Santa Ana climate
Santa Ana is warmest in August, with average highs of 27 °C, and coldest in December, when nights average 8.4 °C. February is the wettest month (89 mm) and August the driest (0.8 mm). Figures are 1991–2020 climate normals.
Across a full year Santa Ana averages 355 mm of rain and 100 days above 25 °C.
United States · 35 m elevation · population 310,227 · 1991–2020 normals
Temperature below 0 °C to above 30 °C Rain band height is that month’s share of the wettest month
- Warmest month August 27 °C
- Coldest month December 8.4 °C
- Driest month August 1 mm
- Wettest month February 89 mm
- Least cloud August 17 % cloud
- Hottest on record July 45 °C
- Coldest on record December 0.3 °C
- Warmest sea August 21 °C
What to expectSanta Ana through the year
Santa Ana has a clear annual cycle: average daily highs run from 18 °C in December to 27 °C in August, a swing of 9.3 °C in mean temperature across the year.
Counted across a normal year, 100 days a year reach 25 °C, 16 of them reach 30 °C. The warmest reading in the 1991–2020 record is 45 °C, in July.
Rain is strongly seasonal. February averages 89 mm against 1 mm in August — 114 times as much. Planning around the dry months matters more here than planning around temperature.
The sea off Santa Ana is warmest in August at 21 °C and coldest in February at 15 °C. Sea temperature lags the air by a month or two, which is why late summer swims warmer than early summer at the same air temperature.
Month by month
| Month | Avg high | Rainfall | Cloud |
|---|---|---|---|
| January | 18.0 °C | 75 mm | 47 % |
| February | 18.1 °C | 89 mm | 48 % |
| March | 18.9 °C | 55 mm | 48 % |
| April | 20.5 °C | 23 mm | 39 % |
| May | 21.5 °C | 9 mm | 38 % |
| June | 23.6 °C | 2 mm | 26 % |
| July | 26.0 °C | 2 mm | 22 % |
| August | 27.1 °C | 1 mm | 17 % |
| September | 26.6 °C | 4 mm | 21 % |
| October | 24.3 °C | 17 mm | 30 % |
| November | 21.1 °C | 23 mm | 36 % |
| December | 17.9 °C | 55 mm | 43 % |
Temperature month by month
| Month | Avg high | Avg low | Mean | Record high | Record low | Days above 25 °C | Days above 30 °C | Days below 0 °C |
|---|---|---|---|---|---|---|---|---|
| January | 18.0 °C | 8.4 °C | 12.6 °C | 32.7 °C | 0.6 °C | 1 | 0 | 0 |
| February | 18.1 °C | 9.0 °C | 13.0 °C | 30.6 °C | 2.1 °C | 1 | 0 | 0 |
| March | 18.9 °C | 10.3 °C | 14.1 °C | 30.5 °C | 3.7 °C | 2 | 0 | 0 |
| April | 20.5 °C | 11.6 °C | 15.5 °C | 37.0 °C | 4.9 °C | 4 | 1 | 0 |
| May | 21.5 °C | 13.5 °C | 17.0 °C | 34.8 °C | 8.5 °C | 4 | 1 | 0 |
| June | 23.6 °C | 15.2 °C | 18.8 °C | 36.8 °C | 10.5 °C | 8 | 1 | 0 |
| July | 26.0 °C | 17.4 °C | 21.1 °C | 45.1 °C | 12.7 °C | 19 | 2 | 0 |
| August | 27.1 °C | 18.1 °C | 21.9 °C | 40.9 °C | 13.5 °C | 24 | 4 | 0 |
| September | 26.6 °C | 17.7 °C | 21.4 °C | 42.4 °C | 12.5 °C | 20 | 4 | 0 |
| October | 24.3 °C | 15.2 °C | 19.1 °C | 40.8 °C | 8.5 °C | 12 | 3 | 0 |
| November | 21.1 °C | 11.4 °C | 15.7 °C | 36.3 °C | 3.0 °C | 4 | 1 | 0 |
| December | 17.9 °C | 8.4 °C | 12.6 °C | 29.6 °C | 0.3 °C | 1 | 0 | 0 |
Rain, sun and wind month by month
| Month | Rainfall | Wet days | Daylight | Cloud cover | Humidity | Wind | Sea temp |
|---|---|---|---|---|---|---|---|
| January | 75 mm | 6 | 10 h/day | 47 % | 74 % | 12 km/h | 15.1 °C |
| February | 89 mm | 6 | 11 h/day | 48 % | 75 % | 14 km/h | 15.0 °C |
| March | 55 mm | 6 | 12 h/day | 48 % | 76 % | 15 km/h | 15.2 °C |
| April | 23 mm | 3 | 13 h/day | 39 % | 72 % | 16 km/h | 15.7 °C |
| May | 9 mm | 2 | 14 h/day | 38 % | 73 % | 15 km/h | 17.0 °C |
| June | 2 mm | 0 | 14 h/day | 26 % | 73 % | 14 km/h | 18.5 °C |
| July | 2 mm | 0 | 14 h/day | 22 % | 73 % | 14 km/h | 20.2 °C |
| August | 1 mm | 0 | 13 h/day | 17 % | 73 % | 14 km/h | 20.7 °C |
| September | 4 mm | 1 | 12 h/day | 21 % | 73 % | 13 km/h | 20.5 °C |
| October | 17 mm | 2 | 11 h/day | 30 % | 71 % | 13 km/h | 19.3 °C |
| November | 23 mm | 3 | 10 h/day | 36 % | 70 % | 12 km/h | 17.6 °C |
| December | 55 mm | 5 | 9.9 h/day | 43 % | 72 % | 12 km/h | 15.8 °C |
How Santa Ana compares
The same four figures for nearby destinations, so the numbers above have something to be read against. Summer high is the warmest month's average high; winter low is the coldest month's average low.
| Destination | Summer high | Winter low | Rain per year | Days above 25 °C |
|---|---|---|---|---|
| Santa Ana | 27 °C | 8.4 °C | 355 mm | 100 |
| Irvine · United States | 28 °C | 8.6 °C | 363 mm | 125 |
| Anaheim · United States | 29 °C | 7.1 °C | 317 mm | 142 |
| Huntington Beach · United States | 26 °C | 8.4 °C | 310 mm | 84 |
| Long Beach · United States | 28 °C | 7.8 °C | 291 mm | 111 |
| Corona · United States | 33 °C | 6.1 °C | 438 mm | 189 |
Where Santa Ana ranks
| Ranking | Position | Value |
|---|---|---|
| Places with the best weather in North America in June | 2ndof 50 | 95/100 |
| Places with the best weather in North America year-round | 2ndof 50 | 90/100 |
| Places with the best weather in North America in May | 4thof 50 | 96/100 |
| Places with the best weather in the world year-round | 11thof 50 | 90/100 |
| Places with the best weather in North America in October | 13thof 50 | 95/100 |
| Places with the best weather in North America in July | 16thof 50 | 90/100 |
Planning a trip? See the best time to visit Santa Ana.
QuestionsCommon questions about Santa Ana’s climate
When is the best time to visit Santa Ana?
That depends on what you want, so the honest answer is a comparison rather than a single month. June, July, October sit closest to 20 °C on average, August is the warmest month and August the driest. The month-by-month table above has the full picture.
How hot does Santa Ana get?
In August, the warmest month, daily highs average 27 °C. About 16 days a year pass 30 °C. The highest value in the 1991–2020 record is 45 °C.
How cold does it get in winter?
Nights average 8.4 °C in December, the coldest month. Freezing nights are not part of a normal year here.
Which month is wettest in Santa Ana?
February, averaging 89 mm over 6 days with rain. The driest month is August with 1 mm. The year as a whole averages 355 mm.
Are these figures a forecast?
No. They are 1991–2020 climate normals: the average of thirty years, which describes what a month is usually like in Santa Ana rather than what any particular week will bring. Individual years can differ substantially from the normal.
Data sources and method
- ERA5 / ERA5-Land reanalysis — Copernicus Climate Change Service (C3S), ECMWF. Copernicus Licence
- Open-Meteo — Open-Meteo.com. CC BY 4.0
- NOAA OISST v2.1 — NOAA Physical Sciences Laboratory. Public domain
- GeoNames — GeoNames.org. CC BY 4.0
- Normal period
- 1991–2020
- Dataset version
- era5-1991-2020-scores1.1
- Last processed
Measured values come from ERA5 reanalysis and are reproduced unchanged. Calculated by us: monthly rankings, daylight hours, beach and comfort scores. Full formulas are on the methodology page.
Contains modified Copernicus Climate Change Service information 2026. Neither the European Commission nor ECMWF is responsible for any use that may be made of the Copernicus information or data it contains.