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 mild shift in the average high-temperature occurs in September, reducing from an enjoyable 19.7°C (67.5°F) in August to a mild 15.3°C (59.5°F). Throughout September nights, Haarla experiences a consistent temperature average of 10.2°C (50.4°F).Humidity
The average relative humidity in September in Haarla is 79%.Rainfall
In September, the rain falls for 14.3 days. Throughout September, 40mm (1.57") of precipitation is accumulated. Throughout the year, in Haarla, there are 134.6 rainfall days, and 394mm (15.51") of precipitation is accumulated.Snowfall
June through September are months without snowfall in Haarla.Daylight
The average length of the day in September is 12h and 53min.On the first day of September, sunrise is at 06:26 and sunset at 20:35. On the last day of the month, sunrise is at 07:35 and sunset at 19:06 EEST.
Sunshine
In Haarla, the average sunshine in September is 7.6h.UV index
The average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: The maximum daily UV index of 3 during September translates into the following directions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. When the Sun is at its strongest around midday, find shade and limit exposure. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly.
Frequently asked questions
What are September temperatures in Haarla?
What is the average humidity in September in Haarla?
How much does it rain in Haarla in September?
When it does not snow in Haarla?
Does it snow in Haarla in September?
What is the average length of the day in September in Haarla?
When is the sunrise / sunset in September in Haarla?
How many hours of sunshine does Haarla have in September?
What is the UV index reading in September in Haarla?
Average temperature in September
Haarla, Finland
- Average high temperature in September: 15.3°C
The warmest month (with the highest average high temperature) is July (20.4°C).
The month with the lowest average high temperature is January (-1.9°C).
- Average low temperature in September: 10.2°C
The months with the highest average low temperature are July and August (13.8°C).
The coldest month (with the lowest average low temperature) is February (-5.6°C).
Average pressure in September
Haarla, Finland
- Average pressure in September: 1013mbar
The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1007.6mbar).
Average wind speed in September
Haarla, Finland
- Average wind speed in September: 15.9km/h
The windiest month (with the highest average wind speed) is December (20.4km/h).
The calmest month (with the lowest average wind speed) is July (13.9km/h).
Average humidity in September
Haarla, Finland
- Average humidity in September: 79%
The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is May (71%).
Average rainfall in September
Haarla, Finland
- Average rainfall in September: 40mm
The wettest month (with the highest rainfall) is July (49mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days in September
Haarla, Finland
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is July (15.1 days).
The month with the least rainy days is February (5.2 days).
Average snowfall in September
Haarla, Finland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (103mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Haarla, Finland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Haarla, Finland
- Average daylight in September: 12h and 5min
The month with the longest days is June (Average daylight: 18h and 54min).
The month with the shortest days is December (Average daylight: 5h and 54min).
- Average sunshine in September: 7h and 4min
The month with the most sunshine is July (Average sunshine: 11h and 30min).
The month with the least sunshine is December (Average sunshine: 1h and 54min).
Average sunshine days in September
Haarla, Finland
- Average sunshine days in September: 12.8 days
The month with the most sunshine days is May (17.2 days).
The month with the least sunshine days is December (9.6 days).
Average UV index in September
Haarla, Finland
- Average UV index in September: 3
The months with the highest UV index are June, July and August (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
Haarla, Finland
- Average cloud cover in September: 44
The month with the most cloud cover is December (Cloud cover 71).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility in September
Haarla, Finland
- Average visibility in September: 10km
The months with the highest visibility are May, June, July, August and September (10km).
The months with the lowest visibility are February and March (8km).
Haarla, Finland
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