Climate Insights for Cessnock

The climate in Cessnock is hot. The average annual temperature is 27°C and approximately 268mm of precipitation falls per year. May is the wettest month, receiving around 33mm of rainfall. Cessnock 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: June, February, March. The coldest months are January, May, April, when temperatures can drop to 19°C.

Cessnock sees moderate temperature variation throughout the year, ranging from 19°C to 34°C. The warmest month is June, when average highs reach 34°C and the mean temperature sits around 29°C. January is the coolest month, with minimum temperatures around 19°C and an average of 21°C. Daily temperature variation is modest, with an average difference of 5°C between highs and lows. The sharpest temperature change occurs between January and February, with a 7°C shift in average temperatures.

Cessnock is a quite dry location, receiving approximately 268mm of precipitation annually, which averages out to around 22mm per month. The wettest month is January, averaging 33mm of rainfall. February and March also tend to see above-average precipitation. The driest month is June, with just 3mm. That's 30mm less than January, the wettest month. Rainfall is heavily concentrated in certain months, creating a distinct wet and dry season. Visitors should plan around these patterns, as the difference between peak and low months is dramatic.

Cessnock 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 September, averaging 9km/h, though still comfortable for most outdoor activities. The calmest conditions occur in April, with average winds dropping to 1km/h, making it an ideal period for wind-sensitive activities. Wind speeds vary significantly across the year, with a 8km/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, 8km/h in spring, 4km/h in summer, 1km/h in autumn.

It is currently winter in Cessnock, which began on June 21, 2026. Cessnock 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 June at around 34°C, while the coldest stretch bottoms out in January near 19°C. Spring is next, beginning on September 23, 2026 — 18 days from now.

The best time to visit Cessnock is during January, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 33mm per month. By contrast, June can be uncomfortably hot with temperatures reaching 34°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 Cessnock 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.