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Weather extremes

How extreme does Nanjing's weather get?

The hottest, coldest, wettest and snowiest days Nanjing 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 Nanjing station 18 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 Nanjing has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
104°F Aug 2, 2003

That is about 15°F hotter than a normal August afternoon in Nanjing (typical high near 89°F).

The three most extreme on record

1 104°F Aug 2, 2003
2 104°F Aug 12, 2022
3 104°F Aug 6, 2024
❄️ Coldest night
8°F Jan 31, 1977

About 23°F colder than a normal January night in Nanjing (typical low near 31°F).

The three most extreme on record

1 8°F Jan 31, 1977
2 8°F Dec 29, 1991
3 9°F Dec 30, 1991
🌧️ Most rain in one day
9.27 in Jun 10, 2017

More rain in a single day than Nanjing usually gets in the whole month of June (typical June total about 7.2 in).

The three most extreme on record

1 9.27 in Jun 10, 2017
2 8.16 in Jul 5, 2003
3 7.30 in Jul 27, 2021

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 104°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Nanjing's record heat sits well above even a hot day for the season — August's 104°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, Nanjing's warmest days reach the low 90s°F and its coldest nights drop to the low 30s°F. But across the record it has gone as high as 104°F and as low as 8°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 Nanjing, a weather station, about 18 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →