Santa Ana, CA Weather
Santa Ana hourly forecast: next 24 hours
Today's high of 88°F (31°C) is about 3°F (2°C) above the typical August high of 85°F (29°C).
Current conditions in detail
Santa Ana weather tomorrow (Tuesday, August 18)
Tomorrow in Santa Ana looks patchy rain nearby, with a high of 55° and an overnight low of 54°. There is a 57% chance of rain - plan accordingly. Winds top out near 15 mph, and the UV index reaches 10 (very high).
Santa Ana 14-day forecast
About the weather in Santa Ana
Weather in Santa Ana is shaped by its semi-arid climate - expect big day-to-night temperature swings and modest rainfall. August afternoons typically reach 85°F (29°C), while January highs hover near 66°F (19°C). Annual precipitation averages 12.7 inches (322 mm) over about 34 rainy days.
Santa Ana weather: quick facts
- Hottest month: August - highs near 85°F (29°C)
- Coldest month: January - highs near 66°F (19°C)
- Record high: 113°F (45°C) · Record low: 36°F (2°C) (2015–2024)
- Wettest month: January (5 rainy days) · Sunniest: July (13.3 h sun/day)
- Climate type: semi-arid - big day-to-night temperature swings and modest rainfall
Temperatures through the year
The warmest stretch of the year centers on August. Highs average 85°F (29°C) and overnight lows stay near 64°F (18°C). The coolest month is January, with typical highs of 66°F (19°C) and lows around 48°F (9°C). Based on 2015–2024 weather data, temperatures have reached as high as 113°F (45°C) and dropped as low as 36°F (2°C).
Rain, sun and snow
January is usually the wettest month. It brings about 2.8 inches (70 mm) of rain over 5 days, while July is the driest. July brings the most sunshine, averaging 13.3 hours of sun a day.
Season by season
Spring (March through May)
Spring in Santa Ana brings comfortable warmth, with daytime highs averaging 71°F (22°C) and nights around 53°F (12°C); rain falls on about 13 days over the three months.
Summer (June through August)
Summer in Santa Ana is hot, with daytime highs averaging 82°F (28°C) and nights around 62°F (17°C); precipitation is infrequent.
Fall (September through November)
Fall in Santa Ana brings comfortable warmth, with daytime highs averaging 79°F (26°C) and nights around 59°F (15°C); precipitation is infrequent.
Winter (December through February)
Winter in Santa Ana stays on the cool side of mild, with daytime highs averaging 67°F (19°C) and nights around 48°F (9°C); rain falls on about 15 days over the three months.
Average temperatures in Santa Ana by month
| Month | High | Low | Rain days | Precipitation | Sunshine | Humidity |
|---|---|---|---|---|---|---|
| January | 66° | 48° | 5 | 2.8 in | 8.4 h/day | 67% |
| February | 67° | 48° | 5 | 2.1 in | 9.1 h/day | 63% |
| March | 68° | 50° | 7 | 2.0 in | 10.4 h/day | 69% |
| April | 73° | 54° | 2 | 0.7 in | 11.4 h/day | 66% |
| May | 73° | 56° | 3 | 0.4 in | 12.0 h/day | 70% |
| June | 79° | 60° | 0 | 0.2 in | 13.0 h/day | 71% |
| July | 83° | 63° | 0 | 0.1 in | 13.3 h/day | 72% |
| August | 85° | 64° | 0 | 0.3 in | 12.3 h/day | 72% |
| September | 84° | 64° | 1 | 0.4 in | 11.3 h/day | 70% |
| October | 80° | 60° | 2 | 0.4 in | 10.2 h/day | 64% |
| November | 74° | 53° | 2 | 0.7 in | 9.5 h/day | 56% |
| December | 67° | 49° | 5 | 2.6 in | 8.2 h/day | 63% |