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Weather extremes

How extreme does Haikou's weather get?

The hottest, coldest, wettest and snowiest days Haikou 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 Haikou station 11 km away. Updated through June 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 Haikou has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
106°F Apr 27, 2024

That is about 20°F hotter than a normal April afternoon in Haikou (typical high near 86°F).

The three most extreme on record

1 106°F Apr 27, 2024recent
2 106°F Apr 28, 2024
3 106°F Apr 30, 2024
❄️ Coldest night
41°F Jan 2, 1974

About 19°F colder than a normal January night in Haikou (typical low near 60°F).

The three most extreme on record

1 41°F Jan 2, 1974
2 42°F Jan 1, 1974
3 42°F Jan 3, 1974
🌧️ Most rain in one day
15.40 in Jul 18, 2014

More rain in a single day than Haikou usually gets in the whole month of July (typical July total about 9.5 in).

The three most extreme on record

1 15.40 in Jul 18, 2014
2 13.04 in Oct 5, 2011
3 12.91 in Sep 20, 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.

30°50°70°90°110°130° all-time high 106°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Haikou's record heat sits well above even a hot day for the season — April's 106°F is about 20°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, Haikou's warmest days reach the low 90s°F and its coldest nights drop to the low 60s°F. But across the record it has gone as high as 106°F and as low as 41°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 23 years of daily observations at Haikou, a weather station, about 11 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →