December is one of the warmer months of the year in Cowell, with average highs near 28.5°C and lows around 14.9°C (mean 21.7°C). It is about average for rainfall, averaging 20 mm of rainfall and 53% relative humidity across the period.
December is one of the warmer months of the year in Cowell. Across 45 years of records, the warmest Decembers in Cowell were 2015 and 2019 — when the month averaged 24.8°C — while the coldest was 2001 at 18.6°C. Typical December days reach 28.5°C with nights near 14.9°C. The long-term trend is warming, about 0.4°C per decade.
December is about average for rainfall in Cowell, averaging 20 mm of rainfall. The wettest December on record was 1992 with 104 mm, while the driest were 2016, 2017 and 2018 at 0 mm.
Relative humidity in Cowell during December averages 53%. The most humid December was 1992 at 70%, and the least humid was 2015 at 42%.
December receives about 7.7 kWh/m²/day of solar energy in Cowell. The sunniest December was 2009 at 8.5 kWh/m²/day, and the cloudiest was 1992 at 6.4.
Average wind speed in Cowell during December is 4.3 m/s. The windiest Decembers were 2002 and 2020 at 4.8 m/s, while the calmest was 2015 at 3.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 21.3°C | 21.0°C | 21.6°C | 22.8°C | 21.7°C | +0.4°C |
| Avg High | 28.2°C | 27.5°C | 28.5°C | 29.8°C | 28.4°C | +0.2°C |
| Avg Low | 14.4°C | 14.5°C | 14.8°C | 15.7°C | 15.0°C | +0.6°C |
| Avg Rain | 14 mm | 32 mm | 24 mm | 15 mm | 11 mm | -3 mm |
December temperatures in Cowell have risen by about 0.5°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 9°C (1996) to a record high of 45.7°C (2019).
Rainfall in December is about average for rainfall, averaging 20 mm, with a wettest year of 104 mm.
One of the best times to visit Cowell
December is one of the best times to visit Cowell. Expect days averaging 28.5°C and nights around 14.9°C (mean 21.7°C) — warmer than Cowell's yearly average — with low rainfall (20 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 | 29.8°C | 22.4°C | 15.1°C | 41.5°C | 10.5°C | 16 mm | 48% | 4.5 m/s | — |
| 2024 | 29.4°C | 22.7°C | 16.0°C | 39.2°C | 13.3°C | 10 mm | 54% | 4.1 m/s | 8.2 |
| 2023 | 28.1°C | 21.6°C | 15.1°C | 40.3°C | 11.8°C | 5 mm | 55% | 4.7 m/s | 7.1 |
| 2022 | 28.0°C | 21.4°C | 14.8°C | 39.6°C | 10.2°C | 22 mm | 55% | 4.3 m/s | 8.1 |
| 2021 | 28.4°C | 21.5°C | 14.7°C | 39.4°C | 10.9°C | 4 mm | 54% | 4.3 m/s | 8.2 |
| 2020 | 26.8°C | 20.6°C | 14.4°C | 38.2°C | 11.3°C | 9 mm | 54% | 4.8 m/s | 8 |
| 2019 | 32.8°C | 24.8°C | 16.8°C | 45.7°C | 10.2°C | 1 mm | 45% | 4.3 m/s | 8.3 |
| 2018 | 30.8°C | 23.7°C | 16.6°C | 42.4°C | 12.0°C | 0 mm | 50% | 4.6 m/s | 7.3 |
| 2017 | 29.4°C | 22.4°C | 15.4°C | 41.3°C | 11.3°C | 0 mm | 52% | 4.3 m/s | 7.4 |
| 2016 | 30.1°C | 22.9°C | 15.7°C | 41.1°C | 10.9°C | 0 mm | 51% | 4.3 m/s | 7.4 |
| 2015 🔥 | 32.3°C | 24.8°C | 17.4°C | 42.5°C | 11.8°C | 24 mm | 42% | 3.8 m/s | 8.1 |
| 2014 | 28.1°C | 21.5°C | 15.0°C | 37.9°C | 12.4°C | 14 mm | 56% | 4.4 m/s | 8 |
| 2013 | 29.8°C | 22.6°C | 15.4°C | 42.9°C | 10.0°C | 23 mm | 49% | 4.2 m/s | 7.6 |
| 2012 | 29.1°C | 22.1°C | 15.1°C | 40.2°C | 10.4°C | 5 mm | 50% | 4.2 m/s | 8.3 |
| 2011 | 28.2°C | 21.8°C | 15.4°C | 39.8°C | 11.1°C | 39 mm | 54% | 4.1 m/s | 7.7 |
| 2010 | 27.3°C | 20.9°C | 14.4°C | 40.6°C | 10.6°C | 45 mm | 58% | 4.3 m/s | 7.5 |
| 2009 | 29.1°C | 22.0°C | 15.0°C | 40.5°C | 10.6°C | 14 mm | 52% | 4 m/s | 8.5 |
| 2008 | 27.1°C | 20.8°C | 14.4°C | 34.4°C | 10.2°C | 48 mm | 59% | 4.1 m/s | 7.4 |
| 2007 | 29.3°C | 22.3°C | 15.3°C | 40.5°C | 11.2°C | 44 mm | 51% | 4.1 m/s | 7.8 |
| 2006 | 28.5°C | 21.6°C | 14.7°C | 41.1°C | 10.8°C | 31 mm | 49% | 4.5 m/s | 7.9 |
| 2005 | 29.9°C | 22.1°C | 14.3°C | 42.4°C | 10.0°C | 22 mm | 51% | 4.7 m/s | 7.9 |
| 2004 | 27.5°C | 21.1°C | 14.7°C | 37.8°C | 11.4°C | 30 mm | 56% | 4.4 m/s | 7.5 |
| 2003 | 30.0°C | 22.8°C | 15.6°C | 39.2°C | 11.8°C | 16 mm | 53% | 4.2 m/s | 8 |
| 2002 | 29.1°C | 21.8°C | 14.6°C | 41.5°C | 10.3°C | 7 mm | 51% | 4.8 m/s | 7.5 |
| 2001 ❄️ | 24.4°C | 18.6°C | 12.8°C | 36.3°C | 9.7°C | 21 mm | 62% | 4.4 m/s | 7.2 |
| 2000 | 30.1°C | 23.1°C | 16.2°C | 40.8°C | 12.9°C | 5 mm | 50% | 4.3 m/s | 8 |
| 1999 | 26.7°C | 20.8°C | 14.9°C | 37.5°C | 11.8°C | 22 mm | 56% | 4.7 m/s | 7.4 |
| 1998 | 28.9°C | 22.0°C | 15.1°C | 39.2°C | 11.0°C | 12 mm | 54% | 4.3 m/s | 7.9 |
| 1997 | 28.8°C | 21.8°C | 14.8°C | 36.1°C | 12.0°C | 45 mm | 59% | 4.1 m/s | 7.8 |
| 1996 | 27.2°C | 20.7°C | 14.2°C | 38.2°C | 9.0°C | 14 mm | 53% | 4.4 m/s | 8 |
| 1995 | 27.1°C | 20.4°C | 13.6°C | 36.6°C | 9.5°C | 12 mm | 54% | 4.4 m/s | 7.5 |
| 1994 | 30.6°C | 23.1°C | 15.5°C | 42.2°C | 10.2°C | 9 mm | 46% | 4.3 m/s | 7.9 |
| 1993 | 26.5°C | 20.4°C | 14.3°C | 34.8°C | 10.2°C | 43 mm | 57% | 4.4 m/s | 7.3 |
| 1992 🌧️ | 24.8°C | 19.5°C | 14.2°C | 35.0°C | 11.3°C | 104 mm | 70% | 4.3 m/s | 6.4 |
| 1991 | 26.8°C | 20.3°C | 13.8°C | 39.6°C | 10.4°C | 3 mm | 56% | 4.5 m/s | 7.8 |
| 1990 | 27.9°C | 21.0°C | 14.2°C | 37.5°C | 9.6°C | 59 mm | 56% | 4.4 m/s | 7.6 |
| 1989 | 29.5°C | 22.2°C | 14.9°C | 40.7°C | 9.6°C | 12 mm | 51% | 4.1 m/s | 7.7 |
| 1988 | 27.6°C | 21.4°C | 15.2°C | 38.6°C | 10.5°C | 23 mm | 58% | 4.4 m/s | 7.7 |
| 1987 | 28.0°C | 21.2°C | 14.5°C | 40.3°C | 9.3°C | 19 mm | 51% | 4.5 m/s | 7.8 |
| 1986 | 25.8°C | 19.5°C | 13.2°C | 39.1°C | 10.0°C | 11 mm | 55% | 4.7 m/s | 7.7 |
| 1985 | 26.0°C | 19.4°C | 12.8°C | 37.7°C | 10.9°C | 19 mm | 56% | 4.7 m/s | 7.5 |
| 1984 | 29.2°C | 21.8°C | 14.5°C | 40.1°C | 10.7°C | 10 mm | 48% | 4.2 m/s | 7.6 |
| 1983 | 29.5°C | 22.5°C | 15.6°C | 40.5°C | 11.0°C | 26 mm | 51% | 3.9 m/s | — |
| 1982 | 29.3°C | 22.2°C | 15.1°C | 38.6°C | 10.5°C | 7 mm | 49% | 4.1 m/s | — |
| 1981 | 28.5°C | 21.3°C | 14.2°C | 41.4°C | 10.6°C | 3 mm | 51% | 4.5 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 28.5°C with lows near 14.9°C (mean 21.7°C), based on 45 years of NASA POWER data.
December averages 20 mm of rainfall in Cowell, about average for rainfall. The wettest on record was 104 mm in 1992.
The hottest December reached 45.7°C in 2019. The coldest dipped to 9°C in 1996.
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 28.5°C to 28.7°C and overnight lows from 14.4°C to 15.1°C over the same span.
December is one of the warmer months of the year in Cowell and about average for rainfall, so plan for around 28.5°C daytime highs and 14.9°C at night.
Not quite — December is the 10th coolest month in Cowell, averaging 21.7°C.
For December in Cowell, pack light layers you can adjust through the day, with typical highs of 28.5°C and lows of 14.9°C.
Relative humidity in December averages 53% — relatively dry.
Average wind speed in December is 4.3 m/s. The windiest December on record averaged 4.8 m/s (2002).
The wettest December on record was 1992 with 104 mm. On average, December sees 20 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 Cowell 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.
