December is one of the warmer months of the year in Devonport, with average highs near 17.4°C and lows around 12.7°C (mean 15.1°C). It is one of the drier months, averaging 63 mm of rainfall and 76% relative humidity across the period.
December is one of the warmer months of the year in Devonport. Across 45 years of records, the warmest December in Devonport was 2018 — when the month averaged 16.8°C — while the coldest was 1996 at 13.1°C. Typical December days reach 17.4°C with nights near 12.7°C. The long-term trend is warming, about 0.2°C per decade.
December is one of the drier months in Devonport, averaging 63 mm of rainfall. The wettest December on record was 1986 with 189 mm, while the driest was 1994 at 10 mm.
Relative humidity in Devonport during December averages 76%. The most humid December was 1992 at 82%, and the least humid was 2000 at 70%.
December receives about 6.9 kWh/m²/day of solar energy in Devonport. The sunniest December was 1994 at 7.8 kWh/m²/day, and the cloudiest was 1985 at 6.1.
Average wind speed in Devonport during December is 3.8 m/s. The windiest December was 2005 at 4.6 m/s, while the calmest were 1988, 1994 and 2011, among others at 3.2 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 15.0°C | 14.7°C | 15.1°C | 15.5°C | 15.1°C | +0.1°C |
| Avg High | 17.4°C | 17.1°C | 17.4°C | 17.8°C | 17.4°C | 0°C |
| Avg Low | 12.5°C | 12.3°C | 12.7°C | 13.2°C | 12.9°C | +0.4°C |
| Avg Rain | 74 mm | 52 mm | 60 mm | 67 mm | 61 mm | -13 mm |
December temperatures in Devonport have stayed relatively stable across the record.
December has ranged from a record low of 7.7°C (1995) to a record high of 23.8°C (1982).
Rainfall in December is one of the drier months, averaging 63 mm, with a wettest year of 189 mm.
One of the best times to visit Devonport
December is one of the best times to visit Devonport. Expect days averaging 17.4°C and nights around 12.7°C (mean 15.1°C) — warmer than Devonport's yearly average — with moderate rainfall (63 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 | 16.5°C | 14.1°C | 11.6°C | 23.3°C | 9.0°C | 44 mm | 74% | 4.2 m/s | — |
| 2024 | 18.0°C | 15.8°C | 13.6°C | 22.0°C | 11.2°C | 77 mm | 78% | 4 m/s | 7 |
| 2023 | 18.4°C | 16.3°C | 14.1°C | 22.3°C | 11.9°C | 65 mm | 75% | 3.5 m/s | 6.8 |
| 2022 | 16.9°C | 14.8°C | 12.6°C | 20.3°C | 9.2°C | 56 mm | 78% | 3.4 m/s | 7.3 |
| 2021 | 17.6°C | 15.2°C | 12.9°C | 21.3°C | 10.3°C | 20 mm | 73% | 3.8 m/s | 7.7 |
| 2020 | 16.8°C | 14.6°C | 12.4°C | 22.1°C | 9.5°C | 102 mm | 77% | 4.1 m/s | 6.7 |
| 2019 | 17.3°C | 14.8°C | 12.3°C | 23.2°C | 8.7°C | 29 mm | 73% | 4.1 m/s | 7.6 |
| 2018 🔥 | 18.9°C | 16.8°C | 14.6°C | 22.0°C | 11.0°C | 84 mm | 77% | 3.6 m/s | 7.2 |
| 2017 | 18.6°C | 16.4°C | 14.2°C | 20.9°C | 11.3°C | 93 mm | 75% | 4.1 m/s | 6.6 |
| 2016 | 17.1°C | 15.0°C | 12.8°C | 21.3°C | 9.5°C | 99 mm | 80% | 3.8 m/s | 6.9 |
| 2015 | 18.8°C | 16.3°C | 13.8°C | 23.6°C | 9.7°C | 57 mm | 75% | 3.7 m/s | 7.5 |
| 2014 | 18.0°C | 15.6°C | 13.3°C | 20.7°C | 11.2°C | 55 mm | 77% | 3.7 m/s | 6.3 |
| 2013 | 17.4°C | 15.0°C | 12.6°C | 21.3°C | 9.3°C | 46 mm | 79% | 3.9 m/s | 6.7 |
| 2012 | 17.5°C | 15.1°C | 12.7°C | 20.5°C | 9.6°C | 65 mm | 76% | 3.9 m/s | 6.9 |
| 2011 | 17.6°C | 15.5°C | 13.3°C | 20.9°C | 9.2°C | 36 mm | 76% | 3.2 m/s | 7.1 |
| 2010 | 16.6°C | 14.4°C | 12.3°C | 21.5°C | 9.4°C | 102 mm | 79% | 4.3 m/s | 6.2 |
| 2009 | 17.6°C | 15.2°C | 12.8°C | 22.7°C | 10.9°C | 44 mm | 76% | 3.9 m/s | 6.9 |
| 2008 | 16.5°C | 14.2°C | 12.0°C | 19.5°C | 8.9°C | 77 mm | 74% | 4.3 m/s | 6.4 |
| 2007 | 18.0°C | 15.8°C | 13.6°C | 21.0°C | 11.3°C | 97 mm | 76% | 3.9 m/s | 6.3 |
| 2006 | 17.1°C | 14.5°C | 11.8°C | 23.1°C | 9.0°C | 20 mm | 72% | 4 m/s | 7.3 |
| 2005 | 17.3°C | 15.2°C | 13.1°C | 20.1°C | 11.0°C | 99 mm | 80% | 4.6 m/s | 6.6 |
| 2004 | 17.9°C | 15.5°C | 13.0°C | 20.3°C | 9.6°C | 35 mm | 76% | 3.6 m/s | 7.4 |
| 2003 | 18.1°C | 15.7°C | 13.3°C | 22.3°C | 10.8°C | 61 mm | 76% | 3.9 m/s | 6.8 |
| 2002 | 17.6°C | 15.3°C | 13.0°C | 21.8°C | 9.3°C | 69 mm | 77% | 3.7 m/s | 6.8 |
| 2001 | 16.0°C | 13.8°C | 11.6°C | 18.9°C | 8.2°C | 56 mm | 76% | 3.8 m/s | 6.4 |
| 2000 | 18.2°C | 15.7°C | 13.1°C | 20.9°C | 8.9°C | 38 mm | 70% | 4.2 m/s | 7.5 |
| 1999 | 18.5°C | 15.7°C | 12.8°C | 22.9°C | 9.6°C | 29 mm | 72% | 3.6 m/s | 7.5 |
| 1998 | 17.7°C | 15.2°C | 12.8°C | 21.5°C | 10.6°C | 79 mm | 77% | 3.7 m/s | 6.9 |
| 1997 | 16.7°C | 14.5°C | 12.4°C | 19.9°C | 10.0°C | 29 mm | 76% | 3.9 m/s | 7.3 |
| 1996 ❄️ | 15.4°C | 13.1°C | 10.8°C | 18.1°C | 8.1°C | 30 mm | 75% | 3.7 m/s | 7.3 |
| 1995 | 16.8°C | 14.0°C | 11.3°C | 19.8°C | 7.7°C | 52 mm | 74% | 3.5 m/s | 7.1 |
| 1994 | 18.0°C | 15.2°C | 12.5°C | 21.0°C | 8.7°C | 10 mm | 74% | 3.2 m/s | 7.8 |
| 1993 | 16.7°C | 14.3°C | 12.0°C | 19.4°C | 8.5°C | 123 mm | 78% | 4 m/s | 6.3 |
| 1992 | 16.8°C | 14.9°C | 13.1°C | 19.1°C | 10.8°C | 64 mm | 82% | 3.7 m/s | 6.3 |
| 1991 | 17.1°C | 14.8°C | 12.4°C | 21.8°C | 9.6°C | 53 mm | 77% | 3.4 m/s | 7 |
| 1990 | 17.4°C | 14.9°C | 12.5°C | 22.8°C | 10.1°C | 55 mm | 77% | 3.9 m/s | 6.7 |
| 1989 | 17.6°C | 15.2°C | 12.9°C | 21.0°C | 10.1°C | 45 mm | 75% | 3.9 m/s | 7.2 |
| 1988 | 17.7°C | 15.4°C | 13.0°C | 20.6°C | 9.6°C | 58 mm | 79% | 3.2 m/s | 7.1 |
| 1987 | 16.9°C | 14.4°C | 11.9°C | 20.7°C | 8.5°C | 45 mm | 74% | 3.4 m/s | 7 |
| 1986 🌧️ | 16.4°C | 14.2°C | 11.9°C | 18.5°C | 9.8°C | 189 mm | 78% | 3.8 m/s | 6.8 |
| 1985 | 18.1°C | 15.9°C | 13.8°C | 20.6°C | 11.2°C | 126 mm | 79% | 4.1 m/s | 6.1 |
| 1984 | 16.1°C | 13.6°C | 11.2°C | 18.8°C | 8.2°C | 73 mm | 77% | 4.3 m/s | 6.7 |
| 1983 | 18.1°C | 15.5°C | 12.9°C | 21.8°C | 10.5°C | 13 mm | 73% | 3.3 m/s | — |
| 1982 | 17.6°C | 15.0°C | 12.3°C | 23.8°C | 9.6°C | 86 mm | 73% | 3.4 m/s | — |
| 1981 | 18.2°C | 15.6°C | 13.0°C | 22.7°C | 10.6°C | 32 mm | 74% | 3.2 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 17.4°C with lows near 12.7°C (mean 15.1°C), based on 45 years of NASA POWER data.
December averages 63 mm of rainfall in Devonport, one of the drier months. The wettest on record was 189 mm in 1986.
The hottest December reached 23.8°C in 1982. The coldest dipped to 7.7°C in 1995.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 0.1°C — but days and nights have moved in opposite directions. Overnight lows rose from 12.6°C to 13°C while daytime highs eased from 17.6°C to 17.5°C, narrowing the gap between day and night.
December is one of the warmer months of the year in Devonport and one of the drier months, so plan for around 17.4°C daytime highs and 12.7°C at night.
Not quite — December is the 9th coolest month in Devonport, averaging 15.1°C.
For December in Devonport, pack light layers you can adjust through the day, with typical highs of 17.4°C and lows of 12.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 76% — quite humid.
Average wind speed in December is 3.8 m/s. The windiest December on record averaged 4.6 m/s (2005).
The wettest December on record was 1986 with 189 mm. On average, December sees 63 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 Devonport 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.
