December is one of the warmer months of the year in Forster, with average highs near 26.4°C and lows around 18.9°C (mean 22.7°C). It is about average for rainfall, averaging 105 mm of rainfall and 71% relative humidity across the period.
December is one of the warmer months of the year in Forster. Across 45 years of records, the warmest December in Forster was 1990 — when the month averaged 25.5°C — while the coldest was 2011 at 19.8°C. Typical December days reach 26.4°C with nights near 18.9°C. The long-term trend is warming, about 0.2°C per decade.
December is about average for rainfall in Forster, averaging 105 mm of rainfall. The wettest December on record was 2020 with 315 mm, while the driest was 2019 at 22 mm.
Relative humidity in Forster during December averages 71%. The most humid December was 1992 at 79%, and the least humid was 2019 at 60%.
December receives about 6.8 kWh/m²/day of solar energy in Forster. The sunniest December was 2005 at 7.7 kWh/m²/day, and the cloudiest was 2020 at 5.5.
Average wind speed in Forster during December is 2.4 m/s. The windiest December was 1994 at 2.9 m/s, while the calmest were 1982, 1985 and 2023 at 2.1 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 | 22.9°C | 23.0°C | 23.0°C | +0.7°C |
| Avg High | 26.2°C | 26.0°C | 26.6°C | 26.7°C | 26.7°C | +0.5°C |
| Avg Low | 18.4°C | 18.6°C | 19.1°C | 19.2°C | 19.3°C | +0.9°C |
| Avg Rain | 99 mm | 112 mm | 100 mm | 105 mm | 114 mm | +15 mm |
December temperatures in Forster have risen by about 0.7°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 13.5°C (1995) to a record high of 38.8°C (1990).
Rainfall in December is about average for rainfall, averaging 105 mm, with a wettest year of 315 mm.
One of the best times to visit Forster
December is one of the best times to visit Forster. Expect days averaging 26.4°C and nights around 18.9°C (mean 22.7°C) — warmer than Forster's yearly average — with higher rainfall (105 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 | 27.6°C | 23.3°C | 19.1°C | 36.5°C | 14.1°C | 60 mm | 65% | 2.3 m/s | — |
| 2024 | 29.0°C | 24.7°C | 20.5°C | 33.7°C | 17.7°C | 33 mm | 68% | 2.2 m/s | 7.4 |
| 2023 | 28.7°C | 24.5°C | 20.3°C | 34.2°C | 17.5°C | 84 mm | 71% | 2.1 m/s | 7.1 |
| 2022 | 24.5°C | 20.9°C | 17.2°C | 29.8°C | 14.2°C | 50 mm | 67% | 2.5 m/s | 6.9 |
| 2021 | 25.1°C | 22.0°C | 19.0°C | 32.0°C | 15.4°C | 143 mm | 78% | 2.3 m/s | 6.7 |
| 2020 🌧️ | 25.5°C | 22.6°C | 19.7°C | 32.8°C | 17.0°C | 315 mm | 77% | 2.5 m/s | 5.5 |
| 2019 | 28.4°C | 24.2°C | 19.9°C | 35.4°C | 15.9°C | 22 mm | 60% | 2.5 m/s | 6.9 |
| 2018 | 28.2°C | 24.0°C | 19.8°C | 34.8°C | 17.1°C | 64 mm | 69% | 2.7 m/s | 7.4 |
| 2017 | 27.6°C | 23.8°C | 20.1°C | 35.9°C | 17.1°C | 166 mm | 72% | 2.2 m/s | 6.7 |
| 2016 | 28.8°C | 24.4°C | 20.1°C | 35.6°C | 17.3°C | 67 mm | 68% | 2.3 m/s | 6.9 |
| 2015 | 25.9°C | 22.3°C | 18.7°C | 34.6°C | 16.3°C | 184 mm | 71% | 2.5 m/s | 6.9 |
| 2014 | 26.5°C | 23.1°C | 19.6°C | 31.7°C | 17.2°C | 184 mm | 74% | 2.4 m/s | 6.2 |
| 2013 | 26.6°C | 22.3°C | 18.1°C | 34.4°C | 13.6°C | 31 mm | 69% | 2.3 m/s | 7.4 |
| 2012 | 27.3°C | 23.5°C | 19.6°C | 34.8°C | 15.8°C | 90 mm | 70% | 2.6 m/s | 6.5 |
| 2011 ❄️ | 22.5°C | 19.8°C | 17.1°C | 27.8°C | 14.3°C | 118 mm | 76% | 2.6 m/s | 6.1 |
| 2010 | 25.6°C | 22.5°C | 19.4°C | 29.7°C | 15.3°C | 124 mm | 75% | 2.4 m/s | 6.2 |
| 2009 | 26.9°C | 23.3°C | 19.7°C | 34.1°C | 15.6°C | 167 mm | 74% | 2.5 m/s | 6.2 |
| 2008 | 26.7°C | 22.7°C | 18.8°C | 32.0°C | 15.7°C | 93 mm | 70% | 2.3 m/s | 6.7 |
| 2007 | 24.3°C | 21.8°C | 19.2°C | 27.8°C | 16.4°C | 167 mm | 79% | 2.4 m/s | 6.3 |
| 2006 | 25.5°C | 21.8°C | 18.1°C | 31.7°C | 14.9°C | 83 mm | 69% | 2.6 m/s | 6.4 |
| 2005 | 29.4°C | 24.8°C | 20.3°C | 38.2°C | 16.1°C | 41 mm | 65% | 2.2 m/s | 7.7 |
| 2004 | 25.0°C | 21.6°C | 18.2°C | 36.2°C | 14.6°C | 93 mm | 73% | 2.5 m/s | 6.8 |
| 2003 | 26.9°C | 23.3°C | 19.7°C | 36.0°C | 16.7°C | 73 mm | 72% | 2.6 m/s | 6.6 |
| 2002 | 26.0°C | 22.3°C | 18.6°C | 36.0°C | 14.8°C | 159 mm | 69% | 2.5 m/s | 6.7 |
| 2001 | 27.7°C | 23.4°C | 19.1°C | 35.5°C | 16.5°C | 61 mm | 66% | 2.3 m/s | 6.7 |
| 2000 | 27.4°C | 23.5°C | 19.6°C | 33.6°C | 16.1°C | 64 mm | 69% | 2.3 m/s | 7 |
| 1999 | 24.5°C | 21.1°C | 17.7°C | 31.3°C | 15.8°C | 84 mm | 73% | 2.5 m/s | 6.7 |
| 1998 | 26.1°C | 22.6°C | 19.2°C | 31.3°C | 15.6°C | 56 mm | 74% | 2.2 m/s | 7 |
| 1997 | 29.0°C | 24.9°C | 20.8°C | 36.3°C | 18.4°C | 61 mm | 67% | 2.5 m/s | 6.9 |
| 1996 | 24.8°C | 21.2°C | 17.6°C | 28.9°C | 15.0°C | 83 mm | 74% | 2.5 m/s | 6.5 |
| 1995 | 24.2°C | 20.7°C | 17.2°C | 30.5°C | 13.5°C | 108 mm | 73% | 2.6 m/s | 6.3 |
| 1994 | 26.5°C | 22.6°C | 18.8°C | 34.7°C | 15.8°C | 107 mm | 70% | 2.9 m/s | 6.8 |
| 1993 | 26.2°C | 22.3°C | 18.4°C | 31.6°C | 15.1°C | 134 mm | 68% | 2.6 m/s | 6.8 |
| 1992 | 23.8°C | 21.0°C | 18.3°C | 31.4°C | 13.6°C | 191 mm | 79% | 2.5 m/s | 6.5 |
| 1991 | 24.6°C | 21.1°C | 17.5°C | 32.2°C | 14.3°C | 247 mm | 73% | 2.3 m/s | 6.6 |
| 1990 🔥 | 30.3°C | 25.5°C | 20.7°C | 38.8°C | 15.8°C | 50 mm | 65% | 2.3 m/s | 7.3 |
| 1989 | 25.2°C | 21.6°C | 18.1°C | 31.6°C | 16.0°C | 111 mm | 73% | 2.4 m/s | 6.9 |
| 1988 | 25.8°C | 22.6°C | 19.4°C | 31.5°C | 16.3°C | 158 mm | 77% | 2.5 m/s | 6.3 |
| 1987 | 26.3°C | 22.5°C | 18.7°C | 34.6°C | 14.5°C | 100 mm | 69% | 2.4 m/s | 6.6 |
| 1986 | 26.3°C | 22.0°C | 17.7°C | 32.2°C | 14.4°C | 23 mm | 63% | 2.6 m/s | 7.6 |
| 1985 | 27.0°C | 22.8°C | 18.6°C | 33.5°C | 13.8°C | 100 mm | 69% | 2.1 m/s | 6.8 |
| 1984 | 26.0°C | 21.8°C | 17.6°C | 32.3°C | 14.4°C | 126 mm | 67% | 2.3 m/s | 7.4 |
| 1983 | 24.9°C | 21.3°C | 17.6°C | 36.7°C | 14.7°C | 145 mm | 71% | 2.3 m/s | — |
| 1982 | 27.0°C | 22.8°C | 18.7°C | 32.9°C | 16.0°C | 52 mm | 67% | 2.1 m/s | — |
| 1981 | 27.7°C | 23.5°C | 19.3°C | 37.3°C | 16.9°C | 73 mm | 69% | 2.2 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 26.4°C with lows near 18.9°C (mean 22.7°C), based on 45 years of NASA POWER data.
December averages 105 mm of rainfall in Forster, about average for rainfall. The wettest on record was 315 mm in 2020.
The hottest December reached 38.8°C in 1990. The coldest dipped to 13.5°C in 1995.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 0.7°C. Daytime highs moved from 26.5°C to 27°C and overnight lows from 18.4°C to 19.2°C over the same span.
December is one of the warmer months of the year in Forster and about average for rainfall, so plan for around 26.4°C daytime highs and 18.9°C at night.
Not quite — December is the 10th coolest month in Forster, averaging 22.7°C.
For December in Forster, pack light layers you can adjust through the day, with typical highs of 26.4°C and lows of 18.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 71% — moderately humid.
Average wind speed in December is 2.4 m/s. The windiest December on record averaged 2.9 m/s (1994).
The wettest December on record was 2020 with 315 mm. On average, December sees 105 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 Forster 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.
