December is one of the cooler months of the year in Prince Rupert, with average highs near 3.3°C and lows around 0.5°C (mean 1.9°C). It is a relatively wet time of year, averaging 246 mm of rainfall and 87% relative humidity across the period.
December is one of the cooler months of the year in Prince Rupert. Across 45 years of records, the warmest December in Prince Rupert was 1997 — when the month averaged 5.1°C — while the coldest was 1983 at -2.8°C. Typical December days reach 3.3°C with nights near 0.5°C. The long-term trend is warming, about 0.2°C per decade.
December is a relatively wet time of year in Prince Rupert, averaging 246 mm of rainfall. The wettest December on record was 1991 with 494 mm, while the driest was 1983 at 87 mm.
Relative humidity in Prince Rupert during December averages 87%. The most humid December was 1989 at 92%, and the least humid was 2009 at 81%.
December receives about 0.4 kWh/m²/day of solar energy in Prince Rupert. The sunniest Decembers were 2017, 2021 and 2022, among others at 0.5 kWh/m²/day, and the cloudiest was 1991 at 0.2.
Average wind speed in Prince Rupert during December is 4.7 m/s. The windiest December was 2006 at 6.2 m/s, while the calmest were 2015, 2017 and 2021, among others at 4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 1.4°C | 1.9°C | 1.9°C | 2.2°C | 2.0°C | +0.6°C |
| Avg High | 2.9°C | 3.4°C | 3.4°C | 3.5°C | 3.5°C | +0.6°C |
| Avg Low | -0.1°C | 0.4°C | 0.4°C | 0.9°C | 0.6°C | +0.7°C |
| Avg Rain | 227 mm | 290 mm | 257 mm | 208 mm | 250 mm | +23 mm |
December temperatures in Prince Rupert have risen by about 1.6°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -17.6°C (1992) to a record high of 10.6°C (2014).
Rainfall in December is a relatively wet time of year, averaging 246 mm, with a wettest year of 494 mm.
A quieter season to visit Prince Rupert
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Prince Rupert. That said, December — with days averaging 3.3°C and nights around 0.5°C (mean 1.9°C) and higher rainfall (246 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 | 3.7°C | 2.0°C | 0.4°C | 8.2°C | -8.4°C | 375 mm | 89% | 4.9 m/s | — |
| 2024 | 5.7°C | 4.7°C | 3.8°C | 8.6°C | -2.9°C | 274 mm | 88% | 4.8 m/s | 0.4 |
| 2023 | 5.8°C | 4.5°C | 3.2°C | 9.6°C | 1.3°C | 326 mm | 88% | 5.2 m/s | 0.3 |
| 2022 | 0.8°C | -0.9°C | -2.5°C | 7.0°C | -15.2°C | 119 mm | 87% | 4.1 m/s | 0.5 |
| 2021 | -0.6°C | -2.5°C | -4.4°C | 5.4°C | -14.8°C | 130 mm | 86% | 4 m/s | 0.5 |
| 2020 | 5.5°C | 4.3°C | 3.1°C | 9.5°C | 0.5°C | 279 mm | 87% | 5.2 m/s | 0.3 |
| 2019 | 4.6°C | 3.5°C | 2.5°C | 6.8°C | -2.7°C | 226 mm | 89% | 4.3 m/s | 0.4 |
| 2018 | 4.5°C | 3.4°C | 2.2°C | 7.7°C | -0.8°C | 232 mm | 84% | 5 m/s | 0.4 |
| 2017 | 3.7°C | 2.2°C | 0.7°C | 9.6°C | -10.6°C | 131 mm | 83% | 4 m/s | 0.5 |
| 2016 | 0.8°C | -0.8°C | -2.4°C | 7.6°C | -10.3°C | 199 mm | 84% | 4.6 m/s | 0.5 |
| 2015 | 3.4°C | 2.3°C | 1.1°C | 7.6°C | -4.7°C | 132 mm | 85% | 4 m/s | 0.4 |
| 2014 | 5.3°C | 4.1°C | 2.8°C | 10.6°C | -4.3°C | 192 mm | 87% | 4.8 m/s | 0.4 |
| 2013 | 4.0°C | 2.6°C | 1.3°C | 8.1°C | -6.4°C | 348 mm | 87% | 4.4 m/s | 0.4 |
| 2012 | 2.2°C | 1.0°C | -0.2°C | 5.5°C | -7.0°C | 211 mm | 87% | 4.5 m/s | 0.4 |
| 2011 | 3.9°C | 2.8°C | 1.8°C | 7.0°C | -1.2°C | 266 mm | 87% | 4.5 m/s | 0.3 |
| 2010 | 2.5°C | 1.0°C | -0.5°C | 5.5°C | -7.9°C | 139 mm | 87% | 4.6 m/s | 0.4 |
| 2009 | 1.5°C | -0.4°C | -2.3°C | 6.6°C | -11.0°C | 88 mm | 81% | 4.2 m/s | 0.5 |
| 2008 | 0.6°C | -1.3°C | -3.1°C | 7.3°C | -12.5°C | 228 mm | 84% | 4.6 m/s | 0.5 |
| 2007 | 1.4°C | 0.0°C | -1.4°C | 5.2°C | -12.2°C | 272 mm | 89% | 4.9 m/s | 0.4 |
| 2006 | 4.7°C | 3.6°C | 2.4°C | 7.8°C | -0.3°C | 430 mm | 88% | 6.2 m/s | 0.3 |
| 2005 | 5.3°C | 3.9°C | 2.6°C | 9.7°C | -4.7°C | 287 mm | 87% | 4.8 m/s | 0.4 |
| 2004 | 4.1°C | 2.5°C | 0.9°C | 9.7°C | -11.0°C | 312 mm | 87% | 5 m/s | 0.4 |
| 2003 | 4.4°C | 3.1°C | 1.8°C | 8.3°C | -3.2°C | 254 mm | 87% | 5.1 m/s | 0.4 |
| 2002 | 5.7°C | 4.5°C | 3.3°C | 10.1°C | -0.1°C | 234 mm | 86% | 5.3 m/s | 0.4 |
| 2001 | 3.0°C | 1.6°C | 0.2°C | 7.3°C | -7.7°C | 252 mm | 86% | 5.1 m/s | 0.4 |
| 2000 | 3.0°C | 1.5°C | 0.0°C | 8.3°C | -9.1°C | 211 mm | 85% | 4.7 m/s | 0.5 |
| 1999 | 4.9°C | 3.8°C | 2.6°C | 8.6°C | -2.2°C | 251 mm | 90% | 4.3 m/s | 0.4 |
| 1998 | 3.5°C | 2.1°C | 0.6°C | 8.4°C | -7.4°C | 307 mm | 85% | 5 m/s | 0.4 |
| 1997 🔥 | 6.5°C | 5.1°C | 3.8°C | 9.6°C | -0.5°C | 347 mm | 88% | 5.3 m/s | 0.3 |
| 1996 | -0.6°C | -2.2°C | -3.8°C | 4.6°C | -14.9°C | 202 mm | 88% | 5.6 m/s | 0.5 |
| 1995 | 2.4°C | 0.9°C | -0.5°C | 6.7°C | -13.9°C | 229 mm | 89% | 5.1 m/s | 0.3 |
| 1994 | 2.8°C | 1.3°C | -0.1°C | 6.3°C | -11.4°C | 191 mm | 87% | 4.6 m/s | 0.4 |
| 1993 | 5.7°C | 4.5°C | 3.3°C | 8.9°C | -1.4°C | 217 mm | 89% | 4.9 m/s | 0.3 |
| 1992 | 1.1°C | -1.0°C | -3.1°C | 8.1°C | -17.6°C | 265 mm | 89% | 5.1 m/s | 0.4 |
| 1991 🌧️ | 5.9°C | 4.6°C | 3.4°C | 9.3°C | -0.2°C | 494 mm | 90% | 5.6 m/s | 0.2 |
| 1990 | 2.1°C | 0.1°C | -1.9°C | 7.6°C | -14.3°C | 392 mm | 89% | 4.2 m/s | 0.3 |
| 1989 | 6.2°C | 4.9°C | 3.6°C | 9.6°C | -6.4°C | 381 mm | 92% | 4.3 m/s | 0.3 |
| 1988 | 3.1°C | 1.6°C | 0.1°C | 7.8°C | -5.1°C | 231 mm | 85% | 4 m/s | 0.4 |
| 1987 | 3.5°C | 2.4°C | 1.3°C | 7.1°C | -5.1°C | 291 mm | 86% | 4.9 m/s | 0.4 |
| 1986 | 4.7°C | 3.4°C | 2.0°C | 8.2°C | -2.6°C | 219 mm | 87% | 4.5 m/s | 0.3 |
| 1985 | 3.5°C | 2.2°C | 0.9°C | 8.0°C | -10.7°C | 201 mm | 88% | 4 m/s | 0.3 |
| 1984 | 0.4°C | -1.5°C | -3.4°C | 6.7°C | -16.2°C | 292 mm | 88% | 4.2 m/s | 0.4 |
| 1983 ❄️ | -0.8°C | -2.8°C | -4.9°C | 5.5°C | -10.7°C | 87 mm | 90% | 4 m/s | — |
| 1982 | 3.2°C | 1.8°C | 0.5°C | 4.8°C | -2.0°C | 154 mm | 87% | 4 m/s | — |
| 1981 | 2.1°C | 0.4°C | -1.3°C | 5.9°C | -10.0°C | 189 mm | 89% | 4.7 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 3.3°C with lows near 0.5°C (mean 1.9°C), based on 45 years of NASA POWER data.
December averages 246 mm of rainfall in Prince Rupert, a relatively wet time of year. The wettest on record was 494 mm in 1991.
The hottest December reached 10.6°C in 2014. The coldest dipped to -17.6°C in 1992.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.6°C. Daytime highs moved from 1.7°C to 3.1°C and overnight lows from -1.6°C to 0.1°C over the same span.
December is one of the cooler months of the year in Prince Rupert and a relatively wet time of year, so plan for around 3.3°C daytime highs and 0.5°C at night.
Not quite — December is the 2nd coolest month in Prince Rupert, averaging 1.9°C.
For December in Prince Rupert, pack warm layers and a jacket for chilly mornings, with typical highs of 3.3°C and lows of 0.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 87% — quite humid.
Average wind speed in December is 4.7 m/s. The windiest December on record averaged 6.2 m/s (2006).
The wettest December on record was 1991 with 494 mm. On average, December sees 246 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 Prince Rupert 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.
