Climate Insights for Kojonup

The climate in Kojonup is temperate. The average annual temperature is 15°C and approximately 365mm of precipitation falls per year. August is the wettest month, receiving around 56mm of rainfall. Kojonup 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: January, February, December. The coldest months are July, August, June, when temperatures can drop to 6°C.

Temperatures in Kojonup vary considerably across the year, with a 23°C difference between the coldest and warmest months. The warmest month is January, when average highs reach 29°C and the mean temperature sits around 21°C. July is the coolest month, with minimum temperatures around 6°C and an average of 10°C. On average, daily temperatures fluctuate by about 11°C between overnight lows and afternoon highs. The sharpest temperature change occurs between March and April, with a 3°C shift in average temperatures.

Kojonup is a quite dry location, receiving approximately 365mm of precipitation annually, which averages out to around 30mm per month. The wettest month is August, averaging 56mm of rainfall. July and June also tend to see above-average precipitation. The driest month is December, with just 14mm. That's 42mm 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.

Kojonup is moderately windy, with an average annual wind speed of 22km/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 20km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months.

It is currently autumn in Kojonup, which began on March 20, 2026. Kojonup 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 January at around 29°C, while the coldest stretch bottoms out in July near 6°C. Winter is next, beginning on June 21, 2026 — 88 days from now.

The best time to visit Kojonup is during January, February, March, April, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 19°C with modest rainfall averaging 21mm per month. By contrast, July can be quite cold with temperatures dropping to 6°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Kojonup 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.