Climate Insights for Denham

The climate in Denham is warm and mild. The average annual temperature is 22°C and approximately 160mm of precipitation falls per year. June is the wettest month, receiving around 37mm of rainfall. Denham 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, March, January. The coldest months are July, August, June, when temperatures can drop to 15°C.

Denham sees moderate temperature variation throughout the year, ranging from 15°C to 31°C. The warmest month is February, when average highs reach 31°C and the mean temperature sits around 27°C. July is the coolest month, with minimum temperatures around 15°C and an average of 18°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between April and May, with a 3°C shift in average temperatures.

Denham is a quite dry location, receiving approximately 160mm of precipitation annually, which averages out to around 13mm per month. The wettest month is June, averaging 37mm of rainfall. July and March also tend to see above-average precipitation. The driest month is December, with just 1mm. That's 35mm less than June, 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.

Denham is very windy, with an average annual wind speed of 32km/h. For context, sustained winds below 12km/h are generally light, while anything above 25km/h is considered strong. The windiest month is January, averaging 38km/h, which can feel quite blustery and may affect outdoor activities. The calmest conditions occur in July, with average winds dropping to 26km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 12km/h gap between the calmest and windiest months. Wind tends to pick up during the summer months. The seasonal averages are 27km/h in winter, 35km/h in spring, 37km/h in summer, 30km/h in autumn.

It is currently autumn in Denham, which began on March 20, 2026. Denham 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 31°C, while the coldest stretch bottoms out in July near 15°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Denham is during April, May, June, July, August, September, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 21°C with modest rainfall averaging 13mm per month. By contrast, February can be uncomfortably hot with temperatures reaching 31°C. With minimal rainfall expected, you can pack light and plan outdoor activities with confidence.

The table below shows monthly climate averages for Denham 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.