December is one of the cooler months of the year in Rivière-du-Loup, with average highs near -5.6°C and lows around -12.6°C (mean -9.1°C). It is about average for rainfall, averaging 67 mm of rainfall and 93% relative humidity across the period.
December is one of the cooler months of the year in Rivière-du-Loup. Across 45 years of records, the warmest December in Rivière-du-Loup was 2015 — when the month averaged -3.8°C — while the coldest was 1989 at -17.5°C. Typical December days reach -5.6°C with nights near -12.6°C. The long-term trend is warming, about 1.1°C per decade.
December is about average for rainfall in Rivière-du-Loup, averaging 67 mm of rainfall. The wettest December on record was 2003 with 228 mm, while the driest was 1985 at 23 mm.
Relative humidity in Rivière-du-Loup during December averages 93%. The most humid December was 1983 at 98%, and the least humid was 2023 at 85%.
December receives about 0.9 kWh/m²/day of solar energy in Rivière-du-Loup. The sunniest December was 1989 at 1.2 kWh/m²/day, and the cloudiest was 2015 at 0.7.
Average wind speed in Rivière-du-Loup during December is 2.2 m/s. The windiest Decembers were 2005, 2008 and 2025 at 2.8 m/s, while the calmest was 2001 at 1.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -11.7°C | -9.5°C | -9.0°C | -8.3°C | -6.1°C | +5.6°C |
| Avg High | -7.7°C | -5.7°C | -5.5°C | -5.1°C | -3.0°C | +4.7°C |
| Avg Low | -15.6°C | -13.2°C | -12.4°C | -11.5°C | -9.3°C | +6.3°C |
| Avg Rain | 55 mm | 46 mm | 91 mm | 81 mm | 57 mm | +2 mm |
December temperatures in Rivière-du-Loup have risen by about 4.4°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -34.5°C (1993) to a record high of 10.2°C (2023).
Rainfall in December is about average for rainfall, averaging 67 mm, with a wettest year of 228 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.8°C per decade while lows rose 1.3°C per decade, narrowing the gap between day and night.
A quieter season to visit Rivière-du-Loup
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Rivière-du-Loup. That said, December — with days averaging -5.6°C and nights around -12.6°C (mean -9.1°C) and moderate rainfall (67 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 | -5.9°C | -9.1°C | -12.3°C | 5.5°C | -19.8°C | 50 mm | 88% | 2.8 m/s | — |
| 2024 | -3.2°C | -5.9°C | -8.6°C | 4.6°C | -17.0°C | 63 mm | 88% | 2.4 m/s | 1 |
| 2023 | -1.0°C | -4.0°C | -7.1°C | 10.2°C | -13.5°C | 48 mm | 85% | 2.3 m/s | 1 |
| 2022 | -2.9°C | -5.8°C | -8.7°C | 2.3°C | -16.8°C | 75 mm | 93% | 2.5 m/s | 0.9 |
| 2021 | -3.6°C | -7.1°C | -10.7°C | 4.7°C | -18.0°C | 47 mm | 85% | 2.4 m/s | 1 |
| 2020 | -1.6°C | -4.9°C | -8.2°C | 9.9°C | -21.2°C | 57 mm | 89% | 2.4 m/s | 0.9 |
| 2019 | -4.6°C | -8.3°C | -11.9°C | 5.2°C | -17.6°C | 51 mm | 92% | 2.3 m/s | 1.1 |
| 2018 | -6.5°C | -10.3°C | -14.1°C | 2.9°C | -21.9°C | 69 mm | 95% | 2 m/s | 1 |
| 2017 | -9.1°C | -12.1°C | -15.1°C | 1.6°C | -23.7°C | 76 mm | 95% | 2.5 m/s | 1 |
| 2016 | -7.1°C | -11.0°C | -14.8°C | 0.2°C | -25.8°C | 78 mm | 98% | 2 m/s | 0.9 |
| 2015 🔥 | -1.2°C | -3.8°C | -6.4°C | 4.4°C | -17.3°C | 102 mm | 92% | 2.2 m/s | 0.7 |
| 2014 | -3.6°C | -6.6°C | -9.6°C | 2.6°C | -19.8°C | 92 mm | 90% | 2.4 m/s | 0.9 |
| 2013 | -8.9°C | -11.9°C | -15.0°C | 1.0°C | -24.0°C | 59 mm | 95% | 2.2 m/s | 0.9 |
| 2012 | -3.9°C | -6.9°C | -10.0°C | 3.9°C | -17.8°C | 93 mm | 93% | 2.6 m/s | 0.9 |
| 2011 | -3.1°C | -6.4°C | -9.7°C | 3.3°C | -20.4°C | 68 mm | 90% | 2.5 m/s | 0.9 |
| 2010 | -3.0°C | -5.7°C | -8.3°C | 5.4°C | -15.4°C | 121 mm | 94% | 2.6 m/s | 0.8 |
| 2009 | -5.1°C | -7.8°C | -10.5°C | 1.0°C | -18.5°C | 109 mm | 96% | 2.7 m/s | 0.9 |
| 2008 | -5.6°C | -9.5°C | -13.3°C | 2.2°C | -21.3°C | 96 mm | 93% | 2.8 m/s | 0.9 |
| 2007 | -6.3°C | -9.7°C | -13.1°C | 0.5°C | -19.3°C | 70 mm | 96% | 2.7 m/s | 1 |
| 2006 | -3.9°C | -7.4°C | -11.0°C | 1.4°C | -22.0°C | 58 mm | 93% | 1.8 m/s | 0.9 |
| 2005 | -4.8°C | -7.6°C | -10.4°C | 3.3°C | -19.5°C | 84 mm | 91% | 2.8 m/s | 1 |
| 2004 | -7.8°C | -12.4°C | -16.9°C | 1.2°C | -23.8°C | 116 mm | 97% | 2.2 m/s | 1 |
| 2003 🌧️ | -4.7°C | -8.3°C | -11.9°C | 2.9°C | -20.9°C | 228 mm | 94% | 2.1 m/s | 0.9 |
| 2002 | -6.3°C | -10.1°C | -13.9°C | 0.4°C | -25.7°C | 38 mm | 98% | 2 m/s | 1 |
| 2001 | -2.2°C | -5.0°C | -7.7°C | 5.9°C | -13.3°C | 36 mm | 87% | 1.7 m/s | 1 |
| 2000 | -8.3°C | -11.9°C | -15.5°C | 5.5°C | -26.7°C | 72 mm | 95% | 2.3 m/s | 1 |
| 1999 | -5.4°C | -8.8°C | -12.1°C | 3.7°C | -27.8°C | 69 mm | 95% | 1.9 m/s | 0.9 |
| 1998 | -4.6°C | -8.9°C | -13.1°C | 2.0°C | -28.4°C | 71 mm | 93% | 2.1 m/s | 1 |
| 1997 | -6.5°C | -10.6°C | -14.7°C | 1.0°C | -25.3°C | 32 mm | 93% | 1.9 m/s | 0.9 |
| 1996 | -2.4°C | -5.7°C | -9.1°C | 4.8°C | -27.6°C | 61 mm | 92% | 1.9 m/s | 0.9 |
| 1995 | -8.1°C | -11.7°C | -15.3°C | 0.2°C | -22.3°C | 31 mm | 94% | 1.9 m/s | 1.1 |
| 1994 | -5.0°C | -8.7°C | -12.5°C | 3.5°C | -22.1°C | 35 mm | 94% | 1.8 m/s | 0.8 |
| 1993 | -6.2°C | -10.0°C | -13.7°C | 2.4°C | -34.5°C | 48 mm | 95% | 1.9 m/s | 0.9 |
| 1992 | -5.1°C | -8.6°C | -12.1°C | 2.9°C | -25.1°C | 26 mm | 91% | 1.9 m/s | 0.9 |
| 1991 | -7.9°C | -11.7°C | -15.5°C | 4.6°C | -24.7°C | 31 mm | 88% | 2 m/s | 1 |
| 1990 | -5.8°C | -10.1°C | -14.4°C | 1.1°C | -26.2°C | 58 mm | 94% | 2.1 m/s | 0.9 |
| 1989 ❄️ | -13.5°C | -17.5°C | -21.5°C | -0.7°C | -30.3°C | 26 mm | 95% | 2.3 m/s | 1.2 |
| 1988 | -7.8°C | -11.8°C | -15.8°C | 1.2°C | -25.5°C | 35 mm | 91% | 2.1 m/s | 0.9 |
| 1987 | -6.8°C | -10.2°C | -13.5°C | 1.1°C | -25.5°C | 29 mm | 93% | 1.8 m/s | 0.9 |
| 1986 | -6.7°C | -11.3°C | -15.8°C | 0.0°C | -27.9°C | 40 mm | 96% | 1.9 m/s | 0.9 |
| 1985 | -8.7°C | -12.4°C | -16.2°C | 2.1°C | -27.3°C | 23 mm | 90% | 2 m/s | 1 |
| 1984 | -5.9°C | -10.5°C | -15.1°C | 2.6°C | -32.0°C | 68 mm | 93% | 1.9 m/s | 0.8 |
| 1983 | -9.2°C | -13.7°C | -18.1°C | 0.2°C | -30.2°C | 142 mm | 98% | 2.2 m/s | — |
| 1982 | -5.4°C | -9.5°C | -13.5°C | 7.2°C | -25.8°C | 84 mm | 91% | 2 m/s | — |
| 1981 | -4.9°C | -8.0°C | -11.2°C | 0.8°C | -21.6°C | 50 mm | 97% | 2 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around -5.6°C with lows near -12.6°C (mean -9.1°C), based on 45 years of NASA POWER data.
December averages 67 mm of rainfall in Rivière-du-Loup, about average for rainfall. The wettest on record was 228 mm in 2003.
The hottest December reached 10.2°C in 2023. The coldest dipped to -34.5°C in 1993.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 4.4°C. Daytime highs moved from -6.8°C to -3.3°C and overnight lows from -14.8°C to -9.5°C over the same span.
December is one of the cooler months of the year in Rivière-du-Loup and about average for rainfall, so plan for around -5.6°C daytime highs and -12.6°C at night.
Not quite — December is the 3rd coolest month in Rivière-du-Loup, averaging -9.1°C.
For December in Rivière-du-Loup, pack warm layers and a jacket for chilly mornings, with typical highs of -5.6°C and lows of -12.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 93% — quite humid.
Average wind speed in December is 2.2 m/s. The windiest December on record averaged 2.8 m/s (2005).
The wettest December on record was 2003 with 228 mm. On average, December sees 67 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 Rivière-du-Loup 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.
