September weather forecast and climate
Kalmar, Sweden

Weather in September

The first month of the autumn, September, is also an enjoyable month in Kalmar, Sweden, with average temperature ranging between max 16.7°C (62.1°F) and min 11.3°C (52.3°F).

Temperature

In Kalmar, the average high-temperature marginally drops, from an agreeable 20.8°C (69.4°F) in August, to a comfortable 16.7°C (62.1°F). In Kalmar, Sweden, in September, the average low-temperature is 11.3°C (52.3°F).

Humidity

The average relative humidity in September is 78%.

Rainfall

In September, in Kalmar, the rain falls for 10.3 days. Throughout September, 18mm (0.71") of precipitation is accumulated. In Kalmar, during the entire year, the rain falls for 127.2 days and collects up to 299mm (11.77") of precipitation.

Snowfall

In Kalmar, Sweden, snow does not fall in June through September.

Sea temperature

In September, the average sea temperature is 15.9°C (60.6°F).
Note: 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).

Daylight

In September, the average length of the day is 12.7h.

Sunshine

The average sunshine in Kalmar is 8.6h.

UV index

In September, the average daily maximum UV index in Kalmar is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to the Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 4 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.
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FAQ

What is the average humidity in September in Kalmar?

In Kalmar, the average relative humidity in September is 78%.

How many days does it rain in September in Kalmar?

In September, the rain falls for 10.3 days. Throughout September, 18mm (0.71") of precipitation is accumulated.

When it does not snow in Kalmar?

June through September are months without snowfall in Kalmar, Sweden.

Does it snow in Kalmar in September?

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

What is the sea temperature in September in Kalmar?

In Kalmar, Sweden, in September, the average water 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).

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

In Kalmar, the average length of the day in September is 12.7h.

How many hours of sunshine does Kalmar have in September?

In September, the average sunshine in Kalmar, Sweden, is 8.6h.

How high is the UV index in September in Kalmar?

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from unsafe exposure to the Sun's UV rays.

Average temperature in September
Kalmar, Sweden

Average temperature in September - Kalmar, Sweden
  • Average high temperature in September: 16.7°C

The warmest month (with the highest average high temperature) is July (21°C).
The month with the lowest average high temperature is January (1.6°C).

  • Average low temperature in September: 11.3°C

The month with the highest average low temperature is July (14.1°C).
The coldest months (with the lowest average low temperature) are January and February (-1.3°C).

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Average pressure in September
Kalmar, Sweden

Average pressure in September - Kalmar, Sweden
  • Average pressure in September: 1014.9mbar

Months with the highest atmospheric pressure are April and May (1015.4mbar).
The month with the lowest atmospheric pressure is December (1010.2mbar).

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Average wind speed in September
Kalmar, Sweden

Average wind speed in September - Kalmar, Sweden
  • Average wind speed in September: 16.3km/h

The windiest month (with the highest average wind speed) is December (18.8km/h).
The calmest month (with the lowest average wind speed) is May (14.1km/h).

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Average humidity in September
Kalmar, Sweden

Average humidity in September - Kalmar, Sweden
  • Average humidity in September: 78%

Months with the highest relative humidity are January, February, November and December (86%).
Months with the lowest relative humidity are April and May (71%).

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Average rainfall in September
Kalmar, Sweden

Average rainfall in September - Kalmar, Sweden
  • Average rainfall in September: 18mm

The wettest month (with the highest rainfall) is July (36mm).
The driest month (with the least rainfall) is April (10mm).

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Average rainfall days in September
Kalmar, Sweden

Average rainfall days in September - Kalmar, Sweden
  • Average rainfall days in September: 10.3 days

The month with the highest number of rainy days is July (13.6 days).
The month with the least rainy days is February (6.9 days).

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Average snowfall in September
Kalmar, Sweden

Average snowfall in September - Kalmar, Sweden
  • Average snowfall in September: 0mm

The month with the highest snowfall is February (84mm).
Months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days in September
Kalmar, Sweden

Average snowfall days in September - Kalmar, Sweden
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (12.3 days).
Months with the least snowfall days are June, July, August and September (0 days).

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Average sea temperature in September
Kalmar, Sweden

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).

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Average daylight in September /
Average sunshine in September
Kalmar, Sweden

Average daylight in September / Average sunshine in September - Kalmar, Sweden
  • Average daylight in September: 12.7h

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

  • Average sunshine in September: 8.6h

The month with the most sunshine is August (Average sunshine: 10.4h).
The month with the least sunshine is February (Average sunshine: 3.2h).

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Average sunshine days in September
Kalmar, Sweden

Average sunshine days in September - Kalmar, Sweden
  • Average sunshine days in September: 16.8 days

The month with the most sunshine days is May (18.6 days).
The month with the least sunshine days is February (11.1 days).

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Average UV index in September
Kalmar, Sweden

Average UV index in September - Kalmar, Sweden
  • Average UV index in September: 4

Months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is January (UV index 1).

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Average cloud cover in September
Kalmar, Sweden

Average cloud cover in September - Kalmar, Sweden
  • Average cloud cover in September: 39

Months with the most cloud cover are January and February (Cloud cover 67).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in September
Kalmar, Sweden

Average visibility in September - Kalmar, Sweden
  • Average visibility in September: 10km

Months with the highest visibility are April, May, June, July, August, September and October (10km).
Months with the lowest visibility are January, February, March, November and December (9km).

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