September weather forecast and climate
Valsta, Sweden

Weather in September

September, the first month of the autumn, in Valsta, is still a comfortable month, with temperature in the range of an average low of 9.2°C (48.6°F) and an average high of 16.4°C (61.5°F).

Temperature

In Valsta, the average high-temperature slightly decreases, from a pleasant 21.1°C (70°F) in August, to an enjoyable 16.4°C (61.5°F). In Valsta, in September, the average low-temperature is 9.2°C (48.6°F).

Humidity

The average relative humidity in Valsta is 79%.

Rainfall

In Valsta, during September, the rain falls for 13 days and regularly aggregates up to 29mm (1.14") of precipitation. In Valsta, during the entire year, the rain falls for 144.9 days and collects up to 400mm (15.75") of precipitation.

Snowfall

In Valsta snow does not fall in June through September.

Daylight

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

Sunshine

The average sunshine is 7.8h.

UV index

The average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for average individuals.
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 Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the average humidity in September in Valsta?

In September, the average relative humidity is 79%.

How much does it rain in Valsta in September?

In Valsta, in September, during 13 rainfall days, 29mm (1.14") of precipitation is typically accumulated.

When it does not snow in Valsta?

In Valsta snow does not fall in June through September.

Does it snow in Valsta in September?

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

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

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

How long on average sun shines in September in Valsta?

The average sunshine in September in Valsta, Sweden, is 7.8h.

What is the UV index intensity in September in Valsta?

In Valsta, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate health threat from unprotected exposure to the UV radiation.

Average temperature in September
Valsta, Sweden

Average temperature in September - Valsta, Sweden
  • Average high temperature in September: 16.4°C

The warmest month (with the highest average high temperature) is July (22.2°C).
The month with the lowest average high temperature is January (-0.8°C).

  • Average low temperature in September: 9.2°C

The month with the highest average low temperature is July (12.6°C).
The coldest months (with the lowest average low temperature) are January and February (-4.4°C).

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Average pressure in September
Valsta, Sweden

Average pressure in September - Valsta, Sweden
  • Average pressure in September: 1013.6mbar

The month with the highest atmospheric pressure is May (1014.6mbar).
The month with the lowest atmospheric pressure is December (1008.2mbar).

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Average wind speed in September
Valsta, Sweden

Average wind speed in September - Valsta, Sweden
  • Average wind speed in September: 12.2km/h

The windiest month (with the highest average wind speed) is December (13.7km/h).
The calmest month (with the lowest average wind speed) is August (11.1km/h).

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Average humidity in September
Valsta, Sweden

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

Months with the highest relative humidity are January, February and December (90%).
The month with the lowest relative humidity is May (69%).

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Average rainfall in September
Valsta, Sweden

Average rainfall in September - Valsta, Sweden
  • Average rainfall in September: 29mm

The wettest month (with the highest rainfall) is July (55mm).
The driest month (with the least rainfall) is April (18mm).

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Average rainfall days in September
Valsta, Sweden

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

Months with the highest number of rainy days are July and August (16.8 days).
The month with the least rainy days is February (5.7 days).

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Average snowfall in September
Valsta, Sweden

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

The month with the highest snowfall is January (121mm).
Months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days in September
Valsta, Sweden

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

The month with the highest number of snowfall days is January (12.8 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
Valsta, Sweden

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

The month with the longest days is June (Average daylight: 18.4h).
The month with the shortest days is December (Average daylight: 6.3h).

  • Average sunshine in September: 7.8h

The month with the most sunshine is June (Average sunshine: 12.1h).
The month with the least sunshine is December (Average sunshine: 3h).

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Average sunshine days in September
Valsta, Sweden

Average sunshine days in September - Valsta, Sweden
  • Average sunshine days in September: 13.9 days

Months with the most sunshine days are March and April (15.6 days).
The month with the least sunshine days is February (11.8 days).

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Average UV index in September
Valsta, Sweden

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

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
Valsta, Sweden

Average cloud cover in September - Valsta, Sweden
  • Average cloud cover in September: 48

The month with the most cloud cover is February (Cloud cover 68).
Months with the least cloud cover are June and August (Cloud cover 42).

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Average visibility in September
Valsta, Sweden

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

Months with the highest visibility are April, May, June, July, August and September (9km).
Months with the lowest visibility are January and February (7km).

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