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Weather extremes

How extreme does San Juan Bautista's weather get?

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

Based on 34 years of daily weather observations (1991–present), from the San Juan Bautista station. 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 San Juan Bautista has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
109°F Jan 25, 2022

That is about 16°F hotter than a normal January afternoon in San Juan Bautista (typical high near 92°F).

The three most extreme on record

1 109°F Jan 25, 2022recent
2 107°F Feb 28, 2022
3 106°F Jan 14, 2022
❄️ Coldest night
30°F Jul 14, 1993

About 23°F colder than a normal July night in San Juan Bautista (typical low near 52°F).

The three most extreme on record

1 30°F Jul 14, 1993
2 30°F Jul 29, 2021
3 30°F May 20, 1995
🌧️ Most rain in one day
9.06 in Dec 13, 2012

More rain in a single day than San Juan Bautista usually gets in the whole month of December (typical December total about 5.4 in).

The three most extreme on record

1 9.06 in Dec 13, 2012
2 7.64 in Dec 1, 2002
3 7.22 in Jun 5, 2000

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°30°50°70°90°110°130° all-time high 109°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

San Juan Bautista's record heat sits well above even a hot day for the season — January's 109°F is about 16°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, San Juan Bautista's warmest days reach the low 90s°F and its coldest nights drop to the low 50s°F. But across the record it has gone as high as 109°F and as low as 30°F. A single day has delivered over 9 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 22 years of daily observations at San Juan Bautista, a weather station, inside the city. The underlying daily records come from NOAA's global station network.

How we build these numbers →