December is one of the cooler months of the year in Elk Grove, with average highs near 14.2°C and lows around 5°C (mean 9.6°C). It is a relatively wet time of year, averaging 112 mm of rainfall and 70% relative humidity across the period.
December is one of the cooler months of the year in Elk Grove. Across 45 years of records, the warmest December in Elk Grove was 2023 — when the month averaged 12.3°C — while the coldest was 2008 at 7.5°C. Typical December days reach 14.2°C with nights near 5°C. The long-term December temperature trend is broadly flat.
December is a relatively wet time of year in Elk Grove, averaging 112 mm of rainfall. The wettest December on record was 2022 with 314 mm, while the driest was 1989 at 1 mm.
Relative humidity in Elk Grove during December averages 70%. The most humid December was 1983 at 86%, and the least humid was 2013 at 51%.
December receives about 2 kWh/m²/day of solar energy in Elk Grove. 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 Elk Grove during December is 1.9 m/s. The windiest Decembers were 1987 and 1996 at 3 m/s, while the calmest were 2000, 2013 and 2017, among others at 1.3 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.7°C | 9.5°C | 9.4°C | 9.6°C | 10.1°C | +0.4°C |
| Avg High | 14.4°C | 14.5°C | 13.7°C | 14.3°C | 14.4°C | 0°C |
| Avg Low | 4.9°C | 4.5°C | 5.0°C | 5.0°C | 5.9°C | +1°C |
| Avg Rain | 91 mm | 97 mm | 128 mm | 106 mm | 151 mm | +60 mm |
December temperatures in Elk Grove have risen by about 0.8°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -5.5°C (1990) to a record high of 25.2°C (1998).
Rainfall in December is a relatively wet time of year, averaging 112 mm, with a wettest year of 314 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0°C per decade while lows rose 0.2°C per decade, narrowing the gap between day and night.
A quieter season to visit Elk Grove
If your dates are flexible, the more temperate months of June and September tend to be the most comfortable for visiting Elk Grove. That said, December — with days averaging 14.2°C and nights around 5°C (mean 9.6°C) and higher rainfall (112 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 | 13.4°C | 10.2°C | 7.0°C | 18.4°C | 3.5°C | 123 mm | 84% | 1.8 m/s | — |
| 2024 | 15.6°C | 11.4°C | 7.2°C | 20.6°C | 3.2°C | 125 mm | 75% | 1.7 m/s | 1.9 |
| 2023 🔥 | 16.9°C | 12.3°C | 7.6°C | 21.9°C | 3.7°C | 82 mm | 71% | 1.5 m/s | 2 |
| 2022 🌧️ | 12.7°C | 8.6°C | 4.6°C | 16.0°C | 0.6°C | 314 mm | 79% | 1.9 m/s | 1.7 |
| 2021 | 11.7°C | 8.0°C | 4.2°C | 23.2°C | 0.6°C | 210 mm | 83% | 2.1 m/s | 1.7 |
| 2020 | 16.0°C | 10.4°C | 4.8°C | 24.5°C | 0.5°C | 51 mm | 62% | 1.6 m/s | 2.3 |
| 2019 | 14.2°C | 10.2°C | 6.2°C | 19.4°C | 1.4°C | 148 mm | 79% | 2.1 m/s | 1.8 |
| 2018 | 14.6°C | 9.8°C | 5.0°C | 18.4°C | 1.3°C | 71 mm | 72% | 1.5 m/s | 2.1 |
| 2017 | 16.2°C | 10.8°C | 5.4°C | 21.5°C | 0.5°C | 8 mm | 57% | 1.3 m/s | 2.5 |
| 2016 | 12.9°C | 8.5°C | 4.1°C | 17.4°C | -1.8°C | 119 mm | 80% | 1.7 m/s | 2.1 |
| 2015 | 12.9°C | 8.3°C | 3.7°C | 19.2°C | -2.4°C | 113 mm | 75% | 1.8 m/s | 2 |
| 2014 | 14.8°C | 11.1°C | 7.4°C | 20.2°C | -0.9°C | 217 mm | 81% | 2.3 m/s | 1.7 |
| 2013 | 15.5°C | 9.6°C | 3.7°C | 20.8°C | -4.5°C | 13 mm | 51% | 1.3 m/s | 2.7 |
| 2012 | 12.3°C | 8.4°C | 4.4°C | 18.3°C | -2.4°C | 179 mm | 81% | 2.4 m/s | 1.8 |
| 2011 | 15.5°C | 9.5°C | 3.6°C | 21.7°C | 0.4°C | 3 mm | 52% | 1.4 m/s | 2.5 |
| 2010 | 13.6°C | 10.0°C | 6.5°C | 19.5°C | -2.0°C | 187 mm | 81% | 2.2 m/s | 1.6 |
| 2009 | 12.4°C | 8.0°C | 3.6°C | 18.1°C | -4.6°C | 85 mm | 72% | 1.8 m/s | 1.9 |
| 2008 ❄️ | 12.2°C | 7.5°C | 2.9°C | 18.0°C | -2.8°C | 65 mm | 71% | 1.8 m/s | 1.9 |
| 2007 | 12.4°C | 7.6°C | 2.7°C | 19.1°C | -2.0°C | 95 mm | 69% | 2.1 m/s | 2.1 |
| 2006 | 14.2°C | 9.4°C | 4.5°C | 20.1°C | -2.7°C | 94 mm | 63% | 2 m/s | 2 |
| 2005 | 14.7°C | 11.0°C | 7.2°C | 20.9°C | 1.0°C | 250 mm | 74% | 2.4 m/s | 1.7 |
| 2004 | 15.3°C | 10.6°C | 5.9°C | 19.4°C | 0.2°C | 123 mm | 68% | 2.3 m/s | 1.9 |
| 2003 | 13.7°C | 9.8°C | 5.8°C | 19.1°C | -0.9°C | 158 mm | 74% | 2.5 m/s | 1.7 |
| 2002 | 13.8°C | 10.1°C | 6.3°C | 19.7°C | -0.4°C | 208 mm | 76% | 2.9 m/s | 1.6 |
| 2001 | 12.6°C | 8.8°C | 5.0°C | 18.0°C | -1.7°C | 182 mm | 79% | 2.5 m/s | 1.7 |
| 2000 | 16.0°C | 11.0°C | 6.1°C | 20.1°C | 3.6°C | 19 mm | 59% | 1.3 m/s | 2 |
| 1999 | 16.7°C | 10.7°C | 4.7°C | 24.4°C | 0.2°C | 8 mm | 56% | 1.6 m/s | 2.4 |
| 1998 | 13.1°C | 7.7°C | 2.4°C | 25.2°C | -4.8°C | 30 mm | 69% | 1.5 m/s | 2.2 |
| 1997 | 14.6°C | 9.4°C | 4.2°C | 19.5°C | -0.4°C | 67 mm | 68% | 2 m/s | 2 |
| 1996 | 14.7°C | 10.8°C | 6.9°C | 19.8°C | 1.4°C | 242 mm | 78% | 3 m/s | 1.8 |
| 1995 | 15.2°C | 11.0°C | 6.8°C | 20.9°C | 0.8°C | 173 mm | 75% | 2 m/s | 1.6 |
| 1994 | 12.7°C | 8.4°C | 4.1°C | 18.7°C | -1.7°C | 99 mm | 75% | 1.7 m/s | 1.7 |
| 1993 | 15.1°C | 9.9°C | 4.7°C | 20.8°C | 0.9°C | 68 mm | 64% | 1.8 m/s | 1.9 |
| 1992 | 12.7°C | 7.9°C | 3.0°C | 19.1°C | -3.2°C | 191 mm | 74% | 2.8 m/s | 1.8 |
| 1991 | 16.4°C | 11.0°C | 5.7°C | 20.0°C | 1.8°C | 59 mm | 57% | 2 m/s | 2.1 |
| 1990 | 13.7°C | 7.9°C | 2.1°C | 21.9°C | -5.5°C | 36 mm | 53% | 1.4 m/s | 2.4 |
| 1989 | 17.7°C | 11.8°C | 5.9°C | 22.0°C | 2.6°C | 1 mm | 54% | 1.3 m/s | 2.4 |
| 1988 | 14.3°C | 9.3°C | 4.3°C | 22.8°C | -3.5°C | 91 mm | 65% | 2.1 m/s | 2.1 |
| 1987 | 12.7°C | 8.2°C | 3.7°C | 19.8°C | -2.3°C | 110 mm | 70% | 3 m/s | 1.9 |
| 1986 | 16.3°C | 10.9°C | 5.4°C | 21.2°C | 2.5°C | 33 mm | 56% | 1.3 m/s | 1.9 |
| 1985 | 15.3°C | 10.3°C | 5.3°C | 20.2°C | -2.5°C | 75 mm | 67% | 1.6 m/s | 1.9 |
| 1984 | 13.2°C | 8.4°C | 3.5°C | 18.6°C | -0.1°C | 46 mm | 74% | 1.8 m/s | 1.9 |
| 1983 | 12.8°C | 9.4°C | 6.0°C | 18.1°C | -1.0°C | 209 mm | 86% | 2.4 m/s | — |
| 1982 | 13.1°C | 8.4°C | 3.6°C | 17.5°C | -1.5°C | 108 mm | 77% | 2 m/s | — |
| 1981 | 14.1°C | 10.2°C | 6.3°C | 19.3°C | 1.3°C | 145 mm | 81% | 2 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 14.2°C with lows near 5°C (mean 9.6°C), based on 45 years of NASA POWER data.
December averages 112 mm of rainfall in Elk Grove, a relatively wet time of year. The wettest on record was 314 mm in 2022.
The hottest December reached 25.2°C in 1998. The coldest dipped to -5.5°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 13.7°C to 14.1°C and overnight lows from 4.9°C to 6.1°C over the same span.
December is one of the cooler months of the year in Elk Grove and a relatively wet time of year, so plan for around 14.2°C daytime highs and 5°C at night.
Yes — December is the coldest month of the year in Elk Grove, averaging 9.6°C.
For December in Elk Grove, pack warm layers and a jacket for chilly mornings, with typical highs of 14.2°C and lows of 5°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 70% — moderately humid.
Average wind speed in December is 1.9 m/s. The windiest December on record averaged 3 m/s (1987).
The wettest December on record was 2022 with 314 mm. On average, December sees 112 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 Elk Grove 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.
