September weather forecastHeby, Sweden
September
Weather in September
The first month of the autumn, September, is also an enjoyable month in Heby, Sweden, with temperature in the range of an average low of 8.2°C (46.8°F) and an average high of 16.3°C (61.3°F).Temperature
Heby in September experiences a gentle temperature dip, with average high-temperatures reducing from a pleasant 21.2°C (70.2°F) in August to a refreshing 16.3°C (61.3°F). During September, Heby experiences an average low-temperature of 8.2°C (46.8°F) at night.Humidity
The average relative humidity in September is 79%.Rainfall
In September, the rain falls for 12.6 days. Throughout September, 28mm (1.1") of precipitation is accumulated. Throughout the year, there are 138.7 rainfall days, and 389mm (15.31") of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 52min.On the first day of the month, sunrise is at 05:49 and sunset at 19:55. On the last day of September, sunrise is at 06:56 and sunset at 18:27 CEST.
Sunshine
In September, the average sunshine in Heby is 7.6h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the ordinary person.Note: A daily maximum UV index of 3 in September translates into the following instructions:
Preventative actions are necessary - Recommendations to ward off sunburn are given. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Heby, Sweden
- Average high temperature in September: 16.3°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 (-1.5°C).
- Average low temperature in September: 8.2°C
The month with the highest average low temperature is July (12.2°C).
The coldest month (with the lowest average low temperature) is January (-5.4°C).
Average pressure in September
Heby, Sweden
- Average pressure in September: 1013.1mbar
The month with the highest atmospheric pressure is May (1014.6mbar).
The month with the lowest atmospheric pressure is December (1007.4mbar).
Average wind speed in September
Heby, Sweden
- Average wind speed in September: 10.8km/h
The windiest month (with the highest average wind speed) is December (12.4km/h).
The calmest month (with the lowest average wind speed) is August (9.9km/h).
Average humidity in September
Heby, Sweden
- Average humidity in September: 79%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is May (69%).
Average rainfall in September
Heby, Sweden
- Average rainfall in September: 28mm
The wettest month (with the highest rainfall) is July (54mm).
The driest month (with the least rainfall) is April (19mm).
Average rainfall days in September
Heby, Sweden
- Average rainfall days in September: 12.6 days
The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in September
Heby, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is January (133mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Heby, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Heby, Sweden
- Average daylight in September: 12h and 54min
The month with the longest days is June (Average daylight: 18h and 42min).
The month with the shortest days is December (Average daylight: 6h and 6min).
- Average sunshine in September: 7h and 36min
The month with the most sunshine is June (Average sunshine: 11h and 42min).
The month with the least sunshine is December (Average sunshine: 2h and 18min).
Average sunshine days in September
Heby, Sweden
- Average sunshine days in September: 14.4 days
The month with the most sunshine days is October (16.9 days).
The month with the least sunshine days is July (10.4 days).
Average UV index in September
Heby, Sweden
- 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 and November (UV index 1).
Average cloud cover in September
Heby, Sweden
- Average cloud cover in September: 50
The month with the most cloud cover is February (Cloud cover 69).
The month with the least cloud cover is July (Cloud cover 44).
Average visibility in September
Heby, Sweden
- Average visibility in September: 8km
The months with the highest visibility are April, May, June, July and August (9km).
The months with the lowest visibility are January, February, March, November and December (7km).
