December is one of the cooler months of the year in Stockton, with average highs near 14.5°C and lows around 4.7°C (mean 9.6°C). It is a relatively wet time of year, averaging 89 mm of rainfall and 74% relative humidity across the period.
December is one of the cooler months of the year in Stockton. Across 45 years of records, the warmest December in Stockton was 2023 — when the month averaged 12.1°C — while the coldest were 1998 and 2008 at 7.5°C. Typical December days reach 14.5°C with nights near 4.7°C. The long-term December temperature trend is broadly flat.
December is a relatively wet time of year in Stockton, averaging 89 mm of rainfall. The wettest December on record was 2022 with 260 mm, while the driest was 1989 at 1 mm.
Relative humidity in Stockton during December averages 74%. The most humid December was 1983 at 87%, and the least humid was 2013 at 56%.
December receives about 2.2 kWh/m²/day of solar energy in Stockton. The sunniest December was 2013 at 2.8 kWh/m²/day, and the cloudiest were 2002, 2003 and 2010, among others at 1.8.
Average wind speed in Stockton during December is 1.8 m/s. The windiest December was 1987 at 2.9 m/s, while the calmest was 1989 at 1.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.5°C | 9.4°C | 9.4°C | 9.6°C | 10.1°C | +0.6°C |
| Avg High | 14.6°C | 14.7°C | 14.0°C | 14.5°C | 14.6°C | 0°C |
| Avg Low | 4.5°C | 4.1°C | 4.7°C | 4.8°C | 5.7°C | +1.2°C |
| Avg Rain | 67 mm | 75 mm | 106 mm | 87 mm | 119 mm | +52 mm |
December temperatures in Stockton have risen by about 0.8°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -5.9°C (1990) to a record high of 24°C (1998).
Rainfall in December is a relatively wet time of year, averaging 89 mm, with a wettest year of 260 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.3°C per decade, narrowing the gap between day and night.
A quieter season to visit Stockton
If your dates are flexible, the more temperate months of June and September tend to be the most comfortable for visiting Stockton. That said, December — with days averaging 14.5°C and nights around 4.7°C (mean 9.6°C) and higher rainfall (89 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 | 12.9°C | 9.6°C | 6.3°C | 19.5°C | 2.5°C | 79 mm | 85% | 1.6 m/s | — |
| 2024 | 16.1°C | 11.5°C | 6.9°C | 21.9°C | 2.8°C | 91 mm | 79% | 1.6 m/s | 2.1 |
| 2023 🔥 | 17.1°C | 12.1°C | 7.2°C | 21.2°C | 2.5°C | 72 mm | 77% | 1.4 m/s | 2.2 |
| 2022 🌧️ | 12.9°C | 8.7°C | 4.5°C | 15.8°C | 0.3°C | 260 mm | 83% | 1.7 m/s | 1.9 |
| 2021 | 12.3°C | 8.4°C | 4.5°C | 23.8°C | 1.0°C | 169 mm | 85% | 2 m/s | 1.9 |
| 2020 | 16.1°C | 10.4°C | 4.7°C | 23.6°C | 1.0°C | 42 mm | 67% | 1.5 m/s | 2.5 |
| 2019 | 14.6°C | 10.4°C | 6.2°C | 19.6°C | 1.6°C | 119 mm | 82% | 2 m/s | 1.9 |
| 2018 | 14.9°C | 10.0°C | 5.1°C | 18.4°C | 1.3°C | 62 mm | 77% | 1.6 m/s | 2.3 |
| 2017 | 15.9°C | 10.2°C | 4.5°C | 20.4°C | 0.7°C | 4 mm | 59% | 1.3 m/s | 2.7 |
| 2016 | 13.1°C | 8.5°C | 3.9°C | 19.0°C | -2.4°C | 86 mm | 82% | 1.8 m/s | 2.3 |
| 2015 | 13.6°C | 8.7°C | 3.7°C | 19.5°C | -3.0°C | 87 mm | 76% | 1.7 m/s | 2.2 |
| 2014 | 15.3°C | 11.3°C | 7.3°C | 21.4°C | -1.4°C | 197 mm | 84% | 2.2 m/s | 1.9 |
| 2013 | 15.0°C | 8.9°C | 2.8°C | 20.7°C | -4.2°C | 12 mm | 56% | 1.3 m/s | 2.8 |
| 2012 | 12.9°C | 8.7°C | 4.5°C | 18.3°C | -1.6°C | 148 mm | 83% | 2.1 m/s | 2 |
| 2011 | 15.1°C | 9.2°C | 3.3°C | 20.7°C | 0.0°C | 3 mm | 58% | 1.4 m/s | 2.6 |
| 2010 | 14.2°C | 10.2°C | 6.3°C | 19.6°C | -1.0°C | 151 mm | 83% | 1.9 m/s | 1.8 |
| 2009 | 12.7°C | 8.1°C | 3.5°C | 19.2°C | -3.9°C | 70 mm | 76% | 1.6 m/s | 2.1 |
| 2008 | 12.4°C | 7.5°C | 2.7°C | 17.9°C | -2.3°C | 51 mm | 76% | 1.7 m/s | 2.2 |
| 2007 | 12.6°C | 7.6°C | 2.6°C | 20.0°C | -2.2°C | 71 mm | 71% | 2.1 m/s | 2.4 |
| 2006 | 14.5°C | 9.1°C | 3.8°C | 20.9°C | -3.2°C | 73 mm | 66% | 1.8 m/s | 2.3 |
| 2005 | 15.1°C | 11.1°C | 7.0°C | 21.5°C | 0.4°C | 194 mm | 76% | 2 m/s | 1.9 |
| 2004 | 15.4°C | 10.4°C | 5.3°C | 19.1°C | 0.1°C | 113 mm | 72% | 2.1 m/s | 2.2 |
| 2003 | 14.2°C | 10.1°C | 5.9°C | 19.2°C | 0.6°C | 129 mm | 76% | 2.2 m/s | 1.8 |
| 2002 | 14.4°C | 10.2°C | 6.1°C | 19.2°C | 0.3°C | 188 mm | 79% | 2.5 m/s | 1.8 |
| 2001 | 13.2°C | 9.2°C | 5.2°C | 19.4°C | -1.2°C | 158 mm | 81% | 2.4 m/s | 1.8 |
| 2000 | 15.9°C | 10.4°C | 5.0°C | 19.0°C | 0.9°C | 13 mm | 66% | 1.2 m/s | 2.2 |
| 1999 | 16.8°C | 10.6°C | 4.4°C | 23.1°C | 0.6°C | 7 mm | 62% | 1.6 m/s | 2.7 |
| 1998 ❄️ | 13.0°C | 7.5°C | 2.1°C | 24.0°C | -5.0°C | 22 mm | 73% | 1.6 m/s | 2.5 |
| 1997 | 14.3°C | 9.0°C | 3.7°C | 18.5°C | -1.0°C | 57 mm | 71% | 2 m/s | 2.3 |
| 1996 | 15.3°C | 11.0°C | 6.7°C | 19.0°C | 1.0°C | 183 mm | 81% | 2.5 m/s | 2 |
| 1995 | 15.9°C | 11.3°C | 6.7°C | 22.2°C | 0.1°C | 147 mm | 77% | 2 m/s | 2 |
| 1994 | 13.3°C | 8.4°C | 3.5°C | 19.9°C | -2.7°C | 60 mm | 77% | 1.6 m/s | 2.1 |
| 1993 | 15.3°C | 9.7°C | 4.1°C | 20.0°C | -1.4°C | 49 mm | 68% | 1.6 m/s | 2.2 |
| 1992 | 13.5°C | 8.4°C | 3.2°C | 17.9°C | -2.1°C | 145 mm | 74% | 2.4 m/s | 2.3 |
| 1991 | 16.3°C | 10.5°C | 4.7°C | 19.2°C | 0.0°C | 45 mm | 62% | 1.9 m/s | 2.4 |
| 1990 | 13.7°C | 7.7°C | 1.6°C | 22.0°C | -5.9°C | 31 mm | 57% | 1.5 m/s | 2.6 |
| 1989 | 17.2°C | 11.0°C | 4.7°C | 21.8°C | 1.9°C | 1 mm | 60% | 1.1 m/s | 2.7 |
| 1988 | 14.7°C | 9.3°C | 4.0°C | 23.6°C | -3.2°C | 75 mm | 68% | 2 m/s | 2.3 |
| 1987 | 13.3°C | 8.5°C | 3.6°C | 20.4°C | -2.4°C | 87 mm | 72% | 2.9 m/s | 2.2 |
| 1986 | 16.4°C | 10.7°C | 4.9°C | 22.0°C | 2.3°C | 26 mm | 60% | 1.2 m/s | 2.2 |
| 1985 | 14.9°C | 9.5°C | 4.2°C | 20.1°C | -1.9°C | 58 mm | 71% | 1.3 m/s | 2.2 |
| 1984 | 13.2°C | 8.3°C | 3.3°C | 19.2°C | -0.8°C | 41 mm | 78% | 1.9 m/s | 2.2 |
| 1983 | 13.6°C | 9.8°C | 6.1°C | 19.3°C | 0.0°C | 146 mm | 87% | 2.2 m/s | — |
| 1982 | 13.3°C | 8.3°C | 3.4°C | 17.6°C | -2.3°C | 78 mm | 80% | 2 m/s | — |
| 1981 | 14.7°C | 10.4°C | 6.0°C | 19.8°C | 1.5°C | 94 mm | 82% | 1.9 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 14.5°C with lows near 4.7°C (mean 9.6°C), based on 45 years of NASA POWER data.
December averages 89 mm of rainfall in Stockton, a relatively wet time of year. The wettest on record was 260 mm in 2022.
The hottest December reached 24°C in 1998. The coldest dipped to -5.9°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 0.8°C. Daytime highs moved from 13.9°C to 14.3°C and overnight lows from 4.6°C to 5.9°C over the same span.
December is one of the cooler months of the year in Stockton and a relatively wet time of year, so plan for around 14.5°C daytime highs and 4.7°C at night.
Yes — December is the coldest month of the year in Stockton, averaging 9.6°C.
For December in Stockton, pack warm layers and a jacket for chilly mornings, with typical highs of 14.5°C and lows of 4.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 74% — moderately humid.
Average wind speed in December is 1.8 m/s. The windiest December on record averaged 2.9 m/s (1987).
The wettest December on record was 2022 with 260 mm. On average, December sees 89 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 Stockton 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.
