Prague
Czech Republic
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Prague, Czech Republic

Multiple bridges over water in Prague, in the Czech Republic, with several mountains in the distance
Multiple bridges over water in Prague, in the Czech Republic, with several mountains in the distance
September is mild and pleasant during the autumn season in Prague when the temperatures gradually decrease from the high of summer. The average temperatures drop to the comfortable range of 8.9°C (48°F) to 18.9°C (66°F) as the autumn spreads colors over the landscape.
The daylight reduces to 13 hours, while the sunlight is down to a daily 5.5 hours. The rainfall is 38.1mm (1.5"), and the skies are partly cloudy.
Although the peak tourist season is over, it is an excellent idea to plan vacations early as accommodations are still at a premium.

What is the temperature in September in Prague?

In September, the average high-temperature is 19°C (66.2°F), and the average low-temperature is 8.7°C (47.7°F).

What is the average humidity in September in Prague?

In September, the average relative humidity is 77%.

How much does it rain in Prague in September?

In Prague, in September, during 7 rainfall days, 40mm (1.6") of precipitation is typically accumulated.

Does it snow in Prague in September?

In Prague, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Prague have in September?

In September, the average length of the day in Prague is 12.6h.

How long on average sun shines in September in Prague?

The average sunshine in September is 5.4h.

What is the UV index reading in September in Prague?

The average daily maximum UV index in September in Prague is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from the exposure to the Sun's UV radiation.
Average temperature in September - Prague, Czech Republic
  • Average high temperature in September: 19°C

The warmest month (with the highest average high temperature) is July (24°C).
The month with the lowest average high temperature is January (0.4°C).

  • Average low temperature in September: 8.7°C

The month with the highest average low temperature is July (11.9°C).
The coldest month (with the lowest average low temperature) is January (-5.4°C).

Average humidity in September - Prague, Czech Republic
  • Average humidity in September: 77%

Months with the highest relative humidity are January, November and December (85%).
Months with the lowest relative humidity are April, May and July (70%).

Average rainfall in September - Prague, Czech Republic
  • Average rainfall in September: 40mm

The wettest month (with the highest rainfall) is May (77.2mm).
The driest month (with the lowest rainfall) is February (22.6mm).

Average rainfall days in September - Prague, Czech Republic
  • Average rainfall days in September: 7 days

The month with the highest number of rainy days is June (10.3 days).
The month with the lowest number of rainy days is October (5.5 days).

Average snowfall in September - Prague, Czech Republic
  • Average snowfall in September: 0mm

The month with the highest snowfall is January (179mm).
Months with the lowest snowfall are May, June, July, August and September (0mm).

Average daylight in September / Average sunshine in September - Prague, Czech Republic
  • Average daylight in September: 12.6h

The month with the longest days is June (Average daylight: 16.3h).
The month with shortest days is December (Average daylight: 8.2h).

  • Average sunshine in September: 5.4h

Months with most sunshine are June and July (Average sunshine: 7.3h).
The month with least sunshine is December (Average sunshine: 1.5h).

Average UV index in September - Prague, Czech Republic
  • Average UV index in September: 4

The month with the highest UV index is June (UV index 7).
Months with the lowest UV index are January, February, November and December (UV index 1).