September weather forecast
Keminmaa, Finland

Weather in September

The first month of the autumn, September, is still a cool month in Keminmaa, Finland, with an average temperature fluctuating between 12.2°C (54°F) and 8.4°C (47.1°F).

Temperature

In Keminmaa, Finland, the average high-temperature in September slightly decreases from an enjoyable 16.5°C (61.7°F) in August to a cool 12.2°C (54°F). The average low-temperature, in September, is 8.4°C (47.1°F).

Humidity

The average relative humidity in September in Keminmaa, Finland, is 82%.

Rainfall

In Keminmaa, during September, the rain falls for 14.6 days and regularly aggregates up to 44mm (1.73") of precipitation. Throughout the year, in Keminmaa, there are 127 rainfall days, and 472mm (18.58") of precipitation is accumulated.

Snowfall

July through September are months without snowfall in Keminmaa, Finland.

Sea temperature

In Keminmaa, Finland, in September, the average water temperature is 12.8°C (55°F).
Note: At temperatures below 10°C (50°F), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 13°C (55.4°F) is not comfortable.

Daylight

The average length of the day in September in Keminmaa is 13h and 6min.
On the first day of September, sunrise is at 05:58 and sunset at 20:45. On the last day of the month, sunrise is at 07:29 and sunset at 18:54 EEST.

Sunshine

In September, the average sunshine is 7.1h.

UV index

In Keminmaa, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 3 in September interpret into the following advice:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the average humidity in September in Keminmaa?

In September, the average relative humidity in Keminmaa, Finland, is 82%.

How much does it rain in Keminmaa in September?

In Keminmaa, during September, the rain falls for 14.6 days and regularly aggregates up to 44mm (1.73") of precipitation.

When it does not snow in Keminmaa?

July through September are months without snowfall in Keminmaa.

Does it snow in Keminmaa in September?

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

What is the water temperature in September in Keminmaa?

In Keminmaa, in September, the average water temperature is 12.8°C (55°F). Swimming in 12.8°C (55°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Keminmaa have in September?

In September, the average day length in Keminmaa, Finland, is 13h and 6min.

What time are sunrise and sunset in September in Keminmaa?

On the first day of September in Keminmaa, Finland, sunrise is at 05:58 and sunset at 20:45. On the last day of the month, sunrise is at 07:29 and sunset at 18:54 EEST.

How many hours of sunshine does Keminmaa have in September?

In September, the average sunshine duration in Keminmaa is 7.1h.

What is the UV index intensity in September in Keminmaa?

The average daily maximum UV index in September in Keminmaa is 3. A UV Index value of 3 to 5 symbolizes a medium hazard to health from unsafe exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover

Average temperature in September
Keminmaa, Finland

Average temperature in September - Keminmaa, Finland
  • Average high temperature in September: 12.2°C

The warmest month (with the highest average high temperature) is July (17.8°C).
The month with the lowest average high temperature is January (-6.3°C).

  • Average low temperature in September: 8.4°C

The month with the highest average low temperature is July (12.6°C).
The coldest month (with the lowest average low temperature) is January (-10.7°C).

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Average pressure in September
Keminmaa, Finland

Average pressure in September - Keminmaa, Finland
  • Average pressure in September: 1011mbar

The month with the highest atmospheric pressure is May (1013.9mbar).
The month with the lowest atmospheric pressure is December (1004.9mbar).

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Average wind speed in September
Keminmaa, Finland

Average wind speed in September - Keminmaa, Finland
  • Average wind speed in September: 16.5km/h

The windiest month (with the highest average wind speed) is November (17.7km/h).
The calmest month (with the lowest average wind speed) is April (12.4km/h).

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Average humidity in September
Keminmaa, Finland

Average humidity in September - Keminmaa, Finland
  • Average humidity in September: 82%

The months with the highest relative humidity are January and February (94%).
The month with the lowest relative humidity is June (71%).

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Average rainfall in September
Keminmaa, Finland

Average rainfall in September - Keminmaa, Finland
  • Average rainfall in September: 44mm

The wettest month (with the highest rainfall) is August (53mm).
The driest month (with the least rainfall) is April (28mm).

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Average rainfall days in September
Keminmaa, Finland

Average rainfall days in September - Keminmaa, Finland
  • Average rainfall days in September: 14.6 days

The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is February (3.3 days).

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Average snowfall in September
Keminmaa, Finland

Average snowfall in September - Keminmaa, Finland
  • Average snowfall in September: 0mm

The month with the highest snowfall is March (228mm).
The months with the least snowfall are July, August and September (0mm).

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Average snowfall days in September
Keminmaa, Finland

Average snowfall days in September - Keminmaa, Finland
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (18.8 days).
The months with the least snowfall days are July, August and September (0 days).

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Average sea temperature in September
Keminmaa, Finland

Average sea temperature in September - Keminmaa, Finland
  • Average sea temperature in September: 12.8°C

The best month for swimming (with the highest average sea temperature) is July (16.8°C).
The coldest months (with the lowest average sea temperature) are January and February (-0.7°C).

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

Average daylight in September / Average sunshine in September - Keminmaa, Finland
  • Average daylight in September: 13h and 6min

The month with the longest days is July (Average daylight: 20h and 43min).
The month with the shortest days is December (Average daylight: 3h and 20min).

  • Average sunshine in September: 7h and 6min

The month with the most sunshine is July (Average sunshine: 12h and 18min).
The month with the least sunshine is December (Average sunshine: 1h and 6min).

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Average sunshine days in September
Keminmaa, Finland

Average sunshine days in September - Keminmaa, Finland
  • Average sunshine days in September: 12.6 days

The month with the most sunshine days is October (13.9 days).
The month with the least sunshine days is December (9.9 days).

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Average UV index in September
Keminmaa, Finland

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

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

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Average cloud cover in September
Keminmaa, Finland

Average cloud cover in September - Keminmaa, Finland
  • Average cloud cover in September: 52

The month with the most cloud cover is January (Cloud cover 73).
The month with the least cloud cover is July (Cloud cover 40).

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Average visibility in September
Keminmaa, Finland

Average visibility in September - Keminmaa, Finland
  • Average visibility in September: 9km

The months with the highest visibility are June, July and August (10km).
The months with the lowest visibility are January, February, March and April (7km).

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