September weather forecastRoseau, MN
September
Weather in September
September depicts the onset of fall in Roseau, with a steady drop in temperature following the hot summer. A noteworthy rainfall of 1.93" (49mm), accompanied by a drop in daylight hours, marks a change in season. Even though summer warmth lingers, the evenings start to get cooler. The transformation in the scenery starts to be viable, with trees turning into beautiful shades of red, orange, and yellow. The city readies itself for the arrival of another autumn.Temperature
The commencement of September indicates a shift in the average high-temperature, receding from August's warm 75.7°F (24.3°C) to a comfortable 65.8°F (18.8°C). An average nighttime temperature of 48.2°F (9°C) is observed during September.Humidity
The average relative humidity in September is 71%.Rainfall
In Roseau, in September, it is raining for 10.5 days, with typically 1.93" (49mm) of accumulated precipitation. Throughout the year, there are 105.7 rainfall days, and 17.64" (448mm) of precipitation is accumulated.Snowfall
In Roseau, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 34min.On the first day of the month, sunrise is at 6:41 am and sunset at 8:04 pm. On the last day of September, in Roseau, sunrise is at 7:22 am and sunset at 7:03 pm CDT.
Sunshine
The average sunshine in September is 8.3h.UV index
In Roseau, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: In September, the maximum UV index of 4 transforms into these recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Roseau, MN
- Average high temperature in September: 65.8°F
The warmest month (with the highest average high temperature) is July (76.5°F).
The month with the lowest average high temperature is January (13.5°F).
- Average low temperature in September: 48.2°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (0°F).
Average pressure in September
Roseau, MN
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Roseau, MN
- Average wind speed in September: 8.6mph
The windiest month (with the highest average wind speed) is October (9.1mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).
Average humidity in September
Roseau, MN
- Average humidity in September: 71%
The months with the highest relative humidity are January and February (94%).
The month with the lowest relative humidity is May (67%).
Average rainfall in September
Roseau, MN
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is June (2.83").
The driest month (with the least rainfall) is February (0.59").
Average rainfall days in September
Roseau, MN
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is January (1.8 days).
Average snowfall in September
Roseau, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Roseau, MN
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is January (17.2 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Roseau, MN
- Average daylight in September: 12h and 36min
The month with the longest days is June (Average daylight: 16h and 6min).
The month with the shortest days is December (Average daylight: 8h and 18min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 2h and 0min).
Average sunshine days in September
Roseau, MN
- Average sunshine days in September: 16.5 days
The month with the most sunshine days is August (17.1 days).
The month with the least sunshine days is June (11 days).
Average UV index in September
Roseau, MN
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Roseau, MN
- Average cloud cover in September: 36
The months with the most cloud cover are January and February (Cloud cover 80).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Roseau, MN
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
