December is one of the warmer months of the year in Hervey Bay, with average highs near 27.1°C and lows around 23°C (mean 25.1°C). It is a relatively wet time of year, averaging 126 mm of rainfall and 74% relative humidity across the period.
December is one of the warmer months of the year in Hervey Bay. Across 45 years of records, the warmest December in Hervey Bay was 2005 — when the month averaged 26.7°C — while the coldest was 1999 at 23.3°C. Typical December days reach 27.1°C with nights near 23°C. The long-term December temperature trend is broadly flat.
December is a relatively wet time of year in Hervey Bay, averaging 126 mm of rainfall. The wettest December on record was 2010 with 690 mm, while the driest was 2019 at 30 mm.
Relative humidity in Hervey Bay during December averages 74%. The most humid December was 2010 at 85%, and the least humid was 2013 at 69%.
December receives about 6.8 kWh/m²/day of solar energy in Hervey Bay. The sunniest December was 2013 at 7.9 kWh/m²/day, and the cloudiest was 2010 at 5.
Average wind speed in Hervey Bay during December is 4 m/s. The windiest December was 2011 at 4.8 m/s, while the calmest were 1981 and 2017 at 3.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.8°C | 24.9°C | 25.3°C | 25.0°C | 25.5°C | +0.7°C |
| Avg High | 26.9°C | 27.0°C | 27.5°C | 27.0°C | 27.4°C | +0.5°C |
| Avg Low | 22.7°C | 22.8°C | 23.1°C | 23.0°C | 23.5°C | +0.8°C |
| Avg Rain | 103 mm | 109 mm | 126 mm | 164 mm | 120 mm | +17 mm |
December temperatures in Hervey Bay have risen by about 0.4°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 18.6°C (1986) to a record high of 34.2°C (2008).
Rainfall in December is a relatively wet time of year, averaging 126 mm, with a wettest year of 690 mm.
A quieter season to visit Hervey Bay
If your dates are flexible, the more temperate months of October and September tend to be the most comfortable for visiting Hervey Bay. That said, December — with days averaging 27.1°C and nights around 23°C (mean 25.1°C) and higher rainfall (126 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 | 27.8°C | 25.7°C | 23.6°C | 31.0°C | 21.2°C | 79 mm | 71% | 3.8 m/s | — |
| 2024 | 27.5°C | 25.7°C | 24.0°C | 30.4°C | 22.0°C | 210 mm | 78% | 3.7 m/s | 6.4 |
| 2023 | 28.5°C | 26.4°C | 24.4°C | 31.5°C | 22.4°C | 137 mm | 77% | 3.8 m/s | 6.9 |
| 2022 | 26.3°C | 24.2°C | 22.1°C | 31.9°C | 19.2°C | 83 mm | 74% | 4.7 m/s | 6.6 |
| 2021 | 26.8°C | 25.0°C | 23.3°C | 28.5°C | 22.2°C | 109 mm | 77% | 3.7 m/s | 6.9 |
| 2020 | 27.7°C | 25.7°C | 23.7°C | 31.6°C | 21.9°C | 102 mm | 75% | 4.2 m/s | 6.5 |
| 2019 | 28.5°C | 26.1°C | 23.6°C | 33.0°C | 22.3°C | 30 mm | 70% | 3.9 m/s | 7.6 |
| 2018 | 26.7°C | 25.0°C | 23.3°C | 30.5°C | 21.7°C | 153 mm | 77% | 4.5 m/s | 6.5 |
| 2017 | 26.6°C | 24.7°C | 22.8°C | 28.7°C | 18.8°C | 121 mm | 78% | 3.2 m/s | 7.3 |
| 2016 | 27.6°C | 25.4°C | 23.3°C | 32.3°C | 21.7°C | 56 mm | 73% | 3.9 m/s | 6.6 |
| 2015 | 26.9°C | 24.9°C | 22.8°C | 29.6°C | 21.2°C | 65 mm | 72% | 4.2 m/s | 6.9 |
| 2014 | 27.3°C | 25.3°C | 23.3°C | 30.6°C | 21.0°C | 152 mm | 76% | 3.6 m/s | 6.5 |
| 2013 | 27.1°C | 24.8°C | 22.5°C | 31.4°C | 20.0°C | 35 mm | 69% | 3.8 m/s | 7.9 |
| 2012 | 27.7°C | 25.5°C | 23.3°C | 31.8°C | 21.5°C | 44 mm | 70% | 4.1 m/s | 7.3 |
| 2011 | 25.4°C | 23.7°C | 22.0°C | 28.5°C | 20.6°C | 297 mm | 77% | 4.8 m/s | 5.6 |
| 2010 🌧️ | 26.2°C | 24.8°C | 23.3°C | 28.0°C | 20.4°C | 690 mm | 85% | 4.2 m/s | 5 |
| 2009 | 27.5°C | 25.5°C | 23.6°C | 29.2°C | 21.6°C | 158 mm | 74% | 3.8 m/s | 6.8 |
| 2008 | 28.6°C | 26.1°C | 23.5°C | 34.2°C | 21.7°C | 52 mm | 70% | 3.6 m/s | 7.3 |
| 2007 | 26.8°C | 24.9°C | 23.1°C | 29.2°C | 21.3°C | 135 mm | 74% | 4.4 m/s | 5.5 |
| 2006 | 25.5°C | 23.5°C | 21.5°C | 28.2°C | 20.2°C | 114 mm | 73% | 4.4 m/s | 6.6 |
| 2005 🔥 | 28.9°C | 26.7°C | 24.4°C | 31.3°C | 22.5°C | 167 mm | 75% | 3.5 m/s | 7.7 |
| 2004 | 27.3°C | 25.2°C | 23.1°C | 30.7°C | 21.2°C | 163 mm | 75% | 4 m/s | 6.8 |
| 2003 | 26.9°C | 24.9°C | 22.9°C | 30.3°C | 19.9°C | 181 mm | 76% | 3.9 m/s | 6.5 |
| 2002 | 27.2°C | 24.9°C | 22.7°C | 32.5°C | 20.3°C | 133 mm | 70% | 4 m/s | 7.3 |
| 2001 | 29.1°C | 26.5°C | 23.9°C | 33.3°C | 21.9°C | 85 mm | 73% | 4.1 m/s | 7 |
| 2000 | 26.9°C | 24.7°C | 22.6°C | 30.4°C | 20.9°C | 72 mm | 73% | 3.9 m/s | 6.8 |
| 1999 ❄️ | 25.2°C | 23.3°C | 21.4°C | 28.7°C | 20.1°C | 131 mm | 74% | 4.5 m/s | 6.7 |
| 1998 | 27.2°C | 25.2°C | 23.1°C | 31.8°C | 20.3°C | 83 mm | 76% | 3.8 m/s | 7.1 |
| 1997 | 28.7°C | 26.5°C | 24.4°C | 32.4°C | 22.3°C | 66 mm | 75% | 3.8 m/s | 6.6 |
| 1996 | 27.3°C | 25.0°C | 22.8°C | 33.1°C | 20.6°C | 101 mm | 75% | 4.2 m/s | 6.5 |
| 1995 | 27.0°C | 24.8°C | 22.6°C | 31.2°C | 19.9°C | 182 mm | 72% | 4 m/s | 7.1 |
| 1994 | 26.6°C | 24.4°C | 22.2°C | 30.1°C | 20.5°C | 61 mm | 70% | 4.2 m/s | 7.2 |
| 1993 | 26.7°C | 24.4°C | 22.1°C | 31.4°C | 20.3°C | 74 mm | 71% | 3.8 m/s | 6.9 |
| 1992 | 26.5°C | 24.5°C | 22.5°C | 29.6°C | 20.7°C | 93 mm | 72% | 4.1 m/s | 6.5 |
| 1991 | 26.8°C | 24.8°C | 22.8°C | 30.8°C | 20.8°C | 210 mm | 77% | 3.9 m/s | 6.9 |
| 1990 | 28.0°C | 25.9°C | 23.8°C | 31.6°C | 21.3°C | 94 mm | 75% | 3.8 m/s | 6.8 |
| 1989 | 26.3°C | 24.0°C | 21.8°C | 30.3°C | 19.8°C | 39 mm | 73% | 4.3 m/s | 7 |
| 1988 | 26.4°C | 24.8°C | 23.1°C | 28.5°C | 21.9°C | 179 mm | 78% | 4.5 m/s | 6.4 |
| 1987 | 27.3°C | 25.0°C | 22.7°C | 30.1°C | 19.8°C | 70 mm | 72% | 3.7 m/s | 7.3 |
| 1986 | 26.5°C | 24.4°C | 22.3°C | 29.8°C | 18.6°C | 77 mm | 75% | 3.9 m/s | 7.1 |
| 1985 | 28.0°C | 25.7°C | 23.4°C | 31.1°C | 20.5°C | 136 mm | 76% | 3.6 m/s | 7 |
| 1984 | 27.4°C | 25.1°C | 22.9°C | 30.8°C | 20.9°C | 104 mm | 77% | 3.8 m/s | 6.7 |
| 1983 | 25.5°C | 23.5°C | 21.5°C | 29.0°C | 19.2°C | 107 mm | 72% | 3.9 m/s | — |
| 1982 | 26.8°C | 24.6°C | 22.4°C | 29.0°C | 20.4°C | 107 mm | 75% | 3.8 m/s | — |
| 1981 | 28.1°C | 26.0°C | 23.9°C | 31.4°C | 22.0°C | 112 mm | 78% | 3.2 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 27.1°C with lows near 23°C (mean 25.1°C), based on 45 years of NASA POWER data.
December averages 126 mm of rainfall in Hervey Bay, a relatively wet time of year. The wettest on record was 690 mm in 2010.
The hottest December reached 34.2°C in 2008. The coldest dipped to 18.6°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 0.4°C. Daytime highs moved from 27.2°C to 27.4°C and overnight lows from 22.8°C to 23.5°C over the same span.
December is one of the warmer months of the year in Hervey Bay and a relatively wet time of year, so plan for around 27.1°C daytime highs and 23°C at night.
Not quite — December is the 9th coolest month in Hervey Bay, averaging 25.1°C.
For December in Hervey Bay, pack light layers you can adjust through the day, with typical highs of 27.1°C and lows of 23°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 74% — moderately humid.
Average wind speed in December is 4 m/s. The windiest December on record averaged 4.8 m/s (2011).
The wettest December on record was 2010 with 690 mm. On average, December sees 126 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 Hervey Bay 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.
