CA · climate averages
San Diego Weather by Month
These are climate averages, not a forecast. Station San Diego Lindbergh FLD (USW00023188), 6.5 miles from downtown, elevation 15 ft.
San Diego's warmest month is August (avg high 77.3°F), coldest is December (avg low 49.8°F) and wettest is February (2.20 in), per NOAA 1991–2020 climate normals.
- Warmest high August 77.3°F
- Coldest low December 49.8°F
- Wettest month February 2.20 in
- Year of rain 12 months 9.79 in
Monthly Averages
San Diego's 12 monthly precipitation normals add up to 9.79 inches a year.
August is the driest month, with a precipitation normal of 0.01 inches.
San Diego averages 40.3 days a year with at least 0.01 inch of precipitation.
| Month | Avg high | Avg low | Precipitation | Days ≥ 0.01 in |
|---|---|---|---|---|
| January | 66.4°F | 50.3°F | 1.98 in | 6.5 |
| February | 66.2°F | 51.8°F | 2.20 in | 7.1 |
| March | 67.0°F | 54.5°F | 1.46 in | 6.2 |
| April | 68.8°F | 57.1°F | 0.65 in | 3.8 |
| May | 69.5°F | 60.0°F | 0.28 in | 2.2 |
| June | 71.7°F | 62.6°F | 0.05 in | 0.7 |
| July | 75.3°F | 66.1°F | 0.08 in | 0.7 |
| August | 77.3°F | 67.5°F | 0.01 in | 0.3 |
| September | 77.2°F | 66.2°F | 0.12 in | 0.9 |
| October | 74.6°F | 61.5°F | 0.50 in | 2.4 |
| November | 70.7°F | 54.8°F | 0.79 in | 3.7 |
| December | 66.0°F | 49.8°F | 1.67 in | 5.8 |
Warmest, Coldest and Wettest Months
The warmest month is August, with an average high of 77.3°F.
The coldest month is December, with an average low of 49.8°F.
The wettest month is February, at 2.20 inches of precipitation over about 7.1 days.
No month in San Diego reaches an average high of 80°F. The highest is 77.3°F in August.
In San Diego, the warmest average high is only 27.5°F above the coldest average low.
In August, the average high in San Diego is 9.8°F above the average low.
Best Months to Visit San Diego for Weather
April, May, June, July, August, September, October and November meet the weather rule on this page: an average high from 65 to 85°F and precipitation below 0.82 inches.
The rule keeps a month when the average high is from 65 to 85°F and precipitation is below 0.82 inches, the mean of the twelve monthly precipitation normals.
- April · 68.8°F
- May · 69.5°F
- June · 71.7°F
- July · 75.3°F
- August · 77.3°F
- September · 77.2°F
- October · 74.6°F
- November · 70.7°F
Nearby cities
Los Angeles is the closest other city on this site, 105.4 miles away. Its July average high is 82.0°F, 6.7°F warmer than San Diego.
| City | Miles | Avg high | Avg low | Precipitation |
|---|---|---|---|---|
| Los Angeles | 105.4 | 82.0°F | 64.7°F | 0.02 in |
| San Francisco | 453.0 | 66.3°F | 54.4°F | 0.01 in |
About This Data
Source: NOAA National Centers for Environmental Information (NCEI), U.S. Climate Normals 1991–2020. Station: SAN DIEGO LINDBERGH FLD (USW00023188), 6.5 mi from downtown, elevation 15 ft. Climate normals are 30-year averages, not forecasts. MonthSky is not affiliated with NOAA.
Palecki, Michael; Durre, Imke; Applequist, Scott; Arguez, Anthony; Lawrimore, Jay (2021). U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991-2020). NOAA National Centers for Environmental Information. Dataset. https://doi.org/10.25921/wck8-er13. Accessed 2026-10-21.
U.S. Government work.
NOAA and NCEI cannot provide any warranty as to the accuracy, reliability, or completeness of furnished data. Users assume responsibility to determine the usability of these data. The user is responsible for the results of any application of this data for other than its intended purpose.
NOAA and NCEI make no warranty, expressed or implied, regarding these data, nor does the fact of distribution constitute such a warranty. NOAA and NCEI cannot assume liability for any damages caused by any errors or omissions in these data. If appropriate, NCEI can only certify that the data it distributes are an authentic copy of the records that were accepted for inclusion in the NCEI archives.
These pages are built automatically from public NOAA data.
U.S. Monthly Climate Normals (1991-2020) dataset
NCEI dataset landing page for the monthly normals
FAQ
What is the hottest month in San Diego?
August is the warmest, with an average high of 77.3°F.
What is the wettest month in San Diego?
February is the wettest, at 2.20 inches over about 7.1 days.
How many rainy days does San Diego get a year?
The monthly counts of days with at least 0.01 inch of precipitation add up to 40.3 days.
When is the best time to visit San Diego for weather?
April, May, June, July, August, September, October and November meet the rule used on this page: average high from 65 to 85°F and precipitation below the monthly mean of 0.82 inches.