September weather forecastMarstal, Denmark
September
Weather in September
September, the first month of the autumn in Marstal, is still a refreshing month, with temperature in the range of an average high of 16.6°C (61.9°F) and an average low of 13.8°C (56.8°F).Temperature
In September, the average high-temperature marginally drops from 19.8°C (67.6°F) in August to a still comfortable 16.6°C (61.9°F). Marstal encounters a small divergence from daytime high temperatures, averaging a low-temperature of 13.8°C (56.8°F) during September nights.Humidity
In September, the average relative humidity is 79%.Rainfall
In Marstal, in September, it is raining for 16 days, with typically 52mm (2.05") of accumulated precipitation. Throughout the year, in Marstal, there are 174.7 rainfall days, and 493mm (19.41") of precipitation is accumulated.Snowfall
May through October are months without snowfall.Sea temperature
In September, the average sea temperature in Marstal is 16.8°C (62.2°F).Note: Swimming is not an enjoyable activity for the majority when the water is at 16.8°C (62.2°F). The difficulty of controlling breathing increases as the temperature dips from 21°C (69.8°F) to 15°C (59°F).
Daylight
In September, the average length of the day in Marstal is 12h and 43min.On the first day of the month, sunrise is at 06:25 and sunset at 20:09. On the last day of September, in Marstal, Denmark, sunrise is at 07:19 and sunset at 18:56 CEST.
Sunshine
In September, the average sunshine is 7.6h.UV index
In September, the average daily maximum UV index in Marstal is 4. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Marstal, Denmark
- Average high temperature in September: 16.6°C
The warmest months (with the highest average high temperature) are July and August (19.8°C).
The month with the lowest average high temperature is February (2.9°C).
- Average low temperature in September: 13.8°C
The month with the highest average low temperature is August (16°C).
The coldest month (with the lowest average low temperature) is February (0.8°C).
Average pressure in September
Marstal, Denmark
- Average pressure in September: 1015.4mbar
The months with the highest atmospheric pressure are April and May (1015.6mbar).
The month with the lowest atmospheric pressure is November (1011.1mbar).
Average wind speed in September
Marstal, Denmark
- Average wind speed in September: 21.6km/h
The windiest month (with the highest average wind speed) is December (26.4km/h).
The calmest month (with the lowest average wind speed) is July (18.4km/h).
Average humidity in September
Marstal, Denmark
- Average humidity in September: 79%
The months with the highest relative humidity are January, February and December (86%).
The month with the lowest relative humidity is August (77%).
Average rainfall in September
Marstal, Denmark
- Average rainfall in September: 52mm
The wettest month (with the highest rainfall) is July (64mm).
The driest month (with the least rainfall) is April (16mm).
Average rainfall days in September
Marstal, Denmark
- Average rainfall days in September: 16 days
The month with the highest number of rainy days is July (18.4 days).
The month with the least rainy days is February (10 days).
Average snowfall in September
Marstal, Denmark
- Average snowfall in September: 0mm
The month with the highest snowfall is February (22mm).
The months with the least snowfall are May, June, July, August, September and October (0mm).
Average snowfall days in September
Marstal, Denmark
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average sea temperature in September
Marstal, Denmark
- Average sea temperature in September: 16.8°C
The best month for swimming (with the highest average sea temperature) is August (18.3°C).
The coldest month (with the lowest average sea temperature) is January (2.3°C).
Average daylight in September /
Average sunshine in September
Marstal, Denmark
- Average daylight in September: 12h and 42min
The month with the longest days is June (Average daylight: 17h and 12min).
The month with the shortest days is December (Average daylight: 7h and 18min).
- Average sunshine in September: 7h and 36min
The month with the most sunshine is June (Average sunshine: 9h and 42min).
The month with the least sunshine is December (Average sunshine: 3h and 12min).
Average sunshine days in September
Marstal, Denmark
- Average sunshine days in September: 10.6 days
The month with the most sunshine days is April (17.2 days).
The month with the least sunshine days is July (9.8 days).
Average UV index in September
Marstal, Denmark
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in September
Marstal, Denmark
- Average cloud cover in September: 47
The month with the most cloud cover is December (Cloud cover 70).
The months with the least cloud cover are June and August (Cloud cover 40).
Average visibility in September
Marstal, Denmark
- 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).
