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
Transition from August to September is accompanied by a temperature drop, with average high-temperatures decreasing from a refreshing 17.8°C (64°F) to a cool 12.1°C (53.8°F). Kostomuksha reports a consistent average low-temperature of 5.9°C (42.6°F) throughout September nights.Humidity
In September, the average relative humidity is 84%.Rainfall
In Kostomuksha, in September, it is raining for 14.1 days, with typically 29mm (1.14") of accumulated precipitation. Throughout the year, in Kostomuksha, Russia, there are 110.6 rainfall days, and 413mm (16.26") of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall in Kostomuksha. September is the first month it typically snows in Kostomuksha. Throughout September, in the average 0.8 snowfall days, it receives 6mm (0.24") of snow. In Kostomuksha, during the entire year, snow falls for 132.7 days and aggregates up to 1296mm (51.02") of snow.Daylight
In Kostomuksha, the average length of the day in September is 13h and 2min.On the first day of September, sunrise is at 05:39 and sunset at 20:14. On the last day of the month, sunrise is at 07:05 and sunset at 18:29 MSK.
Sunshine
In Kostomuksha, the average sunshine in September is 5.3h.UV index
In Kostomuksha, the average daily maximum UV index in September is 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index of 2 in September interprets into the following recommendations:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
Frequently asked questions
What is the temperature in September in Kostomuksha?
What is the average humidity in September in Kostomuksha?
How much does it rain in Kostomuksha in September?
When does it start to snow in Kostomuksha?
How many hours of daylight does Kostomuksha have in September?
What time are sunrise and sunset in September in Kostomuksha?
How long on average sun shines in September in Kostomuksha?
How high is the UV index in September in Kostomuksha?
Average temperature in September
Kostomuksha, Russia
- Average high temperature in September: 12.1°C
The warmest month (with the highest average high temperature) is July (20.3°C).
The month with the lowest average high temperature is January (-7.9°C).
- Average low temperature in September: 5.9°C
The month with the highest average low temperature is July (11.3°C).
The coldest month (with the lowest average low temperature) is January (-13°C).
Average pressure in September
Kostomuksha, Russia
- Average pressure in September: 1012mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1006.9mbar).
Average wind speed in September
Kostomuksha, Russia
- Average wind speed in September: 11.6km/h
The windiest month (with the highest average wind speed) is November (12.7km/h).
The calmest month (with the lowest average wind speed) is July (10.3km/h).
Average humidity in September
Kostomuksha, Russia
- Average humidity in September: 84%
The months with the highest relative humidity are January and February (96%).
The month with the lowest relative humidity is June (68%).
Average rainfall in September
Kostomuksha, Russia
- Average rainfall in September: 29mm
The wettest month (with the highest rainfall) is July (55mm).
The driest months (with the least rainfall) are February and March (24mm).
Average rainfall days in September
Kostomuksha, Russia
- Average rainfall days in September: 14.1 days
The month with the highest number of rainy days is July (16.8 days).
The month with the least rainy days is January (1.6 days).
Average snowfall in September
Kostomuksha, Russia
- Average snowfall in September: 6mm
The month with the highest snowfall is December (251mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Kostomuksha, Russia
- Average snowfall days in September: 0.8 days
The month with the highest number of snowfall days is December (23.3 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Kostomuksha, Russia
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 21h and 12min).
The month with the shortest days is December (Average daylight: 4h and 6min).
- Average sunshine in September: 5h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 0h and 42min).
Average sunshine days in September
Kostomuksha, Russia
- Average sunshine days in September: 12.3 days
The month with the most sunshine days is June (14.4 days).
The month with the least sunshine days is December (8.1 days).
Average UV index in September
Kostomuksha, Russia
- Average UV index in September: 2
The month with the highest UV index is July (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 1).
Average cloud cover in September
Kostomuksha, Russia
- Average cloud cover in September: 63
The month with the most cloud cover is February (Cloud cover 85).
The month with the least cloud cover is July (Cloud cover 47).
Average visibility in September
Kostomuksha, Russia
- Average visibility in September: 8km
The month with the highest visibility is June (10km).
The months with the lowest visibility are January and February (5km).
Kostomuksha, Russia
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