September weather forecast
Poznań, Poland

September in Poznań, Poland signals the transition to the cooler seasons, with a distinct drop in temperature from summer highs. As autumn sets in, the splendid sunshine of the summer gives way to cooler cloudier days. The decrease in the temperature, daylight, and UV index subtly ushers in the onset of fall. Rain becomes a frequent visitor, rendering the city landscapes in vibrant autumn colors. With fewer daylight hours, evenings seemingly arrive earlier, announcing the near end of long summer days.

Temperature

In September, the average high-temperature in Poznań, Poland, goes from a moderately hot 24.5°C (76.1°F) in August to a comfortable 19.3°C (66.7°F). In the month of September, Poznań records a consistent average low-temperature of 11.3°C (52.3°F).

Humidity

In Poznań, Poland, the average relative humidity in September is 74%.

Rainfall

In September, in Poznań, Poland, the rain falls for 9 days. Throughout September, 42mm (1.65") of precipitation is accumulated. In Poznań, during the entire year, the rain falls for 142 days and collects up to 524mm (20.63") of precipitation.

Daylight

In Poznań, the average length of the day in September is 12h and 40min.
On the first day of the month, sunrise is at 06:04 and sunset at 19:39. On the last day of September, sunrise is at 06:52 and sunset at 18:31 CEST.

Sunshine

In September, the average sunshine is 5.7h.

UV index

The average daily maximum UV index in September in Poznań is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for average individuals.
Note: A maximum high UV index of 4 in September translates into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.