September weather forecast
Trollhättan, Sweden

Weather in September

September, the first month of the autumn, in Trollhättan, is also a moderate month, with average temperature ranging between max 15.9°C (60.6°F) and min 9.7°C (49.5°F).

Temperature

In Trollhättan, the average high-temperature in September slightly decreases, from an enjoyable 19.7°C (67.5°F) in August, to a moderate 15.9°C (60.6°F). In September, the average low-temperature is 9.7°C (49.5°F).

Humidity

The average relative humidity in September is 80%.

Rainfall

In September, the rain falls for 14.8 days. Throughout September, 37mm (1.46") of precipitation is accumulated. Throughout the year, there are 170 rainfall days, and 502mm (19.76") of precipitation is accumulated.

Snowfall

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

Daylight

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

Sunshine

The average sunshine in Trollhättan is 7.7h.

UV index

In Trollhättan, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
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. 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 Trollhättan?

In September, the average relative humidity in Trollhättan is 80%.

How many days does it rain in September in Trollhättan?

In September, in Trollhättan, Sweden, the rain falls for 14.8 days. Throughout September, 37mm (1.46") of precipitation is accumulated.

When it does not snow in Trollhättan?

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

Does it snow in Trollhättan in September?

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

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

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

How long on average sun shines in September in Trollhättan?

In Trollhättan, the average sunshine in September is 7.7h.

How high is the UV index in September in Trollhättan?

In Trollhättan, Sweden, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV rays.

Average temperature in September
Trollhättan, Sweden

Average temperature in September - Trollhättan, Sweden
  • Average high temperature in September: 15.9°C

The warmest month (with the highest average high temperature) is July (20.8°C).
The month with the lowest average high temperature is January (0.6°C).

  • Average low temperature in September: 9.7°C

The month with the highest average low temperature is July (12.4°C).
The coldest month (with the lowest average low temperature) is February (-2.9°C).

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Average pressure in September
Trollhättan, Sweden

Average pressure in September - Trollhättan, Sweden
  • Average pressure in September: 1013.5mbar

Months with the highest atmospheric pressure are April and May (1014.4mbar).
The month with the lowest atmospheric pressure is December (1008.4mbar).

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Average wind speed in September
Trollhättan, Sweden

Average wind speed in September - Trollhättan, Sweden
  • Average wind speed in September: 13.5km/h

The windiest month (with the highest average wind speed) is December (14.9km/h).
The calmest months (with the lowest average wind speed) are June and July (12km/h).

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Average humidity in September
Trollhättan, Sweden

Average humidity in September - Trollhättan, Sweden
  • Average humidity in September: 80%

Months with the highest relative humidity are January, February, November and December (88%).
The month with the lowest relative humidity is May (71%).

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Average rainfall in September
Trollhättan, Sweden

Average rainfall in September - Trollhättan, Sweden
  • Average rainfall in September: 37mm

The wettest month (with the highest rainfall) is August (55mm).
The driest month (with the least rainfall) is April (22mm).

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Average rainfall days in September
Trollhättan, Sweden

Average rainfall days in September - Trollhättan, Sweden
  • Average rainfall days in September: 14.8 days

The month with the highest number of rainy days is August (18.9 days).
The month with the least rainy days is February (9.3 days).

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Average snowfall in September
Trollhättan, Sweden

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

The month with the highest snowfall is January (80mm).
Months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days in September
Trollhättan, Sweden

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

The month with the highest number of snowfall days is January (11.1 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
Trollhättan, Sweden

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

The month with the longest days is June (Average daylight: 18.2h).
The month with the shortest days is December (Average daylight: 6.5h).

  • Average sunshine in September: 7.7h

The month with the most sunshine is June (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 3.2h).

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Average sunshine days in September
Trollhättan, Sweden

Average sunshine days in September - Trollhättan, Sweden
  • Average sunshine days in September: 12.3 days

The month with the most sunshine days is April (15.6 days).
The month with the least sunshine days is December (9.5 days).

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Average UV index in September
Trollhättan, Sweden

Average UV index in September - Trollhättan, 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
Trollhättan, Sweden

Average cloud cover in September - Trollhättan, Sweden
  • Average cloud cover in September: 47

The month with the most cloud cover is February (Cloud cover 67).
The month with the least cloud cover is July (Cloud cover 41).

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Average visibility in September
Trollhättan, Sweden

Average visibility in September - Trollhättan, 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).

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