January is one of the warmer months of the year in Gunnedah, with average highs near 33.9°C and lows around 18.7°C (mean 26.3°C). It is a relatively wet time of year, averaging 80 mm of rainfall and 52% relative humidity across the period.
January is one of the warmer months of the year in Gunnedah. Across 45 years of records, the warmest January in Gunnedah was 2019 — when the month averaged 31°C — while the coldest was 1984 at 22.4°C. Typical January days reach 33.9°C with nights near 18.7°C. The long-term trend is warming, about 0.3°C per decade.
January is a relatively wet time of year in Gunnedah, averaging 80 mm of rainfall. The wettest January on record was 1984 with 251 mm, while the driest was 2014 at 10 mm.
Relative humidity in Gunnedah during January averages 52%. The most humid January was 1996 at 68%, and the least humid was 1985 at 32%.
January receives about 7.3 kWh/m²/day of solar energy in Gunnedah. The sunniest January was 1985 at 8.1 kWh/m²/day, and the cloudiest was 1984 at 6.1.
Average wind speed in Gunnedah during January is 2.3 m/s. The windiest January was 2000 at 2.7 m/s, while the calmest was 2010 at 1.8 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 25.7°C | 25.8°C | 26.5°C | 26.8°C | 26.6°C | +0.9°C |
| Avg High | 33.7°C | 33.2°C | 34.3°C | 34.2°C | 33.8°C | +0.1°C |
| Avg Low | 17.8°C | 18.4°C | 18.7°C | 19.4°C | 19.4°C | +1.6°C |
| Avg Rain | 85 mm | 97 mm | 58 mm | 82 mm | 79 mm | -6 mm |
January temperatures in Gunnedah have stayed relatively stable across the record.
January has ranged from a record low of 9°C (1984) to a record high of 46.1°C (2014).
Rainfall in January is a relatively wet time of year, averaging 80 mm, with a wettest year of 251 mm.
Daytime highs and overnight lows have shifted differently — highs rose about 0.2°C per decade while lows rose 0.5°C per decade, narrowing the gap between day and night.
A good time to visit Gunnedah
January is a good time to visit Gunnedah, with days averaging 33.9°C and nights around 18.7°C (mean 26.3°C, warmer than Gunnedah's yearly average) and higher rainfall. November and March are marginally more temperate, but January still suits most travellers.
| Year | Avg High | Avg Temp | Avg Low | Hottest Day | Coldest Day | Rainfall | Humidity | Wind | Solar |
|---|---|---|---|---|---|---|---|---|---|
| 2025 | 33.8°C | 26.4°C | 19.0°C | 40.6°C | 12.0°C | 88 mm | 56% | 2.5 m/s | 7.4 |
| 2024 | 35.1°C | 27.7°C | 20.4°C | 40.1°C | 13.2°C | 63 mm | 57% | 2.2 m/s | 7 |
| 2023 | 34.3°C | 26.6°C | 18.9°C | 39.0°C | 13.8°C | 68 mm | 49% | 2.3 m/s | 7.5 |
| 2022 | 32.3°C | 25.8°C | 19.3°C | 36.1°C | 13.9°C | 102 mm | 63% | 2.2 m/s | 7 |
| 2021 | 31.1°C | 24.0°C | 17.0°C | 35.5°C | 11.8°C | 74 mm | 61% | 2.2 m/s | 7.3 |
| 2020 | 36.5°C | 29.2°C | 21.9°C | 42.8°C | 16.5°C | 79 mm | 49% | 2.2 m/s | 7.1 |
| 2019 🔥 | 38.6°C | 31.0°C | 23.5°C | 44.6°C | 20.7°C | 42 mm | 41% | 2 m/s | 7.7 |
| 2018 | 36.1°C | 28.0°C | 19.9°C | 42.7°C | 12.8°C | 37 mm | 43% | 2.1 m/s | 7.9 |
| 2017 | 36.0°C | 28.6°C | 21.2°C | 42.0°C | 16.6°C | 100 mm | 53% | 2.3 m/s | 7.5 |
| 2016 | 31.8°C | 24.8°C | 17.8°C | 39.0°C | 12.5°C | 117 mm | 59% | 2.4 m/s | 6.7 |
| 2015 | 32.0°C | 25.1°C | 18.1°C | 36.9°C | 12.2°C | 92 mm | 59% | 2.2 m/s | 6.8 |
| 2014 | 36.6°C | 28.0°C | 19.4°C | 46.1°C | 15.2°C | 10 mm | 37% | 2.4 m/s | 7.9 |
| 2013 | 35.6°C | 27.8°C | 20.0°C | 43.9°C | 15.5°C | 135 mm | 51% | 2.4 m/s | 7.4 |
| 2012 | 30.5°C | 23.6°C | 16.8°C | 35.4°C | 9.5°C | 125 mm | 62% | 2.5 m/s | 6.5 |
| 2011 | 33.4°C | 26.0°C | 18.6°C | 41.9°C | 15.9°C | 38 mm | 59% | 2.2 m/s | 7.3 |
| 2010 | 31.8°C | 25.2°C | 18.5°C | 37.3°C | 9.2°C | 125 mm | 63% | 1.8 m/s | 7.6 |
| 2009 | 34.1°C | 26.6°C | 19.1°C | 39.4°C | 13.8°C | 33 mm | 52% | 2 m/s | 7.3 |
| 2008 | 31.4°C | 24.4°C | 17.4°C | 35.8°C | 13.6°C | 86 mm | 64% | 2.4 m/s | 6.8 |
| 2007 | 34.9°C | 27.2°C | 19.6°C | 41.0°C | 13.3°C | 37 mm | 45% | 2.2 m/s | 7.3 |
| 2006 | 36.2°C | 28.7°C | 21.3°C | 41.2°C | 16.9°C | 53 mm | 51% | 2.2 m/s | 7.1 |
| 2005 | 33.8°C | 25.7°C | 17.5°C | 39.8°C | 12.3°C | 59 mm | 54% | 2.4 m/s | 7.6 |
| 2004 | 33.6°C | 26.6°C | 19.7°C | 43.7°C | 13.3°C | 161 mm | 52% | 2.2 m/s | 7.1 |
| 2003 | 36.4°C | 27.4°C | 18.5°C | 42.4°C | 13.2°C | 19 mm | 41% | 2.6 m/s | 8 |
| 2002 | 34.6°C | 26.3°C | 17.9°C | 38.6°C | 13.0°C | 33 mm | 41% | 2.4 m/s | 7.8 |
| 2001 | 36.5°C | 28.2°C | 19.9°C | 43.3°C | 13.4°C | 65 mm | 44% | 2.3 m/s | 7.5 |
| 2000 | 31.9°C | 24.2°C | 16.5°C | 41.4°C | 12.6°C | 34 mm | 50% | 2.7 m/s | 7.5 |
| 1999 | 34.6°C | 27.3°C | 20.0°C | 39.6°C | 17.2°C | 63 mm | 52% | 2.1 m/s | 7.2 |
| 1998 | 34.8°C | 27.5°C | 20.2°C | 40.6°C | 14.0°C | 46 mm | 50% | 2 m/s | 7.3 |
| 1997 | 30.4°C | 23.2°C | 16.0°C | 37.1°C | 10.5°C | 136 mm | 56% | 2.3 m/s | 7.1 |
| 1996 | 30.2°C | 23.9°C | 17.6°C | 38.3°C | 15.3°C | 198 mm | 68% | 2.2 m/s | 6.6 |
| 1995 | 30.0°C | 23.4°C | 16.9°C | 36.0°C | 11.4°C | 160 mm | 62% | 2.4 m/s | 6.8 |
| 1994 | 35.7°C | 27.0°C | 18.4°C | 41.9°C | 14.3°C | 29 mm | 41% | 2.5 m/s | 8 |
| 1993 | 34.7°C | 27.4°C | 20.2°C | 38.9°C | 15.1°C | 62 mm | 54% | 2 m/s | 7.4 |
| 1992 | 33.7°C | 25.4°C | 17.0°C | 39.0°C | 12.2°C | 28 mm | 47% | 2.1 m/s | 7.9 |
| 1991 | 32.2°C | 25.3°C | 18.4°C | 37.5°C | 11.4°C | 181 mm | 59% | 1.9 m/s | 7.1 |
| 1990 | 35.4°C | 27.3°C | 19.2°C | 44.5°C | 11.2°C | 64 mm | 48% | 2.3 m/s | 7.4 |
| 1989 | 31.5°C | 23.8°C | 16.0°C | 37.5°C | 11.8°C | 38 mm | 55% | 2.6 m/s | 7.6 |
| 1988 | 34.1°C | 26.0°C | 17.9°C | 39.6°C | 11.6°C | 115 mm | 55% | 2.1 m/s | 7.8 |
| 1987 | 33.8°C | 26.0°C | 18.2°C | 40.4°C | 11.8°C | 120 mm | 54% | 2 m/s | 7 |
| 1986 | 32.5°C | 24.2°C | 15.9°C | 39.1°C | 10.9°C | 60 mm | 49% | 2.2 m/s | 7.8 |
| 1985 | 36.8°C | 27.5°C | 18.2°C | 40.3°C | 13.7°C | 21 mm | 32% | 2.4 m/s | 8.1 |
| 1984 ❄️ 🌧️ | 28.7°C | 22.4°C | 16.1°C | 33.9°C | 9.0°C | 251 mm | 68% | 2.4 m/s | 6.1 |
| 1983 | 33.3°C | 25.1°C | 16.9°C | 37.7°C | 9.5°C | 81 mm | 50% | 2.1 m/s | — |
| 1982 | 35.1°C | 27.2°C | 19.4°C | 41.7°C | 13.7°C | 70 mm | 49% | 2.3 m/s | — |
| 1981 | 37.1°C | 29.2°C | 21.2°C | 41.9°C | 15.8°C | 13 mm | 40% | 2.1 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 33.9°C with lows near 18.7°C (mean 26.3°C), based on 45 years of NASA POWER data.
January averages 80 mm of rainfall in Gunnedah, a relatively wet time of year. The wettest on record was 251 mm in 1984.
The hottest January reached 46.1°C in 2014. The coldest dipped to 9°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have fallen by about 0.2°C — but days and nights have moved in opposite directions. Overnight lows rose from 18.4°C to 18.9°C while daytime highs eased from 34.2°C to 33.3°C, narrowing the gap between day and night.
January is one of the warmer months of the year in Gunnedah and a relatively wet time of year, so plan for around 33.9°C daytime highs and 18.7°C at night.
Not quite — January is the 12th coolest month in Gunnedah, averaging 26.3°C.
For January in Gunnedah, pack light, breathable clothing and sun protection, with typical highs of 33.9°C and lows of 18.7°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 52% — relatively dry.
Average wind speed in January is 2.3 m/s. The windiest January on record averaged 2.7 m/s (2000).
The wettest January on record was 1984 with 251 mm. On average, January sees 80 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 Gunnedah behaves each January, 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 January specifically, along with year-by-year records and how the month has changed over the decades.
