Santa Ana, CA Climate & Monthly Averages
The climate of 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.
Climate 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.
Monthly climate table
| 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% |
Santa Ana month by month
Santa Ana weather in January
January brings highs around 66°F (19°C), lows near 48°F (9°C), about 5 wet days - typically the coldest month and the wettest month of the year in Santa Ana.
Santa Ana weather in February
February brings highs around 67°F (20°C), lows near 48°F (9°C), about 5 wet days.
Santa Ana weather in March
March brings highs around 68°F (20°C), lows near 50°F (10°C), about 7 wet days.
Santa Ana weather in April
April brings highs around 73°F (23°C), lows near 54°F (12°C), about 2 wet days.
Santa Ana weather in May
May brings highs around 73°F (23°C), lows near 56°F (13°C), about 3 wet days.
Santa Ana weather in June
June brings highs around 79°F (26°C), lows near 60°F (15°C), about 0 wet days.
Santa Ana weather in July
July brings highs around 83°F (28°C), lows near 63°F (17°C), about 0 wet days - typically the driest month and the sunniest month of the year in Santa Ana.
Santa Ana weather in August
August brings highs around 85°F (29°C), lows near 64°F (18°C), about 0 wet days - typically the hottest month of the year in Santa Ana.
Santa Ana weather in September
September brings highs around 84°F (29°C), lows near 64°F (18°C), about 1 wet days.
Santa Ana weather in October
October brings highs around 80°F (27°C), lows near 60°F (16°C), about 2 wet days.
Santa Ana weather in November
November brings highs around 74°F (23°C), lows near 53°F (12°C), about 2 wet days.
Santa Ana weather in December
December brings highs around 67°F (19°C), lows near 49°F (9°C), about 5 wet days.
Seasons in Santa Ana
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.
Climate questions, answered
What is the average temperature in Santa Ana?
Is Santa Ana hot in summer?
Is Santa Ana cold in winter?
How many rainy days does Santa Ana get in a year?
Best time to visit Santa Ana
The best time to visit Santa Ana is generally January to June, when temperatures are at their most comfortable before or after the peak heat. Daytime temperatures in that window typically sit near 71°F (22°C).
Pack for Santa Ana with light layers that can adapt to mild swings through the day. Evenings can feel noticeably cooler than afternoons - August nights average 64°F (18°C).
Santa Ana temperature records (2015-2024)
Derived from ERA5 reanalysis data, 2015–2024. Official station records may differ.