December is one of the warmer months of the year in Coffs Harbour, with average highs near 25.3°C and lows around 20°C (mean 22.7°C). It is a relatively wet time of year, averaging 137 mm of rainfall and 75% relative humidity across the period.
December is one of the warmer months of the year in Coffs Harbour. Across 45 years of records, the warmest December in Coffs Harbour was 1990 — when the month averaged 25.1°C — while the coldest was 2011 at 20.2°C. Typical December days reach 25.3°C with nights near 20°C. The long-term trend is warming, about 0.2°C per decade.
December is a relatively wet time of year in Coffs Harbour, averaging 137 mm of rainfall. The wettest December on record was 2020 with 544 mm, while the driest was 2013 at 31 mm.
Relative humidity in Coffs Harbour during December averages 75%. The most humid December was 2021 at 82%, and the least humid was 2001 at 69%.
December receives about 6.8 kWh/m²/day of solar energy in Coffs Harbour. The sunniest December was 2005 at 7.8 kWh/m²/day, and the cloudiest was 2020 at 5.2.
Average wind speed in Coffs Harbour during December is 3.4 m/s. The windiest Decembers were 1994 and 2018 at 3.9 m/s, while the calmest was 2023 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 22.3°C | 22.3°C | 23.0°C | 22.8°C | 22.8°C | +0.5°C |
| Avg High | 25.1°C | 25.0°C | 25.8°C | 25.4°C | 25.4°C | +0.3°C |
| Avg Low | 19.6°C | 19.7°C | 20.3°C | 20.2°C | 20.3°C | +0.7°C |
| Avg Rain | 138 mm | 140 mm | 101 mm | 121 mm | 216 mm | +78 mm |
December temperatures in Coffs Harbour have risen by about 0.4°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 14.4°C (1995) to a record high of 35.1°C (1990).
Rainfall in December is a relatively wet time of year, averaging 137 mm, with a wettest year of 544 mm.
One of the best times to visit Coffs Harbour
December is one of the best times to visit Coffs Harbour. Expect days averaging 25.3°C and nights around 20°C (mean 22.7°C) — warmer than Coffs Harbour's yearly average — with higher rainfall (137 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 25.9°C | 22.9°C | 19.9°C | 31.6°C | 16.7°C | 106 mm | 73% | 3.5 m/s | — |
| 2024 | 26.9°C | 24.2°C | 21.5°C | 31.5°C | 18.2°C | 121 mm | 78% | 3.2 m/s | 7.5 |
| 2023 | 26.9°C | 24.0°C | 21.1°C | 30.9°C | 18.8°C | 149 mm | 77% | 2.9 m/s | 7.1 |
| 2022 | 23.5°C | 20.9°C | 18.3°C | 28.1°C | 15.6°C | 115 mm | 74% | 3.3 m/s | 6.9 |
| 2021 | 24.0°C | 22.1°C | 20.3°C | 28.6°C | 17.1°C | 262 mm | 82% | 3.1 m/s | 6.6 |
| 2020 🌧️ | 25.2°C | 23.0°C | 20.8°C | 31.4°C | 17.8°C | 544 mm | 81% | 3.6 m/s | 5.2 |
| 2019 | 26.5°C | 23.4°C | 20.4°C | 31.1°C | 16.8°C | 64 mm | 70% | 3.3 m/s | 7.1 |
| 2018 | 26.1°C | 23.3°C | 20.5°C | 31.4°C | 18.6°C | 93 mm | 74% | 3.9 m/s | 7.5 |
| 2017 | 26.3°C | 23.6°C | 20.9°C | 30.8°C | 17.9°C | 147 mm | 77% | 3.4 m/s | 7 |
| 2016 | 27.1°C | 24.0°C | 20.8°C | 32.7°C | 18.4°C | 60 mm | 73% | 3.6 m/s | 7 |
| 2015 | 24.8°C | 22.4°C | 19.9°C | 31.3°C | 17.5°C | 158 mm | 75% | 3.5 m/s | 6.7 |
| 2014 | 25.7°C | 23.1°C | 20.5°C | 30.8°C | 18.4°C | 217 mm | 78% | 3.6 m/s | 5.9 |
| 2013 | 25.2°C | 22.1°C | 19.1°C | 31.2°C | 15.2°C | 31 mm | 73% | 3.3 m/s | 7.1 |
| 2012 | 26.0°C | 23.4°C | 20.8°C | 30.7°C | 18.2°C | 88 mm | 74% | 3.4 m/s | 6.8 |
| 2011 ❄️ | 22.1°C | 20.2°C | 18.4°C | 25.3°C | 15.8°C | 134 mm | 78% | 3.5 m/s | 6.3 |
| 2010 | 23.9°C | 22.1°C | 20.4°C | 26.9°C | 16.0°C | 214 mm | 81% | 3 m/s | 5.6 |
| 2009 | 25.7°C | 23.2°C | 20.7°C | 29.9°C | 16.6°C | 153 mm | 79% | 3.3 m/s | 6.6 |
| 2008 | 25.9°C | 23.0°C | 20.0°C | 30.6°C | 17.7°C | 108 mm | 73% | 3.4 m/s | 6.5 |
| 2007 | 24.2°C | 22.3°C | 20.4°C | 27.3°C | 18.5°C | 118 mm | 78% | 3.3 m/s | 6.5 |
| 2006 | 24.6°C | 21.8°C | 19.1°C | 29.7°C | 17.6°C | 65 mm | 71% | 3.6 m/s | 6.6 |
| 2005 | 27.8°C | 24.6°C | 21.3°C | 34.1°C | 18.2°C | 81 mm | 72% | 3.3 m/s | 7.8 |
| 2004 | 24.9°C | 22.2°C | 19.6°C | 32.3°C | 15.3°C | 89 mm | 74% | 3.6 m/s | 6.6 |
| 2003 | 25.8°C | 23.0°C | 20.3°C | 32.1°C | 16.4°C | 101 mm | 75% | 3.6 m/s | 6.7 |
| 2002 | 25.8°C | 22.9°C | 20.0°C | 32.8°C | 17.0°C | 106 mm | 70% | 3.4 m/s | 7.3 |
| 2001 | 27.4°C | 24.1°C | 20.8°C | 33.5°C | 17.5°C | 43 mm | 69% | 3.6 m/s | 6.6 |
| 2000 | 25.8°C | 23.1°C | 20.5°C | 29.9°C | 17.6°C | 150 mm | 75% | 3.4 m/s | 6.8 |
| 1999 | 23.3°C | 21.0°C | 18.7°C | 28.2°C | 17.3°C | 110 mm | 76% | 3.3 m/s | 6.9 |
| 1998 | 25.2°C | 22.8°C | 20.5°C | 28.9°C | 17.0°C | 100 mm | 77% | 3.2 m/s | 7.2 |
| 1997 | 27.5°C | 24.6°C | 21.7°C | 32.6°C | 19.1°C | 78 mm | 73% | 3.4 m/s | 7 |
| 1996 | 23.8°C | 21.4°C | 19.0°C | 28.7°C | 15.8°C | 109 mm | 79% | 3.3 m/s | 6.6 |
| 1995 | 24.3°C | 21.3°C | 18.4°C | 28.4°C | 14.4°C | 131 mm | 75% | 3.5 m/s | 7 |
| 1994 | 25.1°C | 22.3°C | 19.6°C | 30.8°C | 16.3°C | 179 mm | 75% | 3.9 m/s | 7.1 |
| 1993 | 24.6°C | 21.9°C | 19.2°C | 29.7°C | 15.9°C | 170 mm | 73% | 3.4 m/s | 6.9 |
| 1992 | 23.8°C | 21.6°C | 19.4°C | 29.4°C | 15.9°C | 156 mm | 79% | 3.8 m/s | 6.7 |
| 1991 | 23.7°C | 21.4°C | 19.0°C | 28.5°C | 16.7°C | 306 mm | 79% | 3.4 m/s | 6.6 |
| 1990 🔥 | 28.6°C | 25.1°C | 21.7°C | 35.1°C | 18.6°C | 62 mm | 69% | 3.5 m/s | 7.3 |
| 1989 | 24.1°C | 21.7°C | 19.2°C | 29.0°C | 16.8°C | 114 mm | 77% | 3.5 m/s | 6.7 |
| 1988 | 24.4°C | 22.4°C | 20.3°C | 30.0°C | 17.7°C | 228 mm | 81% | 3.7 m/s | 6.5 |
| 1987 | 25.8°C | 23.0°C | 20.1°C | 30.7°C | 16.7°C | 115 mm | 72% | 3.5 m/s | 6.5 |
| 1986 | 25.2°C | 22.1°C | 19.0°C | 30.9°C | 15.1°C | 51 mm | 69% | 3.4 m/s | 7.5 |
| 1985 | 25.9°C | 22.9°C | 19.9°C | 31.0°C | 16.3°C | 119 mm | 74% | 3.5 m/s | 6.9 |
| 1984 | 25.1°C | 22.0°C | 19.0°C | 29.8°C | 15.3°C | 135 mm | 72% | 3.3 m/s | 6.8 |
| 1983 | 23.1°C | 20.9°C | 18.7°C | 30.7°C | 16.1°C | 220 mm | 77% | 3.2 m/s | — |
| 1982 | 25.4°C | 22.5°C | 19.6°C | 28.8°C | 16.5°C | 134 mm | 75% | 3.3 m/s | — |
| 1981 | 26.5°C | 23.5°C | 20.6°C | 33.7°C | 17.8°C | 126 mm | 75% | 3.4 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 25.3°C with lows near 20°C (mean 22.7°C), based on 45 years of NASA POWER data.
December averages 137 mm of rainfall in Coffs Harbour, a relatively wet time of year. The wettest on record was 544 mm in 2020.
The hottest December reached 35.1°C in 1990. The coldest dipped to 14.4°C in 1995.
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 25.2°C to 25.4°C and overnight lows from 19.6°C to 20.2°C over the same span.
December is one of the warmer months of the year in Coffs Harbour and a relatively wet time of year, so plan for around 25.3°C daytime highs and 20°C at night.
Not quite — December is the 10th coolest month in Coffs Harbour, averaging 22.7°C.
For December in Coffs Harbour, pack light layers you can adjust through the day, with typical highs of 25.3°C and lows of 20°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 75% — quite humid.
Average wind speed in December is 3.4 m/s. The windiest December on record averaged 3.9 m/s (1994).
The wettest December on record was 2020 with 544 mm. On average, December sees 137 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 Coffs Harbour 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.
