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Weather extremes

How extreme does Santa Ana's weather get?

The hottest, coldest, wettest and snowiest days Santa Ana has recorded — the outer limits of what its weather can do, and how far they sit beyond a normal day.

Based on 30 years of daily weather observations (1995–present), from the Santa Ana/El Palmar station 4 km away. Updated through August 2025 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Santa Ana has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
115°F Jun 2, 2018

The three most extreme on record

1 115°F Jun 2, 2018
2 103°F Sep 6, 2013
3 103°F Nov 4, 2019
❄️ Coldest night
52°F Dec 17, 2010

About 15°F colder than a normal December night in Santa Ana (typical low near 67°F).

The three most extreme on record

1 52°F Dec 17, 2010
2 54°F Dec 15, 2010
3 54°F Feb 4, 2021
🌧️ Most rain in one day
6.11 in May 31, 2010

The three most extreme on record

1 6.11 in May 31, 2010
2 5.28 in Jun 2, 2025
3 4.46 in Jun 24, 2006

How hot and cold it gets, month by month

The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.

30°50°70°90°110°130° all-time high 115°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Santa Ana's record heat sits well above even a hot day for the season. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.

In plain terms

In a normal year, Santa Ana's warmest days reach the low 90s°F and its coldest nights drop to the high 60s°F. But across the record it has gone as high as 115°F and as low as 52°F. A single day has delivered over 6 inches of rain. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.
Methodology & sources

Temperature & precipitation — 1991–2020 normals computed from 25 years of daily observations at Ilopango Intl, a weather station, about 57 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →