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Weather extremes

How extreme does Hangzhou's weather get?

The hottest, coldest, wettest and snowiest days Hangzhou 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 Hangzhou station 7 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 Hangzhou has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
107°F Aug 14, 2022

That is about 15°F hotter than a normal August afternoon in Hangzhou (typical high near 92°F).

The three most extreme on record

1 107°F Aug 14, 2022recent
2 107°F Aug 15, 2022
3 107°F Aug 3, 2024
❄️ Coldest night
17°F Jan 5, 1977

About 19°F colder than a normal January night in Hangzhou (typical low near 36°F).

The three most extreme on record

1 17°F Jan 5, 1977
2 17°F Dec 29, 1991
3 17°F Jan 25, 2016
🌧️ Most rain in one day
8.91 in Oct 7, 2013

More rain in a single day than Hangzhou usually gets in the whole month of October (typical October total about 2.8 in).

The three most extreme on record

1 8.91 in Oct 7, 2013
2 7.53 in Oct 8, 2007
3 5.37 in Jun 30, 1996

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 107°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Hangzhou's record heat sits well above even a hot day for the season — August's 107°F is about 15°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, Hangzhou's warmest days reach the low 90s°F and its coldest nights drop to the mid-30s°F. But across the record it has gone as high as 107°F and as low as 17°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 23 years of daily observations at Hangzhou, a weather station, about 7 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →