September weather forecast
Warsaw, Poland

englishespañol中文
Share
The old town square of Warsaw, Poland
The old town square of Warsaw, Poland

Weather in September

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.

Frequently asked questions

What is the usual temperature for Warsaw in September?

In September, in Warsaw, the average high-temperature is 17.9°C (64.2°F), and the average low-temperature is 8.6°C (47.5°F).

How many days does it rain in September in Warsaw?

In September, in Warsaw, Poland, the rain falls for 12 days. Throughout September, 47mm (1.85") of precipitation is accumulated.

What is the average length of the day in September in Warsaw?

The average day length in September in Warsaw, Poland, is 12h and 40min.

When is the sunrise / sunset in September in Warsaw?

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

How long on average sun shines in September in Warsaw?

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

How high is the UV index in September in Warsaw?

In September, the average daily maximum UV index in Warsaw is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in September
Warsaw, Poland

Average temperature in September - Warsaw, Poland
  • Average high temperature in September: 17.9°C

The warmest month (with the highest average high temperature) is July (23.6°C).
The month with the lowest average high temperature is January (0.4°C).

  • Average low temperature in September: 8.6°C

The month with the highest average low temperature is July (12.9°C).
The coldest month (with the lowest average low temperature) is January (-4.8°C).

Average rainfall in September
Warsaw, Poland

Average rainfall in September - Warsaw, Poland
  • Average rainfall in September: 47.3mm

The wettest month (with the highest rainfall) is July (72.9mm).
The driest month (with the least rainfall) is February (26.1mm).

Average rainfall days in September
Warsaw, Poland

Average rainfall days in September - Warsaw, Poland
  • Average rainfall days in September: 12 days

The month with the highest number of rainy days is December (16 days).
The months with the least rainy days are April, May, August and September (12 days).

Average daylight in September /
Average sunshine in September
Warsaw, Poland

Average daylight in September / Average sunshine in September - Warsaw, Poland
  • Average daylight in September: 12h and 4min

The month with the longest days is June (Average daylight: 16h and 42min).
The month with the shortest days is December (Average daylight: 7h and 48min).

  • Average sunshine in September: 5h

The months with the most sunshine are June and July (Average sunshine: 8h).
The months with the least sunshine are January and December (Average sunshine: 1h).

Average UV index in September
Warsaw, Poland

Average UV index in September - Warsaw, Poland
  • Average UV index in September: 4

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 0).

Warsaw, Poland

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location