December is one of the cooler months of the year in Mau, with average highs near 24.6°C and lows around 10°C (mean 17.3°C). It is one of the drier months, averaging 6 mm of rainfall and 52% relative humidity across the period.
December is one of the cooler months of the year in Mau. Across 45 years of records, the warmest December in Mau was 2015 — when the month averaged 19°C — while the coldest was 2019 at 14.5°C. Typical December days reach 24.6°C with nights near 10°C. The long-term trend is cooling, about 0.3°C per decade.
December is one of the drier months in Mau, averaging 6 mm of rainfall. The wettest December on record was 1997 with 44 mm, while the driest were 2017, 2022 and 2025, among others at 0 mm.
Relative humidity in Mau during December averages 52%. The most humid December was 2019 at 80%, and the least humid was 2015 at 33%.
December receives about 3.2 kWh/m²/day of solar energy in Mau. The sunniest Decembers were 1985, 1990 and 1992, among others at 3.9 kWh/m²/day, and the cloudiest was 2019 at 2.3.
Average wind speed in Mau during December is 1.4 m/s. The windiest December was 1982 at 2 m/s, while the calmest were 1987 and 1998 at 1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 17.7°C | 17.8°C | 17.3°C | 16.7°C | 16.9°C | -0.8°C |
| Avg High | 25.2°C | 25.4°C | 24.4°C | 23.9°C | 23.8°C | -1.4°C |
| Avg Low | 10.2°C | 10.2°C | 10.2°C | 9.6°C | 10.0°C | -0.2°C |
| Avg Rain | 11 mm | 8 mm | 2 mm | 4 mm | 4 mm | -7 mm |
December temperatures in Mau have fallen by about 0.9°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 1.5°C (2019) to a record high of 32.6°C (2015).
Rainfall in December is one of the drier months, averaging 6 mm, with a wettest year of 44 mm.
Daytime highs and overnight lows have shifted differently — highs fell about 0.5°C per decade while lows fell 0.1°C per decade, narrowing the gap between day and night.
A good time to visit Mau
December is a good time to visit Mau, with days averaging 24.6°C and nights around 10°C (mean 17.3°C, cooler than Mau's yearly average) and low rainfall. November and February are marginally more temperate, but December still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 21.5°C | 14.8°C | 8.1°C | 23.8°C | 5.8°C | 0 mm | 77% | 1.4 m/s | — |
| 2024 | 25.0°C | 17.9°C | 10.7°C | 28.2°C | 4.9°C | 0 mm | 58% | 1.5 m/s | 3 |
| 2023 | 25.6°C | 18.8°C | 12.1°C | 31.7°C | 8.2°C | 6 mm | 57% | 1.5 m/s | 2.7 |
| 2022 | 23.9°C | 16.6°C | 9.4°C | 27.1°C | 5.8°C | 0 mm | 67% | 1.6 m/s | 3.1 |
| 2021 | 21.8°C | 15.8°C | 9.9°C | 26.3°C | 3.4°C | 16 mm | 79% | 1.6 m/s | 3 |
| 2020 | 24.8°C | 17.3°C | 9.8°C | 28.4°C | 4.6°C | 2 mm | 54% | 1.8 m/s | 2.7 |
| 2019 ❄️ | 20.2°C | 14.5°C | 8.8°C | 24.8°C | 1.5°C | 25 mm | 80% | 1.5 m/s | 2.3 |
| 2018 | 24.5°C | 17.2°C | 9.9°C | 27.5°C | 4.3°C | 0 mm | 49% | 1.5 m/s | 3 |
| 2017 | 26.1°C | 18.8°C | 11.6°C | 30.0°C | 7.7°C | 0 mm | 47% | 1.4 m/s | 3.1 |
| 2016 | 23.3°C | 16.0°C | 8.8°C | 25.9°C | 6.0°C | 0 mm | 67% | 1.5 m/s | 2.5 |
| 2015 🔥 | 26.5°C | 19.0°C | 11.6°C | 32.6°C | 6.8°C | 1 mm | 33% | 1.4 m/s | 2.7 |
| 2014 | 23.1°C | 15.5°C | 7.8°C | 28.2°C | 4.2°C | 15 mm | 53% | 1.6 m/s | 2.7 |
| 2013 | 24.4°C | 17.2°C | 10.0°C | 26.4°C | 7.4°C | 0 mm | 62% | 1.5 m/s | 3 |
| 2012 | 23.4°C | 15.7°C | 8.1°C | 26.5°C | 4.0°C | 0 mm | 55% | 1.8 m/s | 3 |
| 2011 | 23.5°C | 16.6°C | 9.7°C | 27.3°C | 5.1°C | 0 mm | 56% | 1.1 m/s | 2.7 |
| 2010 | 23.7°C | 16.7°C | 9.7°C | 27.5°C | 4.9°C | 3 mm | 57% | 1.3 m/s | 3.4 |
| 2009 | 25.0°C | 17.8°C | 10.6°C | 28.2°C | 5.9°C | 4 mm | 53% | 1.5 m/s | 3.2 |
| 2008 | 23.2°C | 17.3°C | 11.3°C | 26.6°C | 7.6°C | 0 mm | 74% | 1.1 m/s | 2.7 |
| 2007 | 22.0°C | 15.2°C | 8.3°C | 24.3°C | 3.7°C | 0 mm | 64% | 1.3 m/s | 3.3 |
| 2006 | 25.7°C | 18.5°C | 11.3°C | 29.7°C | 7.4°C | 2 mm | 50% | 1.4 m/s | 3.4 |
| 2005 | 24.4°C | 16.8°C | 9.2°C | 27.8°C | 6.0°C | 2 mm | 50% | 1.3 m/s | 3.5 |
| 2004 | 25.6°C | 18.7°C | 11.7°C | 29.0°C | 5.4°C | 0 mm | 46% | 1.2 m/s | 3 |
| 2003 | 24.7°C | 17.7°C | 10.6°C | 29.0°C | 5.9°C | 3 mm | 55% | 1.3 m/s | 3.3 |
| 2002 | 25.4°C | 18.2°C | 11.0°C | 27.5°C | 7.6°C | 12 mm | 42% | 1.3 m/s | 3.2 |
| 2001 | 23.4°C | 16.2°C | 9.0°C | 25.1°C | 5.9°C | 0 mm | 52% | 1.1 m/s | 3 |
| 2000 | 24.3°C | 16.6°C | 8.9°C | 26.5°C | 6.4°C | 0 mm | 42% | 1.2 m/s | 3.8 |
| 1999 | 26.5°C | 18.6°C | 10.6°C | 29.1°C | 6.9°C | 1 mm | 38% | 1.2 m/s | 3.5 |
| 1998 | 24.1°C | 16.8°C | 9.6°C | 25.7°C | 6.0°C | 0 mm | 50% | 1 m/s | 3.5 |
| 1997 🌧️ | 22.7°C | 16.7°C | 10.7°C | 28.4°C | 5.1°C | 44 mm | 66% | 1.4 m/s | 2.7 |
| 1996 | 24.6°C | 16.2°C | 7.9°C | 27.0°C | 3.3°C | 0 mm | 43% | 1.4 m/s | 3.5 |
| 1995 | 25.9°C | 18.3°C | 10.7°C | 28.4°C | 6.4°C | 25 mm | 46% | 1.5 m/s | 3.3 |
| 1994 | 26.6°C | 18.1°C | 9.7°C | 30.2°C | 4.9°C | 0 mm | 33% | 1.4 m/s | 3.8 |
| 1993 | 25.2°C | 17.5°C | 9.9°C | 27.8°C | 6.5°C | 0 mm | 36% | 1.1 m/s | 3.5 |
| 1992 | 26.5°C | 18.8°C | 11.2°C | 28.7°C | 8.2°C | 0 mm | 38% | 1.3 m/s | 3.9 |
| 1991 | 25.7°C | 18.3°C | 11.0°C | 28.1°C | 6.6°C | 12 mm | 46% | 1.5 m/s | 3.5 |
| 1990 | 26.2°C | 18.3°C | 10.4°C | 27.8°C | 6.1°C | 0 mm | 45% | 1.5 m/s | 3.9 |
| 1989 | 25.8°C | 18.1°C | 10.5°C | 29.1°C | 7.3°C | 11 mm | 35% | 1.3 m/s | 3.4 |
| 1988 | 26.1°C | 18.7°C | 11.4°C | 28.8°C | 8.2°C | 21 mm | 42% | 1.3 m/s | 3.6 |
| 1987 | 22.9°C | 15.8°C | 8.8°C | 25.0°C | 5.4°C | 3 mm | 60% | 1 m/s | 3.6 |
| 1986 | 25.3°C | 18.4°C | 11.5°C | 28.5°C | 6.8°C | 32 mm | 46% | 1.4 m/s | 3.5 |
| 1985 | 24.0°C | 17.0°C | 10.0°C | 27.6°C | 6.3°C | 2 mm | 70% | 1.7 m/s | 3.9 |
| 1984 | 26.5°C | 18.0°C | 9.4°C | 28.7°C | 3.3°C | 3 mm | 39% | 1.7 m/s | 3.9 |
| 1983 | 26.5°C | 18.7°C | 11.0°C | 29.5°C | 7.2°C | 13 mm | 39% | 1.6 m/s | — |
| 1982 | 26.3°C | 18.4°C | 10.4°C | 29.7°C | 7.4°C | 2 mm | 45% | 2 m/s | — |
| 1981 | 23.7°C | 16.5°C | 9.2°C | 25.5°C | 6.7°C | 8 mm | 60% | 1.4 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 24.6°C with lows near 10°C (mean 17.3°C), based on 45 years of NASA POWER data.
December averages 6 mm of rainfall in Mau, one of the drier months. The wettest on record was 44 mm in 1997.
The hottest December reached 32.6°C in 2015. The coldest dipped to 1.5°C in 2019.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have fallen by about 0.9°C. Daytime highs moved from 25.4°C to 23.6°C and overnight lows from 10°C to 10°C over the same span.
December is one of the cooler months of the year in Mau and one of the drier months, so plan for around 24.6°C daytime highs and 10°C at night.
Not quite — December is the 2nd coolest month in Mau, averaging 17.3°C.
For December in Mau, pack light layers you can adjust through the day, with typical highs of 24.6°C and lows of 10°C.
Relative humidity in December averages 52% — relatively dry.
Average wind speed in December is 1.4 m/s. The windiest December on record averaged 2 m/s (1982).
The wettest December on record was 1997 with 44 mm. On average, December sees 6 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 Mau 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.
