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
A shift in the average high-temperature occurs in September in Lappeenranta, reducing from a pleasant 20.5°C (68.9°F) in August to a moderate 14.7°C (58.5°F). An average low-temperature of 8.5°C (47.3°F) is anticipated throughout the nights during September.Humidity
In September, the average relative humidity in Lappeenranta is 81%.Rainfall
In Lappeenranta, during September, the rain falls for 16 days and regularly aggregates up to 43mm (1.69") of precipitation. Throughout the year, in Lappeenranta, there are 150.8 rainfall days, and 525mm (20.67") of precipitation is accumulated.Snowfall
June through September are months without snowfall in Lappeenranta.Daylight
The average length of the day in September is 12h and 54min.On the first day of September, sunrise is at 06:00 and sunset at 20:13. On the last day of the month, sunrise is at 07:12 and sunset at 18:41 EEST.
Sunshine
The average sunshine in September is 6.6h.UV index
The average daily maximum UV index in September in Lappeenranta is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for the average person.Note: The UV index of 2 during September translates into the following guidance:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Frequently asked questions
What is the usual temperature for Lappeenranta in September?
What is the average humidity in September in Lappeenranta?
How much does it rain in Lappeenranta in September?
When it does not snow in Lappeenranta?
Does it snow in Lappeenranta in September?
What is the average length of the day in September in Lappeenranta?
When are sunrise and sunset in September in Lappeenranta?
How long on average sun shines in September in Lappeenranta?
How high is the UV index in September in Lappeenranta?
Average temperature in September
Lappeenranta, 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
Lappeenranta, 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
Lappeenranta, 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
Lappeenranta, 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
Lappeenranta, 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
Lappeenranta, 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
Lappeenranta, 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
Lappeenranta, 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
Lappeenranta, 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
Lappeenranta, 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
Lappeenranta, 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
Lappeenranta, 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
Lappeenranta, 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).
Lappeenranta, Finland
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