Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
As September commences, the average high-temperature subtly reduces, transitioning from a warm 76.8°F (24.9°C) in August to an agreeable 70.5°F (21.4°C). Rock Falls, in the month of September, anticipates a consistent average low-temperature of 50.9°F (10.5°C).Humidity
In Rock Falls, the average relative humidity in September is 80%.Rainfall
In Rock Falls, in September, during 12.1 rainfall days, 2.28" (58mm) of precipitation is typically accumulated. In Rock Falls, during the entire year, the rain falls for 135.6 days and collects up to 26.57" (675mm) of precipitation.Snowfall
In Rock Falls, snow does not fall in June through September.Daylight
In September, the average length of the day in Rock Falls is 12h and 31min.On the first day of the month, sunrise is at 6:30 am and sunset at 7:42 pm. On the last day of September, sunrise is at 7:04 am and sunset at 6:48 pm CDT.
Sunshine
In September, the average sunshine in Rock Falls is 8.5h.UV index
In Rock Falls, Wisconsin, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Frequently asked questions
What is the average September temperature in Rock Falls?
What is the average humidity in September in Rock Falls?
How much does it rain in Rock Falls in September?
When it does not snow in Rock Falls?
Does it snow in Rock Falls in September?
How many hours of daylight does Rock Falls have in September?
When are sunrise and sunset in September in Rock Falls?
How long on average sun shines in September in Rock Falls?
What is the UV index intensity in September in Rock Falls?
Average temperature in September
Rock Falls, WI
- Average high temperature in September: 70.5°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 (19.9°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (6.3°F).
Average pressure in September
Rock Falls, WI
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in September
Rock Falls, WI
- Average wind speed in September: 7.3mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).
Average humidity in September
Rock Falls, WI
- Average humidity in September: 80%
The months with the highest relative humidity are January and February (91%).
The months with the lowest relative humidity are April and October (77%).
Average rainfall in September
Rock Falls, WI
- Average rainfall in September: 2.28"
The wettest month (with the highest rainfall) is June (4.57").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in September
Rock Falls, WI
- Average rainfall days in September: 12.1 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (3.6 days).
Average snowfall in September
Rock Falls, WI
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.38").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Rock Falls, 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
Rock Falls, WI
- Average daylight in September: 12h and 3min
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 3min
The months with the most sunshine are July and August (Average sunshine: 9h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).
Average sunshine days in September
Rock Falls, WI
- Average sunshine days in September: 15.8 days
The month with the most sunshine days is October (16.3 days).
The month with the least sunshine days is June (9.8 days).
Average UV index in September
Rock Falls, 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, February, November and December (UV index 1).
Average cloud cover in September
Rock Falls, WI
- Average cloud cover in September: 37
The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Rock Falls, WI
- Average visibility in September: 5mi
The months with the highest visibility are April, May, June, August, October and November (6mi).
The month with the lowest visibility is January (4mi).
Rock Falls, Wisconsin, USA
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