December is one of the warmer months of the year in Griffith, with average highs near 31.8°C and lows around 15.9°C (mean 23.9°C). It is about average for rainfall, averaging 38 mm of rainfall and 41% relative humidity across the period.
December is one of the warmer months of the year in Griffith. Across 45 years of records, the warmest December in Griffith was 2018 — when the month averaged 26.6°C — while the coldest were 1985 and 1992 at 20.9°C. Typical December days reach 31.8°C with nights near 15.9°C. The long-term trend is warming, about 0.3°C per decade.
December is about average for rainfall in Griffith, averaging 38 mm of rainfall. The wettest December on record was 1992 with 135 mm, while the driest was 2000 at 3 mm.
Relative humidity in Griffith during December averages 41%. The most humid December was 1992 at 66%, and the least humid was 2006 at 29%.
December receives about 7.9 kWh/m²/day of solar energy in Griffith. The sunniest December was 2024 at 8.6 kWh/m²/day, and the cloudiest was 1992 at 6.7.
Average wind speed in Griffith during December is 3.3 m/s. The windiest December was 1984 at 4 m/s, while the calmest was 2021 at 2.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.4°C | 23.5°C | 24.1°C | 24.7°C | 23.6°C | +0.2°C |
| Avg High | 31.3°C | 31.3°C | 32.2°C | 32.5°C | 31.5°C | +0.2°C |
| Avg Low | 15.5°C | 15.6°C | 15.9°C | 16.8°C | 15.7°C | +0.2°C |
| Avg Rain | 40 mm | 44 mm | 32 mm | 40 mm | 35 mm | -5 mm |
December temperatures in Griffith have risen by about 0.5°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 6.6°C (1987) to a record high of 45.7°C (2019).
Rainfall in December is about average for rainfall, averaging 38 mm, with a wettest year of 135 mm.
One of the best times to visit Griffith
December is one of the best times to visit Griffith. Expect days averaging 31.8°C and nights around 15.9°C (mean 23.9°C) — warmer than Griffith's yearly average — with moderate rainfall (38 mm), so conditions are generally comfortable for sightseeing and outdoor plans.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 32.2°C | 23.8°C | 15.5°C | 41.5°C | 7.6°C | 43 mm | 37% | 3.3 m/s | — |
| 2024 | 33.9°C | 25.9°C | 17.8°C | 42.7°C | 11.1°C | 33 mm | 40% | 3.1 m/s | 8.6 |
| 2023 | 32.2°C | 24.7°C | 17.2°C | 41.9°C | 11.3°C | 63 mm | 50% | 2.9 m/s | 7.5 |
| 2022 | 28.9°C | 21.4°C | 13.8°C | 38.0°C | 6.9°C | 24 mm | 53% | 3 m/s | 7.8 |
| 2021 | 31.0°C | 23.0°C | 14.9°C | 40.3°C | 8.4°C | 24 mm | 49% | 2.7 m/s | 8.3 |
| 2020 | 31.0°C | 23.0°C | 15.1°C | 41.0°C | 8.2°C | 21 mm | 39% | 3.5 m/s | 7.9 |
| 2019 | 35.0°C | 26.4°C | 17.8°C | 45.7°C | 8.6°C | 5 mm | 29% | 3.3 m/s | 8.4 |
| 2018 🔥 | 34.6°C | 26.6°C | 18.6°C | 44.2°C | 10.5°C | 32 mm | 40% | 3.2 m/s | 7.8 |
| 2017 | 32.3°C | 24.8°C | 17.2°C | 42.3°C | 8.8°C | 99 mm | 49% | 2.9 m/s | 7.4 |
| 2016 | 32.4°C | 24.4°C | 16.5°C | 38.6°C | 9.0°C | 54 mm | 46% | 3 m/s | 7.1 |
| 2015 | 33.3°C | 25.4°C | 17.4°C | 41.5°C | 9.8°C | 30 mm | 35% | 3.2 m/s | 8.1 |
| 2014 | 32.7°C | 24.9°C | 17.0°C | 37.7°C | 12.4°C | 34 mm | 39% | 3.1 m/s | 7.9 |
| 2013 | 33.2°C | 24.7°C | 16.2°C | 42.7°C | 6.7°C | 27 mm | 35% | 3.2 m/s | 8.1 |
| 2012 | 32.6°C | 24.7°C | 16.8°C | 40.6°C | 10.1°C | 19 mm | 36% | 3.4 m/s | 8.2 |
| 2011 | 30.3°C | 22.8°C | 15.3°C | 37.6°C | 8.7°C | 37 mm | 47% | 3.1 m/s | 7.9 |
| 2010 | 28.8°C | 21.8°C | 14.8°C | 40.6°C | 6.8°C | 63 mm | 59% | 3.2 m/s | 7.9 |
| 2009 | 32.9°C | 24.3°C | 15.7°C | 41.8°C | 11.1°C | 51 mm | 41% | 3 m/s | 8.1 |
| 2008 | 29.8°C | 22.4°C | 15.0°C | 37.4°C | 9.5°C | 46 mm | 44% | 3.4 m/s | 7.9 |
| 2007 | 31.2°C | 23.6°C | 16.1°C | 39.5°C | 8.9°C | 85 mm | 50% | 3.1 m/s | 7.8 |
| 2006 | 33.1°C | 24.7°C | 16.4°C | 41.4°C | 7.9°C | 5 mm | 29% | 3.4 m/s | 8 |
| 2005 | 32.9°C | 24.2°C | 15.6°C | 44.7°C | 11.5°C | 27 mm | 37% | 3.5 m/s | 8.3 |
| 2004 | 30.9°C | 22.9°C | 15.0°C | 39.5°C | 8.3°C | 41 mm | 45% | 3.4 m/s | 7.8 |
| 2003 | 33.2°C | 25.4°C | 17.5°C | 42.6°C | 12.2°C | 48 mm | 45% | 3 m/s | 7.8 |
| 2002 | 33.7°C | 25.4°C | 17.0°C | 43.0°C | 8.3°C | 16 mm | 30% | 3.4 m/s | 7.8 |
| 2001 | 30.9°C | 22.9°C | 14.9°C | 40.9°C | 9.7°C | 3 mm | 31% | 3.3 m/s | 7.8 |
| 2000 | 33.4°C | 24.8°C | 16.1°C | 41.7°C | 9.1°C | 3 mm | 34% | 3.1 m/s | 8.5 |
| 1999 | 29.0°C | 21.7°C | 14.4°C | 38.7°C | 8.8°C | 95 mm | 50% | 3.5 m/s | 7.6 |
| 1998 | 33.4°C | 25.1°C | 16.7°C | 41.5°C | 9.3°C | 16 mm | 37% | 3.1 m/s | 8.3 |
| 1997 | 34.1°C | 25.8°C | 17.6°C | 42.4°C | 12.4°C | 16 mm | 31% | 3.2 m/s | 8.5 |
| 1996 | 31.4°C | 23.1°C | 14.9°C | 41.9°C | 10.8°C | 24 mm | 37% | 3.4 m/s | 8.1 |
| 1995 | 29.9°C | 21.5°C | 13.2°C | 39.0°C | 7.3°C | 25 mm | 41% | 3.1 m/s | 7.8 |
| 1994 | 34.9°C | 26.1°C | 17.2°C | 42.8°C | 9.8°C | 21 mm | 32% | 3.2 m/s | 8.5 |
| 1993 | 29.3°C | 21.9°C | 14.6°C | 42.5°C | 7.9°C | 65 mm | 50% | 3.6 m/s | 7.2 |
| 1992 🌧️ | 27.2°C | 20.9°C | 14.7°C | 34.2°C | 9.3°C | 135 mm | 66% | 2.9 m/s | 6.7 |
| 1991 | 30.0°C | 22.4°C | 14.8°C | 42.1°C | 8.4°C | 26 mm | 41% | 3.3 m/s | 7.3 |
| 1990 | 34.2°C | 26.2°C | 18.2°C | 41.9°C | 8.7°C | 14 mm | 30% | 3.5 m/s | 8.1 |
| 1989 | 32.9°C | 24.5°C | 16.2°C | 41.0°C | 9.1°C | 13 mm | 36% | 3.5 m/s | 8.1 |
| 1988 | 31.5°C | 24.0°C | 16.5°C | 39.3°C | 9.8°C | 110 mm | 54% | 3.1 m/s | 7.4 |
| 1987 | 32.6°C | 24.3°C | 16.0°C | 40.7°C | 6.6°C | 28 mm | 35% | 3.5 m/s | 8.2 |
| 1986 | 29.3°C | 21.3°C | 13.3°C | 38.3°C | 7.9°C | 38 mm | 45% | 3.6 m/s | 8 |
| 1985 ❄️ | 27.9°C | 20.9°C | 13.9°C | 34.4°C | 10.0°C | 68 mm | 52% | 3.2 m/s | 7.6 |
| 1984 | 31.3°C | 23.0°C | 14.8°C | 40.6°C | 9.4°C | 8 mm | 32% | 4 m/s | 8.3 |
| 1983 | 31.4°C | 23.6°C | 15.8°C | 40.6°C | 8.8°C | 74 mm | 46% | 3.4 m/s | — |
| 1982 | 33.3°C | 25.4°C | 17.5°C | 40.6°C | 9.7°C | 4 mm | 29% | 3.4 m/s | — |
| 1981 | 31.9°C | 23.7°C | 15.6°C | 39.9°C | 9.8°C | 16 mm | 35% | 3.2 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 31.8°C with lows near 15.9°C (mean 23.9°C), based on 45 years of NASA POWER data.
December averages 38 mm of rainfall in Griffith, about average for rainfall. The wettest on record was 135 mm in 1992.
The hottest December reached 45.7°C in 2019. The coldest dipped to 6.6°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 0.5°C. Daytime highs moved from 31.2°C to 31.6°C and overnight lows from 15.5°C to 15.8°C over the same span.
December is one of the warmer months of the year in Griffith and about average for rainfall, so plan for around 31.8°C daytime highs and 15.9°C at night.
Not quite — December is the 10th coolest month in Griffith, averaging 23.9°C.
For December in Griffith, pack light, breathable clothing and sun protection, with typical highs of 31.8°C and lows of 15.9°C.
Relative humidity in December averages 41% — relatively dry.
Average wind speed in December is 3.3 m/s. The windiest December on record averaged 4 m/s (1984).
The wettest December on record was 1992 with 135 mm. On average, December sees 38 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 Griffith 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.
