December is one of the cooler months of the year in Hemet, with average highs near 16.1°C and lows around 4°C (mean 10.1°C). It is a relatively wet time of year, averaging 49 mm of rainfall and 57% relative humidity across the period.
December is one of the cooler months of the year in Hemet. Across 45 years of records, the warmest December in Hemet was 2025 — when the month averaged 15°C — while the coldest was 1987 at 6.6°C. Typical December days reach 16.1°C with nights near 4°C. The long-term trend is warming, about 0.6°C per decade.
December is a relatively wet time of year in Hemet, averaging 49 mm of rainfall. The wettest December on record was 2010 with 195 mm, while the driest were 2000, 2017 and 2024 at 0 mm.
Relative humidity in Hemet during December averages 57%. The most humid December was 1983 at 70%, and the least humid was 2017 at 25%.
December receives about 3 kWh/m²/day of solar energy in Hemet. The sunniest December was 2006 at 3.4 kWh/m²/day, and the cloudiest were 2010, 2014 and 2019, among others at 2.7.
Average wind speed in Hemet during December is 1.2 m/s. The windiest Decembers were 1990 and 1996 at 1.5 m/s, while the calmest were 2005 and 2024 at 1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 9.4°C | 9.3°C | 9.8°C | 10.3°C | 12.3°C | +2.9°C |
| Avg High | 15.6°C | 15.6°C | 15.9°C | 16.2°C | 18.3°C | +2.7°C |
| Avg Low | 3.2°C | 3.0°C | 3.8°C | 4.5°C | 6.2°C | +3°C |
| Avg Rain | 53 mm | 37 mm | 49 mm | 61 mm | 43 mm | -10 mm |
December temperatures in Hemet have risen by about 2.9°C between 1981–1985 and 2021–2025.
December has ranged from a record low of -6.4°C (1990) to a record high of 27.4°C (2025).
Rainfall in December is a relatively wet time of year, averaging 49 mm, with a wettest year of 195 mm.
A quieter season to visit Hemet
If your dates are flexible, the more temperate months of June and September tend to be the most comfortable for visiting Hemet. That said, December — with days averaging 16.1°C and nights around 4°C (mean 10.1°C) and moderate rainfall (49 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 🔥 | 21.1°C | 15.0°C | 8.9°C | 27.4°C | 1.8°C | 47 mm | 51% | 1.1 m/s | — |
| 2024 | 21.0°C | 14.2°C | 7.4°C | 25.4°C | 3.3°C | 0 mm | 42% | 1 m/s | 3.1 |
| 2023 | 18.8°C | 12.8°C | 6.7°C | 24.0°C | 2.6°C | 21 mm | 57% | 1.1 m/s | 3 |
| 2022 | 15.9°C | 10.3°C | 4.7°C | 25.2°C | -0.3°C | 48 mm | 67% | 1.1 m/s | 2.8 |
| 2021 | 15.5°C | 10.2°C | 4.9°C | 27.0°C | -0.5°C | 117 mm | 65% | 1.3 m/s | 2.8 |
| 2020 | 17.8°C | 11.3°C | 4.8°C | 25.0°C | -0.5°C | 24 mm | 41% | 1.3 m/s | 3.2 |
| 2019 | 13.9°C | 9.2°C | 4.4°C | 22.4°C | -0.2°C | 78 mm | 67% | 1.3 m/s | 2.7 |
| 2018 | 16.1°C | 10.4°C | 4.7°C | 23.8°C | -1.8°C | 44 mm | 60% | 1.2 m/s | 3 |
| 2017 | 20.8°C | 13.7°C | 6.6°C | 27.0°C | -2.3°C | 0 mm | 25% | 1.2 m/s | 3.3 |
| 2016 | 15.8°C | 9.9°C | 4.0°C | 23.1°C | -2.6°C | 109 mm | 66% | 1.3 m/s | 2.9 |
| 2015 | 15.4°C | 9.1°C | 2.8°C | 26.9°C | -3.7°C | 39 mm | 54% | 1.3 m/s | 3.3 |
| 2014 | 16.1°C | 10.8°C | 5.6°C | 25.1°C | -2.1°C | 76 mm | 68% | 1.1 m/s | 2.7 |
| 2013 | 17.2°C | 10.5°C | 3.8°C | 24.6°C | -3.8°C | 10 mm | 48% | 1.2 m/s | 3.2 |
| 2012 | 15.0°C | 9.4°C | 3.9°C | 23.2°C | -2.4°C | 43 mm | 68% | 1.2 m/s | 3 |
| 2011 | 15.4°C | 9.2°C | 3.1°C | 24.3°C | -2.7°C | 15 mm | 51% | 1.1 m/s | 3.2 |
| 2010 🌧️ | 16.4°C | 11.0°C | 5.7°C | 25.9°C | -2.3°C | 195 mm | 67% | 1.3 m/s | 2.7 |
| 2009 | 14.5°C | 8.8°C | 3.1°C | 22.8°C | -2.6°C | 83 mm | 62% | 1.2 m/s | 2.9 |
| 2008 | 14.3°C | 8.7°C | 3.0°C | 27.1°C | -3.4°C | 103 mm | 65% | 1.3 m/s | 2.9 |
| 2007 | 13.9°C | 7.9°C | 1.9°C | 26.3°C | -4.2°C | 61 mm | 62% | 1.3 m/s | 3.3 |
| 2006 | 17.2°C | 10.4°C | 3.7°C | 24.2°C | -1.1°C | 22 mm | 46% | 1.3 m/s | 3.4 |
| 2005 | 18.4°C | 11.9°C | 5.5°C | 25.3°C | -0.6°C | 4 mm | 53% | 1 m/s | 3 |
| 2004 | 15.7°C | 9.7°C | 3.7°C | 24.0°C | -1.3°C | 100 mm | 64% | 1.4 m/s | 3.1 |
| 2003 | 15.8°C | 9.7°C | 3.7°C | 22.3°C | -1.9°C | 35 mm | 56% | 1.3 m/s | 2.9 |
| 2002 | 14.8°C | 9.4°C | 3.9°C | 20.3°C | -1.0°C | 55 mm | 66% | 1.2 m/s | 3.1 |
| 2001 | 14.9°C | 9.0°C | 3.1°C | 21.3°C | -0.9°C | 26 mm | 61% | 1.2 m/s | 3.1 |
| 2000 | 19.3°C | 12.9°C | 6.6°C | 24.4°C | 1.8°C | 0 mm | 41% | 1.2 m/s | 3.2 |
| 1999 | 17.8°C | 10.7°C | 3.5°C | 24.6°C | -1.5°C | 12 mm | 40% | 1.2 m/s | 3.3 |
| 1998 | 16.2°C | 9.7°C | 3.2°C | 24.4°C | -4.0°C | 21 mm | 50% | 1.4 m/s | 3.2 |
| 1997 | 14.1°C | 8.2°C | 2.3°C | 22.4°C | -3.4°C | 58 mm | 58% | 1.4 m/s | 3.3 |
| 1996 | 16.1°C | 10.2°C | 4.4°C | 21.6°C | -0.5°C | 51 mm | 63% | 1.5 m/s | 3 |
| 1995 | 17.9°C | 11.3°C | 4.7°C | 24.2°C | -0.7°C | 16 mm | 57% | 1.1 m/s | 3 |
| 1994 | 15.3°C | 9.2°C | 3.2°C | 21.3°C | -2.3°C | 28 mm | 60% | 1.2 m/s | 2.9 |
| 1993 | 16.0°C | 9.2°C | 2.4°C | 20.9°C | -1.8°C | 23 mm | 53% | 1.3 m/s | 3.2 |
| 1992 | 13.3°C | 7.3°C | 1.4°C | 20.1°C | -3.6°C | 100 mm | 64% | 1.3 m/s | 2.8 |
| 1991 | 14.8°C | 9.2°C | 3.6°C | 20.4°C | -3.4°C | 51 mm | 59% | 1.3 m/s | 2.9 |
| 1990 | 14.1°C | 7.5°C | 0.8°C | 22.3°C | -6.4°C | 14 mm | 44% | 1.5 m/s | 3.1 |
| 1989 | 18.4°C | 11.2°C | 4.0°C | 25.9°C | -1.7°C | 9 mm | 39% | 1.2 m/s | 3.1 |
| 1988 | 14.6°C | 8.3°C | 2.0°C | 25.2°C | -4.5°C | 56 mm | 56% | 1.4 m/s | 2.9 |
| 1987 ❄️ | 12.2°C | 6.6°C | 1.0°C | 24.6°C | -5.2°C | 49 mm | 64% | 1.3 m/s | 2.8 |
| 1986 | 16.6°C | 10.2°C | 3.7°C | 23.8°C | -2.4°C | 25 mm | 52% | 1.1 m/s | 2.9 |
| 1985 | 16.5°C | 10.1°C | 3.7°C | 22.3°C | -4.0°C | 26 mm | 59% | 1.1 m/s | 3 |
| 1984 | 13.4°C | 7.7°C | 2.0°C | 17.6°C | -2.6°C | 134 mm | 70% | 1.4 m/s | 2.7 |
| 1983 | 15.1°C | 9.6°C | 4.1°C | 21.5°C | -1.6°C | 92 mm | 70% | 1.3 m/s | — |
| 1982 | 14.5°C | 8.7°C | 2.9°C | 22.0°C | -3.6°C | 69 mm | 61% | 1.4 m/s | — |
| 1981 | 18.8°C | 12.1°C | 5.4°C | 23.7°C | -0.9°C | 20 mm | 54% | 1.1 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 16.1°C with lows near 4°C (mean 10.1°C), based on 45 years of NASA POWER data.
December averages 49 mm of rainfall in Hemet, a relatively wet time of year. The wettest on record was 195 mm in 2010.
The hottest December reached 27.4°C in 2025. The coldest dipped to -6.4°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 2.9°C. Daytime highs moved from 15.7°C to 18.5°C and overnight lows from 3.6°C to 6.5°C over the same span.
December is one of the cooler months of the year in Hemet and a relatively wet time of year, so plan for around 16.1°C daytime highs and 4°C at night.
Not quite — December is the 2nd coolest month in Hemet, averaging 10.1°C.
For December in Hemet, pack warm layers and a jacket for chilly mornings, with typical highs of 16.1°C and lows of 4°C.
Relative humidity in December averages 57% — moderately humid.
Average wind speed in December is 1.2 m/s. The windiest December on record averaged 1.5 m/s (1990).
The wettest December on record was 2010 with 195 mm. On average, December sees 49 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 Hemet 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.
