December is one of the cooler months of the year in Terrace, with average highs near -4.9°C and lows around -11°C (mean -7.9°C). It is a relatively wet time of year, averaging 170 mm of rainfall and 97% relative humidity across the period.
December is one of the cooler months of the year in Terrace. Across 45 years of records, the warmest December in Terrace was 1991 — when the month averaged -2.6°C — while the coldest was 1983 at -16.7°C. Typical December days reach -4.9°C with nights near -11°C. The long-term trend is warming, about 0.2°C per decade.
December is a relatively wet time of year in Terrace, averaging 170 mm of rainfall. The wettest December on record was 1991 with 376 mm, while the driest was 2009 at 51 mm.
Relative humidity in Terrace during December averages 97%. The most humid December was 1981 at 99%, and the least humid was 1985 at 89%.
December receives about 0.4 kWh/m²/day of solar energy in Terrace. The sunniest Decembers were 2017, 2021 and 2022, among others at 0.5 kWh/m²/day, and the cloudiest were 2006, 2020 and 2023, among others at 0.3.
Average wind speed in Terrace during December is 0.8 m/s. The windiest Decembers were 1992 and 1996 at 1.1 m/s, while the calmest were 2005, 2019 and 2024, among others at 0.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -8.7°C | -7.6°C | -7.7°C | -7.9°C | -7.9°C | +0.8°C |
| Avg High | -5.5°C | -4.5°C | -4.7°C | -5.0°C | -4.9°C | +0.6°C |
| Avg Low | -11.9°C | -10.7°C | -10.7°C | -10.9°C | -10.7°C | +1.2°C |
| Avg Rain | 150 mm | 222 mm | 167 mm | 145 mm | 157 mm | +7 mm |
December temperatures in Terrace have risen by about 2.3°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -39.2°C (1996) to a record high of 3.5°C (2004).
Rainfall in December is a relatively wet time of year, averaging 170 mm, with a wettest year of 376 mm.
A quieter season to visit Terrace
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Terrace. That said, December — with days averaging -4.9°C and nights around -11°C (mean -7.9°C) and higher rainfall (170 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 | -4.4°C | -7.1°C | -9.7°C | 0.8°C | -26.5°C | 239 mm | 99% | 0.9 m/s | — |
| 2024 | -2.0°C | -4.0°C | -6.0°C | 1.5°C | -20.7°C | 128 mm | 98% | 0.7 m/s | 0.4 |
| 2023 | -1.4°C | -3.8°C | -6.1°C | 1.1°C | -12.5°C | 207 mm | 98% | 0.8 m/s | 0.3 |
| 2022 | -8.7°C | -12.7°C | -16.6°C | 0.4°C | -36.4°C | 85 mm | 97% | 0.8 m/s | 0.5 |
| 2021 | -10.9°C | -15.0°C | -19.1°C | 0.1°C | -36.0°C | 86 mm | 97% | 0.8 m/s | 0.5 |
| 2020 | -2.3°C | -4.6°C | -6.8°C | 0.5°C | -14.8°C | 197 mm | 98% | 0.8 m/s | 0.3 |
| 2019 | -2.8°C | -5.3°C | -7.8°C | 0.5°C | -18.1°C | 143 mm | 98% | 0.7 m/s | 0.4 |
| 2018 | -3.1°C | -5.9°C | -8.6°C | 0.4°C | -16.8°C | 168 mm | 97% | 0.9 m/s | 0.4 |
| 2017 | -5.9°C | -8.9°C | -11.9°C | 1.8°C | -29.4°C | 60 mm | 93% | 0.8 m/s | 0.5 |
| 2016 | -9.3°C | -13.5°C | -17.7°C | 0.2°C | -30.1°C | 123 mm | 95% | 0.9 m/s | 0.5 |
| 2015 | -5.4°C | -8.1°C | -10.9°C | 0.8°C | -23.7°C | 123 mm | 96% | 0.8 m/s | 0.4 |
| 2014 | -3.2°C | -5.9°C | -8.6°C | 1.1°C | -25.2°C | 160 mm | 96% | 0.8 m/s | 0.4 |
| 2013 | -3.8°C | -6.5°C | -9.3°C | 0.3°C | -28.4°C | 231 mm | 96% | 0.8 m/s | 0.4 |
| 2012 | -6.6°C | -9.6°C | -12.5°C | 0.2°C | -23.3°C | 123 mm | 99% | 0.8 m/s | 0.4 |
| 2011 | -3.2°C | -6.1°C | -9.1°C | 0.2°C | -14.6°C | 189 mm | 99% | 0.8 m/s | 0.4 |
| 2010 | -6.3°C | -9.5°C | -12.7°C | 0.2°C | -26.3°C | 127 mm | 98% | 0.8 m/s | 0.4 |
| 2009 | -9.2°C | -13.3°C | -17.5°C | 0.3°C | -33.8°C | 51 mm | 95% | 0.9 m/s | 0.5 |
| 2008 | -9.3°C | -13.0°C | -16.7°C | 0.5°C | -31.9°C | 143 mm | 96% | 0.9 m/s | 0.5 |
| 2007 | -6.8°C | -9.6°C | -12.5°C | 0.1°C | -26.7°C | 177 mm | 97% | 0.9 m/s | 0.4 |
| 2006 | -1.4°C | -4.1°C | -6.8°C | 0.9°C | -15.6°C | 297 mm | 99% | 1 m/s | 0.3 |
| 2005 | -2.1°C | -4.5°C | -6.8°C | 2.1°C | -17.7°C | 158 mm | 97% | 0.7 m/s | 0.4 |
| 2004 | -3.7°C | -6.2°C | -8.8°C | 3.5°C | -23.7°C | 205 mm | 97% | 0.9 m/s | 0.4 |
| 2003 | -3.5°C | -6.3°C | -9.1°C | 0.6°C | -19.8°C | 160 mm | 98% | 0.9 m/s | 0.4 |
| 2002 | -1.3°C | -3.7°C | -6.1°C | 3.3°C | -12.9°C | 156 mm | 97% | 0.8 m/s | 0.4 |
| 2001 | -4.8°C | -7.9°C | -10.9°C | 0.4°C | -20.2°C | 171 mm | 98% | 0.8 m/s | 0.4 |
| 2000 | -5.0°C | -8.2°C | -11.4°C | 1.5°C | -24.7°C | 150 mm | 96% | 0.8 m/s | 0.4 |
| 1999 | -1.4°C | -3.7°C | -5.9°C | 2.3°C | -15.2°C | 202 mm | 97% | 0.8 m/s | 0.4 |
| 1998 | -4.3°C | -7.3°C | -10.3°C | 0.3°C | -28.0°C | 273 mm | 97% | 0.9 m/s | 0.3 |
| 1997 | -1.1°C | -3.7°C | -6.3°C | 0.4°C | -14.6°C | 269 mm | 99% | 0.8 m/s | 0.4 |
| 1996 | -10.7°C | -14.4°C | -18.0°C | -0.2°C | -39.2°C | 133 mm | 97% | 1.1 m/s | 0.4 |
| 1995 | -6.1°C | -9.5°C | -12.8°C | 0.3°C | -35.4°C | 174 mm | 97% | 0.9 m/s | 0.4 |
| 1994 | -4.9°C | -8.2°C | -11.5°C | 0.3°C | -31.7°C | 181 mm | 96% | 0.8 m/s | 0.4 |
| 1993 | -1.5°C | -4.5°C | -7.4°C | 0.4°C | -19.5°C | 153 mm | 98% | 0.8 m/s | 0.4 |
| 1992 | -8.0°C | -12.0°C | -16.0°C | 0.3°C | -34.8°C | 179 mm | 96% | 1.1 m/s | 0.5 |
| 1991 🔥 🌧️ | -0.7°C | -2.6°C | -4.5°C | 1.8°C | -15.6°C | 376 mm | 99% | 0.9 m/s | 0.3 |
| 1990 | -6.4°C | -10.4°C | -14.4°C | 0.3°C | -35.3°C | 281 mm | 97% | 0.9 m/s | 0.4 |
| 1989 | -1.0°C | -2.9°C | -4.7°C | 1.7°C | -21.2°C | 282 mm | 99% | 0.7 m/s | 0.3 |
| 1988 | -5.5°C | -9.0°C | -12.5°C | 0.6°C | -25.3°C | 157 mm | 93% | 0.7 m/s | 0.4 |
| 1987 | -4.2°C | -6.9°C | -9.6°C | 0.4°C | -23.7°C | 145 mm | 96% | 0.8 m/s | 0.4 |
| 1986 | -3.2°C | -6.1°C | -9.1°C | 0.3°C | -19.5°C | 172 mm | 96% | 0.8 m/s | 0.4 |
| 1985 | -3.3°C | -5.8°C | -8.4°C | 2.4°C | -29.6°C | 109 mm | 89% | 0.7 m/s | 0.4 |
| 1984 | -9.2°C | -13.2°C | -17.2°C | 0.3°C | -39.0°C | 177 mm | 95% | 0.9 m/s | 0.5 |
| 1983 ❄️ | -11.8°C | -16.7°C | -21.5°C | 0.2°C | -33.2°C | 57 mm | 97% | 0.9 m/s | — |
| 1982 | -4.8°C | -8.1°C | -11.4°C | 0.3°C | -15.4°C | 118 mm | 95% | 0.8 m/s | — |
| 1981 | -6.9°C | -10.0°C | -13.1°C | 0.0°C | -27.5°C | 131 mm | 99% | 0.9 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around -4.9°C with lows near -11°C (mean -7.9°C), based on 45 years of NASA POWER data.
December averages 170 mm of rainfall in Terrace, a relatively wet time of year. The wettest on record was 376 mm in 1991.
The hottest December reached 3.5°C in 2004. The coldest dipped to -39.2°C in 1996.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 2.3°C. Daytime highs moved from -7.2°C to -5.5°C and overnight lows from -14.3°C to -11.5°C over the same span.
December is one of the cooler months of the year in Terrace and a relatively wet time of year, so plan for around -4.9°C daytime highs and -11°C at night.
Yes — December is the coldest month of the year in Terrace, averaging -7.9°C.
For December in Terrace, pack warm layers and a jacket for chilly mornings, with typical highs of -4.9°C and lows of -11°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 97% — quite humid.
Average wind speed in December is 0.8 m/s. The windiest December on record averaged 1.1 m/s (1992).
The wettest December on record was 1991 with 376 mm. On average, December sees 170 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 Terrace 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.
