City in California, United States
San Diego weather by month and the best time to visit
When to go to San Diego
Spring and fall have warm days and clear skies. May–June has 'May Gray' coastal fog; Jul–Aug is busiest and warmest; Dec–Mar is cooler with occasional rain.
San Diego weather by month
Average daily high, rainfall and conditions.
- Jan19°41 mm
- Feb20°55 mm
- Mar21°29 mm
- Apr22°17 mm
- May25°7 mm
- Jun28°14 mm
- Jul31°4 mm
- Aug32°4 mm
- Sep31°6 mm
- Oct27°15 mm
- Nov23°25 mm
- Dec19°51 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 19°C67°F | 10°C50°F | 41 mm | 64% | Pleasant |
| February | 20°C67°F | 10°C50°F | 55 mm | 66% | Pleasant |
| March | 21°C70°F | 11°C52°F | 29 mm | 68% | Pleasant |
| April | 22°C72°F | 12°C54°F | 17 mm | 68% | Pleasant |
| May | 25°C76°F | 14°C56°F | 7 mm | 68% | Pleasant |
| June | 28°C82°F | 15°C60°F | 14 mm | 63% | Pleasant |
| July | 31°C88°F | 19°C65°F | 4 mm | 58% | Pleasant |
| August | 32°C89°F | 19°C67°F | 4 mm | 57% | Pleasant |
| September | 31°C87°F | 19°C66°F | 6 mm | 57% | Pleasant |
| October | 27°C80°F | 16°C61°F | 15 mm | 60% | Pleasant |
| November | 23°C73°F | 13°C56°F | 25 mm | 60% | Pleasant |
| December | 19°C66°F | 10°C50°F | 51 mm | 64% | Pleasant |
Best months across United States
| Place | Best months | Warmest month |
|---|---|---|
| New York City | Apr–Jun, Sep–Oct | Jul (26°C) |
| Las Vegas | Mar–May, Oct–Nov | Jul (42°C) |
| Los Angeles | Mar–May, Sep–Nov | Aug (32°C) |
| Orlando | Feb–Apr, Nov | May (31°C) |
| Miami | Nov–Apr | Aug (30°C) |
| San Francisco | Apr–May, Sep–Oct | Sep (24°C) |
| Honolulu | Apr–Jun, Sep–Oct | Sep (28°C) |
| Washington, D.C. | Mar–May, Sep–Oct | Jul (31°C) |
| Chicago | May–Jun, Sep–Oct | Jul (25°C) |
| Boston | May–Jun, Sep–Oct | Jul (28°C) |
| New Orleans | Feb–Apr, Oct–Nov | Jul (30°C) |
| San Diego | Apr–May, Sep–Nov | Aug (32°C) |
| Seattle | Jun–Sep | Aug (24°C) |
| Maui | Apr–May, Sep–Oct | Sep (22°C) |
| Nashville | Apr–May, Sep–Oct | Aug (32°C) |
| Austin | Mar–May, Oct–Nov | Aug (36°C) |
| Miami Beach | Nov–Apr | Aug (30°C) |
| Key West | Dec–Apr | Aug (30°C) |
| Denver | May–Jun, Sep–Oct | Jul (33°C) |
| Philadelphia | Apr–May, Sep–Oct | Jul (30°C) |
| Portland | Jun–Sep | Aug (29°C) |
| Atlanta | Mar–May, Oct–Nov | Jul (32°C) |
| San Antonio | Mar–May, Oct–Nov | Aug (36°C) |
| Charleston | Mar–May, Oct–Nov | Jul (32°C) |
| Savannah | Mar–May, Oct–Nov | Jul (33°C) |
| Fort Lauderdale | Dec–Apr | Aug (30°C) |
| Kauai | Apr–Jun, Sep–Oct | Sep (27°C) |
| Big Island | Apr–Jun, Sep–Oct | Aug (26°C) |
| Sedona | Mar–May, Sep–Nov | Jul (35°C) |
| Scottsdale | Feb–Apr, Oct–Nov | Jul (42°C) |
Quick answers
What is the best month to visit San Diego?
Apr–May, Sep–Nov. Spring and fall have warm days and clear skies. May–June has 'May Gray' coastal fog; Jul–Aug is busiest and warmest; Dec–Mar is cooler with occasional rain.
When is the rainy season in San Diego?
Rain peaks in February with about 55 mm. No month averages 150 mm or more.
What is the hottest month in San Diego?
August, with average highs of 32°C (89°F).
How cold does San Diego get?
The coolest nights are in January, averaging 10°C (50°F).
More about San Diego
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Sources
- NASA POWER climatology (2001–2020)
- San Diego Metropolitan Transit System (MTS)
- San Diego International Airport
- San Diego Tourism Authority
- City of San Diego Public Utilities (water)
Climate averages are modelled from NASA POWER (MERRA-2) for 2001–2020 at about 50 km resolution, so coasts and valleys can differ a little. Temperatures are adjusted by 2.4°C for the city's elevation. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.