December is one of the warmer months of the year in Oatlands, with average highs near 20.2°C and lows around 7.8°C (mean 14°C). It is about average for rainfall, averaging 62 mm of rainfall and 68% relative humidity across the period.
December is one of the warmer months of the year in Oatlands. Across 45 years of records, the warmest December in Oatlands was 2015 — when the month averaged 16.4°C — while the coldest was 1984 at 11°C. Typical December days reach 20.2°C with nights near 7.8°C. The long-term trend is warming, about 0.3°C per decade.
December is about average for rainfall in Oatlands, averaging 62 mm of rainfall. The wettest December on record was 1985 with 220 mm, while the driest was 1994 at 7 mm.
Relative humidity in Oatlands during December averages 68%. The most humid December was 1985 at 81%, and the least humid was 1994 at 58%.
December receives about 6.7 kWh/m²/day of solar energy in Oatlands. The sunniest December was 1994 at 7.9 kWh/m²/day, and the cloudiest was 1985 at 5.6.
Average wind speed in Oatlands during December is 2 m/s. The windiest Decembers were 2005, 2019 and 2025 at 2.4 m/s, while the calmest was 2011 at 1.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 13.5°C | 13.6°C | 14.0°C | 14.7°C | 14.1°C | +0.6°C |
| Avg High | 19.5°C | 19.7°C | 20.2°C | 21.1°C | 20.3°C | +0.8°C |
| Avg Low | 7.5°C | 7.4°C | 7.8°C | 8.3°C | 7.8°C | +0.3°C |
| Avg Rain | 75 mm | 69 mm | 49 mm | 52 mm | 66 mm | -9 mm |
December temperatures in Oatlands have risen by about 0.9°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 0.3°C (1995) to a record high of 36.4°C (2019).
Rainfall in December is about average for rainfall, averaging 62 mm, with a wettest year of 220 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.4°C per decade while lows rose 0.2°C per decade, widening the gap between day and night.
One of the best times to visit Oatlands
December is one of the best times to visit Oatlands. Expect days averaging 20.2°C and nights around 7.8°C (mean 14°C) — warmer than Oatlands's yearly average — with moderate rainfall (62 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 | 20.7°C | 13.9°C | 7.2°C | 30.2°C | 3.3°C | 27 mm | 61% | 2.4 m/s | — |
| 2024 | 21.5°C | 15.3°C | 9.1°C | 29.2°C | 5.3°C | 92 mm | 68% | 2.2 m/s | 6.8 |
| 2023 | 21.7°C | 15.2°C | 8.7°C | 29.2°C | 4.7°C | 60 mm | 65% | 1.8 m/s | 6.4 |
| 2022 | 18.0°C | 12.7°C | 7.3°C | 29.1°C | 3.4°C | 97 mm | 79% | 1.7 m/s | 6.4 |
| 2021 | 20.9°C | 14.2°C | 7.4°C | 30.2°C | 2.4°C | 28 mm | 65% | 1.9 m/s | 7.3 |
| 2020 | 19.1°C | 13.1°C | 7.1°C | 31.0°C | 3.4°C | 94 mm | 70% | 2.2 m/s | 6.5 |
| 2019 | 21.8°C | 14.9°C | 7.9°C | 36.4°C | 3.3°C | 26 mm | 60% | 2.4 m/s | 7.4 |
| 2018 | 22.7°C | 16.3°C | 9.9°C | 31.0°C | 4.2°C | 60 mm | 66% | 1.8 m/s | 6.8 |
| 2017 | 21.4°C | 15.2°C | 8.9°C | 31.3°C | 5.1°C | 111 mm | 67% | 2.2 m/s | 6.5 |
| 2016 | 21.2°C | 14.9°C | 8.5°C | 33.2°C | 4.0°C | 49 mm | 67% | 2.2 m/s | 6.9 |
| 2015 🔥 | 23.9°C | 16.4°C | 8.9°C | 34.5°C | 4.5°C | 29 mm | 60% | 2 m/s | 7.3 |
| 2014 | 21.0°C | 14.7°C | 8.4°C | 27.2°C | 5.1°C | 69 mm | 69% | 1.8 m/s | 6.1 |
| 2013 | 19.4°C | 13.6°C | 7.7°C | 30.0°C | 3.2°C | 30 mm | 73% | 1.9 m/s | 6.4 |
| 2012 | 21.3°C | 14.7°C | 8.1°C | 28.8°C | 2.7°C | 36 mm | 63% | 2.2 m/s | 6.8 |
| 2011 | 19.6°C | 13.7°C | 7.8°C | 27.6°C | 2.5°C | 56 mm | 73% | 1.6 m/s | 6.6 |
| 2010 | 18.5°C | 12.8°C | 7.1°C | 26.3°C | 3.0°C | 59 mm | 72% | 2.1 m/s | 6.1 |
| 2009 | 19.5°C | 13.5°C | 7.5°C | 30.9°C | 3.9°C | 55 mm | 73% | 1.9 m/s | 6.7 |
| 2008 | 18.5°C | 12.6°C | 6.6°C | 26.3°C | 2.0°C | 61 mm | 68% | 2.1 m/s | 6.5 |
| 2007 | 22.3°C | 15.4°C | 8.5°C | 33.6°C | 4.9°C | 54 mm | 63% | 2.1 m/s | 6.6 |
| 2006 | 20.6°C | 13.6°C | 6.6°C | 34.5°C | 3.1°C | 48 mm | 62% | 2.3 m/s | 7.2 |
| 2005 | 19.9°C | 14.3°C | 8.7°C | 26.9°C | 6.5°C | 76 mm | 72% | 2.4 m/s | 6.7 |
| 2004 | 20.6°C | 14.3°C | 8.0°C | 30.8°C | 3.4°C | 27 mm | 67% | 2.1 m/s | 6.9 |
| 2003 | 22.1°C | 15.2°C | 8.3°C | 31.7°C | 3.9°C | 49 mm | 66% | 2.2 m/s | 6.7 |
| 2002 | 21.7°C | 15.3°C | 8.9°C | 30.5°C | 3.9°C | 23 mm | 65% | 2.2 m/s | 6.8 |
| 2001 | 16.4°C | 11.5°C | 6.7°C | 23.2°C | 2.5°C | 60 mm | 77% | 1.7 m/s | 5.7 |
| 2000 | 20.8°C | 14.3°C | 7.9°C | 29.6°C | 3.2°C | 40 mm | 62% | 2.3 m/s | 7.3 |
| 1999 | 20.9°C | 14.4°C | 7.9°C | 31.7°C | 2.8°C | 46 mm | 64% | 2.3 m/s | 6.9 |
| 1998 | 21.2°C | 14.8°C | 8.4°C | 33.4°C | 4.6°C | 81 mm | 66% | 2.3 m/s | 7.1 |
| 1997 | 20.1°C | 13.8°C | 7.5°C | 28.6°C | 4.3°C | 27 mm | 64% | 2.2 m/s | 7.1 |
| 1996 | 18.3°C | 11.9°C | 5.5°C | 25.7°C | 0.9°C | 28 mm | 68% | 2.1 m/s | 7 |
| 1995 | 16.6°C | 11.1°C | 5.6°C | 24.5°C | 0.3°C | 139 mm | 74% | 2 m/s | 6.6 |
| 1994 | 23.8°C | 16.0°C | 8.2°C | 31.8°C | 2.2°C | 7 mm | 58% | 2 m/s | 7.9 |
| 1993 | 19.0°C | 13.3°C | 7.6°C | 29.1°C | 2.7°C | 177 mm | 72% | 2.3 m/s | 6.3 |
| 1992 | 19.5°C | 13.8°C | 8.1°C | 26.3°C | 4.1°C | 31 mm | 72% | 1.7 m/s | 5.9 |
| 1991 | 18.7°C | 13.2°C | 7.7°C | 26.3°C | 3.2°C | 91 mm | 74% | 1.8 m/s | 6.4 |
| 1990 | 19.3°C | 13.3°C | 7.3°C | 29.7°C | 2.4°C | 66 mm | 70% | 2.2 m/s | 6.5 |
| 1989 | 21.0°C | 14.5°C | 7.9°C | 31.7°C | 3.4°C | 39 mm | 64% | 2.1 m/s | 7.1 |
| 1988 | 21.4°C | 14.8°C | 8.3°C | 29.4°C | 3.5°C | 40 mm | 71% | 1.7 m/s | 6.7 |
| 1987 | 19.0°C | 12.7°C | 6.4°C | 28.4°C | 1.7°C | 54 mm | 69% | 1.9 m/s | 6.7 |
| 1986 | 18.5°C | 12.7°C | 6.9°C | 26.0°C | 4.3°C | 89 mm | 73% | 2.1 m/s | 6.5 |
| 1985 🌧️ | 17.9°C | 13.2°C | 8.6°C | 22.2°C | 4.0°C | 220 mm | 81% | 1.7 m/s | 5.6 |
| 1984 ❄️ | 15.9°C | 11.0°C | 6.0°C | 23.6°C | 2.1°C | 104 mm | 76% | 2.1 m/s | 6.2 |
| 1983 | 20.9°C | 14.3°C | 7.7°C | 31.2°C | 3.6°C | 19 mm | 65% | 1.8 m/s | — |
| 1982 | 20.3°C | 13.9°C | 7.4°C | 29.3°C | 2.8°C | 65 mm | 64% | 2.1 m/s | — |
| 1981 | 20.6°C | 14.5°C | 8.3°C | 27.2°C | 5.0°C | 48 mm | 68% | 1.8 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 20.2°C with lows near 7.8°C (mean 14°C), based on 45 years of NASA POWER data.
December averages 62 mm of rainfall in Oatlands, about average for rainfall. The wettest on record was 220 mm in 1985.
The hottest December reached 36.4°C in 2019. The coldest dipped to 0.3°C in 1995.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 0.9°C. Daytime highs moved from 19.1°C to 20.6°C and overnight lows from 7.6°C to 7.9°C over the same span.
December is one of the warmer months of the year in Oatlands and about average for rainfall, so plan for around 20.2°C daytime highs and 7.8°C at night.
Not quite — December is the 9th coolest month in Oatlands, averaging 14°C.
For December in Oatlands, pack warm layers and a jacket for chilly mornings, with typical highs of 20.2°C and lows of 7.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 68% — moderately humid.
Average wind speed in December is 2 m/s. The windiest December on record averaged 2.4 m/s (2005).
The wettest December on record was 1985 with 220 mm. On average, December sees 62 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 Oatlands 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.
