Avg weather in September
12 Hrs per day
70 mm per month
76 % avg
6 Mph avg

Prague Weather in September

What’s the weather like in Prague in September?

Following the peak of summer, the weather starts to get colder in September and it’s not as hot as previous months. However, there are fewer crowds in the city and plenty of sunshine, which is great if you prefer a cooler climate on holiday.

Geographical influences

Prague is on the Vltava river in the Czech Republic and has an oceanic climate with warm summers and cold, humid winters. The Sudetes and nearby mountain ranges get most of the rainfall, which means Prague is quite dry with just a few showers spread over the month.


Prague weather in September is mild with an average temperature of 21°C. At night, the weather cools to 11°C, which is quite cold so don’t forget to take a jacket out with you in the evening. You’ll have eight hours of sunshine per day, which is slightly less sunlight than in August. Humidity is at 75%, which is quite high and continues to increase towards late autumn and winter. The average rainfall is 39mm, which means you can expect around 15 rainy days over the month.

View weather for