September weather forecastHattula, Finland
September
Weather in September
The first month of the autumn, September, is still a mild month in Hattula, Finland, with an average temperature fluctuating between 14.8°C (58.6°F) and 7.5°C (45.5°F).Temperature
The transition into September involves a decrease in the average high-temperature, falling from a pleasant 20.7°C (69.3°F) in August to a moderate 14.8°C (58.6°F). In the month of September, the average low-temperature usually rests at a chilly 7.5°C (45.5°F).Humidity
The average relative humidity in September in Hattula is 83%.Rainfall
In Hattula, in September, during 13.8 rainfall days, 31mm (1.22") of precipitation is typically accumulated. In Hattula, during the entire year, the rain falls for 128.9 days and collects up to 399mm (15.71") of precipitation.Snowfall
June through September are months without snowfall in Hattula.Daylight
In September, the average length of the day in Hattula is 12h and 54min.On the first day of September, sunrise is at 06:16 and sunset at 20:28. On the last day of the month, sunrise is at 07:27 and sunset at 18:57 EEST.
Sunshine
In Hattula, Finland, the average sunshine in September is 6.4h.UV index
In Hattula, the average daily maximum UV index in September is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 3 in September interprets into the following recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Mind you! Snow reflection can increase the intensity of the Sun's UV radiation nearly twofold.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hattula, Finland
- Average high temperature in September: 14.8°C
The warmest month (with the highest average high temperature) is July (21.8°C).
The month with the lowest average high temperature is January (-4.4°C).
- Average low temperature in September: 7.5°C
The month with the highest average low temperature is July (12.1°C).
The coldest month (with the lowest average low temperature) is January (-8.5°C).
Average pressure in September
Hattula, Finland
- Average pressure in September: 1013.2mbar
The month with the highest atmospheric pressure is May (1014.8mbar).
The month with the lowest atmospheric pressure is December (1008mbar).
Average wind speed in September
Hattula, Finland
- Average wind speed in September: 10.3km/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 (9.6km/h).
Average humidity in September
Hattula, 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 (66%).
Average rainfall in September
Hattula, Finland
- Average rainfall in September: 31mm
The wettest month (with the highest rainfall) is July (54mm).
The driest months (with the least rainfall) are March and April (25mm).
Average rainfall days in September
Hattula, Finland
- Average rainfall days in September: 13.8 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Hattula, Finland
- Average snowfall in September: 0mm
The month with the highest snowfall is January (157mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Hattula, Finland
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (18.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Hattula, Finland
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 19h and 6min).
The month with the shortest days is December (Average daylight: 5h and 42min).
- Average sunshine in September: 6h and 24min
The month with the most sunshine is June (Average sunshine: 11h and 12min).
The month with the least sunshine is December (Average sunshine: 1h and 30min).
Average sunshine days in September
Hattula, Finland
- Average sunshine days in September: 11.8 days
The month with the most sunshine days is May (15.9 days).
The month with the least sunshine days is March (9.4 days).
Average UV index in September
Hattula, 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
Hattula, Finland
- Average cloud cover in September: 59
The months with the most cloud cover are January and February (Cloud cover 80).
The months with the least cloud cover are May, June, July and August (Cloud cover 47).
Average visibility in September
Hattula, 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).
