City in Texas, United States
San Antonio weather by month and the best time to visit
When to go to San Antonio
Mar–May and Oct–Nov are warm and pleasant. Jun–Sep is very hot (35°C+); wildflowers peak in spring; Fiesta in April is busy; winters are mild.
San Antonio weather by month
Average daily high, rainfall and conditions.
- Jan17°49 mm
- Feb20°36 mm
- Mar24°61 mm
- Apr29°62 mm
- May32°100 mm
- Jun35°71 mm
- Jul36°71 mm
- Aug36°62 mm
- Sep32°95 mm
- Oct28°78 mm
- Nov23°49 mm
- Dec18°45 mm
Monthly averages
| Month | High | Low | Rain | Humidity | Conditions |
|---|---|---|---|---|---|
| January | 17°C63°F | 4°C40°F | 49 mm | 70% | Cool |
| February | 20°C68°F | 6°C44°F | 36 mm | 70% | Pleasant |
| March | 24°C76°F | 11°C51°F | 61 mm | 70% | Pleasant |
| April | 29°C84°F | 15°C59°F | 62 mm | 66% | Pleasant |
| May | 32°C89°F | 19°C67°F | 100 mm | 68% | Pleasant |
| June | 35°C95°F | 23°C73°F | 71 mm | 65% | Hot |
| July | 36°C96°F | 24°C75°F | 71 mm | 65% | Hot |
| August | 36°C97°F | 24°C76°F | 62 mm | 61% | Very hot |
| September | 32°C90°F | 21°C70°F | 95 mm | 68% | Pleasant |
| October | 28°C83°F | 16°C60°F | 78 mm | 68% | Pleasant |
| November | 23°C73°F | 10°C50°F | 49 mm | 70% | Pleasant |
| December | 18°C64°F | 6°C42°F | 45 mm | 69% | 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 Antonio?
Mar–May, Oct–Nov. Mar–May and Oct–Nov are warm and pleasant. Jun–Sep is very hot (35°C+); wildflowers peak in spring; Fiesta in April is busy; winters are mild.
When is the rainy season in San Antonio?
Rain peaks in May with about 100 mm. No month averages 150 mm or more.
What is the hottest month in San Antonio?
August, with average highs of 36°C (97°F).
How cold does San Antonio get?
The coolest nights are in January, averaging 4°C (40°F).
More about San Antonio
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Sources
- NASA POWER climatology (2001–2020)
- VIA Metropolitan Transit
- San Antonio International Airport
- Visit San Antonio
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 0.6°C for the city's elevation. Compiled and reviewed by SoloSquare. How we compile and score this. Spotted something out of date? Tell us.