September weather forecastRoyalton, WI
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Royalton, Wisconsin, with an average temperature ranging between min 51.1°F (10.6°C) and max 70.2°F (21.2°C).Temperature
In Royalton, entering September brings a subtle temperature decrement, reducing from August's warm 77.4°F (25.2°C) to a pleasant 70.2°F (21.2°C). In Royalton, the average temperature during the nights of September drops to a fresh 51.1°F (10.6°C).Humidity
The average relative humidity in September in Royalton is 80%.Rainfall
In Royalton, in September, during 11.9 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. Throughout the year, there are 132 rainfall days, and 25.79" (655mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall in Royalton.Daylight
The average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:19 am and sunset at 7:31 pm. On the last day of September, in Royalton, sunrise is at 6:52 am and sunset at 6:37 pm CDT.
Sunshine
The average sunshine in September in Royalton is 8.5h.UV index
In September, the average daily maximum UV index is 3. A UV Index of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for the average person.Note: In September, the UV index of 3 transforms into the following advice:
Undertake precautions - Obligation exists to protect against skin and eye damage. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Royalton, WI
- Average high temperature in September: 70.2°F
The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is January (21.9°F).
- Average low temperature in September: 51.1°F
The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in September
Royalton, WI
- Average pressure in September: 30.02"Hg
The months with the highest atmospheric pressure are January, February and March (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Royalton, WI
- Average wind speed in September: 7.7mph
The windiest month (with the highest average wind speed) is April (9.8mph).
The calmest month (with the lowest average wind speed) is August (7mph).
Average humidity in September
Royalton, WI
- Average humidity in September: 80%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is April (76%).
Average rainfall in September
Royalton, WI
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is May (3.66").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in September
Royalton, WI
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is January (4 days).
Average snowfall in September
Royalton, WI
- Average snowfall in September: 0"
The month with the highest snowfall is January (6.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Royalton, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (13 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Royalton, 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 54min).
- Average sunshine in September: 8h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Royalton, WI
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is November (16.7 days).
The month with the least sunshine days is April (11.7 days).
Average UV index in September
Royalton, WI
- Average UV index in September: 3
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in September
Royalton, WI
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in September
Royalton, WI
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
