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
Transitioning from August to September involves a subtle drop in average high-temperatures, descending from a moderately hot 81.9°F (27.7°C) to a still warm 76.5°F (24.7°C). Norris's nighttime temperature during September is consistently averaged at a moderate 57.4°F (14.1°C).Humidity
In September, the average relative humidity is 76%.Rainfall
In Norris, Illinois, in September, during 8.5 rainfall days, 0.87" (22mm) of precipitation is typically accumulated. In Norris, during the entire year, the rain falls for 98 days and collects up to 8.86" (225mm) of precipitation.Snowfall
May through September are months without snowfall in Norris.Daylight
In September, the average length of the day is 12h and 27min.On the first day of September in Norris, Illinois, sunrise is at 6:28 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:43 pm CDT.
Sunshine
The average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September in Norris, Illinois, is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The maximum UV index of 4 during September translates into these guidelines:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Stay sun-safe with clothing that is both closely woven and worn loosely.
Frequently asked questions
What is the temperature in September in Norris?
What is the average humidity in September in Norris?
How much does it rain in Norris in September?
When it does not snow in Norris?
Does it snow in Norris in September?
How many hours of daylight does Norris have in September?
What time are sunrise and sunset in September in Norris?
How long on average sun shines in September in Norris?
What is the UV index reading in September in Norris?
Average temperature in September
Norris, IL
- Average high temperature in September: 76.5°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in September: 57.4°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (19.2°F).
Average pressure in September
Norris, IL
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.91"Hg).
Average wind speed in September
Norris, IL
- Average wind speed in September: 7.5mph
The windiest month (with the highest average wind speed) is April (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.5mph).
Average humidity in September
Norris, IL
- Average humidity in September: 76%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (71%).
Average rainfall in September
Norris, IL
- Average rainfall in September: 0.87"
The wettest month (with the highest rainfall) is May (1.3").
The driest months (with the least rainfall) are February and December (0.35").
Average rainfall days in September
Norris, IL
- Average rainfall days in September: 8.5 days
The month with the highest number of rainy days is June (13.2 days).
The month with the least rainy days is January (3 days).
Average snowfall in September
Norris, IL
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.1").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Norris, IL
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.4 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
Norris, IL
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 9h and 2min
The months with the most sunshine are June and July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in September
Norris, IL
- Average sunshine days in September: 20.4 days
The month with the most sunshine days is January (23.6 days).
The month with the least sunshine days is June (14.4 days).
Average UV index in September
Norris, IL
- Average UV index in September: 4
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Norris, IL
- Average cloud cover in September: 29
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in September
Norris, IL
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Norris, Illinois, USA
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