September weather forecast
Wrocław, Poland

September instigates autumn in Wrocław, as temperatures start to descend after summer's peak. The migration towards a cooler environment is signaled by shorter daylight hours and a decline in Sunshine duration. September's balanced weather conditions offer locals and visitors plenty of opportunities to enjoy the city prior to the onset of winter. With the fall setting in, October's chillier touch looms on the horizon.

Temperature

The onset of September in Wrocław comes with a shift in the average high-temperature, falling from a warm 25°C (77°F) in August to an enjoyable 19°C (66.2°F). During September, Wrocław records an average temperature of 9°C (48.2°F) at night.

Humidity

In September, the average relative humidity is 75%.

Rainfall

In Wrocław, during September, the rain falls for 11 days and regularly aggregates up to 43mm (1.69") of precipitation. In Wrocław, Poland, during the entire year, the rain falls for 151 days and collects up to 562mm (22.13") of precipitation.

Daylight

In September, the average length of the day is 12h and 38min.
On the first day of September, sunrise is at 06:05 and sunset at 19:37. On the last day of the month, sunrise is at 06:51 and sunset at 18:31 CEST.

Sunshine

In September, the average sunshine in Wrocław is 5.5h.

UV index

The average daily maximum UV index in September in Wrocław is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Put precautions into practice - Guidance to elude sunburn is provided. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck.