September weather forecastRib Mountain, WI
September
Weather in September
September, the first month of the autumn in Rib Mountain, is also an agreeable month, with an average temperature fluctuating between 68.2°F (20.1°C) and 49.6°F (9.8°C).Temperature
In September, the meteorological conditions change slightly, with the average high-temperature moving from a warm 75.4°F (24.1°C) in August to an agreeable 68.2°F (20.1°C). The nighttime temperature, during September, averages of 49.6°F (9.8°C).Humidity
In Rib Mountain, the average relative humidity in September is 80%.Rainfall
In Rib Mountain, in September, during 11 rainfall days, 1.38" (35mm) of precipitation is typically accumulated. Throughout the year, there are 118.3 rainfall days, and 17.83" (453mm) of precipitation is accumulated.Snowfall
In Rib Mountain, snow does not fall in June through September.Daylight
In Rib Mountain, the average length of the day in September is 12h and 31min.On the first day of the month, sunrise is at 6:21 am and sunset at 7:35 pm. On the last day of September, sunrise is at 6:56 am and sunset at 6:40 pm CDT.
Sunshine
The average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, a regular UV index of 3 translates into these guidelines:
Undertake precautions - It is suggested to shield oneself from sunburn. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Rib Mountain, WI
- Average high temperature in September: 68.2°F
The warmest month (with the highest average high temperature) is July (77°F).
The month with the lowest average high temperature is January (19.6°F).
- Average low temperature in September: 49.6°F
The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).
Average pressure in September
Rib Mountain, WI
- Average pressure in September: 30.02"Hg
The months with the highest atmospheric pressure are January and February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Rib Mountain, WI
- Average wind speed in September: 7.7mph
The windiest month (with the highest average wind speed) is April (9.4mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in September
Rib Mountain, WI
- Average humidity in September: 80%
The month with the highest relative humidity is January (92%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Rib Mountain, WI
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is June (2.36").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in September
Rib Mountain, WI
- Average rainfall days in September: 11 days
The month with the highest number of rainy days is May (16.2 days).
The month with the least rainy days is January (2.7 days).
Average snowfall in September
Rib Mountain, WI
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Rib Mountain, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (16.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Rib Mountain, WI
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 12min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in September
Rib Mountain, WI
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is September (16.6 days).
The month with the least sunshine days is May (11.8 days).
Average UV index in September
Rib Mountain, WI
- Average UV index in September: 3
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
Rib Mountain, WI
- Average cloud cover in September: 39
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 37).
Average visibility in September
Rib Mountain, WI
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, October and November (6mi).
The month with the lowest visibility is January (4mi).
