December is one of the cooler months of the year in New Glasgow, with average highs near 1°C and lows around -5.7°C (mean -2.3°C). It is a relatively wet time of year, averaging 84 mm of rainfall and 87% relative humidity across the period.
December is one of the cooler months of the year in New Glasgow. Across 45 years of records, the warmest December in New Glasgow was 2010 — when the month averaged 1.2°C — while the coldest was 1989 at -9.9°C. Typical December days reach 1°C with nights near -5.7°C. The long-term trend is warming, about 0.4°C per decade.
December is a relatively wet time of year in New Glasgow, averaging 84 mm of rainfall. The wettest December on record was 2010 with 167 mm, while the driest was 1989 at 12 mm.
Relative humidity in New Glasgow during December averages 87%. The most humid Decembers were 2013 and 2015 at 93%, and the least humid was 1988 at 81%.
December receives about 1.1 kWh/m²/day of solar energy in New Glasgow. The sunniest Decembers were 1989 and 1995 at 1.3 kWh/m²/day, and the cloudiest was 1993 at 0.8.
Average wind speed in New Glasgow during December is 0.5 m/s. The windiest Decembers were 2007, 2010 and 2025, among others at 0.6 m/s, while the calmest were 2020, 2021 and 2022, among others at 0.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -3.7°C | -2.1°C | -2.6°C | -2.0°C | -1.0°C | +2.7°C |
| Avg High | -0.1°C | 1.4°C | 0.7°C | 1.3°C | 2.4°C | +2.5°C |
| Avg Low | -7.3°C | -5.5°C | -5.9°C | -5.3°C | -4.3°C | +3°C |
| Avg Rain | 61 mm | 66 mm | 100 mm | 108 mm | 78 mm | +17 mm |
December temperatures in New Glasgow have risen by about 1.2°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -21.7°C (1989) to a record high of 15°C (2008).
Rainfall in December is a relatively wet time of year, averaging 84 mm, with a wettest year of 167 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.3°C per decade while lows rose 0.5°C per decade, narrowing the gap between day and night.
A quieter season to visit New Glasgow
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting New Glasgow. That said, December — with days averaging 1°C and nights around -5.7°C (mean -2.3°C) and higher rainfall (84 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 | -0.2°C | -3.7°C | -7.2°C | 12.9°C | -14.0°C | 73 mm | 84% | 0.6 m/s | — |
| 2024 | 1.7°C | -1.7°C | -5.1°C | 14.4°C | -12.6°C | 57 mm | 89% | 0.5 m/s | 1.1 |
| 2023 | 2.9°C | -0.1°C | -3.2°C | 13.4°C | -8.5°C | 105 mm | 91% | 0.5 m/s | 1.1 |
| 2022 | 3.0°C | 0.1°C | -2.8°C | 12.8°C | -8.3°C | 82 mm | 87% | 0.4 m/s | 1 |
| 2021 | 2.5°C | -1.1°C | -4.8°C | 14.0°C | -13.2°C | 66 mm | 82% | 0.4 m/s | 1.1 |
| 2020 | 4.2°C | 0.6°C | -2.9°C | 14.4°C | -10.7°C | 87 mm | 90% | 0.4 m/s | 1 |
| 2019 | 1.1°C | -2.3°C | -5.7°C | 13.1°C | -11.6°C | 62 mm | 85% | 0.4 m/s | 1.1 |
| 2018 | -1.6°C | -4.9°C | -8.2°C | 10.9°C | -14.0°C | 94 mm | 90% | 0.4 m/s | 1.1 |
| 2017 | -0.5°C | -3.8°C | -7.2°C | 13.4°C | -17.4°C | 103 mm | 85% | 0.4 m/s | 1.1 |
| 2016 | -0.2°C | -3.8°C | -7.5°C | 11.4°C | -21.6°C | 95 mm | 91% | 0.4 m/s | 1 |
| 2015 | 2.8°C | -0.1°C | -2.9°C | 10.1°C | -10.7°C | 121 mm | 93% | 0.5 m/s | 1 |
| 2014 | 3.4°C | 0.0°C | -3.4°C | 12.7°C | -14.3°C | 123 mm | 87% | 0.5 m/s | 1 |
| 2013 | -2.0°C | -5.5°C | -8.9°C | 9.2°C | -18.6°C | 129 mm | 93% | 0.5 m/s | 0.9 |
| 2012 | 2.5°C | -0.7°C | -4.0°C | 12.0°C | -10.0°C | 93 mm | 91% | 0.5 m/s | 1 |
| 2011 | 3.7°C | 0.0°C | -3.6°C | 14.8°C | -10.6°C | 87 mm | 87% | 0.5 m/s | 1 |
| 2010 🔥 🌧️ | 3.6°C | 1.2°C | -1.2°C | 11.7°C | -7.0°C | 167 mm | 92% | 0.6 m/s | 1 |
| 2009 | 0.3°C | -2.4°C | -5.2°C | 12.1°C | -12.8°C | 111 mm | 91% | 0.5 m/s | 1 |
| 2008 | 2.6°C | -1.5°C | -5.6°C | 15.0°C | -14.0°C | 165 mm | 87% | 0.5 m/s | 1 |
| 2007 | -1.5°C | -4.8°C | -8.1°C | 8.2°C | -16.6°C | 102 mm | 91% | 0.6 m/s | 1 |
| 2006 | 1.2°C | -2.1°C | -5.5°C | 10.8°C | -13.4°C | 100 mm | 87% | 0.4 m/s | 1.1 |
| 2005 | 1.3°C | -1.9°C | -5.0°C | 11.1°C | -10.8°C | 97 mm | 89% | 0.5 m/s | 1 |
| 2004 | 0.6°C | -3.2°C | -7.1°C | 11.4°C | -20.8°C | 103 mm | 87% | 0.5 m/s | 1 |
| 2003 | 1.7°C | -1.3°C | -4.2°C | 11.3°C | -11.0°C | 79 mm | 87% | 0.5 m/s | 1.1 |
| 2002 | 0.0°C | -3.2°C | -6.4°C | 9.4°C | -15.9°C | 79 mm | 88% | 0.5 m/s | 1.1 |
| 2001 | 1.9°C | -1.0°C | -3.8°C | 13.8°C | -9.8°C | 50 mm | 90% | 0.5 m/s | 1.1 |
| 2000 | -0.7°C | -4.4°C | -8.0°C | 12.2°C | -16.7°C | 119 mm | 88% | 0.6 m/s | 1.2 |
| 1999 | 2.4°C | -1.0°C | -4.5°C | 12.3°C | -14.2°C | 116 mm | 87% | 0.5 m/s | 0.9 |
| 1998 | 1.4°C | -2.1°C | -5.6°C | 11.2°C | -15.6°C | 56 mm | 84% | 0.5 m/s | 1.1 |
| 1997 | -0.1°C | -3.2°C | -6.3°C | 8.6°C | -15.4°C | 76 mm | 90% | 0.5 m/s | 1.2 |
| 1996 | 3.9°C | 0.3°C | -3.4°C | 12.5°C | -17.8°C | 83 mm | 87% | 0.5 m/s | 1 |
| 1995 | -0.8°C | -3.5°C | -6.1°C | 7.8°C | -12.2°C | 40 mm | 83% | 0.5 m/s | 1.3 |
| 1994 | 0.6°C | -2.7°C | -6.0°C | 7.6°C | -12.6°C | 46 mm | 86% | 0.5 m/s | 1 |
| 1993 | 2.2°C | -1.3°C | -4.8°C | 12.5°C | -21.5°C | 74 mm | 84% | 0.5 m/s | 0.8 |
| 1992 | 0.4°C | -3.0°C | -6.4°C | 10.0°C | -16.5°C | 56 mm | 85% | 0.5 m/s | 1 |
| 1991 | 0.0°C | -3.7°C | -7.5°C | 11.6°C | -16.0°C | 41 mm | 85% | 0.5 m/s | 1.1 |
| 1990 | 3.5°C | -0.5°C | -4.5°C | 12.8°C | -13.7°C | 75 mm | 83% | 0.5 m/s | 0.9 |
| 1989 ❄️ | -6.3°C | -9.9°C | -13.6°C | 4.8°C | -21.7°C | 12 mm | 82% | 0.5 m/s | 1.3 |
| 1988 | -0.4°C | -4.1°C | -7.8°C | 7.4°C | -16.6°C | 16 mm | 81% | 0.5 m/s | 1.1 |
| 1987 | -0.8°C | -3.4°C | -6.0°C | 11.8°C | -15.8°C | 36 mm | 88% | 0.6 m/s | 1.2 |
| 1986 | 0.6°C | -3.4°C | -7.3°C | 9.4°C | -17.0°C | 14 mm | 82% | 0.5 m/s | 1.1 |
| 1985 | -1.0°C | -5.4°C | -9.9°C | 11.2°C | -18.1°C | 32 mm | 85% | 0.5 m/s | 1.1 |
| 1984 | 1.7°C | -2.3°C | -6.4°C | 9.9°C | -20.1°C | 110 mm | 85% | 0.5 m/s | 1 |
| 1983 | 0.2°C | -3.4°C | -6.9°C | 11.0°C | -17.4°C | 135 mm | 88% | 0.5 m/s | — |
| 1982 | 2.1°C | -1.7°C | -5.5°C | 13.6°C | -18.6°C | 111 mm | 89% | 0.5 m/s | — |
| 1981 | 2.8°C | 0.1°C | -2.6°C | 13.4°C | -8.6°C | 83 mm | 89% | 0.4 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 1°C with lows near -5.7°C (mean -2.3°C), based on 45 years of NASA POWER data.
December averages 84 mm of rainfall in New Glasgow, a relatively wet time of year. The wettest on record was 167 mm in 2010.
The hottest December reached 15°C in 2008. The coldest dipped to -21.7°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.2°C. Daytime highs moved from 1.2°C to 2°C and overnight lows from -6.3°C to -4.6°C over the same span.
December is one of the cooler months of the year in New Glasgow and a relatively wet time of year, so plan for around 1°C daytime highs and -5.7°C at night.
Not quite — December is the 3rd coolest month in New Glasgow, averaging -2.3°C.
For December in New Glasgow, pack warm layers and a jacket for chilly mornings, with typical highs of 1°C and lows of -5.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 87% — quite humid.
Average wind speed in December is 0.5 m/s. The windiest December on record averaged 0.6 m/s (1987).
The wettest December on record was 2010 with 167 mm. On average, December sees 84 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 New Glasgow 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.
