December is one of the cooler months of the year in Salmon Arm, with average highs near -5.3°C and lows around -12.9°C (mean -9.1°C). It is a relatively wet time of year, averaging 63 mm of rainfall and 97% relative humidity across the period.
December is one of the cooler months of the year in Salmon Arm. Across 45 years of records, the warmest December in Salmon Arm was 2025 — when the month averaged -4.5°C — while the coldest was 1983 at -16.3°C. Typical December days reach -5.3°C with nights near -12.9°C. The long-term trend is warming, about 0.6°C per decade.
December is a relatively wet time of year in Salmon Arm, averaging 63 mm of rainfall. The wettest December on record was 2025 with 125 mm, while the driest was 1991 at 22 mm.
Relative humidity in Salmon Arm during December averages 97%. The most humid December was 1996 at 99%, and the least humid was 1998 at 92%.
December receives about 0.7 kWh/m²/day of solar energy in Salmon Arm. The sunniest Decembers were 1984, 2009 and 2011 at 0.8 kWh/m²/day, and the cloudiest were 1998, 2007 and 2012, among others at 0.5.
Average wind speed in Salmon Arm during December is 0.3 m/s. The windiest Decembers were 2012, 2016 and 2017, among others at 0.4 m/s, while the calmest were 2023, 2024 and 2025, among others at 0.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -10.5°C | -9.2°C | -8.9°C | -8.9°C | -7.7°C | +2.8°C |
| Avg High | -6.5°C | -5.3°C | -5.0°C | -5.2°C | -4.2°C | +2.3°C |
| Avg Low | -14.4°C | -13.0°C | -12.8°C | -12.6°C | -11.1°C | +3.3°C |
| Avg Rain | 51 mm | 60 mm | 55 mm | 71 mm | 89 mm | +38 mm |
December temperatures in Salmon Arm have risen by about 4.5°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -41.3°C (1990) to a record high of 7.1°C (2021).
Rainfall in December is a relatively wet time of year, averaging 63 mm, with a wettest year of 125 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 Salmon Arm
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Salmon Arm. That said, December — with days averaging -5.3°C and nights around -12.9°C (mean -9.1°C) and moderate rainfall (63 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 🔥 🌧️ | -1.7°C | -4.5°C | -7.3°C | 2.1°C | -21.9°C | 125 mm | 98% | 0.3 m/s | — |
| 2024 | -2.5°C | -5.8°C | -9.2°C | 0.5°C | -16.4°C | 96 mm | 99% | 0.3 m/s | 0.6 |
| 2023 | -1.6°C | -5.2°C | -8.8°C | 1.8°C | -24.3°C | 74 mm | 99% | 0.3 m/s | 0.6 |
| 2022 | -9.0°C | -12.7°C | -16.4°C | 1.1°C | -37.2°C | 73 mm | 99% | 0.3 m/s | 0.7 |
| 2021 | -7.8°C | -11.5°C | -15.3°C | 7.1°C | -38.4°C | 67 mm | 93% | 0.3 m/s | 0.7 |
| 2020 | -2.9°C | -6.3°C | -9.7°C | 1.3°C | -23.1°C | 98 mm | 98% | 0.3 m/s | 0.7 |
| 2019 | -3.8°C | -7.3°C | -10.7°C | 1.2°C | -23.5°C | 121 mm | 99% | 0.3 m/s | 0.6 |
| 2018 | -3.3°C | -6.7°C | -10.0°C | 1.4°C | -18.5°C | 65 mm | 96% | 0.3 m/s | 0.6 |
| 2017 | -7.4°C | -10.9°C | -14.5°C | -0.6°C | -28.2°C | 78 mm | 97% | 0.4 m/s | 0.7 |
| 2016 | -9.4°C | -13.7°C | -18.0°C | 0.3°C | -31.1°C | 62 mm | 98% | 0.4 m/s | 0.6 |
| 2015 | -5.4°C | -9.0°C | -12.5°C | 0.6°C | -23.1°C | 81 mm | 99% | 0.3 m/s | 0.6 |
| 2014 | -3.9°C | -7.2°C | -10.6°C | 1.3°C | -27.1°C | 66 mm | 98% | 0.3 m/s | 0.7 |
| 2013 | -6.4°C | -10.1°C | -13.8°C | 0.9°C | -35.8°C | 64 mm | 99% | 0.3 m/s | 0.6 |
| 2012 | -4.3°C | -7.7°C | -11.1°C | 2.2°C | -22.2°C | 78 mm | 98% | 0.4 m/s | 0.5 |
| 2011 | -2.5°C | -6.2°C | -9.9°C | 0.8°C | -16.7°C | 36 mm | 95% | 0.3 m/s | 0.8 |
| 2010 | -5.9°C | -10.2°C | -14.5°C | 0.0°C | -29.7°C | 55 mm | 99% | 0.4 m/s | 0.7 |
| 2009 | -7.9°C | -12.1°C | -16.2°C | 0.0°C | -26.7°C | 40 mm | 94% | 0.4 m/s | 0.8 |
| 2008 | -9.1°C | -13.2°C | -17.4°C | 3.3°C | -37.9°C | 75 mm | 97% | 0.3 m/s | 0.7 |
| 2007 | -4.6°C | -8.2°C | -11.9°C | 1.7°C | -21.2°C | 76 mm | 96% | 0.3 m/s | 0.5 |
| 2006 | -3.9°C | -7.9°C | -11.9°C | 0.3°C | -22.2°C | 50 mm | 99% | 0.3 m/s | 0.6 |
| 2005 | -4.6°C | -8.2°C | -11.9°C | 1.8°C | -23.0°C | 34 mm | 96% | 0.4 m/s | 0.7 |
| 2004 | -3.2°C | -6.7°C | -10.1°C | 0.7°C | -17.8°C | 75 mm | 98% | 0.3 m/s | 0.6 |
| 2003 | -4.6°C | -9.0°C | -13.4°C | 0.1°C | -26.3°C | 35 mm | 99% | 0.4 m/s | 0.7 |
| 2002 | -1.4°C | -4.9°C | -8.5°C | 3.4°C | -16.6°C | 52 mm | 93% | 0.3 m/s | 0.7 |
| 2001 | -5.1°C | -9.3°C | -13.6°C | 0.8°C | -23.4°C | 61 mm | 98% | 0.4 m/s | 0.7 |
| 2000 | -6.0°C | -9.8°C | -13.5°C | 0.9°C | -26.4°C | 53 mm | 95% | 0.4 m/s | 0.7 |
| 1999 | -3.0°C | -6.7°C | -10.3°C | 0.8°C | -17.1°C | 54 mm | 98% | 0.3 m/s | 0.6 |
| 1998 | -4.2°C | -7.6°C | -10.9°C | 2.7°C | -26.6°C | 92 mm | 92% | 0.3 m/s | 0.5 |
| 1997 | -1.9°C | -5.4°C | -8.8°C | 1.5°C | -13.8°C | 47 mm | 94% | 0.3 m/s | 0.7 |
| 1996 | -9.6°C | -14.0°C | -18.5°C | 0.1°C | -35.9°C | 65 mm | 99% | 0.4 m/s | 0.6 |
| 1995 | -5.7°C | -9.8°C | -13.8°C | 1.1°C | -26.5°C | 70 mm | 95% | 0.3 m/s | 0.7 |
| 1994 | -4.9°C | -8.9°C | -12.8°C | 0.9°C | -26.4°C | 52 mm | 96% | 0.3 m/s | 0.7 |
| 1993 | -4.6°C | -8.0°C | -11.3°C | 0.7°C | -21.5°C | 67 mm | 98% | 0.3 m/s | 0.7 |
| 1992 | -8.7°C | -13.0°C | -17.2°C | 0.0°C | -28.2°C | 54 mm | 99% | 0.4 m/s | 0.7 |
| 1991 | -1.5°C | -5.1°C | -8.7°C | 2.6°C | -15.5°C | 22 mm | 94% | 0.3 m/s | 0.6 |
| 1990 | -8.6°C | -13.2°C | -17.9°C | 0.7°C | -41.3°C | 82 mm | 98% | 0.3 m/s | 0.7 |
| 1989 | -2.5°C | -5.8°C | -9.1°C | 1.4°C | -17.5°C | 57 mm | 98% | 0.3 m/s | 0.5 |
| 1988 | -5.1°C | -9.1°C | -13.0°C | 1.2°C | -26.7°C | 56 mm | 98% | 0.3 m/s | 0.7 |
| 1987 | -5.2°C | -8.9°C | -12.7°C | 1.8°C | -28.3°C | 61 mm | 96% | 0.3 m/s | 0.6 |
| 1986 | -4.6°C | -8.4°C | -12.3°C | 0.4°C | -21.5°C | 44 mm | 96% | 0.3 m/s | 0.7 |
| 1985 | -6.2°C | -9.8°C | -13.5°C | 0.0°C | -28.2°C | 24 mm | 98% | 0.3 m/s | 0.7 |
| 1984 | -11.5°C | -15.9°C | -20.3°C | -2.5°C | -36.5°C | 58 mm | 99% | 0.3 m/s | 0.8 |
| 1983 ❄️ | -11.6°C | -16.3°C | -20.9°C | -0.2°C | -37.3°C | 48 mm | 98% | 0.4 m/s | — |
| 1982 | -6.7°C | -10.4°C | -14.1°C | 0.1°C | -25.1°C | 45 mm | 99% | 0.3 m/s | — |
| 1981 | -5.4°C | -9.6°C | -13.7°C | 0.8°C | -26.4°C | 66 mm | 98% | 0.3 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around -5.3°C with lows near -12.9°C (mean -9.1°C), based on 45 years of NASA POWER data.
December averages 63 mm of rainfall in Salmon Arm, a relatively wet time of year. The wettest on record was 125 mm in 2025.
The hottest December reached 7.1°C in 2021. The coldest dipped to -41.3°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 4.5°C. Daytime highs moved from -8.3°C to -4.5°C and overnight lows from -16.5°C to -11.4°C over the same span.
December is one of the cooler months of the year in Salmon Arm and a relatively wet time of year, so plan for around -5.3°C daytime highs and -12.9°C at night.
Yes — December is the coldest month of the year in Salmon Arm, averaging -9.1°C.
For December in Salmon Arm, pack warm layers and a jacket for chilly mornings, with typical highs of -5.3°C and lows of -12.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 97% — quite humid.
Average wind speed in December is 0.3 m/s. The windiest December on record averaged 0.4 m/s (1983).
The wettest December on record was 2025 with 125 mm. On average, December sees 63 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 Salmon Arm 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.
