Heat Advisory
* WHAT...High temperatures in the mid 90s to 105 expected.
* WHERE...San Bernardino and Riverside County Valleys-The Inland
Empire.
* WHEN...Until 8 PM PDT Sunday.
* IMPACTS...Hot temperatures may cause heat illnesses.
Extreme Heat Warning
* WHAT...Dangerously hot conditions with high temperatures of 108 to
114 expected.
* WHERE...Coachella Valley, San Diego County Deserts, and San
Gorgonio Pass near Banning.
* WHEN...Until 8 PM PDT Sunday.
* IMPACTS...Heat related illnesses increase significantly during
extreme…
Heat Advisory
* WHAT...High temperatures mostly in the mid 80s to low 100s below
6500 feet expected.
* WHERE...Riverside County Mountains.
* WHEN...Until 8 PM PDT Saturday.
* IMPACTS...Hot temperatures may cause heat illnesses.
Tomorrow in Santa Ana looks
sunny, with a high of 85°
and an overnight low of 72°.
Rain is unlikely (3% chance).
Winds top out near 10 mph,
and the UV index reaches 10 (very high).
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
Monthly averages for Santa Ana based on 2015–2024 weather data.
August is the hottest month in Santa Ana, with average highs of 85°F (29°C) and overnight lows near 64°F (18°C). In the past decade the temperature has peaked at 113°F (45°C).
What is the coldest month in Santa Ana?
January is the coldest month, with highs averaging 66°F (19°C) and lows around 48°F (9°C). The lowest reading in recent years was 36°F (2°C).
What is the rainiest month in Santa Ana?
January is typically the wettest month, averaging 2.8 inches (70 mm) of precipitation across about 5 days. July is usually the driest.
Does it snow in Santa Ana?
Snow is essentially absent in Santa Ana - the 2015–2024 record shows no regular measurable snowfall.
What is the 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).
How sunny is Santa Ana?
Santa Ana averages 10.8 hours of sunshine per day across the year. July is the sunniest month at about 13.3 hours of sun a day.
Is Santa Ana humid?
Relative humidity in Santa Ana averages about 67% over the year, which feels moderate. The most comfortable months tend to fall in the drier part of the year.