December is one of the warmer months of the year in Gladstone, with average highs near 30.7°C and lows around 21.7°C (mean 26.2°C). It is a relatively wet time of year, averaging 112 mm of rainfall and 70% relative humidity across the period.
December is one of the warmer months of the year in Gladstone. Across 45 years of records, the warmest December in Gladstone was 2005 — when the month averaged 28.2°C — while the coldest was 1999 at 24.3°C. Typical December days reach 30.7°C with nights near 21.7°C. The long-term December temperature trend is broadly flat.
December is a relatively wet time of year in Gladstone, averaging 112 mm of rainfall. The wettest December on record was 2010 with 551 mm, while the driest was 2012 at 28 mm.
Relative humidity in Gladstone during December averages 70%. The most humid December was 2010 at 86%, and the least humid was 2012 at 62%.
December receives about 7.1 kWh/m²/day of solar energy in Gladstone. The sunniest December was 2013 at 8 kWh/m²/day, and the cloudiest was 2010 at 5.4.
Average wind speed in Gladstone during December is 3.4 m/s. The windiest December was 2018 at 4.4 m/s, while the calmest were 1981 and 2014 at 2.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 26.1°C | 26.0°C | 26.3°C | 26.2°C | 26.6°C | +0.5°C |
| Avg High | 30.8°C | 30.5°C | 30.7°C | 30.7°C | 31.0°C | +0.2°C |
| Avg Low | 21.5°C | 21.6°C | 21.8°C | 21.8°C | 22.2°C | +0.7°C |
| Avg Rain | 105 mm | 114 mm | 118 mm | 122 mm | 96 mm | -9 mm |
December temperatures in Gladstone have stayed relatively stable across the record.
December has ranged from a record low of 15.6°C (2022) to a record high of 39.5°C (1981).
Rainfall in December is a relatively wet time of year, averaging 112 mm, with a wettest year of 551 mm.
A quieter season to visit Gladstone
If your dates are flexible, the more temperate months of September and April tend to be the most comfortable for visiting Gladstone. That said, December — with days averaging 30.7°C and nights around 21.7°C (mean 26.2°C) and higher rainfall (112 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 | 31.6°C | 26.9°C | 22.2°C | 34.5°C | 17.7°C | 95 mm | 66% | 3.3 m/s | — |
| 2024 | 31.6°C | 27.3°C | 22.9°C | 37.8°C | 19.7°C | 92 mm | 71% | 3.3 m/s | 6.8 |
| 2023 | 31.8°C | 27.6°C | 23.5°C | 34.8°C | 20.3°C | 153 mm | 72% | 3.4 m/s | 7 |
| 2022 | 29.7°C | 24.9°C | 20.1°C | 36.3°C | 15.6°C | 67 mm | 70% | 3.5 m/s | 7.3 |
| 2021 | 29.6°C | 25.7°C | 21.8°C | 32.7°C | 20.5°C | 76 mm | 76% | 2.9 m/s | 7 |
| 2020 | 31.6°C | 27.1°C | 22.6°C | 35.0°C | 20.1°C | 94 mm | 68% | 3.7 m/s | 6.9 |
| 2019 | 33.1°C | 27.8°C | 22.5°C | 39.3°C | 21.2°C | 34 mm | 62% | 3.6 m/s | 7.5 |
| 2018 | 30.5°C | 26.5°C | 22.4°C | 37.6°C | 19.9°C | 108 mm | 71% | 4.4 m/s | 6.3 |
| 2017 | 31.0°C | 26.2°C | 21.5°C | 34.0°C | 17.5°C | 52 mm | 69% | 3 m/s | 7.6 |
| 2016 | 31.3°C | 26.8°C | 22.2°C | 36.0°C | 20.1°C | 48 mm | 68% | 3.5 m/s | 7.1 |
| 2015 | 30.8°C | 26.1°C | 21.4°C | 33.3°C | 19.1°C | 30 mm | 66% | 3.6 m/s | 7.3 |
| 2014 | 29.6°C | 25.7°C | 21.9°C | 33.4°C | 18.4°C | 216 mm | 76% | 2.8 m/s | 7 |
| 2013 | 30.6°C | 25.6°C | 20.7°C | 36.0°C | 18.3°C | 31 mm | 66% | 3.3 m/s | 8 |
| 2012 | 32.1°C | 27.0°C | 22.0°C | 37.8°C | 18.7°C | 28 mm | 62% | 3.7 m/s | 7.4 |
| 2011 | 29.8°C | 25.4°C | 21.0°C | 34.6°C | 18.6°C | 124 mm | 71% | 3.7 m/s | 6.4 |
| 2010 🌧️ | 27.7°C | 24.9°C | 22.0°C | 30.0°C | 17.7°C | 551 mm | 86% | 3.2 m/s | 5.4 |
| 2009 | 30.4°C | 26.4°C | 22.4°C | 33.4°C | 19.6°C | 169 mm | 71% | 3.1 m/s | 7.3 |
| 2008 | 31.8°C | 26.9°C | 22.0°C | 38.0°C | 19.5°C | 87 mm | 69% | 2.9 m/s | 7.5 |
| 2007 | 29.2°C | 25.3°C | 21.3°C | 32.3°C | 17.5°C | 168 mm | 74% | 3.5 m/s | 6.3 |
| 2006 | 29.6°C | 25.0°C | 20.5°C | 33.8°C | 18.6°C | 60 mm | 67% | 4.1 m/s | 6.9 |
| 2005 🔥 | 33.1°C | 28.2°C | 23.3°C | 37.4°C | 18.8°C | 91 mm | 68% | 2.9 m/s | 7.8 |
| 2004 | 30.9°C | 26.5°C | 22.1°C | 37.6°C | 17.2°C | 122 mm | 71% | 3.2 m/s | 7.1 |
| 2003 | 29.5°C | 25.6°C | 21.7°C | 32.4°C | 18.9°C | 192 mm | 76% | 3.1 m/s | 6.8 |
| 2002 | 30.9°C | 26.2°C | 21.4°C | 37.1°C | 17.3°C | 92 mm | 64% | 3.5 m/s | 7.6 |
| 2001 | 32.9°C | 27.9°C | 22.8°C | 38.4°C | 19.8°C | 106 mm | 69% | 3.3 m/s | 7.5 |
| 2000 | 28.8°C | 24.6°C | 20.4°C | 32.1°C | 17.5°C | 92 mm | 73% | 3.1 m/s | 7 |
| 1999 ❄️ | 28.7°C | 24.3°C | 20.0°C | 33.6°C | 17.9°C | 103 mm | 70% | 3.9 m/s | 6.9 |
| 1998 | 30.9°C | 26.4°C | 21.9°C | 37.3°C | 17.6°C | 61 mm | 71% | 3.4 m/s | 7.1 |
| 1997 | 31.4°C | 27.3°C | 23.1°C | 36.7°C | 20.8°C | 91 mm | 73% | 3.1 m/s | 6.5 |
| 1996 | 30.6°C | 26.2°C | 21.7°C | 38.1°C | 19.3°C | 122 mm | 72% | 3.4 m/s | 7.1 |
| 1995 | 30.9°C | 26.1°C | 21.3°C | 36.6°C | 16.7°C | 127 mm | 68% | 3.4 m/s | 7.1 |
| 1994 | 30.5°C | 25.6°C | 20.7°C | 35.2°C | 18.2°C | 73 mm | 65% | 3.6 m/s | 7.6 |
| 1993 | 30.1°C | 25.5°C | 20.8°C | 35.6°C | 17.2°C | 54 mm | 68% | 3.4 m/s | 7.1 |
| 1992 | 30.5°C | 26.1°C | 21.7°C | 35.0°C | 17.5°C | 55 mm | 66% | 3.6 m/s | 7 |
| 1991 | 30.1°C | 26.0°C | 22.0°C | 36.5°C | 19.7°C | 197 mm | 75% | 3.1 m/s | 6.9 |
| 1990 | 31.0°C | 26.9°C | 22.9°C | 36.5°C | 19.8°C | 257 mm | 71% | 3.6 m/s | 6.6 |
| 1989 | 30.5°C | 25.6°C | 20.6°C | 37.4°C | 18.0°C | 42 mm | 67% | 3.3 m/s | 7.6 |
| 1988 | 28.8°C | 25.3°C | 21.7°C | 31.6°C | 19.1°C | 244 mm | 77% | 4 m/s | 6.5 |
| 1987 | 30.6°C | 26.0°C | 21.3°C | 37.0°C | 18.5°C | 62 mm | 68% | 3.1 m/s | 7.2 |
| 1986 | 30.8°C | 26.0°C | 21.2°C | 35.1°C | 16.9°C | 67 mm | 70% | 3.2 m/s | 7.5 |
| 1985 | 32.0°C | 27.4°C | 22.8°C | 37.0°C | 20.5°C | 126 mm | 72% | 3 m/s | 7.6 |
| 1984 | 31.6°C | 26.9°C | 22.3°C | 36.5°C | 18.1°C | 154 mm | 74% | 3.1 m/s | 7.3 |
| 1983 | 29.4°C | 24.6°C | 19.9°C | 32.6°C | 16.7°C | 51 mm | 68% | 3.5 m/s | — |
| 1982 | 30.4°C | 25.7°C | 21.1°C | 33.7°C | 18.1°C | 131 mm | 71% | 3.2 m/s | — |
| 1981 | 32.7°C | 27.8°C | 22.9°C | 39.5°C | 21.2°C | 65 mm | 72% | 2.8 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 30.7°C with lows near 21.7°C (mean 26.2°C), based on 45 years of NASA POWER data.
December averages 112 mm of rainfall in Gladstone, a relatively wet time of year. The wettest on record was 551 mm in 2010.
The hottest December reached 39.5°C in 1981. The coldest dipped to 15.6°C in 2022.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have held steady by about 0°C — but days and nights have moved in opposite directions. Overnight lows rose from 21.8°C to 22.1°C while daytime highs eased from 31.2°C to 30.9°C, narrowing the gap between day and night.
December is one of the warmer months of the year in Gladstone and a relatively wet time of year, so plan for around 30.7°C daytime highs and 21.7°C at night.
Not quite — December is the 10th coolest month in Gladstone, averaging 26.2°C.
For December in Gladstone, pack light, breathable clothing and sun protection, with typical highs of 30.7°C and lows of 21.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 70% — moderately humid.
Average wind speed in December is 3.4 m/s. The windiest December on record averaged 4.4 m/s (2018).
The wettest December on record was 2010 with 551 mm. On average, December sees 112 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 Gladstone 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.
