December is one of the warmer months of the year in Bairnsdale, with average highs near 22.8°C and lows around 13.3°C (mean 18.1°C). It is about average for rainfall, averaging 67 mm of rainfall and 69% relative humidity across the period.
December is one of the warmer months of the year in Bairnsdale. Across 45 years of records, the warmest December in Bairnsdale was 2018 — when the month averaged 20.5°C — while the coldest was 1995 at 15.5°C. Typical December days reach 22.8°C with nights near 13.3°C. The long-term trend is warming, about 0.3°C per decade.
December is about average for rainfall in Bairnsdale, averaging 67 mm of rainfall. The wettest December on record was 1992 with 144 mm, while the driest was 2019 at 11 mm.
Relative humidity in Bairnsdale during December averages 69%. The most humid December was 1992 at 81%, and the least humid was 2019 at 61%.
December receives about 6.8 kWh/m²/day of solar energy in Bairnsdale. The sunniest Decembers were 1994 and 2000 at 7.7 kWh/m²/day, and the cloudiest were 1992, 2001 and 2023, among others at 6.
Average wind speed in Bairnsdale during December is 2.9 m/s. The windiest December was 1984 at 3.7 m/s, while the calmest was 1988 at 2.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.6°C | 17.7°C | 18.2°C | 18.8°C | 17.9°C | +0.3°C |
| Avg High | 22.2°C | 22.3°C | 23.1°C | 23.7°C | 22.4°C | +0.2°C |
| Avg Low | 12.9°C | 13.1°C | 13.3°C | 13.9°C | 13.5°C | +0.6°C |
| Avg Rain | 65 mm | 71 mm | 52 mm | 70 mm | 84 mm | +19 mm |
December temperatures in Bairnsdale have risen by about 0.4°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 7.8°C (1987) to a record high of 38.4°C (2019).
Rainfall in December is about average for rainfall, averaging 67 mm, with a wettest year of 144 mm.
One of the best times to visit Bairnsdale
December is one of the best times to visit Bairnsdale. Expect days averaging 22.8°C and nights around 13.3°C (mean 18.1°C) — warmer than Bairnsdale's yearly average — with moderate rainfall (67 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 | 22.6°C | 17.6°C | 12.7°C | 33.4°C | 9.4°C | 50 mm | 67% | 2.9 m/s | — |
| 2024 | 25.3°C | 20.0°C | 14.7°C | 35.2°C | 11.2°C | 33 mm | 65% | 2.8 m/s | 7.6 |
| 2023 | 21.4°C | 17.9°C | 14.4°C | 29.1°C | 10.5°C | 140 mm | 81% | 2.7 m/s | 6 |
| 2022 | 21.5°C | 17.1°C | 12.8°C | 31.8°C | 8.4°C | 106 mm | 73% | 2.7 m/s | 6.3 |
| 2021 | 21.2°C | 17.1°C | 13.0°C | 33.1°C | 10.8°C | 113 mm | 76% | 2.5 m/s | 6.5 |
| 2020 | 22.3°C | 17.7°C | 13.1°C | 31.6°C | 10.1°C | 65 mm | 67% | 3.1 m/s | 6.8 |
| 2019 | 24.1°C | 18.7°C | 13.3°C | 38.4°C | 9.3°C | 11 mm | 61% | 3 m/s | 7.3 |
| 2018 🔥 | 25.3°C | 20.5°C | 15.6°C | 35.3°C | 12.5°C | 77 mm | 69% | 2.7 m/s | 6.7 |
| 2017 | 23.7°C | 19.2°C | 14.6°C | 33.3°C | 10.5°C | 140 mm | 71% | 2.7 m/s | 6.4 |
| 2016 | 24.5°C | 19.3°C | 14.0°C | 32.4°C | 10.7°C | 41 mm | 66% | 2.7 m/s | 6.8 |
| 2015 | 25.1°C | 19.9°C | 14.6°C | 37.2°C | 9.8°C | 45 mm | 64% | 2.8 m/s | 7.4 |
| 2014 | 22.6°C | 18.3°C | 13.9°C | 29.8°C | 10.7°C | 141 mm | 74% | 2.8 m/s | 6.3 |
| 2013 | 23.8°C | 18.5°C | 13.2°C | 35.2°C | 9.0°C | 65 mm | 68% | 2.8 m/s | 7 |
| 2012 | 23.7°C | 18.5°C | 13.3°C | 33.7°C | 10.4°C | 46 mm | 65% | 3 m/s | 7.1 |
| 2011 | 21.2°C | 17.1°C | 13.0°C | 29.1°C | 9.3°C | 49 mm | 73% | 2.6 m/s | 6.5 |
| 2010 | 22.7°C | 18.1°C | 13.5°C | 33.1°C | 9.0°C | 89 mm | 71% | 3 m/s | 6.5 |
| 2009 | 23.8°C | 18.6°C | 13.4°C | 34.4°C | 9.4°C | 50 mm | 65% | 2.7 m/s | 7.3 |
| 2008 | 21.2°C | 16.9°C | 12.6°C | 29.7°C | 8.4°C | 81 mm | 74% | 2.8 m/s | 6.4 |
| 2007 | 23.5°C | 18.8°C | 14.1°C | 35.3°C | 9.7°C | 69 mm | 69% | 2.8 m/s | 6.6 |
| 2006 | 22.6°C | 17.7°C | 12.8°C | 35.7°C | 9.2°C | 20 mm | 62% | 3.1 m/s | 6.7 |
| 2005 | 24.9°C | 19.1°C | 13.4°C | 34.4°C | 11.1°C | 54 mm | 62% | 3.2 m/s | 7.4 |
| 2004 | 21.6°C | 17.4°C | 13.2°C | 28.7°C | 9.7°C | 73 mm | 72% | 3.1 m/s | 6.7 |
| 2003 | 24.9°C | 19.6°C | 14.3°C | 35.0°C | 10.8°C | 54 mm | 66% | 2.7 m/s | 7.3 |
| 2002 | 23.1°C | 18.3°C | 13.4°C | 34.0°C | 9.0°C | 26 mm | 67% | 3.2 m/s | 7.1 |
| 2001 | 20.5°C | 16.4°C | 12.2°C | 31.5°C | 8.9°C | 78 mm | 71% | 2.9 m/s | 6 |
| 2000 | 24.6°C | 19.3°C | 14.0°C | 34.3°C | 10.0°C | 20 mm | 62% | 3 m/s | 7.7 |
| 1999 | 22.9°C | 18.5°C | 14.0°C | 34.8°C | 10.2°C | 72 mm | 66% | 3 m/s | 6.4 |
| 1998 | 22.6°C | 17.9°C | 13.2°C | 35.9°C | 8.5°C | 79 mm | 72% | 3 m/s | 7 |
| 1997 | 23.8°C | 18.7°C | 13.7°C | 34.4°C | 10.5°C | 39 mm | 66% | 3 m/s | 7.6 |
| 1996 | 21.0°C | 16.3°C | 11.6°C | 30.7°C | 9.0°C | 40 mm | 67% | 2.9 m/s | 6.7 |
| 1995 ❄️ | 19.7°C | 15.5°C | 11.3°C | 29.0°C | 7.9°C | 80 mm | 73% | 2.9 m/s | 6.8 |
| 1994 | 24.3°C | 19.1°C | 13.9°C | 34.3°C | 8.9°C | 45 mm | 65% | 2.6 m/s | 7.7 |
| 1993 | 21.9°C | 17.3°C | 12.7°C | 30.0°C | 8.3°C | 77 mm | 70% | 3.2 m/s | 6.5 |
| 1992 🌧️ | 20.7°C | 17.1°C | 13.5°C | 26.0°C | 10.2°C | 144 mm | 81% | 2.9 m/s | 6 |
| 1991 | 21.5°C | 17.2°C | 12.9°C | 30.0°C | 8.7°C | 87 mm | 71% | 2.9 m/s | 6.2 |
| 1990 | 24.1°C | 18.9°C | 13.7°C | 33.3°C | 10.5°C | 53 mm | 67% | 3 m/s | 7.1 |
| 1989 | 23.5°C | 18.4°C | 13.3°C | 33.4°C | 10.4°C | 49 mm | 66% | 3.1 m/s | 7.2 |
| 1988 | 22.9°C | 18.5°C | 14.1°C | 30.9°C | 10.1°C | 86 mm | 75% | 2.3 m/s | 6.3 |
| 1987 | 21.5°C | 16.8°C | 12.1°C | 32.8°C | 7.8°C | 81 mm | 69% | 2.9 m/s | 6.7 |
| 1986 | 21.5°C | 16.8°C | 12.0°C | 30.8°C | 9.1°C | 68 mm | 68% | 3.1 m/s | 7 |
| 1985 | 20.8°C | 17.1°C | 13.3°C | 25.4°C | 10.6°C | 129 mm | 78% | 2.7 m/s | 6 |
| 1984 | 21.0°C | 16.5°C | 12.0°C | 30.6°C | 8.6°C | 50 mm | 67% | 3.7 m/s | 6.3 |
| 1983 | 22.7°C | 17.9°C | 13.0°C | 31.1°C | 9.8°C | 31 mm | 69% | 2.6 m/s | — |
| 1982 | 23.4°C | 18.2°C | 13.0°C | 32.1°C | 9.8°C | 47 mm | 62% | 2.8 m/s | — |
| 1981 | 22.4°C | 17.8°C | 13.2°C | 30.7°C | 10.8°C | 44 mm | 67% | 2.8 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 22.8°C with lows near 13.3°C (mean 18.1°C), based on 45 years of NASA POWER data.
December averages 67 mm of rainfall in Bairnsdale, about average for rainfall. The wettest on record was 144 mm in 1992.
The hottest December reached 38.4°C in 2019. The coldest dipped to 7.8°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 0.4°C. Daytime highs moved from 22.1°C to 22.4°C and overnight lows from 12.9°C to 13.5°C over the same span.
December is one of the warmer months of the year in Bairnsdale and about average for rainfall, so plan for around 22.8°C daytime highs and 13.3°C at night.
Not quite — December is the 9th coolest month in Bairnsdale, averaging 18.1°C.
For December in Bairnsdale, pack light layers you can adjust through the day, with typical highs of 22.8°C and lows of 13.3°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 69% — moderately humid.
Average wind speed in December is 2.9 m/s. The windiest December on record averaged 3.7 m/s (1984).
The wettest December on record was 1992 with 144 mm. On average, December sees 67 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 Bairnsdale 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.
