September weather forecastGränna, Sweden
September
Weather in September
The first month of the autumn, September, is still a mild month in Gränna, Sweden, with an average temperature fluctuating between 15.2°C (59.4°F) and 8.8°C (47.8°F).Temperature
A moderate decline in average high-temperatures is noted in September, moving from a refreshing 19.5°C (67.1°F) in August to a mild 15.2°C (59.4°F). The average low-temperature during September nights is a chilly 8.8°C (47.8°F).Humidity
The average relative humidity in September is 82%.Rainfall
In Gränna, Sweden, in September, it is raining for 15.1 days, with typically 35mm (1.38") of accumulated precipitation. Throughout the year, there are 170.1 rainfall days, and 502mm (19.76") of precipitation is accumulated.Snowfall
In Gränna, snow does not fall in June through September.Daylight
The average length of the day in September is 12h and 48min.On the first day of the month, sunrise is at 06:03 and sunset at 20:00. On the last day of September, sunrise is at 07:05 and sunset at 18:38 CEST.
Sunshine
In Gränna, the average sunshine in September is 7h.UV index
In Gränna, Sweden, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: An average maximum UV index of 3 in September leads to these recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Gränna, Sweden
- Average high temperature in September: 15.2°C
The warmest month (with the highest average high temperature) is July (20.4°C).
The month with the lowest average high temperature is January (-0.3°C).
- Average low temperature in September: 8.8°C
The month with the highest average low temperature is July (11.7°C).
The coldest month (with the lowest average low temperature) is February (-3.6°C).
Average pressure in September
Gränna, Sweden
- Average pressure in September: 1014mbar
The months with the highest atmospheric pressure are April and May (1014.7mbar).
The month with the lowest atmospheric pressure is December (1009mbar).
Average wind speed in September
Gränna, Sweden
- Average wind speed in September: 13.9km/h
The windiest month (with the highest average wind speed) is December (16.8km/h).
The calmest months (with the lowest average wind speed) are July and August (12.4km/h).
Average humidity in September
Gränna, Sweden
- Average humidity in September: 82%
The month with the highest relative humidity is November (90%).
The month with the lowest relative humidity is May (71%).
Average rainfall in September
Gränna, Sweden
- Average rainfall in September: 35mm
The wettest month (with the highest rainfall) is June (61mm).
The driest month (with the least rainfall) is April (21mm).
Average rainfall days in September
Gränna, Sweden
- Average rainfall days in September: 15.1 days
The month with the highest number of rainy days is August (20.2 days).
The month with the least rainy days is February (6.9 days).
Average snowfall in September
Gränna, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is February (154mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Gränna, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (15 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Gränna, Sweden
- Average daylight in September: 12h and 48min
The month with the longest days is June (Average daylight: 18h and 6min).
The month with the shortest days is December (Average daylight: 6h and 36min).
- Average sunshine in September: 7h and 0min
The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is December (Average sunshine: 2h and 48min).
Average sunshine days in September
Gränna, Sweden
- Average sunshine days in September: 11 days
The month with the most sunshine days is April (12.8 days).
The month with the least sunshine days is August (8.1 days).
Average UV index in September
Gränna, Sweden
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 4).
The months with the lowest UV index are January and February (UV index 1).
Average cloud cover in September
Gränna, Sweden
- Average cloud cover in September: 53
The month with the most cloud cover is December (Cloud cover 72).
The months with the least cloud cover are May and June (Cloud cover 45).
Average visibility in September
Gränna, Sweden
- Average visibility in September: 9km
The months with the highest visibility are April, May, June, July, August, September and October (9km).
The months with the lowest visibility are January, February, March, November and December (8km).
