December is one of the cooler months of the year in Redding, with average highs near 10.3°C and lows around 1.4°C (mean 5.9°C). It is a relatively wet time of year, averaging 201 mm of rainfall and 82% relative humidity across the period.
December is one of the cooler months of the year in Redding. Across 45 years of records, the warmest December in Redding was 2025 — when the month averaged 9.3°C — while the coldest were 1992, 1994 and 2007 at 3.6°C. Typical December days reach 10.3°C with nights near 1.4°C. The long-term trend is warming, about 0.3°C per decade.
December is a relatively wet time of year in Redding, averaging 201 mm of rainfall. The wettest December on record was 2002 with 488 mm, while the driest was 1989 at 2 mm.
Relative humidity in Redding during December averages 82%. The most humid December was 2001 at 91%, and the least humid was 2013 at 57%.
December receives about 1.7 kWh/m²/day of solar energy in Redding. The sunniest Decembers were 2011 and 2013 at 2.4 kWh/m²/day, and the cloudiest was 2010 at 1.2.
Average wind speed in Redding during December is 0.8 m/s. The windiest Decembers were 1996 and 2002 at 1 m/s, while the calmest were 2021, 2022 and 2023, among others at 0.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 5.7°C | 5.3°C | 5.5°C | 6.2°C | 7.0°C | +1.3°C |
| Avg High | 10.2°C | 9.9°C | 9.8°C | 10.6°C | 11.5°C | +1.3°C |
| Avg Low | 1.3°C | 0.7°C | 1.3°C | 1.7°C | 2.4°C | +1.1°C |
| Avg Rain | 183 mm | 177 mm | 244 mm | 183 mm | 223 mm | +40 mm |
December temperatures in Redding have risen by about 1.4°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -9.7°C (1988) to a record high of 20.4°C (2021).
Rainfall in December is a relatively wet time of year, averaging 201 mm, with a wettest year of 488 mm.
A quieter season to visit Redding
If your dates are flexible, the more temperate months of June and September tend to be the most comfortable for visiting Redding. That said, December — with days averaging 10.3°C and nights around 1.4°C (mean 5.9°C) and higher rainfall (201 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 🔥 | 14.0°C | 9.3°C | 4.6°C | 18.9°C | -0.4°C | 314 mm | 85% | 0.8 m/s | — |
| 2024 | 11.7°C | 7.4°C | 3.1°C | 18.5°C | -1.7°C | 267 mm | 87% | 0.8 m/s | 1.6 |
| 2023 | 13.3°C | 8.6°C | 4.0°C | 17.4°C | -1.3°C | 180 mm | 82% | 0.7 m/s | 1.6 |
| 2022 | 9.0°C | 4.8°C | 0.5°C | 16.6°C | -4.4°C | 277 mm | 88% | 0.7 m/s | 1.6 |
| 2021 | 8.3°C | 4.5°C | 0.7°C | 20.4°C | -5.1°C | 216 mm | 87% | 0.7 m/s | 1.6 |
| 2020 | 13.0°C | 7.1°C | 1.3°C | 19.9°C | -1.7°C | 83 mm | 70% | 0.8 m/s | 2.1 |
| 2019 | 10.2°C | 6.5°C | 2.8°C | 15.3°C | -1.4°C | 206 mm | 89% | 0.7 m/s | 1.4 |
| 2018 | 10.8°C | 6.2°C | 1.5°C | 15.6°C | -3.2°C | 142 mm | 84% | 0.7 m/s | 1.8 |
| 2017 | 13.2°C | 7.6°C | 2.1°C | 18.2°C | -1.7°C | 8 mm | 72% | 0.7 m/s | 2.3 |
| 2016 | 8.8°C | 4.4°C | -0.1°C | 16.0°C | -4.4°C | 236 mm | 84% | 0.8 m/s | 1.9 |
| 2015 | 8.7°C | 4.9°C | 1.1°C | 14.9°C | -4.6°C | 256 mm | 87% | 0.7 m/s | 1.5 |
| 2014 | 11.0°C | 7.7°C | 4.5°C | 18.0°C | -3.0°C | 351 mm | 90% | 0.8 m/s | 1.3 |
| 2013 | 13.4°C | 6.9°C | 0.4°C | 20.3°C | -7.6°C | 5 mm | 57% | 0.8 m/s | 2.4 |
| 2012 | 7.5°C | 4.1°C | 0.6°C | 15.0°C | -4.0°C | 335 mm | 88% | 0.8 m/s | 1.6 |
| 2011 | 13.5°C | 7.2°C | 1.0°C | 16.9°C | -2.2°C | 12 mm | 59% | 0.8 m/s | 2.4 |
| 2010 | 9.2°C | 6.0°C | 2.8°C | 15.0°C | -5.7°C | 283 mm | 91% | 0.8 m/s | 1.2 |
| 2009 | 8.8°C | 4.5°C | 0.3°C | 18.0°C | -5.6°C | 127 mm | 78% | 0.7 m/s | 1.7 |
| 2008 | 9.3°C | 4.5°C | -0.3°C | 19.4°C | -8.0°C | 105 mm | 78% | 0.7 m/s | 1.9 |
| 2007 | 7.9°C | 3.6°C | -0.6°C | 12.1°C | -5.4°C | 153 mm | 83% | 0.8 m/s | 1.7 |
| 2006 | 10.1°C | 5.6°C | 1.0°C | 17.2°C | -3.9°C | 192 mm | 78% | 0.8 m/s | 1.7 |
| 2005 | 10.6°C | 6.6°C | 2.5°C | 16.6°C | -2.6°C | 463 mm | 87% | 0.8 m/s | 1.4 |
| 2004 | 11.4°C | 7.0°C | 2.5°C | 17.3°C | -2.2°C | 251 mm | 82% | 0.9 m/s | 1.8 |
| 2003 | 8.7°C | 5.4°C | 2.1°C | 15.1°C | -3.0°C | 326 mm | 89% | 0.8 m/s | 1.4 |
| 2002 🌧️ | 9.6°C | 6.0°C | 2.5°C | 17.0°C | -3.0°C | 488 mm | 87% | 1 m/s | 1.3 |
| 2001 | 8.5°C | 4.8°C | 1.1°C | 13.2°C | -3.8°C | 281 mm | 91% | 0.8 m/s | 1.4 |
| 2000 | 12.9°C | 7.4°C | 2.0°C | 18.1°C | -1.2°C | 51 mm | 72% | 0.7 m/s | 1.9 |
| 1999 | 12.0°C | 6.5°C | 1.0°C | 16.2°C | -3.3°C | 33 mm | 77% | 0.8 m/s | 2.1 |
| 1998 | 9.0°C | 4.6°C | 0.1°C | 16.8°C | -7.0°C | 66 mm | 80% | 0.7 m/s | 1.8 |
| 1997 | 9.3°C | 4.8°C | 0.4°C | 15.5°C | -3.1°C | 104 mm | 84% | 0.7 m/s | 1.8 |
| 1996 | 10.4°C | 6.8°C | 3.2°C | 16.4°C | -2.5°C | 471 mm | 88% | 1 m/s | 1.4 |
| 1995 | 11.4°C | 7.3°C | 3.1°C | 17.3°C | -2.8°C | 328 mm | 86% | 0.8 m/s | 1.4 |
| 1994 | 7.5°C | 3.6°C | -0.2°C | 13.0°C | -3.9°C | 151 mm | 89% | 0.7 m/s | 1.7 |
| 1993 | 10.2°C | 5.4°C | 0.6°C | 17.5°C | -3.6°C | 137 mm | 83% | 0.8 m/s | 1.7 |
| 1992 ❄️ | 7.7°C | 3.6°C | -0.4°C | 14.1°C | -4.0°C | 309 mm | 86% | 0.9 m/s | 1.6 |
| 1991 | 11.8°C | 6.6°C | 1.5°C | 17.4°C | -2.3°C | 143 mm | 73% | 0.8 m/s | 1.9 |
| 1990 | 9.6°C | 3.9°C | -1.9°C | 17.5°C | -9.1°C | 32 mm | 63% | 0.8 m/s | 2.1 |
| 1989 | 14.7°C | 8.6°C | 2.5°C | 19.7°C | -1.9°C | 2 mm | 66% | 0.8 m/s | 2.2 |
| 1988 | 9.5°C | 4.7°C | -0.1°C | 17.0°C | -9.7°C | 113 mm | 80% | 0.8 m/s | 1.9 |
| 1987 | 7.6°C | 4.1°C | 0.6°C | 12.5°C | -4.9°C | 275 mm | 88% | 0.9 m/s | 1.5 |
| 1986 | 12.4°C | 7.0°C | 1.5°C | 17.2°C | -0.8°C | 93 mm | 75% | 0.7 m/s | 1.6 |
| 1985 | 11.3°C | 6.4°C | 1.5°C | 15.4°C | -4.4°C | 109 mm | 78% | 0.8 m/s | 2 |
| 1984 | 8.5°C | 4.1°C | -0.3°C | 14.9°C | -4.6°C | 68 mm | 85% | 0.7 m/s | 1.8 |
| 1983 | 8.8°C | 5.5°C | 2.2°C | 15.6°C | -2.6°C | 408 mm | 90% | 0.8 m/s | — |
| 1982 | 8.8°C | 4.6°C | 0.3°C | 15.8°C | -4.7°C | 261 mm | 88% | 0.8 m/s | — |
| 1981 | 10.3°C | 6.7°C | 3.2°C | 15.2°C | 0.0°C | 317 mm | 90% | 0.8 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 10.3°C with lows near 1.4°C (mean 5.9°C), based on 45 years of NASA POWER data.
December averages 201 mm of rainfall in Redding, a relatively wet time of year. The wettest on record was 488 mm in 2002.
The hottest December reached 20.4°C in 2021. The coldest dipped to -9.7°C in 1988.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.4°C. Daytime highs moved from 9.5°C to 11.3°C and overnight lows from 1.4°C to 2.6°C over the same span.
December is one of the cooler months of the year in Redding and a relatively wet time of year, so plan for around 10.3°C daytime highs and 1.4°C at night.
Yes — December is the coldest month of the year in Redding, averaging 5.9°C.
For December in Redding, pack warm layers and a jacket for chilly mornings, with typical highs of 10.3°C and lows of 1.4°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 82% — quite humid.
Average wind speed in December is 0.8 m/s. The windiest December on record averaged 1 m/s (1996).
The wettest December on record was 2002 with 488 mm. On average, December sees 201 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 Redding 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.
