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Weather extremes

How extreme does Saint-Denis's weather get?

The hottest, coldest, wettest and snowiest days Saint-Denis 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 (1973–present), from the St Denis Gillot station 6 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 Saint-Denis has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
108°F Jun 25, 1982

That is about 29°F hotter than a normal June afternoon in Saint-Denis (typical high near 79°F).

The three most extreme on record

1 108°F Jun 25, 1982
2 106°F Feb 2, 1975
3 100°F Apr 25, 1979
❄️ Coldest night
44°F Jul 23, 1990

About 20°F colder than a normal July night in Saint-Denis (typical low near 64°F).

The three most extreme on record

1 44°F Jul 23, 1990
2 46°F Jul 1, 1974
3 46°F May 21, 1980
🌧️ Most rain in one day
15.98 in Jan 28, 1979

More rain in a single day than Saint-Denis usually gets in the whole month of January (typical January total about 11.7 in).

The three most extreme on record

1 15.98 in Jan 28, 1979
2 15.20 in Aug 10, 1996
3 15.04 in Jun 12, 1997

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 108°F JanFebMarAprMayJunJulAugSepOctNovDec
normal range of daily temperatureshottest ever recordedcoldest ever recorded

Saint-Denis's record heat sits well above even a hot day for the season — June's 108°F is about 29°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, Saint-Denis's warmest days reach the high 80s°F and its coldest nights drop to the mid-60s°F. But across the record it has gone as high as 108°F and as low as 44°F. A single day has delivered over 16 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 26 years of daily observations at ST Denis Gillot, a weather station, about 6 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →