September weather forecastRajamäki, Finland
September
Weather in September
The first month of the autumn, September, is also a moderate month in Rajamäki, Finland, with temperature in the range of an average high of 15.2°C (59.4°F) and an average low of 8.3°C (46.9°F).Temperature
The onset of September is marked by a decrease in temperature, transitioning from an agreeable 20.8°C (69.4°F) in August to a moderate 15.2°C (59.4°F). An average low-temperature of 8.3°C (46.9°F) is recorded in the month of September.Humidity
The average relative humidity in September is 83%.Rainfall
In Rajamäki, during September, the rain falls for 10.3 days and regularly aggregates up to 20mm (0.79") of precipitation. Throughout the year, in Rajamäki, there are 117.8 rainfall days, and 373mm (14.69") of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 53min.On the first day of September, sunrise is at 06:15 and sunset at 20:25. On the last day of the month, sunrise is at 07:25 and sunset at 18:55 EEST.
Sunshine
In Rajamäki, the average sunshine in September is 6.9h.UV index
In Rajamäki, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the ordinary person.Note: A maximum UV index of 3 in September translates into the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rajamäki, Finland
- Average high temperature in September: 15.2°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: 8.3°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
Rajamäki, Finland
- Average pressure in September: 1013.2mbar
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
Rajamäki, Finland
- Average wind speed in September: 10km/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
Rajamäki, 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
Rajamäki, Finland
- Average rainfall in September: 20mm
The wettest month (with the highest rainfall) is December (44mm).
The driest month (with the least rainfall) is August (18mm).
Average rainfall days in September
Rajamäki, Finland
- Average rainfall days in September: 10.3 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
Rajamäki, 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
Rajamäki, 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
Rajamäki, Finland
- Average daylight in September: 12h and 54min
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: 6h and 54min
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 30min).
Average sunshine days in September
Rajamäki, Finland
- Average sunshine days in September: 17.8 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
Rajamäki, 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
Rajamäki, 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
Rajamäki, 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).
