Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The shift from August to September involves a decrease in the average high-temperature, dropping from a pleasant 20.5°C (68.9°F) to a moderate 14.7°C (58.5°F). An average low-temperature of 8.5°C (47.3°F) marks the nights throughout September.Humidity
The average relative humidity in September in Luumäki is 81%.Rainfall
In September, the rain falls for 16 days. Throughout September, 43mm (1.69") of precipitation is accumulated. In Luumäki, Finland, during the entire year, the rain falls for 150.8 days and collects up to 525mm (20.67") of precipitation.Snowfall
June through September are months without snowfall in Luumäki.Daylight
The average length of the day in September in Luumäki is 12h and 54min.On the first day of September in Luumäki, Finland, sunrise is at 06:03 and sunset at 20:15. On the last day of the month, sunrise is at 07:14 and sunset at 18:44 EEST.
Sunshine
In September, the average sunshine is 6.6h.UV index
The average daily maximum UV index in September in Luumäki is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: A maximum daily UV index of 2 during September morphs into the following directions:
Prolonged exposure to sunlight rarely troubles the majority, but constant protection is vital for babies, children, and fair-skinned people. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Take heed! The reflection of snow can intensify the Sun's UV radiation nearly double.
Frequently asked questions
What is the average September temperature in Luumäki?
What is the average humidity in September in Luumäki?
How much does it rain in Luumäki in September?
When it does not snow in Luumäki?
Does it snow in Luumäki in September?
How many hours of daylight does Luumäki have in September?
When is the sunrise / sunset in September in Luumäki?
How long on average sun shines in September in Luumäki?
How high is the UV index in September in Luumäki?
Average temperature in September
Luumäki, Finland
- Average high temperature in September: 14.7°C
The warmest month (with the highest average high temperature) is July (22.3°C).
The month with the lowest average high temperature is January (-4.7°C).
- Average low temperature in September: 8.5°C
The month with the highest average low temperature is July (13.3°C).
The coldest month (with the lowest average low temperature) is January (-8.6°C).
Average pressure in September
Luumäki, Finland
- Average pressure in September: 1013.3mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1008.9mbar).
Average wind speed in September
Luumäki, Finland
- Average wind speed in September: 11.4km/h
The windiest month (with the highest average wind speed) is December (13.7km/h).
The calmest months (with the lowest average wind speed) are July and August (10.6km/h).
Average humidity in September
Luumäki, Finland
- Average humidity in September: 81%
The month with the highest relative humidity is February (95%).
The month with the lowest relative humidity is May (66%).
Average rainfall in September
Luumäki, Finland
- Average rainfall in September: 43mm
The wettest month (with the highest rainfall) is August (53mm).
The driest month (with the least rainfall) is April (32mm).
Average rainfall days in September
Luumäki, Finland
- Average rainfall days in September: 16 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in September
Luumäki, Finland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (262mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Luumäki, Finland
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is January (22.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Luumäki, Finland
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 19h and 6min).
The month with the shortest days is December (Average daylight: 5h and 42min).
- Average sunshine in September: 6h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 0h and 54min).
Average sunshine days in September
Luumäki, Finland
- Average sunshine days in September: 8.9 days
The month with the most sunshine days is May (14.3 days).
The month with the least sunshine days is December (4.7 days).
Average UV index in September
Luumäki, Finland
- Average UV index in September: 2
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
Luumäki, Finland
- Average cloud cover in September: 56
The month with the most cloud cover is February (Cloud cover 84).
The months with the least cloud cover are July and August (Cloud cover 42).
Average visibility in September
Luumäki, Finland
- Average visibility in September: 8km
The months with the highest visibility are May, June, July and August (9km).
The months with the lowest visibility are January and February (5km).
Luumäki, Finland
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