San Diego International Airport

KSAN · California, United States

Climate San Diego International Airport 2021-2025

Climate and trends: average temperature, flight conditions, precipitation, wind speed and direction.

Calculated from historical METAR data of San Diego International Airport (KSAN) between 2021 and 2025.

VFR conditions (%)

Month Average 2025 2024 2023 2022 2021
January 83.8 91 75 72 92 87
February 83.2 75 87 93 75
March 80.1 82 69 80 83
April 71.4 75 57 75 67
May 50.5 33 37 52 40
June 47.8 40 47 60 48
July 64.9 63 71 56 65
August 70.1 77 65 79 68
September 70.4 61 58 83 70
October 77.6 68 76 59 80
November 86.9 93 87 85 80
December 84.7 70 87 88 73
Average 73.8 90.9 66.6 66.6 73.6 68.7

VFR conditions during daylight period

Percentage of observations where the VFR minimums for ceiling and visibility are met: visibility of 5 mi or more and a ceiling of 3,000 ft or more. Only observations between sunrise and sunset are taken into account.

Marginal VFR conditions (%)

Month Average 2025 2024 2023 2022 2021
January 95.1 97 90 93 98 97
February 95.4 93 98 98 95
March 94.3 93 86 96 98
April 95.4 98 88 98 96
May 96.4 100 89 98 98
June 91.6 92 99 90 85
July 91.8 85 86 93 95
August 92.4 94 85 99 92
September 94.7 90 97 92 97
October 93.4 81 88 92 98
November 95.6 97 98 95 93
December 95.0 84 98 96 94
Average 94.5 97.3 91.1 91.6 95.2 94.7

Marginal VFR conditions or better during daylight period

Percentage of observations where the MVFR minimums for ceiling and visibility are met: visibility of 3⅛ mi or more and a ceiling of 1,000 ft or more. Only observations between sunrise and sunset are taken into account.

Maximum temperatures (°C)

Month Average 2025 2024 2023 2022 2021
January 18.8 19.1 17.8 17.1 19.1 19.6
February 18.6 17.3 17.6 20.3 19.3
March 19.0 18.3 17.1 19.6 19.0
April 20.4 19.1 18.8 20.6 21.0
May 20.1 19.3 18.8 19.3 20.3
June 21.7 21.6 20.5 21.3 22.3
July 24.3 24.3 23.6 22.8 24.8
August 25.6 25.6 24.6 26.0 25.3
September 25.4 24.8 23.8 27.1 25.0
October 24.1 22.5 23.3 22.8 23.6
November 21.9 21.1 22.1 20.1 22.8
December 19.0 18.8 20.0 16.8 16.5
Average 21.3 19.1 20.9 20.6 21.5 21.6

Average highest temperature per day

The maximum temperature is typically observed some hours after noon.

Minimum temperatures (°C)

Month Average 2025 2024 2023 2022 2021
January 10.0 8.1 9.4 9.5 9.0 9.5
February 10.4 11.4 8.4 8.0 10.8
March 12.1 12.1 10.6 11.1 11.1
April 14.1 13.0 12.5 13.4 14.4
May 15.6 15.3 15.0 14.4 16.1
June 17.2 17.5 16.3 16.6 17.8
July 19.6 19.1 18.6 18.6 20.5
August 20.4 19.8 18.8 21.0 20.5
September 19.8 19.8 19.3 21.1 19.8
October 16.5 16.1 15.8 17.3 15.3
November 12.4 10.6 11.1 10.0 13.4
December 10.1 10.1 10.5 8.8 10.1
Average 14.1 8.1 14.5 13.9 14.3 15.0

Average lowest temperature per day

The minimum temperature is typically observed just before sunrise.

Precipitation (%)

Month Average 2025 2024 2023 2022 2021
January 5.8 1 9 13 1 4
February 5.5 11 6 3 0
March 5.4 8 13 2 5
April 1.6 1 1 1 1
May 2.0 1 1 0 2
June 0.8 0 2 1 1
July 0.0 0 0 0 0
August 0.7 0 4 0 1
September 1.3 0 5 4 1
October 0.5 0 0 1 1
November 1.8 0 1 5 0
December 3.5 0 2 6 8
Average 2.1 0.6 2.4 4.0 1.7 1.9

Precipitation during daylight period

Percentage of observations with observed rain, drizzle, snow or hail. Only observations between sunrise and sunset are taken into account.

Wind speed (knots)

Month Average 2025 2024 2023 2022 2021
January 5.3 5 5 7 4 5
February 6.3 6 7 6 5
March 6.6 7 7 7 7
April 6.7 7 7 7 7
May 6.9 6 6 7 7
June 6.3 6 6 6 6
July 6.4 6 6 6 6
August 6.6 6 7 7 7
September 6.5 6 6 6 6
October 5.7 6 6 5 6
November 5.3 5 5 6 5
December 4.6 4 4 5 6
Average 6.0 4.9 5.9 6.1 6.0 6.1

Average wind speed

Excluding wind gusts. Only observations between sunrise and sunset are taken into account.

Prevailing wind direction

Month 2025 2024 2023 2022 2021
January 284° 271° 230° 282° 278°
February 248° 263° 280° 276°
March 251° 250° 257° 266°
April 270° 271° 270° 271°
May 258° 260° 234° 244°
June 242° 283° 247° 260°
July 271° 272° 267° 274°
August 267° 285° 278° 278°
September 279° 278° 274° 286°
October 282° 284° 271° 278°
November 292° 279° 256° 300°
December 291° 274° 281° 260°

Prevailing wind direction

Average wind direction, weighed by wind speed. Only observations between sunrise and sunset are taken into account.