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Weather extremes

How extreme does Saint-Brieuc's weather get?

The hottest, coldest, wettest and snowiest days Saint-Brieuc 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 Saint Brieuc Armor 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 Saint-Brieuc has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day
104°F Jul 18, 2022

That is about 33°F hotter than a normal July afternoon in Saint-Brieuc (typical high near 71°F).

The three most extreme on record

1 104°F Jul 18, 2022recent
2 101°F Aug 5, 2003
3 100°F Jul 19, 2022
❄️ Coldest night
9°F Feb 20, 1996

About 29°F colder than a normal February night in Saint-Brieuc (typical low near 38°F).

The three most extreme on record

1 9°F Feb 20, 1996
2 12°F Jan 2, 1997
3 15°F Feb 7, 1991
🌧️ Most rain in one day
2.19 in Oct 4, 2020

About 69% of a typical October's rain in a single day (Saint-Brieuc averages roughly 3.2 in across the month).

The three most extreme on record

1 2.19 in Oct 4, 2020
2 2.13 in Oct 2, 2020
3 2.02 in Jul 8, 2004

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

Saint-Brieuc's record heat sits well above even a hot day for the season — July's 104°F is about 33°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-Brieuc'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 104°F and as low as 9°F. A single day has delivered over 2 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 Saint-cast-le-g, a weather station, about 41 km from the city centre. The underlying daily records come from NOAA's global station network.

How we build these numbers →