September weather forecastHertel, WI
September
Weather in September
September, the first month of the autumn in Hertel, is also an agreeable month, with an average temperature ranging between max 68.9°F (20.5°C) and min 49.8°F (9.9°C).Temperature
The arrival of September corresponds with a light shift in temperature, down from a warm 77°F (25°C) in August to a pleasant 68.9°F (20.5°C). During the nights in September, Hertel observes an average low-temperature of 49.8°F (9.9°C).Humidity
In September, the average relative humidity in Hertel is 78%.Rainfall
In Hertel, in September, during 12.5 rainfall days, 1.69" (43mm) of precipitation is typically accumulated. In Hertel, during the entire year, the rain falls for 118.5 days and collects up to 21.1" (536mm) of precipitation.Snowfall
June through September are months without snowfall in Hertel.Daylight
The average length of the day in September in Hertel is 12h and 31min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:46 pm. On the last day of September, sunrise is at 7:06 am and sunset at 6:50 pm CDT.
Sunshine
In September, the average sunshine is 8.4h.UV index
In Hertel, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum UV index of 4 during September leads to these instructions:
Undertake protective steps - Preventing sun damage is advised. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Hertel, WI
- Average high temperature in September: 68.9°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (17.4°F).
- Average low temperature in September: 49.8°F
The month with the highest average low temperature is July (59°F).
The coldest month (with the lowest average low temperature) is January (4.8°F).
Average pressure in September
Hertel, WI
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Hertel, WI
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (8.8mph).
The calmest month (with the lowest average wind speed) is August (6.6mph).
Average humidity in September
Hertel, WI
- Average humidity in September: 78%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is May (73%).
Average rainfall in September
Hertel, WI
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is June (3.15").
The driest month (with the least rainfall) is January (0.59").
Average rainfall days in September
Hertel, WI
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is June (15.8 days).
The month with the least rainy days is January (2.4 days).
Average snowfall in September
Hertel, WI
- Average snowfall in September: 0"
The month with the highest snowfall is December (6.42").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Hertel, WI
- 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
Hertel, WI
- 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 24min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 36min).
Average sunshine days in September
Hertel, WI
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is December (16.9 days).
The month with the least sunshine days is June (11.4 days).
Average UV index in September
Hertel, WI
- 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, November and December (UV index 1).
Average cloud cover in September
Hertel, WI
- Average cloud cover in September: 39
The month with the most cloud cover is January (Cloud cover 74).
The month with the least cloud cover is July (Cloud cover 34).
Average visibility in September
Hertel, WI
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, July and October (6mi).
The months with the lowest visibility are January and February (4mi).
