September weather forecastIwonie, Poland

September

Weather in September

September, the first month of the autumn in Iwonie, is still a refreshing month, with an average temperature fluctuating between 11.3°C (52.3°F) and 19.5°C (67.1°F).

Temperature

Observing a mild shift, the average high-temperature during September reduces from August's moderately hot 25°C (77°F) to a comfortable 19.5°C (67.1°F). The average temperature during September nights in Iwonie is registered at a fresh 11.3°C (52.3°F).

Humidity

The average relative humidity in September is 71%.

Rainfall

In Iwonie, in September, during 11.5 rainfall days, 31mm (1.22") of precipitation is typically accumulated. Throughout the year, in Iwonie, there are 128.6 rainfall days, and 338mm (13.31") of precipitation is accumulated.

Snowfall

In Iwonie, snow does not fall in May through September.

Daylight

The average length of the day in September in Iwonie is 12h and 39min.
On the first day of the month, sunrise is at 05:57 and sunset at 19:31. On the last day of September, in Iwonie, sunrise is at 06:44 and sunset at 18:23 CEST.

Sunshine

The average sunshine in September in Iwonie is 8.1h.

UV index

In September, the average daily maximum UV index in Iwonie is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index of 4 during September leads to these instructions:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. To protect against the Sun's most potent rays, avoid direct exposure around midday. Experience reduced UV exposure by about half when donning a wide-brim hat.

Updated: Feb 1, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

September temperatures in Iwonie, Poland, vary between a high-temperature of 19.5°C (67.1°F) and a low-temperature of 11.3°C (52.3°F).

In Iwonie, the average relative humidity in September is 71%.

In Iwonie, Poland, in September, it is raining for 11.5 days, with typically 31mm (1.22") of accumulated precipitation.

May through September are months without snowfall.

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

In Iwonie, Poland, the average day length in September is 12h and 39min.

On the first day of September in Iwonie, sunrise is at 05:57 and sunset at 19:31. On the last day of the month, sunrise is at 06:44 and sunset at 18:23 CEST.

In September, the average sunshine duration in Iwonie, Poland, is 8.1h.

The average daily maximum UV index in September in Iwonie, Poland, is 4. A UV Index reading of 3 to 5 represents a moderate health threat from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

25°C

19.5°C

13°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

12.1km/h

12.7km/h

14km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

16.5

16.8

20.2

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Iwonie, Poland

Average high temperature in September: 19.5°C

The warmest month (with the highest average high temperature) is August (25°C).
The month with the lowest average high temperature is January (0.2°C).

Average low temperature in September: 11.3°C

The month with the highest average low temperature is August (15.5°C).
The coldest month (with the lowest average low temperature) is January (-3°C).

Average pressure in September
Iwonie, Poland

Average pressure in September: 1017.4mbar

The month with the highest atmospheric pressure is October (1018.2mbar).
The month with the lowest atmospheric pressure is July (1014mbar).

Average wind speed in September
Iwonie, Poland

Average wind speed in September: 12.2km/h

The windiest month (with the highest average wind speed) is December (14.9km/h).
The calmest month (with the lowest average wind speed) is August (11.3km/h).

Average humidity in September
Iwonie, Poland

Average humidity in September: 71%

The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is August (64%).

Average rainfall in September
Iwonie, Poland

Average rainfall in September: 31mm

The wettest month (with the highest rainfall) is June (49mm).
The driest month (with the least rainfall) is April (12mm).

Average rainfall days in September
Iwonie, Poland

Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is February (6 days).

Average snowfall in September
Iwonie, Poland

Average snowfall in September: 0mm

The month with the highest snowfall is January (56mm).
The months with the least snowfall are May, June, July, August and September (0mm).

Average snowfall days in September
Iwonie, Poland

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (10 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September: 12h and 36min

The month with the longest days is June (Average daylight: 16h and 36min).
The month with the shortest days is December (Average daylight: 7h and 54min).

Average sunshine in September: 8h and 6min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 3h and 6min).