December is one of the cooler months of the year in Corner Brook, with average highs near -1.6°C and lows around -6.5°C (mean -4°C). It is a relatively wet time of year, averaging 130 mm of rainfall and 93% relative humidity across the period.
December is one of the cooler months of the year in Corner Brook. Across 45 years of records, the warmest December in Corner Brook was 2010 — when the month averaged 1.3°C — while the coldest was 2013 at -7.5°C. Typical December days reach -1.6°C with nights near -6.5°C. The long-term trend is warming, about 0.6°C per decade.
December is a relatively wet time of year in Corner Brook, averaging 130 mm of rainfall. The wettest December on record was 1990 with 233 mm, while the driest was 1995 at 51 mm.
Relative humidity in Corner Brook during December averages 93%. The most humid December was 1989 at 98%, and the least humid was 2015 at 87%.
December receives about 0.7 kWh/m²/day of solar energy in Corner Brook. The sunniest Decembers were 1987, 2022 and 2024 at 0.9 kWh/m²/day, and the cloudiest was 1984 at 0.4.
Average wind speed in Corner Brook during December is 2.1 m/s. The windiest Decembers were 1998 and 2000 at 2.5 m/s, while the calmest was 1997 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -5.3°C | -4.6°C | -3.8°C | -3.6°C | -2.3°C | +3°C |
| Avg High | -2.7°C | -2.0°C | -1.5°C | -1.4°C | 0.0°C | +2.7°C |
| Avg Low | -7.9°C | -7.2°C | -6.2°C | -5.8°C | -4.6°C | +3.3°C |
| Avg Rain | 127 mm | 139 mm | 135 mm | 124 mm | 120 mm | -7 mm |
December temperatures in Corner Brook have risen by about 2°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -21.5°C (1984) to a record high of 12°C (2024).
Rainfall in December is a relatively wet time of year, averaging 130 mm, with a wettest year of 233 mm.
A quieter season to visit Corner Brook
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Corner Brook. That said, December — with days averaging -1.6°C and nights around -6.5°C (mean -4°C) and higher rainfall (130 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 | -1.4°C | -3.9°C | -6.4°C | 9.9°C | -10.2°C | 133 mm | 91% | 2.4 m/s | — |
| 2024 | -0.1°C | -2.3°C | -4.5°C | 12.0°C | -9.4°C | 95 mm | 89% | 2 m/s | 0.9 |
| 2023 | 0.5°C | -2.1°C | -4.7°C | 10.6°C | -13.4°C | 154 mm | 92% | 2.2 m/s | 0.8 |
| 2022 | -0.1°C | -2.2°C | -4.2°C | 3.5°C | -9.5°C | 64 mm | 90% | 2.1 m/s | 0.9 |
| 2021 | -0.8°C | -3.1°C | -5.3°C | 11.3°C | -10.3°C | 170 mm | 90% | 2.4 m/s | 0.8 |
| 2020 | 1.9°C | -0.3°C | -2.5°C | 10.5°C | -8.5°C | 105 mm | 93% | 1.9 m/s | 0.7 |
| 2019 | -2.0°C | -4.2°C | -6.4°C | 7.2°C | -11.3°C | 179 mm | 93% | 2.1 m/s | 0.6 |
| 2018 | -3.2°C | -5.1°C | -7.1°C | 2.7°C | -12.9°C | 105 mm | 94% | 2 m/s | 0.8 |
| 2017 | -1.5°C | -3.6°C | -5.7°C | 5.7°C | -10.4°C | 156 mm | 92% | 2.3 m/s | 0.7 |
| 2016 | -2.4°C | -5.2°C | -8.1°C | 1.8°C | -14.4°C | 118 mm | 94% | 2.3 m/s | 0.7 |
| 2015 | -1.4°C | -3.6°C | -5.7°C | 4.8°C | -13.2°C | 76 mm | 87% | 2 m/s | 0.8 |
| 2014 | -0.2°C | -2.7°C | -5.2°C | 7.9°C | -12.4°C | 136 mm | 89% | 2 m/s | 0.7 |
| 2013 ❄️ | -5.3°C | -7.5°C | -9.7°C | 2.7°C | -16.1°C | 184 mm | 95% | 2.2 m/s | 0.7 |
| 2012 | -0.4°C | -2.4°C | -4.5°C | 5.7°C | -9.6°C | 128 mm | 93% | 2.2 m/s | 0.7 |
| 2011 | -0.4°C | -3.1°C | -5.7°C | 10.8°C | -12.2°C | 86 mm | 88% | 2.1 m/s | 0.8 |
| 2010 🔥 | 2.9°C | 1.3°C | -0.2°C | 8.0°C | -7.8°C | 74 mm | 92% | 2.3 m/s | 0.7 |
| 2009 | -1.3°C | -3.4°C | -5.4°C | 2.2°C | -11.5°C | 113 mm | 93% | 2.2 m/s | 0.7 |
| 2008 | 0.0°C | -3.4°C | -6.8°C | 11.6°C | -13.9°C | 195 mm | 90% | 2.3 m/s | 0.6 |
| 2007 | -4.4°C | -6.6°C | -8.8°C | 3.2°C | -18.5°C | 98 mm | 93% | 2.2 m/s | 0.7 |
| 2006 | -1.9°C | -4.3°C | -6.6°C | 5.9°C | -12.8°C | 126 mm | 92% | 2.1 m/s | 0.7 |
| 2005 | -0.8°C | -2.8°C | -4.8°C | 5.8°C | -13.0°C | 147 mm | 93% | 2.2 m/s | 0.6 |
| 2004 | -1.6°C | -4.3°C | -7.1°C | 7.4°C | -12.6°C | 174 mm | 94% | 2.2 m/s | 0.6 |
| 2003 | 0.0°C | -2.2°C | -4.4°C | 6.8°C | -10.1°C | 101 mm | 92% | 2 m/s | 0.7 |
| 2002 | -2.9°C | -5.2°C | -7.6°C | 0.6°C | -16.1°C | 103 mm | 97% | 2 m/s | 0.7 |
| 2001 | -0.2°C | -2.3°C | -4.3°C | 6.2°C | -9.8°C | 138 mm | 92% | 1.9 m/s | 0.8 |
| 2000 | -1.6°C | -4.0°C | -6.4°C | 7.0°C | -11.7°C | 158 mm | 93% | 2.5 m/s | 0.8 |
| 1999 | -1.3°C | -3.0°C | -4.8°C | 6.1°C | -10.3°C | 145 mm | 93% | 2.2 m/s | 0.6 |
| 1998 | -1.7°C | -4.4°C | -7.1°C | 5.8°C | -12.9°C | 155 mm | 91% | 2.5 m/s | 0.7 |
| 1997 | -2.4°C | -4.6°C | -6.7°C | 1.2°C | -14.6°C | 93 mm | 96% | 1.8 m/s | 0.7 |
| 1996 | 0.7°C | -1.9°C | -4.4°C | 9.4°C | -15.0°C | 112 mm | 91% | 2.1 m/s | 0.7 |
| 1995 | -2.9°C | -5.0°C | -7.1°C | 1.5°C | -14.2°C | 51 mm | 92% | 2 m/s | 0.8 |
| 1994 | -2.8°C | -5.7°C | -8.6°C | 0.6°C | -14.6°C | 96 mm | 95% | 1.9 m/s | 0.7 |
| 1993 | -1.0°C | -3.5°C | -5.9°C | 8.0°C | -16.0°C | 203 mm | 92% | 2 m/s | 0.6 |
| 1992 | -3.5°C | -6.5°C | -9.6°C | 1.3°C | -18.2°C | 166 mm | 96% | 2 m/s | 0.6 |
| 1991 | -3.9°C | -7.1°C | -10.3°C | 4.3°C | -14.3°C | 132 mm | 93% | 2.2 m/s | 0.5 |
| 1990 🌧️ | -0.8°C | -4.3°C | -7.7°C | 6.6°C | -18.7°C | 233 mm | 93% | 2.2 m/s | 0.6 |
| 1989 | -4.8°C | -7.2°C | -9.5°C | 0.5°C | -15.6°C | 138 mm | 98% | 2.2 m/s | 0.6 |
| 1988 | -3.3°C | -5.6°C | -7.9°C | 2.5°C | -16.2°C | 130 mm | 93% | 2.1 m/s | 0.8 |
| 1987 | -3.4°C | -5.3°C | -7.2°C | 4.6°C | -16.7°C | 103 mm | 96% | 2.1 m/s | 0.9 |
| 1986 | -3.0°C | -6.2°C | -9.3°C | 1.9°C | -19.3°C | 75 mm | 95% | 2.2 m/s | 0.5 |
| 1985 | -3.8°C | -5.9°C | -8.0°C | 6.4°C | -11.8°C | 115 mm | 92% | 2.3 m/s | 0.6 |
| 1984 | -1.6°C | -5.1°C | -8.5°C | 8.2°C | -21.5°C | 119 mm | 91% | 2.3 m/s | 0.4 |
| 1983 | -2.9°C | -5.4°C | -7.9°C | 4.2°C | -15.6°C | 151 mm | 93% | 2.4 m/s | — |
| 1982 | -1.7°C | -5.0°C | -8.3°C | 4.9°C | -16.0°C | 157 mm | 91% | 2.2 m/s | — |
| 1981 | -0.2°C | -2.2°C | -4.3°C | 8.4°C | -17.1°C | 157 mm | 94% | 1.9 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around -1.6°C with lows near -6.5°C (mean -4°C), based on 45 years of NASA POWER data.
December averages 130 mm of rainfall in Corner Brook, a relatively wet time of year. The wettest on record was 233 mm in 1990.
The hottest December reached 12°C in 2024. The coldest dipped to -21.5°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 2°C. Daytime highs moved from -2°C to -0.4°C and overnight lows from -7.4°C to -5°C over the same span.
December is one of the cooler months of the year in Corner Brook and a relatively wet time of year, so plan for around -1.6°C daytime highs and -6.5°C at night.
Not quite — December is the 4th coolest month in Corner Brook, averaging -4°C.
For December in Corner Brook, pack warm layers and a jacket for chilly mornings, with typical highs of -1.6°C and lows of -6.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 93% — quite humid.
Average wind speed in December is 2.1 m/s. The windiest December on record averaged 2.5 m/s (1998).
The wettest December on record was 1990 with 233 mm. On average, December sees 130 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 Corner Brook 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.
