December is one of the cooler months of the year in Lake Havasu City, with average highs near 17.8°C and lows around 5°C (mean 11.4°C). It is about average for rainfall, averaging 17 mm of rainfall and 42% relative humidity across the period.
December is one of the cooler months of the year in Lake Havasu City. Across 45 years of records, the warmest December in Lake Havasu City was 2024 — when the month averaged 15.8°C — while the coldest were 1987 and 1990 at 8.4°C. Typical December days reach 17.8°C with nights near 5°C. The long-term trend is warming, about 0.6°C per decade.
December is about average for rainfall in Lake Havasu City, averaging 17 mm of rainfall. The wettest December on record was 1984 with 87 mm, while the driest were 2005, 2017 and 2024, among others at 0 mm.
Relative humidity in Lake Havasu City during December averages 42%. The most humid December was 1984 at 63%, and the least humid was 2017 at 18%.
December receives about 3 kWh/m²/day of solar energy in Lake Havasu City. The sunniest Decembers were 1989 and 2017 at 3.3 kWh/m²/day, and the cloudiest was 2010 at 2.5.
Average wind speed in Lake Havasu City during December is 2.4 m/s. The windiest December was 1998 at 3 m/s, while the calmest was 2023 at 1.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 10.8°C | 10.7°C | 10.8°C | 11.7°C | 13.7°C | +2.9°C |
| Avg High | 17.2°C | 17.3°C | 17.2°C | 17.8°C | 20.1°C | +2.9°C |
| Avg Low | 4.3°C | 4.0°C | 4.4°C | 5.6°C | 7.4°C | +3.1°C |
| Avg Rain | 22 mm | 15 mm | 14 mm | 22 mm | 9 mm | -14 mm |
December temperatures in Lake Havasu City have risen by about 2.8°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -5.9°C (1990) to a record high of 28°C (2021).
Rainfall in December is about average for rainfall, averaging 17 mm, with a wettest year of 87 mm.
A quieter season to visit Lake Havasu City
If your dates are flexible, the more temperate months of October and April tend to be the most comfortable for visiting Lake Havasu City. That said, December — with days averaging 17.8°C and nights around 5°C (mean 11.4°C) and low rainfall (17 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 | 22.2°C | 15.7°C | 9.3°C | 26.4°C | 4.2°C | 18 mm | 43% | 2.1 m/s | — |
| 2024 🔥 | 22.6°C | 15.8°C | 9.0°C | 26.6°C | 3.8°C | 0 mm | 25% | 2.1 m/s | 3.1 |
| 2023 | 20.5°C | 14.2°C | 7.9°C | 25.9°C | 3.5°C | 5 mm | 34% | 1.9 m/s | 3 |
| 2022 | 17.7°C | 11.8°C | 5.9°C | 25.3°C | -0.4°C | 9 mm | 46% | 2 m/s | 2.9 |
| 2021 | 18.5°C | 12.7°C | 6.9°C | 28.0°C | 1.0°C | 20 mm | 43% | 2.2 m/s | 2.8 |
| 2020 | 19.1°C | 12.2°C | 5.4°C | 25.2°C | 0.6°C | 1 mm | 26% | 2.5 m/s | 3.1 |
| 2019 | 16.1°C | 10.9°C | 5.7°C | 20.6°C | -1.1°C | 25 mm | 57% | 2.1 m/s | 2.7 |
| 2018 | 17.9°C | 11.8°C | 5.7°C | 23.5°C | -0.6°C | 14 mm | 40% | 2 m/s | 2.9 |
| 2017 | 21.7°C | 14.4°C | 7.2°C | 27.0°C | -0.2°C | 0 mm | 18% | 2.7 m/s | 3.3 |
| 2016 | 18.1°C | 12.1°C | 6.1°C | 24.1°C | 0.1°C | 48 mm | 47% | 2.5 m/s | 2.8 |
| 2015 | 17.2°C | 10.8°C | 4.3°C | 25.4°C | -0.6°C | 3 mm | 34% | 2.4 m/s | 3.2 |
| 2014 | 17.3°C | 11.9°C | 6.5°C | 24.1°C | -0.4°C | 25 mm | 51% | 2 m/s | 2.6 |
| 2013 | 17.8°C | 10.6°C | 3.4°C | 24.6°C | -3.2°C | 1 mm | 40% | 2.8 m/s | 3.2 |
| 2012 | 17.0°C | 11.2°C | 5.4°C | 25.3°C | -0.9°C | 34 mm | 46% | 2.2 m/s | 3 |
| 2011 | 15.9°C | 9.8°C | 3.6°C | 24.4°C | -2.0°C | 24 mm | 46% | 2.3 m/s | 3 |
| 2010 | 19.1°C | 13.4°C | 7.6°C | 27.6°C | -3.4°C | 43 mm | 48% | 2.5 m/s | 2.5 |
| 2009 | 15.4°C | 9.4°C | 3.3°C | 22.1°C | -1.1°C | 30 mm | 42% | 2.5 m/s | 2.9 |
| 2008 | 15.9°C | 10.0°C | 4.2°C | 25.5°C | -1.3°C | 46 mm | 52% | 2.2 m/s | 2.8 |
| 2007 | 14.8°C | 8.7°C | 2.7°C | 22.7°C | -1.9°C | 13 mm | 47% | 2.6 m/s | 3.1 |
| 2006 | 17.9°C | 10.9°C | 3.9°C | 24.3°C | -1.3°C | 1 mm | 34% | 2.6 m/s | 3.2 |
| 2005 | 19.1°C | 12.5°C | 5.9°C | 26.0°C | 0.0°C | 0 mm | 31% | 2.5 m/s | 2.9 |
| 2004 | 17.0°C | 10.8°C | 4.6°C | 23.5°C | -1.2°C | 23 mm | 57% | 2.7 m/s | 3.1 |
| 2003 | 18.1°C | 11.5°C | 4.9°C | 24.4°C | -2.8°C | 11 mm | 37% | 2.2 m/s | 3.1 |
| 2002 | 17.2°C | 10.8°C | 4.5°C | 21.7°C | 0.5°C | 3 mm | 46% | 2 m/s | 3 |
| 2001 | 16.4°C | 9.9°C | 3.5°C | 21.6°C | -1.6°C | 9 mm | 40% | 2.4 m/s | 3 |
| 2000 | 20.2°C | 13.3°C | 6.3°C | 24.8°C | 2.4°C | 0 mm | 34% | 2.1 m/s | 3.1 |
| 1999 | 19.3°C | 12.0°C | 4.7°C | 25.3°C | 0.8°C | 0 mm | 25% | 2.9 m/s | 3.2 |
| 1998 | 18.3°C | 11.1°C | 3.9°C | 27.0°C | -2.1°C | 4 mm | 40% | 3 m/s | 3.2 |
| 1997 | 16.3°C | 9.7°C | 3.1°C | 22.1°C | -2.5°C | 30 mm | 43% | 2.8 m/s | 3.2 |
| 1996 | 18.3°C | 11.5°C | 4.8°C | 24.1°C | -2.8°C | 3 mm | 44% | 2.6 m/s | 2.9 |
| 1995 | 19.7°C | 13.1°C | 6.4°C | 25.3°C | 0.7°C | 1 mm | 34% | 2.1 m/s | 3 |
| 1994 | 16.8°C | 10.6°C | 4.5°C | 21.9°C | -2.8°C | 38 mm | 49% | 2.1 m/s | 2.7 |
| 1993 | 17.3°C | 10.3°C | 3.2°C | 23.0°C | -1.3°C | 3 mm | 36% | 2.5 m/s | 3.2 |
| 1992 | 14.7°C | 8.6°C | 2.6°C | 18.8°C | -3.3°C | 56 mm | 54% | 2.5 m/s | 2.9 |
| 1991 | 17.4°C | 11.5°C | 5.5°C | 21.9°C | -1.2°C | 17 mm | 50% | 2.2 m/s | 3 |
| 1990 | 15.3°C | 8.4°C | 1.5°C | 23.5°C | -5.9°C | 1 mm | 34% | 2.7 m/s | 3.2 |
| 1989 | 19.6°C | 12.3°C | 4.9°C | 26.7°C | -1.2°C | 7 mm | 28% | 2.4 m/s | 3.3 |
| 1988 | 17.0°C | 10.2°C | 3.4°C | 24.0°C | -4.3°C | 4 mm | 37% | 2.6 m/s | 3.1 |
| 1987 ❄️ | 14.3°C | 8.4°C | 2.4°C | 23.9°C | -3.6°C | 19 mm | 50% | 2.5 m/s | 2.9 |
| 1986 | 16.7°C | 10.4°C | 4.0°C | 21.1°C | -1.3°C | 27 mm | 49% | 2.1 m/s | 2.8 |
| 1985 | 18.0°C | 11.2°C | 4.3°C | 22.1°C | -2.2°C | 3 mm | 45% | 2.2 m/s | 3.1 |
| 1984 🌧️ | 15.4°C | 9.8°C | 4.2°C | 21.7°C | -0.7°C | 87 mm | 63% | 2.3 m/s | 2.6 |
| 1983 | 17.4°C | 11.4°C | 5.4°C | 22.7°C | 0.0°C | 20 mm | 52% | 2.2 m/s | — |
| 1982 | 16.5°C | 10.2°C | 3.9°C | 22.4°C | -2.0°C | 36 mm | 50% | 2.7 m/s | — |
| 1981 | 20.1°C | 13.3°C | 6.5°C | 24.7°C | -1.0°C | 1 mm | 42% | 2 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 17.8°C with lows near 5°C (mean 11.4°C), based on 45 years of NASA POWER data.
December averages 17 mm of rainfall in Lake Havasu City, about average for rainfall. The wettest on record was 87 mm in 1984.
The hottest December reached 28°C in 2021. 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 2.8°C. Daytime highs moved from 17.5°C to 20.3°C and overnight lows from 4.9°C to 7.8°C over the same span.
December is one of the cooler months of the year in Lake Havasu City and about average for rainfall, so plan for around 17.8°C daytime highs and 5°C at night.
Yes — December is the coldest month of the year in Lake Havasu City, averaging 11.4°C.
For December in Lake Havasu City, pack warm layers and a jacket for chilly mornings, with typical highs of 17.8°C and lows of 5°C.
Relative humidity in December averages 42% — relatively dry.
Average wind speed in December is 2.4 m/s. The windiest December on record averaged 3 m/s (1998).
The wettest December on record was 1984 with 87 mm. On average, December sees 17 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 Lake Havasu City 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.
