September weather forecast and climate
Slommen, Sweden

Weather in September

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

Temperature

In September, the average high-temperature slightly decreases, from a pleasant 20.8°C (69.4°F) in August, to an enjoyable 16.7°C (62.1°F). In Slommen, in September, the average low-temperature is 11.3°C (52.3°F).

Humidity

The average relative humidity in September is 78%.

Rainfall

In Slommen, during September, the rain falls for 10.3 days and regularly aggregates up to 18mm (0.71") of precipitation. In Slommen, Sweden, during the entire year, the rain falls for 127.2 days and collects up to 299mm (11.77") of precipitation.

Snowfall

June through September are months without snowfall in Slommen.

Daylight

In Slommen, the average length of the day is 12.8h.

Sunshine

In September, the average sunshine in Slommen is 8.6h.

UV index

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 4 transform into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the average humidity in September in Slommen?

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

How many days does it rain in September in Slommen?

In Slommen, in September, it is raining for 10.3 days, with typically 18mm (0.71") of accumulated precipitation.

When it does not snow in Slommen?

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

Does it snow in Slommen in September?

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

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

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

How many hours of sunshine does Slommen have in September?

In September, the average sunshine is 8.6h.

How high is the UV index in September in Slommen?

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

Average temperature in September
Slommen, Sweden

Average temperature in September - Slommen, 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
Slommen, Sweden

Average pressure in September - Slommen, 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
Slommen, Sweden

Average wind speed in September - Slommen, 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
Slommen, Sweden

Average humidity in September - Slommen, 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
Slommen, Sweden

Average rainfall in September - Slommen, 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
Slommen, Sweden

Average rainfall days in September - Slommen, 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
Slommen, Sweden

Average snowfall in September - Slommen, 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
Slommen, Sweden

Average snowfall days in September - Slommen, 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 daylight in September /
Average sunshine in September
Slommen, Sweden

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

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
Slommen, Sweden

Average sunshine days in September - Slommen, 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
Slommen, Sweden

Average UV index in September - Slommen, 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
Slommen, Sweden

Average cloud cover in September - Slommen, 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
Slommen, Sweden

Average visibility in September - Slommen, 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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