December is one of the cooler months of the year in Billings, with average highs near 1.7°C and lows around -7.3°C (mean -2.8°C). It is one of the drier months, averaging 18 mm of rainfall and 71% relative humidity across the period.
December is one of the cooler months of the year in Billings. Across 45 years of records, the warmest December in Billings was 2023 — when the month averaged 2.2°C — while the coldest was 1983 at -12°C. Typical December days reach 1.7°C with nights near -7.3°C. The long-term trend is warming, about 0.8°C per decade.
December is one of the drier months in Billings, averaging 18 mm of rainfall. The wettest December on record was 1989 with 41 mm, while the driest was 2001 at 5 mm.
Relative humidity in Billings during December averages 71%. The most humid December was 2010 at 82%, and the least humid was 1990 at 57%.
December receives about 1.4 kWh/m²/day of solar energy in Billings. The sunniest December was 1986 at 1.7 kWh/m²/day, and the cloudiest was 2021 at 1.1.
Average wind speed in Billings during December is 3.3 m/s. The windiest Decembers were 1990 and 1999 at 3.9 m/s, while the calmest were 1995, 2002 and 2010, among others at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -4.2°C | -2.9°C | -2.8°C | -3.0°C | -0.1°C | +4.1°C |
| Avg High | 0.4°C | 1.5°C | 1.7°C | 1.4°C | 4.6°C | +4.2°C |
| Avg Low | -8.8°C | -7.4°C | -7.4°C | -7.4°C | -4.7°C | +4.1°C |
| Avg Rain | 19 mm | 16 mm | 14 mm | 22 mm | 20 mm | +1 mm |
December temperatures in Billings have risen by about 5.4°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -36.2°C (1983) to a record high of 19.1°C (2021).
Rainfall in December is one of the drier months, averaging 18 mm, with a wettest year of 41 mm.
A quieter season to visit Billings
If your dates are flexible, the more temperate months of August and July tend to be the most comfortable for visiting Billings. That said, December — with days averaging 1.7°C and nights around -7.3°C (mean -2.8°C) and low rainfall (18 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 | 6.6°C | 1.8°C | -3.0°C | 14.0°C | -11.2°C | 33 mm | 70% | 3.6 m/s | — |
| 2024 | 6.5°C | 2.1°C | -2.3°C | 12.4°C | -8.1°C | 17 mm | 67% | 2.8 m/s | 1.4 |
| 2023 🔥 | 6.5°C | 2.2°C | -2.1°C | 15.6°C | -6.4°C | 9 mm | 70% | 2.7 m/s | 1.5 |
| 2022 | -0.7°C | -5.4°C | -10.2°C | 8.2°C | -33.4°C | 19 mm | 75% | 3 m/s | 1.6 |
| 2021 | 2.9°C | -1.9°C | -6.7°C | 19.1°C | -19.0°C | 28 mm | 65% | 3.5 m/s | 1.1 |
| 2020 | 5.5°C | 0.9°C | -3.8°C | 13.4°C | -8.5°C | 12 mm | 66% | 3.4 m/s | 1.4 |
| 2019 | 3.9°C | -0.3°C | -4.5°C | 9.3°C | -10.0°C | 8 mm | 75% | 2.9 m/s | 1.5 |
| 2018 | 3.0°C | -1.5°C | -5.9°C | 9.0°C | -16.4°C | 13 mm | 69% | 3.3 m/s | 1.4 |
| 2017 | 0.1°C | -3.8°C | -7.8°C | 12.2°C | -27.9°C | 40 mm | 70% | 3.6 m/s | 1.4 |
| 2016 | -3.1°C | -7.5°C | -11.9°C | 6.0°C | -30.2°C | 28 mm | 77% | 3.5 m/s | 1.3 |
| 2015 | 2.2°C | -2.1°C | -6.5°C | 16.0°C | -15.2°C | 23 mm | 73% | 3 m/s | 1.5 |
| 2014 | 2.8°C | -1.4°C | -5.6°C | 11.6°C | -18.9°C | 17 mm | 76% | 2.9 m/s | 1.4 |
| 2013 | -1.3°C | -5.8°C | -10.3°C | 7.6°C | -25.9°C | 41 mm | 76% | 3.7 m/s | 1.3 |
| 2012 | 2.8°C | -1.8°C | -6.4°C | 14.7°C | -14.5°C | 10 mm | 65% | 3.1 m/s | 1.3 |
| 2011 | 3.2°C | -1.6°C | -6.5°C | 9.9°C | -14.4°C | 11 mm | 70% | 3.8 m/s | 1.6 |
| 2010 | 0.4°C | -4.0°C | -8.4°C | 5.2°C | -21.3°C | 28 mm | 82% | 2.6 m/s | 1.5 |
| 2009 | -2.7°C | -7.2°C | -11.8°C | 7.4°C | -21.6°C | 15 mm | 73% | 3 m/s | 1.4 |
| 2008 | -2.2°C | -6.6°C | -11.0°C | 11.8°C | -23.3°C | 30 mm | 72% | 3.6 m/s | 1.2 |
| 2007 | 1.5°C | -2.9°C | -7.3°C | 11.3°C | -12.5°C | 10 mm | 67% | 3.5 m/s | 1.4 |
| 2006 | 3.8°C | -0.9°C | -5.6°C | 8.8°C | -12.2°C | 12 mm | 69% | 3.2 m/s | 1.4 |
| 2005 | 0.6°C | -3.9°C | -8.3°C | 11.1°C | -20.9°C | 16 mm | 78% | 3.4 m/s | 1.4 |
| 2004 | 4.6°C | 0.1°C | -4.4°C | 14.5°C | -17.4°C | 8 mm | 66% | 3.8 m/s | 1.3 |
| 2003 | 3.6°C | -0.5°C | -4.7°C | 9.7°C | -16.6°C | 29 mm | 71% | 2.9 m/s | 1.4 |
| 2002 | 4.6°C | 0.1°C | -4.5°C | 13.0°C | -9.9°C | 9 mm | 65% | 2.6 m/s | 1.4 |
| 2001 | 2.9°C | -1.5°C | -5.9°C | 7.8°C | -14.6°C | 5 mm | 61% | 3 m/s | 1.6 |
| 2000 | 0.2°C | -4.9°C | -10.1°C | 8.7°C | -21.3°C | 9 mm | 73% | 2.7 m/s | 1.4 |
| 1999 | 5.0°C | 1.0°C | -3.0°C | 11.2°C | -7.9°C | 12 mm | 61% | 3.9 m/s | 1.4 |
| 1998 | 1.3°C | -3.3°C | -7.8°C | 13.2°C | -21.9°C | 19 mm | 68% | 3.8 m/s | 1.3 |
| 1997 | 3.0°C | -1.2°C | -5.5°C | 8.4°C | -12.9°C | 14 mm | 72% | 3.5 m/s | 1.5 |
| 1996 | -1.6°C | -6.0°C | -10.4°C | 6.9°C | -30.5°C | 38 mm | 79% | 3.4 m/s | 1.4 |
| 1995 | 3.0°C | -2.0°C | -7.0°C | 13.3°C | -21.3°C | 13 mm | 71% | 2.6 m/s | 1.5 |
| 1994 | 1.9°C | -2.4°C | -6.6°C | 8.3°C | -13.4°C | 18 mm | 75% | 2.8 m/s | 1.5 |
| 1993 | 2.8°C | -1.1°C | -5.0°C | 8.3°C | -9.8°C | 9 mm | 70% | 3.7 m/s | 1.5 |
| 1992 | -1.7°C | -6.4°C | -11.0°C | 4.2°C | -25.2°C | 22 mm | 71% | 3.2 m/s | 1.3 |
| 1991 | 3.5°C | -1.2°C | -6.0°C | 8.5°C | -11.7°C | 7 mm | 71% | 3.5 m/s | 1.5 |
| 1990 | -1.9°C | -6.9°C | -11.8°C | 12.2°C | -28.3°C | 12 mm | 57% | 3.9 m/s | 1.5 |
| 1989 🌧️ | 0.0°C | -4.8°C | -9.6°C | 10.6°C | -34.4°C | 41 mm | 78% | 3.5 m/s | 1.2 |
| 1988 | 2.1°C | -2.2°C | -6.4°C | 8.9°C | -17.0°C | 20 mm | 66% | 3.6 m/s | 1.4 |
| 1987 | 3.4°C | -1.2°C | -5.9°C | 13.9°C | -17.6°C | 8 mm | 61% | 3.3 m/s | 1.4 |
| 1986 | 3.1°C | -1.5°C | -6.1°C | 6.8°C | -10.8°C | 5 mm | 68% | 3.1 m/s | 1.7 |
| 1985 | 0.0°C | -4.6°C | -9.1°C | 6.6°C | -27.5°C | 7 mm | 77% | 3.8 m/s | 1.4 |
| 1984 | -0.4°C | -5.9°C | -11.3°C | 9.1°C | -20.2°C | 22 mm | 69% | 3 m/s | 1.5 |
| 1983 ❄️ | -7.0°C | -12.0°C | -17.1°C | 4.6°C | -36.2°C | 26 mm | 81% | 2.6 m/s | — |
| 1982 | 0.6°C | -3.4°C | -7.5°C | 7.6°C | -14.3°C | 25 mm | 77% | 3.6 m/s | — |
| 1981 | 2.2°C | -2.0°C | -6.3°C | 12.6°C | -16.1°C | 13 mm | 68% | 3.1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 1.7°C with lows near -7.3°C (mean -2.8°C), based on 45 years of NASA POWER data.
December averages 18 mm of rainfall in Billings, one of the drier months. The wettest on record was 41 mm in 1989.
The hottest December reached 19.1°C in 2021. The coldest dipped to -36.2°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 5.4°C. Daytime highs moved from -0.9°C to 4.4°C and overnight lows from -10.3°C to -4.9°C over the same span.
December is one of the cooler months of the year in Billings and one of the drier months, so plan for around 1.7°C daytime highs and -7.3°C at night.
Yes — December is the coldest month of the year in Billings, averaging -2.8°C.
For December in Billings, pack warm layers and a jacket for chilly mornings, with typical highs of 1.7°C and lows of -7.3°C.
Relative humidity in December averages 71% — moderately humid.
Average wind speed in December is 3.3 m/s. The windiest December on record averaged 3.9 m/s (1990).
The wettest December on record was 1989 with 41 mm. On average, December sees 18 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 Billings 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.
