December is one of the warmer months of the year in Longreach, with average highs near 38°C and lows around 23.4°C (mean 30.7°C). It is a relatively wet time of year, averaging 49 mm of rainfall and 39% relative humidity across the period.
December is one of the warmer months of the year in Longreach. Across 45 years of records, the warmest December in Longreach was 2005 — when the month averaged 33°C — while the coldest were 1999 and 2010 at 26.6°C. Typical December days reach 38°C with nights near 23.4°C. The long-term trend is warming, about 0.2°C per decade.
December is a relatively wet time of year in Longreach, averaging 49 mm of rainfall. The wettest December on record was 2010 with 168 mm, while the driest was 2019 at 0 mm.
Relative humidity in Longreach during December averages 39%. The most humid December was 2010 at 69%, and the least humid was 2019 at 22%.
December receives about 7.7 kWh/m²/day of solar energy in Longreach. The sunniest December was 2019 at 8.6 kWh/m²/day, and the cloudiest was 2010 at 6.7.
Average wind speed in Longreach during December is 3.6 m/s. The windiest Decembers were 2015 and 2018 at 4.3 m/s, while the calmest was 1997 at 2.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 30.7°C | 30.1°C | 30.5°C | 30.9°C | 31.4°C | +0.7°C |
| Avg High | 38.4°C | 37.4°C | 37.7°C | 38.0°C | 38.5°C | +0.1°C |
| Avg Low | 22.9°C | 22.8°C | 23.3°C | 23.8°C | 24.3°C | +1.4°C |
| Avg Rain | 39 mm | 54 mm | 75 mm | 40 mm | 30 mm | -9 mm |
December temperatures in Longreach have stayed relatively stable across the record.
December has ranged from a record low of 13.7°C (1986) to a record high of 46.4°C (2013).
Rainfall in December is a relatively wet time of year, averaging 49 mm, with a wettest year of 168 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.1°C per decade while lows rose 0.4°C per decade, narrowing the gap between day and night.
A quieter season to visit Longreach
If your dates are flexible, the more temperate months of September and May tend to be the most comfortable for visiting Longreach. That said, December — with days averaging 38°C and nights around 23.4°C (mean 30.7°C) and moderate rainfall (49 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 | 37.1°C | 30.8°C | 24.4°C | 42.9°C | 17.7°C | 33 mm | 40% | 3.6 m/s | — |
| 2024 | 39.6°C | 32.4°C | 25.1°C | 44.3°C | 21.9°C | 36 mm | 41% | 3.6 m/s | 7.6 |
| 2023 | 40.3°C | 32.6°C | 24.8°C | 46.4°C | 18.5°C | 21 mm | 33% | 3.7 m/s | 8.1 |
| 2022 | 36.6°C | 29.3°C | 22.1°C | 43.8°C | 19.1°C | 43 mm | 37% | 4 m/s | 7.7 |
| 2021 | 39.0°C | 31.7°C | 24.5°C | 43.3°C | 17.3°C | 8 mm | 33% | 3.6 m/s | 8 |
| 2020 | 38.5°C | 31.8°C | 25.1°C | 44.6°C | 19.2°C | 39 mm | 38% | 3.7 m/s | 7 |
| 2019 | 41.1°C | 32.9°C | 24.6°C | 45.2°C | 19.9°C | 0 mm | 22% | 3.8 m/s | 8.6 |
| 2018 | 39.3°C | 31.4°C | 23.6°C | 44.4°C | 15.6°C | 27 mm | 33% | 4.3 m/s | 8.4 |
| 2017 | 40.0°C | 32.4°C | 24.8°C | 45.5°C | 16.0°C | 10 mm | 27% | 3.9 m/s | 8.2 |
| 2016 | 38.8°C | 32.1°C | 25.4°C | 44.2°C | 21.7°C | 21 mm | 38% | 3.4 m/s | 7.2 |
| 2015 | 38.1°C | 31.8°C | 25.5°C | 41.4°C | 22.1°C | 12 mm | 37% | 4.3 m/s | 7.3 |
| 2014 | 38.0°C | 30.9°C | 23.7°C | 43.3°C | 19.3°C | 57 mm | 45% | 3.2 m/s | 7.4 |
| 2013 | 39.4°C | 31.7°C | 24.0°C | 46.4°C | 17.4°C | 13 mm | 30% | 3.8 m/s | 8.2 |
| 2012 | 38.2°C | 31.2°C | 24.2°C | 43.4°C | 18.8°C | 28 mm | 36% | 3.5 m/s | 7.7 |
| 2011 | 34.7°C | 28.0°C | 21.3°C | 40.1°C | 15.5°C | 68 mm | 54% | 3.3 m/s | 7 |
| 2010 🌧️ | 32.6°C | 26.6°C | 20.5°C | 37.6°C | 13.9°C | 168 mm | 69% | 3.1 m/s | 6.7 |
| 2009 | 37.9°C | 31.4°C | 24.8°C | 44.0°C | 18.7°C | 132 mm | 41% | 3.5 m/s | 7.2 |
| 2008 | 39.6°C | 31.9°C | 24.1°C | 42.8°C | 16.3°C | 23 mm | 36% | 3.2 m/s | 8 |
| 2007 | 35.3°C | 28.6°C | 21.9°C | 41.6°C | 16.6°C | 153 mm | 55% | 3.5 m/s | 7.5 |
| 2006 | 36.4°C | 29.8°C | 23.1°C | 44.9°C | 18.8°C | 76 mm | 42% | 4.1 m/s | 7.4 |
| 2005 🔥 | 40.8°C | 33.0°C | 25.1°C | 44.0°C | 16.8°C | 14 mm | 27% | 3.6 m/s | 7.8 |
| 2004 | 37.8°C | 30.3°C | 22.9°C | 41.4°C | 16.6°C | 64 mm | 42% | 3.1 m/s | 7.5 |
| 2003 | 38.4°C | 31.2°C | 23.9°C | 43.7°C | 19.1°C | 36 mm | 41% | 3.9 m/s | 7.5 |
| 2002 | 39.5°C | 31.6°C | 23.6°C | 44.3°C | 16.4°C | 10 mm | 24% | 4.1 m/s | 8.2 |
| 2001 | 38.5°C | 30.7°C | 22.9°C | 43.1°C | 19.1°C | 84 mm | 42% | 2.9 m/s | 7.9 |
| 2000 | 33.1°C | 26.8°C | 20.6°C | 36.6°C | 16.9°C | 160 mm | 61% | 3.4 m/s | 6.8 |
| 1999 ❄️ | 33.6°C | 26.6°C | 19.5°C | 38.1°C | 15.3°C | 65 mm | 55% | 3.8 m/s | 7.6 |
| 1998 | 37.7°C | 30.3°C | 22.9°C | 44.5°C | 16.8°C | 93 mm | 41% | 3.6 m/s | 7.5 |
| 1997 | 37.5°C | 31.5°C | 25.5°C | 45.1°C | 21.2°C | 85 mm | 51% | 2.8 m/s | 7.1 |
| 1996 | 38.0°C | 31.0°C | 24.0°C | 46.2°C | 17.1°C | 55 mm | 41% | 3.6 m/s | 7.6 |
| 1995 | 39.1°C | 31.3°C | 23.6°C | 45.3°C | 16.5°C | 38 mm | 30% | 4.2 m/s | 8 |
| 1994 | 38.4°C | 31.1°C | 23.8°C | 43.7°C | 18.6°C | 5 mm | 32% | 3.6 m/s | 8.3 |
| 1993 | 36.1°C | 28.5°C | 20.9°C | 41.1°C | 13.8°C | 90 mm | 44% | 3.8 m/s | 7.9 |
| 1992 | 36.5°C | 29.3°C | 22.0°C | 41.8°C | 17.2°C | 47 mm | 40% | 3.8 m/s | 7.5 |
| 1991 | 37.9°C | 29.8°C | 21.6°C | 43.7°C | 14.1°C | 38 mm | 33% | 3.1 m/s | 8.2 |
| 1990 | 39.3°C | 31.9°C | 24.6°C | 45.2°C | 19.1°C | 22 mm | 37% | 4.2 m/s | 8 |
| 1989 | 36.1°C | 28.8°C | 21.6°C | 41.2°C | 16.4°C | 31 mm | 48% | 3 m/s | 8.1 |
| 1988 | 37.4°C | 30.3°C | 23.2°C | 41.2°C | 17.4°C | 47 mm | 41% | 4 m/s | 7.9 |
| 1987 | 38.2°C | 31.2°C | 24.1°C | 42.4°C | 14.6°C | 15 mm | 33% | 3.8 m/s | 7.6 |
| 1986 | 38.4°C | 30.1°C | 21.7°C | 44.8°C | 13.7°C | 65 mm | 35% | 3.5 m/s | 8.1 |
| 1985 | 38.8°C | 30.5°C | 22.2°C | 45.0°C | 16.0°C | 40 mm | 35% | 3.2 m/s | 7.9 |
| 1984 | 39.1°C | 31.2°C | 23.3°C | 44.3°C | 17.8°C | 62 mm | 37% | 3.6 m/s | 7.6 |
| 1983 | 36.8°C | 29.3°C | 21.7°C | 41.5°C | 14.1°C | 47 mm | 39% | 4 m/s | — |
| 1982 | 40.0°C | 32.1°C | 24.2°C | 44.4°C | 16.9°C | 18 mm | 28% | 3.5 m/s | — |
| 1981 | 41.2°C | 32.8°C | 24.5°C | 45.2°C | 18.4°C | 26 mm | 31% | 3.6 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 38°C with lows near 23.4°C (mean 30.7°C), based on 45 years of NASA POWER data.
December averages 49 mm of rainfall in Longreach, a relatively wet time of year. The wettest on record was 168 mm in 2010.
The hottest December reached 46.4°C in 2013. The coldest dipped to 13.7°C in 1986.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 0.2°C — but days and nights have moved in opposite directions. Overnight lows rose from 23.2°C to 24.2°C while daytime highs eased from 39.2°C to 38.5°C, narrowing the gap between day and night.
December is one of the warmer months of the year in Longreach and a relatively wet time of year, so plan for around 38°C daytime highs and 23.4°C at night.
Not quite — December is the 11th coolest month in Longreach, averaging 30.7°C.
For December in Longreach, pack light, breathable clothing and sun protection, with typical highs of 38°C and lows of 23.4°C.
Relative humidity in December averages 39% — relatively dry.
Average wind speed in December is 3.6 m/s. The windiest December on record averaged 4.3 m/s (2015).
The wettest December on record was 2010 with 168 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 Longreach 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.
