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
The beginning of September subtly marks a decrease in the average high-temperature, transitioning from a moderately hot 75.2°F (24°C) in August to an enjoyable 67.1°F (19.5°C). Iron River's average low-temperature in the month of September is recorded at a fresh 50.9°F (10.5°C).Humidity
The average relative humidity in September is 77%.Rainfall
In Iron River, in September, during 13 rainfall days, 1.61" (41mm) of precipitation is typically accumulated. In Iron River, during the entire year, the rain falls for 121.6 days and collects up to 21.42" (544mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In Iron River, the average length of the day in September is 12h and 32min.On the first day of the month, sunrise is at 6:26 am and sunset at 7:44 pm. On the last day of September, sunrise is at 7:03 am and sunset at 6:46 pm CDT.
Sunshine
In Iron River, Wisconsin, the average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 4 in September translates into these instructions:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The Sun's radiation is especially intense around midday; try to stay in shade during this period. A hat with a broad brim is indispensable, filtering out up to half of UV rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What is the average humidity in September?
How many days does it rain in September?
When it does not snow?
Does it snow in September?
What is the average length of the day in September?
When is the sunrise / sunset in September?
How long on average sun shines in September in Iron River?
How high is the UV index in September?
Average temperature in September
Iron River, WI
- Average high temperature in September: 67.1°F
The warmest month (with the highest average high temperature) is July (76.8°F).
The month with the lowest average high temperature is January (19.4°F).
- Average low temperature in September: 50.9°F
The month with the highest average low temperature is July (57.7°F).
The coldest month (with the lowest average low temperature) is January (8.6°F).
Average pressure in September
Iron River, WI
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is February (30.1"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in September
Iron River, WI
- Average wind speed in September: 7.9mph
The windiest month (with the highest average wind speed) is November (9.1mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in September
Iron River, WI
- Average humidity in September: 77%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is May (72%).
Average rainfall in September
Iron River, WI
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is July (2.56").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in September
Iron River, WI
- Average rainfall days in September: 13 days
The month with the highest number of rainy days is June (15.5 days).
The month with the least rainy days is January (3.2 days).
Average snowfall in September
Iron River, WI
- Average snowfall in September: 0"
The month with the highest snowfall is December (7.95").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Iron River, WI
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (21.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Iron River, WI
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in September
Iron River, WI
- Average sunshine days in September: 15 days
The month with the most sunshine days is September (15 days).
The month with the least sunshine days is December (9.8 days).
Average UV index in September
Iron River, 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, November and December (UV index 1).
Average cloud cover in September
Iron River, WI
- Average cloud cover in September: 38
The month with the most cloud cover is January (Cloud cover 78).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in September
Iron River, WI
- Average visibility in September: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The month with the lowest visibility is January (4mi).
Iron River, Wisconsin, USA
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