December is one of the cooler months of the year in Sept-Îles, with average highs near -3.9°C and lows around -8.7°C (mean -6.3°C). It is about average for rainfall, averaging 90 mm of rainfall and 90% relative humidity across the period.
December is one of the cooler months of the year in Sept-Îles. Across 45 years of records, the warmest December in Sept-Îles was 2010 — when the month averaged -1.1°C — while the coldest was 2013 at -10.5°C. Typical December days reach -3.9°C with nights near -8.7°C. The long-term trend is warming, about 0.8°C per decade.
December is about average for rainfall in Sept-Îles, averaging 90 mm of rainfall. The wettest December on record was 2010 with 206 mm, while the driest was 2013 at 37 mm.
Relative humidity in Sept-Îles during December averages 90%. The most humid December was 1989 at 94%, and the least humid was 2024 at 83%.
December receives about 0.8 kWh/m²/day of solar energy in Sept-Îles. The sunniest December was 2023 at 1 kWh/m²/day, and the cloudiest were 1999, 2010 and 2020, among others at 0.7.
Average wind speed in Sept-Îles during December is 4.9 m/s. The windiest December was 2010 at 6.1 m/s, while the calmest was 1993 at 4.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -8.1°C | -6.7°C | -6.2°C | -5.6°C | -4.1°C | +4°C |
| Avg High | -5.5°C | -4.1°C | -3.8°C | -3.4°C | -1.9°C | +3.6°C |
| Avg Low | -10.8°C | -9.2°C | -8.5°C | -7.8°C | -6.4°C | +4.4°C |
| Avg Rain | 91 mm | 93 mm | 91 mm | 83 mm | 96 mm | +4 mm |
December temperatures in Sept-Îles have risen by about 3.2°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -24.5°C (1989) to a record high of 8.2°C (2023).
Rainfall in December is about average for rainfall, averaging 90 mm, with a wettest year of 206 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.7°C per decade while lows rose 0.9°C per decade, narrowing the gap between day and night.
A quieter season to visit Sept-Îles
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Sept-Îles. That said, December — with days averaging -3.9°C and nights around -8.7°C (mean -6.3°C) and higher rainfall (90 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | -4.3°C | -7.1°C | -9.9°C | 5.4°C | -15.1°C | 77 mm | 89% | 5.2 m/s | — |
| 2024 | -1.4°C | -3.3°C | -5.2°C | 6.7°C | -11.2°C | 76 mm | 83% | 4.9 m/s | 0.8 |
| 2023 | -1.1°C | -3.2°C | -5.3°C | 8.2°C | -10.4°C | 67 mm | 83% | 4.7 m/s | 1 |
| 2022 | -1.5°C | -3.6°C | -5.7°C | 2.6°C | -13.4°C | 116 mm | 90% | 5.1 m/s | 0.8 |
| 2021 | -2.1°C | -4.6°C | -7.1°C | 2.9°C | -14.7°C | 83 mm | 87% | 5.1 m/s | 0.8 |
| 2020 | -1.0°C | -3.0°C | -5.0°C | 5.8°C | -13.0°C | 154 mm | 87% | 4.3 m/s | 0.7 |
| 2019 | -3.5°C | -5.9°C | -8.3°C | 3.3°C | -15.5°C | 55 mm | 89% | 4.9 m/s | 0.9 |
| 2018 | -4.6°C | -6.9°C | -9.1°C | 3.1°C | -16.2°C | 73 mm | 90% | 4.3 m/s | 0.9 |
| 2017 | -5.0°C | -7.3°C | -9.5°C | 1.7°C | -15.8°C | 91 mm | 92% | 5.1 m/s | 0.8 |
| 2016 | -3.3°C | -5.9°C | -8.5°C | 1.6°C | -17.3°C | 83 mm | 88% | 5 m/s | 0.9 |
| 2015 | -2.0°C | -3.8°C | -5.7°C | 3.2°C | -15.7°C | 48 mm | 87% | 4.5 m/s | 0.8 |
| 2014 | -2.5°C | -4.8°C | -7.2°C | 2.6°C | -19.3°C | 75 mm | 86% | 4.8 m/s | 0.8 |
| 2013 ❄️ | -8.4°C | -10.5°C | -12.7°C | 1.2°C | -22.9°C | 37 mm | 92% | 4.8 m/s | 0.8 |
| 2012 | -2.3°C | -4.3°C | -6.4°C | 2.2°C | -12.6°C | 80 mm | 90% | 5.1 m/s | 0.8 |
| 2011 | -2.7°C | -5.5°C | -8.2°C | 2.6°C | -17.0°C | 81 mm | 89% | 4.7 m/s | 0.8 |
| 2010 🔥 🌧️ | 0.5°C | -1.1°C | -2.7°C | 6.6°C | -8.8°C | 206 mm | 87% | 6.1 m/s | 0.7 |
| 2009 | -2.6°C | -4.6°C | -6.5°C | 2.2°C | -15.0°C | 76 mm | 88% | 4.9 m/s | 0.9 |
| 2008 | -4.2°C | -7.3°C | -10.3°C | 2.6°C | -19.3°C | 119 mm | 92% | 5.1 m/s | 0.8 |
| 2007 | -5.6°C | -8.1°C | -10.6°C | 1.4°C | -16.3°C | 73 mm | 92% | 5.1 m/s | 0.9 |
| 2006 | -2.8°C | -5.0°C | -7.3°C | 2.4°C | -15.5°C | 60 mm | 89% | 4.8 m/s | 0.9 |
| 2005 | -4.6°C | -6.8°C | -9.0°C | 4.5°C | -15.8°C | 88 mm | 90% | 5.3 m/s | 0.9 |
| 2004 | -5.1°C | -8.1°C | -11.0°C | 2.8°C | -19.0°C | 119 mm | 93% | 5 m/s | 0.9 |
| 2003 | -3.1°C | -5.0°C | -6.9°C | 1.6°C | -13.1°C | 140 mm | 88% | 4.7 m/s | 0.8 |
| 2002 | -4.0°C | -6.2°C | -8.4°C | 0.7°C | -18.8°C | 74 mm | 91% | 4.7 m/s | 0.9 |
| 2001 | -1.9°C | -3.8°C | -5.7°C | 2.7°C | -10.3°C | 50 mm | 86% | 4.8 m/s | 0.9 |
| 2000 | -4.5°C | -6.8°C | -9.0°C | 4.0°C | -17.6°C | 117 mm | 91% | 5.4 m/s | 0.8 |
| 1999 | -3.5°C | -5.5°C | -7.5°C | 1.4°C | -19.2°C | 107 mm | 90% | 4.8 m/s | 0.7 |
| 1998 | -3.4°C | -6.5°C | -9.5°C | 1.6°C | -19.8°C | 90 mm | 90% | 5.1 m/s | 0.9 |
| 1997 | -3.6°C | -5.8°C | -7.9°C | 3.1°C | -20.3°C | 52 mm | 88% | 4.5 m/s | 0.8 |
| 1996 | -2.3°C | -4.5°C | -6.7°C | 2.8°C | -22.0°C | 183 mm | 91% | 5 m/s | 0.7 |
| 1995 | -4.7°C | -7.0°C | -9.3°C | 1.4°C | -17.8°C | 85 mm | 93% | 5.1 m/s | 0.9 |
| 1994 | -3.8°C | -6.3°C | -8.7°C | 0.7°C | -16.2°C | 81 mm | 90% | 4.6 m/s | 0.8 |
| 1993 | -4.3°C | -6.7°C | -9.1°C | 3.3°C | -23.9°C | 116 mm | 90% | 4.1 m/s | 0.8 |
| 1992 | -4.5°C | -7.4°C | -10.2°C | 1.9°C | -21.0°C | 45 mm | 91% | 4.2 m/s | 0.8 |
| 1991 | -6.8°C | -9.9°C | -12.9°C | 3.5°C | -20.9°C | 73 mm | 94% | 4.8 m/s | 0.9 |
| 1990 | -4.3°C | -7.3°C | -10.4°C | 1.1°C | -23.0°C | 99 mm | 92% | 5.1 m/s | 0.8 |
| 1989 | -8.0°C | -10.4°C | -12.8°C | -1.6°C | -24.5°C | 54 mm | 94% | 5.2 m/s | 0.9 |
| 1988 | -6.3°C | -8.7°C | -11.0°C | 1.4°C | -20.6°C | 80 mm | 93% | 4.8 m/s | 0.8 |
| 1987 | -5.5°C | -7.4°C | -9.3°C | 2.4°C | -17.2°C | 75 mm | 90% | 4.6 m/s | 0.9 |
| 1986 | -5.3°C | -8.5°C | -11.7°C | 0.7°C | -22.0°C | 87 mm | 94% | 4.6 m/s | 0.7 |
| 1985 | -7.1°C | -9.8°C | -12.5°C | 1.2°C | -21.3°C | 77 mm | 93% | 4.6 m/s | 0.8 |
| 1984 | -5.0°C | -8.3°C | -11.6°C | 2.1°C | -23.9°C | 81 mm | 92% | 4.6 m/s | 0.7 |
| 1983 | -5.6°C | -8.4°C | -11.2°C | 1.8°C | -22.9°C | 149 mm | 93% | 5.4 m/s | — |
| 1982 | -4.8°C | -8.0°C | -11.2°C | 2.6°C | -20.4°C | 100 mm | 92% | 4.7 m/s | — |
| 1981 | -1.8°C | -3.7°C | -5.6°C | 4.2°C | -15.1°C | 118 mm | 88% | 4.4 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around -3.9°C with lows near -8.7°C (mean -6.3°C), based on 45 years of NASA POWER data.
December averages 90 mm of rainfall in Sept-Îles, about average for rainfall. The wettest on record was 206 mm in 2010.
The hottest December reached 8.2°C in 2023. The coldest dipped to -24.5°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 3.2°C. Daytime highs moved from -4.9°C to -2.1°C and overnight lows from -10.4°C to -6.6°C over the same span.
December is one of the cooler months of the year in Sept-Îles and about average for rainfall, so plan for around -3.9°C daytime highs and -8.7°C at night.
Not quite — December is the 3rd coolest month in Sept-Îles, averaging -6.3°C.
For December in Sept-Îles, pack warm layers and a jacket for chilly mornings, with typical highs of -3.9°C and lows of -8.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 90% — quite humid.
Average wind speed in December is 4.9 m/s. The windiest December on record averaged 6.1 m/s (2010).
The wettest December on record was 2010 with 206 mm. On average, December sees 90 mm.
All figures are derived from NASA POWER (Prediction Of Worldwide Energy Resources), based on MERRA-2 satellite reanalysis, covering 1981–2025.
Explore how the weather in Sept-Îles behaves each December, based on 45 years of NASA POWER climate data from 1981 to 2025. This page breaks down average temperatures, rainfall, humidity, wind and solar radiation for December specifically, along with year-by-year records and how the month has changed over the decades.
