December is one of the warmer months of the year in Kalbarri, with average highs near 33.5°C and lows around 18.6°C (mean 26.1°C). It is one of the drier months, averaging 6 mm of rainfall and 52% relative humidity across the period.
December is one of the warmer months of the year in Kalbarri. Across 45 years of records, the warmest December in Kalbarri was 2019 — when the month averaged 28.5°C — while the coldest was 2005 at 23.2°C. Typical December days reach 33.5°C with nights near 18.6°C. The long-term trend is warming, about 0.5°C per decade.
December is one of the drier months in Kalbarri, averaging 6 mm of rainfall. The wettest December on record was 2010 with 59 mm, while the driest were 1985, 1986 and 2023 at 0 mm.
Relative humidity in Kalbarri during December averages 52%. The most humid December was 1991 at 58%, and the least humid was 2009 at 46%.
December receives about 8.6 kWh/m²/day of solar energy in Kalbarri. The sunniest Decembers were 2005, 2014 and 2020, among others at 9 kWh/m²/day, and the cloudiest were 2010 and 2011 at 7.9.
Average wind speed in Kalbarri during December is 5.1 m/s. The windiest Decembers were 2003 and 2016 at 5.6 m/s, while the calmest was 2012 at 4.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.9°C | 26.1°C | 25.9°C | 26.5°C | 27.3°C | +2.4°C |
| Avg High | 32.2°C | 33.5°C | 33.5°C | 34.0°C | 34.9°C | +2.7°C |
| Avg Low | 17.6°C | 18.7°C | 18.3°C | 19.1°C | 19.7°C | +2.1°C |
| Avg Rain | 3 mm | 6 mm | 8 mm | 12 mm | 1 mm | -1 mm |
December temperatures in Kalbarri have risen by about 2.4°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 11.9°C (2020) to a record high of 45.8°C (2010).
Rainfall in December is one of the drier months, averaging 6 mm, with a wettest year of 59 mm.
A good time to visit Kalbarri
December is a good time to visit Kalbarri, with days averaging 33.5°C and nights around 18.6°C (mean 26.1°C, warmer than Kalbarri's yearly average) and low rainfall. October and November 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 | 35.1°C | 27.4°C | 19.7°C | 42.4°C | 16.2°C | 2 mm | 49% | 5.3 m/s | — |
| 2024 | 35.3°C | 27.9°C | 20.4°C | 45.8°C | 15.8°C | 2 mm | 51% | 4.7 m/s | 8.4 |
| 2023 | 34.7°C | 27.2°C | 19.7°C | 41.9°C | 17.9°C | 0 mm | 52% | 4.7 m/s | 8.8 |
| 2022 | 33.7°C | 26.5°C | 19.4°C | 40.6°C | 15.3°C | 1 mm | 49% | 4.8 m/s | 8.7 |
| 2021 | 34.9°C | 27.2°C | 19.5°C | 45.4°C | 15.0°C | 2 mm | 50% | 5.3 m/s | 8.8 |
| 2020 | 35.6°C | 27.4°C | 19.2°C | 43.0°C | 11.9°C | 0 mm | 47% | 4.9 m/s | 9 |
| 2019 🔥 | 36.4°C | 28.5°C | 20.6°C | 43.1°C | 16.8°C | 1 mm | 48% | 4.6 m/s | 8.9 |
| 2018 | 33.0°C | 25.6°C | 18.2°C | 44.1°C | 13.7°C | 9 mm | 54% | 5.5 m/s | 8.4 |
| 2017 | 33.7°C | 26.5°C | 19.3°C | 41.5°C | 15.6°C | 14 mm | 52% | 5.2 m/s | 8.3 |
| 2016 | 32.9°C | 25.2°C | 17.5°C | 41.6°C | 14.0°C | 2 mm | 52% | 5.6 m/s | 8.9 |
| 2015 | 33.7°C | 26.0°C | 18.3°C | 43.7°C | 14.8°C | 19 mm | 52% | 5.3 m/s | 8.7 |
| 2014 | 33.1°C | 25.6°C | 18.0°C | 40.5°C | 14.7°C | 1 mm | 52% | 5.4 m/s | 9 |
| 2013 | 35.2°C | 27.5°C | 19.7°C | 42.2°C | 14.9°C | 3 mm | 47% | 5.1 m/s | 8.7 |
| 2012 | 34.7°C | 27.1°C | 19.6°C | 42.0°C | 13.2°C | 12 mm | 52% | 4.5 m/s | 8.1 |
| 2011 | 33.5°C | 26.9°C | 20.3°C | 42.6°C | 17.0°C | 3 mm | 53% | 4.6 m/s | 7.9 |
| 2010 🌧️ | 33.5°C | 26.4°C | 19.4°C | 45.8°C | 15.2°C | 59 mm | 55% | 5.3 m/s | 7.9 |
| 2009 | 35.3°C | 27.5°C | 19.7°C | 43.7°C | 15.3°C | 4 mm | 46% | 4.9 m/s | 8.4 |
| 2008 | 32.2°C | 24.7°C | 17.3°C | 41.5°C | 15.0°C | 4 mm | 55% | 5.4 m/s | 8.8 |
| 2007 | 32.3°C | 25.4°C | 18.5°C | 42.8°C | 12.9°C | 41 mm | 52% | 5.3 m/s | 8.2 |
| 2006 | 35.4°C | 27.5°C | 19.5°C | 42.2°C | 13.8°C | 16 mm | 48% | 4.9 m/s | 8.8 |
| 2005 ❄️ | 30.3°C | 23.2°C | 16.0°C | 39.7°C | 13.0°C | 1 mm | 56% | 5.4 m/s | 9 |
| 2004 | 33.3°C | 25.6°C | 17.9°C | 41.4°C | 13.1°C | 1 mm | 56% | 4.6 m/s | 8.9 |
| 2003 | 33.9°C | 25.9°C | 17.9°C | 43.1°C | 12.9°C | 0 mm | 52% | 5.6 m/s | 8.8 |
| 2002 | 33.8°C | 26.3°C | 18.8°C | 42.0°C | 13.3°C | 4 mm | 53% | 4.8 m/s | 8.7 |
| 2001 | 31.8°C | 24.9°C | 18.0°C | 38.9°C | 14.6°C | 5 mm | 53% | 5.3 m/s | 8.6 |
| 2000 | 36.6°C | 28.0°C | 19.4°C | 43.6°C | 13.6°C | 1 mm | 47% | 5.5 m/s | 8.4 |
| 1999 | 34.6°C | 27.5°C | 20.3°C | 40.4°C | 15.3°C | 4 mm | 51% | 4.8 m/s | 8.6 |
| 1998 | 33.9°C | 26.6°C | 19.3°C | 40.9°C | 12.7°C | 25 mm | 54% | 5 m/s | 8.4 |
| 1997 | 35.2°C | 27.1°C | 19.0°C | 44.9°C | 15.7°C | 1 mm | 50% | 5.5 m/s | 8.7 |
| 1996 | 33.5°C | 26.0°C | 18.6°C | 43.1°C | 14.2°C | 3 mm | 50% | 5.4 m/s | 8.7 |
| 1995 | 32.3°C | 25.5°C | 18.7°C | 39.2°C | 14.9°C | 7 mm | 53% | 5.2 m/s | 8.4 |
| 1994 | 35.2°C | 27.4°C | 19.6°C | 42.7°C | 15.4°C | 3 mm | 48% | 5 m/s | 8.4 |
| 1993 | 34.3°C | 26.4°C | 18.5°C | 40.5°C | 14.8°C | 3 mm | 48% | 5.1 m/s | 8.7 |
| 1992 | 32.4°C | 25.0°C | 17.6°C | 40.4°C | 14.5°C | 2 mm | 51% | 5 m/s | 8.8 |
| 1991 | 31.6°C | 24.3°C | 17.0°C | 40.3°C | 14.7°C | 11 mm | 58% | 4.8 m/s | 8.2 |
| 1990 | 32.2°C | 25.2°C | 18.2°C | 41.2°C | 15.4°C | 4 mm | 54% | 5.3 m/s | 8.7 |
| 1989 | 31.2°C | 24.2°C | 17.2°C | 38.7°C | 15.2°C | 0 mm | 57% | 5.2 m/s | 8.7 |
| 1988 | 33.4°C | 26.1°C | 18.9°C | 41.1°C | 15.2°C | 9 mm | 51% | 5.1 m/s | 8.6 |
| 1987 | 32.5°C | 25.0°C | 17.6°C | 43.7°C | 13.3°C | 2 mm | 56% | 4.8 m/s | 8.4 |
| 1986 | 32.2°C | 24.6°C | 17.0°C | 40.2°C | 14.0°C | 0 mm | 54% | 5 m/s | 8.8 |
| 1985 | 30.8°C | 23.5°C | 16.2°C | 39.1°C | 13.1°C | 0 mm | 51% | 5.2 m/s | 9 |
| 1984 | 31.4°C | 24.0°C | 16.6°C | 39.3°C | 14.2°C | 1 mm | 55% | 5.3 m/s | 8.3 |
| 1983 | 33.6°C | 26.2°C | 18.8°C | 41.8°C | 14.8°C | 7 mm | 55% | 4.6 m/s | — |
| 1982 | 31.7°C | 24.8°C | 17.9°C | 39.3°C | 16.1°C | 0 mm | 56% | 4.7 m/s | — |
| 1981 | 32.8°C | 25.4°C | 18.0°C | 41.9°C | 14.6°C | 5 mm | 51% | 5.1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 33.5°C with lows near 18.6°C (mean 26.1°C), based on 45 years of NASA POWER data.
December averages 6 mm of rainfall in Kalbarri, one of the drier months. The wettest on record was 59 mm in 2010.
The hottest December reached 45.8°C in 2010. The coldest dipped to 11.9°C in 2020.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 2.4°C. Daytime highs moved from 32.1°C to 34.7°C and overnight lows from 17.5°C to 19.7°C over the same span.
December is one of the warmer months of the year in Kalbarri and one of the drier months, so plan for around 33.5°C daytime highs and 18.6°C at night.
Not quite — December is the 9th coolest month in Kalbarri, averaging 26.1°C.
For December in Kalbarri, pack light, breathable clothing and sun protection, with typical highs of 33.5°C and lows of 18.6°C.
Relative humidity in December averages 52% — relatively dry.
Average wind speed in December is 5.1 m/s. The windiest December on record averaged 5.6 m/s (2003).
The wettest December on record was 2010 with 59 mm. On average, December sees 6 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 Kalbarri 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.
