September weather forecast
Koszalin, Poland

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Weather in September

In September, Koszalin witnesses impending signs of autumn amidst a lingering summer aura. The weather note flips from a sizzling summer to cooler spells, foreshadowing a seasonal shift. Despite rainfall registering at 82mm (3.23") over 11.1 days, the nostalgic summer joy radiates through the prevalent daylight hours. The transformation in Koszalin's weather map makes this month captivating for amateur meteorologists and nature lovers alike.

Temperature

September is marked by a subtle drop in average high-temperatures, transitioning from a pleasant 21°C (69.8°F) in August to a refreshing 17.3°C (63.1°F). Koszalin's temperature lowers to a mean of 9.5°C (49.1°F) during the nights in September.

Rainfall

In Koszalin, in September, it is raining for 11.1 days, with typically 82mm (3.23") of accumulated precipitation. Throughout the year, in Koszalin, there are 118.7 rainfall days, and 704mm (27.72") of precipitation is accumulated.

Daylight

In September, the average length of the day is 12h and 42min.
On the first day of September, sunrise is at 06:04 and sunset at 19:46. On the last day of the month, sunrise is at 06:56 and sunset at 18:33 CEST.

Sunshine

In September, the average sunshine is 4.5h.

UV index

In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for the ordinary person.
Note: In September, the maximum UV index of 3 transforms into these recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Enhance your sun protection with tightly woven, yet airy clothing.
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Frequently asked questions

What is the average September temperature in Koszalin?

In Koszalin, in September, the average high-temperature is 17.3°C (63.1°F), and the average low-temperature is 9.5°C (49.1°F).

How many days does it rain in September in Koszalin?

In Koszalin, Poland, in September, it is raining for 11.1 days, with typically 82mm (3.23") of accumulated precipitation.

How many hours of daylight does Koszalin have in September?

In September, the average day length is 12h and 42min.

When are sunrise and sunset in September in Koszalin?

On the first day of September in Koszalin, Poland, sunrise is at 06:04 and sunset at 19:46. On the last day of the month, sunrise is at 06:56 and sunset at 18:33 CEST.

How many hours of sunshine does Koszalin have in September?

In Koszalin, the average sunshine duration in September is 4.5h.

What is the UV index reading in September in Koszalin?

In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium hazard to health from exposure to Sun's UV rays.
Average rainfall days
Average daylight
Average sunshine
Average UV index

Average temperature in September
Koszalin, Poland

Average temperature in September - Koszalin, Poland
  • Average high temperature in September: 17.3°C

The warmest month (with the highest average high temperature) is August (21°C).
The month with the lowest average high temperature is January (0.9°C).

  • Average low temperature in September: 9.5°C

The month with the highest average low temperature is July (12.3°C).
The coldest month (with the lowest average low temperature) is January (-3.9°C).

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Average rainfall in September
Koszalin, Poland

Average rainfall in September - Koszalin, Poland
  • Average rainfall in September: 82mm

The wettest month (with the highest rainfall) is July (88mm).
The driest month (with the least rainfall) is February (30mm).

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Average rainfall days in September
Koszalin, Poland

Average rainfall days in September - Koszalin, Poland
  • Average rainfall days in September: 11.1 days

The month with the highest number of rainy days is November (12.6 days).
The month with the least rainy days is February (7.9 days).

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

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

The month with the longest days is June (Average daylight: 17h and 6min).
The month with the shortest days is December (Average daylight: 7h and 24min).

  • Average sunshine in September: 4h and 3min

The month with the most sunshine is June (Average sunshine: 7h and 42min).
The month with the least sunshine is December (Average sunshine: 0h and 54min).

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Average UV index in September
Koszalin, Poland

Average UV index in September - Koszalin, Poland
  • Average UV index in September: 3

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

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Koszalin, Poland

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