Yearly weather and climate in San Antonio, United States

The yearly weather in San Antonio runs from around 7°C in January to 38°C in August. August is the driest month at 3 rainy days; May the wettest at 15. Here is the annual climate data, so you know what you are packing for.

Best time to visit

The best weather is typically in Feb, Oct, with mild temperatures and lower rainfall.

Sunshine

Expect up to 12.4 hours of clear skies in Aug, but only 7.1 hours in Dec. Pack sunglasses and SPF accordingly.

Rainfall

It rains the most in May (201mm over 15 days). A reliable rain jacket is a must-have if visiting then.

Day-to-night swings

Temperatures typically drop by 11°C from day to night. Make sure to pack layers for the evenings.

Average temperatures and rainfall

Daily highs and lows in San Antonio, averaged over 10 years of recorded weather, with the number of days it typically rains.

  1. 1864°744°9Jan
  2. 2170°1050°6Feb
  3. 2577°1457°11Mar
  4. 2781°1762°14Apr
  5. 3087°2169°15May
  6. 3696°2476°10Jun
  7. 3697°2577°9Jul
  8. 38100°2679°3Aug
  9. 3594°2475°6Sep
  10. 3086°1966°7Oct
  11. 2373°1355°9Nov
  12. 2069°1050°9Dec

Bars span the average daily low to high. Numbers under the drop are rainy days per month (1mm or more) — hover a month for its total rainfall. Aug is typically driest at 3 days (15mm); May the wettest at 15 days (201mm).

Average monthly temperature and rainfall in San Antonio
MonthAverage highAverage lowRainy daysTotal rainfall
Jan18°C7°C974mm
Feb21°C10°C655mm
Mar25°C14°C1167mm
Apr27°C17°C14120mm
May30°C21°C15201mm
Jun36°C24°C1075mm
Jul36°C25°C956mm
Aug38°C26°C315mm
Sep35°C24°C642mm
Oct30°C19°C798mm
Nov23°C13°C955mm
Dec20°C10°C948mm

Weather data by Open-Meteo.com

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