Climate Insights for Muswellbrook

The climate in Muswellbrook is hot. The average annual temperature is 27°C and approximately 371mm of precipitation falls per year. November is the wettest month, receiving around 33mm of rainfall. Muswellbrook is in the Southern Hemisphere. The seasons are reversed — summer runs from December to February, while winter falls between June and August. The summer months are: March, April, February. The coldest months are December, November, June, when temperatures can drop to 25°C.

Muswellbrook has relatively stable temperatures year-round, staying within a 4°C range. The warmest month is March, when average highs reach 29°C and the mean temperature sits around 29°C. December is the coolest month, with minimum temperatures around 25°C and an average of 25°C. Daily temperature variation is modest, with an average difference of 1°C between highs and lows.

Muswellbrook is a quite dry location, receiving approximately 371mm of precipitation annually, which averages out to around 31mm per month. The wettest month is January, averaging 33mm of rainfall. February and April also tend to see above-average precipitation. The driest month is December, with just 13mm. Precipitation varies noticeably between seasons, with the first half (January to June) of the year generally seeing more rainfall.

Muswellbrook is relatively calm, with an average annual wind speed of 5km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is October, averaging 7km/h, though still comfortable for most outdoor activities. The calmest conditions occur in February, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 4km/h difference between the calmest and windiest months. This level of variation is worth factoring into travel plans. Wind tends to be stronger during winter months, driven by seasonal pressure systems. The seasonal averages break down to 6km/h in winter, 5km/h in spring, 4km/h in summer, 5km/h in autumn.

It is currently winter in Muswellbrook, which began on June 21, 2026. Muswellbrook is in the Southern Hemisphere, where the seasons are reversed — spring starts in September, summer in December, autumn in March, and winter in June. The warmest period peaks in March at around 29°C, while the coldest stretch bottoms out in December near 25°C. Spring is next, beginning on September 23, 2026 — 18 days from now.

The best time to visit Muswellbrook is during December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 25°C with modest rainfall averaging 13mm per month. By contrast, March can be uncomfortably hot with temperatures reaching 29°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Muswellbrook based on historical weather data. Min and max temperatures represent typical overnight lows and afternoon highs for each month, shown in degrees Celsius (°C). Precipitation is measured in millimetres (mm) and indicates the average total rainfall per month. Wind speed is the average sustained speed in kilometres per hour (km/h). All values are based on averages from over 10 years of historical weather data. The current month is highlighted for quick reference.