Heat Advisory
* WHAT...High temperatures in the mid 80s near the beaches to the
lower to mid 90s for higher coastal terrain expected. Low
temperatures mostly in the 70s.
* WHERE...Orange County Coastal Areas.
* WHEN...Until 8 PM PDT Friday.
* IMPACTS...Hot temperatures may cause heat illnes…
Extreme Heat Warning
* WHAT...Dangerously hot conditions with high temperatures in the mid
90s to 105 expected. Low temperatures will be mostly in the 70s.
* WHERE...Orange County Inland Areas.
* WHEN...Until 8 PM PDT Friday.
* IMPACTS...Heat related illnesses increase significantly during
extreme…
Heat Advisory
* WHAT...High temperatures in the mid 80s near the beaches to the
lower to mid 90s for higher coastal terrain expected. Low
temperatures mostly in the 70s.
* WHERE...Orange County Coastal Areas.
* WHEN...Until 8 PM PDT Friday.
* IMPACTS...Heat related illnesses increase signif…
Tomorrow in Santa Ana looks
overcast, with a high of 93°
and an overnight low of 77°.
Precipitation chance is modest at 17%.
Winds top out near 8 mph,
and the UV index reaches 10 (very high).
Santa Ana runs on a dry-summer rhythm: the warmest months are also the driest. July averages 3 mm (0.1 in) while the wet season peaks in January at 2.8 inches (70 mm). Highs range from 66°F (19°C) to 85°F (29°C).
Santa Ana weather: quick facts
Hottest month: August - highs near 85°F (29°C)
Coldest month: January - highs near 66°F (19°C)
Decade extremes (2015-2024): 113°F (45°C) high · 36°F (2°C) low
Wettest month: January (5 rainy days) · Sunniest: July (13.3 h sun/day)
Climate type:semi-arid
Annual swing: 9°C between the average warmest and coolest month · day to night: 11°C
Average humidity: 67%
Temperatures through the year
January is the wettest month at 2.8 inches (70 mm) over 5 days; July is the driest. At its warmest, in August, Santa Ana runs to 85°F (29°C) in the afternoon and back to 64°F (18°C) by dawn. January sits at the other end of the year: 66°F (19°C) by day, 48°F (9°C) at night. July is the brightest month at 13.3 hours of sun a day, against an annual average of 10.8 - sunnier than 91% of the 3496 cities in our dataset.
Rain, sun and snow
Between the average August and the average January lie 9°C, a narrower spread than about 77% of the cities we track. Relative humidity averages 67% across the year, drier than about 75% of the cities we track. 8 months average under 20 mm of rain, the longest unbroken stretch running April through November. Across the gridded 2015-2024 daily record, the highest daily maximum for this location was 113°F (45°C) and the lowest daily minimum 36°F (2°C).
Season by season
Spring (March through May)
Spring in Santa Ana is mild and warm, with daytime highs averaging 71°F (22°C) and nights around 53°F (12°C); rain comes on about 13 days over the three months. Daylight is generous - around 11.3 hours of sun a day.
Summer (June through August)
Through summer, Santa Ana sits firmly in the heat: 82°F (28°C) by day, 62°F (17°C) after dark, and precipitation is sparse, near 14 mm (0.5 in) for the season. Daylight is generous - around 12.9 hours of sun a day.
Fall (September through November)
Fall is pleasantly warm here - highs near 79°F (26°C), nights near 59°F (15°C), and precipitation is sparse, near 1.5 inches (38 mm) for the season. Daylight is generous - around 10.3 hours of sun a day.
Winter (December through February)
Winter stays on the cool side of mild here - highs near 67°F (19°C), nights near 48°F (9°C), and rain comes 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.
January, with highs of 66°F (19°C) and lows near 48°F (9°C). The coldest day in the 2015-2024 record fell to 36°F (2°C).
When is the dry season in Santa Ana?
8 months average under 20 mm of rain, with July the driest at 3 mm (0.1 in).
Are nights cold in Santa Ana?
By about 11°C on an average day - a wider day-to-night gap than most of the 3496 cities we track. In August that means 85°F (29°C) down to 64°F (18°C).
Which month is wettest in Santa Ana?
January, at 2.8 inches (70 mm) over about 5 days. July is the driest month, at 3 mm (0.1 in).
What is the hottest month in Santa Ana?
August, averaging 85°F (29°C) by day and 64°F (18°C) overnight. The hottest single day in our 2015-2024 record for this location reached 113°F (45°C).
What is the best month to go to Santa Ana?
The best time to visit Santa Ana is generally January to June, when temperatures sit either side of the peak heat rather than in it. Daytime temperatures in that window sit near 71°F (22°C), with rain on about 4 days a month. For the same question asked the other way round, see where else is warm in January.
Does it snow in Santa Ana?
Effectively no. The 2015-2024 record for Santa Ana shows no regular measurable snowfall.