December is one of the warmer months of the year in Traralgon, with average highs near 23.6°C and lows around 10.5°C (mean 17.1°C). It is about average for rainfall, averaging 79 mm of rainfall and 65% relative humidity across the period.
December is one of the warmer months of the year in Traralgon. Across 45 years of records, the warmest December in Traralgon was 2018 — when the month averaged 20.5°C — while the coldest was 1995 at 14°C. Typical December days reach 23.6°C with nights near 10.5°C. The long-term trend is warming, about 0.5°C per decade.
December is about average for rainfall in Traralgon, averaging 79 mm of rainfall. The wettest December on record was 1985 with 174 mm, while the driest was 2019 at 21 mm.
Relative humidity in Traralgon during December averages 65%. The most humid December was 1992 at 81%, and the least humid was 2015 at 53%.
December receives about 6.7 kWh/m²/day of solar energy in Traralgon. The sunniest December was 2015 at 7.5 kWh/m²/day, and the cloudiest was 2001 at 5.6.
Average wind speed in Traralgon during December is 0 m/s. The windiest Decembers were 2015, 2018 and 2019, among others at 0.1 m/s, while the calmest were 2023, 2024 and 2025, among others at 0 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 16.1°C | 16.6°C | 17.2°C | 18.0°C | 17.4°C | +1.3°C |
| Avg High | 22.3°C | 22.9°C | 24.0°C | 24.8°C | 24.1°C | +1.8°C |
| Avg Low | 10.0°C | 10.2°C | 10.5°C | 11.3°C | 10.7°C | +0.7°C |
| Avg Rain | 88 mm | 86 mm | 74 mm | 77 mm | 65 mm | -23 mm |
December temperatures in Traralgon have risen by about 1.4°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 2.9°C (1994) to a record high of 40.7°C (2019).
Rainfall in December is about average for rainfall, averaging 79 mm, with a wettest year of 174 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.7°C per decade while lows rose 0.3°C per decade, widening the gap between day and night.
One of the best times to visit Traralgon
December is one of the best times to visit Traralgon. Expect days averaging 23.6°C and nights around 10.5°C (mean 17.1°C) — warmer than Traralgon's yearly average — with moderate rainfall (79 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 23.8°C | 17.0°C | 10.2°C | 35.3°C | 5.6°C | 47 mm | 60% | 0 m/s | — |
| 2024 | 26.6°C | 19.1°C | 11.6°C | 36.1°C | 7.9°C | 32 mm | 59% | 0 m/s | 7.4 |
| 2023 | 23.3°C | 17.7°C | 12.1°C | 32.2°C | 8.0°C | 130 mm | 73% | 0 m/s | 5.8 |
| 2022 | 22.7°C | 16.5°C | 10.3°C | 34.6°C | 4.4°C | 74 mm | 69% | 0 m/s | 7 |
| 2021 | 24.4°C | 17.4°C | 10.3°C | 35.5°C | 5.5°C | 53 mm | 65% | 0 m/s | 7 |
| 2020 | 23.6°C | 16.7°C | 9.9°C | 33.9°C | 4.9°C | 54 mm | 61% | 0 m/s | 6.7 |
| 2019 | 26.0°C | 18.6°C | 11.2°C | 40.7°C | 6.2°C | 21 mm | 55% | 0.1 m/s | 7.1 |
| 2018 🔥 | 27.3°C | 20.5°C | 13.6°C | 37.3°C | 7.8°C | 69 mm | 63% | 0.1 m/s | 6.6 |
| 2017 | 24.3°C | 18.0°C | 11.8°C | 33.1°C | 8.2°C | 158 mm | 68% | 0 m/s | 6.4 |
| 2016 | 26.0°C | 18.8°C | 11.7°C | 35.7°C | 6.8°C | 70 mm | 59% | 0 m/s | 6.8 |
| 2015 | 28.3°C | 20.3°C | 12.3°C | 38.9°C | 6.3°C | 32 mm | 53% | 0.1 m/s | 7.5 |
| 2014 | 24.5°C | 17.8°C | 11.1°C | 33.5°C | 6.0°C | 79 mm | 66% | 0 m/s | 6.4 |
| 2013 | 23.7°C | 17.0°C | 10.3°C | 33.9°C | 5.5°C | 77 mm | 66% | 0 m/s | 6.4 |
| 2012 | 24.0°C | 17.2°C | 10.4°C | 34.5°C | 5.6°C | 70 mm | 63% | 0 m/s | 6.9 |
| 2011 | 22.1°C | 16.1°C | 10.1°C | 30.1°C | 4.9°C | 81 mm | 71% | 0.1 m/s | 7 |
| 2010 | 21.7°C | 16.1°C | 10.5°C | 32.4°C | 4.7°C | 116 mm | 74% | 0.1 m/s | 6.4 |
| 2009 | 25.0°C | 17.5°C | 10.0°C | 35.2°C | 5.8°C | 65 mm | 61% | 0.1 m/s | 7 |
| 2008 | 21.2°C | 15.4°C | 9.6°C | 28.8°C | 4.8°C | 104 mm | 70% | 0.1 m/s | 6.5 |
| 2007 | 24.9°C | 18.2°C | 11.5°C | 36.1°C | 5.5°C | 106 mm | 64% | 0.1 m/s | 6.7 |
| 2006 | 24.3°C | 16.9°C | 9.4°C | 38.5°C | 5.3°C | 52 mm | 56% | 0.1 m/s | 7.2 |
| 2005 | 25.3°C | 18.2°C | 11.1°C | 39.5°C | 7.4°C | 86 mm | 57% | 0 m/s | 7.1 |
| 2004 | 22.0°C | 16.1°C | 10.2°C | 32.4°C | 5.9°C | 82 mm | 70% | 0.1 m/s | 6.7 |
| 2003 | 26.6°C | 19.4°C | 12.3°C | 36.9°C | 6.2°C | 63 mm | 60% | 0 m/s | 7.1 |
| 2002 | 24.5°C | 17.7°C | 10.8°C | 34.1°C | 5.5°C | 51 mm | 62% | 0 m/s | 6.5 |
| 2001 | 20.3°C | 14.6°C | 8.9°C | 30.7°C | 5.2°C | 81 mm | 70% | 0 m/s | 5.6 |
| 2000 | 25.4°C | 18.0°C | 10.7°C | 37.7°C | 5.5°C | 51 mm | 57% | 0.1 m/s | 7.2 |
| 1999 | 23.4°C | 17.1°C | 10.7°C | 33.8°C | 5.9°C | 102 mm | 64% | 0.1 m/s | 6.4 |
| 1998 | 23.6°C | 17.2°C | 10.8°C | 36.3°C | 6.6°C | 109 mm | 67% | 0 m/s | 6.7 |
| 1997 | 25.5°C | 18.3°C | 11.0°C | 33.4°C | 6.3°C | 24 mm | 58% | 0 m/s | 6.9 |
| 1996 | 21.8°C | 15.1°C | 8.3°C | 32.2°C | 3.9°C | 46 mm | 65% | 0.1 m/s | 6.4 |
| 1995 ❄️ | 19.9°C | 14.0°C | 8.0°C | 30.8°C | 3.7°C | 97 mm | 73% | 0.1 m/s | 6.5 |
| 1994 | 27.3°C | 19.3°C | 11.2°C | 35.8°C | 2.9°C | 25 mm | 55% | 0.1 m/s | 7.4 |
| 1993 | 20.9°C | 15.1°C | 9.3°C | 28.4°C | 4.1°C | 121 mm | 73% | 0.1 m/s | 6.4 |
| 1992 | 20.7°C | 16.3°C | 11.8°C | 26.2°C | 4.8°C | 145 mm | 81% | 0.1 m/s | 5.9 |
| 1991 | 21.4°C | 15.5°C | 9.6°C | 31.5°C | 3.7°C | 137 mm | 71% | 0.1 m/s | 6.6 |
| 1990 | 24.3°C | 17.9°C | 11.5°C | 34.5°C | 7.5°C | 56 mm | 64% | 0 m/s | 6.6 |
| 1989 | 23.6°C | 17.0°C | 10.4°C | 32.1°C | 6.2°C | 62 mm | 66% | 0 m/s | 7.2 |
| 1988 | 23.5°C | 17.5°C | 11.5°C | 33.7°C | 6.3°C | 114 mm | 72% | 0.1 m/s | 6.3 |
| 1987 | 22.1°C | 15.4°C | 8.7°C | 32.8°C | 3.6°C | 87 mm | 66% | 0.1 m/s | 6.9 |
| 1986 | 20.6°C | 14.8°C | 9.0°C | 29.6°C | 5.6°C | 131 mm | 71% | 0 m/s | 6.5 |
| 1985 🌧️ | 19.6°C | 15.1°C | 10.6°C | 24.3°C | 5.8°C | 174 mm | 80% | 0 m/s | 6.2 |
| 1984 | 20.4°C | 14.8°C | 9.2°C | 28.6°C | 6.1°C | 92 mm | 68% | 0 m/s | 6.3 |
| 1983 | 22.6°C | 16.4°C | 10.2°C | 29.9°C | 6.3°C | 26 mm | 68% | 0.1 m/s | — |
| 1982 | 24.8°C | 17.5°C | 10.2°C | 34.8°C | 5.3°C | 59 mm | 57% | 0 m/s | — |
| 1981 | 23.4°C | 16.7°C | 10.1°C | 33.4°C | 6.5°C | 49 mm | 62% | 0.1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 23.6°C with lows near 10.5°C (mean 17.1°C), based on 45 years of NASA POWER data.
December averages 79 mm of rainfall in Traralgon, about average for rainfall. The wettest on record was 174 mm in 1985.
The hottest December reached 40.7°C in 2019. The coldest dipped to 2.9°C in 1994.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.4°C. Daytime highs moved from 22.2°C to 24.2°C and overnight lows from 10.1°C to 10.9°C over the same span.
December is one of the warmer months of the year in Traralgon and about average for rainfall, so plan for around 23.6°C daytime highs and 10.5°C at night.
Not quite — December is the 9th coolest month in Traralgon, averaging 17.1°C.
For December in Traralgon, pack light layers you can adjust through the day, with typical highs of 23.6°C and lows of 10.5°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 65% — moderately humid.
Average wind speed in December is 0 m/s. The windiest December on record averaged 0.1 m/s (1981).
The wettest December on record was 1985 with 174 mm. On average, December sees 79 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 Traralgon 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.
