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 74.7°F (23.7°C) to a comfortable 65.8°F (18.8°C). In the month of September, Mountain Iron's average low-temperature falls to a frosty 47.1°F (8.4°C).Humidity
In Mountain Iron, the average relative humidity in September is 78%.Rainfall
In Mountain Iron, in September, it is raining for 13.4 days, with typically 1.93" (49mm) of accumulated precipitation. Throughout the year, in Mountain Iron, there are 115.7 rainfall days, and 21.18" (538mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall. September is the first month it typically snows. Throughout September, in the average 0.2 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, there are 98.5 snowfall days, and 41.54" (1055mm) of snow is accumulated.Daylight
In September, the average length of the day is 12h and 33min.On the first day of September, sunrise is at 6:30 am and sunset at 7:50 pm. On the last day of the month, sunrise is at 7:09 am and sunset at 6:51 pm CDT.
Sunshine
The average sunshine in September in Mountain Iron is 7.8h.UV index
The average daily maximum UV index in September in Mountain Iron is 3. A UV Index reading of 3 to 5 represents a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 3 in September converts into the following recommendations:
Undertake protective steps - Preventing sun damage is advised. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Be aware! The reflective nature of snow can magnify the Sun's UV radiation almost twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Mountain Iron?
What is the average humidity in September in Mountain Iron?
How many days does it rain in September in Mountain Iron?
When does it start snowing in Mountain Iron?
What is the average length of the day in September in Mountain Iron?
When is the sunrise / sunset in September in Mountain Iron?
How long on average sun shines in September in Mountain Iron?
What is the UV index intensity in September in Mountain Iron?
Average temperature in September
Mountain Iron, MN
- Average high temperature in September: 65.8°F
The warmest month (with the highest average high temperature) is July (76.6°F).
The month with the lowest average high temperature is January (14.4°F).
- Average low temperature in September: 47.1°F
The month with the highest average low temperature is July (55.9°F).
The coldest month (with the lowest average low temperature) is January (-0.4°F).
Average pressure in September
Mountain Iron, MN
- Average pressure in September: 29.98"Hg
The month with the highest atmospheric pressure is February (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Mountain Iron, MN
- Average wind speed in September: 8.2mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).
Average humidity in September
Mountain Iron, MN
- Average humidity in September: 78%
The months with the highest relative humidity are January and February (93%).
The month with the lowest relative humidity is May (72%).
Average rainfall in September
Mountain Iron, MN
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is July (2.64").
The driest month (with the least rainfall) is February (0.79").
Average rainfall days in September
Mountain Iron, MN
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is June (16.9 days).
The month with the least rainy days is February (1.1 days).
Average snowfall in September
Mountain Iron, MN
- Average snowfall in September: 0.04"
The month with the highest snowfall is December (8.23").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Mountain Iron, MN
- Average snowfall days in September: 0.2 days
The month with the highest number of snowfall days is January (19.6 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Mountain Iron, MN
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 30min).
- Average sunshine in September: 7h and 5min
The month with the most sunshine is July (Average sunshine: 9h and 42min).
The months with the least sunshine are January and February (Average sunshine: 2h and 0min).
Average sunshine days in September
Mountain Iron, MN
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is September (14.5 days).
The month with the least sunshine days is June (10.6 days).
Average UV index in September
Mountain Iron, MN
- Average UV index in September: 3
The months with the highest UV index are July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 1).
Average cloud cover in September
Mountain Iron, MN
- Average cloud cover in September: 44
The month with the most cloud cover is January (Cloud cover 81).
The month with the least cloud cover is July (Cloud cover 37).
Average visibility in September
Mountain Iron, MN
- Average visibility in September: 5mi
The months with the highest visibility are May, June, July and October (6mi).
The months with the lowest visibility are January, February, March and December (4mi).
Mountain Iron, Minnesota, USA
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