December is one of the cooler months of the year in Roseville, with average highs near 13.4°C and lows around 4°C (mean 8.7°C). It is a relatively wet time of year, averaging 141 mm of rainfall and 71% relative humidity across the period.
December is one of the cooler months of the year in Roseville. Across 45 years of records, the warmest December in Roseville was 2023 — when the month averaged 11.6°C — while the coldest was 1992 at 6.5°C. Typical December days reach 13.4°C with nights near 4°C. The long-term trend is warming, about 0.2°C per decade.
December is a relatively wet time of year in Roseville, averaging 141 mm of rainfall. The wettest December on record was 2005 with 355 mm, while the driest was 1989 at 1 mm.
Relative humidity in Roseville during December averages 71%. The most humid December was 1983 at 88%, and the least humid was 2011 at 48%.
December receives about 2 kWh/m²/day of solar energy in Roseville. The sunniest December was 2013 at 2.7 kWh/m²/day, and the cloudiest were 1995, 2002 and 2010 at 1.6.
Average wind speed in Roseville during December is 1.5 m/s. The windiest December was 1996 at 2.3 m/s, while the calmest were 2011, 2013 and 2017, among others at 1.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 8.6°C | 8.5°C | 8.3°C | 8.8°C | 9.6°C | +1°C |
| Avg High | 13.5°C | 13.5°C | 12.7°C | 13.5°C | 14.0°C | +0.5°C |
| Avg Low | 3.8°C | 3.5°C | 3.9°C | 4.2°C | 5.2°C | +1.4°C |
| Avg Rain | 115 mm | 124 mm | 171 mm | 128 mm | 176 mm | +62 mm |
December temperatures in Roseville have risen by about 1.3°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -7.9°C (1990) to a record high of 24°C (2021).
Rainfall in December is a relatively wet time of year, averaging 141 mm, with a wettest year of 355 mm.
A quieter season to visit Roseville
If your dates are flexible, the more temperate months of June and September tend to be the most comfortable for visiting Roseville. That said, December — with days averaging 13.4°C and nights around 4°C (mean 8.7°C) and higher rainfall (141 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 | 14.7°C | 10.6°C | 6.5°C | 18.0°C | 1.8°C | 192 mm | 81% | 1.4 m/s | — |
| 2024 | 14.7°C | 10.5°C | 6.3°C | 19.7°C | 1.5°C | 160 mm | 75% | 1.5 m/s | 1.9 |
| 2023 🔥 | 16.2°C | 11.6°C | 7.0°C | 21.7°C | 2.1°C | 106 mm | 69% | 1.2 m/s | 2 |
| 2022 | 11.8°C | 7.7°C | 3.6°C | 16.7°C | -1.7°C | 306 mm | 79% | 1.5 m/s | 1.7 |
| 2021 | 10.9°C | 7.1°C | 3.3°C | 24.0°C | -2.1°C | 232 mm | 82% | 1.6 m/s | 1.7 |
| 2020 | 15.7°C | 9.9°C | 4.2°C | 23.4°C | -0.7°C | 61 mm | 60% | 1.3 m/s | 2.3 |
| 2019 | 13.0°C | 9.1°C | 5.2°C | 17.5°C | -0.3°C | 177 mm | 81% | 1.6 m/s | 1.8 |
| 2018 | 13.7°C | 9.0°C | 4.2°C | 17.1°C | 0.2°C | 73 mm | 71% | 1.2 m/s | 2.1 |
| 2017 | 16.5°C | 10.8°C | 5.0°C | 21.3°C | -0.5°C | 8 mm | 54% | 1.1 m/s | 2.5 |
| 2016 | 12.2°C | 7.8°C | 3.3°C | 17.0°C | -2.7°C | 151 mm | 79% | 1.3 m/s | 2.1 |
| 2015 | 11.5°C | 7.2°C | 2.9°C | 18.3°C | -2.9°C | 132 mm | 75% | 1.5 m/s | 2 |
| 2014 | 13.2°C | 9.7°C | 6.3°C | 18.4°C | -3.1°C | 266 mm | 83% | 1.6 m/s | 1.7 |
| 2013 | 15.6°C | 9.4°C | 3.1°C | 21.8°C | -5.6°C | 12 mm | 49% | 1.1 m/s | 2.7 |
| 2012 | 10.9°C | 7.2°C | 3.5°C | 18.7°C | -3.5°C | 225 mm | 82% | 1.7 m/s | 1.8 |
| 2011 | 15.5°C | 9.2°C | 3.0°C | 20.9°C | 0.1°C | 3 mm | 48% | 1.1 m/s | 2.5 |
| 2010 | 12.4°C | 8.8°C | 5.2°C | 18.8°C | -5.0°C | 231 mm | 82% | 1.7 m/s | 1.6 |
| 2009 | 11.3°C | 6.8°C | 2.3°C | 17.2°C | -5.4°C | 94 mm | 72% | 1.3 m/s | 1.9 |
| 2008 | 11.6°C | 7.0°C | 2.4°C | 19.1°C | -4.5°C | 79 mm | 68% | 1.4 m/s | 1.9 |
| 2007 | 11.4°C | 6.6°C | 1.8°C | 17.4°C | -2.8°C | 110 mm | 70% | 1.5 m/s | 2.1 |
| 2006 | 13.4°C | 8.5°C | 3.6°C | 20.8°C | -3.8°C | 117 mm | 64% | 1.5 m/s | 2 |
| 2005 🌧️ | 13.6°C | 9.7°C | 5.9°C | 19.8°C | 0.5°C | 355 mm | 77% | 1.8 m/s | 1.7 |
| 2004 | 14.5°C | 9.6°C | 4.6°C | 20.4°C | -0.8°C | 175 mm | 71% | 1.7 m/s | 1.9 |
| 2003 | 11.9°C | 8.3°C | 4.7°C | 18.6°C | -1.8°C | 229 mm | 79% | 1.8 m/s | 1.7 |
| 2002 | 12.2°C | 8.6°C | 5.0°C | 19.0°C | -1.9°C | 302 mm | 79% | 2.2 m/s | 1.6 |
| 2001 | 11.1°C | 7.4°C | 3.7°C | 15.8°C | -2.6°C | 227 mm | 84% | 1.8 m/s | 1.7 |
| 2000 | 15.6°C | 10.4°C | 5.2°C | 20.5°C | 1.5°C | 26 mm | 58% | 1.2 m/s | 2 |
| 1999 | 16.1°C | 10.0°C | 3.8°C | 23.2°C | -0.6°C | 12 mm | 56% | 1.2 m/s | 2.4 |
| 1998 | 12.2°C | 7.2°C | 2.2°C | 23.0°C | -5.4°C | 42 mm | 67% | 1.2 m/s | 2.2 |
| 1997 | 13.6°C | 8.3°C | 3.0°C | 18.9°C | -1.6°C | 74 mm | 71% | 1.4 m/s | 2 |
| 1996 | 13.2°C | 9.6°C | 6.1°C | 19.6°C | 0.5°C | 309 mm | 78% | 2.3 m/s | 1.8 |
| 1995 | 14.0°C | 9.8°C | 5.7°C | 20.1°C | 0.1°C | 219 mm | 76% | 1.6 m/s | 1.6 |
| 1994 | 11.7°C | 7.4°C | 3.0°C | 18.6°C | -2.7°C | 131 mm | 78% | 1.3 m/s | 1.7 |
| 1993 | 13.9°C | 8.6°C | 3.3°C | 21.0°C | -0.8°C | 93 mm | 68% | 1.5 m/s | 1.9 |
| 1992 ❄️ | 10.9°C | 6.5°C | 2.0°C | 17.2°C | -3.9°C | 243 mm | 76% | 2.1 m/s | 1.8 |
| 1991 | 15.9°C | 10.3°C | 4.7°C | 20.6°C | 0.7°C | 83 mm | 57% | 1.5 m/s | 2.1 |
| 1990 | 13.1°C | 7.0°C | 1.0°C | 21.7°C | -7.9°C | 36 mm | 51% | 1.2 m/s | 2.4 |
| 1989 | 17.9°C | 11.4°C | 5.0°C | 22.3°C | 1.6°C | 1 mm | 52% | 1.1 m/s | 2.4 |
| 1988 | 13.1°C | 8.0°C | 2.9°C | 21.7°C | -5.6°C | 102 mm | 68% | 1.5 m/s | 2.1 |
| 1987 | 10.8°C | 6.6°C | 2.5°C | 17.3°C | -3.9°C | 161 mm | 76% | 2 m/s | 1.9 |
| 1986 | 15.8°C | 10.2°C | 4.5°C | 21.4°C | 2.0°C | 44 mm | 55% | 1.1 m/s | 1.9 |
| 1985 | 14.7°C | 9.2°C | 3.8°C | 20.7°C | -4.0°C | 74 mm | 71% | 1.4 m/s | 1.9 |
| 1984 | 12.3°C | 7.3°C | 2.3°C | 18.1°C | -1.7°C | 50 mm | 76% | 1.3 m/s | 1.9 |
| 1983 | 11.3°C | 8.0°C | 4.8°C | 16.2°C | -2.2°C | 293 mm | 88% | 1.8 m/s | — |
| 1982 | 12.3°C | 7.3°C | 2.4°C | 17.4°C | -3.2°C | 114 mm | 77% | 1.5 m/s | — |
| 1981 | 13.0°C | 9.3°C | 5.6°C | 18.7°C | 0.5°C | 194 mm | 81% | 1.6 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 13.4°C with lows near 4°C (mean 8.7°C), based on 45 years of NASA POWER data.
December averages 141 mm of rainfall in Roseville, a relatively wet time of year. The wettest on record was 355 mm in 2005.
The hottest December reached 24°C in 2021. The coldest dipped to -7.9°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.3°C. Daytime highs moved from 12.7°C to 13.7°C and overnight lows from 3.8°C to 5.3°C over the same span.
December is one of the cooler months of the year in Roseville and a relatively wet time of year, so plan for around 13.4°C daytime highs and 4°C at night.
Yes — December is the coldest month of the year in Roseville, averaging 8.7°C.
For December in Roseville, pack warm layers and a jacket for chilly mornings, with typical highs of 13.4°C and lows of 4°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 71% — moderately humid.
Average wind speed in December is 1.5 m/s. The windiest December on record averaged 2.3 m/s (1996).
The wettest December on record was 2005 with 355 mm. On average, December sees 141 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 Roseville 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.
