September weather forecast and climate
Stallarholmen, Sweden

September, the first month of the autumn, in Stallarholmen, is still a comfortable month, with average temperature varying between 9.2°C (48.6°F) and 16.3°C (61.3°F).

Temperature

In Stallarholmen, the average high-temperature in September marginally drops, from a pleasant 20.9°C (69.6°F) in August, to a comfortable 16.3°C (61.3°F). In Stallarholmen, Sweden, in September, the average low-temperature is 9.2°C (48.6°F).

Humidity

In Stallarholmen, the average relative humidity in September is 79%.

Rainfall

In Stallarholmen, during September, the rain falls for 13.2 days and regularly aggregates up to 27mm (1.06") of precipitation. Throughout the year, there are 148.3 rainfall days, and 400mm (15.75") of precipitation is accumulated.

Snowfall

June through September are months without snowfall in Stallarholmen.

Daylight

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

Sunshine

In September, the average sunshine is 8h.

UV index

In September, the average daily maximum UV index in Stallarholmen is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from the exposure to the Sun's UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 Stallarholmen?

In September, the average high-temperature is 16.3°C (61.3°F), and the average low-temperature is 9.2°C (48.6°F).

What is the average humidity in September in Stallarholmen?

In September, the average relative humidity is 79%.

How many days does it rain in September in Stallarholmen?

In Stallarholmen, during September, the rain falls for 13.2 days and regularly aggregates up to 27mm (1.06") of precipitation.

Does it snow in Stallarholmen in September?

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

When it does not snow in Stallarholmen?

In Stallarholmen snow does not fall in June through September.

How many hours of daylight does Stallarholmen have in September?

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

How many hours of sunshine does Stallarholmen have in September?

The average sunshine in September is 8h.

What is the UV index reading in September in Stallarholmen?

The average daily maximum UV index in September in Stallarholmen is 3. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to the UV radiation.
Average temperature in September - Stallarholmen, Sweden
  • Average high temperature in September: 16.3°C

The warmest month (with the highest average high temperature) is July (22°C).
The month with the lowest average high temperature is January (-0.9°C).

  • Average low temperature in September: 9.2°C

The month with the highest average low temperature is July (12.7°C).
The coldest months (with the lowest average low temperature) are January and February (-4.7°C).

Average pressure in September - Stallarholmen, Sweden
  • Average pressure in September: 1013.4mbar

The month with the highest atmospheric pressure is May (1014.7mbar).
The month with the lowest atmospheric pressure is December (1007.9mbar).

Average wind speed in September - Stallarholmen, Sweden
  • Average wind speed in September: 12.7km/h

The windiest month (with the highest average wind speed) is December (15.9km/h).
The calmest month (with the lowest average wind speed) is August (11.5km/h).

Average humidity in September - Stallarholmen, Sweden
  • Average humidity in September: 79%

Months with the highest relative humidity are January, February and December (89%).
The month with the lowest relative humidity is May (70%).

Average rainfall in September - Stallarholmen, Sweden
  • Average rainfall in September: 27mm

The wettest month (with the highest rainfall) is July (48mm).
The driest month (with the least rainfall) is April (19mm).

Average rainfall days in September - Stallarholmen, Sweden
  • Average rainfall days in September: 13.2 days

The month with the highest number of rainy days is July (16.3 days).
The month with the least rainy days is February (6.7 days).

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

The month with the highest snowfall is February (102mm).
Months with the least snowfall are June, July, August and September (0mm).

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

The month with the highest number of snowfall days is January (14.6 days).
Months with the least snowfall days are June, July, August and September (0 days).

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

The month with the longest days is June (Average daylight: 18.5h).
The month with the shortest days is December (Average daylight: 6.2h).

  • Average sunshine in September: 8h

The month with the most sunshine is June (Average sunshine: 12h).
The month with the least sunshine is December (Average sunshine: 2.5h).

Average sunshine days in September - Stallarholmen, Sweden
  • Average sunshine days in September: 14.2 days

Months with the most sunshine days are September and October (14.2 days).
The month with the least sunshine days is December (10.5 days).

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

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

Average cloud cover in September - Stallarholmen, Sweden
  • Average cloud cover in September: 45

The month with the most cloud cover is February (Cloud cover 66).
The month with the least cloud cover is July (Cloud cover 41).

Average visibility in September - Stallarholmen, Sweden
  • Average visibility in September: 9km

Months with the highest visibility are April, May, June, July, August, September and October (9km).
Months with the lowest visibility are January, February, March, November and December (8km).