September weather forecastHalikko, Finland
September
Weather in September
September, the first month of the autumn in Halikko, is still a refreshing month, with an average temperature ranging between min 8.5°C (47.3°F) and max 15°C (59°F).Temperature
Halikko's weather in September involves a decrease in the average high-temperature, moving down from August's agreeable 20.1°C (68.2°F) to a moderate 15°C (59°F). Nighttime temperature lowers to an average of 8.5°C (47.3°F) in September.Humidity
In Halikko, the average relative humidity in September is 83%.Rainfall
In September, in Halikko, the rain falls for 12.6 days. Throughout September, 23mm (0.91") of precipitation is accumulated. In Halikko, during the entire year, the rain falls for 122 days and collects up to 276mm (10.87") of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 53min.On the first day of September in Halikko, sunrise is at 06:22 and sunset at 20:32. On the last day of the month, sunrise is at 07:32 and sunset at 19:02 EEST.
Sunshine
The average sunshine in September in Halikko is 7.4h.UV index
In September, the average daily maximum UV index in Halikko is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for the average person.Note: An average maximum UV index of 3 in September leads to these recommendations:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Halikko, Finland
- Average high temperature in September: 15°C
The warmest month (with the highest average high temperature) is July (21.2°C).
The month with the lowest average high temperature is January (-3.2°C).
- Average low temperature in September: 8.5°C
The month with the highest average low temperature is July (12.6°C).
The coldest month (with the lowest average low temperature) is January (-7.3°C).
Average pressure in September
Halikko, 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 (1008.1mbar).
Average wind speed in September
Halikko, Finland
- Average wind speed in September: 12km/h
The windiest month (with the highest average wind speed) is December (15.2km/h).
The calmest month (with the lowest average wind speed) is August (11km/h).
Average humidity in September
Halikko, Finland
- Average humidity in September: 83%
The months with the highest relative humidity are January and February (93%).
The month with the lowest relative humidity is May (70%).
Average rainfall in September
Halikko, Finland
- Average rainfall in September: 23mm
The wettest month (with the highest rainfall) is July (35mm).
The driest month (with the least rainfall) is April (14mm).
Average rainfall days in September
Halikko, Finland
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is July (15.9 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in September
Halikko, Finland
- Average snowfall in September: 0mm
The month with the highest snowfall is December (91mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Halikko, Finland
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (15.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Halikko, 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: 7h and 24min
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 48min).
Average sunshine days in September
Halikko, Finland
- Average sunshine days in September: 14 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
Halikko, 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
Halikko, Finland
- Average cloud cover in September: 48
The months with the most cloud cover are February and December (Cloud cover 74).
The month with the least cloud cover is August (Cloud cover 38).
Average visibility in September
Halikko, Finland
- Average visibility in September: 9km
The months with the highest visibility are May, June, July, August and September (9km).
The months with the lowest visibility are January, February and March (7km).
