in) in 1943
The wettest five days of the year at San Diego Intl AP, 1939 to 2026. The record is 141.3 mm (5.6 in) in 1943, marked on the chart; the median year is 62.3 mm (2.5 in).
Wettest five days (Rx5day) at San Diego Intl AP by year
YearWettest five days (Rx5day)
193936.9 mm (1.5 in)
194096.0 mm (3.8 in)
194185.3 mm (3.4 in)
194248.6 mm (1.9 in)
1943141.3 mm (5.6 in)
194496.7 mm (3.8 in)
194591.1 mm (3.6 in)
194658.4 mm (2.3 in)
194771.1 mm (2.8 in)
194833.8 mm (1.3 in)
194961.3 mm (2.4 in)
195050.6 mm (2.0 in)
195157.8 mm (2.3 in)
195271.4 mm (2.8 in)
195320.8 mm (0.8 in)
195479.0 mm (3.1 in)
195536.4 mm (1.4 in)
195632.0 mm (1.3 in)
195754.3 mm (2.1 in)
195850.8 mm (2.0 in)
195941.1 mm (1.6 in)
196057.7 mm (2.3 in)
196127.6 mm (1.1 in)
196266.6 mm (2.6 in)
196338.1 mm (1.5 in)
196429.9 mm (1.2 in)
1965105.1 mm (4.1 in)
196675.9 mm (3.0 in)
196772.1 mm (2.8 in)
196836.1 mm (1.4 in)
196958.4 mm (2.3 in)
197078.2 mm (3.1 in)
197151.8 mm (2.0 in)
197249.0 mm (1.9 in)
197327.4 mm (1.1 in)
197471.9 mm (2.8 in)
197563.8 mm (2.5 in)
1976105.3 mm (4.1 in)
197754.1 mm (2.1 in)
197890.4 mm (3.6 in)
197976.0 mm (3.0 in)
198081.6 mm (3.2 in)
198177.8 mm (3.1 in)
198293.6 mm (3.7 in)
198395.0 mm (3.7 in)
198442.9 mm (1.7 in)
198565.3 mm (2.6 in)
198648.6 mm (1.9 in)
198744.1 mm (1.7 in)
198874.7 mm (2.9 in)
198925.7 mm (1.0 in)
199043.9 mm (1.7 in)
199184.3 mm (3.3 in)
199255.1 mm (2.2 in)
1993111.2 mm (4.4 in)
199434.8 mm (1.4 in)
199570.6 mm (2.8 in)
199643.2 mm (1.7 in)
199741.5 mm (1.6 in)
199864.3 mm (2.5 in)
199932.3 mm (1.3 in)
200071.2 mm (2.8 in)
200166.5 mm (2.6 in)
200234.3 mm (1.4 in)
200376.2 mm (3.0 in)
200480.3 mm (3.2 in)
200594.1 mm (3.7 in)
200620.9 mm (0.8 in)
200723.9 mm (0.9 in)
200868.6 mm (2.7 in)
200956.1 mm (2.2 in)
2010109.1 mm (4.3 in)
201135.6 mm (1.4 in)
201246.0 mm (1.8 in)
201337.0 mm (1.5 in)
201464.3 mm (2.5 in)
201546.7 mm (1.8 in)
201675.7 mm (3.0 in)
201760.9 mm (2.4 in)
201866.0 mm (2.6 in)
201966.8 mm (2.6 in)
202086.1 mm (3.4 in)
202131.7 mm (1.2 in)
202225.3 mm (1.0 in)
202371.1 mm (2.8 in)
202485.6 mm (3.4 in)
202563.3 mm (2.5 in)
202678.1 mm (3.1 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at San Diego Intl AP by year The longest dry spell of the year at San Diego Intl AP, 1939 to 2026. The record is 235 days in 1973, marked on the chart; the median year is 146 days. 5010015020025019401960198020002020Record: 235 days in 1973
The longest dry spell of the year at San Diego Intl AP, 1939 to 2026. The record is 235 days in 1973, marked on the chart; the median year is 146 days.
Longest dry spell (CDD) at San Diego Intl AP by year
YearLongest dry spell (CDD)
193966 days
1940152 days
194186 days
1942154 days
1943169 days
1944155 days
1945102 days
1946192 days
1947112 days
1948171 days
1949153 days
1950127 days
1951120 days
1952157 days
1953125 days
1954195 days
1955115 days
1956166 days
195788 days
1958133 days
1959183 days
1960128 days
1961193 days
1962184 days
196383 days
1964152 days
1965157 days
1966199 days
196779 days
196898 days
1969163 days
1970158 days
1971140 days
1972103 days
1973235 days
1974214 days
1975172 days
1976125 days
197795 days
1978126 days
197990 days
1980168 days
1981154 days
1982159 days
198399 days
198478 days
1985148 days
1986170 days
1987170 days
1988165 days
1989100 days
1990161 days
1991120 days
199270 days
1993127 days
1994195 days
1995107 days
1996107 days
1997164 days
1998101 days
1999176 days
2000170 days
2001196 days
2002132 days
2003181 days
2004182 days
2005137 days
2006144 days
2007152 days
2008132 days
2009181 days
2010160 days
201198 days
2012167 days
201389 days
201497 days
201565 days
2016136 days
2017124 days
2018155 days
2019124 days
2020117 days
202186 days
2022163 days
2023108 days
2024180 days
2025106 days
2026157 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.

Rainfall Return Levels

86 years, 1940 to 2025

A day with at least 36.8 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 74.6 mm (2.9 in) of rain is expected about once in 100 years.

Rainfall return levels at San Diego Intl AP: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years36.8 mm (1.4 in)
5 years48.6 mm (1.9 in)
10 years55.7 mm (2.2 in)
25 years63.9 mm (2.5 in)
50 years69.5 mm (2.7 in)
100 years74.6 mm (2.9 in)Longer than the 86 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 86 years of values from 1940 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 69.3 mm (2.7 in) in 2024; 68.6 mm (2.7 in) in 2004; 66.0 mm (2.6 in) in 1945.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of San Diego Intl AP, at 1966. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1966 ran 0.5 C (0.8 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at San Diego Intl AP, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
1966-0.4-0.8likely5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Climate Twins

2011 to 2025 against 1961 to 1990

Over 2011 to 2025, San Diego Intl AP had a mean temperature of 18.4 C (65.0 F) and 232.1 mm (9.1 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are El Rosario (Mexico, 329 km away), Santa Ana Fire STN (United States, 129 km away) and Nuevo Rosarito (Mexico, 547 km away).

Climate twins of San Diego Intl AP: stations whose 1961 to 1990 climate is closest to its 2011 to 2025 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
El RosarioMexico329 km (204 mi)18.0 C (64.3 F)206.7 mm (8.1 in)0.64
Santa Ana Fire STNUnited States129 km (80 mi)18.2 C (64.7 F)318.3 mm (12.5 in)0.67
Nuevo RosaritoMexico547 km (340 mi)17.9 C (64.2 F)109.4 mm (4.3 in)0.84

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

  • Data for San Diego Intl AP standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for San Diego Intl AP 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.

Data as of . Last revised (2026-10-16).