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
With September's arrival, Karttula's weather changes as the average high-temperature falls from an enjoyable 19.3°C (66.7°F) in August to a mild 13.6°C (56.5°F). An average low-temperature of 7.9°C (46.2°F) is recorded in the month of September.Humidity
In September, the average relative humidity in Karttula is 82%.Rainfall
In Karttula, in September, it is raining for 12.5 days, with typically 25mm (0.98") of accumulated precipitation. Throughout the year, in Karttula, there are 106.5 rainfall days, and 384mm (15.12") of precipitation is accumulated.Snowfall
January through June, September through December are months with snowfall in Karttula. September is the first month it typically snows in Karttula, Finland. Throughout September, in the average 0.3 snowfall days, it receives 2mm (0.08") of snow. Throughout the year, there are 110.8 snowfall days, and 1074mm (42.28") of snow is accumulated.Daylight
The average length of the day in September in Karttula, Finland, is 12h and 58min.On the first day of the month, sunrise is at 06:00 and sunset at 20:23. On the last day of September, sunrise is at 07:18 and sunset at 18:45 EEST.
Sunshine
In Karttula, the average sunshine in September is 6.4h.UV index
In Karttula, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The UV index of 3 in September translates into these instructions:
Take precautions - Protection against sun damage is advised. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Karttula in September?
What is the average humidity in September in Karttula?
How many days does it rain in September in Karttula?
When does it start to snow in Karttula?
What is the average length of the day in September in Karttula?
When is the sunrise / sunset in September in Karttula?
How long on average sun shines in September in Karttula?
How high is the UV index in September in Karttula?
Average temperature in September
Karttula, Finland
- Average high temperature in September: 13.6°C
The warmest month (with the highest average high temperature) is July (20.9°C).
The month with the lowest average high temperature is January (-5.8°C).
- Average low temperature in September: 7.9°C
The month with the highest average low temperature is July (12.9°C).
The coldest month (with the lowest average low temperature) is January (-9.9°C).
Average pressure in September
Karttula, Finland
- Average pressure in September: 1012.7mbar
The month with the highest atmospheric pressure is May (1014.5mbar).
The month with the lowest atmospheric pressure is December (1008mbar).
Average wind speed in September
Karttula, Finland
- Average wind speed in September: 13km/h
The windiest month (with the highest average wind speed) is November (15km/h).
The calmest month (with the lowest average wind speed) is July (10.9km/h).
Average humidity in September
Karttula, Finland
- Average humidity in September: 82%
The months with the highest relative humidity are January and February (95%).
The month with the lowest relative humidity is June (68%).
Average rainfall in September
Karttula, Finland
- Average rainfall in September: 25mm
The wettest month (with the highest rainfall) is July (48mm).
The driest month (with the least rainfall) is April (23mm).
Average rainfall days in September
Karttula, Finland
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (13.7 days).
The month with the least rainy days is February (3.1 days).
Average snowfall in September
Karttula, Finland
- Average snowfall in September: 2mm
The month with the highest snowfall is January (230mm).
The months with the least snowfall are July and August (0mm).
Average snowfall days in September
Karttula, Finland
- Average snowfall days in September: 0.3 days
The month with the highest number of snowfall days is January (23.2 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in September /
Average sunshine in September
Karttula, Finland
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 20h and 0min).
The month with the shortest days is December (Average daylight: 5h and 0min).
- Average sunshine in September: 6h and 2min
The month with the most sunshine is June (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 0h and 48min).
Average sunshine days in September
Karttula, Finland
- Average sunshine days in September: 15.3 days
The month with the most sunshine days is May (19.3 days).
The month with the least sunshine days is February (7.3 days).
Average UV index in September
Karttula, 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
Karttula, Finland
- Average cloud cover in September: 58
The months with the most cloud cover are January and February (Cloud cover 82).
The month with the least cloud cover is July (Cloud cover 42).
Average visibility in September
Karttula, Finland
- Average visibility in September: 9km
The month with the highest visibility is June (10km).
The month with the lowest visibility is February (5km).
