September weather forecastGarnviken, Sweden
September
Weather in September
September, the first month of the autumn in Garnviken, is still a refreshing month, with an average temperature fluctuating between 15.9°C (60.6°F) and 9.7°C (49.5°F).Temperature
Garnviken's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's enjoyable 19.7°C (67.5°F) to a moderate 15.9°C (60.6°F). Garnviken throughout September, experiences an average nighttime temperature of 9.7°C (49.5°F).Humidity
In September, the average relative humidity is 80%.Rainfall
In Garnviken, in September, during 14.8 rainfall days, 37mm (1.46") of precipitation is typically accumulated. Throughout the year, there are 170 rainfall days, and 502mm (19.76") of precipitation is accumulated.Snowfall
In Garnviken, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 49min.On the first day of September, sunrise is at 06:11 and sunset at 20:10. On the last day of the month, sunrise is at 07:14 and sunset at 18:47 CEST.
Sunshine
In Garnviken, the average sunshine in September is 7.7h.UV index
In Garnviken, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unsafe exposure to UV radiation for the ordinary person.Note: The maximum UV index, 4 during September, leads to the following recommendations:
Act with care - The need to guard against sun damage is communicated. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Garnviken, Sweden
- Average high temperature in September: 15.9°C
The warmest month (with the highest average high temperature) is July (20.8°C).
The month with the lowest average high temperature is January (0.6°C).
- Average low temperature in September: 9.7°C
The month with the highest average low temperature is July (12.4°C).
The coldest month (with the lowest average low temperature) is February (-2.9°C).
Average pressure in September
Garnviken, Sweden
- Average pressure in September: 1013.5mbar
The months with the highest atmospheric pressure are April and May (1014.4mbar).
The month with the lowest atmospheric pressure is December (1008.4mbar).
Average wind speed in September
Garnviken, Sweden
- Average wind speed in September: 13.5km/h
The windiest month (with the highest average wind speed) is December (14.9km/h).
The calmest months (with the lowest average wind speed) are June and July (12km/h).
Average humidity in September
Garnviken, Sweden
- Average humidity in September: 80%
The months with the highest relative humidity are January, February, November and December (88%).
The month with the lowest relative humidity is May (71%).
Average rainfall in September
Garnviken, Sweden
- Average rainfall in September: 37mm
The wettest month (with the highest rainfall) is August (55mm).
The driest month (with the least rainfall) is April (22mm).
Average rainfall days in September
Garnviken, Sweden
- Average rainfall days in September: 14.8 days
The month with the highest number of rainy days is August (18.9 days).
The month with the least rainy days is February (9.3 days).
Average snowfall in September
Garnviken, Sweden
- Average snowfall in September: 0mm
The month with the highest snowfall is January (80mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in September
Garnviken, Sweden
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Garnviken, 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 30min).
- Average sunshine in September: 7h and 42min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 3h and 12min).
Average sunshine days in September
Garnviken, Sweden
- Average sunshine days in September: 12.3 days
The month with the most sunshine days is April (15.6 days).
The month with the least sunshine days is December (9.5 days).
Average UV index in September
Garnviken, Sweden
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Garnviken, Sweden
- Average cloud cover in September: 47
The month with the most cloud cover is February (Cloud cover 67).
The month with the least cloud cover is July (Cloud cover 41).
Average visibility in September
Garnviken, 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).
