December is one of the cooler months of the year in North Bay, with average highs near -4.1°C and lows around -11.5°C (mean -7.8°C). It is one of the drier months, averaging 61 mm of rainfall and 93% relative humidity across the period.
December is one of the cooler months of the year in North Bay. Across 45 years of records, the warmest December in North Bay was 2015 — when the month averaged -0.8°C — while the coldest was 1989 at -18.7°C. Typical December days reach -4.1°C with nights near -11.5°C. The long-term trend is warming, about 0.6°C per decade.
December is one of the drier months in North Bay, averaging 61 mm of rainfall. The wettest December on record was 1982 with 129 mm, while the driest was 2023 at 21 mm.
Relative humidity in North Bay during December averages 93%. The most humid Decembers were 1989 and 1995 at 100%, and the least humid was 2021 at 84%.
December receives about 0.9 kWh/m²/day of solar energy in North Bay. The sunniest Decembers were 1989 and 1995 at 1.2 kWh/m²/day, and the cloudiest was 1984 at 0.7.
Average wind speed in North Bay during December is 1 m/s. The windiest Decembers were 2016, 2021 and 2025, among others at 1.1 m/s, while the calmest were 2018, 2023 and 2024, among others at 0.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -9.7°C | -7.1°C | -8.4°C | -7.3°C | -6.0°C | +3.7°C |
| Avg High | -5.7°C | -3.4°C | -4.7°C | -4.0°C | -2.5°C | +3.2°C |
| Avg Low | -13.8°C | -10.8°C | -12.2°C | -10.7°C | -9.5°C | +4.3°C |
| Avg Rain | 70 mm | 58 mm | 75 mm | 43 mm | 58 mm | -12 mm |
December temperatures in North Bay have risen by about 3.1°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -38°C (2004) to a record high of 14.4°C (1982).
Rainfall in December is one of the drier months, averaging 61 mm, with a wettest year of 129 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.5°C per decade while lows rose 0.8°C per decade, narrowing the gap between day and night.
A quieter season to visit North Bay
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting North Bay. That said, December — with days averaging -4.1°C and nights around -11.5°C (mean -7.8°C) and moderate rainfall (61 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 | -5.3°C | -10.1°C | -14.8°C | 4.9°C | -22.4°C | 79 mm | 91% | 1.1 m/s | — |
| 2024 | -3.1°C | -6.3°C | -9.5°C | 1.9°C | -21.5°C | 109 mm | 91% | 0.9 m/s | 1 |
| 2023 | 0.4°C | -2.5°C | -5.5°C | 6.7°C | -12.5°C | 21 mm | 84% | 0.9 m/s | 1 |
| 2022 | -1.9°C | -5.0°C | -8.1°C | 5.5°C | -18.6°C | 38 mm | 88% | 1 m/s | 1 |
| 2021 | -1.6°C | -5.6°C | -9.5°C | 11.9°C | -16.4°C | 56 mm | 84% | 1.1 m/s | 0.9 |
| 2020 | -3.3°C | -6.5°C | -9.8°C | 2.5°C | -23.1°C | 46 mm | 91% | 1 m/s | 0.9 |
| 2019 | -3.3°C | -7.0°C | -10.7°C | 2.0°C | -23.4°C | 30 mm | 93% | 1 m/s | 0.9 |
| 2018 | -4.6°C | -8.6°C | -12.6°C | 2.1°C | -22.5°C | 45 mm | 97% | 0.9 m/s | 0.9 |
| 2017 | -7.4°C | -10.3°C | -13.3°C | 7.9°C | -27.5°C | 29 mm | 86% | 1 m/s | 1.1 |
| 2016 | -2.8°C | -6.1°C | -9.3°C | 4.2°C | -24.3°C | 36 mm | 87% | 1.1 m/s | 0.9 |
| 2015 🔥 | 2.1°C | -0.8°C | -3.7°C | 11.9°C | -15.9°C | 60 mm | 88% | 1 m/s | 0.8 |
| 2014 | -3.4°C | -7.1°C | -10.8°C | 2.6°C | -22.9°C | 37 mm | 89% | 0.9 m/s | 1 |
| 2013 | -8.7°C | -12.1°C | -15.4°C | 4.4°C | -28.2°C | 47 mm | 92% | 0.9 m/s | 1 |
| 2012 | -3.7°C | -7.1°C | -10.5°C | 7.7°C | -18.8°C | 48 mm | 92% | 1 m/s | 0.9 |
| 2011 | -1.9°C | -5.7°C | -9.5°C | 6.0°C | -24.7°C | 45 mm | 86% | 1 m/s | 0.9 |
| 2010 | -6.1°C | -8.4°C | -10.8°C | 4.1°C | -17.4°C | 51 mm | 95% | 1.1 m/s | 0.9 |
| 2009 | -4.8°C | -8.2°C | -11.6°C | 4.5°C | -21.5°C | 50 mm | 95% | 1 m/s | 1 |
| 2008 | -5.6°C | -10.0°C | -14.5°C | 9.7°C | -25.5°C | 101 mm | 97% | 1.1 m/s | 1 |
| 2007 | -5.7°C | -9.6°C | -13.6°C | 0.5°C | -25.4°C | 88 mm | 99% | 1 m/s | 0.9 |
| 2006 | -0.8°C | -3.6°C | -6.4°C | 5.3°C | -19.3°C | 81 mm | 94% | 0.9 m/s | 0.9 |
| 2005 | -5.1°C | -8.6°C | -12.1°C | 0.1°C | -22.3°C | 51 mm | 95% | 1 m/s | 1 |
| 2004 | -7.1°C | -11.7°C | -16.4°C | 1.5°C | -38.0°C | 96 mm | 97% | 1.1 m/s | 1 |
| 2003 | -3.7°C | -7.5°C | -11.3°C | 1.3°C | -25.5°C | 71 mm | 97% | 0.9 m/s | 1 |
| 2002 | -3.9°C | -7.9°C | -11.8°C | 1.1°C | -24.7°C | 62 mm | 98% | 1 m/s | 1 |
| 2001 | -0.4°C | -3.1°C | -5.9°C | 11.8°C | -18.3°C | 78 mm | 94% | 0.9 m/s | 1 |
| 2000 | -9.9°C | -14.0°C | -18.1°C | 0.4°C | -28.4°C | 74 mm | 100% | 1 m/s | 1 |
| 1999 | -2.3°C | -6.2°C | -10.1°C | 4.6°C | -24.4°C | 97 mm | 93% | 1 m/s | 0.9 |
| 1998 | -0.8°C | -4.9°C | -8.9°C | 8.6°C | -27.9°C | 63 mm | 90% | 1 m/s | 0.9 |
| 1997 | -3.1°C | -6.9°C | -10.6°C | 2.2°C | -25.1°C | 25 mm | 92% | 0.9 m/s | 1.1 |
| 1996 | -3.0°C | -6.2°C | -9.5°C | 5.3°C | -26.7°C | 96 mm | 97% | 0.9 m/s | 0.9 |
| 1995 | -8.8°C | -12.2°C | -15.6°C | 0.2°C | -24.4°C | 51 mm | 100% | 0.9 m/s | 1.2 |
| 1994 | -1.1°C | -4.4°C | -7.8°C | 4.9°C | -20.0°C | 30 mm | 92% | 0.9 m/s | 0.8 |
| 1993 | -4.0°C | -8.1°C | -12.2°C | 2.9°C | -33.9°C | 40 mm | 95% | 1 m/s | 0.8 |
| 1992 | -2.7°C | -6.4°C | -10.0°C | 4.4°C | -19.7°C | 49 mm | 92% | 1 m/s | 0.8 |
| 1991 | -4.5°C | -8.2°C | -11.9°C | 6.8°C | -21.8°C | 70 mm | 92% | 1 m/s | 0.9 |
| 1990 | -3.3°C | -7.6°C | -11.9°C | 3.7°C | -23.2°C | 55 mm | 93% | 1.1 m/s | 0.8 |
| 1989 ❄️ | -13.9°C | -18.7°C | -23.5°C | -1.0°C | -33.1°C | 54 mm | 100% | 0.9 m/s | 1.2 |
| 1988 | -4.9°C | -9.2°C | -13.5°C | 4.4°C | -23.2°C | 59 mm | 90% | 1 m/s | 0.8 |
| 1987 | -3.2°C | -6.5°C | -9.8°C | 3.4°C | -25.7°C | 65 mm | 97% | 0.9 m/s | 1 |
| 1986 | -3.8°C | -8.0°C | -12.3°C | 1.0°C | -27.2°C | 57 mm | 98% | 1 m/s | 0.9 |
| 1985 | -7.7°C | -12.3°C | -16.9°C | 1.5°C | -31.7°C | 63 mm | 99% | 0.9 m/s | 1 |
| 1984 | -3.3°C | -7.4°C | -11.6°C | 7.9°C | -22.6°C | 93 mm | 93% | 1 m/s | 0.7 |
| 1983 | -8.6°C | -13.1°C | -17.6°C | 0.3°C | -32.0°C | 68 mm | 99% | 1.1 m/s | — |
| 1982 🌧️ | -0.7°C | -4.7°C | -8.7°C | 14.4°C | -21.6°C | 129 mm | 91% | 1 m/s | — |
| 1981 | -4.8°C | -7.7°C | -10.6°C | 1.9°C | -19.6°C | 39 mm | 97% | 0.9 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around -4.1°C with lows near -11.5°C (mean -7.8°C), based on 45 years of NASA POWER data.
December averages 61 mm of rainfall in North Bay, one of the drier months. The wettest on record was 129 mm in 1982.
The hottest December reached 14.4°C in 1982. The coldest dipped to -38°C in 2004.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 3.1°C. Daytime highs moved from -5°C to -2.3°C and overnight lows from -13.1°C to -9.5°C over the same span.
December is one of the cooler months of the year in North Bay and one of the drier months, so plan for around -4.1°C daytime highs and -11.5°C at night.
Not quite — December is the 3rd coolest month in North Bay, averaging -7.8°C.
For December in North Bay, pack warm layers and a jacket for chilly mornings, with typical highs of -4.1°C and lows of -11.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 93% — quite humid.
Average wind speed in December is 1 m/s. The windiest December on record averaged 1.1 m/s (1983).
The wettest December on record was 1982 with 129 mm. On average, December sees 61 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 North Bay 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.
