September weather forecast
Jyväskylä, Finland

Weather in September

September, the first month of the autumn, in Jyväskylä, is still a mild month, with average temperature varying between 7.1°C (44.8°F) and 13.6°C (56.5°F).

Temperature

In Jyväskylä, the average high-temperature decreases, from a comfortable 19.8°C (67.6°F) in August, to a mild 13.6°C (56.5°F). The average low-temperature, in Jyväskylä, is 7.1°C (44.8°F).

Humidity

In Jyväskylä, Finland, the average relative humidity in September is 83%.

Rainfall

In Jyväskylä, during September, the rain falls for 13.2 days and regularly aggregates up to 34mm (1.34") of precipitation. In Jyväskylä, during the entire year, the rain falls for 121.2 days and collects up to 403mm (15.87") of precipitation.

Snowfall

Months with snowfall in Jyväskylä are January through June, September through December. September is the first month it typically snows. Throughout September, in the average 0.3 snowfall days, it receives 2mm (0.08") of snow. Throughout the year, there are 96 snowfall days, and 932mm (36.69") of snow is accumulated.

Daylight

In September, the average length of the day is 13h.

Sunshine

In September, the average sunshine is 6.3h.

UV index

The average daily maximum UV index in September is 3. A UV Index reading of 3 to 5 represents a medium health hazard from the exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily maximum UV index of 3 interpret into the following advice:
Take precautions - Protection against sun damage is advised. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the average humidity in September in Jyväskylä?

The average relative humidity in September is 83%.

How much does it rain in Jyväskylä in September?

In Jyväskylä, during September, the rain falls for 13.2 days and regularly aggregates up to 34mm (1.34") of precipitation.

When does it start snowing in Jyväskylä?

September is the first month it typically snows in Jyväskylä, Finland. Throughout September, in the average 0.3 snowfall days, it receives 2mm (0.08") of snow.

How many hours of daylight does Jyväskylä have in September?

In September, the average length of the day is 13h.

How long on average sun shines in September in Jyväskylä?

In September, the average sunshine in Jyväskylä, Finland, is 6.3h.

What is the UV index reading in September in Jyväskylä?

The average daily maximum UV index in September in Jyväskylä, Finland, is 3. A UV Index value of 3 to 5 symbolizes a medium hazard to health from the exposure to the Sun's UV rays.

Average temperature in September
Jyväskylä, Finland

Average temperature in September - Jyväskylä, Finland
  • Average high temperature in September: 13.6°C

The warmest month (with the highest average high temperature) is July (21.5°C).
The month with the lowest average high temperature is January (-5.5°C).

  • Average low temperature in September: 7.1°C

The month with the highest average low temperature is July (12.2°C).
The coldest month (with the lowest average low temperature) is January (-9.7°C).

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Average pressure in September
Jyväskylä, Finland

Average pressure in September - Jyväskylä, Finland
  • Average pressure in September: 1012.8mbar

The month with the highest atmospheric pressure is May (1014.5mbar).
The month with the lowest atmospheric pressure is December (1007.6mbar).

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Average wind speed in September
Jyväskylä, Finland

Average wind speed in September - Jyväskylä, Finland
  • Average wind speed in September: 10.9km/h

The windiest month (with the highest average wind speed) is December (12.5km/h).
The calmest month (with the lowest average wind speed) is July (9.6km/h).

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Average humidity in September
Jyväskylä, Finland

Average humidity in September - Jyväskylä, Finland
  • Average humidity in September: 83%

Months with the highest relative humidity are January and February (95%).
The month with the lowest relative humidity is May (67%).

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Average rainfall in September
Jyväskylä, Finland

Average rainfall in September - Jyväskylä, Finland
  • Average rainfall in September: 34mm

The wettest month (with the highest rainfall) is July (50mm).
The driest months (with the least rainfall) are February and March (23mm).

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Average rainfall days in September
Jyväskylä, Finland

Average rainfall days in September - Jyväskylä, Finland
  • Average rainfall days in September: 13.2 days

The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (2.3 days).

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Average snowfall in September
Jyväskylä, Finland

Average snowfall in September - Jyväskylä, Finland
  • Average snowfall in September: 2mm

The month with the highest snowfall is December (185mm).
Months with the least snowfall are July and August (0mm).

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Average snowfall days in September
Jyväskylä, Finland

Average snowfall days in September - Jyväskylä, Finland
  • Average snowfall days in September: 0.3 days

The month with the highest number of snowfall days is December (19.3 days).
Months with the least snowfall days are July and August (0 days).

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Average daylight in September /
Average sunshine in September
Jyväskylä, Finland

Average daylight in September / Average sunshine in September - Jyväskylä, Finland
  • Average daylight in September: 13h

The month with the longest days is June (Average daylight: 19.7h).
The month with the shortest days is December (Average daylight: 5.3h).

  • Average sunshine in September: 6.3h

The month with the most sunshine is June (Average sunshine: 11.5h).
The month with the least sunshine is December (Average sunshine: 0.8h).

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Average sunshine days in September
Jyväskylä, Finland

Average sunshine days in September - Jyväskylä, Finland
  • Average sunshine days in September: 14 days

The month with the most sunshine days is May (16.3 days).
The month with the least sunshine days is December (9.6 days).

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Average UV index in September
Jyväskylä, Finland

Average UV index in September - Jyväskylä, Finland
  • Average UV index in September: 3

The month with the highest UV index is July (UV index 5).
Months with the lowest UV index are January, February, March, November and December (UV index 1).

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Average cloud cover in September
Jyväskylä, Finland

Average cloud cover in September - Jyväskylä, Finland
  • Average cloud cover in September: 58

The month with the most cloud cover is January (Cloud cover 83).
Months with the least cloud cover are July and August (Cloud cover 45).

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Average visibility in September
Jyväskylä, Finland

Average visibility in September - Jyväskylä, Finland
  • Average visibility in September: 8km

Months with the highest visibility are May, June, July and August (9km).
Months with the lowest visibility are January and February (5km).

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