December is one of the warmer months of the year in Narrabri, with average highs near 32.1°C and lows around 16.9°C (mean 24.5°C). It is a relatively wet time of year, averaging 81 mm of rainfall and 51% relative humidity across the period.
December is one of the warmer months of the year in Narrabri. Across 45 years of records, the warmest December in Narrabri was 1990 — when the month averaged 28.2°C — while the coldest was 2011 at 19.7°C. Typical December days reach 32.1°C with nights near 16.9°C. The long-term trend is warming, about 0.2°C per decade.
December is a relatively wet time of year in Narrabri, averaging 81 mm of rainfall. The wettest December on record was 2004 with 221 mm, while the driest was 2019 at 6 mm.
Relative humidity in Narrabri during December averages 51%. The most humid December was 2011 at 73%, and the least humid was 2019 at 31%.
December receives about 7.7 kWh/m²/day of solar energy in Narrabri. The sunniest Decembers were 1986, 1994 and 2005 at 8.4 kWh/m²/day, and the cloudiest was 2010 at 6.5.
Average wind speed in Narrabri during December is 2.6 m/s. The windiest December was 1988 at 3.1 m/s, while the calmest was 2000 at 2.1 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 24.5°C | 24.1°C | 24.6°C | 24.9°C | 24.6°C | +0.1°C |
| Avg High | 32.4°C | 31.7°C | 32.0°C | 32.4°C | 32.1°C | -0.3°C |
| Avg Low | 16.5°C | 16.6°C | 17.1°C | 17.4°C | 17.1°C | +0.6°C |
| Avg Rain | 71 mm | 86 mm | 92 mm | 76 mm | 77 mm | +6 mm |
December temperatures in Narrabri have stayed relatively stable across the record.
December has ranged from a record low of 7.2°C (1987) to a record high of 44.6°C (1990).
Rainfall in December is a relatively wet time of year, averaging 81 mm, with a wettest year of 221 mm.
A good time to visit Narrabri
December is a good time to visit Narrabri, with days averaging 32.1°C and nights around 16.9°C (mean 24.5°C, warmer than Narrabri's yearly average) and higher rainfall. November and March are marginally more temperate, but December still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 33.6°C | 25.3°C | 17.0°C | 40.2°C | 8.9°C | 45 mm | 45% | 2.3 m/s | — |
| 2024 | 34.5°C | 26.6°C | 18.7°C | 39.2°C | 12.3°C | 30 mm | 48% | 2.4 m/s | 8.2 |
| 2023 | 33.8°C | 26.4°C | 18.9°C | 40.1°C | 14.9°C | 104 mm | 53% | 2.3 m/s | 7.9 |
| 2022 | 29.8°C | 21.7°C | 13.6°C | 36.2°C | 8.4°C | 36 mm | 51% | 2.6 m/s | 7.8 |
| 2021 | 29.9°C | 23.0°C | 16.2°C | 35.5°C | 8.7°C | 67 mm | 63% | 2.3 m/s | 7.7 |
| 2020 | 30.9°C | 24.4°C | 17.9°C | 43.1°C | 10.5°C | 180 mm | 60% | 2.8 m/s | 6.9 |
| 2019 | 36.7°C | 27.8°C | 18.9°C | 42.0°C | 10.4°C | 6 mm | 31% | 2.7 m/s | 8.3 |
| 2018 | 34.4°C | 26.1°C | 17.8°C | 39.9°C | 12.5°C | 47 mm | 45% | 2.5 m/s | 8.2 |
| 2017 | 34.1°C | 26.4°C | 18.6°C | 41.2°C | 11.0°C | 58 mm | 48% | 2.6 m/s | 7.8 |
| 2016 | 34.0°C | 26.5°C | 19.0°C | 40.5°C | 10.6°C | 73 mm | 50% | 2.6 m/s | 7.6 |
| 2015 | 32.2°C | 24.6°C | 17.1°C | 36.8°C | 11.4°C | 86 mm | 53% | 2.7 m/s | 7.8 |
| 2014 | 32.2°C | 25.1°C | 18.0°C | 38.3°C | 12.1°C | 112 mm | 54% | 2.8 m/s | 7.1 |
| 2013 | 33.8°C | 25.1°C | 16.4°C | 41.2°C | 7.8°C | 28 mm | 43% | 2.3 m/s | 8.1 |
| 2012 | 34.1°C | 26.4°C | 18.7°C | 41.4°C | 11.6°C | 75 mm | 45% | 2.5 m/s | 7.8 |
| 2011 ❄️ | 25.5°C | 19.7°C | 14.0°C | 29.8°C | 8.6°C | 122 mm | 73% | 2.2 m/s | 7 |
| 2010 | 27.3°C | 21.6°C | 15.9°C | 34.3°C | 8.9°C | 148 mm | 72% | 2.3 m/s | 6.5 |
| 2009 | 33.2°C | 26.1°C | 18.9°C | 41.2°C | 12.4°C | 137 mm | 45% | 2.7 m/s | 6.8 |
| 2008 | 30.7°C | 23.7°C | 16.6°C | 34.8°C | 10.6°C | 99 mm | 57% | 2.5 m/s | 7.4 |
| 2007 | 29.2°C | 23.0°C | 16.8°C | 34.2°C | 10.0°C | 149 mm | 67% | 2.5 m/s | 6.6 |
| 2006 | 32.6°C | 24.9°C | 17.2°C | 36.7°C | 10.9°C | 31 mm | 43% | 2.6 m/s | 7 |
| 2005 | 34.3°C | 25.7°C | 17.1°C | 41.1°C | 11.1°C | 76 mm | 45% | 2.8 m/s | 8.4 |
| 2004 🌧️ | 29.3°C | 22.8°C | 16.2°C | 39.5°C | 7.5°C | 221 mm | 63% | 2.7 m/s | 7.8 |
| 2003 | 34.2°C | 26.2°C | 18.3°C | 41.3°C | 10.1°C | 51 mm | 49% | 2.6 m/s | 7.8 |
| 2002 | 32.8°C | 24.6°C | 16.5°C | 38.9°C | 9.1°C | 70 mm | 47% | 2.5 m/s | 8.1 |
| 2001 | 32.5°C | 24.6°C | 16.6°C | 39.8°C | 11.4°C | 42 mm | 47% | 2.5 m/s | 7.5 |
| 2000 | 31.6°C | 24.2°C | 16.7°C | 36.2°C | 11.6°C | 42 mm | 55% | 2.1 m/s | 8 |
| 1999 | 28.9°C | 22.1°C | 15.3°C | 33.9°C | 10.3°C | 61 mm | 58% | 2.2 m/s | 7.2 |
| 1998 | 32.8°C | 24.9°C | 17.1°C | 37.2°C | 10.8°C | 35 mm | 49% | 2.2 m/s | 8 |
| 1997 | 33.9°C | 26.4°C | 18.9°C | 38.4°C | 13.9°C | 122 mm | 52% | 2.5 m/s | 7.8 |
| 1996 | 30.0°C | 22.8°C | 15.7°C | 37.0°C | 9.8°C | 165 mm | 58% | 2.4 m/s | 7.5 |
| 1995 | 29.8°C | 22.1°C | 14.5°C | 36.1°C | 7.9°C | 71 mm | 56% | 2.7 m/s | 7.7 |
| 1994 | 34.5°C | 25.9°C | 17.3°C | 41.3°C | 11.4°C | 49 mm | 44% | 2.7 m/s | 8.4 |
| 1993 | 30.6°C | 23.0°C | 15.5°C | 39.3°C | 7.6°C | 76 mm | 52% | 2.8 m/s | 7.5 |
| 1992 | 29.7°C | 22.8°C | 15.9°C | 35.7°C | 8.5°C | 84 mm | 59% | 2.6 m/s | 7.1 |
| 1991 | 30.1°C | 22.8°C | 15.6°C | 37.7°C | 10.6°C | 157 mm | 56% | 2.6 m/s | 7.6 |
| 1990 🔥 | 36.6°C | 28.2°C | 19.8°C | 44.6°C | 11.0°C | 41 mm | 35% | 2.8 m/s | 8.3 |
| 1989 | 32.6°C | 24.4°C | 16.2°C | 37.8°C | 11.3°C | 55 mm | 50% | 2.8 m/s | 8.1 |
| 1988 | 32.9°C | 25.4°C | 18.0°C | 38.9°C | 10.9°C | 120 mm | 52% | 3.1 m/s | 7.6 |
| 1987 | 32.2°C | 24.4°C | 16.6°C | 38.3°C | 7.2°C | 75 mm | 49% | 2.9 m/s | 7.9 |
| 1986 | 32.0°C | 23.5°C | 15.0°C | 39.9°C | 7.8°C | 25 mm | 41% | 2.7 m/s | 8.4 |
| 1985 | 30.7°C | 23.2°C | 15.6°C | 38.1°C | 10.4°C | 120 mm | 52% | 2.6 m/s | 7.8 |
| 1984 | 32.5°C | 24.2°C | 15.8°C | 38.1°C | 10.2°C | 51 mm | 42% | 2.8 m/s | 7.9 |
| 1983 | 30.3°C | 23.0°C | 15.6°C | 37.2°C | 8.8°C | 74 mm | 57% | 2.4 m/s | — |
| 1982 | 33.8°C | 26.1°C | 18.3°C | 41.4°C | 11.4°C | 73 mm | 43% | 2.7 m/s | — |
| 1981 | 34.4°C | 25.9°C | 17.4°C | 42.3°C | 12.0°C | 46 mm | 44% | 2.7 m/s | — |
Actual recorded December data for each year, 1981–2025 — sourced from NASA POWER.
The average high in December is around 32.1°C with lows near 16.9°C (mean 24.5°C), based on 45 years of NASA POWER data.
December averages 81 mm of rainfall in Narrabri, a relatively wet time of year. The wettest on record was 221 mm in 2004.
The hottest December reached 44.6°C in 1990. The coldest dipped to 7.2°C in 1987.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average December temperatures have risen by about 0.1°C. Daytime highs moved from 32.3°C to 32.3°C and overnight lows from 16.5°C to 16.9°C over the same span.
December is one of the warmer months of the year in Narrabri and a relatively wet time of year, so plan for around 32.1°C daytime highs and 16.9°C at night.
Not quite — December is the 10th coolest month in Narrabri, averaging 24.5°C.
For December in Narrabri, pack light, breathable clothing and sun protection, with typical highs of 32.1°C and lows of 16.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in December averages 51% — relatively dry.
Average wind speed in December is 2.6 m/s. The windiest December on record averaged 3.1 m/s (1988).
The wettest December on record was 2004 with 221 mm. On average, December sees 81 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 Narrabri 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.
