December is one of the cooler months of the year in Rimouski, with average highs near -5.1°C and lows around -11°C (mean -8°C). It is about average for rainfall, averaging 79 mm of rainfall and 92% relative humidity across the period.
December is one of the cooler months of the year in Rimouski. Across 45 years of records, the warmest December in Rimouski was 2023 — when the month averaged -3.5°C — while the coldest was 1989 at -15.4°C. Typical December days reach -5.1°C with nights near -11°C. The long-term trend is warming, about 0.9°C per decade.
December is about average for rainfall in Rimouski, averaging 79 mm of rainfall. The wettest December on record was 2003 with 191 mm, while the driest was 1997 at 29 mm.
Relative humidity in Rimouski during December averages 92%. The most humid December was 1989 at 97%, and the least humid was 2023 at 83%.
December receives about 0.9 kWh/m²/day of solar energy in Rimouski. The sunniest Decembers were 2019, 2021 and 2024, among others at 1 kWh/m²/day, and the cloudiest were 1994, 2010 and 2015, among others at 0.7.
Average wind speed in Rimouski during December is 3.1 m/s. The windiest Decembers were 2005 and 2025 at 3.9 m/s, while the calmest were 1987 and 1994 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -10.3°C | -8.4°C | -7.7°C | -7.4°C | -5.5°C | +4.8°C |
| Avg High | -7.0°C | -5.2°C | -4.8°C | -4.6°C | -2.9°C | +4.1°C |
| Avg Low | -13.5°C | -11.6°C | -10.5°C | -10.1°C | -8.3°C | +5.2°C |
| Avg Rain | 68 mm | 58 mm | 92 mm | 100 mm | 76 mm | +7 mm |
December temperatures in Rimouski have risen by about 3.8°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -29.6°C (1993) to a record high of 10.4°C (2023).
Rainfall in December is about average for rainfall, averaging 79 mm, with a wettest year of 191 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.8°C per decade while lows rose 1.1°C per decade, narrowing the gap between day and night.
A quieter season to visit Rimouski
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Rimouski. That said, December — with days averaging -5.1°C and nights around -11°C (mean -8°C) and moderate rainfall (79 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 | -5.6°C | -8.3°C | -11.1°C | 6.2°C | -16.8°C | 86 mm | 90% | 3.9 m/s | — |
| 2024 | -2.9°C | -5.1°C | -7.4°C | 4.4°C | -15.2°C | 84 mm | 86% | 3.2 m/s | 1 |
| 2023 🔥 | -0.9°C | -3.5°C | -6.1°C | 10.4°C | -12.5°C | 49 mm | 83% | 3.2 m/s | 0.9 |
| 2022 | -2.6°C | -5.1°C | -7.6°C | 2.3°C | -15.0°C | 85 mm | 91% | 3.4 m/s | 0.8 |
| 2021 | -3.5°C | -6.7°C | -9.9°C | 4.6°C | -17.0°C | 72 mm | 88% | 3.3 m/s | 1 |
| 2020 | -1.7°C | -4.6°C | -7.5°C | 8.8°C | -20.0°C | 79 mm | 89% | 3.1 m/s | 0.8 |
| 2019 | -4.9°C | -8.1°C | -11.3°C | 4.9°C | -17.0°C | 74 mm | 93% | 3.1 m/s | 1 |
| 2018 | -6.4°C | -9.5°C | -12.6°C | 3.0°C | -19.0°C | 83 mm | 94% | 2.7 m/s | 1 |
| 2017 | -8.5°C | -11.3°C | -14.1°C | 1.3°C | -22.1°C | 99 mm | 95% | 3.3 m/s | 0.9 |
| 2016 | -5.9°C | -9.0°C | -12.2°C | 0.5°C | -21.6°C | 94 mm | 95% | 3 m/s | 0.9 |
| 2015 | -1.4°C | -3.6°C | -5.7°C | 3.3°C | -15.7°C | 107 mm | 91% | 3 m/s | 0.7 |
| 2014 | -3.4°C | -6.0°C | -8.6°C | 2.4°C | -19.1°C | 123 mm | 90% | 3.2 m/s | 0.8 |
| 2013 | -8.4°C | -11.1°C | -13.8°C | 1.3°C | -22.8°C | 96 mm | 94% | 3.3 m/s | 0.8 |
| 2012 | -3.3°C | -5.8°C | -8.3°C | 3.3°C | -16.3°C | 125 mm | 92% | 3.4 m/s | 0.9 |
| 2011 | -2.7°C | -5.5°C | -8.3°C | 3.5°C | -18.4°C | 63 mm | 88% | 3.4 m/s | 0.8 |
| 2010 | -1.5°C | -3.7°C | -5.8°C | 7.2°C | -12.4°C | 132 mm | 91% | 3.5 m/s | 0.7 |
| 2009 | -4.0°C | -6.3°C | -8.7°C | 1.5°C | -16.1°C | 98 mm | 93% | 3.6 m/s | 0.9 |
| 2008 | -4.8°C | -8.0°C | -11.2°C | 2.3°C | -18.8°C | 108 mm | 92% | 3.7 m/s | 0.8 |
| 2007 | -5.7°C | -8.5°C | -11.3°C | 1.2°C | -16.2°C | 77 mm | 93% | 3.7 m/s | 0.9 |
| 2006 | -3.8°C | -6.8°C | -9.8°C | 1.5°C | -19.3°C | 60 mm | 91% | 2.7 m/s | 0.9 |
| 2005 | -4.4°C | -6.7°C | -9.1°C | 3.6°C | -17.2°C | 96 mm | 91% | 3.9 m/s | 0.9 |
| 2004 | -6.8°C | -10.6°C | -14.4°C | 2.2°C | -21.1°C | 112 mm | 95% | 3.1 m/s | 1 |
| 2003 🌧️ | -4.1°C | -7.1°C | -10.2°C | 3.4°C | -17.5°C | 191 mm | 92% | 3 m/s | 0.8 |
| 2002 | -5.6°C | -8.5°C | -11.5°C | 0.5°C | -22.6°C | 51 mm | 96% | 3 m/s | 0.9 |
| 2001 | -2.1°C | -4.4°C | -6.6°C | 5.5°C | -11.1°C | 43 mm | 85% | 2.7 m/s | 0.9 |
| 2000 | -7.0°C | -9.8°C | -12.7°C | 6.1°C | -23.0°C | 86 mm | 94% | 3.4 m/s | 1 |
| 1999 | -4.7°C | -7.4°C | -10.0°C | 3.5°C | -22.8°C | 75 mm | 93% | 2.9 m/s | 0.8 |
| 1998 | -4.3°C | -8.1°C | -11.9°C | 1.8°C | -23.6°C | 72 mm | 92% | 3 m/s | 1 |
| 1997 | -5.3°C | -8.5°C | -11.7°C | 1.5°C | -21.9°C | 29 mm | 89% | 2.7 m/s | 0.9 |
| 1996 | -2.2°C | -5.0°C | -7.8°C | 5.5°C | -25.3°C | 75 mm | 92% | 2.8 m/s | 0.9 |
| 1995 | -6.9°C | -9.7°C | -12.6°C | 0.4°C | -19.3°C | 36 mm | 92% | 2.8 m/s | 1 |
| 1994 | -4.9°C | -7.8°C | -10.8°C | 2.7°C | -20.8°C | 47 mm | 93% | 2.6 m/s | 0.7 |
| 1993 | -5.8°C | -8.8°C | -11.9°C | 2.4°C | -29.6°C | 73 mm | 94% | 2.7 m/s | 0.8 |
| 1992 | -5.0°C | -8.1°C | -11.2°C | 2.2°C | -23.8°C | 38 mm | 93% | 2.8 m/s | 0.9 |
| 1991 | -7.6°C | -11.2°C | -14.7°C | 5.0°C | -23.4°C | 51 mm | 91% | 2.9 m/s | 1 |
| 1990 | -5.4°C | -9.2°C | -13.1°C | 0.9°C | -25.6°C | 87 mm | 95% | 3.1 m/s | 0.9 |
| 1989 ❄️ | -12.2°C | -15.4°C | -18.6°C | -1.8°C | -27.3°C | 45 mm | 97% | 3.4 m/s | 0.9 |
| 1988 | -7.4°C | -10.7°C | -13.9°C | 0.9°C | -24.9°C | 59 mm | 93% | 2.8 m/s | 0.9 |
| 1987 | -6.7°C | -9.5°C | -12.4°C | 1.3°C | -22.8°C | 43 mm | 93% | 2.6 m/s | 0.9 |
| 1986 | -6.0°C | -9.6°C | -13.3°C | 0.3°C | -24.5°C | 52 mm | 95% | 3.1 m/s | 0.9 |
| 1985 | -8.5°C | -11.7°C | -14.8°C | 2.0°C | -24.6°C | 38 mm | 93% | 2.9 m/s | 1 |
| 1984 | -5.6°C | -9.4°C | -13.1°C | 3.3°C | -27.3°C | 64 mm | 92% | 2.8 m/s | 0.7 |
| 1983 | -7.6°C | -11.1°C | -14.5°C | 0.6°C | -23.6°C | 150 mm | 96% | 3.5 m/s | — |
| 1982 | -5.5°C | -9.0°C | -12.5°C | 5.1°C | -24.3°C | 89 mm | 91% | 2.8 m/s | — |
| 1981 | -3.9°C | -6.3°C | -8.8°C | 1.3°C | -17.6°C | 76 mm | 95% | 2.8 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around -5.1°C with lows near -11°C (mean -8°C), based on 45 years of NASA POWER data.
December averages 79 mm of rainfall in Rimouski, about average for rainfall. The wettest on record was 191 mm in 2003.
The hottest December reached 10.4°C in 2023. The coldest dipped to -29.6°C in 1993.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 3.8°C. Daytime highs moved from -6.2°C to -3.1°C and overnight lows from -12.7°C to -8.4°C over the same span.
December is one of the cooler months of the year in Rimouski and about average for rainfall, so plan for around -5.1°C daytime highs and -11°C at night.
Not quite — December is the 3rd coolest month in Rimouski, averaging -8°C.
For December in Rimouski, pack warm layers and a jacket for chilly mornings, with typical highs of -5.1°C and lows of -11°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 92% — quite humid.
Average wind speed in December is 3.1 m/s. The windiest December on record averaged 3.9 m/s (2005).
The wettest December on record was 2003 with 191 mm. On average, December sees 79 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 Rimouski 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.
