Climate Insights for Thames

The climate in Thames is temperate. The average annual temperature is 15°C and approximately 1120mm of precipitation falls per year. Thames receives a notable amount of rainfall throughout the year, including during its driest month. Thames 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 July, August, June, when temperatures can drop to 7°C.

Thames sees moderate temperature variation throughout the year, ranging from 7°C to 24°C. January is the warmest month, though highs remain moderate at 24°C with a mean of 20°C. July is the coolest month, with minimum temperatures around 7°C and an average of 10°C. Daily temperature variation is modest, with an average difference of 7°C between highs and lows. The sharpest temperature change occurs between April and May, with a 3°C shift in average temperatures.

Thames is a moderately rainy area, receiving approximately 1120mm of precipitation annually, which averages out to around 93mm per month. The wettest month is September, averaging 122mm of rainfall. July and August also tend to see above-average precipitation. The driest month is January, with just 74mm. That's 48mm less than September, the wettest month. Rainfall is relatively evenly distributed throughout the year, so there is no pronounced dry or wet season to plan around.

Thames is mildly breezy, with an average annual wind speed of 20km/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 22km/h, noticeable enough to affect lighter outdoor activities. The calmest conditions occur in March, with average winds dropping to 18km/h, making it an ideal period for wind-sensitive activities. Wind conditions are fairly consistent throughout the year, varying by only 4km/h between the calmest and windiest months.

It is currently autumn in Thames, which began on March 20, 2026. Thames 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 24°C, while the coldest stretch bottoms out in July near 7°C. Winter is next, beginning on June 21, 2026 — 89 days from now.

The best time to visit Thames is during January, February, March, April, November and December, when the weather is most comfortable for travellers. During these months, average temperatures hover around 18°C with modest rainfall averaging 87mm per month. By contrast, July can be quite cold with temperatures dropping to 7°C. Despite being the best months overall, some rain is still likely — pack a waterproof layer and plan a mix of indoor and outdoor activities.

The table below shows monthly climate averages for Thames 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.