December is one of the cooler months of the year in Apple Valley, with average highs near 12.9°C and lows around 1.2°C (mean 7.1°C). It is a relatively wet time of year, averaging 29 mm of rainfall and 54% relative humidity across the period.
December is one of the cooler months of the year in Apple Valley. Across 45 years of records, the warmest December in Apple Valley was 2025 — when the month averaged 12.1°C — while the coldest was 1990 at 3.3°C. Typical December days reach 12.9°C with nights near 1.2°C. The long-term trend is warming, about 0.7°C per decade.
December is a relatively wet time of year in Apple Valley, averaging 29 mm of rainfall. The wettest December on record was 2010 with 137 mm, while the driest were 2017 and 2024 at 0 mm.
Relative humidity in Apple Valley during December averages 54%. The most humid December was 1984 at 71%, and the least humid was 2017 at 24%.
December receives about 2.9 kWh/m²/day of solar energy in Apple Valley. The sunniest December was 2017 at 3.3 kWh/m²/day, and the cloudiest were 1984 and 2019 at 2.5.
Average wind speed in Apple Valley during December is 2.3 m/s. The windiest Decembers were 1983 and 1996 at 2.9 m/s, while the calmest was 1986 at 1.6 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 6.3°C | 6.1°C | 6.7°C | 7.5°C | 9.6°C | +3.3°C |
| Avg High | 12.1°C | 12.0°C | 12.6°C | 13.1°C | 15.4°C | +3.3°C |
| Avg Low | 0.4°C | 0.1°C | 0.9°C | 1.8°C | 3.6°C | +3.2°C |
| Avg Rain | 34 mm | 25 mm | 21 mm | 37 mm | 29 mm | -5 mm |
December temperatures in Apple Valley have risen by about 3.3°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -11.8°C (1990) to a record high of 24.5°C (2025).
Rainfall in December is a relatively wet time of year, averaging 29 mm, with a wettest year of 137 mm.
A quieter season to visit Apple Valley
If your dates are flexible, the more temperate months of June and September tend to be the most comfortable for visiting Apple Valley. That said, December — with days averaging 12.9°C and nights around 1.2°C (mean 7.1°C) and low rainfall (29 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 🔥 | 17.9°C | 12.1°C | 6.2°C | 24.5°C | -0.3°C | 54 mm | 51% | 2 m/s | — |
| 2024 | 18.4°C | 11.8°C | 5.1°C | 23.2°C | -0.3°C | 0 mm | 37% | 2 m/s | 3 |
| 2023 | 16.0°C | 10.1°C | 4.2°C | 22.2°C | -0.8°C | 19 mm | 51% | 1.7 m/s | 2.8 |
| 2022 | 12.8°C | 7.5°C | 2.1°C | 21.3°C | -3.0°C | 24 mm | 64% | 2.2 m/s | 2.7 |
| 2021 | 13.3°C | 7.9°C | 2.5°C | 24.2°C | -3.2°C | 67 mm | 59% | 2.5 m/s | 2.8 |
| 2020 | 14.2°C | 7.9°C | 1.6°C | 20.2°C | -2.6°C | 11 mm | 38% | 2.3 m/s | 3 |
| 2019 | 11.4°C | 6.7°C | 2.0°C | 21.7°C | -5.1°C | 62 mm | 64% | 2.1 m/s | 2.5 |
| 2018 | 13.4°C | 7.8°C | 2.3°C | 19.9°C | -4.0°C | 21 mm | 54% | 2 m/s | 3 |
| 2017 | 16.9°C | 10.1°C | 3.2°C | 23.4°C | -3.5°C | 0 mm | 24% | 2.2 m/s | 3.3 |
| 2016 | 12.4°C | 6.9°C | 1.3°C | 20.8°C | -4.4°C | 73 mm | 60% | 2.5 m/s | 2.9 |
| 2015 | 12.3°C | 6.4°C | 0.4°C | 23.8°C | -4.6°C | 11 mm | 50% | 2.7 m/s | 3.1 |
| 2014 | 13.4°C | 8.4°C | 3.3°C | 20.8°C | -3.9°C | 36 mm | 64% | 1.9 m/s | 2.7 |
| 2013 | 12.9°C | 6.6°C | 0.2°C | 21.5°C | -5.4°C | 4 mm | 46% | 2.2 m/s | 3.2 |
| 2012 | 12.5°C | 7.1°C | 1.7°C | 22.0°C | -4.6°C | 18 mm | 61% | 2.4 m/s | 2.9 |
| 2011 | 11.9°C | 6.0°C | 0.2°C | 22.3°C | -3.5°C | 6 mm | 43% | 2.2 m/s | 3.2 |
| 2010 🌧️ | 13.9°C | 8.5°C | 3.2°C | 22.1°C | -4.7°C | 137 mm | 66% | 2.4 m/s | 2.6 |
| 2009 | 10.9°C | 5.4°C | 0.0°C | 17.8°C | -5.7°C | 36 mm | 58% | 2.4 m/s | 2.9 |
| 2008 | 11.2°C | 5.6°C | -0.1°C | 24.1°C | -6.6°C | 44 mm | 62% | 2.4 m/s | 2.8 |
| 2007 | 10.5°C | 5.0°C | -0.5°C | 22.0°C | -4.3°C | 15 mm | 59% | 2.6 m/s | 3.1 |
| 2006 | 13.3°C | 7.0°C | 0.7°C | 22.0°C | -4.1°C | 5 mm | 42% | 2.5 m/s | 3.2 |
| 2005 | 14.4°C | 8.2°C | 2.0°C | 21.8°C | -3.5°C | 2 mm | 53% | 2.2 m/s | 2.8 |
| 2004 | 12.8°C | 7.1°C | 1.5°C | 21.8°C | -3.9°C | 52 mm | 60% | 2.4 m/s | 3 |
| 2003 | 12.9°C | 7.0°C | 1.0°C | 20.4°C | -4.8°C | 20 mm | 57% | 2.3 m/s | 2.8 |
| 2002 | 12.1°C | 6.7°C | 1.3°C | 17.5°C | -3.4°C | 30 mm | 63% | 2.1 m/s | 3 |
| 2001 | 11.9°C | 6.1°C | 0.3°C | 18.6°C | -3.8°C | 11 mm | 57% | 2.2 m/s | 2.9 |
| 2000 | 15.7°C | 9.2°C | 2.7°C | 21.1°C | -2.2°C | 0 mm | 41% | 1.9 m/s | 3 |
| 1999 | 13.5°C | 6.9°C | 0.3°C | 19.7°C | -2.8°C | 7 mm | 39% | 2.5 m/s | 3.2 |
| 1998 | 12.6°C | 6.5°C | 0.3°C | 21.0°C | -6.2°C | 8 mm | 44% | 2.8 m/s | 3.2 |
| 1997 | 10.4°C | 5.0°C | -0.5°C | 19.9°C | -4.7°C | 33 mm | 53% | 2.6 m/s | 3.1 |
| 1996 | 13.5°C | 7.6°C | 1.8°C | 20.4°C | -4.2°C | 26 mm | 61% | 2.9 m/s | 2.7 |
| 1995 | 15.1°C | 8.8°C | 2.5°C | 22.5°C | -3.0°C | 12 mm | 53% | 2.1 m/s | 2.8 |
| 1994 | 12.1°C | 6.3°C | 0.5°C | 19.0°C | -4.9°C | 40 mm | 61% | 1.9 m/s | 2.8 |
| 1993 | 12.5°C | 6.0°C | -0.6°C | 19.5°C | -4.4°C | 14 mm | 51% | 2.1 m/s | 3.1 |
| 1992 | 9.3°C | 4.1°C | -1.1°C | 16.4°C | -5.3°C | 71 mm | 65% | 2.6 m/s | 2.9 |
| 1991 | 12.0°C | 6.4°C | 0.8°C | 18.2°C | -4.3°C | 36 mm | 55% | 2.2 m/s | 3 |
| 1990 ❄️ | 9.4°C | 3.3°C | -2.8°C | 18.8°C | -11.8°C | 7 mm | 44% | 2.5 m/s | 2.9 |
| 1989 | 14.2°C | 7.4°C | 0.7°C | 23.6°C | -4.0°C | 5 mm | 35% | 2 m/s | 3.1 |
| 1988 | 11.1°C | 5.1°C | -0.9°C | 20.2°C | -6.0°C | 33 mm | 55% | 2.7 m/s | 2.6 |
| 1987 | 9.0°C | 4.1°C | -0.8°C | 22.3°C | -8.3°C | 34 mm | 63% | 2.5 m/s | 2.6 |
| 1986 | 12.8°C | 6.8°C | 0.7°C | 20.6°C | -4.7°C | 28 mm | 53% | 1.6 m/s | 2.7 |
| 1985 | 12.4°C | 6.4°C | 0.5°C | 18.0°C | -6.2°C | 12 mm | 58% | 1.9 m/s | 3 |
| 1984 | 9.9°C | 4.6°C | -0.8°C | 14.1°C | -4.9°C | 94 mm | 71% | 2.3 m/s | 2.5 |
| 1983 | 12.9°C | 7.2°C | 1.5°C | 19.5°C | -4.5°C | 49 mm | 67% | 2.9 m/s | — |
| 1982 | 11.2°C | 5.6°C | 0.0°C | 17.9°C | -5.0°C | 46 mm | 60% | 2.7 m/s | — |
| 1981 | 15.6°C | 9.1°C | 2.7°C | 21.8°C | -3.9°C | 4 mm | 53% | 2.2 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 12.9°C with lows near 1.2°C (mean 7.1°C), based on 45 years of NASA POWER data.
December averages 29 mm of rainfall in Apple Valley, a relatively wet time of year. The wettest on record was 137 mm in 2010.
The hottest December reached 24.5°C in 2025. The coldest dipped to -11.8°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 3.3°C. Daytime highs moved from 12.4°C to 15.7°C and overnight lows from 0.8°C to 4°C over the same span.
December is one of the cooler months of the year in Apple Valley and a relatively wet time of year, so plan for around 12.9°C daytime highs and 1.2°C at night.
Yes — December is the coldest month of the year in Apple Valley, averaging 7.1°C.
For December in Apple Valley, pack warm layers and a jacket for chilly mornings, with typical highs of 12.9°C and lows of 1.2°C.
Relative humidity in December averages 54% — relatively dry.
Average wind speed in December is 2.3 m/s. The windiest December on record averaged 2.9 m/s (1983).
The wettest December on record was 2010 with 137 mm. On average, December sees 29 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 Apple Valley 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.
