December is one of the cooler months of the year in Coquitlam, with average highs near -1.4°C and lows around -6.6°C (mean -4°C). It is a relatively wet time of year, averaging 305 mm of rainfall and 97% relative humidity across the period.
December is one of the cooler months of the year in Coquitlam. Across 45 years of records, the warmest December in Coquitlam was 2023 — when the month averaged 0.1°C — while the coldest was 1983 at -10.3°C. Typical December days reach -1.4°C with nights near -6.6°C. The long-term trend is warming, about 0.5°C per decade.
December is a relatively wet time of year in Coquitlam, averaging 305 mm of rainfall. The wettest December on record was 1998 with 509 mm, while the driest was 1985 at 77 mm.
Relative humidity in Coquitlam during December averages 97%. The most humid Decembers were 1983 and 2016 at 99%, and the least humid was 1988 at 93%.
December receives about 0.7 kWh/m²/day of solar energy in Coquitlam. The sunniest December was 2009 at 0.9 kWh/m²/day, and the cloudiest were 2006, 2012 and 2019 at 0.5.
Average wind speed in Coquitlam during December is 0.3 m/s. The windiest December was 2011 at 0.5 m/s, while the calmest were 2022, 2024 and 2025, among others at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -5.0°C | -4.3°C | -3.8°C | -3.8°C | -2.8°C | +2.2°C |
| Avg High | -2.0°C | -1.8°C | -1.1°C | -1.2°C | -0.5°C | +1.5°C |
| Avg Low | -7.9°C | -6.8°C | -6.6°C | -6.3°C | -5.2°C | +2.7°C |
| Avg Rain | 248 mm | 335 mm | 296 mm | 304 mm | 363 mm | +115 mm |
December temperatures in Coquitlam have risen by about 3.2°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -29°C (1990) to a record high of 9.2°C (2014).
Rainfall in December is a relatively wet time of year, averaging 305 mm, with a wettest year of 509 mm.
A quieter season to visit Coquitlam
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Coquitlam. That said, December — with days averaging -1.4°C and nights around -6.6°C (mean -4°C) and higher rainfall (305 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 | 0.5°C | -1.3°C | -3.2°C | 7.3°C | -22.0°C | 504 mm | 99% | 0.3 m/s | — |
| 2024 | 0.8°C | -1.1°C | -3.0°C | 4.2°C | -8.6°C | 353 mm | 97% | 0.3 m/s | 0.7 |
| 2023 🔥 | 2.1°C | 0.1°C | -1.8°C | 6.1°C | -8.3°C | 338 mm | 97% | 0.4 m/s | 0.6 |
| 2022 | -3.4°C | -6.5°C | -9.6°C | 3.4°C | -23.7°C | 322 mm | 99% | 0.3 m/s | 0.8 |
| 2021 | -3.7°C | -6.8°C | -10.0°C | 7.6°C | -27.4°C | 295 mm | 97% | 0.3 m/s | 0.8 |
| 2020 | 0.9°C | -1.3°C | -3.5°C | 5.5°C | -16.0°C | 363 mm | 95% | 0.3 m/s | 0.7 |
| 2019 | 0.5°C | -1.5°C | -3.5°C | 4.2°C | -13.0°C | 295 mm | 97% | 0.3 m/s | 0.5 |
| 2018 | -0.5°C | -3.0°C | -5.5°C | 1.3°C | -15.1°C | 467 mm | 97% | 0.3 m/s | 0.7 |
| 2017 | -1.7°C | -4.8°C | -7.9°C | 3.4°C | -18.1°C | 186 mm | 95% | 0.3 m/s | 0.8 |
| 2016 | -4.4°C | -7.3°C | -10.2°C | 0.3°C | -21.6°C | 231 mm | 99% | 0.3 m/s | 0.7 |
| 2015 | -1.1°C | -3.2°C | -5.3°C | 3.3°C | -17.7°C | 476 mm | 99% | 0.3 m/s | 0.6 |
| 2014 | 1.1°C | -1.4°C | -3.9°C | 9.2°C | -19.0°C | 356 mm | 95% | 0.3 m/s | 0.8 |
| 2013 | -2.1°C | -4.8°C | -7.5°C | 3.3°C | -21.4°C | 136 mm | 94% | 0.3 m/s | 0.7 |
| 2012 | -1.5°C | -3.9°C | -6.3°C | 0.6°C | -14.3°C | 324 mm | 99% | 0.3 m/s | 0.5 |
| 2011 | -1.0°C | -4.1°C | -7.1°C | 4.9°C | -15.7°C | 181 mm | 95% | 0.5 m/s | 0.8 |
| 2010 | -1.5°C | -3.6°C | -5.6°C | 2.4°C | -21.9°C | 383 mm | 99% | 0.3 m/s | 0.6 |
| 2009 | -4.0°C | -7.3°C | -10.6°C | 3.7°C | -21.5°C | 172 mm | 98% | 0.4 m/s | 0.9 |
| 2008 | -3.9°C | -7.0°C | -10.1°C | 6.3°C | -26.0°C | 206 mm | 96% | 0.3 m/s | 0.7 |
| 2007 | -0.9°C | -3.2°C | -5.5°C | 4.0°C | -13.0°C | 430 mm | 97% | 0.3 m/s | 0.6 |
| 2006 | -0.2°C | -2.7°C | -5.1°C | 8.2°C | -16.7°C | 355 mm | 96% | 0.3 m/s | 0.5 |
| 2005 | 0.5°C | -2.7°C | -5.9°C | 8.4°C | -12.9°C | 282 mm | 94% | 0.4 m/s | 0.7 |
| 2004 | 0.2°C | -2.0°C | -4.2°C | 3.8°C | -10.1°C | 327 mm | 98% | 0.3 m/s | 0.7 |
| 2003 | -1.1°C | -3.3°C | -5.6°C | 2.6°C | -16.9°C | 306 mm | 99% | 0.3 m/s | 0.6 |
| 2002 | 1.4°C | -1.4°C | -4.2°C | 7.0°C | -14.2°C | 352 mm | 97% | 0.3 m/s | 0.6 |
| 2001 | -1.3°C | -4.2°C | -7.1°C | 0.7°C | -13.2°C | 341 mm | 99% | 0.3 m/s | 0.7 |
| 2000 | -1.6°C | -4.7°C | -7.8°C | 3.4°C | -18.5°C | 187 mm | 98% | 0.3 m/s | 0.7 |
| 1999 | -0.1°C | -2.0°C | -3.9°C | 1.4°C | -9.8°C | 376 mm | 97% | 0.4 m/s | 0.6 |
| 1998 🌧️ | -2.3°C | -4.2°C | -6.2°C | 2.5°C | -27.0°C | 509 mm | 99% | 0.3 m/s | 0.6 |
| 1997 | 0.3°C | -1.9°C | -4.1°C | 3.2°C | -10.9°C | 302 mm | 96% | 0.3 m/s | 0.7 |
| 1996 | -3.9°C | -6.7°C | -9.6°C | 0.6°C | -23.2°C | 344 mm | 98% | 0.3 m/s | 0.6 |
| 1995 | -1.2°C | -3.6°C | -6.1°C | 2.2°C | -18.9°C | 331 mm | 98% | 0.3 m/s | 0.7 |
| 1994 | -2.0°C | -4.3°C | -6.6°C | 3.9°C | -20.9°C | 389 mm | 99% | 0.3 m/s | 0.7 |
| 1993 | -0.5°C | -3.1°C | -5.7°C | 2.6°C | -13.3°C | 317 mm | 95% | 0.4 m/s | 0.7 |
| 1992 | -4.0°C | -7.0°C | -10.0°C | 0.1°C | -22.9°C | 181 mm | 99% | 0.3 m/s | 0.7 |
| 1991 | 0.6°C | -1.5°C | -3.7°C | 3.7°C | -11.9°C | 220 mm | 97% | 0.3 m/s | 0.6 |
| 1990 | -4.9°C | -8.2°C | -11.6°C | 0.6°C | -29.0°C | 378 mm | 99% | 0.4 m/s | 0.7 |
| 1989 | 1.9°C | -0.6°C | -3.1°C | 7.9°C | -8.4°C | 227 mm | 96% | 0.3 m/s | 0.6 |
| 1988 | -0.3°C | -3.1°C | -5.9°C | 4.8°C | -16.8°C | 231 mm | 93% | 0.4 m/s | 0.7 |
| 1987 | -2.9°C | -6.1°C | -9.3°C | 1.3°C | -17.4°C | 350 mm | 96% | 0.4 m/s | 0.7 |
| 1986 | -0.5°C | -3.3°C | -6.1°C | 2.7°C | -12.7°C | 247 mm | 98% | 0.3 m/s | 0.7 |
| 1985 | -1.0°C | -3.9°C | -6.9°C | 3.4°C | -20.1°C | 77 mm | 95% | 0.4 m/s | 0.7 |
| 1984 | -4.9°C | -8.5°C | -12.0°C | 0.2°C | -25.2°C | 222 mm | 97% | 0.4 m/s | 0.7 |
| 1983 ❄️ | -6.5°C | -10.3°C | -14.0°C | 0.9°C | -28.6°C | 149 mm | 99% | 0.3 m/s | — |
| 1982 | -1.7°C | -4.2°C | -6.7°C | 0.7°C | -17.0°C | 347 mm | 98% | 0.3 m/s | — |
| 1981 | -2.1°C | -4.6°C | -7.1°C | 0.6°C | -17.0°C | 378 mm | 99% | 0.3 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around -1.4°C with lows near -6.6°C (mean -4°C), based on 45 years of NASA POWER data.
December averages 305 mm of rainfall in Coquitlam, a relatively wet time of year. The wettest on record was 509 mm in 1998.
The hottest December reached 9.2°C in 2014. The coldest dipped to -29°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 3.2°C. Daytime highs moved from -3.2°C to -0.7°C and overnight lows from -9.3°C to -5.5°C over the same span.
December is one of the cooler months of the year in Coquitlam and a relatively wet time of year, so plan for around -1.4°C daytime highs and -6.6°C at night.
Yes — December is the coldest month of the year in Coquitlam, averaging -4°C.
For December in Coquitlam, pack warm layers and a jacket for chilly mornings, with typical highs of -1.4°C and lows of -6.6°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 97% — quite humid.
Average wind speed in December is 0.3 m/s. The windiest December on record averaged 0.5 m/s (2011).
The wettest December on record was 1998 with 509 mm. On average, December sees 305 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 Coquitlam 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.
