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
Prophetstown experiences an average high-temperature of a still warm 74.7°F (23.7°C) in September, marking an insignificant shift from 79.9°F (26.6°C) in August. Nighttime temperatures in September average to a mild 55.8°F (13.2°C).Humidity
In September, the average relative humidity in Prophetstown, Illinois, is 77%.Rainfall
In Prophetstown, Illinois, in September, it is raining for 12.5 days, with typically 2.2" (56mm) of accumulated precipitation. In Prophetstown, during the entire year, the rain falls for 151.5 days and collects up to 30.24" (768mm) of precipitation.Snowfall
May through September are months without snowfall in Prophetstown.Daylight
In September, the average length of the day in Prophetstown, Illinois, is 12h and 28min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:32 pm. On the last day of September, sunrise is at 6:56 am and sunset at 6:42 pm CDT.
Sunshine
In September, the average sunshine is 9.2h.UV index
The average daily maximum UV index in September in Prophetstown is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index, 4 in September, converts into the following recommendations:
Make use of precautions - Suggestions to resist sunburn are communicated. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Frequently asked questions
What are the temperatures in Prophetstown in September?
What is the average humidity in September in Prophetstown?
How much does it rain in Prophetstown in September?
When it does not snow in Prophetstown?
Does it snow in Prophetstown in September?
What is the average length of the day in September in Prophetstown?
When are sunrise and sunset in September in Prophetstown?
How many hours of sunshine does Prophetstown have in September?
What is the UV index reading in September in Prophetstown?
Average temperature in September
Prophetstown, IL
- Average high temperature in September: 74.7°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 (27.7°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (15.1°F).
Average pressure in September
Prophetstown, IL
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Prophetstown, IL
- Average wind speed in September: 7.6mph
The windiest month (with the highest average wind speed) is April (10.4mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Prophetstown, IL
- Average humidity in September: 77%
The months with the highest relative humidity are January and July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Prophetstown, IL
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is May (4.53").
The driest month (with the least rainfall) is January (1.42").
Average rainfall days in September
Prophetstown, IL
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (18.8 days).
The month with the least rainy days is January (5.2 days).
Average snowfall in September
Prophetstown, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (4.49").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Prophetstown, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Prophetstown, IL
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in September
Prophetstown, IL
- Average sunshine days in September: 15.7 days
The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is June (9.1 days).
Average UV index in September
Prophetstown, IL
- Average UV index in September: 4
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Prophetstown, IL
- Average cloud cover in September: 30
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in September
Prophetstown, IL
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
Prophetstown, Illinois, USA
Weather forecast for your location
2. Allow the app to use your location
