Climate Insights for Charlton

The climate in Charlton is temperate. The average annual temperature is 11°C and approximately 622mm of precipitation falls per year. June is the wettest month, receiving around 117mm of rainfall. Charlton is in the Northern Hemisphere. Summer begins at the end of June and lasts through September. The summer months are: August, July, September. The coldest months are February, March, January, when temperatures can drop to 3°C.

Charlton sees moderate temperature variation throughout the year, ranging from 3°C to 23°C. August is the warmest month, though highs remain moderate at 23°C with a mean of 18°C. February is the coolest month, with minimum temperatures around 3°C and an average of 6°C. Daily temperature variation is modest, with an average difference of 6°C between highs and lows. The sharpest temperature change occurs between September and October, with a 6°C shift in average temperatures.

Charlton is a relatively dry area, receiving approximately 622mm of precipitation annually, which averages out to around 52mm per month. The wettest month is June, averaging 117mm of rainfall. January and March also tend to see above-average precipitation. The driest month is December, with just 11mm. That's 106mm 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.

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 February, averaging 5km/h, though still comfortable for most outdoor activities. The calmest conditions occur in December, with average winds dropping to 4km/h, making it an ideal period for wind-sensitive activities. There is moderate seasonal variation in wind speed, with a 1km/h gap between the calmest and windiest months.

It is currently summer in Charlton, which began on June 21, 2026. Charlton is in the Northern Hemisphere, where spring begins in March, summer in June, autumn in September, and winter in December. The warmest period peaks in August at around 23°C, while the coldest stretch bottoms out in February near 3°C. Autumn is next, beginning on September 23, 2026 — 52 days from now.

The best time to visit Charlton is during July, August and September, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 40mm per month. By contrast, February can be quite cold with temperatures dropping to 3°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.