December is one of the cooler months of the year in Montgomery, with average highs near 14.5°C and lows around 3°C (mean 8.8°C). It is a relatively wet time of year, averaging 128 mm of rainfall and 83% relative humidity across the period.
December is one of the cooler months of the year in Montgomery. Across 45 years of records, the warmest Decembers in Montgomery were 2015 and 2021 — when the month averaged 13.8°C — while the coldest was 1989 at 3.4°C. Typical December days reach 14.5°C with nights near 3°C. The long-term trend is warming, about 0.6°C per decade.
December is a relatively wet time of year in Montgomery, averaging 128 mm of rainfall. The wettest December on record was 2015 with 344 mm, while the driest was 2010 at 35 mm.
Relative humidity in Montgomery during December averages 83%. The most humid December was 1986 at 89%, and the least humid was 2010 at 77%.
December receives about 2.4 kWh/m²/day of solar energy in Montgomery. The sunniest Decembers were 2006, 2010 and 2024, among others at 2.8 kWh/m²/day, and the cloudiest was 1986 at 1.9.
Average wind speed in Montgomery during December is 1.6 m/s. The windiest December was 1983 at 1.9 m/s, while the calmest were 2014, 2017 and 2025, among others at 1.4 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 7.6°C | 8.8°C | 7.9°C | 9.8°C | 10.1°C | +2.5°C |
| Avg High | 13.1°C | 14.4°C | 13.8°C | 15.4°C | 16.2°C | +3.1°C |
| Avg Low | 2.0°C | 3.2°C | 2.1°C | 4.2°C | 3.9°C | +1.9°C |
| Avg Rain | 140 mm | 118 mm | 126 mm | 160 mm | 79 mm | -61 mm |
December temperatures in Montgomery have risen by about 2.6°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -15°C (1989) to a record high of 26.3°C (2013).
Rainfall in December is a relatively wet time of year, averaging 128 mm, with a wettest year of 344 mm.
A quieter season to visit Montgomery
If your dates are flexible, the more temperate months of May and October tend to be the most comfortable for visiting Montgomery. That said, December — with days averaging 14.5°C and nights around 3°C (mean 8.8°C) and higher rainfall (128 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 | 15.7°C | 9.3°C | 2.8°C | 24.4°C | -7.0°C | 66 mm | 78% | 1.4 m/s | — |
| 2024 | 16.1°C | 9.7°C | 3.3°C | 24.8°C | -4.5°C | 118 mm | 78% | 1.6 m/s | 2.8 |
| 2023 | 15.5°C | 9.4°C | 3.2°C | 23.8°C | -3.3°C | 64 mm | 80% | 1.5 m/s | 2.7 |
| 2022 | 15.4°C | 10.2°C | 4.9°C | 24.9°C | -9.0°C | 60 mm | 82% | 1.6 m/s | 2.4 |
| 2021 | 19.9°C | 13.8°C | 7.8°C | 25.7°C | -2.2°C | 108 mm | 87% | 1.5 m/s | 2.2 |
| 2020 | 14.7°C | 8.0°C | 1.3°C | 21.1°C | -5.4°C | 56 mm | 82% | 1.5 m/s | 2.6 |
| 2019 | 16.1°C | 10.7°C | 5.3°C | 23.6°C | -4.1°C | 123 mm | 84% | 1.8 m/s | 2.4 |
| 2018 | 14.4°C | 9.5°C | 4.6°C | 23.5°C | -4.0°C | 227 mm | 87% | 1.6 m/s | 2.1 |
| 2017 | 13.9°C | 8.4°C | 3.0°C | 24.5°C | -5.2°C | 90 mm | 82% | 1.4 m/s | 2 |
| 2016 | 16.0°C | 10.3°C | 4.5°C | 24.2°C | -4.9°C | 99 mm | 81% | 1.6 m/s | 2.2 |
| 2015 🔥 🌧️ | 18.9°C | 13.8°C | 8.7°C | 25.2°C | -2.6°C | 344 mm | 88% | 1.6 m/s | 2.3 |
| 2014 | 16.5°C | 10.7°C | 5.0°C | 25.2°C | -1.5°C | 175 mm | 83% | 1.4 m/s | 2.5 |
| 2013 | 14.9°C | 9.2°C | 3.6°C | 26.3°C | -4.9°C | 227 mm | 85% | 1.5 m/s | 2.1 |
| 2012 | 17.4°C | 11.0°C | 4.7°C | 24.6°C | -5.1°C | 182 mm | 81% | 1.6 m/s | 2.3 |
| 2011 | 15.8°C | 10.0°C | 4.2°C | 23.3°C | -3.4°C | 102 mm | 84% | 1.5 m/s | 2.5 |
| 2010 | 10.2°C | 4.2°C | -1.7°C | 20.4°C | -6.7°C | 35 mm | 77% | 1.8 m/s | 2.8 |
| 2009 | 12.0°C | 6.7°C | 1.4°C | 21.9°C | -4.6°C | 275 mm | 87% | 1.8 m/s | 2.1 |
| 2008 | 15.5°C | 9.7°C | 3.9°C | 22.7°C | -6.5°C | 140 mm | 84% | 1.8 m/s | 2.3 |
| 2007 | 16.7°C | 11.0°C | 5.2°C | 25.9°C | -4.3°C | 84 mm | 80% | 1.4 m/s | 2.4 |
| 2006 | 16.3°C | 9.9°C | 3.6°C | 22.2°C | -7.3°C | 111 mm | 82% | 1.6 m/s | 2.8 |
| 2005 | 12.8°C | 6.8°C | 0.8°C | 23.2°C | -4.7°C | 81 mm | 81% | 1.6 m/s | 2.7 |
| 2004 | 13.3°C | 7.1°C | 1.0°C | 23.4°C | -6.7°C | 79 mm | 81% | 1.6 m/s | 2.7 |
| 2003 | 12.8°C | 6.2°C | -0.4°C | 18.4°C | -4.2°C | 83 mm | 81% | 1.7 m/s | 2.8 |
| 2002 | 13.1°C | 7.5°C | 1.9°C | 21.6°C | -4.9°C | 180 mm | 85% | 1.7 m/s | 2.5 |
| 2001 | 16.3°C | 10.4°C | 4.5°C | 24.0°C | -5.0°C | 95 mm | 81% | 1.5 m/s | 2.7 |
| 2000 | 9.3°C | 4.1°C | -1.2°C | 23.5°C | -7.6°C | 131 mm | 80% | 1.6 m/s | 2.5 |
| 1999 | 15.3°C | 8.6°C | 1.8°C | 23.1°C | -5.3°C | 80 mm | 78% | 1.5 m/s | 2.7 |
| 1998 | 16.8°C | 11.4°C | 5.9°C | 26.2°C | -2.6°C | 70 mm | 82% | 1.6 m/s | 2.2 |
| 1997 | 11.9°C | 6.9°C | 1.9°C | 18.1°C | -4.9°C | 133 mm | 88% | 1.5 m/s | 2.5 |
| 1996 | 15.0°C | 9.0°C | 3.0°C | 23.3°C | -7.0°C | 124 mm | 85% | 1.5 m/s | 2.5 |
| 1995 | 12.7°C | 7.1°C | 1.4°C | 22.1°C | -7.8°C | 167 mm | 83% | 1.6 m/s | 2.4 |
| 1994 | 15.2°C | 9.9°C | 4.6°C | 20.7°C | -3.2°C | 107 mm | 87% | 1.5 m/s | 2.4 |
| 1993 | 12.2°C | 7.0°C | 1.9°C | 21.7°C | -5.1°C | 101 mm | 85% | 1.5 m/s | 2.4 |
| 1992 | 13.0°C | 8.2°C | 3.4°C | 21.7°C | -2.5°C | 176 mm | 88% | 1.6 m/s | 2 |
| 1991 | 15.3°C | 9.3°C | 3.4°C | 24.9°C | -4.6°C | 124 mm | 83% | 1.5 m/s | 2.4 |
| 1990 | 17.0°C | 11.0°C | 5.0°C | 24.7°C | -6.4°C | 93 mm | 81% | 1.6 m/s | 2.3 |
| 1989 ❄️ | 9.0°C | 3.4°C | -2.2°C | 19.1°C | -15.0°C | 179 mm | 84% | 1.6 m/s | 2.4 |
| 1988 | 14.1°C | 7.8°C | 1.5°C | 22.5°C | -5.1°C | 96 mm | 83% | 1.4 m/s | 2.7 |
| 1987 | 16.0°C | 10.1°C | 4.3°C | 24.1°C | -5.1°C | 134 mm | 79% | 1.7 m/s | 2.5 |
| 1986 | 12.2°C | 7.4°C | 2.7°C | 21.6°C | -3.5°C | 78 mm | 89% | 1.4 m/s | 1.9 |
| 1985 | 11.2°C | 5.2°C | -0.8°C | 22.6°C | -7.5°C | 100 mm | 79% | 1.5 m/s | 2.8 |
| 1984 | 18.3°C | 12.5°C | 6.7°C | 24.0°C | -6.6°C | 93 mm | 86% | 1.4 m/s | 2.5 |
| 1983 | 10.5°C | 5.3°C | 0.0°C | 22.6°C | -14.4°C | 211 mm | 84% | 1.9 m/s | — |
| 1982 | 15.4°C | 10.5°C | 5.7°C | 24.8°C | -5.1°C | 185 mm | 88% | 1.8 m/s | — |
| 1981 | 11.2°C | 5.9°C | 0.5°C | 19.2°C | -7.8°C | 180 mm | 78% | 1.7 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 14.5°C with lows near 3°C (mean 8.8°C), based on 45 years of NASA POWER data.
December averages 128 mm of rainfall in Montgomery, a relatively wet time of year. The wettest on record was 344 mm in 2015.
The hottest December reached 26.3°C in 2013. The coldest dipped to -15°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 2.6°C. Daytime highs moved from 13.3°C to 16.5°C and overnight lows from 2.4°C to 4.4°C over the same span.
December is one of the cooler months of the year in Montgomery and a relatively wet time of year, so plan for around 14.5°C daytime highs and 3°C at night.
Not quite — December is the 2nd coolest month in Montgomery, averaging 8.8°C.
For December in Montgomery, pack warm layers and a jacket for chilly mornings, with typical highs of 14.5°C and lows of 3°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 83% — quite humid.
Average wind speed in December is 1.6 m/s. The windiest December on record averaged 1.9 m/s (1983).
The wettest December on record was 2015 with 344 mm. On average, December sees 128 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 Montgomery 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.
