December is one of the warmer months of the year in Newman, with average highs near 39.7°C and lows around 24°C (mean 31.9°C). It is a relatively wet time of year, averaging 39 mm of rainfall and 27% relative humidity across the period.
December is one of the warmer months of the year in Newman. Across 45 years of records, the warmest December in Newman was 2019 — when the month averaged 34.4°C — while the coldest was 1998 at 28.6°C. Typical December days reach 39.7°C with nights near 24°C. The long-term trend is warming, about 0.3°C per decade.
December is a relatively wet time of year in Newman, averaging 39 mm of rainfall. The wettest December on record was 1998 with 252 mm, while the driest was 2021 at 1 mm.
Relative humidity in Newman during December averages 27%. The most humid December was 1998 at 49%, and the least humid was 1986 at 14%.
December receives about 8.1 kWh/m²/day of solar energy in Newman. The sunniest December was 1992 at 8.8 kWh/m²/day, and the cloudiest was 2012 at 6.8.
Average wind speed in Newman during December is 3.5 m/s. The windiest Decembers were 1988 and 2003 at 4 m/s, while the calmest were 2012 and 2024 at 2.9 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 31.7°C | 31.1°C | 31.8°C | 32.2°C | 32.6°C | +0.9°C |
| Avg High | 39.8°C | 38.9°C | 39.7°C | 40.0°C | 40.4°C | +0.6°C |
| Avg Low | 23.5°C | 23.4°C | 23.9°C | 24.4°C | 24.8°C | +1.3°C |
| Avg Rain | 28 mm | 62 mm | 34 mm | 34 mm | 33 mm | +5 mm |
December temperatures in Newman have risen by about 1.2°C between 1981–1985 and 2021–2025.
December has ranged from a record low of 14°C (1990) to a record high of 47.4°C (1990).
Rainfall in December is a relatively wet time of year, averaging 39 mm, with a wettest year of 252 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
A quieter season to visit Newman
If your dates are flexible, the more temperate months of September and May tend to be the most comfortable for visiting Newman. That said, December — with days averaging 39.7°C and nights around 24°C (mean 31.9°C) and moderate rainfall (39 mm) — can still be rewarding for travellers who don't mind the warmth, and often means fewer crowds.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 41.1°C | 33.3°C | 25.4°C | 44.5°C | 19.4°C | 33 mm | 23% | 3.3 m/s | — |
| 2024 | 38.3°C | 30.8°C | 23.3°C | 43.5°C | 19.2°C | 112 mm | 41% | 2.9 m/s | 8.2 |
| 2023 | 42.3°C | 33.8°C | 25.3°C | 46.4°C | 16.6°C | 5 mm | 17% | 3.3 m/s | 8.5 |
| 2022 | 40.1°C | 32.7°C | 25.4°C | 44.0°C | 22.4°C | 14 mm | 25% | 3.6 m/s | 7.7 |
| 2021 | 42.7°C | 34.1°C | 25.6°C | 44.7°C | 23.2°C | 1 mm | 16% | 3.5 m/s | 8.6 |
| 2020 | 38.1°C | 31.1°C | 24.1°C | 42.2°C | 19.1°C | 31 mm | 34% | 3.5 m/s | 7.6 |
| 2019 🔥 | 42.2°C | 34.4°C | 26.6°C | 46.9°C | 19.6°C | 7 mm | 20% | 3.4 m/s | 7.6 |
| 2018 | 42.3°C | 33.8°C | 25.3°C | 47.1°C | 18.1°C | 4 mm | 19% | 3.9 m/s | 8.5 |
| 2017 | 39.9°C | 32.2°C | 24.5°C | 44.1°C | 19.2°C | 5 mm | 24% | 3.6 m/s | 7.4 |
| 2016 | 39.2°C | 32.0°C | 24.8°C | 42.6°C | 18.5°C | 23 mm | 31% | 3.4 m/s | 7.7 |
| 2015 | 42.0°C | 33.4°C | 24.8°C | 45.1°C | 18.4°C | 5 mm | 18% | 3.3 m/s | 8.4 |
| 2014 | 41.3°C | 32.8°C | 24.3°C | 44.6°C | 19.3°C | 11 mm | 23% | 3.4 m/s | 8.6 |
| 2013 | 37.6°C | 30.3°C | 23.0°C | 43.1°C | 18.5°C | 93 mm | 38% | 3.7 m/s | 7.4 |
| 2012 | 36.7°C | 30.1°C | 23.6°C | 44.1°C | 20.1°C | 102 mm | 44% | 2.9 m/s | 6.8 |
| 2011 | 39.6°C | 31.7°C | 23.7°C | 45.3°C | 19.0°C | 9 mm | 30% | 3.5 m/s | 8.1 |
| 2010 | 38.9°C | 31.1°C | 23.3°C | 44.0°C | 19.5°C | 80 mm | 33% | 3.4 m/s | 7.9 |
| 2009 | 40.4°C | 32.1°C | 23.9°C | 44.8°C | 18.8°C | 12 mm | 24% | 3.7 m/s | 8.3 |
| 2008 | 38.6°C | 30.9°C | 23.2°C | 43.9°C | 16.9°C | 47 mm | 33% | 3.6 m/s | 7.9 |
| 2007 | 38.8°C | 30.6°C | 22.4°C | 41.9°C | 18.3°C | 40 mm | 26% | 3.8 m/s | 8.2 |
| 2006 | 38.6°C | 30.9°C | 23.2°C | 42.8°C | 17.5°C | 38 mm | 28% | 3.5 m/s | 7.8 |
| 2005 | 40.3°C | 32.3°C | 24.4°C | 44.6°C | 19.8°C | 54 mm | 24% | 3.6 m/s | 8.1 |
| 2004 | 40.2°C | 32.3°C | 24.4°C | 44.5°C | 20.6°C | 60 mm | 22% | 3.4 m/s | 7.8 |
| 2003 | 41.5°C | 32.9°C | 24.2°C | 44.7°C | 20.4°C | 9 mm | 19% | 4 m/s | 8.7 |
| 2002 | 39.7°C | 32.2°C | 24.7°C | 44.9°C | 20.6°C | 29 mm | 27% | 3.4 m/s | 7.9 |
| 2001 | 40.0°C | 31.8°C | 23.7°C | 44.1°C | 18.2°C | 1 mm | 24% | 3.6 m/s | 8.4 |
| 2000 | 39.3°C | 32.2°C | 25.0°C | 42.2°C | 21.2°C | 46 mm | 30% | 3.7 m/s | 8.4 |
| 1999 | 36.0°C | 29.2°C | 22.4°C | 42.4°C | 15.2°C | 163 mm | 43% | 3.6 m/s | 7.3 |
| 1998 ❄️ 🌧️ | 35.2°C | 28.6°C | 21.9°C | 42.0°C | 14.4°C | 252 mm | 49% | 3.8 m/s | 7.5 |
| 1997 | 42.1°C | 33.7°C | 25.3°C | 46.1°C | 18.9°C | 3 mm | 21% | 3.5 m/s | 8.6 |
| 1996 | 38.1°C | 30.8°C | 23.5°C | 43.3°C | 20.3°C | 45 mm | 32% | 3.9 m/s | 7.9 |
| 1995 | 37.4°C | 30.0°C | 22.6°C | 44.4°C | 17.4°C | 67 mm | 39% | 3.4 m/s | 7.8 |
| 1994 | 38.8°C | 31.3°C | 23.9°C | 43.8°C | 19.3°C | 58 mm | 31% | 3.4 m/s | 7.7 |
| 1993 | 39.6°C | 31.8°C | 24.1°C | 43.6°C | 19.9°C | 19 mm | 29% | 3.6 m/s | 7.9 |
| 1992 | 39.9°C | 31.1°C | 22.3°C | 45.5°C | 18.0°C | 5 mm | 18% | 3.7 m/s | 8.8 |
| 1991 | 40.0°C | 31.9°C | 23.9°C | 43.1°C | 18.6°C | 3 mm | 18% | 3.7 m/s | 7.9 |
| 1990 | 41.5°C | 32.8°C | 24.1°C | 47.4°C | 14.0°C | 10 mm | 17% | 3.9 m/s | 8.3 |
| 1989 | 41.3°C | 33.2°C | 25.1°C | 44.0°C | 21.4°C | 5 mm | 19% | 3.5 m/s | 8.1 |
| 1988 | 36.7°C | 29.2°C | 21.7°C | 42.6°C | 16.3°C | 57 mm | 34% | 4 m/s | 8.4 |
| 1987 | 39.6°C | 31.6°C | 23.6°C | 43.3°C | 14.6°C | 32 mm | 24% | 3.5 m/s | 8.5 |
| 1986 | 41.5°C | 32.6°C | 23.7°C | 46.1°C | 19.9°C | 2 mm | 14% | 3.8 m/s | 8.7 |
| 1985 | 40.7°C | 31.7°C | 22.7°C | 43.8°C | 16.9°C | 10 mm | 16% | 3.6 m/s | 8.7 |
| 1984 | 38.9°C | 30.9°C | 22.8°C | 41.8°C | 19.0°C | 58 mm | 31% | 3.8 m/s | 7.8 |
| 1983 | 38.6°C | 31.2°C | 23.8°C | 42.7°C | 19.3°C | 49 mm | 33% | 3.3 m/s | — |
| 1982 | 39.8°C | 31.9°C | 23.9°C | 43.7°C | 21.2°C | 24 mm | 27% | 3.2 m/s | — |
| 1981 | 41.2°C | 32.8°C | 24.4°C | 44.9°C | 19.8°C | 12 mm | 21% | 3.5 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 39.7°C with lows near 24°C (mean 31.9°C), based on 45 years of NASA POWER data.
December averages 39 mm of rainfall in Newman, a relatively wet time of year. The wettest on record was 252 mm in 1998.
The hottest December reached 47.4°C in 1990. The coldest dipped to 14°C in 1990.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 1.2°C. Daytime highs moved from 39.8°C to 40.9°C and overnight lows from 23.5°C to 25°C over the same span.
December is one of the warmer months of the year in Newman and a relatively wet time of year, so plan for around 39.7°C daytime highs and 24°C at night.
Not quite — December is the 11th coolest month in Newman, averaging 31.9°C.
For December in Newman, pack light, breathable clothing and sun protection, with typical highs of 39.7°C and lows of 24°C.
Relative humidity in December averages 27% — relatively dry.
Average wind speed in December is 3.5 m/s. The windiest December on record averaged 4 m/s (1988).
The wettest December on record was 1998 with 252 mm. On average, December sees 39 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 Newman 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.
