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 decrease of average high-temperatures is mild in September, with a decline from a comfortable 19.1°C (66.4°F) in August to a mild 13.3°C (55.9°F). Nighttime temperatures in Merijärvi hover around an average low of 6.4°C (43.5°F) in September.Humidity
In September, the average relative humidity is 84%.Rainfall
In Merijärvi, during September, the rain falls for 12.1 days and regularly aggregates up to 28mm (1.1") of precipitation. In Merijärvi, during the entire year, the rain falls for 118.8 days and collects up to 391mm (15.39") of precipitation.Snowfall
June through September are months without snowfall in Merijärvi.Daylight
The average length of the day in September is 13h and 2min.On the first day of September, sunrise is at 06:05 and sunset at 20:38. On the last day of the month, sunrise is at 07:29 and sunset at 18:54 EEST.
Sunshine
The average sunshine in September is 6.2h.UV index
In September, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: A maximum high daily UV index of 3 during September translates into the following directions:
Heed the precautions - Suggestions to avoid sunburn are made. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
Frequently asked questions
What is the average September temperature in Merijärvi?
What is the average humidity in September in Merijärvi?
How much does it rain in Merijärvi in September?
When it does not snow in Merijärvi?
Does it snow in Merijärvi in September?
How many hours of daylight does Merijärvi have in September?
When is the sunrise / sunset in September in Merijärvi?
How long on average sun shines in September in Merijärvi?
What is the UV index intensity in September in Merijärvi?
Average temperature in September
Merijärvi, Finland
- Average high temperature in September: 13.3°C
The warmest month (with the highest average high temperature) is July (21°C).
The month with the lowest average high temperature is January (-5.8°C).
- Average low temperature in September: 6.4°C
The month with the highest average low temperature is July (11.4°C).
The coldest month (with the lowest average low temperature) is January (-10°C).
Average pressure in September
Merijärvi, Finland
- Average pressure in September: 1011.8mbar
The month with the highest atmospheric pressure is May (1014.2mbar).
The month with the lowest atmospheric pressure is December (1006mbar).
Average wind speed in September
Merijärvi, Finland
- Average wind speed in September: 10.2km/h
The windiest month (with the highest average wind speed) is December (11.5km/h).
The calmest month (with the lowest average wind speed) is July (8.9km/h).
Average humidity in September
Merijärvi, Finland
- Average humidity in September: 84%
The month with the highest relative humidity is January (96%).
The month with the lowest relative humidity is June (67%).
Average rainfall in September
Merijärvi, Finland
- Average rainfall in September: 28mm
The wettest month (with the highest rainfall) is July (49mm).
The driest month (with the least rainfall) is April (23mm).
Average rainfall days in September
Merijärvi, Finland
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is July (15.5 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Merijärvi, Finland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (200mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Merijärvi, Finland
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (21.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Merijärvi, Finland
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 0min).
The month with the shortest days is December (Average daylight: 4h and 18min).
- Average sunshine in September: 6h and 1min
The month with the most sunshine is June (Average sunshine: 11h and 36min).
The month with the least sunshine is December (Average sunshine: 0h and 54min).
Average sunshine days in September
Merijärvi, Finland
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is May (17.2 days).
The month with the least sunshine days is December (8.5 days).
Average UV index in September
Merijärvi, 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, February, March, November and December (UV index 1).
Average cloud cover in September
Merijärvi, Finland
- Average cloud cover in September: 61
The month with the most cloud cover is January (Cloud cover 80).
The month with the least cloud cover is June (Cloud cover 47).
Average visibility in September
Merijärvi, Finland
- Average visibility in September: 7km
The months with the highest visibility are May, June and July (9km).
The months with the lowest visibility are January and February (5km).
Merijärvi, Finland
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