December is one of the cooler months of the year in Prescott Valley, with average highs near 11.8°C and lows around -0.9°C (mean 5.5°C). It is about average for rainfall, averaging 36 mm of rainfall and 55% relative humidity across the period.
December is one of the cooler months of the year in Prescott Valley. Across 45 years of records, the warmest Decembers in Prescott Valley were 2024 and 2025 — when the month averaged 9.9°C — while the coldest was 1990 at 2.7°C. Typical December days reach 11.8°C with nights near -0.9°C. The long-term trend is warming, about 0.5°C per decade.
December is about average for rainfall in Prescott Valley, averaging 36 mm of rainfall. The wettest December on record was 1984 with 119 mm, while the driest were 2005 and 2024 at 0 mm.
Relative humidity in Prescott Valley during December averages 55%. The most humid December was 1984 at 76%, and the least humid was 2017 at 27%.
December receives about 2.9 kWh/m²/day of solar energy in Prescott Valley. The sunniest Decembers were 1999 and 2017 at 3.3 kWh/m²/day, and the cloudiest was 1984 at 2.4.
Average wind speed in Prescott Valley during December is 1.8 m/s. The windiest Decembers were 1990, 1998 and 1999, among others at 2.1 m/s, while the calmest was 2022 at 1.5 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 5.0°C | 4.8°C | 5.0°C | 5.7°C | 7.6°C | +2.6°C |
| Avg High | 11.4°C | 11.2°C | 11.4°C | 11.8°C | 14.3°C | +2.9°C |
| Avg Low | -1.3°C | -1.7°C | -1.5°C | -0.5°C | 1.0°C | +2.3°C |
| Avg Rain | 41 mm | 33 mm | 32 mm | 44 mm | 27 mm | -14 mm |
December temperatures in Prescott Valley have risen by about 2.6°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -15.2°C (1990) to a record high of 23°C (1989).
Rainfall in December is about average for rainfall, averaging 36 mm, with a wettest year of 119 mm.
A quieter season to visit Prescott Valley
If your dates are flexible, the more temperate months of September and June tend to be the most comfortable for visiting Prescott Valley. That said, December — with days averaging 11.8°C and nights around -0.9°C (mean 5.5°C) and moderate rainfall (36 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 | 16.8°C | 9.9°C | 3.0°C | 22.9°C | -2.7°C | 15 mm | 54% | 1.8 m/s | — |
| 2024 🔥 | 17.7°C | 9.9°C | 2.1°C | 21.5°C | -3.4°C | 0 mm | 33% | 1.6 m/s | 3.2 |
| 2023 | 15.0°C | 8.0°C | 1.0°C | 21.8°C | -3.6°C | 20 mm | 46% | 1.6 m/s | 3 |
| 2022 | 11.2°C | 5.5°C | -0.1°C | 19.7°C | -6.2°C | 46 mm | 65% | 1.5 m/s | 2.6 |
| 2021 | 12.4°C | 6.6°C | 0.9°C | 22.1°C | -4.5°C | 73 mm | 59% | 1.9 m/s | 2.7 |
| 2020 | 12.8°C | 5.8°C | -1.2°C | 19.6°C | -5.7°C | 7 mm | 39% | 1.9 m/s | 3.1 |
| 2019 | 10.1°C | 4.8°C | -0.5°C | 16.7°C | -7.7°C | 71 mm | 66% | 1.9 m/s | 2.7 |
| 2018 | 11.9°C | 5.6°C | -0.7°C | 19.3°C | -5.5°C | 11 mm | 53% | 1.6 m/s | 2.9 |
| 2017 | 16.2°C | 8.6°C | 1.1°C | 22.7°C | -5.1°C | 0 mm | 27% | 1.9 m/s | 3.3 |
| 2016 | 12.3°C | 6.5°C | 0.8°C | 18.8°C | -6.3°C | 96 mm | 64% | 1.9 m/s | 2.8 |
| 2015 | 10.4°C | 4.2°C | -2.0°C | 20.4°C | -7.3°C | 16 mm | 54% | 1.8 m/s | 3 |
| 2014 | 11.9°C | 6.1°C | 0.3°C | 18.7°C | -5.4°C | 58 mm | 64% | 1.6 m/s | 2.7 |
| 2013 | 11.6°C | 4.9°C | -1.8°C | 19.7°C | -8.2°C | 16 mm | 53% | 2 m/s | 3.2 |
| 2012 | 10.7°C | 4.9°C | -1.0°C | 21.5°C | -6.2°C | 42 mm | 58% | 1.7 m/s | 2.9 |
| 2011 | 9.9°C | 3.9°C | -2.2°C | 20.3°C | -6.2°C | 56 mm | 60% | 1.7 m/s | 2.9 |
| 2010 | 12.9°C | 7.0°C | 1.1°C | 21.8°C | -14.0°C | 73 mm | 62% | 1.8 m/s | 2.5 |
| 2009 | 8.9°C | 3.0°C | -2.8°C | 16.4°C | -9.0°C | 52 mm | 57% | 1.9 m/s | 2.8 |
| 2008 | 10.4°C | 4.4°C | -1.7°C | 21.6°C | -6.4°C | 80 mm | 62% | 1.9 m/s | 2.7 |
| 2007 | 9.3°C | 3.4°C | -2.5°C | 21.7°C | -6.1°C | 62 mm | 58% | 1.9 m/s | 3.1 |
| 2006 | 12.2°C | 5.2°C | -1.8°C | 19.1°C | -5.5°C | 8 mm | 48% | 1.8 m/s | 3.1 |
| 2005 | 14.0°C | 6.9°C | -0.3°C | 20.2°C | -4.8°C | 0 mm | 38% | 1.7 m/s | 3.1 |
| 2004 | 11.6°C | 5.4°C | -0.7°C | 21.1°C | -5.1°C | 69 mm | 63% | 1.9 m/s | 3 |
| 2003 | 11.9°C | 5.5°C | -0.9°C | 19.5°C | -6.6°C | 16 mm | 49% | 1.9 m/s | 3.1 |
| 2002 | 11.0°C | 4.9°C | -1.3°C | 16.3°C | -5.3°C | 13 mm | 58% | 1.6 m/s | 2.9 |
| 2001 | 10.3°C | 3.9°C | -2.5°C | 16.3°C | -6.1°C | 24 mm | 54% | 1.8 m/s | 2.8 |
| 2000 | 14.4°C | 7.1°C | -0.2°C | 19.0°C | -4.2°C | 1 mm | 49% | 1.7 m/s | 3.2 |
| 1999 | 12.9°C | 5.6°C | -1.7°C | 17.5°C | -4.4°C | 0 mm | 36% | 2.1 m/s | 3.3 |
| 1998 | 12.1°C | 5.4°C | -1.3°C | 20.5°C | -6.1°C | 7 mm | 53% | 2.1 m/s | 3.2 |
| 1997 | 9.5°C | 3.5°C | -2.5°C | 16.1°C | -7.8°C | 56 mm | 58% | 2 m/s | 3 |
| 1996 | 12.5°C | 5.9°C | -0.7°C | 19.9°C | -6.9°C | 6 mm | 51% | 2 m/s | 3 |
| 1995 | 13.5°C | 6.6°C | -0.4°C | 20.9°C | -4.1°C | 4 mm | 47% | 1.6 m/s | 2.9 |
| 1994 | 11.5°C | 5.5°C | -0.5°C | 17.9°C | -5.4°C | 70 mm | 60% | 1.8 m/s | 2.6 |
| 1993 | 11.4°C | 4.7°C | -2.1°C | 18.2°C | -5.3°C | 10 mm | 50% | 2 m/s | 3.2 |
| 1992 | 8.3°C | 2.8°C | -2.7°C | 17.1°C | -8.5°C | 105 mm | 67% | 1.9 m/s | 2.7 |
| 1991 | 10.6°C | 4.8°C | -1.0°C | 15.9°C | -11.4°C | 49 mm | 69% | 1.8 m/s | 2.7 |
| 1990 ❄️ | 9.2°C | 2.7°C | -3.8°C | 19.2°C | -15.2°C | 20 mm | 52% | 2.1 m/s | 3 |
| 1989 | 14.2°C | 6.7°C | -0.7°C | 23.0°C | -5.1°C | 20 mm | 38% | 1.8 m/s | 3.2 |
| 1988 | 10.7°C | 4.1°C | -2.5°C | 18.1°C | -9.2°C | 12 mm | 53% | 2 m/s | 2.9 |
| 1987 | 8.5°C | 2.8°C | -2.9°C | 19.7°C | -9.8°C | 40 mm | 65% | 1.6 m/s | 2.7 |
| 1986 | 11.1°C | 4.7°C | -1.6°C | 18.5°C | -5.3°C | 40 mm | 60% | 1.6 m/s | 2.8 |
| 1985 | 12.7°C | 5.8°C | -1.1°C | 18.2°C | -6.3°C | 7 mm | 57% | 1.7 m/s | 3.1 |
| 1984 🌧️ | 9.5°C | 4.2°C | -1.0°C | 18.2°C | -5.6°C | 119 mm | 76% | 1.8 m/s | 2.4 |
| 1983 | 11.1°C | 5.2°C | -0.7°C | 16.2°C | -5.4°C | 50 mm | 67% | 1.8 m/s | — |
| 1982 | 9.9°C | 4.0°C | -1.9°C | 16.7°C | -6.4°C | 74 mm | 65% | 2.1 m/s | — |
| 1981 | 14.7°C | 7.6°C | 0.6°C | 21.2°C | -4.7°C | 7 mm | 55% | 1.7 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 11.8°C with lows near -0.9°C (mean 5.5°C), based on 45 years of NASA POWER data.
December averages 36 mm of rainfall in Prescott Valley, about average for rainfall. The wettest on record was 119 mm in 1984.
The hottest December reached 23°C in 1989. The coldest dipped to -15.2°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 2.6°C. Daytime highs moved from 11.6°C to 14.6°C and overnight lows from -0.8°C to 1.4°C over the same span.
December is one of the cooler months of the year in Prescott Valley and about average for rainfall, so plan for around 11.8°C daytime highs and -0.9°C at night.
Not quite — December is the 2nd coolest month in Prescott Valley, averaging 5.5°C.
For December in Prescott Valley, pack warm layers and a jacket for chilly mornings, with typical highs of 11.8°C and lows of -0.9°C.
Relative humidity in December averages 55% — relatively dry.
Average wind speed in December is 1.8 m/s. The windiest December on record averaged 2.1 m/s (1982).
The wettest December on record was 1984 with 119 mm. On average, December sees 36 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 Prescott 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.
