December is one of the cooler months of the year in Milton, with average highs near 17.2°C and lows around 9.1°C (mean 13.2°C). It is about average for rainfall, averaging 121 mm of rainfall and 83% relative humidity across the period.
December is one of the cooler months of the year in Milton. Across 45 years of records, the warmest December in Milton was 2015 — when the month averaged 17.3°C — while the coldest was 1989 at 8.2°C. Typical December days reach 17.2°C with nights near 9.1°C. The long-term trend is warming, about 0.5°C per decade.
December is about average for rainfall in Milton, averaging 121 mm of rainfall. The wettest December on record was 2018 with 286 mm, while the driest was 2010 at 31 mm.
Relative humidity in Milton during December averages 83%. The most humid December was 2021 at 90%, and the least humid was 2010 at 76%.
December receives about 2.7 kWh/m²/day of solar energy in Milton. The sunniest Decembers were 2003, 2010 and 2024, among others at 3.1 kWh/m²/day, and the cloudiest were 1986, 2009 and 2018 at 2.3.
Average wind speed in Milton during December is 3.2 m/s. The windiest December was 1982 at 4 m/s, while the calmest was 1984 at 2.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.3°C | 13.2°C | 12.4°C | 14.0°C | 14.1°C | +1.8°C |
| Avg High | 16.2°C | 17.1°C | 16.7°C | 18.1°C | 18.3°C | +2.1°C |
| Avg Low | 8.4°C | 9.2°C | 8.2°C | 10.0°C | 10.0°C | +1.6°C |
| Avg Rain | 130 mm | 95 mm | 128 mm | 144 mm | 104 mm | -26 mm |
December temperatures in Milton have risen by about 1.7°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -9.6°C (1989) to a record high of 25.8°C (2022).
Rainfall in December is about average for rainfall, averaging 121 mm, with a wettest year of 286 mm.
A quieter season to visit Milton
If your dates are flexible, the more temperate months of October and May tend to be the most comfortable for visiting Milton. That said, December — with days averaging 17.2°C and nights around 9.1°C (mean 13.2°C) and higher rainfall (121 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 | 18.0°C | 13.5°C | 9.1°C | 23.4°C | -0.4°C | 115 mm | 83% | 2.9 m/s | — |
| 2024 | 18.5°C | 14.0°C | 9.4°C | 23.7°C | 2.5°C | 115 mm | 81% | 3.1 m/s | 3.1 |
| 2023 | 17.2°C | 13.3°C | 9.4°C | 23.5°C | 2.9°C | 127 mm | 82% | 3.4 m/s | 2.8 |
| 2022 | 18.5°C | 14.5°C | 10.5°C | 25.8°C | -3.5°C | 124 mm | 83% | 2.9 m/s | 2.6 |
| 2021 | 20.6°C | 17.2°C | 13.7°C | 24.6°C | 4.9°C | 71 mm | 90% | 2.7 m/s | 2.6 |
| 2020 | 17.0°C | 12.3°C | 7.7°C | 22.4°C | 0.0°C | 74 mm | 81% | 3.1 m/s | 3 |
| 2019 | 18.5°C | 14.5°C | 10.5°C | 24.2°C | 2.4°C | 135 mm | 84% | 3.5 m/s | 2.6 |
| 2018 🌧️ | 17.1°C | 13.6°C | 10.2°C | 23.9°C | 2.5°C | 286 mm | 86% | 3.3 m/s | 2.3 |
| 2017 | 16.4°C | 12.7°C | 9.0°C | 23.6°C | 0.9°C | 76 mm | 87% | 3 m/s | 2.5 |
| 2016 | 19.2°C | 15.1°C | 11.1°C | 23.5°C | 1.9°C | 230 mm | 82% | 3.2 m/s | 2.6 |
| 2015 🔥 | 20.6°C | 17.3°C | 14.0°C | 24.6°C | 3.6°C | 238 mm | 88% | 3.2 m/s | 2.5 |
| 2014 | 18.8°C | 14.5°C | 10.3°C | 24.3°C | 4.9°C | 115 mm | 82% | 2.8 m/s | 2.8 |
| 2013 | 18.0°C | 13.9°C | 9.8°C | 23.9°C | 0.5°C | 147 mm | 86% | 3.2 m/s | 2.5 |
| 2012 | 19.3°C | 14.8°C | 10.2°C | 24.0°C | 0.4°C | 84 mm | 82% | 3.2 m/s | 2.7 |
| 2011 | 18.9°C | 14.5°C | 10.2°C | 23.4°C | 2.6°C | 99 mm | 81% | 3.2 m/s | 2.7 |
| 2010 | 13.8°C | 9.1°C | 4.4°C | 21.4°C | -1.6°C | 31 mm | 76% | 3.5 m/s | 3.1 |
| 2009 | 15.3°C | 11.5°C | 7.6°C | 22.7°C | 1.1°C | 283 mm | 86% | 3.7 m/s | 2.3 |
| 2008 | 18.4°C | 14.2°C | 10.0°C | 22.5°C | -0.1°C | 126 mm | 84% | 3.5 m/s | 2.7 |
| 2007 | 18.4°C | 14.5°C | 10.6°C | 23.1°C | 1.4°C | 150 mm | 87% | 2.9 m/s | 2.8 |
| 2006 | 18.3°C | 13.6°C | 8.9°C | 23.6°C | -2.3°C | 78 mm | 80% | 3.3 m/s | 2.8 |
| 2005 | 15.9°C | 11.7°C | 7.4°C | 23.4°C | 1.5°C | 100 mm | 80% | 3.5 m/s | 2.9 |
| 2004 | 15.7°C | 11.6°C | 7.5°C | 23.9°C | -1.5°C | 105 mm | 83% | 3.5 m/s | 2.9 |
| 2003 | 15.5°C | 10.9°C | 6.3°C | 20.8°C | 2.6°C | 109 mm | 82% | 3.6 m/s | 3.1 |
| 2002 | 15.7°C | 11.8°C | 8.0°C | 22.0°C | 1.5°C | 156 mm | 84% | 3.4 m/s | 2.9 |
| 2001 | 19.1°C | 14.7°C | 10.3°C | 24.4°C | 0.7°C | 67 mm | 78% | 2.9 m/s | 3.1 |
| 2000 | 14.3°C | 9.6°C | 5.0°C | 23.1°C | -3.5°C | 105 mm | 83% | 3.4 m/s | 2.8 |
| 1999 | 17.6°C | 13.0°C | 8.5°C | 23.0°C | 1.4°C | 117 mm | 77% | 3.2 m/s | 3 |
| 1998 | 18.8°C | 15.1°C | 11.4°C | 25.0°C | 3.8°C | 112 mm | 87% | 3.1 m/s | 2.6 |
| 1997 | 14.9°C | 11.3°C | 7.6°C | 21.2°C | 1.3°C | 138 mm | 85% | 3.3 m/s | 2.8 |
| 1996 | 17.5°C | 13.5°C | 9.4°C | 23.0°C | -2.1°C | 115 mm | 84% | 3.1 m/s | 2.9 |
| 1995 | 16.0°C | 11.9°C | 7.8°C | 23.1°C | -2.3°C | 93 mm | 85% | 3.2 m/s | 2.7 |
| 1994 | 17.2°C | 13.5°C | 9.9°C | 21.8°C | 3.4°C | 62 mm | 86% | 3 m/s | 2.8 |
| 1993 | 15.2°C | 11.2°C | 7.2°C | 22.1°C | 0.2°C | 96 mm | 82% | 3.2 m/s | 2.7 |
| 1992 | 17.4°C | 13.6°C | 9.7°C | 22.3°C | 4.0°C | 105 mm | 87% | 3.3 m/s | 2.4 |
| 1991 | 17.1°C | 13.3°C | 9.4°C | 24.0°C | 2.0°C | 52 mm | 83% | 3 m/s | 2.9 |
| 1990 | 19.1°C | 15.1°C | 11.1°C | 24.1°C | -1.0°C | 59 mm | 81% | 3.3 m/s | 2.5 |
| 1989 ❄️ | 12.4°C | 8.2°C | 4.1°C | 20.9°C | -9.6°C | 161 mm | 85% | 3.5 m/s | 2.7 |
| 1988 | 16.7°C | 12.7°C | 8.7°C | 22.2°C | 0.1°C | 51 mm | 84% | 3 m/s | 2.9 |
| 1987 | 17.5°C | 13.9°C | 10.3°C | 22.9°C | 0.3°C | 74 mm | 83% | 3.3 m/s | 2.5 |
| 1986 | 15.5°C | 12.2°C | 8.8°C | 22.7°C | 3.7°C | 117 mm | 88% | 3.2 m/s | 2.3 |
| 1985 | 14.7°C | 10.4°C | 6.1°C | 24.0°C | -3.4°C | 146 mm | 82% | 3.1 m/s | 3 |
| 1984 | 20.1°C | 16.3°C | 12.5°C | 23.3°C | -1.8°C | 45 mm | 87% | 2.5 m/s | 2.6 |
| 1983 | 14.7°C | 10.6°C | 6.4°C | 23.0°C | -6.4°C | 166 mm | 83% | 3.9 m/s | — |
| 1982 | 18.2°C | 14.8°C | 11.4°C | 24.7°C | 0.7°C | 246 mm | 87% | 4 m/s | — |
| 1981 | 15.9°C | 11.7°C | 7.4°C | 22.5°C | -3.9°C | 167 mm | 76% | 3.6 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 17.2°C with lows near 9.1°C (mean 13.2°C), based on 45 years of NASA POWER data.
December averages 121 mm of rainfall in Milton, about average for rainfall. The wettest on record was 286 mm in 2018.
The hottest December reached 25.8°C in 2022. The coldest dipped to -9.6°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.7°C. Daytime highs moved from 16.7°C to 18.6°C and overnight lows from 8.8°C to 10.4°C over the same span.
December is one of the cooler months of the year in Milton and about average for rainfall, so plan for around 17.2°C daytime highs and 9.1°C at night.
Not quite — December is the 2nd coolest month in Milton, averaging 13.2°C.
For December in Milton, pack light layers you can adjust through the day, with typical highs of 17.2°C and lows of 9.1°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 83% — quite humid.
Average wind speed in December is 3.2 m/s. The windiest December on record averaged 4 m/s (1982).
The wettest December on record was 2018 with 286 mm. On average, December sees 121 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 Milton 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.
