December is one of the warmer months of the year in Port Hedland, with average highs near 39.8°C and lows around 26.1°C (mean 33°C). It is about average for rainfall, averaging 28 mm of rainfall and 49% relative humidity across the period.
December is one of the warmer months of the year in Port Hedland. Across 45 years of records, the warmest December in Port Hedland was 2019 — when the month averaged 35.5°C — while the coldest was 1988 at 30.6°C. Typical December days reach 39.8°C with nights near 26.1°C. The long-term trend is warming, about 0.3°C per decade.
December is about average for rainfall in Port Hedland, averaging 28 mm of rainfall. The wettest December on record was 2013 with 165 mm, while the driest were 2001, 2015 and 2018 at 0 mm.
Relative humidity in Port Hedland during December averages 49%. The most humid December was 1999 at 58%, and the least humid was 2019 at 39%.
December receives about 7.9 kWh/m²/day of solar energy in Port Hedland. The sunniest Decembers were 1986, 1990 and 1992, among others at 8.5 kWh/m²/day, and the cloudiest was 2012 at 6.7.
Average wind speed in Port Hedland during December is 3.8 m/s. The windiest Decembers were 2001, 2015 and 2023, among others at 4.3 m/s, while the calmest was 2012 at 3.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 32.6°C | 32.6°C | 33.0°C | 33.0°C | 33.8°C | +1.2°C |
| Avg High | 39.7°C | 39.3°C | 39.9°C | 39.7°C | 40.6°C | +0.9°C |
| Avg Low | 25.5°C | 25.8°C | 26.1°C | 26.4°C | 27.0°C | +1.5°C |
| Avg Rain | 25 mm | 41 mm | 23 mm | 27 mm | 19 mm | -5 mm |
December temperatures in Port Hedland have risen by about 1.4°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 20.2°C (1985) to a record high of 47.6°C (2023).
Rainfall in December is about average for rainfall, averaging 28 mm, with a wettest year of 165 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
A quieter season to visit Port Hedland
If your dates are flexible, the more temperate months of August and June tend to be the most comfortable for visiting Port Hedland. That said, December — with days averaging 39.8°C and nights around 26.1°C (mean 33°C) and low rainfall (28 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 42.0°C | 34.9°C | 27.7°C | 45.4°C | 25.5°C | 4 mm | 48% | 3.5 m/s | — |
| 2024 | 39.8°C | 34.1°C | 28.3°C | 44.8°C | 24.7°C | 33 mm | 53% | 3.3 m/s | 7.2 |
| 2023 | 40.8°C | 32.9°C | 25.1°C | 47.6°C | 20.2°C | 9 mm | 47% | 4.3 m/s | 8.4 |
| 2022 | 40.2°C | 33.2°C | 26.3°C | 46.2°C | 22.6°C | 3 mm | 46% | 4.1 m/s | 8 |
| 2021 | 42.8°C | 35.3°C | 27.8°C | 47.2°C | 25.3°C | 7 mm | 44% | 3.6 m/s | 8.1 |
| 2020 | 38.1°C | 32.4°C | 26.7°C | 42.4°C | 22.7°C | 60 mm | 54% | 3.6 m/s | 7.4 |
| 2019 🔥 | 42.5°C | 35.5°C | 28.5°C | 46.6°C | 24.4°C | 3 mm | 39% | 3.6 m/s | 7.8 |
| 2018 | 40.7°C | 33.1°C | 25.5°C | 47.3°C | 22.4°C | 0 mm | 48% | 3.8 m/s | 8.2 |
| 2017 | 39.8°C | 33.2°C | 26.6°C | 43.1°C | 24.6°C | 30 mm | 51% | 3.7 m/s | 7.6 |
| 2016 | 38.3°C | 32.7°C | 27.2°C | 43.5°C | 23.0°C | 8 mm | 55% | 3.9 m/s | 7.4 |
| 2015 | 39.6°C | 32.4°C | 25.3°C | 43.9°C | 22.8°C | 0 mm | 53% | 4.3 m/s | 8.2 |
| 2014 | 40.2°C | 33.2°C | 26.1°C | 47.5°C | 23.7°C | 7 mm | 48% | 3.9 m/s | 8.2 |
| 2013 🌧️ | 39.2°C | 32.6°C | 26.1°C | 44.0°C | 22.2°C | 165 mm | 52% | 4.1 m/s | 7.6 |
| 2012 | 38.8°C | 32.9°C | 27.0°C | 42.4°C | 23.5°C | 27 mm | 51% | 3.2 m/s | 6.7 |
| 2011 | 39.6°C | 32.6°C | 25.5°C | 46.4°C | 22.8°C | 3 mm | 52% | 4.2 m/s | 8.4 |
| 2010 | 37.9°C | 32.1°C | 26.3°C | 43.7°C | 24.1°C | 23 mm | 55% | 3.9 m/s | 7.8 |
| 2009 | 40.9°C | 33.7°C | 26.4°C | 44.9°C | 23.3°C | 71 mm | 46% | 3.8 m/s | 7.9 |
| 2008 | 38.7°C | 32.0°C | 25.3°C | 43.8°C | 22.2°C | 75 mm | 49% | 4 m/s | 8 |
| 2007 | 39.2°C | 32.5°C | 25.8°C | 44.5°C | 23.0°C | 14 mm | 48% | 3.9 m/s | 8 |
| 2006 | 40.4°C | 33.4°C | 26.4°C | 44.8°C | 24.0°C | 4 mm | 44% | 3.5 m/s | 8.2 |
| 2005 | 39.6°C | 33.0°C | 26.3°C | 45.8°C | 23.1°C | 32 mm | 50% | 3.7 m/s | 7.7 |
| 2004 | 42.0°C | 34.8°C | 27.5°C | 46.7°C | 23.4°C | 6 mm | 43% | 3.7 m/s | 7.8 |
| 2003 | 40.5°C | 32.8°C | 25.1°C | 44.6°C | 21.5°C | 3 mm | 47% | 4.1 m/s | 8.1 |
| 2002 | 40.7°C | 33.7°C | 26.7°C | 45.9°C | 23.3°C | 9 mm | 50% | 3.6 m/s | 8.1 |
| 2001 | 37.1°C | 30.7°C | 24.4°C | 41.5°C | 22.1°C | 0 mm | 54% | 4.3 m/s | 8.3 |
| 2000 | 39.9°C | 33.4°C | 26.8°C | 46.0°C | 24.9°C | 22 mm | 51% | 4 m/s | 7.7 |
| 1999 | 37.3°C | 31.6°C | 25.8°C | 42.4°C | 20.9°C | 146 mm | 58% | 3.8 m/s | 7.2 |
| 1998 | 37.6°C | 31.9°C | 26.1°C | 43.2°C | 22.5°C | 71 mm | 57% | 3.9 m/s | 7.2 |
| 1997 | 40.2°C | 33.4°C | 26.7°C | 43.8°C | 24.0°C | 6 mm | 54% | 3.8 m/s | 8.3 |
| 1996 | 38.4°C | 32.0°C | 25.7°C | 44.4°C | 22.5°C | 65 mm | 54% | 3.6 m/s | 7.8 |
| 1995 | 36.9°C | 31.0°C | 25.1°C | 47.1°C | 21.2°C | 61 mm | 57% | 4.1 m/s | 7.4 |
| 1994 | 39.7°C | 33.4°C | 27.1°C | 45.7°C | 24.5°C | 39 mm | 51% | 3.3 m/s | 7.9 |
| 1993 | 40.3°C | 33.5°C | 26.7°C | 44.5°C | 22.7°C | 21 mm | 46% | 4 m/s | 7.8 |
| 1992 | 40.5°C | 32.3°C | 24.1°C | 47.2°C | 21.3°C | 1 mm | 44% | 3.8 m/s | 8.5 |
| 1991 | 41.1°C | 33.2°C | 25.3°C | 44.7°C | 22.2°C | 1 mm | 45% | 3.6 m/s | 8.2 |
| 1990 | 41.1°C | 33.4°C | 25.7°C | 47.1°C | 21.1°C | 1 mm | 45% | 4 m/s | 8.5 |
| 1989 | 40.6°C | 33.0°C | 25.3°C | 44.0°C | 20.7°C | 7 mm | 44% | 4.2 m/s | 8.4 |
| 1988 ❄️ | 36.8°C | 30.6°C | 24.4°C | 42.7°C | 20.6°C | 123 mm | 55% | 4.3 m/s | 7.7 |
| 1987 | 40.0°C | 32.5°C | 24.9°C | 46.8°C | 20.3°C | 7 mm | 44% | 4.1 m/s | 8.4 |
| 1986 | 41.9°C | 33.6°C | 25.4°C | 46.3°C | 21.3°C | 1 mm | 42% | 3.8 m/s | 8.5 |
| 1985 | 40.5°C | 32.8°C | 25.2°C | 46.2°C | 20.2°C | 6 mm | 42% | 3.7 m/s | 8.5 |
| 1984 | 38.1°C | 31.7°C | 25.3°C | 45.0°C | 21.8°C | 24 mm | 52% | 4.2 m/s | 7.5 |
| 1983 | 39.4°C | 32.8°C | 26.2°C | 45.4°C | 21.6°C | 15 mm | 49% | 3.6 m/s | — |
| 1982 | 40.6°C | 33.9°C | 27.2°C | 45.6°C | 24.6°C | 10 mm | 45% | 3.8 m/s | — |
| 1981 | 39.1°C | 32.1°C | 25.2°C | 46.6°C | 21.6°C | 28 mm | 52% | 3.9 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 39.8°C with lows near 26.1°C (mean 33°C), based on 45 years of NASA POWER data.
December averages 28 mm of rainfall in Port Hedland, about average for rainfall. The wettest on record was 165 mm in 2013.
The hottest December reached 47.6°C in 2023. The coldest dipped to 20.2°C in 1985.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.4°C. Daytime highs moved from 39.5°C to 41.1°C and overnight lows from 25.8°C to 27°C over the same span.
December is one of the warmer months of the year in Port Hedland and about average for rainfall, so plan for around 39.8°C daytime highs and 26.1°C at night.
Not quite — December is the 12th coolest month in Port Hedland, averaging 33°C.
For December in Port Hedland, pack light, breathable clothing and sun protection, with typical highs of 39.8°C and lows of 26.1°C.
Relative humidity in December averages 49% — relatively dry.
Average wind speed in December is 3.8 m/s. The windiest December on record averaged 4.3 m/s (1988).
The wettest December on record was 2013 with 165 mm. On average, December sees 28 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 Port Hedland 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.
