December is one of the cooler months of the year in Belleville, with average highs near 1.4°C and lows around -4°C (mean -1.3°C). It is about average for rainfall, averaging 64 mm of rainfall and 86% relative humidity across the period.
December is one of the cooler months of the year in Belleville. Across 45 years of records, the warmest December in Belleville was 2015 — when the month averaged 4.3°C — while the coldest was 1989 at -9.3°C. Typical December days reach 1.4°C with nights near -4°C. The long-term trend is warming, about 0.5°C per decade.
December is about average for rainfall in Belleville, averaging 64 mm of rainfall. The wettest December on record was 2018 with 129 mm, while the driest was 1997 at 25 mm.
Relative humidity in Belleville during December averages 86%. The most humid December was 1983 at 93%, and the least humid was 2021 at 81%.
December receives about 1.1 kWh/m²/day of solar energy in Belleville. The sunniest Decembers were 1995 and 2003 at 1.4 kWh/m²/day, and the cloudiest were 1984 and 2007 at 0.9.
Average wind speed in Belleville during December is 3.6 m/s. The windiest December was 1983 at 4.5 m/s, while the calmest was 1994 at 2.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -2.4°C | -1.3°C | -1.9°C | -0.7°C | 0.2°C | +2.6°C |
| Avg High | 0.4°C | 1.5°C | 0.9°C | 1.9°C | 2.7°C | +2.3°C |
| Avg Low | -5.2°C | -4.0°C | -4.7°C | -3.2°C | -2.2°C | +3°C |
| Avg Rain | 51 mm | 46 mm | 84 mm | 69 mm | 76 mm | +25 mm |
December temperatures in Belleville have risen by about 1.9°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -23°C (2004) to a record high of 14.7°C (1998).
Rainfall in December is about average for rainfall, averaging 64 mm, with a wettest year of 129 mm.
A quieter season to visit Belleville
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Belleville. That said, December — with days averaging 1.4°C and nights around -4°C (mean -1.3°C) and moderate rainfall (64 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 | 0.4°C | -3.0°C | -6.4°C | 6.8°C | -11.7°C | 80 mm | 83% | 4.2 m/s | — |
| 2024 | 2.3°C | -0.1°C | -2.5°C | 10.3°C | -14.5°C | 71 mm | 83% | 3.6 m/s | 1.1 |
| 2023 | 4.4°C | 2.5°C | 0.5°C | 8.7°C | -4.4°C | 82 mm | 85% | 2.9 m/s | 1 |
| 2022 | 2.2°C | 0.0°C | -2.2°C | 8.5°C | -10.0°C | 93 mm | 85% | 4 m/s | 1.1 |
| 2021 | 4.0°C | 1.5°C | -1.1°C | 13.1°C | -7.5°C | 56 mm | 81% | 3.7 m/s | 1.1 |
| 2020 | 2.8°C | 0.5°C | -1.8°C | 8.2°C | -8.8°C | 74 mm | 83% | 3.8 m/s | 1 |
| 2019 | 1.8°C | -0.9°C | -3.5°C | 7.8°C | -15.0°C | 66 mm | 86% | 3.5 m/s | 1.1 |
| 2018 🌧️ | 2.1°C | -0.5°C | -3.1°C | 7.2°C | -9.3°C | 129 mm | 85% | 3 m/s | 1.1 |
| 2017 | -1.4°C | -3.8°C | -6.2°C | 9.6°C | -21.8°C | 62 mm | 86% | 3.8 m/s | 1.2 |
| 2016 | 2.2°C | -0.2°C | -2.7°C | 9.7°C | -12.9°C | 66 mm | 82% | 4.4 m/s | 1.1 |
| 2015 🔥 | 6.7°C | 4.3°C | 1.9°C | 13.9°C | -5.0°C | 64 mm | 86% | 3.2 m/s | 1 |
| 2014 | 2.2°C | -0.1°C | -2.5°C | 8.7°C | -8.6°C | 32 mm | 82% | 3.4 m/s | 1.1 |
| 2013 | -0.7°C | -3.5°C | -6.3°C | 9.4°C | -19.4°C | 61 mm | 88% | 3.6 m/s | 1 |
| 2012 | 2.9°C | 0.3°C | -2.2°C | 13.0°C | -10.2°C | 74 mm | 87% | 3.4 m/s | 1 |
| 2011 | 3.6°C | 0.9°C | -1.9°C | 10.2°C | -12.5°C | 62 mm | 83% | 3.2 m/s | 1.1 |
| 2010 | -0.8°C | -3.2°C | -5.6°C | 11.7°C | -12.6°C | 70 mm | 89% | 3.8 m/s | 1.2 |
| 2009 | -0.1°C | -2.7°C | -5.3°C | 8.9°C | -15.9°C | 92 mm | 87% | 3.8 m/s | 1.3 |
| 2008 | 1.0°C | -2.3°C | -5.7°C | 9.7°C | -14.7°C | 110 mm | 86% | 4.2 m/s | 1.1 |
| 2007 | 0.0°C | -2.7°C | -5.5°C | 5.2°C | -13.8°C | 100 mm | 89% | 3.7 m/s | 0.9 |
| 2006 | 4.1°C | 1.7°C | -0.8°C | 9.6°C | -11.6°C | 114 mm | 87% | 3.9 m/s | 1.3 |
| 2005 | -0.4°C | -2.7°C | -4.9°C | 3.6°C | -12.2°C | 63 mm | 88% | 3.8 m/s | 1.1 |
| 2004 | 1.1°C | -2.6°C | -6.2°C | 8.1°C | -23.0°C | 127 mm | 89% | 3.9 m/s | 1 |
| 2003 | 1.2°C | -1.3°C | -3.9°C | 6.2°C | -9.4°C | 79 mm | 85% | 3.3 m/s | 1.4 |
| 2002 | 0.5°C | -2.3°C | -5.1°C | 5.4°C | -15.8°C | 40 mm | 86% | 3.6 m/s | 1.2 |
| 2001 | 3.3°C | 1.3°C | -0.7°C | 11.7°C | -5.5°C | 44 mm | 87% | 3.3 m/s | 1.2 |
| 2000 | -2.1°C | -5.5°C | -9.0°C | 6.9°C | -16.7°C | 73 mm | 89% | 3.9 m/s | 1.3 |
| 1999 | 2.6°C | -0.3°C | -3.1°C | 12.9°C | -13.0°C | 54 mm | 83% | 3.7 m/s | 1 |
| 1998 | 4.8°C | 1.9°C | -1.0°C | 14.7°C | -15.8°C | 48 mm | 83% | 4 m/s | 1.2 |
| 1997 | 1.8°C | -0.8°C | -3.4°C | 6.4°C | -14.6°C | 25 mm | 83% | 3.7 m/s | 1.2 |
| 1996 | 2.1°C | -0.2°C | -2.4°C | 8.4°C | -16.0°C | 47 mm | 87% | 3.1 m/s | 1 |
| 1995 | -2.4°C | -5.0°C | -7.5°C | 4.6°C | -13.6°C | 26 mm | 89% | 3.7 m/s | 1.4 |
| 1994 | 2.0°C | -0.8°C | -3.5°C | 8.2°C | -14.1°C | 32 mm | 86% | 2.7 m/s | 1.1 |
| 1993 | 0.3°C | -2.4°C | -5.2°C | 6.4°C | -19.2°C | 38 mm | 87% | 3.3 m/s | 1 |
| 1992 | 0.9°C | -1.6°C | -4.0°C | 6.1°C | -11.9°C | 55 mm | 86% | 3.5 m/s | 1 |
| 1991 | 1.0°C | -2.2°C | -5.3°C | 8.6°C | -14.9°C | 45 mm | 85% | 3.4 m/s | 1.1 |
| 1990 | 1.9°C | -1.2°C | -4.4°C | 6.5°C | -13.1°C | 87 mm | 85% | 3.5 m/s | 1.1 |
| 1989 ❄️ | -5.8°C | -9.3°C | -12.8°C | 3.1°C | -22.2°C | 31 mm | 89% | 3.3 m/s | 1.3 |
| 1988 | 0.7°C | -2.5°C | -5.8°C | 7.2°C | -15.6°C | 25 mm | 82% | 3.8 m/s | 1 |
| 1987 | 2.2°C | -0.3°C | -2.7°C | 7.7°C | -16.0°C | 34 mm | 84% | 3.5 m/s | 1.1 |
| 1986 | 1.5°C | -1.2°C | -3.9°C | 4.0°C | -15.3°C | 54 mm | 86% | 3.8 m/s | 1 |
| 1985 | -0.8°C | -3.1°C | -5.4°C | 7.9°C | -13.7°C | 38 mm | 86% | 4.4 m/s | 1 |
| 1984 | 3.3°C | 0.5°C | -2.2°C | 10.6°C | -10.6°C | 61 mm | 83% | 4 m/s | 0.9 |
| 1983 | -2.2°C | -5.1°C | -8.0°C | 4.5°C | -22.9°C | 121 mm | 93% | 4.5 m/s | — |
| 1982 | 4.1°C | 1.0°C | -2.1°C | 13.7°C | -13.8°C | 59 mm | 85% | 3.5 m/s | — |
| 1981 | 0.2°C | -2.0°C | -4.2°C | 6.1°C | -12.1°C | 34 mm | 86% | 3.3 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 -4°C (mean -1.3°C), based on 45 years of NASA POWER data.
December averages 64 mm of rainfall in Belleville, about average for rainfall. The wettest on record was 129 mm in 2018.
The hottest December reached 14.7°C in 1998. The coldest dipped to -23°C in 2004.
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 0.9°C to 2.7°C and overnight lows from -4.4°C to -2.3°C over the same span.
December is one of the cooler months of the year in Belleville and about average for rainfall, so plan for around 1.4°C daytime highs and -4°C at night.
Not quite — December is the 3rd coolest month in Belleville, averaging -1.3°C.
For December in Belleville, pack warm layers and a jacket for chilly mornings, with typical highs of 1.4°C and lows of -4°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 86% — quite humid.
Average wind speed in December is 3.6 m/s. The windiest December on record averaged 4.5 m/s (1983).
The wettest December on record was 2018 with 129 mm. On average, December sees 64 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 Belleville 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.
