December is one of the cooler months of the year in Yuma, with average highs near 19.9°C and lows around 6.4°C (mean 13.2°C). It is about average for rainfall, averaging 13 mm of rainfall and 43% relative humidity across the period.
December is one of the cooler months of the year in Yuma. Across 45 years of records, the warmest December in Yuma was 2025 — when the month averaged 17.2°C — while the coldest was 1987 at 10.4°C. Typical December days reach 19.9°C with nights near 6.4°C. The long-term trend is warming, about 0.6°C per decade.
December is about average for rainfall in Yuma, averaging 13 mm of rainfall. The wettest December on record was 1984 with 65 mm, while the driest were 2005, 2017 and 2024, among others at 0 mm.
Relative humidity in Yuma during December averages 43%. The most humid December was 1984 at 62%, and the least humid was 2017 at 19%.
December receives about 3.3 kWh/m²/day of solar energy in Yuma. The sunniest Decembers were 2006, 2007 and 2015, among others at 3.5 kWh/m²/day, and the cloudiest was 1984 at 2.7.
Average wind speed in Yuma during December is 2.3 m/s. The windiest December was 1999 at 2.9 m/s, while the calmest was 2022 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 12.6°C | 12.3°C | 12.6°C | 13.6°C | 15.4°C | +2.8°C |
| Avg High | 19.3°C | 19.2°C | 19.5°C | 20.1°C | 22.3°C | +3°C |
| Avg Low | 5.8°C | 5.4°C | 5.8°C | 7.1°C | 8.5°C | +2.7°C |
| Avg Rain | 19 mm | 16 mm | 7 mm | 13 mm | 8 mm | -11 mm |
December temperatures in Yuma have risen by about 2.8°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -5.6°C (1990) to a record high of 30.3°C (2021).
Rainfall in December is about average for rainfall, averaging 13 mm, with a wettest year of 65 mm.
A quieter season to visit Yuma
If your dates are flexible, the more temperate months of April and October tend to be the most comfortable for visiting Yuma. That said, December — with days averaging 19.9°C and nights around 6.4°C (mean 13.2°C) and low rainfall (13 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 🔥 | 24.2°C | 17.2°C | 10.2°C | 28.1°C | 5.5°C | 8 mm | 44% | 2.1 m/s | — |
| 2024 | 24.6°C | 17.1°C | 9.7°C | 28.0°C | 6.3°C | 0 mm | 27% | 1.9 m/s | 3.4 |
| 2023 | 22.5°C | 15.6°C | 8.7°C | 27.8°C | 5.0°C | 22 mm | 37% | 2 m/s | 3.3 |
| 2022 | 19.8°C | 13.5°C | 7.1°C | 26.2°C | 2.1°C | 5 mm | 46% | 1.8 m/s | 3.1 |
| 2021 | 21.4°C | 14.9°C | 8.5°C | 30.3°C | 2.8°C | 10 mm | 42% | 2.1 m/s | 3.2 |
| 2020 | 21.1°C | 14.0°C | 6.9°C | 25.8°C | 3.6°C | 2 mm | 26% | 2.4 m/s | 3.3 |
| 2019 | 18.7°C | 13.0°C | 7.3°C | 23.6°C | 0.8°C | 11 mm | 54% | 2.3 m/s | 3 |
| 2018 | 19.8°C | 13.5°C | 7.1°C | 24.5°C | 1.2°C | 16 mm | 43% | 2.1 m/s | 3.2 |
| 2017 | 23.4°C | 16.0°C | 8.7°C | 29.9°C | 2.3°C | 0 mm | 19% | 2.3 m/s | 3.4 |
| 2016 | 20.8°C | 14.5°C | 8.1°C | 27.3°C | 1.2°C | 32 mm | 45% | 2.5 m/s | 3.1 |
| 2015 | 19.6°C | 12.7°C | 5.7°C | 26.4°C | 1.0°C | 3 mm | 35% | 2.6 m/s | 3.5 |
| 2014 | 20.3°C | 14.4°C | 8.5°C | 26.3°C | 1.2°C | 13 mm | 48% | 2 m/s | 3 |
| 2013 | 19.1°C | 12.1°C | 5.1°C | 25.9°C | -0.7°C | 5 mm | 44% | 2.5 m/s | 3.4 |
| 2012 | 20.1°C | 13.6°C | 7.2°C | 28.2°C | 1.4°C | 15 mm | 47% | 2.2 m/s | 3.4 |
| 2011 | 17.9°C | 11.2°C | 4.5°C | 25.1°C | 0.7°C | 18 mm | 45% | 2.2 m/s | 3.4 |
| 2010 | 21.1°C | 14.7°C | 8.3°C | 28.3°C | 0.0°C | 19 mm | 47% | 2.2 m/s | 3 |
| 2009 | 18.1°C | 11.8°C | 5.5°C | 23.5°C | 0.6°C | 7 mm | 41% | 2.4 m/s | 3.1 |
| 2008 | 18.7°C | 12.3°C | 5.9°C | 26.2°C | -0.3°C | 20 mm | 52% | 2.3 m/s | 3.1 |
| 2007 | 17.1°C | 10.5°C | 3.9°C | 23.2°C | -0.2°C | 6 mm | 49% | 2.6 m/s | 3.5 |
| 2006 | 19.7°C | 12.6°C | 5.4°C | 26.3°C | 0.0°C | 1 mm | 33% | 2.6 m/s | 3.5 |
| 2005 | 21.2°C | 14.1°C | 7.0°C | 27.0°C | 0.7°C | 0 mm | 30% | 2.2 m/s | 3.2 |
| 2004 | 19.1°C | 12.5°C | 5.8°C | 26.6°C | 0.0°C | 26 mm | 54% | 2.6 m/s | 3.3 |
| 2003 | 20.5°C | 13.5°C | 6.4°C | 26.3°C | -0.7°C | 2 mm | 37% | 2.4 m/s | 3.4 |
| 2002 | 19.5°C | 12.8°C | 6.1°C | 23.2°C | 1.0°C | 1 mm | 45% | 2.1 m/s | 3.2 |
| 2001 | 18.8°C | 11.8°C | 4.8°C | 25.1°C | 1.0°C | 5 mm | 40% | 2.4 m/s | 3.4 |
| 2000 | 21.9°C | 14.6°C | 7.3°C | 27.1°C | 2.9°C | 0 mm | 36% | 2.1 m/s | 3.4 |
| 1999 | 20.6°C | 13.4°C | 6.2°C | 24.3°C | 2.9°C | 0 mm | 25% | 2.9 m/s | 3.5 |
| 1998 | 19.3°C | 12.0°C | 4.7°C | 25.7°C | -1.5°C | 3 mm | 43% | 2.7 m/s | 3.5 |
| 1997 | 17.7°C | 11.1°C | 4.5°C | 23.1°C | -1.2°C | 48 mm | 49% | 2.7 m/s | 3.3 |
| 1996 | 21.2°C | 13.8°C | 6.4°C | 27.0°C | 1.0°C | 1 mm | 41% | 2.4 m/s | 3.5 |
| 1995 | 21.9°C | 14.8°C | 7.8°C | 28.5°C | 2.0°C | 0 mm | 34% | 2.1 m/s | 3.3 |
| 1994 | 18.5°C | 12.0°C | 5.5°C | 22.8°C | -0.9°C | 39 mm | 53% | 2 m/s | 2.9 |
| 1993 | 18.9°C | 11.7°C | 4.4°C | 23.2°C | -0.3°C | 0 mm | 40% | 2.4 m/s | 3.4 |
| 1992 | 17.0°C | 10.6°C | 4.3°C | 20.4°C | -1.3°C | 55 mm | 54% | 2.4 m/s | 3.1 |
| 1991 | 19.0°C | 12.9°C | 6.8°C | 23.0°C | 0.4°C | 12 mm | 55% | 2.2 m/s | 3 |
| 1990 | 17.9°C | 10.7°C | 3.5°C | 24.4°C | -5.6°C | 2 mm | 35% | 2.8 m/s | 3.2 |
| 1989 | 20.9°C | 13.8°C | 6.7°C | 25.5°C | 0.6°C | 3 mm | 29% | 2.4 m/s | 3.4 |
| 1988 | 19.1°C | 12.2°C | 5.3°C | 25.2°C | -2.0°C | 1 mm | 38% | 2.6 m/s | 3.3 |
| 1987 ❄️ | 16.9°C | 10.4°C | 3.9°C | 24.9°C | -3.1°C | 21 mm | 48% | 2.4 m/s | 2.9 |
| 1986 | 19.2°C | 12.3°C | 5.4°C | 24.2°C | 0.3°C | 13 mm | 45% | 2.1 m/s | 3.2 |
| 1985 | 19.7°C | 12.5°C | 5.3°C | 23.7°C | -2.3°C | 7 mm | 47% | 2.1 m/s | 3.4 |
| 1984 🌧️ | 17.6°C | 11.8°C | 5.9°C | 21.2°C | 0.8°C | 65 mm | 62% | 2.4 m/s | 2.7 |
| 1983 | 20.1°C | 13.6°C | 7.1°C | 24.8°C | 1.0°C | 22 mm | 53% | 2.5 m/s | — |
| 1982 | 18.4°C | 11.8°C | 5.2°C | 22.6°C | -0.6°C | 39 mm | 52% | 2.8 m/s | — |
| 1981 | 21.9°C | 14.6°C | 7.3°C | 26.1°C | 1.3°C | 0 mm | 43% | 2.2 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 19.9°C with lows near 6.4°C (mean 13.2°C), based on 45 years of NASA POWER data.
December averages 13 mm of rainfall in Yuma, about average for rainfall. The wettest on record was 65 mm in 1984.
The hottest December reached 30.3°C in 2021. The coldest dipped to -5.6°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 2.8°C. Daytime highs moved from 19.5°C to 22.5°C and overnight lows from 6.2°C to 8.8°C over the same span.
December is one of the cooler months of the year in Yuma and about average for rainfall, so plan for around 19.9°C daytime highs and 6.4°C at night.
Yes — December is the coldest month of the year in Yuma, averaging 13.2°C.
For December in Yuma, pack warm layers and a jacket for chilly mornings, with typical highs of 19.9°C and lows of 6.4°C.
Relative humidity in December averages 43% — relatively dry.
Average wind speed in December is 2.3 m/s. The windiest December on record averaged 2.9 m/s (1999).
The wettest December on record was 1984 with 65 mm. On average, December sees 13 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 Yuma 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.
