December is one of the cooler months of the year in Monroe, with average highs near 2.5°C and lows around -5.2°C (mean -1.3°C). It is about average for rainfall, averaging 99 mm of rainfall and 88% relative humidity across the period.
December is one of the cooler months of the year in Monroe. Across 45 years of records, the warmest December in Monroe was 2015 — when the month averaged 5.3°C — while the coldest was 1989 at -8.3°C. Typical December days reach 2.5°C with nights near -5.2°C. The long-term trend is warming, about 0.4°C per decade.
December is about average for rainfall in Monroe, averaging 99 mm of rainfall. The wettest December on record was 2023 with 212 mm, while the driest was 1988 at 29 mm.
Relative humidity in Monroe during December averages 88%. The most humid December was 1996 at 94%, and the least humid was 1998 at 79%.
December receives about 1.5 kWh/m²/day of solar energy in Monroe. The sunniest December was 1989 at 1.8 kWh/m²/day, and the cloudiest were 1992 and 2014 at 1.2.
Average wind speed in Monroe during December is 0.2 m/s. The windiest Decembers were 2020, 2022 and 2025, among others at 0.3 m/s, while the calmest were 2021, 2023 and 2024, among others at 0.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | -2.7°C | -0.9°C | -1.7°C | -0.7°C | -0.6°C | +2.1°C |
| Avg High | 1.2°C | 3.0°C | 2.2°C | 3.0°C | 3.4°C | +2.2°C |
| Avg Low | -6.6°C | -4.9°C | -5.6°C | -4.3°C | -4.6°C | +2°C |
| Avg Rain | 75 mm | 97 mm | 113 mm | 102 mm | 109 mm | +34 mm |
December temperatures in Monroe have risen by about 1.7°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -20.5°C (2005) to a record high of 19.6°C (2015).
Rainfall in December is about average for rainfall, averaging 99 mm, with a wettest year of 212 mm.
A quieter season to visit Monroe
If your dates are flexible, the more temperate months of July and August tend to be the most comfortable for visiting Monroe. That said, December — with days averaging 2.5°C and nights around -5.2°C (mean -1.3°C) and higher rainfall (99 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 | -4.0°C | -8.0°C | 10.3°C | -13.7°C | 84 mm | 85% | 0.3 m/s | — |
| 2024 | 2.6°C | -1.3°C | -5.2°C | 14.1°C | -15.3°C | 106 mm | 86% | 0.2 m/s | 1.5 |
| 2023 🌧️ | 5.8°C | 2.1°C | -1.6°C | 15.0°C | -7.6°C | 212 mm | 92% | 0.2 m/s | 1.3 |
| 2022 | 3.2°C | -1.3°C | -5.8°C | 12.6°C | -16.4°C | 111 mm | 88% | 0.3 m/s | 1.5 |
| 2021 | 5.4°C | 1.7°C | -2.1°C | 14.9°C | -7.0°C | 45 mm | 88% | 0.2 m/s | 1.5 |
| 2020 | 3.1°C | -0.9°C | -4.8°C | 15.0°C | -18.1°C | 96 mm | 88% | 0.3 m/s | 1.4 |
| 2019 | 1.6°C | -1.8°C | -5.2°C | 8.3°C | -13.3°C | 121 mm | 92% | 0.2 m/s | 1.4 |
| 2018 | 3.0°C | -0.6°C | -4.2°C | 13.0°C | -10.1°C | 134 mm | 91% | 0.2 m/s | 1.4 |
| 2017 | 0.7°C | -2.8°C | -6.3°C | 12.2°C | -16.2°C | 40 mm | 81% | 0.3 m/s | 1.4 |
| 2016 | 2.2°C | -1.5°C | -5.3°C | 12.5°C | -12.7°C | 71 mm | 85% | 0.2 m/s | 1.4 |
| 2015 🔥 | 9.3°C | 5.3°C | 1.4°C | 19.6°C | -4.3°C | 109 mm | 89% | 0.2 m/s | 1.3 |
| 2014 | 2.8°C | -0.4°C | -3.7°C | 11.9°C | -9.6°C | 97 mm | 88% | 0.2 m/s | 1.2 |
| 2013 | 1.4°C | -2.6°C | -6.6°C | 15.7°C | -20.4°C | 96 mm | 91% | 0.3 m/s | 1.3 |
| 2012 | 4.2°C | 0.6°C | -3.0°C | 13.9°C | -10.3°C | 138 mm | 91% | 0.3 m/s | 1.3 |
| 2011 | 5.2°C | 1.0°C | -3.1°C | 13.6°C | -9.0°C | 118 mm | 91% | 0.3 m/s | 1.7 |
| 2010 | -0.3°C | -3.8°C | -7.3°C | 15.0°C | -11.1°C | 96 mm | 85% | 0.3 m/s | 1.6 |
| 2009 | 1.2°C | -2.4°C | -6.0°C | 16.0°C | -13.0°C | 142 mm | 86% | 0.3 m/s | 1.5 |
| 2008 | 1.6°C | -2.4°C | -6.4°C | 13.4°C | -16.8°C | 165 mm | 92% | 0.3 m/s | 1.3 |
| 2007 | 0.8°C | -2.5°C | -5.9°C | 10.4°C | -12.4°C | 138 mm | 92% | 0.2 m/s | 1.3 |
| 2006 | 6.2°C | 1.9°C | -2.3°C | 18.8°C | -10.3°C | 52 mm | 88% | 0.2 m/s | 1.6 |
| 2005 | 0.4°C | -3.4°C | -7.2°C | 7.3°C | -20.5°C | 95 mm | 91% | 0.3 m/s | 1.5 |
| 2004 | 2.4°C | -1.7°C | -5.8°C | 11.9°C | -15.8°C | 98 mm | 88% | 0.2 m/s | 1.5 |
| 2003 | 2.1°C | -1.6°C | -5.4°C | 10.7°C | -10.9°C | 151 mm | 90% | 0.3 m/s | 1.5 |
| 2002 | 0.5°C | -3.1°C | -6.7°C | 10.4°C | -13.2°C | 117 mm | 90% | 0.3 m/s | 1.5 |
| 2001 | 6.6°C | 2.2°C | -2.1°C | 19.2°C | -8.4°C | 55 mm | 80% | 0.2 m/s | 1.7 |
| 2000 | -0.3°C | -4.3°C | -8.3°C | 15.3°C | -13.2°C | 118 mm | 81% | 0.3 m/s | 1.7 |
| 1999 | 3.9°C | -0.1°C | -4.2°C | 14.6°C | -12.1°C | 57 mm | 84% | 0.2 m/s | 1.5 |
| 1998 | 6.3°C | 1.6°C | -3.1°C | 19.3°C | -12.9°C | 34 mm | 79% | 0.2 m/s | 1.5 |
| 1997 | 2.3°C | -1.6°C | -5.6°C | 7.7°C | -14.7°C | 81 mm | 90% | 0.2 m/s | 1.6 |
| 1996 | 2.8°C | -0.2°C | -3.2°C | 12.1°C | -10.9°C | 195 mm | 94% | 0.2 m/s | 1.4 |
| 1995 | -1.6°C | -5.2°C | -8.7°C | 5.7°C | -14.7°C | 56 mm | 92% | 0.3 m/s | 1.6 |
| 1994 | 4.8°C | 0.3°C | -4.2°C | 13.9°C | -11.8°C | 83 mm | 85% | 0.3 m/s | 1.5 |
| 1993 | 1.6°C | -2.2°C | -6.1°C | 8.6°C | -17.2°C | 105 mm | 87% | 0.3 m/s | 1.4 |
| 1992 | 2.0°C | -1.6°C | -5.2°C | 9.6°C | -12.0°C | 114 mm | 88% | 0.3 m/s | 1.2 |
| 1991 | 3.3°C | -0.7°C | -4.7°C | 12.9°C | -13.2°C | 84 mm | 85% | 0.2 m/s | 1.5 |
| 1990 | 4.6°C | 0.6°C | -3.5°C | 15.7°C | -11.8°C | 158 mm | 87% | 0.2 m/s | 1.4 |
| 1989 ❄️ | -4.0°C | -8.3°C | -12.5°C | 2.2°C | -19.7°C | 32 mm | 85% | 0.2 m/s | 1.8 |
| 1988 | 1.7°C | -2.3°C | -6.3°C | 10.1°C | -16.8°C | 29 mm | 82% | 0.2 m/s | 1.6 |
| 1987 | 2.7°C | -0.8°C | -4.3°C | 9.6°C | -15.7°C | 46 mm | 88% | 0.2 m/s | 1.4 |
| 1986 | 2.6°C | -1.3°C | -5.3°C | 7.0°C | -13.2°C | 102 mm | 89% | 0.2 m/s | 1.6 |
| 1985 | -0.3°C | -4.3°C | -8.3°C | 5.5°C | -15.2°C | 52 mm | 88% | 0.2 m/s | 1.5 |
| 1984 | 4.4°C | 0.5°C | -3.4°C | 13.3°C | -10.4°C | 78 mm | 88% | 0.2 m/s | 1.3 |
| 1983 | -0.6°C | -4.3°C | -8.0°C | 9.9°C | -19.7°C | 188 mm | 88% | 0.3 m/s | — |
| 1982 | 5.0°C | 0.8°C | -3.3°C | 18.8°C | -11.8°C | 45 mm | 84% | 0.2 m/s | — |
| 1981 | -0.5°C | -4.1°C | -7.8°C | 6.6°C | -18.1°C | 100 mm | 92% | 0.2 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 2.5°C with lows near -5.2°C (mean -1.3°C), based on 45 years of NASA POWER data.
December averages 99 mm of rainfall in Monroe, about average for rainfall. The wettest on record was 212 mm in 2023.
The hottest December reached 19.6°C in 2015. The coldest dipped to -20.5°C in 2005.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.7°C. Daytime highs moved from 1.6°C to 3.4°C and overnight lows from -6.2°C to -4.5°C over the same span.
December is one of the cooler months of the year in Monroe and about average for rainfall, so plan for around 2.5°C daytime highs and -5.2°C at night.
Not quite — December is the 3rd coolest month in Monroe, averaging -1.3°C.
For December in Monroe, pack warm layers and a jacket for chilly mornings, with typical highs of 2.5°C and lows of -5.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 88% — quite humid.
Average wind speed in December is 0.2 m/s. The windiest December on record averaged 0.3 m/s (1983).
The wettest December on record was 2023 with 212 mm. On average, December sees 99 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 Monroe 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.
