December is one of the cooler months of the year in Grande Prairie, with average highs near -6.8°C and lows around -14.3°C (mean -10.5°C). It is one of the drier months, averaging 35 mm of rainfall and 94% relative humidity across the period.
December is one of the cooler months of the year in Grande Prairie. Across 45 years of records, the warmest December in Grande Prairie was 2023 — when the month averaged -3°C — while the coldest was 1983 at -18.4°C. Typical December days reach -6.8°C with nights near -14.3°C. The long-term December temperature trend is broadly flat.
December is one of the drier months in Grande Prairie, averaging 35 mm of rainfall. The wettest Decembers on record were 2013 and 2025 with 120 mm, while the driest was 1986 at 9 mm.
Relative humidity in Grande Prairie during December averages 94%. The most humid December was 1995 at 99%, and the least humid was 2011 at 83%.
December receives about 0.5 kWh/m²/day of solar energy in Grande Prairie. The sunniest Decembers were 2019, 2021 and 2023, among others at 0.6 kWh/m²/day, and the cloudiest were 2004 and 2013 at 0.4.
Average wind speed in Grande Prairie during December is 0.9 m/s. The windiest December was 2004 at 1.3 m/s, while the calmest was 2002 at 0.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -10.5°C | -11.0°C | -9.6°C | -10.8°C | -11.1°C | -0.6°C |
| Avg High | -6.8°C | -7.0°C | -6.0°C | -7.0°C | -7.5°C | -0.7°C |
| Avg Low | -14.2°C | -14.9°C | -13.2°C | -14.5°C | -14.7°C | -0.5°C |
| Avg Rain | 28 mm | 41 mm | 27 mm | 38 mm | 47 mm | +20 mm |
December temperatures in Grande Prairie have risen by about 1.5°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -46.2°C (1992) to a record high of 6.6°C (2005).
Rainfall in December is one of the drier months, averaging 35 mm, with a wettest year of 120 mm.
A quieter season to visit Grande Prairie
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Grande Prairie. That said, December — with days averaging -6.8°C and nights around -14.3°C (mean -10.5°C) and moderate rainfall (35 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 | -12.6°C | -16.6°C | -20.6°C | 2.2°C | -30.5°C | 120 mm | 97% | 1 m/s | — |
| 2024 | -4.5°C | -7.8°C | -11.0°C | 2.2°C | -25.5°C | 47 mm | 95% | 0.8 m/s | 0.5 |
| 2023 🔥 | 0.1°C | -3.0°C | -6.2°C | 4.0°C | -10.5°C | 11 mm | 90% | 0.8 m/s | 0.6 |
| 2022 | -12.5°C | -16.3°C | -20.0°C | -0.8°C | -34.7°C | 39 mm | 92% | 1 m/s | 0.5 |
| 2021 | -12.3°C | -16.4°C | -20.6°C | 2.5°C | -39.5°C | 40 mm | 91% | 0.9 m/s | 0.6 |
| 2020 | -3.1°C | -6.4°C | -9.7°C | 5.6°C | -20.8°C | 24 mm | 92% | 0.9 m/s | 0.5 |
| 2019 | -4.4°C | -8.1°C | -11.7°C | 1.2°C | -15.9°C | 21 mm | 96% | 0.9 m/s | 0.6 |
| 2018 | -3.7°C | -7.8°C | -11.8°C | 2.7°C | -20.6°C | 36 mm | 93% | 0.9 m/s | 0.6 |
| 2017 | -6.8°C | -10.3°C | -13.8°C | 3.2°C | -34.3°C | 11 mm | 91% | 1 m/s | 0.6 |
| 2016 | -10.0°C | -13.9°C | -17.7°C | 0.5°C | -30.7°C | 23 mm | 95% | 1.2 m/s | 0.6 |
| 2015 | -5.4°C | -8.3°C | -11.2°C | 2.3°C | -20.5°C | 24 mm | 94% | 0.8 m/s | 0.6 |
| 2014 | -4.6°C | -8.1°C | -11.6°C | 1.5°C | -25.8°C | 30 mm | 96% | 0.8 m/s | 0.5 |
| 2013 🌧️ | -9.4°C | -14.3°C | -19.2°C | 0.7°C | -34.7°C | 120 mm | 99% | 1.1 m/s | 0.4 |
| 2012 | -12.9°C | -16.8°C | -20.6°C | 0.3°C | -33.6°C | 42 mm | 99% | 0.9 m/s | 0.5 |
| 2011 | -1.3°C | -4.6°C | -7.8°C | 4.1°C | -15.9°C | 34 mm | 83% | 1.2 m/s | 0.5 |
| 2010 | -11.9°C | -15.8°C | -19.7°C | 0.0°C | -29.3°C | 42 mm | 97% | 0.8 m/s | 0.5 |
| 2009 | -11.6°C | -15.7°C | -19.7°C | 0.6°C | -39.9°C | 38 mm | 94% | 0.9 m/s | 0.5 |
| 2008 | -12.0°C | -16.2°C | -20.5°C | 2.7°C | -34.1°C | 47 mm | 93% | 1 m/s | 0.5 |
| 2007 | -8.5°C | -12.1°C | -15.6°C | 0.1°C | -31.1°C | 30 mm | 97% | 0.9 m/s | 0.6 |
| 2006 | -2.7°C | -6.5°C | -10.4°C | 0.7°C | -21.9°C | 28 mm | 98% | 1 m/s | 0.5 |
| 2005 | -1.9°C | -5.0°C | -8.0°C | 6.6°C | -23.0°C | 19 mm | 91% | 1 m/s | 0.5 |
| 2004 | -3.7°C | -7.1°C | -10.4°C | 5.0°C | -23.3°C | 50 mm | 88% | 1.3 m/s | 0.4 |
| 2003 | -4.4°C | -7.8°C | -11.3°C | 2.0°C | -18.2°C | 11 mm | 92% | 0.8 m/s | 0.6 |
| 2002 | -1.7°C | -4.7°C | -7.7°C | 4.4°C | -15.6°C | 9 mm | 92% | 0.7 m/s | 0.6 |
| 2001 | -6.7°C | -11.0°C | -15.2°C | 0.9°C | -23.3°C | 23 mm | 97% | 0.8 m/s | 0.5 |
| 2000 | -6.8°C | -10.2°C | -13.7°C | 6.3°C | -24.2°C | 20 mm | 90% | 0.9 m/s | 0.5 |
| 1999 | -1.3°C | -5.1°C | -8.9°C | 4.3°C | -22.9°C | 28 mm | 91% | 1 m/s | 0.5 |
| 1998 | -8.1°C | -11.9°C | -15.7°C | 1.5°C | -27.6°C | 38 mm | 94% | 1 m/s | 0.6 |
| 1997 | -0.2°C | -3.2°C | -6.1°C | 3.5°C | -20.6°C | 26 mm | 84% | 1.1 m/s | 0.5 |
| 1996 | -14.0°C | -18.2°C | -22.5°C | -1.0°C | -41.7°C | 33 mm | 99% | 0.9 m/s | 0.5 |
| 1995 | -11.1°C | -14.8°C | -18.6°C | 0.5°C | -35.7°C | 36 mm | 99% | 0.8 m/s | 0.6 |
| 1994 | -6.9°C | -10.8°C | -14.6°C | 0.5°C | -33.7°C | 34 mm | 97% | 0.8 m/s | 0.5 |
| 1993 | -2.7°C | -6.7°C | -10.6°C | 2.0°C | -18.7°C | 39 mm | 95% | 1 m/s | 0.5 |
| 1992 | -11.4°C | -16.1°C | -20.8°C | 1.0°C | -46.2°C | 47 mm | 93% | 0.9 m/s | 0.6 |
| 1991 | -4.0°C | -7.5°C | -10.9°C | 1.1°C | -22.6°C | 64 mm | 98% | 1 m/s | 0.5 |
| 1990 | -10.4°C | -15.5°C | -20.7°C | 1.0°C | -43.6°C | 60 mm | 97% | 1 m/s | 0.5 |
| 1989 | -3.2°C | -6.3°C | -9.4°C | 4.7°C | -30.5°C | 42 mm | 92% | 1 m/s | 0.5 |
| 1988 | -5.3°C | -9.0°C | -12.6°C | 3.2°C | -23.0°C | 25 mm | 90% | 0.9 m/s | 0.6 |
| 1987 | -2.9°C | -6.0°C | -9.1°C | 1.7°C | -17.8°C | 20 mm | 87% | 1 m/s | 0.5 |
| 1986 | -2.3°C | -6.0°C | -9.7°C | 1.6°C | -17.1°C | 9 mm | 91% | 0.9 m/s | 0.6 |
| 1985 | -3.4°C | -6.8°C | -10.2°C | 3.6°C | -28.6°C | 31 mm | 93% | 1 m/s | 0.5 |
| 1984 | -13.0°C | -18.3°C | -23.6°C | 0.7°C | -38.8°C | 35 mm | 97% | 1 m/s | 0.6 |
| 1983 ❄️ | -14.3°C | -18.4°C | -22.4°C | -0.3°C | -35.2°C | 26 mm | 95% | 0.9 m/s | — |
| 1982 | -7.1°C | -10.9°C | -14.6°C | -2.1°C | -24.1°C | 21 mm | 98% | 0.9 m/s | — |
| 1981 | -9.3°C | -13.0°C | -16.6°C | 1.5°C | -37.2°C | 38 mm | 95% | 0.9 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around -6.8°C with lows near -14.3°C (mean -10.5°C), based on 45 years of NASA POWER data.
December averages 35 mm of rainfall in Grande Prairie, one of the drier months. The wettest on record was 120 mm in 2013.
The hottest December reached 6.6°C in 2005. The coldest dipped to -46.2°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.5°C. Daytime highs moved from -9.4°C to -8.4°C and overnight lows from -17.5°C to -15.7°C over the same span.
December is one of the cooler months of the year in Grande Prairie and one of the drier months, so plan for around -6.8°C daytime highs and -14.3°C at night.
Not quite — December is the 2nd coolest month in Grande Prairie, averaging -10.5°C.
For December in Grande Prairie, pack warm layers and a jacket for chilly mornings, with typical highs of -6.8°C and lows of -14.3°C.
Relative humidity in December averages 94% — quite humid.
Average wind speed in December is 0.9 m/s. The windiest December on record averaged 1.3 m/s (2004).
The wettest December on record was 2013 with 120 mm. On average, December sees 35 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 Grande Prairie 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.
