September weather forecast
Warsaw, Poland

September marks the onset of autumn in Warsaw. Gradually receding temperatures bring a fresh and crisp feel to the air. The shift towards cooler weather leads to the transformation of the city's foliage into entrancing hues of red, orange, and yellow. As temperatures dwindle from 8.6°C (47.5°F) to 17.9°C (64.2°F), outdoor festivities give way to more tranquil engagements. The streets buzz with cultural happenings, making it a prime time for attending concerts and theater productions.

Temperature

Transition into September in Warsaw marks a drop in the average high-temperature, moving from a moderately hot 23.4°C (74.1°F) in August to an enjoyable 17.9°C (64.2°F). Warsaw throughout September, records an average low-temperature of 8.6°C (47.5°F).

Rainfall

In September, in Warsaw, the rain falls for 12 days. Throughout September, 47mm (1.85") of precipitation is accumulated. Throughout the year, there are 159 rainfall days, and 532mm (20.94") of precipitation is accumulated.

Daylight

In September, the average length of the day in Warsaw is 12h and 40min.
On the first day of the month, sunrise is at 05:48 and sunset at 19:23. On the last day of September, sunrise is at 06:36 and sunset at 18:15 CEST.

Sunshine

In Warsaw, the average sunshine in September is 5h.

UV index

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 4 in September transforms into the following instructions:
Exercise prevention - Warding off sunburn is urged. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.