September weather forecastBarnvik, Sweden
September
Weather in September
The first month of the autumn, September, is also a moderate month in Barnvik, Sweden, with an average temperature varying between 11.5°C (52.7°F) and 15.1°C (59.2°F).Temperature
Barnvik experiences a moderate temperature shift at the start of September, with average high-temperatures adjusting a bit from a refreshing 18.7°C (65.7°F) in August to a mild 15.1°C (59.2°F). Barnvik encounters a small divergence from daytime high temperatures, averaging a low-temperature of 11.5°C (52.7°F) during September nights.Humidity
In Barnvik, the average relative humidity in September is 80%.Rainfall
In Barnvik, in September, it is raining for 11.6 days, with typically 21mm (0.83") of accumulated precipitation. Throughout the year, in Barnvik, there are 125.3 rainfall days, and 261mm (10.28") of precipitation is accumulated.Snowfall
In Barnvik, snow does not fall in June through September.Daylight
The average length of the day in September in Barnvik is 12h and 50min.On the first day of September in Barnvik, Sweden, sunrise is at 05:43 and sunset at 19:47. On the last day of the month, sunrise is at 06:49 and sunset at 18:21 CEST.
Sunshine
In Barnvik, the average sunshine in September is 8.3h.UV index
In Barnvik, the average daily maximum UV index in September is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 3 during September translates into the following guidance:
Make use of precautions - Shielding skin and eyes from injury is a requirement. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Barnvik, Sweden
- Average high temperature in September: 15.1°C
The warmest month (with the highest average high temperature) is July (18.9°C).
The months with the lowest average high temperature are January and February (0.4°C).
- Average low temperature in September: 11.5°C
The month with the highest average low temperature is August (14.8°C).
The coldest month (with the lowest average low temperature) is January (-2.2°C).
Average pressure in September
Barnvik, Sweden
- 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 (1007.8mbar).
Average wind speed in September
Barnvik, Sweden
- Average wind speed in September: 18.9km/h
The windiest month (with the highest average wind speed) is December (24.7km/h).
The calmest month (with the lowest average wind speed) is July (15.8km/h).
Average humidity in September
Barnvik, Sweden
- Average humidity in September: 80%
The months with the highest relative humidity are January, February, November and December (85%).
The months with the lowest relative humidity are April, May and June (77%).
Average rainfall in September
Barnvik, Sweden
- Average rainfall in September: 21mm
The wettest month (with the highest rainfall) is July (35mm).
The driest month (with the least rainfall) is April (10mm).
Average rainfall days in September
Barnvik, Sweden
- Average rainfall days in September: 11.6 days
The month with the highest number of rainy days is August (13.9 days).
The month with the least rainy days is February (5.4 days).
Average snowfall in September
Barnvik, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is December (41mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Barnvik, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Barnvik, Sweden
- Average daylight in September: 12h and 48min
The month with the longest days is June (Average daylight: 18h and 30min).
The month with the shortest days is December (Average daylight: 6h and 18min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is June (Average sunshine: 12h and 36min).
The month with the least sunshine is December (Average sunshine: 2h and 30min).
Average sunshine days in September
Barnvik, Sweden
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is May (17.9 days).
The month with the least sunshine days is December (11.7 days).
Average UV index in September
Barnvik, Sweden
- 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 and February (UV index 1).
Average cloud cover in September
Barnvik, Sweden
- Average cloud cover in September: 40
The months with the most cloud cover are January and February (Cloud cover 66).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Barnvik, Sweden
- Average visibility in September: 10km
The months with the highest visibility are April, May, June, July, August, September and October (10km).
The months with the lowest visibility are January, February, March, November and December (9km).
