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
September
Weather in September
Temperature
The shift to September brings a decrease in the average high-temperature, falling from an enjoyable 17.5°C (63.5°F) in August to a fresh 11.8°C (53.2°F). In September, Iivantiira's temperature tends to fall to an average low of 5.6°C (42.1°F) during the night.Humidity
The average relative humidity in September is 86%.Rainfall
In September, the rain falls for 16.6 days. Throughout September, 46mm (1.81") of precipitation is accumulated. In Iivantiira, during the entire year, the rain falls for 125.2 days and collects up to 497mm (19.57") of precipitation.Snowfall
January through June, September through December are months with snowfall in Iivantiira. September is the first month it typically snows in Iivantiira. Throughout September, in the average 0.8 snowfall days, it receives 6mm (0.24") of snow. Throughout the year, there are 147.9 snowfall days, and 1578mm (62.13") of snow is accumulated.Daylight
The average length of the day in September is 13h and 2min.On the first day of September, sunrise is at 05:44 and sunset at 20:18. On the last day of the month, sunrise is at 07:09 and sunset at 18:33 EEST.
Sunshine
In Iivantiira, the average sunshine in September is 5.4h.UV index
In Iivantiira, the average daily maximum UV index in September is 2. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for average individuals.Note: In September, the maximum UV index of 2 transforms into these recommendations:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. To protect against the Sun's most potent rays, avoid direct exposure around midday. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Iivantiira in September?
What is the average humidity in September in Iivantiira?
How many days does it rain in September in Iivantiira?
When does it start snowing in Iivantiira?
What is the average length of the day in September in Iivantiira?
When is the sunrise / sunset in September in Iivantiira?
How long on average sun shines in September in Iivantiira?
What is the UV index reading in September in Iivantiira?
Average temperature in September
Iivantiira, Finland
- Average high temperature in September: 11.8°C
The warmest month (with the highest average high temperature) is July (20.1°C).
The month with the lowest average high temperature is January (-8°C).
- Average low temperature in September: 5.6°C
The month with the highest average low temperature is July (10.8°C).
The coldest month (with the lowest average low temperature) is January (-12.8°C).
Average pressure in September
Iivantiira, Finland
- Average pressure in September: 1011.7mbar
The month with the highest atmospheric pressure is May (1014.4mbar).
The month with the lowest atmospheric pressure is December (1006.7mbar).
Average wind speed in September
Iivantiira, Finland
- Average wind speed in September: 11.4km/h
The windiest month (with the highest average wind speed) is November (12.4km/h).
The calmest month (with the lowest average wind speed) is July (10km/h).
Average humidity in September
Iivantiira, Finland
- Average humidity in September: 86%
The months with the highest relative humidity are January, February and December (96%).
The month with the lowest relative humidity is June (69%).
Average rainfall in September
Iivantiira, Finland
- Average rainfall in September: 46mm
The wettest month (with the highest rainfall) is July (58mm).
The driest month (with the least rainfall) is February (30mm).
Average rainfall days in September
Iivantiira, Finland
- Average rainfall days in September: 16.6 days
The month with the highest number of rainy days is July (19.3 days).
The month with the least rainy days is February (1.7 days).
Average snowfall in September
Iivantiira, Finland
- Average snowfall in September: 6mm
The month with the highest snowfall is December (280mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Iivantiira, Finland
- Average snowfall days in September: 0.8 days
The month with the highest number of snowfall days is December (25.5 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Iivantiira, Finland
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 6min).
The month with the shortest days is December (Average daylight: 4h and 12min).
- Average sunshine in September: 5h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 0h and 30min).
Average sunshine days in September
Iivantiira, Finland
- Average sunshine days in September: 10 days
The month with the most sunshine days is May (11.8 days).
The month with the least sunshine days is December (5.9 days).
Average UV index in September
Iivantiira, Finland
- Average UV index in September: 2
The months with the highest UV index are May, June, July and August (UV index 4).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).
Average cloud cover in September
Iivantiira, Finland
- Average cloud cover in September: 67
The months with the most cloud cover are January and December (Cloud cover 85).
The month with the least cloud cover is July (Cloud cover 49).
Average visibility in September
Iivantiira, Finland
- Average visibility in September: 7km
The months with the highest visibility are June and July (9km).
The months with the lowest visibility are January, February, March and December (5km).
