December is one of the cooler months of the year in Orange, with average highs near 16.7°C and lows around 8.8°C (mean 12.8°C). It is about average for rainfall, averaging 128 mm of rainfall and 84% relative humidity across the period.
December is one of the cooler months of the year in Orange. Across 45 years of records, the warmest December in Orange was 2021 — when the month averaged 18.2°C — while the coldest was 1989 at 8.2°C. Typical December days reach 16.7°C with nights near 8.8°C. The long-term trend is warming, about 0.4°C per decade.
December is about average for rainfall in Orange, averaging 128 mm of rainfall. The wettest December on record was 1982 with 337 mm, while the driest was 2013 at 40 mm.
Relative humidity in Orange during December averages 84%. The most humid December was 1984 at 90%, and the least humid was 2010 at 75%.
December receives about 2.5 kWh/m²/day of solar energy in Orange. The sunniest Decembers were 2003 and 2023 at 3.1 kWh/m²/day, and the cloudiest was 1992 at 1.9.
Average wind speed in Orange during December is 2.5 m/s. The windiest December was 1983 at 2.9 m/s, while the calmest was 2025 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 11.9°C | 13.0°C | 11.9°C | 13.2°C | 14.4°C | +2.5°C |
| Avg High | 15.7°C | 16.8°C | 15.9°C | 17.1°C | 18.4°C | +2.7°C |
| Avg Low | 8.1°C | 9.3°C | 7.8°C | 9.2°C | 10.3°C | +2.2°C |
| Avg Rain | 140 mm | 130 mm | 117 mm | 132 mm | 122 mm | -17 mm |
December temperatures in Orange have risen by about 2.4°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -7.5°C (1989) to a record high of 25.4°C (1994).
Rainfall in December is about average for rainfall, averaging 128 mm, with a wettest year of 337 mm.
A quieter season to visit Orange
If your dates are flexible, the more temperate months of October and April tend to be the most comfortable for visiting Orange. That said, December — with days averaging 16.7°C and nights around 8.8°C (mean 12.8°C) and higher rainfall (128 mm) — can still be rewarding for travellers who don't mind the cooler conditions, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 18.1°C | 14.0°C | 9.8°C | 24.6°C | -0.9°C | 107 mm | 85% | 2.1 m/s | — |
| 2024 | 18.8°C | 14.7°C | 10.5°C | 23.3°C | 3.7°C | 147 mm | 84% | 2.3 m/s | 2.7 |
| 2023 | 17.6°C | 13.3°C | 9.0°C | 24.1°C | 1.8°C | 87 mm | 81% | 2.2 m/s | 3.1 |
| 2022 | 17.4°C | 13.5°C | 9.7°C | 24.9°C | -6.5°C | 176 mm | 85% | 2.2 m/s | 2.4 |
| 2021 🔥 | 21.7°C | 18.2°C | 14.7°C | 25.3°C | 5.2°C | 54 mm | 89% | 2.2 m/s | 2.4 |
| 2020 | 16.7°C | 12.5°C | 8.3°C | 20.9°C | 1.8°C | 162 mm | 86% | 2.5 m/s | 2.7 |
| 2019 | 17.8°C | 13.3°C | 8.8°C | 23.9°C | 2.1°C | 44 mm | 82% | 2.2 m/s | 2.9 |
| 2018 | 16.4°C | 12.8°C | 9.2°C | 22.9°C | 3.4°C | 212 mm | 87% | 2.6 m/s | 2.4 |
| 2017 | 15.9°C | 11.9°C | 7.9°C | 24.4°C | 0.5°C | 153 mm | 84% | 2.4 m/s | 2.2 |
| 2016 | 18.3°C | 14.5°C | 10.7°C | 24.5°C | 0.3°C | 313 mm | 85% | 2.6 m/s | 2.3 |
| 2015 | 18.8°C | 15.3°C | 11.8°C | 24.9°C | 5.0°C | 114 mm | 87% | 2.6 m/s | 2.6 |
| 2014 | 17.4°C | 13.6°C | 9.8°C | 23.4°C | 3.4°C | 99 mm | 87% | 2.2 m/s | 2.2 |
| 2013 | 14.7°C | 10.9°C | 7.2°C | 23.8°C | 0.8°C | 40 mm | 85% | 2.4 m/s | 2.3 |
| 2012 | 19.4°C | 14.8°C | 10.3°C | 24.9°C | 1.0°C | 131 mm | 80% | 2.5 m/s | 2.7 |
| 2011 | 16.2°C | 12.5°C | 8.7°C | 22.8°C | -0.2°C | 127 mm | 85% | 2.5 m/s | 2.3 |
| 2010 | 16.4°C | 12.2°C | 7.9°C | 23.4°C | -0.3°C | 86 mm | 75% | 2.7 m/s | 2.8 |
| 2009 | 13.9°C | 10.2°C | 6.4°C | 22.6°C | -0.6°C | 177 mm | 85% | 2.7 m/s | 2.2 |
| 2008 | 16.9°C | 12.8°C | 8.7°C | 22.2°C | 0.6°C | 83 mm | 83% | 2.8 m/s | 2.3 |
| 2007 | 18.5°C | 14.2°C | 9.8°C | 24.1°C | 1.0°C | 76 mm | 84% | 2.4 m/s | 2.7 |
| 2006 | 15.6°C | 11.9°C | 8.1°C | 21.4°C | -0.9°C | 134 mm | 84% | 2.5 m/s | 2.7 |
| 2005 | 15.8°C | 11.6°C | 7.3°C | 24.4°C | 2.4°C | 85 mm | 80% | 2.5 m/s | 2.8 |
| 2004 | 15.6°C | 11.6°C | 7.7°C | 22.4°C | -1.0°C | 81 mm | 82% | 2.5 m/s | 2.8 |
| 2003 | 16.0°C | 11.4°C | 6.9°C | 21.2°C | 1.1°C | 106 mm | 81% | 2.6 m/s | 3.1 |
| 2002 | 15.8°C | 12.2°C | 8.6°C | 21.1°C | 0.9°C | 236 mm | 86% | 2.7 m/s | 2.4 |
| 2001 | 17.6°C | 13.9°C | 10.3°C | 23.8°C | 2.8°C | 125 mm | 83% | 2.5 m/s | 2.7 |
| 2000 | 13.3°C | 9.0°C | 4.6°C | 21.6°C | -1.6°C | 64 mm | 82% | 2.8 m/s | 2.4 |
| 1999 | 17.3°C | 12.7°C | 8.0°C | 23.4°C | 0.9°C | 122 mm | 79% | 2.6 m/s | 3 |
| 1998 | 17.3°C | 13.7°C | 10.1°C | 25.4°C | -0.5°C | 114 mm | 87% | 2.6 m/s | 2.4 |
| 1997 | 15.1°C | 11.2°C | 7.2°C | 21.4°C | 1.1°C | 153 mm | 82% | 2.6 m/s | 2.9 |
| 1996 | 17.4°C | 13.7°C | 10.0°C | 23.5°C | -3.4°C | 86 mm | 85% | 2.4 m/s | 2.5 |
| 1995 | 16.1°C | 12.4°C | 8.6°C | 24.5°C | -1.9°C | 188 mm | 84% | 2.5 m/s | 2.5 |
| 1994 | 17.1°C | 13.5°C | 10.0°C | 25.4°C | 2.9°C | 160 mm | 87% | 2.2 m/s | 2.2 |
| 1993 | 15.6°C | 11.9°C | 8.2°C | 23.1°C | 0.5°C | 84 mm | 83% | 2.5 m/s | 2.5 |
| 1992 | 17.2°C | 13.7°C | 10.3°C | 22.2°C | 5.0°C | 139 mm | 88% | 2.3 m/s | 1.9 |
| 1991 | 17.2°C | 14.0°C | 10.9°C | 24.7°C | 3.7°C | 157 mm | 86% | 2.6 m/s | 2.3 |
| 1990 | 17.5°C | 13.4°C | 9.3°C | 23.8°C | -4.8°C | 100 mm | 83% | 2.5 m/s | 2.3 |
| 1989 ❄️ | 12.6°C | 8.2°C | 3.8°C | 22.4°C | -7.5°C | 72 mm | 77% | 2.6 m/s | 2.7 |
| 1988 | 17.6°C | 13.4°C | 9.1°C | 23.0°C | 2.3°C | 139 mm | 80% | 2.4 m/s | 2.5 |
| 1987 | 17.1°C | 13.4°C | 9.7°C | 22.8°C | 0.6°C | 140 mm | 86% | 2.5 m/s | 2.2 |
| 1986 | 13.8°C | 10.7°C | 7.6°C | 21.5°C | 3.0°C | 192 mm | 87% | 2.4 m/s | 2.2 |
| 1985 | 14.3°C | 10.1°C | 5.8°C | 21.5°C | -3.3°C | 81 mm | 82% | 2.4 m/s | 2.9 |
| 1984 | 19.4°C | 16.4°C | 13.4°C | 23.6°C | -0.4°C | 73 mm | 90% | 2.5 m/s | 2.2 |
| 1983 | 12.7°C | 8.8°C | 4.8°C | 23.7°C | -6.8°C | 137 mm | 83% | 2.9 m/s | — |
| 1982 🌧️ | 17.4°C | 14.0°C | 10.6°C | 23.9°C | -0.6°C | 337 mm | 86% | 2.8 m/s | — |
| 1981 | 16.6°C | 12.4°C | 8.1°C | 22.9°C | -1.1°C | 87 mm | 79% | 2.7 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 16.7°C with lows near 8.8°C (mean 12.8°C), based on 45 years of NASA POWER data.
December averages 128 mm of rainfall in Orange, about average for rainfall. The wettest on record was 337 mm in 1982.
The hottest December reached 25.4°C in 1994. The coldest dipped to -7.5°C in 1989.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 2.4°C. Daytime highs moved from 16.1°C to 18.7°C and overnight lows from 8.5°C to 10.7°C over the same span.
December is one of the cooler months of the year in Orange and about average for rainfall, so plan for around 16.7°C daytime highs and 8.8°C at night.
Not quite — December is the 2nd coolest month in Orange, averaging 12.8°C.
For December in Orange, pack light layers you can adjust through the day, with typical highs of 16.7°C and lows of 8.8°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 84% — quite humid.
Average wind speed in December is 2.5 m/s. The windiest December on record averaged 2.9 m/s (1983).
The wettest December on record was 1982 with 337 mm. On average, December sees 128 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 Orange 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.
