September weather forecastVaisaari, Finland
September
Weather in September
The first month of the autumn, September, is still a mild month in Vaisaari, Finland, with an average temperature fluctuating between 15.3°C (59.5°F) and 10.2°C (50.4°F).Temperature
The arrival of September corresponds with a minor reduction in the average high-temperature, down from August's refreshing 19.7°C (67.5°F) to a mild 15.3°C (59.5°F). During the month of September, an average temperature of 10.2°C (50.4°F) is noted during the nights.Humidity
In Vaisaari, the average relative humidity in September is 79%.Rainfall
In Vaisaari, in September, it is raining for 13.6 days, with typically 36mm (1.42") of accumulated precipitation. Throughout the year, there are 133.7 rainfall days, and 390mm (15.35") of precipitation is accumulated.Snowfall
In Vaisaari, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 53min.On the first day of the month, sunrise is at 06:26 and sunset at 20:35. On the last day of September, sunrise is at 07:36 and sunset at 19:06 EEST.
Sunshine
The average sunshine in September is 7.7h.UV index
The average daily maximum UV index in September in Vaisaari, Finland, is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the average person.Note: An average UV index of 3 in September transforms into this advice:
Guard yourself - An obligation to protect skin and eyes from harm exists. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Vaisaari, Finland
- Average high temperature in September: 15.3°C
The warmest month (with the highest average high temperature) is July (20.4°C).
The month with the lowest average high temperature is January (-1.9°C).
- Average low temperature in September: 10.2°C
The months with the highest average low temperature are July and August (13.8°C).
The coldest month (with the lowest average low temperature) is February (-5.6°C).
Average pressure in September
Vaisaari, Finland
- Average pressure in September: 1013.2mbar
The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1007.6mbar).
Average wind speed in September
Vaisaari, Finland
- Average wind speed in September: 15.8km/h
The windiest month (with the highest average wind speed) is December (20.4km/h).
The calmest month (with the lowest average wind speed) is July (13.9km/h).
Average humidity in September
Vaisaari, Finland
- Average humidity in September: 79%
The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is May (71%).
Average rainfall in September
Vaisaari, Finland
- Average rainfall in September: 36mm
The wettest month (with the highest rainfall) is July (49mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days in September
Vaisaari, Finland
- Average rainfall days in September: 13.6 days
The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is February (5.2 days).
Average snowfall in September
Vaisaari, Finland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (103mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Vaisaari, Finland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Vaisaari, Finland
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).
- Average sunshine in September: 7h and 42min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 2h and 0min).
Average sunshine days in September
Vaisaari, Finland
- Average sunshine days in September: 13.2 days
The month with the most sunshine days is May (17.2 days).
The month with the least sunshine days is December (9.6 days).
Average UV index in September
Vaisaari, Finland
- Average UV index in September: 3
The months with the highest UV index are June, July and August (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
Vaisaari, Finland
- Average cloud cover in September: 44
The month with the most cloud cover is December (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility in September
Vaisaari, Finland
- Average visibility in September: 10km
The months with the highest visibility are May, June, July, August and September (10km).
The months with the lowest visibility are February and March (8km).
