December is one of the warmer months of the year in Carnarvon, with average highs near 30.9°C and lows around 21.6°C (mean 26.3°C). It is about average for rainfall, averaging 9 mm of rainfall and 61% relative humidity across the period.
December is one of the warmer months of the year in Carnarvon. Across 45 years of records, the warmest Decembers in Carnarvon were 2019 and 2024 — when the month averaged 28.6°C — while the coldest was 2005 at 24.2°C. Typical December days reach 30.9°C with nights near 21.6°C. The long-term trend is warming, about 0.5°C per decade.
December is about average for rainfall in Carnarvon, averaging 9 mm of rainfall. The wettest December on record was 2010 with 248 mm, while the driest were 2022, 2023 and 2025, among others at 0 mm.
Relative humidity in Carnarvon during December averages 61%. The most humid December was 2010 at 66%, and the least humid was 1985 at 57%.
December receives about 8.5 kWh/m²/day of solar energy in Carnarvon. The sunniest December was 1986 at 8.8 kWh/m²/day, and the cloudiest was 2012 at 7.4.
Average wind speed in Carnarvon during December is 6.7 m/s. The windiest December was 2016 at 7.8 m/s, while the calmest were 1999 and 2012 at 5.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.3°C | 26.3°C | 26.0°C | 26.7°C | 27.3°C | +2°C |
| Avg High | 29.8°C | 31.0°C | 30.8°C | 31.4°C | 32.0°C | +2.2°C |
| Avg Low | 20.8°C | 21.6°C | 21.2°C | 22.0°C | 22.6°C | +1.8°C |
| Avg Rain | 1 mm | 10 mm | 1 mm | 28 mm | 0 mm | 0 mm |
December temperatures in Carnarvon have risen by about 2°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 16.2°C (1998) to a record high of 45.1°C (2018).
Rainfall in December is about average for rainfall, averaging 9 mm, with a wettest year of 248 mm.
A good time to visit Carnarvon
December is a good time to visit Carnarvon, with days averaging 30.9°C and nights around 21.6°C (mean 26.3°C, warmer than Carnarvon's yearly average) and low rainfall. October and May 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 | 32.6°C | 27.7°C | 22.8°C | 40.5°C | 20.1°C | 0 mm | 61% | 6.8 m/s | — |
| 2024 | 33.6°C | 28.6°C | 23.6°C | 43.9°C | 20.0°C | 1 mm | 59% | 6.3 m/s | 8.2 |
| 2023 | 31.1°C | 26.9°C | 22.6°C | 39.2°C | 20.7°C | 0 mm | 61% | 6.4 m/s | 8.6 |
| 2022 | 31.6°C | 27.2°C | 22.7°C | 40.6°C | 19.0°C | 0 mm | 57% | 6.3 m/s | 8.5 |
| 2021 | 31.0°C | 26.4°C | 21.7°C | 41.8°C | 19.6°C | 0 mm | 62% | 6.8 m/s | 8.6 |
| 2020 | 31.9°C | 27.1°C | 22.3°C | 40.4°C | 17.3°C | 0 mm | 61% | 6.7 m/s | 8.6 |
| 2019 🔥 | 33.5°C | 28.6°C | 23.6°C | 40.9°C | 21.6°C | 0 mm | 59% | 6.5 m/s | 8.7 |
| 2018 | 30.9°C | 25.9°C | 20.9°C | 45.1°C | 17.8°C | 1 mm | 62% | 7.3 m/s | 8.7 |
| 2017 | 31.7°C | 26.9°C | 22.1°C | 38.6°C | 19.4°C | 10 mm | 61% | 6.7 m/s | 8.1 |
| 2016 | 30.5°C | 25.7°C | 21.0°C | 36.2°C | 18.5°C | 0 mm | 60% | 7.8 m/s | 8.7 |
| 2015 | 30.5°C | 25.7°C | 21.0°C | 40.2°C | 17.9°C | 1 mm | 63% | 6.8 m/s | 8.6 |
| 2014 | 31.0°C | 26.2°C | 21.4°C | 39.7°C | 19.0°C | 0 mm | 58% | 7.4 m/s | 8.6 |
| 2013 | 32.8°C | 27.8°C | 22.8°C | 39.0°C | 19.1°C | 1 mm | 58% | 6.6 m/s | 8.2 |
| 2012 | 31.6°C | 27.0°C | 22.4°C | 37.8°C | 17.5°C | 19 mm | 62% | 5.9 m/s | 7.4 |
| 2011 | 30.7°C | 26.6°C | 22.5°C | 40.8°C | 20.4°C | 1 mm | 64% | 6.3 m/s | 8.3 |
| 2010 🌧️ | 31.1°C | 26.9°C | 22.7°C | 41.8°C | 20.1°C | 248 mm | 66% | 6.1 m/s | 7.8 |
| 2009 | 32.3°C | 27.2°C | 22.2°C | 40.7°C | 18.8°C | 0 mm | 59% | 6.3 m/s | 8.4 |
| 2008 | 30.3°C | 25.5°C | 20.7°C | 39.2°C | 17.7°C | 1 mm | 60% | 7.2 m/s | 8.7 |
| 2007 | 30.6°C | 25.8°C | 21.0°C | 41.0°C | 17.9°C | 2 mm | 61% | 6.3 m/s | 8.2 |
| 2006 | 32.0°C | 27.0°C | 22.0°C | 38.4°C | 18.8°C | 0 mm | 59% | 6.1 m/s | 8.7 |
| 2005 ❄️ | 29.2°C | 24.2°C | 19.3°C | 39.3°C | 16.9°C | 0 mm | 61% | 7.6 m/s | 8.6 |
| 2004 | 29.3°C | 25.1°C | 20.9°C | 36.2°C | 17.7°C | 0 mm | 65% | 6.5 m/s | 8.6 |
| 2003 | 31.3°C | 26.0°C | 20.7°C | 40.5°C | 18.5°C | 0 mm | 62% | 7.2 m/s | 8.6 |
| 2002 | 30.7°C | 26.1°C | 21.5°C | 39.4°C | 18.3°C | 0 mm | 62% | 6.4 m/s | 8.6 |
| 2001 | 29.8°C | 25.4°C | 21.0°C | 37.4°C | 18.1°C | 0 mm | 60% | 6.8 m/s | 8.7 |
| 2000 | 32.7°C | 27.5°C | 22.2°C | 41.6°C | 18.4°C | 2 mm | 59% | 7.1 m/s | 8.6 |
| 1999 | 31.4°C | 26.9°C | 22.5°C | 37.2°C | 18.2°C | 1 mm | 62% | 5.9 m/s | 8.7 |
| 1998 | 32.3°C | 27.3°C | 22.3°C | 38.3°C | 16.2°C | 5 mm | 60% | 6.5 m/s | 8.4 |
| 1997 | 32.7°C | 27.3°C | 21.9°C | 40.4°C | 19.4°C | 2 mm | 59% | 7.3 m/s | 8.5 |
| 1996 | 31.8°C | 26.9°C | 22.0°C | 41.1°C | 19.1°C | 1 mm | 58% | 7.1 m/s | 8.5 |
| 1995 | 29.4°C | 25.4°C | 21.4°C | 37.3°C | 19.0°C | 78 mm | 63% | 6.6 m/s | 8.1 |
| 1994 | 32.6°C | 27.3°C | 22.1°C | 41.6°C | 18.4°C | 2 mm | 60% | 6.7 m/s | 8.3 |
| 1993 | 30.6°C | 25.9°C | 21.2°C | 37.0°C | 18.6°C | 2 mm | 61% | 6.4 m/s | 8.7 |
| 1992 | 30.0°C | 25.4°C | 20.9°C | 38.4°C | 18.6°C | 0 mm | 60% | 6.5 m/s | 8.7 |
| 1991 | 29.0°C | 24.6°C | 20.1°C | 39.7°C | 17.5°C | 6 mm | 63% | 6.4 m/s | 7.9 |
| 1990 | 30.0°C | 25.5°C | 21.1°C | 38.6°C | 17.6°C | 0 mm | 61% | 6.9 m/s | 8.6 |
| 1989 | 28.4°C | 24.3°C | 20.2°C | 37.3°C | 18.9°C | 0 mm | 64% | 6.8 m/s | 8.7 |
| 1988 | 31.2°C | 26.6°C | 22.0°C | 39.5°C | 19.4°C | 2 mm | 58% | 6.8 m/s | 8.4 |
| 1987 | 29.0°C | 24.7°C | 20.3°C | 35.6°C | 17.8°C | 0 mm | 64% | 6.5 m/s | 8.3 |
| 1986 | 29.8°C | 25.0°C | 20.2°C | 37.6°C | 18.6°C | 0 mm | 62% | 7.1 m/s | 8.8 |
| 1985 | 29.2°C | 24.4°C | 19.7°C | 37.7°C | 17.8°C | 0 mm | 57% | 7.2 m/s | 8.7 |
| 1984 | 29.4°C | 24.8°C | 20.3°C | 38.2°C | 17.8°C | 2 mm | 60% | 7.3 m/s | 8 |
| 1983 | 30.5°C | 26.2°C | 21.8°C | 38.2°C | 19.5°C | 1 mm | 63% | 6.3 m/s | — |
| 1982 | 29.9°C | 25.8°C | 21.7°C | 36.7°C | 19.6°C | 0 mm | 61% | 6.6 m/s | — |
| 1981 | 30.5°C | 25.9°C | 21.4°C | 37.3°C | 18.9°C | 1 mm | 60% | 6.9 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 21.6°C (mean 26.3°C), based on 45 years of NASA POWER data.
December averages 9 mm of rainfall in Carnarvon, about average for rainfall. The wettest on record was 248 mm in 2010.
The hottest December reached 45.1°C in 2018. The coldest dipped to 16.2°C in 1998.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 2°C. Daytime highs moved from 29.9°C to 32°C and overnight lows from 21°C to 22.7°C over the same span.
December is one of the warmer months of the year in Carnarvon and about average for rainfall, so plan for around 30.9°C daytime highs and 21.6°C at night.
Not quite — December is the 9th coolest month in Carnarvon, averaging 26.3°C.
For December in Carnarvon, pack light, breathable clothing and sun protection, with typical highs of 30.9°C and lows of 21.6°C.
Relative humidity in December averages 61% — moderately humid.
Average wind speed in December is 6.7 m/s. The windiest December on record averaged 7.8 m/s (2016).
The wettest December on record was 2010 with 248 mm. On average, December sees 9 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 Carnarvon 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.
