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Weather extremes

How extreme does Coronado's weather get?

The hottest, coldest, wettest and snowiest days Coronado 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 N Is Nas station 3 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 Coronado has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
108°F Sep 4, 1988

That is about 31°F hotter than a normal September afternoon in Coronado (typical high near 77°F).

The three most extreme on record

1 108°F Sep 4, 1988
2 107°F Oct 3, 1987
3 107°F Oct 4, 1987
❄️ Coldest night
-80°F Feb 20, 2024

About 130°F colder than a normal February night in Coronado (typical low near 51°F).

The three most extreme on record

1 -80°F Feb 20, 2024recent
2 -80°F Mar 1, 2024
3 -80°F Mar 9, 2024
🌧️ Most rain in one day
3.51 in Jan 22, 2024

More rain in a single day than Coronado usually gets in the whole month of January (typical January total about 1.7 in).

The three most extreme on record

1 3.51 in Jan 22, 2024recent
2 2.99 in Oct 27, 2004
3 2.77 in Jan 31, 1979

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.

-90°-70°-50°-30°-10°10°30°50°70°90°110°130° all-time high 108°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Coronado's record heat sits well above even a hot day for the season — September's 108°F is about 31°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, Coronado's warmest days reach the high 70s°F and its coldest nights drop to the high 40s°F. But across the record it has gone as high as 108°F and as low as −80°F. A single day has delivered over 4 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 Imperial Beach Ream Fld Nas (NOAA GHCN station USW00093115), about 14 km from the city centre.

How we build these numbers →