September weather forecastHerman, MN
September
Weather in September
The first month of the autumn, September, is also an agreeable month in Herman, Minnesota, with an average temperature varying between 72°F (22.2°C) and 52°F (11.1°C).Temperature
A minor decrease in the average high-temperature is observed during September, shifting from a moderately hot 79.7°F (26.5°C) in August to a pleasant 72°F (22.2°C). Herman's average low-temperature for the month of September records at a cool 52°F (11.1°C).Humidity
In September, the average relative humidity is 68%.Rainfall
In Herman, in September, during 8.5 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. Throughout the year, in Herman, Minnesota, there are 105.3 rainfall days, and 19.29" (490mm) of precipitation is accumulated.Snowfall
In Herman, snow does not fall in June through September.Daylight
In September, the average length of the day in Herman is 12h and 31min.On the first day of the month, sunrise is at 6:46 am and sunset at 8:02 pm. On the last day of September, sunrise is at 7:22 am and sunset at 7:05 pm CDT.
Sunshine
In Herman, the average sunshine in September is 8.8h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 4 during September translates into the following recommendations:
Undertake protective steps - Preventing sun damage is advised. Around midday, solar radiation is most harmful; hence, exposure should be limited. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Herman, MN
- Average high temperature in September: 72°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (18°F).
- Average low temperature in September: 52°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (4.5°F).
Average pressure in September
Herman, MN
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in September
Herman, MN
- Average wind speed in September: 9.3mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in September
Herman, MN
- Average humidity in September: 68%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and May (67%).
Average rainfall in September
Herman, MN
- Average rainfall in September: 1.42"
The wettest months (with the highest rainfall) are June and July (3.15").
The driest months (with the least rainfall) are January and February (0.55").
Average rainfall days in September
Herman, MN
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is June (15.7 days).
The month with the least rainy days is February (1.9 days).
Average snowfall in September
Herman, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Herman, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (14.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Herman, 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 18min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
Herman, MN
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is September (19.5 days).
The month with the least sunshine days is June (12.1 days).
Average UV index in September
Herman, MN
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Herman, MN
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 29).
Average visibility in September
Herman, 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, February, March and December (5mi).
