December is one of the cooler months of the year in Charlottetown, with average highs near 0.4°C and lows around -4.7°C (mean -2.1°C). It is about average for rainfall, averaging 90 mm of rainfall and 87% relative humidity across the period.
December is one of the cooler months of the year in Charlottetown. Across 45 years of records, the warmest December in Charlottetown was 2010 — when the month averaged 1.9°C — while the coldest was 1989 at -10.4°C. Typical December days reach 0.4°C with nights near -4.7°C. The long-term trend is warming, about 0.6°C per decade.
December is about average for rainfall in Charlottetown, averaging 90 mm of rainfall. The wettest December on record was 2008 with 166 mm, while the driest was 1986 at 26 mm.
Relative humidity in Charlottetown during December averages 87%. The most humid December was 1989 at 92%, and the least humid was 2025 at 82%.
December receives about 0.9 kWh/m²/day of solar energy in Charlottetown. The sunniest Decembers were 2021, 2023 and 2024, among others at 1 kWh/m²/day, and the cloudiest were 1993 and 2013 at 0.7.
Average wind speed in Charlottetown during December is 3.8 m/s. The windiest December was 2010 at 4.7 m/s, while the calmest was 2018 at 3.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -3.9°C | -2.2°C | -2.1°C | -1.6°C | -0.6°C | +3.3°C |
| Avg High | -1.1°C | 0.4°C | 0.3°C | 0.8°C | 1.8°C | +2.9°C |
| Avg Low | -6.7°C | -4.7°C | -4.6°C | -4.0°C | -3.1°C | +3.6°C |
| Avg Rain | 71 mm | 79 mm | 105 mm | 107 mm | 81 mm | +9 mm |
December temperatures in Charlottetown have risen by about 1.8°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -21.7°C (1989) to a record high of 13.4°C (2011).
Rainfall in December is about average for rainfall, averaging 90 mm, with a wettest year of 166 mm.
A quieter season to visit Charlottetown
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Charlottetown. That said, December — with days averaging 0.4°C and nights around -4.7°C (mean -2.1°C) and higher rainfall (90 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 | 0.0°C | -2.6°C | -5.3°C | 11.1°C | -10.5°C | 69 mm | 82% | 4.6 m/s | — |
| 2024 | 1.5°C | -0.7°C | -2.9°C | 12.3°C | -9.0°C | 61 mm | 85% | 3.6 m/s | 1 |
| 2023 | 2.8°C | 0.8°C | -1.2°C | 12.1°C | -5.3°C | 84 mm | 87% | 3.9 m/s | 1 |
| 2022 | 2.1°C | -0.2°C | -2.4°C | 11.0°C | -9.0°C | 100 mm | 87% | 3.3 m/s | 0.9 |
| 2021 | 1.4°C | -1.5°C | -4.4°C | 11.1°C | -12.8°C | 68 mm | 83% | 3.4 m/s | 1 |
| 2020 | 3.2°C | 0.5°C | -2.3°C | 13.2°C | -10.3°C | 102 mm | 88% | 3.4 m/s | 0.9 |
| 2019 | 0.0°C | -2.7°C | -5.4°C | 9.8°C | -10.0°C | 69 mm | 85% | 3.5 m/s | 0.9 |
| 2018 | -2.4°C | -4.9°C | -7.4°C | 7.9°C | -12.9°C | 72 mm | 89% | 3.2 m/s | 0.9 |
| 2017 | -1.4°C | -4.3°C | -7.1°C | 10.7°C | -17.7°C | 93 mm | 86% | 3.5 m/s | 0.9 |
| 2016 | -0.8°C | -3.7°C | -6.6°C | 8.3°C | -18.7°C | 96 mm | 90% | 3.6 m/s | 0.8 |
| 2015 | 2.6°C | 0.8°C | -1.0°C | 7.9°C | -9.0°C | 130 mm | 89% | 3.5 m/s | 0.8 |
| 2014 | 2.6°C | 0.3°C | -2.1°C | 10.6°C | -12.4°C | 150 mm | 85% | 3.6 m/s | 0.8 |
| 2013 | -1.9°C | -4.4°C | -6.9°C | 5.7°C | -14.9°C | 147 mm | 91% | 4 m/s | 0.7 |
| 2012 | 2.2°C | 0.0°C | -2.2°C | 8.3°C | -7.6°C | 95 mm | 88% | 4.2 m/s | 0.8 |
| 2011 | 3.2°C | 0.7°C | -1.9°C | 13.4°C | -7.4°C | 95 mm | 84% | 3.8 m/s | 0.9 |
| 2010 🔥 | 3.6°C | 1.9°C | 0.2°C | 11.6°C | -4.1°C | 122 mm | 88% | 4.7 m/s | 0.8 |
| 2009 | 0.5°C | -1.5°C | -3.5°C | 10.1°C | -12.1°C | 105 mm | 89% | 4.3 m/s | 0.8 |
| 2008 🌧️ | 2.6°C | -0.7°C | -4.0°C | 12.9°C | -10.0°C | 166 mm | 85% | 4.3 m/s | 0.8 |
| 2007 | -1.2°C | -3.5°C | -5.9°C | 6.8°C | -10.9°C | 104 mm | 87% | 4.3 m/s | 0.8 |
| 2006 | 0.1°C | -2.5°C | -5.2°C | 8.9°C | -12.2°C | 95 mm | 88% | 3.4 m/s | 0.9 |
| 2005 | 0.8°C | -1.2°C | -3.2°C | 9.9°C | -8.9°C | 97 mm | 87% | 4.2 m/s | 0.8 |
| 2004 | -0.4°C | -3.3°C | -6.2°C | 9.0°C | -13.9°C | 124 mm | 87% | 3.9 m/s | 0.8 |
| 2003 | 0.9°C | -1.4°C | -3.6°C | 8.2°C | -9.9°C | 100 mm | 86% | 4 m/s | 0.9 |
| 2002 | -0.7°C | -3.0°C | -5.3°C | 6.3°C | -14.9°C | 89 mm | 88% | 3.9 m/s | 0.9 |
| 2001 | 1.5°C | -0.3°C | -2.1°C | 10.5°C | -5.3°C | 55 mm | 86% | 3.4 m/s | 1 |
| 2000 | -1.0°C | -3.9°C | -6.8°C | 10.1°C | -14.0°C | 115 mm | 86% | 4.3 m/s | 1 |
| 1999 | 1.6°C | -0.8°C | -3.3°C | 9.9°C | -12.3°C | 102 mm | 86% | 3.6 m/s | 0.8 |
| 1998 | 0.8°C | -1.8°C | -4.4°C | 9.0°C | -14.9°C | 51 mm | 84% | 3.9 m/s | 0.9 |
| 1997 | -0.4°C | -2.8°C | -5.3°C | 5.6°C | -13.6°C | 74 mm | 88% | 3.7 m/s | 0.9 |
| 1996 | 2.5°C | -0.1°C | -2.8°C | 9.8°C | -16.4°C | 109 mm | 88% | 3.6 m/s | 0.9 |
| 1995 | -1.3°C | -3.3°C | -5.3°C | 5.1°C | -11.5°C | 59 mm | 84% | 3.9 m/s | 0.9 |
| 1994 | -0.4°C | -2.7°C | -5.1°C | 4.5°C | -11.1°C | 64 mm | 87% | 3.8 m/s | 0.8 |
| 1993 | 0.5°C | -2.0°C | -4.5°C | 10.0°C | -20.4°C | 73 mm | 87% | 3.9 m/s | 0.7 |
| 1992 | -0.2°C | -2.8°C | -5.3°C | 6.6°C | -14.9°C | 72 mm | 86% | 3.8 m/s | 0.8 |
| 1991 | -0.8°C | -3.9°C | -7.0°C | 8.3°C | -14.0°C | 52 mm | 87% | 3.6 m/s | 0.8 |
| 1990 | 1.8°C | -1.3°C | -4.5°C | 11.0°C | -12.9°C | 133 mm | 87% | 3.6 m/s | 0.8 |
| 1989 ❄️ | -7.3°C | -10.4°C | -13.5°C | 1.8°C | -21.7°C | 36 mm | 92% | 4.1 m/s | 0.9 |
| 1988 | -1.6°C | -4.4°C | -7.3°C | 5.2°C | -16.5°C | 36 mm | 84% | 3.6 m/s | 0.9 |
| 1987 | -1.7°C | -3.9°C | -6.1°C | 9.4°C | -14.9°C | 81 mm | 91% | 3.9 m/s | 0.8 |
| 1986 | -0.4°C | -3.4°C | -6.4°C | 7.7°C | -15.6°C | 26 mm | 84% | 3.8 m/s | 0.9 |
| 1985 | -2.2°C | -5.6°C | -9.0°C | 7.9°C | -16.7°C | 44 mm | 86% | 3.5 m/s | 0.9 |
| 1984 | 0.5°C | -2.7°C | -5.8°C | 5.7°C | -19.0°C | 91 mm | 86% | 3.6 m/s | 0.9 |
| 1983 | -0.6°C | -3.3°C | -6.1°C | 8.9°C | -16.1°C | 129 mm | 87% | 4.1 m/s | — |
| 1982 | 1.5°C | -1.3°C | -4.1°C | 10.9°C | -14.5°C | 108 mm | 86% | 3.8 m/s | — |
| 1981 | 1.8°C | -0.1°C | -2.0°C | 11.3°C | -8.8°C | 90 mm | 88% | 3.4 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 0.4°C with lows near -4.7°C (mean -2.1°C), based on 45 years of NASA POWER data.
December averages 90 mm of rainfall in Charlottetown, about average for rainfall. The wettest on record was 166 mm in 2008.
The hottest December reached 13.4°C in 2011. 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 1.8°C. Daytime highs moved from 0.2°C to 1.6°C and overnight lows from -5.4°C to -3.2°C over the same span.
December is one of the cooler months of the year in Charlottetown and about average for rainfall, so plan for around 0.4°C daytime highs and -4.7°C at night.
Not quite — December is the 4th coolest month in Charlottetown, averaging -2.1°C.
For December in Charlottetown, pack warm layers and a jacket for chilly mornings, with typical highs of 0.4°C and lows of -4.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 87% — quite humid.
Average wind speed in December is 3.8 m/s. The windiest December on record averaged 4.7 m/s (2010).
The wettest December on record was 2008 with 166 mm. On average, December sees 90 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 Charlottetown 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.
