December is one of the warmer months of the year in Woomera, with average highs near 34.7°C and lows around 17.8°C (mean 26.3°C). It is about average for rainfall, averaging 16 mm of rainfall and 33% relative humidity across the period.
December is one of the warmer months of the year in Woomera. Across 45 years of records, the warmest December in Woomera was 2019 — when the month averaged 30°C — while the coldest was 1992 at 22.8°C. Typical December days reach 34.7°C with nights near 17.8°C. The long-term trend is warming, about 0.3°C per decade.
December is about average for rainfall in Woomera, averaging 16 mm of rainfall. The wettest December on record was 1992 with 106 mm, while the driest were 2016, 2017 and 2018 at 0 mm.
Relative humidity in Woomera during December averages 33%. The most humid December was 1992 at 54%, and the least humid was 2019 at 25%.
December receives about 7.8 kWh/m²/day of solar energy in Woomera. The sunniest December was 2012 at 8.5 kWh/m²/day, and the cloudiest was 1992 at 6.8.
Average wind speed in Woomera during December is 4 m/s. The windiest December was 1985 at 4.7 m/s, while the calmest were 1983 and 2003 at 3.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.0°C | 25.7°C | 26.1°C | 27.2°C | 26.4°C | +0.4°C |
| Avg High | 34.6°C | 33.9°C | 34.5°C | 35.6°C | 35.0°C | +0.4°C |
| Avg Low | 17.5°C | 17.4°C | 17.6°C | 18.8°C | 17.9°C | +0.4°C |
| Avg Rain | 18 mm | 23 mm | 16 mm | 8 mm | 10 mm | -8 mm |
December temperatures in Woomera have risen by about 0.5°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 9.2°C (1986) to a record high of 48.6°C (2019).
Rainfall in December is about average for rainfall, averaging 16 mm, with a wettest year of 106 mm.
A good time to visit Woomera
December is a good time to visit Woomera, with days averaging 34.7°C and nights around 17.8°C (mean 26.3°C, warmer than Woomera's yearly average) and low rainfall. November 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 | 36.4°C | 27.3°C | 18.2°C | 44.3°C | 11.8°C | 7 mm | 26% | 4.2 m/s | — |
| 2024 | 36.1°C | 27.4°C | 18.6°C | 44.2°C | 13.8°C | 17 mm | 34% | 3.9 m/s | 8 |
| 2023 | 35.1°C | 26.5°C | 17.9°C | 45.7°C | 12.8°C | 2 mm | 32% | 4.3 m/s | 7.8 |
| 2022 | 34.2°C | 26.0°C | 17.8°C | 41.6°C | 11.5°C | 14 mm | 33% | 3.9 m/s | 7.8 |
| 2021 | 34.5°C | 26.0°C | 17.6°C | 42.7°C | 10.3°C | 10 mm | 33% | 3.8 m/s | 8.1 |
| 2020 | 33.5°C | 25.4°C | 17.4°C | 39.9°C | 11.7°C | 12 mm | 33% | 4.1 m/s | 7.7 |
| 2019 🔥 | 38.9°C | 30.0°C | 21.1°C | 48.6°C | 11.3°C | 1 mm | 25% | 4 m/s | 8.2 |
| 2018 | 36.8°C | 28.3°C | 19.8°C | 45.8°C | 10.4°C | 0 mm | 29% | 4.1 m/s | 7.7 |
| 2017 | 35.5°C | 26.9°C | 18.3°C | 46.3°C | 11.7°C | 0 mm | 30% | 4.2 m/s | 7.8 |
| 2016 | 36.0°C | 28.1°C | 20.2°C | 42.9°C | 12.6°C | 0 mm | 33% | 4.1 m/s | 7.3 |
| 2015 | 36.4°C | 28.1°C | 19.9°C | 45.3°C | 11.3°C | 13 mm | 28% | 3.8 m/s | 7.6 |
| 2014 | 34.9°C | 26.4°C | 17.8°C | 44.4°C | 13.7°C | 13 mm | 32% | 3.9 m/s | 8 |
| 2013 | 35.3°C | 26.9°C | 18.4°C | 44.1°C | 11.4°C | 8 mm | 29% | 3.8 m/s | 7.7 |
| 2012 | 35.8°C | 27.0°C | 18.3°C | 43.7°C | 11.4°C | 5 mm | 28% | 4.1 m/s | 8.5 |
| 2011 | 34.0°C | 25.8°C | 17.6°C | 43.3°C | 11.1°C | 18 mm | 33% | 3.8 m/s | 7.8 |
| 2010 | 32.7°C | 24.6°C | 16.4°C | 43.3°C | 9.7°C | 25 mm | 39% | 3.8 m/s | 7.9 |
| 2009 | 34.4°C | 25.6°C | 16.8°C | 42.5°C | 10.9°C | 9 mm | 34% | 3.7 m/s | 8.4 |
| 2008 | 32.4°C | 24.6°C | 16.8°C | 38.8°C | 10.7°C | 42 mm | 43% | 3.8 m/s | 7.6 |
| 2007 | 34.9°C | 26.4°C | 17.9°C | 42.5°C | 10.9°C | 26 mm | 33% | 4 m/s | 7.9 |
| 2006 | 35.0°C | 26.6°C | 18.2°C | 42.5°C | 11.0°C | 7 mm | 27% | 4 m/s | 8.1 |
| 2005 | 35.6°C | 26.4°C | 17.2°C | 45.2°C | 10.6°C | 10 mm | 33% | 4.2 m/s | 8.1 |
| 2004 | 33.3°C | 25.0°C | 16.6°C | 42.0°C | 12.4°C | 17 mm | 35% | 4 m/s | 8 |
| 2003 | 36.8°C | 28.2°C | 19.6°C | 44.7°C | 13.1°C | 10 mm | 30% | 3.6 m/s | 7.9 |
| 2002 | 35.7°C | 26.7°C | 17.7°C | 43.8°C | 10.9°C | 5 mm | 27% | 4 m/s | 8 |
| 2001 | 30.9°C | 23.0°C | 15.2°C | 39.3°C | 10.8°C | 30 mm | 42% | 3.9 m/s | 7.7 |
| 2000 | 36.3°C | 28.0°C | 19.7°C | 42.8°C | 13.4°C | 8 mm | 28% | 3.7 m/s | 8 |
| 1999 | 33.2°C | 25.2°C | 17.2°C | 40.3°C | 12.4°C | 10 mm | 33% | 4.4 m/s | 7.6 |
| 1998 | 35.2°C | 26.7°C | 18.1°C | 42.7°C | 12.1°C | 12 mm | 31% | 3.9 m/s | 8 |
| 1997 | 36.3°C | 27.6°C | 18.9°C | 43.2°C | 14.1°C | 11 mm | 32% | 3.9 m/s | 8 |
| 1996 | 34.6°C | 25.8°C | 17.0°C | 44.0°C | 9.9°C | 25 mm | 33% | 4.3 m/s | 7.8 |
| 1995 | 33.0°C | 24.9°C | 16.7°C | 45.2°C | 9.4°C | 18 mm | 31% | 3.8 m/s | 7.6 |
| 1994 | 36.7°C | 27.7°C | 18.7°C | 45.1°C | 12.1°C | 5 mm | 26% | 4.1 m/s | 8.3 |
| 1993 | 32.3°C | 24.8°C | 17.3°C | 43.0°C | 10.6°C | 28 mm | 39% | 4.2 m/s | 7.3 |
| 1992 ❄️ 🌧️ | 29.8°C | 22.8°C | 15.7°C | 37.1°C | 12.0°C | 106 mm | 54% | 4.3 m/s | 6.8 |
| 1991 | 33.1°C | 24.7°C | 16.3°C | 42.9°C | 11.2°C | 0 mm | 33% | 4.1 m/s | 8 |
| 1990 | 35.2°C | 26.4°C | 17.6°C | 45.3°C | 11.4°C | 18 mm | 32% | 4.3 m/s | 7.8 |
| 1989 | 35.5°C | 26.8°C | 18.0°C | 45.7°C | 12.3°C | 9 mm | 29% | 3.8 m/s | 7.8 |
| 1988 | 33.9°C | 26.0°C | 18.0°C | 40.3°C | 11.8°C | 71 mm | 43% | 3.9 m/s | 7.4 |
| 1987 | 35.3°C | 26.7°C | 18.1°C | 42.8°C | 11.2°C | 13 mm | 30% | 4.3 m/s | 7.2 |
| 1986 | 32.7°C | 24.4°C | 16.1°C | 43.0°C | 9.2°C | 20 mm | 36% | 4.2 m/s | 8.1 |
| 1985 | 32.6°C | 23.9°C | 15.3°C | 42.1°C | 11.9°C | 3 mm | 33% | 4.7 m/s | 7.9 |
| 1984 | 34.6°C | 25.9°C | 17.3°C | 42.7°C | 10.1°C | 1 mm | 28% | 4 m/s | 7.2 |
| 1983 | 35.7°C | 27.4°C | 19.0°C | 45.4°C | 10.1°C | 24 mm | 33% | 3.6 m/s | — |
| 1982 | 35.7°C | 27.2°C | 18.7°C | 42.0°C | 11.2°C | 11 mm | 28% | 4 m/s | — |
| 1981 | 35.3°C | 26.1°C | 16.9°C | 45.6°C | 10.7°C | 12 mm | 29% | 4.3 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 34.7°C with lows near 17.8°C (mean 26.3°C), based on 45 years of NASA POWER data.
December averages 16 mm of rainfall in Woomera, about average for rainfall. The wettest on record was 106 mm in 1992.
The hottest December reached 48.6°C in 2019. The coldest dipped to 9.2°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 0.5°C. Daytime highs moved from 34.8°C to 35.3°C and overnight lows from 17.4°C to 18°C over the same span.
December is one of the warmer months of the year in Woomera and about average for rainfall, so plan for around 34.7°C daytime highs and 17.8°C at night.
Not quite — December is the 10th coolest month in Woomera, averaging 26.3°C.
For December in Woomera, pack light, breathable clothing and sun protection, with typical highs of 34.7°C and lows of 17.8°C.
Relative humidity in December averages 33% — relatively dry.
Average wind speed in December is 4 m/s. The windiest December on record averaged 4.7 m/s (1985).
The wettest December on record was 1992 with 106 mm. On average, December sees 16 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 Woomera 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.
