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Weather extremes

How extreme does Chiayi City's weather get?

The hottest, coldest, wettest and snowiest days Chiayi City 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 Tainan station 58 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 Chiayi City has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
100°F Aug 19, 1994

That is about 11°F hotter than a normal August afternoon in Chiayi City (typical high near 89°F).

The three most extreme on record

1 100°F Aug 19, 1994
2 99°F Jun 16, 1993
3 98°F Jun 9, 1991
❄️ Coldest night
42°F Jan 25, 2016

About 16°F colder than a normal January night in Chiayi City (typical low near 58°F).

The three most extreme on record

1 42°F Jan 25, 2016
2 43°F Jan 24, 2016
3 43°F Dec 22, 1999
🌧️ Most rain in one day
15.39 in Aug 23, 2018

More rain in a single day than Chiayi City usually gets in the whole month of August (typical August total about 14.0 in).

The three most extreme on record

1 15.39 in Aug 23, 2018
2 11.81 in Jul 31, 2017
3 11.57 in Jul 20, 2005

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 100°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Chiayi City's record heat sits well above even a hot day for the season — August's 100°F is about 11°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, Chiayi City's warmest days reach the low 90s°F and its coldest nights drop to the high 50s°F. But across the record it has gone as high as 100°F and as low as 42°F. A single day has delivered over 15 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 29 years of daily observations at Tainan, a weather station, about 58 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →