September weather forecast and climate
Merlänna, Sweden

The first month of the autumn, September, is still a comfortable month in Merlänna, Sweden, with average temperature ranging between min 9.2°C (48.6°F) and max 16.3°C (61.3°F).

Temperature

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

Humidity

The average relative humidity in Merlänna is 79%.

Rainfall

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

Snowfall

In Merlänna snow does not fall in June through September.

Daylight

The average length of the day in September is 12.8h.

Sunshine

In Merlänna, Sweden, the average sunshine is 8h.

UV index

The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV rays for the ordinary person.
Note: In September, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. 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 Merlänna?

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 Merlänna?

In September, the average relative humidity is 79%.

How much does it rain in Merlänna in September?

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

Does it snow in Merlänna in September?

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

When it does not snow in Merlänna?

June through September are months without snowfall in Merlänna.

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

The average length of the day in September is 12.8h.

How long on average sun shines in September in Merlänna?

In September, the average sunshine in Merlänna, Sweden, is 8h.

What is the UV index intensity in September in Merlänna?

In September, the average daily maximum UV index in Merlänna is 3. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe exposure to the Sun's UV rays.
Average temperature in September - Merlänna, 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 - Merlänna, 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 - Merlänna, 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 - Merlänna, 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 - Merlänna, 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 - Merlänna, 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 - Merlänna, 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 - Merlänna, 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 - Merlänna, 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 - Merlänna, 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 - Merlänna, 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 - Merlänna, 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 - Merlänna, 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).