Climate Insights for Charlton

The climate in Charlton is temperate. The average annual temperature is 16°C and approximately 420mm of precipitation falls per year. May is the wettest month, receiving around 47mm of rainfall. Charlton 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 June, August, July, when temperatures can drop to 5°C.

Temperatures in Charlton vary considerably across the year, with a 28°C difference between the coldest and warmest months. The warmest month is January, when average highs reach 33°C and the mean temperature sits around 25°C. June is the coolest month, with minimum temperatures around 5°C and an average of 9°C. On average, daily temperatures fluctuate by about 12°C between overnight lows and afternoon highs. The sharpest temperature change occurs between April and May, with a 5°C shift in average temperatures.

Charlton is a relatively dry area, receiving approximately 420mm of precipitation annually, which averages out to around 35mm per month. The wettest month is May, averaging 47mm of rainfall. August and September also tend to see above-average precipitation. The driest month is March, with just 18mm. That's 30mm less than May, the wettest month. Precipitation varies noticeably between seasons, with the second half (July to December) of the year generally seeing more rainfall.

Charlton 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 June, 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 Charlton, which began on June 21, 2026. Charlton 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 33°C, while the coldest stretch bottoms out in June near 5°C. Spring is next, beginning on September 23, 2026 — 89 days from now.

The best time to visit Charlton is during January, February, March, April, October, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 20°C with modest rainfall averaging 31mm per month. By contrast, June can be quite cold with temperatures 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 Charlton 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.