September weather forecastBertha, MN
September
Weather in September
September, the first month of the autumn in Bertha, is still a pleasant month, with temperature in the range of an average high of 68.9°F (20.5°C) and an average low of 49.8°F (9.9°C).Temperature
With the onset of September, Bertha experiences a modest temperature adjustment, with the average high-temperature receding from a moderately hot 77.9°F (25.5°C) in August to a pleasant 68.9°F (20.5°C). Bertha records an average nighttime low-temperature of 49.8°F (9.9°C) throughout September.Humidity
In September, the average relative humidity is 73%.Rainfall
In September, in Bertha, the rain falls for 8.5 days. Throughout September, 0.98" (25mm) of precipitation is accumulated. In Bertha, during the entire year, the rain falls for 95.6 days and collects up to 13.9" (353mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:41 am and sunset at 7:58 pm. On the last day of September, sunrise is at 7:18 am and sunset at 7:01 pm CDT.
Sunshine
In Bertha, the average sunshine in September is 8.8h.UV index
The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The average daily UV index of 4 in September transforms into the following instructions:
Exercise prevention - Precautions against solar damage are endorsed. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bertha, MN
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (16.9°F).
- Average low temperature in September: 49.8°F
The month with the highest average low temperature is July (59.7°F).
The coldest month (with the lowest average low temperature) is January (3.7°F).
Average pressure in September
Bertha, MN
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is February (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Bertha, MN
- Average wind speed in September: 8.2mph
The windiest months (with the highest average wind speed) are April and October (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in September
Bertha, MN
- Average humidity in September: 73%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is May (69%).
Average rainfall in September
Bertha, MN
- Average rainfall in September: 0.98"
The wettest month (with the highest rainfall) is June (2.48").
The driest month (with the least rainfall) is February (0.31").
Average rainfall days in September
Bertha, MN
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is June (15.5 days).
The month with the least rainy days is February (1 days).
Average snowfall in September
Bertha, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.03").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Bertha, MN
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and December (13.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Bertha, MN
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in September: 8h and 48min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in September
Bertha, MN
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is June (12.1 days).
Average UV index in September
Bertha, MN
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in September
Bertha, MN
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 72).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in September
Bertha, MN
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
