December is one of the warmer months of the year in Toowoomba, with average highs near 30.9°C and lows around 16.9°C (mean 23.9°C). It is a relatively wet time of year, averaging 98 mm of rainfall and 64% relative humidity across the period.
December is one of the warmer months of the year in Toowoomba. Across 45 years of records, the warmest December in Toowoomba was 2019 — when the month averaged 26.6°C — while the coldest were 1983 and 1999 at 20.9°C. Typical December days reach 30.9°C with nights near 16.9°C. The long-term trend is warming, about 0.3°C per decade.
December is a relatively wet time of year in Toowoomba, averaging 98 mm of rainfall. The wettest December on record was 2010 with 325 mm, while the driest was 2019 at 26 mm.
Relative humidity in Toowoomba during December averages 64%. The most humid December was 2010 at 82%, and the least humid was 2019 at 47%.
December receives about 7.2 kWh/m²/day of solar energy in Toowoomba. The sunniest December was 2019 at 8.2 kWh/m²/day, and the cloudiest was 2010 at 5.4.
Average wind speed in Toowoomba during December is 2.6 m/s. The windiest December was 1988 at 3.4 m/s, while the calmest was 2021 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.5°C | 23.5°C | 24.0°C | 24.1°C | 24.4°C | +0.9°C |
| Avg High | 30.5°C | 30.5°C | 31.0°C | 31.1°C | 31.3°C | +0.8°C |
| Avg Low | 16.4°C | 16.5°C | 17.2°C | 17.1°C | 17.6°C | +1.2°C |
| Avg Rain | 100 mm | 104 mm | 98 mm | 100 mm | 80 mm | -19 mm |
December temperatures in Toowoomba have risen by about 0.7°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 8.3°C (2010) to a record high of 41.6°C (1990).
Rainfall in December is a relatively wet time of year, averaging 98 mm, with a wettest year of 325 mm.
A good time to visit Toowoomba
December is a good time to visit Toowoomba, with days averaging 30.9°C and nights around 16.9°C (mean 23.9°C, warmer than Toowoomba's yearly average) and higher rainfall. November and March 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 | 32.5°C | 24.9°C | 17.2°C | 37.9°C | 12.2°C | 38 mm | 58% | 2.4 m/s | — |
| 2024 | 31.3°C | 24.9°C | 18.5°C | 36.6°C | 13.8°C | 131 mm | 70% | 2.4 m/s | 7.2 |
| 2023 | 32.9°C | 26.0°C | 19.0°C | 37.0°C | 15.4°C | 115 mm | 64% | 2.3 m/s | 7.5 |
| 2022 | 30.6°C | 23.0°C | 15.4°C | 37.1°C | 10.8°C | 44 mm | 57% | 2.9 m/s | 7.3 |
| 2021 | 28.6°C | 22.7°C | 16.8°C | 34.0°C | 12.0°C | 64 mm | 72% | 2.1 m/s | 7.4 |
| 2020 | 31.7°C | 25.1°C | 18.6°C | 40.6°C | 15.0°C | 91 mm | 64% | 2.8 m/s | 6.6 |
| 2019 🔥 | 35.2°C | 26.6°C | 18.1°C | 40.0°C | 13.7°C | 26 mm | 47% | 2.9 m/s | 8.2 |
| 2018 | 32.5°C | 24.9°C | 17.3°C | 38.3°C | 13.5°C | 69 mm | 59% | 3.1 m/s | 7.8 |
| 2017 | 32.2°C | 25.0°C | 17.9°C | 37.9°C | 12.0°C | 86 mm | 62% | 2.5 m/s | 7.5 |
| 2016 | 33.4°C | 25.6°C | 17.8°C | 38.8°C | 14.0°C | 40 mm | 59% | 2.7 m/s | 7.5 |
| 2015 | 30.0°C | 23.2°C | 16.4°C | 35.9°C | 12.2°C | 69 mm | 64% | 2.6 m/s | 7.1 |
| 2014 | 30.4°C | 24.1°C | 17.9°C | 36.2°C | 13.5°C | 161 mm | 68% | 2.3 m/s | 6.5 |
| 2013 | 32.1°C | 24.0°C | 15.9°C | 40.4°C | 10.3°C | 39 mm | 58% | 2.4 m/s | 7.8 |
| 2012 | 32.2°C | 25.0°C | 17.7°C | 39.6°C | 12.4°C | 83 mm | 59% | 2.6 m/s | 7.3 |
| 2011 | 27.2°C | 21.1°C | 15.1°C | 32.9°C | 11.4°C | 100 mm | 70% | 2.8 m/s | 6.3 |
| 2010 🌧️ | 25.8°C | 21.2°C | 16.7°C | 30.3°C | 8.3°C | 325 mm | 82% | 2.8 m/s | 5.4 |
| 2009 | 32.3°C | 25.5°C | 18.7°C | 39.9°C | 13.9°C | 99 mm | 61% | 2.5 m/s | 6.6 |
| 2008 | 30.4°C | 23.7°C | 17.0°C | 35.5°C | 11.9°C | 96 mm | 66% | 2.5 m/s | 7.2 |
| 2007 | 28.1°C | 22.5°C | 16.9°C | 33.0°C | 14.5°C | 100 mm | 74% | 2.7 m/s | 6.3 |
| 2006 | 29.6°C | 22.3°C | 15.1°C | 35.1°C | 11.2°C | 69 mm | 62% | 2.9 m/s | 7 |
| 2005 | 33.7°C | 25.9°C | 18.2°C | 39.2°C | 11.1°C | 69 mm | 58% | 2.4 m/s | 8.1 |
| 2004 | 30.0°C | 23.5°C | 17.1°C | 36.6°C | 10.9°C | 124 mm | 67% | 2.5 m/s | 7 |
| 2003 | 30.5°C | 23.7°C | 17.0°C | 38.3°C | 12.8°C | 134 mm | 68% | 2.5 m/s | 7.3 |
| 2002 | 31.3°C | 23.7°C | 16.2°C | 39.0°C | 10.6°C | 112 mm | 58% | 2.7 m/s | 7.7 |
| 2001 | 32.2°C | 24.9°C | 17.6°C | 38.5°C | 13.9°C | 100 mm | 60% | 2.5 m/s | 7.2 |
| 2000 | 31.7°C | 24.7°C | 17.7°C | 38.0°C | 13.8°C | 76 mm | 61% | 2.5 m/s | 7 |
| 1999 | 27.3°C | 20.9°C | 14.4°C | 34.9°C | 11.8°C | 144 mm | 69% | 2.9 m/s | 7.3 |
| 1998 | 31.1°C | 24.2°C | 17.3°C | 37.5°C | 11.1°C | 73 mm | 64% | 2.6 m/s | 7.4 |
| 1997 | 32.7°C | 25.8°C | 18.8°C | 39.2°C | 13.9°C | 93 mm | 63% | 2.4 m/s | 7.3 |
| 1996 | 30.7°C | 23.6°C | 16.5°C | 39.6°C | 11.8°C | 118 mm | 64% | 2.7 m/s | 7.2 |
| 1995 | 28.6°C | 21.9°C | 15.2°C | 33.1°C | 11.6°C | 160 mm | 68% | 2.5 m/s | 7.4 |
| 1994 | 31.4°C | 23.8°C | 16.1°C | 39.1°C | 12.8°C | 52 mm | 59% | 2.9 m/s | 7.6 |
| 1993 | 30.1°C | 22.7°C | 15.3°C | 37.4°C | 9.6°C | 105 mm | 59% | 2.9 m/s | 7.4 |
| 1992 | 30.4°C | 23.5°C | 16.5°C | 36.9°C | 12.2°C | 58 mm | 62% | 2.7 m/s | 7 |
| 1991 | 29.0°C | 22.4°C | 15.9°C | 33.6°C | 12.8°C | 183 mm | 69% | 2.7 m/s | 7.6 |
| 1990 | 34.1°C | 26.4°C | 18.7°C | 41.6°C | 14.9°C | 55 mm | 57% | 2.7 m/s | 7.2 |
| 1989 | 30.1°C | 23.0°C | 15.8°C | 35.6°C | 11.6°C | 86 mm | 65% | 2.6 m/s | 7.6 |
| 1988 | 30.4°C | 23.9°C | 17.4°C | 34.2°C | 13.8°C | 116 mm | 69% | 3.4 m/s | 6.9 |
| 1987 | 30.1°C | 23.3°C | 16.5°C | 34.8°C | 9.8°C | 83 mm | 65% | 2.6 m/s | 7.6 |
| 1986 | 30.8°C | 23.2°C | 15.6°C | 38.3°C | 9.6°C | 52 mm | 60% | 2.8 m/s | 7.7 |
| 1985 | 31.5°C | 24.1°C | 16.7°C | 39.7°C | 12.6°C | 117 mm | 61% | 2.4 m/s | 7.2 |
| 1984 | 32.1°C | 24.5°C | 16.9°C | 37.1°C | 11.8°C | 80 mm | 57% | 2.6 m/s | 6.9 |
| 1983 ❄️ | 27.5°C | 20.9°C | 14.3°C | 34.5°C | 10.8°C | 82 mm | 72% | 2.6 m/s | — |
| 1982 | 31.2°C | 24.0°C | 16.8°C | 36.9°C | 13.8°C | 128 mm | 61% | 2.4 m/s | — |
| 1981 | 31.2°C | 24.6°C | 18.0°C | 38.9°C | 14.3°C | 154 mm | 68% | 2.5 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 30.9°C with lows near 16.9°C (mean 23.9°C), based on 45 years of NASA POWER data.
December averages 98 mm of rainfall in Toowoomba, a relatively wet time of year. The wettest on record was 325 mm in 2010.
The hottest December reached 41.6°C in 1990. The coldest dipped to 8.3°C in 2010.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 0.7°C. Daytime highs moved from 30.7°C to 31.2°C and overnight lows from 16.5°C to 17.4°C over the same span.
December is one of the warmer months of the year in Toowoomba and a relatively wet time of year, so plan for around 30.9°C daytime highs and 16.9°C at night.
Not quite — December is the 10th coolest month in Toowoomba, averaging 23.9°C.
For December in Toowoomba, pack light, breathable clothing and sun protection, with typical highs of 30.9°C and lows of 16.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 64% — moderately humid.
Average wind speed in December is 2.6 m/s. The windiest December on record averaged 3.4 m/s (1988).
The wettest December on record was 2010 with 325 mm. On average, December sees 98 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 Toowoomba 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.
