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Weather extremes

How extreme does El Monte's weather get?

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

Based on 50+ years of daily weather observations (1971–present), from the San Gabriel Fire Dept station 7 km away. Updated through May 2026 — 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 El Monte has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
117°F Jan 9, 2005

That is about 48°F hotter than a normal January afternoon in El Monte (typical high near 69°F).

The three most extreme on record

1 117°F Jan 9, 2005
2 112°F Aug 7, 1983
3 112°F Sep 4, 1988
❄️ Coldest night
10°F Dec 6, 1998

About 35°F colder than a normal December night in El Monte (typical low near 45°F).

The three most extreme on record

1 10°F Dec 6, 1998
2 24°F Dec 22, 1990
3 25°F Feb 6, 1989
🌧️ Most rain in one day
5.08 in Jan 10, 2023

More rain in a single day than El Monte usually gets in the whole month of January (typical January total about 3.6 in).

The three most extreme on record

1 5.08 in Jan 10, 2023recent
2 4.95 in Mar 2, 1983
3 4.75 in Jan 10, 1995

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.

-10°10°30°50°70°90°110°130° all-time high 117°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

El Monte's record heat sits well above even a hot day for the season — January's 117°F is about 48°F beyond a normal hot afternoon. 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, El Monte's warmest days reach the high 80s°F and its coldest nights drop to the mid-40s°F. But across the record it has gone as high as 117°F and as low as 10°F. A single day has delivered over 5 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 — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Santa Ana Fire Stn (NOAA GHCN station USC00047888), about 39 km from the city centre.

How we build these numbers →