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Weather extremes

How extreme does Dunkerque's weather get?

The hottest, coldest, wettest and snowiest days Dunkerque 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 Dunkerque station 4 km away. Updated through January 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 Dunkerque has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
106°F Jul 25, 2019

That is about 36°F hotter than a normal July afternoon in Dunkerque (typical high near 71°F).

The three most extreme on record

1 106°F Jul 25, 2019
2 103°F Jul 19, 2022
3 100°F Jul 31, 2020
❄️ Coldest night
11°F Feb 7, 1991

About 27°F colder than a normal February night in Dunkerque (typical low near 38°F).

The three most extreme on record

1 11°F Feb 7, 1991
2 11°F Jan 2, 1997
3 14°F Feb 6, 1991
🌧️ Most rain in one day
5.83 in Sep 14, 1993

More rain in a single day than Dunkerque usually gets in the whole month of September (typical September total about 2.5 in).

The three most extreme on record

1 5.83 in Sep 14, 1993
2 4.74 in Aug 10, 1994
3 3.90 in Aug 11, 1991

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 106°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Dunkerque's record heat sits well above even a hot day for the season — July's 106°F is about 36°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, Dunkerque's warmest days reach the low 70s°F and its coldest nights drop to the high 30s°F. But across the record it has gone as high as 106°F and as low as 11°F. A single day has delivered over 6 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 30 years of daily observations at Koksijde, a weather station, about 20 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →