December is one of the cooler months of the year in Brunswick, with average highs near 17.3°C and lows around 13.2°C (mean 15.3°C). It is one of the drier months, averaging 77 mm of rainfall and 80% relative humidity across the period.
December is one of the cooler months of the year in Brunswick. Across 45 years of records, the warmest December in Brunswick was 2015 — when the month averaged 19.1°C — while the coldest were 1989 and 2010 at 11.2°C. Typical December days reach 17.3°C with nights near 13.2°C. The long-term December temperature trend is broadly flat.
December is one of the drier months in Brunswick, averaging 77 mm of rainfall. The wettest December on record was 1997 with 207 mm, while the driest was 1984 at 11 mm.
Relative humidity in Brunswick during December averages 80%. The most humid December was 2021 at 88%, and the least humid was 2010 at 70%.
December receives about 2.6 kWh/m²/day of solar energy in Brunswick. The sunniest Decembers were 2010, 2020 and 2024, among others at 2.9 kWh/m²/day, and the cloudiest was 1986 at 2.1.
Average wind speed in Brunswick during December is 3.6 m/s. The windiest December was 2010 at 4.6 m/s, while the calmest was 1984 at 2.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.1°C | 15.7°C | 14.9°C | 15.5°C | 15.1°C | 0°C |
| Avg High | 17.1°C | 17.7°C | 17.0°C | 17.5°C | 17.2°C | +0.1°C |
| Avg Low | 13.0°C | 13.8°C | 12.8°C | 13.4°C | 12.9°C | -0.1°C |
| Avg Rain | 101 mm | 70 mm | 89 mm | 68 mm | 48 mm | -53 mm |
December temperatures in Brunswick have stayed relatively stable across the record.
December has ranged from a record low of -3.1°C (1983) to a record high of 24.8°C (2022).
Rainfall in December is one of the drier months, averaging 77 mm, with a wettest year of 207 mm.
A good time to visit Brunswick
December is a good time to visit Brunswick, with days averaging 17.3°C and nights around 13.2°C (mean 15.3°C, cooler than Brunswick's yearly average) and moderate rainfall. October and April are marginally more temperate, but December still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 17.1°C | 14.6°C | 12.1°C | 22.3°C | 5.5°C | 34 mm | 81% | 3.1 m/s | — |
| 2024 | 16.6°C | 14.7°C | 12.9°C | 20.6°C | 8.7°C | 42 mm | 81% | 3.5 m/s | 2.9 |
| 2023 | 16.9°C | 15.3°C | 13.7°C | 22.1°C | 8.0°C | 102 mm | 82% | 3.6 m/s | 2.7 |
| 2022 | 17.2°C | 15.0°C | 12.9°C | 24.8°C | -0.9°C | 33 mm | 79% | 3.3 m/s | 2.6 |
| 2021 | 19.5°C | 17.4°C | 15.2°C | 23.6°C | 9.9°C | 35 mm | 88% | 2.8 m/s | 2.8 |
| 2020 | 16.0°C | 13.4°C | 10.8°C | 20.4°C | 3.3°C | 44 mm | 79% | 3.4 m/s | 2.9 |
| 2019 | 17.6°C | 15.7°C | 13.8°C | 22.5°C | 7.0°C | 109 mm | 85% | 3.7 m/s | 2.6 |
| 2018 | 16.5°C | 14.6°C | 12.7°C | 21.7°C | 7.0°C | 144 mm | 85% | 3.2 m/s | 2.3 |
| 2017 | 16.6°C | 14.5°C | 12.3°C | 21.7°C | 6.0°C | 41 mm | 82% | 3.5 m/s | 2.4 |
| 2016 | 18.5°C | 16.5°C | 14.5°C | 23.5°C | 9.5°C | 92 mm | 81% | 3 m/s | 2.6 |
| 2015 🔥 | 20.6°C | 19.1°C | 17.6°C | 24.2°C | 10.0°C | 43 mm | 87% | 2.8 m/s | 2.7 |
| 2014 | 17.1°C | 15.1°C | 13.1°C | 21.0°C | 8.2°C | 58 mm | 86% | 3 m/s | 2.5 |
| 2013 | 18.1°C | 16.1°C | 14.0°C | 22.6°C | 8.1°C | 60 mm | 84% | 3.1 m/s | 2.6 |
| 2012 | 17.8°C | 15.5°C | 13.3°C | 21.9°C | 6.4°C | 57 mm | 82% | 3.1 m/s | 2.5 |
| 2011 | 18.4°C | 16.4°C | 14.4°C | 22.1°C | 9.1°C | 48 mm | 81% | 3.5 m/s | 2.8 |
| 2010 | 14.1°C | 11.2°C | 8.2°C | 20.4°C | 0.5°C | 23 mm | 70% | 4.6 m/s | 2.9 |
| 2009 | 17.5°C | 15.4°C | 13.4°C | 22.9°C | 6.6°C | 182 mm | 81% | 4.3 m/s | 2.2 |
| 2008 | 17.7°C | 15.4°C | 13.2°C | 22.5°C | 5.5°C | 19 mm | 82% | 3.1 m/s | 2.8 |
| 2007 | 18.8°C | 16.7°C | 14.5°C | 22.8°C | 5.3°C | 96 mm | 82% | 2.9 m/s | 2.7 |
| 2006 | 18.3°C | 16.7°C | 15.0°C | 23.1°C | 5.8°C | 83 mm | 83% | 3 m/s | 2.5 |
| 2005 | 15.5°C | 13.4°C | 11.2°C | 20.2°C | 7.5°C | 143 mm | 77% | 4.3 m/s | 2.7 |
| 2004 | 16.2°C | 14.1°C | 12.0°C | 22.9°C | 2.3°C | 62 mm | 78% | 4 m/s | 2.9 |
| 2003 | 16.2°C | 13.8°C | 11.4°C | 20.6°C | 5.3°C | 45 mm | 74% | 3.9 m/s | 2.9 |
| 2002 | 15.7°C | 13.5°C | 11.3°C | 19.3°C | 5.9°C | 146 mm | 80% | 3.8 m/s | 2.6 |
| 2001 | 19.4°C | 17.7°C | 16.0°C | 23.3°C | 7.3°C | 38 mm | 77% | 3.4 m/s | 2.8 |
| 2000 | 14.5°C | 12.1°C | 9.7°C | 21.4°C | 0.0°C | 75 mm | 78% | 3.8 m/s | 2.6 |
| 1999 | 17.1°C | 15.0°C | 12.9°C | 20.9°C | 5.5°C | 47 mm | 75% | 3.6 m/s | 2.7 |
| 1998 | 20.0°C | 18.0°C | 16.0°C | 24.4°C | 9.0°C | 34 mm | 82% | 3.5 m/s | 2.5 |
| 1997 🌧️ | 15.8°C | 13.6°C | 11.5°C | 21.5°C | 4.9°C | 207 mm | 84% | 4 m/s | 2.5 |
| 1996 | 17.5°C | 15.6°C | 13.8°C | 21.8°C | 2.9°C | 44 mm | 80% | 3.8 m/s | 2.8 |
| 1995 | 16.6°C | 14.5°C | 12.5°C | 21.7°C | 4.6°C | 37 mm | 77% | 3.8 m/s | 2.6 |
| 1994 | 18.4°C | 16.7°C | 15.0°C | 22.2°C | 9.8°C | 118 mm | 85% | 4.2 m/s | 2.4 |
| 1993 | 16.9°C | 14.7°C | 12.5°C | 22.2°C | 5.2°C | 74 mm | 77% | 4.5 m/s | 2.7 |
| 1992 | 18.2°C | 16.4°C | 14.6°C | 21.3°C | 8.4°C | 35 mm | 82% | 4.2 m/s | 2.2 |
| 1991 | 17.7°C | 15.9°C | 14.1°C | 22.4°C | 8.1°C | 59 mm | 80% | 3.3 m/s | 2.8 |
| 1990 | 18.5°C | 16.6°C | 14.7°C | 22.7°C | 8.8°C | 41 mm | 82% | 3 m/s | 2.4 |
| 1989 ❄️ | 13.7°C | 11.2°C | 8.8°C | 19.6°C | -1.0°C | 128 mm | 79% | 4.2 m/s | 2.6 |
| 1988 | 15.5°C | 13.6°C | 11.7°C | 19.4°C | 4.0°C | 44 mm | 77% | 3.2 m/s | 2.8 |
| 1987 | 19.0°C | 16.9°C | 14.9°C | 23.2°C | 7.0°C | 33 mm | 76% | 4.2 m/s | 2.7 |
| 1986 | 18.5°C | 17.0°C | 15.4°C | 22.8°C | 11.2°C | 180 mm | 83% | 4.3 m/s | 2.1 |
| 1985 | 16.2°C | 13.9°C | 11.6°C | 23.5°C | -0.2°C | 65 mm | 75% | 4.2 m/s | 2.9 |
| 1984 | 19.4°C | 17.4°C | 15.4°C | 22.7°C | 3.3°C | 11 mm | 82% | 2.6 m/s | 2.8 |
| 1983 | 16.0°C | 13.7°C | 11.3°C | 22.4°C | -3.1°C | 158 mm | 81% | 4.2 m/s | — |
| 1982 | 19.6°C | 17.9°C | 16.2°C | 23.1°C | 8.2°C | 123 mm | 81% | 4 m/s | — |
| 1981 | 16.2°C | 13.9°C | 11.7°C | 21.6°C | 2.5°C | 169 mm | 75% | 4.1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 17.3°C with lows near 13.2°C (mean 15.3°C), based on 45 years of NASA POWER data.
December averages 77 mm of rainfall in Brunswick, one of the drier months. The wettest on record was 207 mm in 1997.
The hottest December reached 24.8°C in 2022. The coldest dipped to -3.1°C in 1983.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have held steady by about 0°C. Daytime highs moved from 17.5°C to 17.5°C and overnight lows from 13.2°C to 13.4°C over the same span.
December is one of the cooler months of the year in Brunswick and one of the drier months, so plan for around 17.3°C daytime highs and 13.2°C at night.
Not quite — December is the 3rd coolest month in Brunswick, averaging 15.3°C.
For December in Brunswick, pack light layers you can adjust through the day, with typical highs of 17.3°C and lows of 13.2°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 80% — quite humid.
Average wind speed in December is 3.6 m/s. The windiest December on record averaged 4.6 m/s (2010).
The wettest December on record was 1997 with 207 mm. On average, December sees 77 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 Brunswick 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.
