January is one of the warmer months of the year in Muswellbrook, with average highs near 31.3°C and lows around 16.9°C (mean 24.1°C). It is a relatively wet time of year, averaging 88 mm of rainfall and 60% relative humidity across the period.
January is one of the warmer months of the year in Muswellbrook. Across 45 years of records, the warmest January in Muswellbrook was 2019 — when the month averaged 28.2°C — while the coldest was 1989 at 20.8°C. Typical January days reach 31.3°C with nights near 16.9°C. The long-term trend is warming, about 0.3°C per decade.
January is a relatively wet time of year in Muswellbrook, averaging 88 mm of rainfall. The wettest January on record was 2016 with 226 mm, while the driest was 2014 at 16 mm.
Relative humidity in Muswellbrook during January averages 60%. The most humid January was 2016 at 77%, and the least humid was 1985 at 42%.
January receives about 6.8 kWh/m²/day of solar energy in Muswellbrook. The sunniest January was 1985 at 7.8 kWh/m²/day, and the cloudiest was 1996 at 5.8.
Average wind speed in Muswellbrook during January is 0.9 m/s. The windiest Januarys were 2020, 2024 and 2025, among others at 1 m/s, while the calmest was 2019 at 0.7 m/s.
Ranked against the other 11 months using 1981–2025 averages.
| Metric | 1980s | 1990s | 2000s | 2010s | 2020s | Change |
|---|---|---|---|---|---|---|
| Avg Temp | 23.5°C | 23.5°C | 24.4°C | 24.8°C | 24.1°C | +0.6°C |
| Avg High | 30.9°C | 30.6°C | 32.0°C | 31.9°C | 30.8°C | -0.1°C |
| Avg Low | 16.2°C | 16.4°C | 16.9°C | 17.7°C | 17.4°C | +1.2°C |
| Avg Rain | 99 mm | 97 mm | 64 mm | 94 mm | 89 mm | -10 mm |
January temperatures in Muswellbrook have fallen by about 0.6°C between 1981–1985 and 2021–2025.
January has ranged from a record low of 9.3°C (1984) to a record high of 43.2°C (2001).
Rainfall in January is a relatively wet time of year, averaging 88 mm, with a wettest year of 226 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 good time to visit Muswellbrook
January is a good time to visit Muswellbrook, with days averaging 31.3°C and nights around 16.9°C (mean 24.1°C, warmer than Muswellbrook's yearly average) and higher rainfall. December and February 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 | 30.7°C | 23.8°C | 16.9°C | 39.3°C | 12.1°C | 116 mm | 65% | 1 m/s | 6.4 |
| 2024 | 31.9°C | 25.2°C | 18.5°C | 39.2°C | 13.0°C | 76 mm | 64% | 1 m/s | 6.4 |
| 2023 | 30.3°C | 23.2°C | 16.0°C | 36.4°C | 11.4°C | 91 mm | 64% | 0.9 m/s | 6.8 |
| 2022 | 28.8°C | 23.3°C | 17.7°C | 33.0°C | 13.8°C | 103 mm | 72% | 0.9 m/s | 6.1 |
| 2021 | 28.8°C | 22.4°C | 16.0°C | 37.1°C | 11.8°C | 87 mm | 65% | 0.9 m/s | 6.7 |
| 2020 | 34.3°C | 26.8°C | 19.2°C | 42.2°C | 15.2°C | 59 mm | 58% | 1 m/s | 6.7 |
| 2019 🔥 | 35.9°C | 28.2°C | 20.5°C | 41.7°C | 16.5°C | 69 mm | 55% | 0.7 m/s | 7.1 |
| 2018 | 34.1°C | 26.2°C | 18.3°C | 42.1°C | 12.5°C | 18 mm | 49% | 0.9 m/s | 7.2 |
| 2017 | 33.9°C | 26.4°C | 18.9°C | 40.9°C | 14.7°C | 57 mm | 57% | 1 m/s | 6.7 |
| 2016 🌧️ | 26.9°C | 21.3°C | 15.7°C | 35.7°C | 11.4°C | 226 mm | 77% | 0.9 m/s | 6.3 |
| 2015 | 29.5°C | 23.3°C | 17.1°C | 35.3°C | 11.3°C | 142 mm | 66% | 0.8 m/s | 6.5 |
| 2014 | 33.4°C | 25.2°C | 16.9°C | 41.9°C | 12.4°C | 16 mm | 49% | 0.9 m/s | 7.5 |
| 2013 | 32.7°C | 25.2°C | 17.7°C | 41.6°C | 12.6°C | 161 mm | 60% | 1 m/s | 6.9 |
| 2012 | 28.9°C | 22.4°C | 15.9°C | 35.8°C | 9.8°C | 93 mm | 65% | 1 m/s | 6.1 |
| 2011 | 32.1°C | 25.1°C | 18.1°C | 42.1°C | 14.6°C | 56 mm | 62% | 0.9 m/s | 6.4 |
| 2010 | 31.6°C | 24.6°C | 17.7°C | 38.4°C | 10.1°C | 103 mm | 62% | 0.8 m/s | 6.7 |
| 2009 | 33.1°C | 25.0°C | 16.9°C | 39.1°C | 11.2°C | 25 mm | 53% | 0.9 m/s | 7.3 |
| 2008 | 28.9°C | 22.7°C | 16.4°C | 35.6°C | 11.1°C | 113 mm | 69% | 1 m/s | 6.2 |
| 2007 | 33.1°C | 25.1°C | 17.1°C | 41.9°C | 13.4°C | 38 mm | 53% | 0.9 m/s | 7.4 |
| 2006 | 32.7°C | 25.6°C | 18.6°C | 41.0°C | 15.7°C | 75 mm | 62% | 1 m/s | 6.2 |
| 2005 | 31.4°C | 24.1°C | 16.8°C | 41.2°C | 11.8°C | 87 mm | 59% | 1 m/s | 7 |
| 2004 | 33.2°C | 25.7°C | 18.1°C | 41.3°C | 12.1°C | 95 mm | 53% | 0.9 m/s | 7 |
| 2003 | 32.9°C | 24.6°C | 16.4°C | 40.8°C | 11.9°C | 18 mm | 53% | 1 m/s | 7.2 |
| 2002 | 31.8°C | 24.1°C | 16.5°C | 37.2°C | 13.0°C | 48 mm | 52% | 1 m/s | 7.4 |
| 2001 | 34.5°C | 26.2°C | 17.9°C | 43.2°C | 13.2°C | 76 mm | 52% | 0.9 m/s | 6.9 |
| 2000 | 27.9°C | 21.2°C | 14.5°C | 39.8°C | 10.6°C | 68 mm | 62% | 0.9 m/s | 6.8 |
| 1999 | 32.4°C | 25.0°C | 17.6°C | 39.4°C | 14.9°C | 76 mm | 60% | 0.8 m/s | 6.8 |
| 1998 | 32.1°C | 25.0°C | 17.8°C | 40.1°C | 13.3°C | 104 mm | 59% | 0.9 m/s | 6.8 |
| 1997 | 27.9°C | 21.1°C | 14.2°C | 37.3°C | 9.6°C | 110 mm | 62% | 1 m/s | 6.6 |
| 1996 | 28.3°C | 22.3°C | 16.2°C | 37.7°C | 13.4°C | 140 mm | 72% | 0.9 m/s | 5.8 |
| 1995 | 27.2°C | 21.2°C | 15.2°C | 34.2°C | 10.4°C | 128 mm | 70% | 0.9 m/s | 6.2 |
| 1994 | 32.4°C | 24.4°C | 16.5°C | 38.9°C | 11.7°C | 57 mm | 50% | 1 m/s | 7.5 |
| 1993 | 31.8°C | 24.7°C | 17.5°C | 37.9°C | 13.5°C | 78 mm | 63% | 0.9 m/s | 6.3 |
| 1992 | 30.6°C | 23.0°C | 15.4°C | 38.8°C | 10.6°C | 68 mm | 60% | 0.8 m/s | 7 |
| 1991 | 31.8°C | 24.9°C | 18.0°C | 37.2°C | 12.6°C | 111 mm | 59% | 0.8 m/s | 6.8 |
| 1990 | 31.1°C | 23.5°C | 15.9°C | 41.7°C | 10.0°C | 101 mm | 61% | 0.9 m/s | 6.5 |
| 1989 ❄️ | 26.8°C | 20.8°C | 14.8°C | 34.3°C | 11.5°C | 100 mm | 69% | 1 m/s | 6.7 |
| 1988 | 30.0°C | 23.0°C | 16.1°C | 36.3°C | 11.0°C | 156 mm | 67% | 0.8 m/s | 7.3 |
| 1987 | 32.6°C | 25.0°C | 17.5°C | 39.8°C | 11.5°C | 99 mm | 54% | 0.8 m/s | 6.9 |
| 1986 | 29.3°C | 22.1°C | 14.8°C | 37.1°C | 10.2°C | 120 mm | 57% | 0.9 m/s | 7.2 |
| 1985 | 34.0°C | 24.9°C | 15.8°C | 40.3°C | 11.8°C | 18 mm | 42% | 0.9 m/s | 7.8 |
| 1984 | 26.9°C | 20.9°C | 14.9°C | 33.2°C | 9.3°C | 200 mm | 70% | 0.9 m/s | 6.2 |
| 1983 | 32.4°C | 24.5°C | 16.6°C | 37.5°C | 11.2°C | 51 mm | 51% | 0.8 m/s | — |
| 1982 | 31.9°C | 24.5°C | 17.1°C | 40.0°C | 13.1°C | 103 mm | 61% | 0.9 m/s | — |
| 1981 | 33.9°C | 26.0°C | 18.0°C | 40.4°C | 12.2°C | 45 mm | 57% | 0.9 m/s | — |
Actual recorded January data for each year, 1981–2025 — sourced from NASA POWER.
The average high in January is around 31.3°C with lows near 16.9°C (mean 24.1°C), based on 45 years of NASA POWER data.
January averages 88 mm of rainfall in Muswellbrook, a relatively wet time of year. The wettest on record was 226 mm in 2016.
The hottest January reached 43.2°C in 2001. The coldest dipped to 9.3°C in 1984.
Comparing the earliest years on record (1981–1985) with the most recent (2021–2025), average January temperatures have fallen by about 0.6°C — but days and nights have moved in opposite directions. Overnight lows rose from 16.5°C to 17°C while daytime highs eased from 31.8°C to 30.1°C, narrowing the gap between day and night.
January is one of the warmer months of the year in Muswellbrook and a relatively wet time of year, so plan for around 31.3°C daytime highs and 16.9°C at night.
Not quite — January is the 12th coolest month in Muswellbrook, averaging 24.1°C.
For January in Muswellbrook, pack light, breathable clothing and sun protection, with typical highs of 31.3°C and lows of 16.9°C. Bring an umbrella or light rain jacket too.
Relative humidity in January averages 60% — moderately humid.
Average wind speed in January is 0.9 m/s. The windiest January on record averaged 1 m/s (1989).
The wettest January on record was 2016 with 226 mm. On average, January sees 88 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 Muswellbrook 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.
