Kalmar
Sweden
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Kalmar, Sweden

The first month of the autumn, September, is still a comfortable month in Kalmar, Sweden, with average temperature fluctuating between 8.3°C (46.9°F) and 17.7°C (63.9°F).

Temperature

In Kalmar, the average high-temperature marginally drops, from an agreeable 21.7°C (71.1°F) in August, to an enjoyable 17.7°C (63.9°F). The average low-temperature, in September, is 8.3°C (46.9°F).

Rainfall

In Kalmar, in September, it is raining for 13 days, with typically 50.1mm (2") of accumulated precipitation. Throughout the year, in Kalmar, there are 154 rainfall days, and 483.3mm (19") of precipitation is accumulated.

Sea temperature

In Kalmar, the average seawater temperature is 15.9°C (60.6°F). Swimming in 15.9°C (60.6°F) is not enjoyable for the majority. Controlling breathing becomes progressively more difficult as surface water temperature decreases below 21°C (69.8°F).

Daylight

In Kalmar, the average length of the day in September is 12.8h.

Sunshine

In Kalmar, the average sunshine is 5h.

UV index

The average daily maximum UV index in Kalmar is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to the Sun's UV rays for average individuals.
In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.

What is the temperature in September in Kalmar?

The average high-temperature, in September, is 17.7°C (63.9°F), while the average low-temperature is 8.3°C (46.9°F).

How many days does it rain in September in Kalmar?

In Kalmar, in September, it is raining for 13 days, with typically 50.1mm (2") of accumulated precipitation.

What is the sea water temperature in September in Kalmar?

In Kalmar, Sweden, the average seawater temperature in September is 15.9°C (60.6°F). For swimming, a surface water temperature of 15.9°C (60.6°F) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 21°C (69.8°F).

How many hours of daylight does Kalmar have in September?

In Kalmar, Sweden, the average length of the day in September is 12.8h.

How long on average sun shines in September in Kalmar?

The average sunshine in September is 5h.

How high is the UV index in September in Kalmar?

In Kalmar, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate health threat from the exposure to the Sun's UV rays.
Average temperature in September - Kalmar, Sweden
  • Average high temperature in September: 17.7°C

The warmest month (with the highest average high temperature) is July (22.6°C).
The month with the lowest average high temperature is January (1.8°C).

  • Average low temperature in September: 8.3°C

The month with the highest average low temperature is July (12.5°C).
The coldest month (with the lowest average low temperature) is February (-3.8°C).

Average rainfall in September - Kalmar, Sweden
  • Average rainfall in September: 50.1mm

The wettest month (with the highest rainfall) is July (59.5mm).
The driest month (with the lowest rainfall) is February (28.9mm).

Average rainfall days in September - Kalmar, Sweden
  • Average rainfall days in September: 13 days

The month with the highest number of rainy days is January (17 days).
The month with the lowest number of rainy days is June (9 days).

Average sea temperature in September - Kalmar, Sweden
  • Average sea temperature in September: 15.9°C

The best month for swimming (with the highest average sea temperature) is August (18.3°C).
The coldest month (with the lowest average sea temperature) is March (1.9°C).

Average daylight in September / Average sunshine in September - Kalmar, Sweden
  • Average daylight in September: 12.8h

The month with the longest days is June (Average daylight: 17.7h).
The month with shortest days is December (Average daylight: 6.9h).

  • Average sunshine in September: 5h

The month with most sunshine is June (Average sunshine: 9h).
Months with least sunshine are January and December (Average sunshine: 1).

Average UV index in September - Kalmar, Sweden
  • Average UV index in September: 3

The month with the highest UV index is June (UV index 6).
Months with the lowest UV index are January, November and December (UV index 0).