Weather in Santa Ana in December 2025
Average weather
Average temperature in Santa Ana in December
Going from a maximum of +82°F during the day to a minimum of +48°F during the night, the temperature in December averages around +72°F.
The average maximum temperature goes down 16% by the end of the month, compared with the beginning of the month, from +68°F to +63°F.
Is Santa Ana warm or cold in December?
Santa Ana is typically mild in December.
Maximum temperatures go down compared to the previous month from +70°F to +64°F. The minimum temperature also goes down from +54°F to +50°F.
Pack a light jacket as it will be warm in the day and cool in the evenings.
December is one of the coolest months in Santa Ana, here is the comparison with other months:
Climate in Santa Ana in December
| November | December | January | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +70°F | +64°F | +64°F | ||||
| Min. temperature | ||||||
| +43°F | +34°F | +34°F | ||||
| Max. temperature | ||||||
| +93°F | +84°F | +90°F | ||||
| Rainfall | ||||||
| 30 mm | 54 mm | 77 mm | ||||
| Wind | ||||||
| 1 m/s | 1 m/s | 1 m/s | ||||
| Humidity | ||||||
| 65% | 67% | 69% | ||||
| Air pressure | ||||||
| 1015 HPa | 1017 HPa | 1017 HPa | ||||
| Sunny days | ||||||
| 10 | 10 | 9 | ||||
| Cloudy days | ||||||
| 14 | 13 | 13 | ||||
| Rainy days | ||||||
| 6 | 9 | 9 | ||||
| Snowy days | ||||||
| 0 | 0 | 0 | ||||
December weather is still as good as in November. It’s getting colder in December. From +70°F in the day, the average maximum temperature lowers to +64°F. Prepare for more rain. Average rainfall goes from 30 mm to 54 mm. Humidity rises from 65% to 67%. The average wind speed doesn’t change much during December, staying around 1 m/s. The amount of sunny days stay about the same, averaging 10 sunny days during the month.
January brings much the same weather, it remains good.
Wind
The average wind speed is 1 m/s getting up to 2 m/s which is a light breeze; barely moving the tree leaves.
The average wind speed in Santa Ana is gradually increasing during December, going from 1 m/s to 1 m/s over the course of the month.
Rain
How was the weather last December in Santa Ana?
Climate Change Over the Years
The climate in Santa Ana in December has not changed that much over the last 43 years.
The average temperature was the lowest in 2001 (+68°F) and the highest in 2022 (+77°F). The driest year was 1989 with only 150 mm of rainfall, and the wettest year was 1983 with 898 mm.
FAQ
Is December a good time to visit Santa Ana?
Can you sunbathe in Santa Ana in December?
Is Santa Ana rainy in December?
Is it sunny in Santa Ana in December?
Other cities in USA
Monthly weather in Santa Ana
Source of the data
For this page, we’ve looked at the typical weather in Santa Ana, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.
