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
Jakobstad in September undergoes a slight reduction in the average high-temperature, shifting from August's refreshing 16.9°C (62.4°F) to a moderate 13.3°C (55.9°F). Jakobstad, during the nights of September, averages a temperature close to its daytime high, at a fresh 10°C (50°F).Humidity
The average relative humidity in September in Jakobstad, Finland, is 79%.Rainfall
In September, in Jakobstad, the rain falls for 14.9 days. Throughout September, 39mm (1.54") of precipitation is accumulated. Throughout the year, in Jakobstad, there are 134.8 rainfall days, and 453mm (17.83") of precipitation is accumulated.Snowfall
In Jakobstad, snow does not fall in June through September.Daylight
The average length of the day in September in Jakobstad, Finland, is 13h and 0min.On the first day of September in Jakobstad, sunrise is at 06:14 and sunset at 20:43. On the last day of the month, sunrise is at 07:36 and sunset at 19:01 EEST.
Sunshine
In September, the average sunshine is 7.5h.UV index
The average daily maximum UV index in September in Jakobstad, Finland, is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 3 during September morphs into the following directions:
Prioritize safety - Recommendations to avert sunburn are shared. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Frequently asked questions
What are September temperatures in Jakobstad?
What is the average humidity in September in Jakobstad?
How many days does it rain in September in Jakobstad?
When it does not snow in Jakobstad?
Does it snow in Jakobstad in September?
What is the average length of the day in September in Jakobstad?
When are sunrise and sunset in September in Jakobstad?
How many hours of sunshine does Jakobstad have in September?
What is the UV index intensity in September in Jakobstad?
Average temperature in September
Jakobstad, Finland
- Average high temperature in September: 13.3°C
The warmest month (with the highest average high temperature) is July (17.6°C).
The months with the lowest average high temperature are January and February (-3.3°C).
- Average low temperature in September: 10°C
The month with the highest average low temperature is August (13.4°C).
The coldest month (with the lowest average low temperature) is February (-6.7°C).
Average pressure in September
Jakobstad, Finland
- Average pressure in September: 1011.6mbar
The month with the highest atmospheric pressure is May (1014.2mbar).
The month with the lowest atmospheric pressure is December (1005.4mbar).
Average wind speed in September
Jakobstad, Finland
- Average wind speed in September: 18.6km/h
The windiest month (with the highest average wind speed) is December (22.3km/h).
The calmest month (with the lowest average wind speed) is July (15.1km/h).
Average humidity in September
Jakobstad, Finland
- Average humidity in September: 79%
The month with the highest relative humidity is February (91%).
The month with the lowest relative humidity is June (74%).
Average rainfall in September
Jakobstad, Finland
- Average rainfall in September: 39mm
The wettest month (with the highest rainfall) is August (57mm).
The driest month (with the least rainfall) is April (23mm).
Average rainfall days in September
Jakobstad, Finland
- Average rainfall days in September: 14.9 days
The month with the highest number of rainy days is August (17.5 days).
The month with the least rainy days is February (4.4 days).
Average snowfall in September
Jakobstad, Finland
- Average snowfall in September: 0mm
The month with the highest snowfall is March (147mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Jakobstad, Finland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Jakobstad, Finland
- Average daylight in September: 13h and 0min
The month with the longest days is June (Average daylight: 20h and 30min).
The month with the shortest days is December (Average daylight: 4h and 36min).
- Average sunshine in September: 7h and 3min
The month with the most sunshine is June (Average sunshine: 13h and 0min).
The month with the least sunshine is December (Average sunshine: 1h and 6min).
Average sunshine days in September
Jakobstad, Finland
- Average sunshine days in September: 12.5 days
The month with the most sunshine days is May (16.8 days).
The month with the least sunshine days is December (10.4 days).
Average UV index in September
Jakobstad, 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 and December (UV index 1).
Average cloud cover in September
Jakobstad, Finland
- Average cloud cover in September: 49
The month with the most cloud cover is January (Cloud cover 72).
The months with the least cloud cover are June and July (Cloud cover 38).
Average visibility in September
Jakobstad, Finland
- Average visibility in September: 10km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January, February, March and April (8km).
Jakobstad, Finland
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