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
As September commences, the average high-temperature shows a reduction, transitioning from an agreeable 20.3°C (68.5°F) in August to a mild 14.8°C (58.6°F). During September nights, Orimattila records an average temperature of 7.6°C (45.7°F).Humidity
In September, the average relative humidity is 83%.Rainfall
In Orimattila, Finland, in September, during 10.6 rainfall days, 27mm (1.06") of precipitation is typically accumulated. Throughout the year, in Orimattila, there are 118.1 rainfall days, and 394mm (15.51") of precipitation is accumulated.Snowfall
Months with snowfall in Orimattila are January through May, September through December. September is the first month it typically snows in Orimattila. Throughout September, in the average 0.1 snowfall days, it receives 1mm (0.04") of snow. In Orimattila, during the entire year, snow falls for 93.7 days and aggregates up to 918mm (36.14") of snow.Daylight
The average length of the day in September in Orimattila, Finland, is 12h and 53min.On the first day of September in Orimattila, sunrise is at 06:11 and sunset at 20:22. On the last day of the month, sunrise is at 07:22 and sunset at 18:51 EEST.
Sunshine
In September, the average sunshine is 6.6h.UV index
The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum UV index of 3 during September leads to these instructions:
Take necessary precautions - Defending against sun damage is advocated. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Experience reduced UV exposure by about half when donning a wide-brim hat. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Orimattila?
What is the average humidity in September in Orimattila?
How many days does it rain in September in Orimattila?
When does it start to snow in Orimattila?
How many hours of daylight does Orimattila have in September?
When are sunrise and sunset in September in Orimattila?
How many hours of sunshine does Orimattila have in September?
What is the UV index reading in September in Orimattila?
Average temperature in September
Orimattila, Finland
- Average high temperature in September: 14.8°C
The warmest month (with the highest average high temperature) is July (22°C).
The month with the lowest average high temperature is January (-4.5°C).
- Average low temperature in September: 7.6°C
The month with the highest average low temperature is July (12.4°C).
The coldest month (with the lowest average low temperature) is January (-8.9°C).
Average pressure in September
Orimattila, 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 (1008.4mbar).
Average wind speed in September
Orimattila, Finland
- Average wind speed in September: 10.2km/h
The windiest month (with the highest average wind speed) is December (12km/h).
The calmest month (with the lowest average wind speed) is August (9.4km/h).
Average humidity in September
Orimattila, Finland
- Average humidity in September: 83%
The month with the highest relative humidity is February (95%).
The month with the lowest relative humidity is May (67%).
Average rainfall in September
Orimattila, Finland
- Average rainfall in September: 27mm
The wettest month (with the highest rainfall) is July (46mm).
The driest month (with the least rainfall) is April (24mm).
Average rainfall days in September
Orimattila, Finland
- Average rainfall days in September: 10.6 days
The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is February (3.7 days).
Average snowfall in September
Orimattila, Finland
- Average snowfall in September: 1mm
The month with the highest snowfall is January (196mm).
The months with the least snowfall are June, July and August (0mm).
Average snowfall days in September
Orimattila, Finland
- Average snowfall days in September: 0.1 days
The months with the highest number of snowfall days are January and December (18.9 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Orimattila, Finland
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 19h and 0min).
The month with the shortest days is December (Average daylight: 5h and 48min).
- Average sunshine in September: 6h and 4min
The month with the most sunshine is June (Average sunshine: 11h and 36min).
The months with the least sunshine are January and December (Average sunshine: 1h and 30min).
Average sunshine days in September
Orimattila, Finland
- Average sunshine days in September: 17.1 days
The months with the most sunshine days are May and August (17.6 days).
The month with the least sunshine days is December (8.4 days).
Average UV index in September
Orimattila, 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
Orimattila, Finland
- Average cloud cover in September: 57
The months with the most cloud cover are January and February (Cloud cover 81).
The month with the least cloud cover is August (Cloud cover 44).
Average visibility in September
Orimattila, 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).
