Climate Insights for Mount Barker

The climate in Mount Barker is temperate. The average annual temperature is 15°C and approximately 442mm of precipitation falls per year. August is the wettest month, receiving around 76mm of rainfall. Mount Barker 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: February, January, December. The coldest months are July, August, September, when temperatures can drop to 7°C.

Mount Barker sees moderate temperature variation throughout the year, ranging from 7°C to 26°C. The warmest month is February, when average highs reach 26°C and the mean temperature sits around 19°C. July is the coolest month, with minimum temperatures around 7°C and an average of 11°C. On average, daily temperatures fluctuate by about 10°C between overnight lows and afternoon highs. The sharpest temperature change occurs between March and April, with a 3°C shift in average temperatures.

Mount Barker is a relatively dry area, receiving approximately 442mm of precipitation annually, which averages out to around 37mm per month. The wettest month is August, averaging 76mm of rainfall. July and September also tend to see above-average precipitation. The driest month is January, with just 16mm. That's 60mm less than August, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Mount Barker is moderately windy, with an average annual wind speed of 21km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is July, averaging 24km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in April, with average winds dropping to 19km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 5km/h between the calmest and windiest months.

It is currently autumn in Mount Barker, which began on March 20, 2026. Mount Barker 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 February at around 26°C, while the coldest stretch bottoms out in July near 7°C. Winter is next, beginning on June 21, 2026 — 88 days from now.

The best time to visit Mount Barker is during January, February, March, April, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 17°C with modest rainfall averaging 23mm per month. By contrast, July can be quite cold with temperatures dropping to 7°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Mount Barker 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.