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 brings a minor change in the average high-temperature, shifting from a warm 78.3°F (25.7°C) in August to an agreeable 72°F (22.2°C). Iona, during September, witnesses an average low-temperature of 52.3°F (11.3°C).Humidity
In Iona, the average relative humidity in September is 72%.Rainfall
In Iona, in September, it is raining for 9.5 days, with typically 1.77" (45mm) of accumulated precipitation. Throughout the year, there are 113.2 rainfall days, and 22.2" (564mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 29min.On the first day of September, sunrise is at 6:47 am and sunset at 7:58 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 7:05 pm CDT.
Sunshine
In Iona, the average sunshine in September is 8.9h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: In September, a regular UV index of 4 translates into these guidelines:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Iona in September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
Does it snow in September?
How many hours of daylight does Iona have in September?
When is the sunrise / sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Iona, MN
- Average high temperature in September: 72°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (20.8°F).
- Average low temperature in September: 52.3°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (7.7°F).
Average pressure in September
Iona, MN
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Iona, MN
- Average wind speed in September: 9.6mph
The windiest month (with the highest average wind speed) is April (11.4mph).
The calmest month (with the lowest average wind speed) is July (8.1mph).
Average humidity in September
Iona, MN
- Average humidity in September: 72%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (67%).
Average rainfall in September
Iona, MN
- Average rainfall in September: 1.77"
The wettest month (with the highest rainfall) is June (3.11").
The driest month (with the least rainfall) is January (0.75").
Average rainfall days in September
Iona, MN
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is June (15.9 days).
The month with the least rainy days is February (2.1 days).
Average snowfall in September
Iona, MN
- Average snowfall in September: 0"
The month with the highest snowfall is February (6.3").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Iona, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is December (12.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Iona, MN
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in September: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Iona, MN
- Average sunshine days in September: 19.1 days
The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is April (11.2 days).
Average UV index in September
Iona, MN
- Average UV index in September: 4
The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February and November (UV index 1).
Average cloud cover in September
Iona, MN
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 61).
The months with the least cloud cover are July and September (Cloud cover 31).
Average visibility in September
Iona, MN
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and December (5mi).
Iona, Minnesota, USA
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