Climate Insights for Coonamble

The climate in Coonamble is warm and mild. The average annual temperature is 20°C and approximately 445mm of precipitation falls per year. March is the wettest month, receiving around 51mm of rainfall. Coonamble 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, December, February. The coldest months are August, July, June, when temperatures can drop to 5°C.

Temperatures in Coonamble vary considerably across the year, with a 31°C difference between the coldest and warmest months. January is the hottest month, with daytime highs reaching 36°C and an average of 30°C. August is the coolest month, with minimum temperatures around 5°C and an average of 11°C. On average, daily temperatures fluctuate by about 13°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 6°C shift in average temperatures.

Coonamble is a relatively dry area, receiving approximately 445mm of precipitation annually, which averages out to around 37mm per month. The wettest month is March, averaging 51mm of rainfall. December and October also tend to see above-average precipitation. The driest month is July, with just 23mm. That's 28mm less than March, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

Coonamble is relatively calm, with an average annual wind speed of 4km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is November, averaging 4km/h, though still comfortable for most outdoor activities. The calmest conditions occur in July, with average winds dropping to 3km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 1km/h between the calmest and windiest months.

It is currently winter in Coonamble, which began on June 21, 2026. Coonamble 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 36°C, while the coldest stretch bottoms out in August near 5°C. Spring is next, beginning on September 23, 2026 — 89 days from now.

The best time to visit Coonamble is during March, April, September, October and November, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 40mm per month. By contrast, January can be uncomfortably hot with highs reaching 36°C, while August is the coldest period with lows dropping to 5°C. A light rain jacket is recommended, though showers are generally brief and shouldn't disrupt your plans.

The table below shows monthly climate averages for Coonamble 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.