December is one of the cooler months of the year in Port Alberni, with average highs near 4.6°C and lows around 0.7°C (mean 2.7°C). It is a relatively wet time of year, averaging 258 mm of rainfall and 93% relative humidity across the period.
December is one of the cooler months of the year in Port Alberni. Across 45 years of records, the warmest December in Port Alberni was 2023 — when the month averaged 5.6°C — while the coldest was 1983 at -1°C. Typical December days reach 4.6°C with nights near 0.7°C. The long-term trend is warming, about 0.2°C per decade.
December is a relatively wet time of year in Port Alberni, averaging 258 mm of rainfall. The wettest December on record was 1998 with 468 mm, while the driest was 2013 at 77 mm.
Relative humidity in Port Alberni during December averages 93%. The most humid December was 2025 at 97%, and the least humid was 2009 at 86%.
December receives about 0.7 kWh/m²/day of solar energy in Port Alberni. The sunniest Decembers were 2017, 2021 and 2022, among others at 0.8 kWh/m²/day, and the cloudiest were 2006 and 2019 at 0.5.
Average wind speed in Port Alberni during December is 1.2 m/s. The windiest Decembers were 2010, 2015 and 2018, among others at 1.3 m/s, while the calmest were 1989 and 2013 at 0.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 2.2°C | 2.7°C | 2.6°C | 2.7°C | 3.3°C | +1.1°C |
| Avg High | 4.3°C | 4.6°C | 4.5°C | 4.5°C | 5.2°C | +0.9°C |
| Avg Low | 0.1°C | 0.7°C | 0.6°C | 0.8°C | 1.3°C | +1.2°C |
| Avg Rain | 247 mm | 322 mm | 241 mm | 237 mm | 233 mm | -14 mm |
December temperatures in Port Alberni have risen by about 1.9°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -12.9°C (1990) to a record high of 11.9°C (2014).
Rainfall in December is a relatively wet time of year, averaging 258 mm, with a wettest year of 468 mm.
A quieter season to visit Port Alberni
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Port Alberni. That said, December — with days averaging 4.6°C and nights around 0.7°C (mean 2.7°C) and higher rainfall (258 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 | 4.2°C | 2.5°C | 11.9°C | -5.2°C | 277 mm | 97% | 1.1 m/s | — |
| 2024 | 6.6°C | 4.8°C | 2.9°C | 9.4°C | -0.5°C | 258 mm | 95% | 1.2 m/s | 0.6 |
| 2023 🔥 | 7.4°C | 5.6°C | 3.8°C | 10.9°C | -0.2°C | 260 mm | 95% | 1.1 m/s | 0.7 |
| 2022 | 3.3°C | 1.1°C | -1.2°C | 9.6°C | -9.3°C | 195 mm | 92% | 1.1 m/s | 0.8 |
| 2021 | 2.0°C | -0.2°C | -2.4°C | 9.6°C | -10.7°C | 161 mm | 93% | 1.1 m/s | 0.8 |
| 2020 | 5.9°C | 4.0°C | 2.0°C | 9.6°C | -3.4°C | 246 mm | 95% | 1.1 m/s | 0.7 |
| 2019 | 5.4°C | 3.9°C | 2.4°C | 9.4°C | -1.4°C | 259 mm | 97% | 1 m/s | 0.5 |
| 2018 | 5.7°C | 3.5°C | 1.2°C | 9.3°C | -3.7°C | 405 mm | 94% | 1.3 m/s | 0.7 |
| 2017 | 4.6°C | 2.4°C | 0.2°C | 8.9°C | -5.1°C | 103 mm | 90% | 1.1 m/s | 0.8 |
| 2016 | 2.6°C | 0.5°C | -1.6°C | 8.7°C | -7.2°C | 193 mm | 92% | 1.2 m/s | 0.8 |
| 2015 | 4.7°C | 2.8°C | 1.0°C | 10.7°C | -7.2°C | 339 mm | 95% | 1.3 m/s | 0.6 |
| 2014 | 6.3°C | 4.4°C | 2.4°C | 11.9°C | -5.3°C | 251 mm | 92% | 1.2 m/s | 0.7 |
| 2013 | 3.5°C | 1.6°C | -0.3°C | 7.6°C | -8.7°C | 77 mm | 91% | 0.9 m/s | 0.8 |
| 2012 | 3.5°C | 2.3°C | 1.0°C | 7.5°C | -2.2°C | 254 mm | 96% | 1.1 m/s | 0.6 |
| 2011 | 4.7°C | 2.6°C | 0.5°C | 8.3°C | -3.8°C | 118 mm | 94% | 1 m/s | 0.8 |
| 2010 | 4.2°C | 2.6°C | 1.0°C | 8.3°C | -5.6°C | 366 mm | 94% | 1.3 m/s | 0.6 |
| 2009 | 3.9°C | 1.5°C | -0.9°C | 8.0°C | -6.6°C | 137 mm | 86% | 1.1 m/s | 0.8 |
| 2008 | 2.5°C | 0.2°C | -2.0°C | 9.2°C | -11.4°C | 135 mm | 90% | 1.2 m/s | 0.7 |
| 2007 | 3.4°C | 1.8°C | 0.2°C | 9.9°C | -3.9°C | 305 mm | 96% | 1.2 m/s | 0.6 |
| 2006 | 4.7°C | 3.1°C | 1.4°C | 9.4°C | -2.8°C | 333 mm | 94% | 1.3 m/s | 0.5 |
| 2005 | 5.5°C | 3.4°C | 1.4°C | 10.8°C | -2.8°C | 257 mm | 92% | 1.2 m/s | 0.7 |
| 2004 | 5.7°C | 3.8°C | 1.9°C | 10.0°C | -2.0°C | 212 mm | 95% | 1.1 m/s | 0.6 |
| 2003 | 4.8°C | 3.1°C | 1.5°C | 8.8°C | -5.8°C | 286 mm | 93% | 1.2 m/s | 0.6 |
| 2002 | 6.1°C | 4.1°C | 2.1°C | 10.6°C | -2.8°C | 234 mm | 94% | 1.2 m/s | 0.6 |
| 2001 | 4.4°C | 2.4°C | 0.4°C | 7.9°C | -4.2°C | 309 mm | 94% | 1.3 m/s | 0.7 |
| 2000 | 4.2°C | 2.3°C | 0.4°C | 7.6°C | -6.7°C | 203 mm | 90% | 1.2 m/s | 0.7 |
| 1999 | 6.4°C | 4.4°C | 2.5°C | 9.6°C | 0.4°C | 360 mm | 93% | 1.2 m/s | 0.7 |
| 1998 🌧️ | 4.4°C | 2.6°C | 0.7°C | 10.1°C | -9.5°C | 468 mm | 93% | 1.2 m/s | 0.7 |
| 1997 | 6.5°C | 4.6°C | 2.7°C | 9.8°C | -1.0°C | 271 mm | 93% | 1.2 m/s | 0.6 |
| 1996 | 2.3°C | 0.4°C | -1.6°C | 8.1°C | -10.8°C | 309 mm | 93% | 1.3 m/s | 0.6 |
| 1995 | 5.2°C | 3.4°C | 1.5°C | 8.3°C | -5.7°C | 349 mm | 91% | 1.3 m/s | 0.7 |
| 1994 | 4.5°C | 2.8°C | 1.1°C | 9.5°C | -5.4°C | 338 mm | 92% | 1.3 m/s | 0.7 |
| 1993 | 5.4°C | 3.5°C | 1.5°C | 9.8°C | -1.3°C | 364 mm | 93% | 1.1 m/s | 0.6 |
| 1992 | 2.9°C | 0.7°C | -1.5°C | 7.6°C | -8.0°C | 196 mm | 94% | 1.3 m/s | 0.7 |
| 1991 | 6.0°C | 4.0°C | 2.1°C | 9.7°C | -1.9°C | 274 mm | 94% | 1.2 m/s | 0.7 |
| 1990 | 2.6°C | 0.2°C | -2.2°C | 8.8°C | -12.9°C | 290 mm | 90% | 1.2 m/s | 0.7 |
| 1989 | 6.7°C | 4.9°C | 3.0°C | 10.7°C | -1.1°C | 174 mm | 96% | 0.9 m/s | 0.6 |
| 1988 | 5.1°C | 3.2°C | 1.3°C | 9.1°C | -4.9°C | 211 mm | 93% | 1 m/s | 0.7 |
| 1987 | 3.9°C | 1.8°C | -0.2°C | 9.5°C | -4.7°C | 309 mm | 94% | 1.3 m/s | 0.7 |
| 1986 | 5.8°C | 3.9°C | 1.9°C | 9.0°C | -1.8°C | 320 mm | 93% | 1.2 m/s | 0.7 |
| 1985 | 4.5°C | 2.2°C | 0.0°C | 9.0°C | -11.5°C | 131 mm | 90% | 1.1 m/s | 0.7 |
| 1984 | 2.5°C | 0.2°C | -2.1°C | 7.2°C | -8.7°C | 204 mm | 91% | 1.1 m/s | 0.8 |
| 1983 ❄️ | 1.4°C | -1.0°C | -3.4°C | 6.0°C | -12.1°C | 168 mm | 87% | 1.2 m/s | — |
| 1982 | 4.9°C | 2.7°C | 0.5°C | 9.6°C | -3.7°C | 300 mm | 93% | 1.2 m/s | — |
| 1981 | 4.0°C | 2.1°C | 0.2°C | 8.7°C | -6.1°C | 403 mm | 94% | 1.2 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 4.6°C with lows near 0.7°C (mean 2.7°C), based on 45 years of NASA POWER data.
December averages 258 mm of rainfall in Port Alberni, a relatively wet time of year. The wettest on record was 468 mm in 1998.
The hottest December reached 11.9°C in 2014. The coldest dipped to -12.9°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.9°C. Daytime highs moved from 3.5°C to 5°C and overnight lows from -1°C to 1.1°C over the same span.
December is one of the cooler months of the year in Port Alberni and a relatively wet time of year, so plan for around 4.6°C daytime highs and 0.7°C at night.
Yes — December is the coldest month of the year in Port Alberni, averaging 2.7°C.
For December in Port Alberni, pack warm layers and a jacket for chilly mornings, with typical highs of 4.6°C and lows of 0.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 93% — quite humid.
Average wind speed in December is 1.2 m/s. The windiest December on record averaged 1.3 m/s (1987).
The wettest December on record was 1998 with 468 mm. On average, December sees 258 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 Port Alberni 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.
