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
September implies a gentle temperature shift, with average high-temperatures reducing from August's agreeable 20.8°C (69.4°F) to a moderate 15.1°C (59.2°F). During September, the average low-temperature is recorded at a frosty 8.2°C (46.8°F).Humidity
In September, the average relative humidity is 83%.Rainfall
The months with the least rainfall are August and September Rain falls for 9.7 days and accumulates 18mm (0.71") of rain.Snowfall
June through September are months without snowfall.Daylight
In Haarajoki, the average length of the day in September is 12h and 53min.On the first day of September, sunrise is at 06:14 and sunset at 20:24. On the last day of the month, sunrise is at 07:24 and sunset at 18:54 EEST.
Sunshine
In Haarajoki, the average sunshine in September is 7h.UV index
The average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: The maximum UV index of 3 during September leads to these instructions:
Be careful. Light complexion individuals might get burns in fewer than 30 minutes. Direct exposure to the Sun's intense radiation around midday should be avoided for health reasons. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Attention! Nearly twice the Sun's UV radiation can be reflected by snow.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
Does it snow in Haarajoki in September?
How many hours of daylight does Haarajoki have in September?
What time are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Haarajoki, Finland
- Average high temperature in September: 15.1°C
The warmest month (with the highest average high temperature) is July (22.2°C).
The month with the lowest average high temperature is January (-3.8°C).
- Average low temperature in September: 8.2°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 (-8.3°C).
Average pressure in September
Haarajoki, Finland
- Average pressure in September: 1013.4mbar
The month with the highest atmospheric pressure is May (1014.9mbar).
The month with the lowest atmospheric pressure is December (1008.3mbar).
Average wind speed in September
Haarajoki, Finland
- Average wind speed in September: 9.8km/h
The windiest month (with the highest average wind speed) is December (11.4km/h).
The calmest month (with the lowest average wind speed) is August (9.1km/h).
Average humidity in September
Haarajoki, 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
Haarajoki, Finland
- Average rainfall in September: 18mm
The wettest month (with the highest rainfall) is December (44mm).
The driest months (with the least rainfall) are August and September (18mm).
Average rainfall days in September
Haarajoki, Finland
- Average rainfall days in September: 9.7 days
The month with the highest number of rainy days is November (13.5 days).
The month with the least rainy days is February (4.2 days).
Average snowfall in September
Haarajoki, Finland
- Average snowfall in September: 0mm
The month with the highest snowfall is February (229mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Haarajoki, Finland
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (22.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Haarajoki, 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 0min
The month with the most sunshine is June (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 1h and 42min).
Average sunshine days in September
Haarajoki, Finland
- Average sunshine days in September: 18.2 days
The month with the most sunshine days is June (20.8 days).
The month with the least sunshine days is February (6.5 days).
Average UV index in September
Haarajoki, Finland
- Average UV index in September: 3
The months with the highest UV index are June and 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
Haarajoki, Finland
- Average cloud cover in September: 55
The months with the most cloud cover are January and February (Cloud cover 78).
The month with the least cloud cover is August (Cloud cover 42).
Average visibility in September
Haarajoki, Finland
- Average visibility in September: 8km
The months with the highest visibility are May, June and July (9km).
The months with the lowest visibility are January and February (5km).
