December is one of the warmer months of the year in Ceduna, with average highs near 30.3°C and lows around 15.5°C (mean 22.9°C). It is about average for rainfall, averaging 19 mm of rainfall and 51% relative humidity across the period.
December is one of the warmer months of the year in Ceduna. Across 45 years of records, the warmest December in Ceduna was 2019 — when the month averaged 26.6°C — while the coldest was 2001 at 19.5°C. Typical December days reach 30.3°C with nights near 15.5°C. The long-term trend is warming, about 0.3°C per decade.
December is about average for rainfall in Ceduna, averaging 19 mm of rainfall. The wettest December on record was 1992 with 96 mm, while the driest were 2016, 2017 and 2018 at 0 mm.
Relative humidity in Ceduna during December averages 51%. The most humid December was 1992 at 68%, and the least humid was 2019 at 44%.
December receives about 7.7 kWh/m²/day of solar energy in Ceduna. The sunniest Decembers were 2009 and 2012 at 8.4 kWh/m²/day, and the cloudiest was 1992 at 6.1.
Average wind speed in Ceduna during December is 4.4 m/s. The windiest Decembers were 1986 and 1999 at 4.8 m/s, while the calmest were 1997, 2008 and 2015 at 3.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 22.7°C | 22.1°C | 22.9°C | 23.9°C | 22.9°C | +0.2°C |
| Avg High | 30.1°C | 29.1°C | 30.4°C | 31.6°C | 30.4°C | +0.3°C |
| Avg Low | 15.3°C | 15.1°C | 15.4°C | 16.1°C | 15.5°C | +0.2°C |
| Avg Rain | 14 mm | 29 mm | 26 mm | 13 mm | 8 mm | -6 mm |
December temperatures in Ceduna have risen by about 0.4°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 8.7°C (1984) to a record high of 47.7°C (2019).
Rainfall in December is about average for rainfall, averaging 19 mm, with a wettest year of 96 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.5°C per decade while lows rose 0.2°C per decade, widening the gap between day and night.
One of the best times to visit Ceduna
December is one of the best times to visit Ceduna. Expect days averaging 30.3°C and nights around 15.5°C (mean 22.9°C) — warmer than Ceduna's yearly average — with low rainfall (19 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 | 32.3°C | 24.3°C | 16.2°C | 43.3°C | 12.5°C | 0 mm | 46% | 4.5 m/s | — |
| 2024 | 32.3°C | 24.5°C | 16.7°C | 42.2°C | 13.0°C | 7 mm | 50% | 4.3 m/s | 8.1 |
| 2023 | 29.1°C | 22.0°C | 14.9°C | 42.5°C | 11.3°C | 11 mm | 54% | 4.6 m/s | 7.4 |
| 2022 | 30.7°C | 23.1°C | 15.4°C | 42.7°C | 10.6°C | 4 mm | 50% | 4.4 m/s | 7.7 |
| 2021 | 29.2°C | 21.8°C | 14.3°C | 41.1°C | 10.2°C | 12 mm | 56% | 4.4 m/s | 8.1 |
| 2020 | 28.6°C | 21.9°C | 15.2°C | 40.6°C | 11.5°C | 14 mm | 52% | 4.7 m/s | 7.6 |
| 2019 🔥 | 35.0°C | 26.6°C | 18.1°C | 47.7°C | 10.0°C | 1 mm | 44% | 4.3 m/s | 7.9 |
| 2018 | 32.2°C | 24.5°C | 16.8°C | 46.0°C | 12.1°C | 0 mm | 48% | 4.6 m/s | 7.1 |
| 2017 | 31.0°C | 23.3°C | 15.7°C | 43.8°C | 10.7°C | 0 mm | 49% | 4.2 m/s | 7.9 |
| 2016 | 32.2°C | 24.4°C | 16.5°C | 42.1°C | 11.8°C | 0 mm | 49% | 4.4 m/s | 7.5 |
| 2015 | 33.7°C | 25.3°C | 16.9°C | 44.4°C | 9.9°C | 25 mm | 46% | 3.9 m/s | 8.1 |
| 2014 | 29.3°C | 22.2°C | 15.2°C | 38.2°C | 12.6°C | 12 mm | 55% | 4.2 m/s | 8 |
| 2013 | 31.3°C | 23.5°C | 15.7°C | 45.1°C | 10.3°C | 12 mm | 48% | 4.1 m/s | 7.7 |
| 2012 | 31.4°C | 23.5°C | 15.5°C | 40.1°C | 9.9°C | 2 mm | 48% | 4.2 m/s | 8.4 |
| 2011 | 30.7°C | 23.3°C | 15.9°C | 41.8°C | 10.1°C | 26 mm | 52% | 4.2 m/s | 7.8 |
| 2010 | 28.9°C | 22.0°C | 15.1°C | 43.5°C | 10.9°C | 50 mm | 57% | 4 m/s | 7.6 |
| 2009 | 31.3°C | 23.3°C | 15.3°C | 43.0°C | 11.3°C | 5 mm | 47% | 4.3 m/s | 8.4 |
| 2008 | 28.3°C | 21.5°C | 14.6°C | 35.9°C | 10.6°C | 86 mm | 60% | 3.9 m/s | 7.4 |
| 2007 | 30.8°C | 23.4°C | 15.9°C | 42.7°C | 11.1°C | 42 mm | 49% | 4.1 m/s | 7.7 |
| 2006 | 30.7°C | 23.1°C | 15.6°C | 42.4°C | 10.7°C | 4 mm | 47% | 4.6 m/s | 8 |
| 2005 | 30.7°C | 22.7°C | 14.7°C | 43.3°C | 9.1°C | 23 mm | 53% | 4.3 m/s | 8 |
| 2004 | 29.8°C | 22.6°C | 15.3°C | 42.1°C | 11.6°C | 7 mm | 51% | 4.5 m/s | 7.5 |
| 2003 | 32.9°C | 24.8°C | 16.8°C | 41.8°C | 11.3°C | 21 mm | 51% | 4.1 m/s | 7.9 |
| 2002 | 32.0°C | 24.0°C | 16.1°C | 44.2°C | 10.5°C | 16 mm | 45% | 4.6 m/s | 7.7 |
| 2001 ❄️ | 25.7°C | 19.5°C | 13.2°C | 40.4°C | 10.2°C | 52 mm | 63% | 4.2 m/s | 7.7 |
| 2000 | 32.1°C | 24.4°C | 16.6°C | 43.0°C | 11.2°C | 3 mm | 49% | 4.4 m/s | 8.1 |
| 1999 | 29.6°C | 22.6°C | 15.5°C | 40.0°C | 11.5°C | 6 mm | 50% | 4.8 m/s | 7.9 |
| 1998 | 30.6°C | 23.2°C | 15.9°C | 43.1°C | 11.5°C | 6 mm | 50% | 4.4 m/s | 8.1 |
| 1997 | 30.0°C | 22.7°C | 15.3°C | 37.6°C | 11.8°C | 54 mm | 57% | 3.9 m/s | 7.8 |
| 1996 | 29.4°C | 22.1°C | 14.9°C | 41.1°C | 11.3°C | 6 mm | 52% | 4.5 m/s | 7.9 |
| 1995 | 29.3°C | 22.4°C | 15.4°C | 40.5°C | 9.7°C | 13 mm | 50% | 4.6 m/s | 7.3 |
| 1994 | 32.6°C | 24.4°C | 16.2°C | 42.7°C | 10.6°C | 3 mm | 45% | 4.5 m/s | 7.8 |
| 1993 | 27.5°C | 21.2°C | 14.8°C | 37.9°C | 10.6°C | 35 mm | 57% | 4.4 m/s | 7.1 |
| 1992 🌧️ | 25.4°C | 19.8°C | 14.3°C | 38.6°C | 10.8°C | 96 mm | 68% | 4.6 m/s | 6.1 |
| 1991 | 27.5°C | 20.7°C | 13.9°C | 41.8°C | 10.1°C | 1 mm | 56% | 4.3 m/s | 7.7 |
| 1990 | 29.3°C | 22.1°C | 14.9°C | 42.4°C | 10.2°C | 66 mm | 55% | 4.4 m/s | 7.5 |
| 1989 | 31.6°C | 23.9°C | 16.2°C | 42.0°C | 11.8°C | 8 mm | 45% | 4.2 m/s | 8.2 |
| 1988 | 29.8°C | 22.8°C | 15.8°C | 42.3°C | 10.2°C | 27 mm | 56% | 4.7 m/s | 7.4 |
| 1987 | 30.5°C | 22.9°C | 15.3°C | 42.3°C | 9.2°C | 13 mm | 48% | 4.5 m/s | 7.4 |
| 1986 | 29.0°C | 21.6°C | 14.2°C | 43.4°C | 9.8°C | 13 mm | 51% | 4.8 m/s | 7.8 |
| 1985 | 26.8°C | 20.4°C | 13.9°C | 41.0°C | 11.3°C | 23 mm | 56% | 4.7 m/s | 7.7 |
| 1984 | 30.2°C | 22.8°C | 15.4°C | 43.3°C | 8.7°C | 12 mm | 50% | 4.1 m/s | 7.3 |
| 1983 | 32.2°C | 24.5°C | 16.9°C | 43.5°C | 10.7°C | 11 mm | 48% | 4.1 m/s | — |
| 1982 | 31.4°C | 23.7°C | 16.0°C | 40.8°C | 10.7°C | 15 mm | 47% | 4 m/s | — |
| 1981 | 29.6°C | 22.0°C | 14.3°C | 44.5°C | 10.5°C | 3 mm | 50% | 4.3 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 30.3°C with lows near 15.5°C (mean 22.9°C), based on 45 years of NASA POWER data.
December averages 19 mm of rainfall in Ceduna, about average for rainfall. The wettest on record was 96 mm in 1992.
The hottest December reached 47.7°C in 2019. The coldest dipped to 8.7°C in 1984.
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 30°C to 30.7°C and overnight lows from 15.3°C to 15.5°C over the same span.
December is one of the warmer months of the year in Ceduna and about average for rainfall, so plan for around 30.3°C daytime highs and 15.5°C at night.
Not quite — December is the 10th coolest month in Ceduna, averaging 22.9°C.
For December in Ceduna, pack light, breathable clothing and sun protection, with typical highs of 30.3°C and lows of 15.5°C.
Relative humidity in December averages 51% — relatively dry.
Average wind speed in December is 4.4 m/s. The windiest December on record averaged 4.8 m/s (1986).
The wettest December on record was 1992 with 96 mm. On average, December sees 19 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 Ceduna 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.
