December is one of the cooler months of the year in Edmundston, with average highs near -5.9°C and lows around -14.4°C (mean -10.1°C). It is about average for rainfall, averaging 86 mm of rainfall and 96% relative humidity across the period.
December is one of the cooler months of the year in Edmundston. Across 45 years of records, the warmest December in Edmundston was 2001 — when the month averaged -5.2°C — while the coldest was 1989 at -18.7°C. Typical December days reach -5.9°C with nights near -14.4°C. The long-term trend is warming, about 0.8°C per decade.
December is about average for rainfall in Edmundston, averaging 86 mm of rainfall. The wettest December on record was 2005 with 156 mm, while the driest was 2001 at 41 mm.
Relative humidity in Edmundston during December averages 96%. The most humid December was 1981 at 100%, and the least humid was 2001 at 90%.
December receives about 0.9 kWh/m²/day of solar energy in Edmundston. The sunniest December was 1989 at 1.2 kWh/m²/day, and the cloudiest was 2015 at 0.7.
Average wind speed in Edmundston during December is 0.5 m/s. The windiest Decembers were 2020, 2021 and 2025, among others at 0.6 m/s, while the calmest were 2013 and 2015 at 0.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -12.3°C | -10.2°C | -10.0°C | -9.8°C | -7.6°C | +4.7°C |
| Avg High | -7.6°C | -5.8°C | -5.8°C | -5.8°C | -3.6°C | +4°C |
| Avg Low | -16.9°C | -14.7°C | -14.2°C | -13.7°C | -11.6°C | +5.3°C |
| Avg Rain | 73 mm | 79 mm | 92 mm | 97 mm | 91 mm | +18 mm |
December temperatures in Edmundston have risen by about 3.2°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -40.4°C (1993) to a record high of 12.7°C (2020).
Rainfall in December is about average for rainfall, averaging 86 mm, with a wettest year of 156 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.6°C per decade while lows rose 1°C per decade, narrowing the gap between day and night.
A quieter season to visit Edmundston
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Edmundston. That said, December — with days averaging -5.9°C and nights around -14.4°C (mean -10.1°C) and higher rainfall (86 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 | -7.3°C | -11.4°C | -15.5°C | 8.8°C | -22.2°C | 70 mm | 94% | 0.6 m/s | — |
| 2024 | -3.1°C | -7.0°C | -10.8°C | 9.5°C | -18.7°C | 94 mm | 92% | 0.5 m/s | 1 |
| 2023 | -2.0°C | -6.0°C | -10.1°C | 12.0°C | -16.7°C | 93 mm | 95% | 0.5 m/s | 1 |
| 2022 | -3.4°C | -7.3°C | -11.2°C | 1.9°C | -23.8°C | 109 mm | 99% | 0.5 m/s | 0.9 |
| 2021 | -4.3°C | -8.4°C | -12.5°C | 4.3°C | -21.0°C | 83 mm | 91% | 0.6 m/s | 1 |
| 2020 | -1.5°C | -5.7°C | -9.8°C | 12.7°C | -25.4°C | 99 mm | 94% | 0.6 m/s | 0.9 |
| 2019 | -5.2°C | -9.6°C | -14.0°C | 3.0°C | -21.3°C | 63 mm | 95% | 0.5 m/s | 1.1 |
| 2018 | -7.3°C | -11.6°C | -15.8°C | 3.5°C | -23.7°C | 89 mm | 96% | 0.5 m/s | 1 |
| 2017 | -9.5°C | -13.9°C | -18.3°C | 0.9°C | -27.5°C | 94 mm | 98% | 0.6 m/s | 1 |
| 2016 | -7.6°C | -12.3°C | -17.0°C | 0.1°C | -31.6°C | 98 mm | 100% | 0.5 m/s | 0.9 |
| 2015 | -2.2°C | -5.5°C | -8.8°C | 4.0°C | -22.7°C | 111 mm | 97% | 0.4 m/s | 0.7 |
| 2014 | -4.3°C | -7.9°C | -11.4°C | 1.6°C | -21.5°C | 114 mm | 94% | 0.5 m/s | 0.9 |
| 2013 | -10.0°C | -14.1°C | -18.2°C | 0.1°C | -27.2°C | 78 mm | 99% | 0.4 m/s | 0.9 |
| 2012 | -4.7°C | -8.4°C | -12.2°C | 3.7°C | -21.7°C | 94 mm | 96% | 0.5 m/s | 0.9 |
| 2011 | -4.2°C | -8.5°C | -12.9°C | 2.7°C | -27.5°C | 85 mm | 96% | 0.5 m/s | 0.9 |
| 2010 | -2.7°C | -5.8°C | -8.9°C | 9.3°C | -17.6°C | 148 mm | 96% | 0.6 m/s | 0.8 |
| 2009 | -6.2°C | -9.9°C | -13.5°C | 0.1°C | -24.7°C | 106 mm | 99% | 0.5 m/s | 0.9 |
| 2008 | -6.9°C | -12.0°C | -17.1°C | 0.2°C | -29.4°C | 115 mm | 99% | 0.5 m/s | 0.9 |
| 2007 | -7.9°C | -12.5°C | -17.1°C | 0.1°C | -24.3°C | 78 mm | 99% | 0.5 m/s | 1 |
| 2006 | -3.3°C | -7.4°C | -11.6°C | 1.3°C | -22.4°C | 58 mm | 95% | 0.5 m/s | 0.9 |
| 2005 🌧️ | -5.7°C | -9.1°C | -12.5°C | 4.2°C | -22.3°C | 156 mm | 94% | 0.5 m/s | 1 |
| 2004 | -7.9°C | -13.5°C | -19.1°C | 0.3°C | -27.3°C | 109 mm | 100% | 0.5 m/s | 1 |
| 2003 | -3.6°C | -7.5°C | -11.4°C | 3.6°C | -18.9°C | 104 mm | 92% | 0.6 m/s | 0.9 |
| 2002 | -6.8°C | -11.0°C | -15.1°C | 0.1°C | -25.7°C | 56 mm | 99% | 0.5 m/s | 1 |
| 2001 🔥 | -1.9°C | -5.2°C | -8.5°C | 6.1°C | -16.1°C | 41 mm | 90% | 0.5 m/s | 1 |
| 2000 | -7.7°C | -12.0°C | -16.4°C | 9.3°C | -26.0°C | 96 mm | 96% | 0.6 m/s | 1 |
| 1999 | -5.3°C | -9.4°C | -13.4°C | 3.5°C | -32.7°C | 71 mm | 97% | 0.5 m/s | 0.9 |
| 1998 | -4.2°C | -8.6°C | -13.1°C | 3.8°C | -29.2°C | 53 mm | 92% | 0.6 m/s | 1 |
| 1997 | -7.3°C | -12.1°C | -16.9°C | -0.4°C | -27.2°C | 76 mm | 99% | 0.5 m/s | 0.9 |
| 1996 | -2.2°C | -6.1°C | -10.1°C | 7.2°C | -28.1°C | 102 mm | 96% | 0.5 m/s | 0.9 |
| 1995 | -8.4°C | -12.6°C | -16.8°C | 0.1°C | -26.2°C | 56 mm | 99% | 0.5 m/s | 1.1 |
| 1994 | -6.0°C | -10.4°C | -14.7°C | 1.6°C | -27.6°C | 71 mm | 99% | 0.5 m/s | 0.8 |
| 1993 | -5.9°C | -10.3°C | -14.7°C | 4.1°C | -40.4°C | 123 mm | 97% | 0.5 m/s | 0.9 |
| 1992 | -5.1°C | -9.1°C | -13.0°C | 2.8°C | -25.1°C | 54 mm | 95% | 0.5 m/s | 0.9 |
| 1991 | -8.3°C | -13.1°C | -18.0°C | 5.9°C | -30.4°C | 61 mm | 96% | 0.5 m/s | 1 |
| 1990 | -5.5°C | -10.8°C | -16.1°C | 0.2°C | -30.1°C | 119 mm | 99% | 0.5 m/s | 0.9 |
| 1989 ❄️ | -14.0°C | -18.7°C | -23.3°C | -1.3°C | -36.1°C | 52 mm | 99% | 0.5 m/s | 1.2 |
| 1988 | -7.5°C | -12.1°C | -16.6°C | 1.8°C | -28.2°C | 42 mm | 94% | 0.6 m/s | 0.9 |
| 1987 | -6.7°C | -10.9°C | -15.1°C | 2.5°C | -27.1°C | 76 mm | 97% | 0.5 m/s | 0.9 |
| 1986 | -7.2°C | -12.5°C | -17.7°C | 0.1°C | -33.0°C | 66 mm | 100% | 0.5 m/s | 0.9 |
| 1985 | -8.6°C | -13.4°C | -18.2°C | 1.2°C | -29.8°C | 50 mm | 94% | 0.5 m/s | 1 |
| 1984 | -5.4°C | -11.0°C | -16.7°C | 2.0°C | -33.5°C | 68 mm | 96% | 0.5 m/s | 0.8 |
| 1983 | -9.2°C | -13.8°C | -18.5°C | 0.1°C | -30.4°C | 140 mm | 100% | 0.5 m/s | — |
| 1982 | -4.8°C | -9.0°C | -13.2°C | 6.0°C | -27.7°C | 82 mm | 90% | 0.5 m/s | — |
| 1981 | -5.2°C | -8.9°C | -12.7°C | 0.1°C | -26.3°C | 81 mm | 100% | 0.5 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around -5.9°C with lows near -14.4°C (mean -10.1°C), based on 45 years of NASA POWER data.
December averages 86 mm of rainfall in Edmundston, about average for rainfall. The wettest on record was 156 mm in 2005.
The hottest December reached 12.7°C in 2020. The coldest dipped to -40.4°C in 1993.
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 -6.6°C to -4°C and overnight lows from -15.9°C to -12°C over the same span.
December is one of the cooler months of the year in Edmundston and about average for rainfall, so plan for around -5.9°C daytime highs and -14.4°C at night.
Not quite — December is the 3rd coolest month in Edmundston, averaging -10.1°C.
For December in Edmundston, pack warm layers and a jacket for chilly mornings, with typical highs of -5.9°C and lows of -14.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 96% — quite humid.
Average wind speed in December is 0.5 m/s. The windiest December on record averaged 0.6 m/s (1988).
The wettest December on record was 2005 with 156 mm. On average, December sees 86 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 Edmundston 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.
