San Diego Weather in May
Average highs run from 30°C on May 1 to 29°C on May 31, and lows from 19°C to 19°C. Normal precipitation for the month is 106 mm over about 14 wet days.
May day by day
The normal high and low for each date, in °C.
- Normal low
- Normal high
- Reanalysis extreme high
- Reanalysis extreme low
May at a glance
- Average high
- 30°C
- Average low
- 19°C
- Precipitation
- 106 mm
- Reanalysis high
- 36°CMay 21, 2020
- Reanalysis low
- 16°CMay 23, 2008
- Daylight
- 12 h 30 min to 12 h 41 min
- Cloud cover
- 81%
- Humidity
- 77%
- Dew point
- 19°C
- Wind
- 5.8 km/h
Every day of the month
A wet day has at least 1 mm of precipitation in the reanalysis.
| Date | Normal high | Normal low | Reanalysis high | Reanalysis low | Chance wet |
|---|---|---|---|---|---|
| May 1 | 30°C | 19°C | 33°C 2010 | 17°C 2010 | 40% |
| May 2 | 30°C | 19°C | 34°C 2019 | 17°C 2000 | 40% |
| May 3 | 30°C | 19°C | 33°C 1995 | 18°C 2015 | 40% |
| May 4 | 30°C | 19°C | 33°C 2017 | 17°C 1991 | 39% |
| May 5 | 30°C | 19°C | 34°C 2019 | 17°C 1999 | 40% |
| May 6 | 30°C | 19°C | 34°C 2019 | 17°C 1999 | 40% |
| May 7 | 30°C | 19°C | 34°C 2019 | 16°C 1995 | 40% |
| May 8 | 30°C | 19°C | 33°C 1995 | 18°C 2000 | 40% |
| May 9 | 30°C | 19°C | 34°C 2020 | 18°C 1995 | 40% |
| May 10 | 30°C | 19°C | 34°C 2020 | 18°C 2014 | 40% |
| May 11 | 30°C | 19°C | 34°C 2020 | 17°C 2014 | 40% |
| May 12 | 30°C | 19°C | 33°C 2020 | 16°C 2013 | 41% |
| May 13 | 30°C | 19°C | 33°C 1998 | 17°C 2008 | 43% |
| May 14 | 30°C | 19°C | 33°C 2008 | 17°C 2008 | 42% |
| May 15 | 30°C | 19°C | 34°C 2019 | 17°C 2008 | 43% |
| May 16 | 30°C | 19°C | 34°C 2019 | 18°C 2018 | 43% |
| May 17 | 30°C | 19°C | 33°C 2000 | 18°C 1999 | 43% |
| May 18 | 30°C | 19°C | 33°C 2020 | 17°C 1995 | 44% |
| May 19 | 30°C | 19°C | 34°C 2009 | 17°C 2000 | 46% |
| May 20 | 30°C | 19°C | 33°C 2020 | 18°C 2000 | 47% |
| May 21 | 30°C | 19°C | 36°C 2020 | 18°C 2004 | 48% |
| May 22 | 29°C | 19°C | 32°C 2008 | 17°C 2006 | 48% |
| May 23 | 29°C | 19°C | 35°C 2020 | 16°C 2008 | 49% |
| May 24 | 29°C | 19°C | 36°C 2020 | 17°C 2001 | 49% |
| May 25 | 29°C | 19°C | 35°C 2020 | 18°C 1999 | 49% |
| May 26 | 29°C | 19°C | 34°C 2020 | 18°C 1995 | 49% |
| May 27 | 29°C | 19°C | 33°C 2006 | 18°C 2000 | 48% |
| May 28 | 29°C | 19°C | 32°C 1996 | 18°C 1996 | 46% |
| May 29 | 29°C | 19°C | 32°C 1999 | 18°C 2008 | 46% |
| May 30 | 29°C | 19°C | 32°C 2006 | 17°C 2001 | 43% |
| May 31 | 29°C | 19°C | 33°C 2008 | 18°C 2009 | 42% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (GMT-5).
- May 1
- sunrise 5:35 AM, sunset 6:05 PM
- May 31
- sunrise 5:30 AM, sunset 6:11 PM
Other months
Sources
Cloud, humidity, wind and sunshine, and temperature and precipitation: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-26. Sun and moon: computed with the NOAA solar equations and Meeus.