December is one of the warmer months of the year in Exmouth, with average highs near 32.9°C and lows around 23.3°C (mean 28.1°C). It is one of the drier months, averaging 7 mm of rainfall and 59% relative humidity across the period.
December is one of the warmer months of the year in Exmouth. Across 45 years of records, the warmest December in Exmouth was 2024 — when the month averaged 30.9°C — while the coldest was 2001 at 26.4°C. Typical December days reach 32.9°C with nights near 23.3°C. The long-term trend is warming, about 0.3°C per decade.
December is one of the drier months in Exmouth, averaging 7 mm of rainfall. The wettest December on record was 1995 with 112 mm, while the driest were 2022, 2023 and 2025, among others at 0 mm.
Relative humidity in Exmouth during December averages 59%. The most humid December was 2010 at 66%, and the least humid was 2005 at 53%.
December receives about 8.2 kWh/m²/day of solar energy in Exmouth. The sunniest December was 2001 at 8.6 kWh/m²/day, and the cloudiest was 2012 at 7.3.
Average wind speed in Exmouth during December is 5.2 m/s. The windiest December was 1985 at 6 m/s, while the calmest was 2012 at 4.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 27.6°C | 28.0°C | 27.8°C | 28.5°C | 29.1°C | +1.5°C |
| Avg High | 32.5°C | 32.7°C | 32.8°C | 33.1°C | 33.8°C | +1.3°C |
| Avg Low | 22.6°C | 23.2°C | 22.8°C | 23.8°C | 24.3°C | +1.7°C |
| Avg Rain | 2 mm | 17 mm | 1 mm | 8 mm | 3 mm | +1 mm |
December temperatures in Exmouth have risen by about 1.2°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 18°C (1990) to a record high of 42.6°C (2019).
Rainfall in December is one of the drier months, averaging 7 mm, with a wettest year of 112 mm.
A good time to visit Exmouth
December is a good time to visit Exmouth, with days averaging 32.9°C and nights around 23.3°C (mean 28.1°C, warmer than Exmouth's yearly average) and low rainfall. September and August 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 | 34.2°C | 29.3°C | 24.4°C | 39.1°C | 22.2°C | 0 mm | 59% | 5.1 m/s | — |
| 2024 🔥 | 35.5°C | 30.9°C | 26.3°C | 41.9°C | 21.6°C | 3 mm | 59% | 4.8 m/s | 7.9 |
| 2023 | 32.0°C | 27.6°C | 23.3°C | 37.8°C | 21.8°C | 0 mm | 63% | 5.4 m/s | 8.4 |
| 2022 | 32.5°C | 28.1°C | 23.7°C | 38.5°C | 21.1°C | 0 mm | 63% | 5.2 m/s | 8.3 |
| 2021 | 34.5°C | 29.0°C | 23.5°C | 41.2°C | 20.7°C | 0 mm | 56% | 5.7 m/s | 8.3 |
| 2020 | 34.3°C | 29.5°C | 24.6°C | 39.2°C | 22.4°C | 15 mm | 59% | 4.8 m/s | 8 |
| 2019 | 36.2°C | 30.8°C | 25.3°C | 42.6°C | 22.4°C | 0 mm | 55% | 4.7 m/s | 8.4 |
| 2018 | 32.4°C | 27.3°C | 22.1°C | 40.4°C | 20.0°C | 0 mm | 61% | 5.7 m/s | 8.4 |
| 2017 | 32.6°C | 28.3°C | 23.9°C | 39.8°C | 20.6°C | 6 mm | 61% | 4.9 m/s | 7.9 |
| 2016 | 33.6°C | 28.7°C | 23.8°C | 39.1°C | 20.7°C | 8 mm | 57% | 5.5 m/s | 8 |
| 2015 | 31.8°C | 27.1°C | 22.3°C | 39.0°C | 18.4°C | 0 mm | 62% | 5.8 m/s | 8.1 |
| 2014 | 33.1°C | 28.0°C | 22.9°C | 38.4°C | 20.5°C | 0 mm | 58% | 5.4 m/s | 8.5 |
| 2013 | 33.2°C | 28.8°C | 24.3°C | 39.6°C | 20.1°C | 3 mm | 61% | 4.7 m/s | 8.2 |
| 2012 | 33.4°C | 29.2°C | 24.9°C | 38.9°C | 20.1°C | 11 mm | 60% | 4.2 m/s | 7.3 |
| 2011 | 32.8°C | 28.3°C | 23.8°C | 41.5°C | 21.3°C | 0 mm | 61% | 5.2 m/s | 8.4 |
| 2010 | 32.1°C | 28.5°C | 24.9°C | 38.1°C | 21.8°C | 50 mm | 66% | 4.9 m/s | 7.8 |
| 2009 | 33.3°C | 28.4°C | 23.5°C | 38.0°C | 20.4°C | 0 mm | 59% | 5.3 m/s | 8.4 |
| 2008 | 31.7°C | 27.0°C | 22.3°C | 37.3°C | 18.3°C | 6 mm | 60% | 5.3 m/s | 8.2 |
| 2007 | 31.3°C | 26.9°C | 22.6°C | 38.6°C | 19.8°C | 3 mm | 61% | 4.8 m/s | 8.3 |
| 2006 | 33.6°C | 28.4°C | 23.3°C | 37.5°C | 20.6°C | 1 mm | 58% | 4.5 m/s | 8.5 |
| 2005 | 33.8°C | 28.0°C | 22.3°C | 40.4°C | 19.5°C | 1 mm | 53% | 5.4 m/s | 8.2 |
| 2004 | 33.7°C | 28.4°C | 23.0°C | 41.1°C | 20.1°C | 0 mm | 57% | 5.4 m/s | 8.2 |
| 2003 | 32.1°C | 27.1°C | 22.0°C | 40.8°C | 19.5°C | 0 mm | 62% | 5.5 m/s | 8.3 |
| 2002 | 33.4°C | 28.1°C | 22.9°C | 39.6°C | 20.7°C | 0 mm | 60% | 4.9 m/s | 8.5 |
| 2001 ❄️ | 30.9°C | 26.4°C | 21.9°C | 35.7°C | 19.3°C | 0 mm | 60% | 5.7 m/s | 8.6 |
| 2000 | 33.8°C | 29.2°C | 24.5°C | 39.2°C | 21.1°C | 3 mm | 59% | 4.8 m/s | 8.3 |
| 1999 | 32.8°C | 28.4°C | 24.0°C | 35.6°C | 19.8°C | 5 mm | 61% | 4.8 m/s | 8.3 |
| 1998 | 33.0°C | 28.6°C | 24.3°C | 37.9°C | 20.3°C | 29 mm | 62% | 4.8 m/s | 8 |
| 1997 | 34.4°C | 29.1°C | 23.9°C | 39.6°C | 20.8°C | 1 mm | 59% | 5 m/s | 8.5 |
| 1996 | 33.6°C | 28.8°C | 23.9°C | 40.2°C | 20.3°C | 13 mm | 57% | 5.2 m/s | 8.2 |
| 1995 🌧️ | 30.7°C | 26.7°C | 22.8°C | 37.0°C | 20.4°C | 112 mm | 65% | 5.7 m/s | 7.7 |
| 1994 | 34.2°C | 29.2°C | 24.1°C | 40.7°C | 21.2°C | 6 mm | 58% | 4.9 m/s | 8.4 |
| 1993 | 32.4°C | 27.6°C | 22.8°C | 38.0°C | 20.6°C | 1 mm | 61% | 5.6 m/s | 8.4 |
| 1992 | 31.6°C | 26.7°C | 21.9°C | 36.9°C | 19.5°C | 0 mm | 61% | 5.5 m/s | 8.5 |
| 1991 | 31.7°C | 26.7°C | 21.7°C | 38.5°C | 19.1°C | 0 mm | 60% | 5.6 m/s | 8 |
| 1990 | 33.0°C | 27.8°C | 22.6°C | 38.7°C | 18.0°C | 0 mm | 58% | 5.6 m/s | 8.4 |
| 1989 | 31.3°C | 26.5°C | 21.7°C | 37.8°C | 20.0°C | 0 mm | 61% | 5.8 m/s | 8.5 |
| 1988 | 32.7°C | 28.2°C | 23.8°C | 38.9°C | 20.7°C | 10 mm | 57% | 5.3 m/s | 8.1 |
| 1987 | 31.7°C | 26.6°C | 21.6°C | 40.8°C | 19.1°C | 0 mm | 61% | 5.5 m/s | 8.3 |
| 1986 | 33.3°C | 27.6°C | 21.9°C | 38.9°C | 19.5°C | 0 mm | 56% | 5.9 m/s | 8.4 |
| 1985 | 32.5°C | 27.2°C | 21.9°C | 37.9°C | 19.5°C | 0 mm | 55% | 6 m/s | 8.3 |
| 1984 | 31.8°C | 27.1°C | 22.4°C | 35.9°C | 20.0°C | 1 mm | 59% | 5.7 m/s | 8 |
| 1983 | 32.7°C | 28.2°C | 23.6°C | 37.3°C | 20.6°C | 0 mm | 60% | 5.2 m/s | — |
| 1982 | 33.5°C | 28.6°C | 23.7°C | 38.9°C | 20.5°C | 1 mm | 56% | 5.1 m/s | — |
| 1981 | 32.9°C | 28.0°C | 23.1°C | 39.5°C | 20.2°C | 3 mm | 59% | 5.3 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 32.9°C with lows near 23.3°C (mean 28.1°C), based on 45 years of NASA POWER data.
December averages 7 mm of rainfall in Exmouth, one of the drier months. The wettest on record was 112 mm in 1995.
The hottest December reached 42.6°C in 2019. The coldest dipped to 18°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.2°C. Daytime highs moved from 32.7°C to 33.7°C and overnight lows from 22.9°C to 24.2°C over the same span.
December is one of the warmer months of the year in Exmouth and one of the drier months, so plan for around 32.9°C daytime highs and 23.3°C at night.
Not quite — December is the 9th coolest month in Exmouth, averaging 28.1°C.
For December in Exmouth, pack light, breathable clothing and sun protection, with typical highs of 32.9°C and lows of 23.3°C.
Relative humidity in December averages 59% — moderately humid.
Average wind speed in December is 5.2 m/s. The windiest December on record averaged 6 m/s (1985).
The wettest December on record was 1995 with 112 mm. On average, December sees 7 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 Exmouth 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.
