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Santa Ana Weather by Month
Average temperatures, rainfall and humidity for Santa Ana, United States, month by month, built from OpenWeather’s historical records. Use it to see what a typical Santa Ana month looks like before you travel — then check the live Santa Ana forecast for the days ahead.
Warmest month
August
30°C average high
Coolest month
January
9°C average low
Wettest month
October
95 mm of rain
Driest month
July
5 mm of rain
Average temperature and rainfall in Santa Ana by month
Averages of the daily highs and lows recorded in each month, with total rainfall, mean humidity and mean wind speed.
| Month | Avg high | Avg low | Record low / high | Rainfall | Humidity | Wind |
|---|---|---|---|---|---|---|
| January | 20°C | 9°C | -4°C / 32°C | 57 mm | 62% | 8 km/h |
| February | 20°C | 10°C | -1°C / 34°C | 55 mm | 62% | 8 km/h |
| March | 21°C | 11°C | 3°C / 36°C | 52 mm | 67% | 9 km/h |
| April | 23°C | 12°C | 5°C / 37°C | 15 mm | 65% | 10 km/h |
| May | 23°C | 14°C | 5°C / 38°C | 20 mm | 70% | 10 km/h |
| June | 26°C | 16°C | 10°C / 43°C | 12 mm | 72% | 9 km/h |
| July | 29°C | 19°C | 12°C / 42°C | 5 mm | 71% | 9 km/h |
| August | 30°C | 19°C | 11°C / 40°C | 10 mm | 70% | 9 km/h |
| September | 29°C | 18°C | 8°C / 43°C | 9 mm | 69% | 8 km/h |
| October | 27°C | 15°C | 5°C / 39°C | 95 mm | 65% | 7 km/h |
| November | 23°C | 12°C | 2°C / 34°C | 23 mm | 60% | 8 km/h |
| December | 20°C | 10°C | -3°C / 29°C | 56 mm | 64% | 7 km/h |
Best time to visit Santa Ana
The most comfortable time to visit Santa Ana is generally April to May and November, balancing mild daytime temperatures against the driest stretch of the year. The city has a moderate seasonal swing and rain concentrates around October, totalling about 409 mm a year.
Travellers who prefer heat should aim for August, when highs average 30°C. October is the month to avoid if rain would spoil your plans — it averages 95 mm, roughly 19× the rainfall of the driest month (July).
Source: OpenWeather historical and statistical weather data. Values are long-term averages, not a forecast — see the Santa Ana forecast for what is happening now.