The hottest, coldest, wettest and snowiest days Sept-Îles has
recorded — the outer limits of what its weather can do, and how far
they sit beyond a normal day.
Based on 24 years of daily weather observations (2001–present), from the Pointe Noire Cs Que 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 Sept-Îles
has recorded — each shown against what a normal day that time of year
looks like.
🔥Hottest day
91°FAug 12, 2025
The three most extreme on record
191°FAug 12, 2025recent
290°FJul 5, 2013
390°FJul 6, 2013
❄️Coldest night
-24°FJan 2, 2014
The three most extreme on record
1-24°FJan 2, 2014
2-21°FJan 3, 2014
3-20°FJan 30, 2002
🌧️Most rain in one day
4.13 inSep 1, 2005
The three most extreme on record
14.13 inSep 1, 2005
23.80 inDec 8, 2022
32.61 inJul 28, 2003
In plain terms
In a normal year, Sept-Îles's warmest days reach the low 50s°F and its coldest nights drop to the mid-10s°F. But across the record it has gone as high as 91°F and as low as −24°F. A single day has delivered over 4 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 24 years of daily observations at Baie-comeau, a weather station, about 164 km from the city centre. The underlying daily records come from NOAA's global station network.