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 onset of September brings a small change in high-temperatures, falling from a moderately hot 79.9°F (26.6°C) in August to a pleasant 69.3°F (20.7°C). September brings an average low-temperature of 51.1°F (10.6°C) to Stephen.Humidity
The average relative humidity in September is 64%.Rainfall
In Stephen, in September, it is raining for 9.3 days, with typically 1.89" (48mm) of accumulated precipitation. Throughout the year, there are 101.5 rainfall days, and 18.23" (463mm) of precipitation is accumulated.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 34min.On the first day of September, sunrise is at 6:46 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 7:07 pm CDT.
Sunshine
The average sunshine in September is 8.6h.UV index
In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for average individuals.Note: In September, a daily maximum UV index of 4 leads to the following instructions:
Act with care - The suggestion to avoid sunburn is emphasized. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures 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?
How many hours of daylight does Stephen have in September?
When are sunrise and sunset in September?
How long on average sun shines in September?
How high is the UV index in September?
Average temperature in September
Stephen, MN
- Average high temperature in September: 69.3°F
The warmest month (with the highest average high temperature) is August (79.9°F).
The month with the lowest average high temperature is January (14°F).
- Average low temperature in September: 51.1°F
The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is January (-0.2°F).
Average pressure in September
Stephen, MN
- Average pressure in September: 29.96"Hg
The month with the highest atmospheric pressure is February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in September
Stephen, MN
- Average wind speed in September: 9.8mph
The windiest month (with the highest average wind speed) is October (10.5mph).
The calmest months (with the lowest average wind speed) are July and August (8.1mph).
Average humidity in September
Stephen, MN
- Average humidity in September: 64%
The months with the highest relative humidity are January and February (92%).
The month with the lowest relative humidity is August (62%).
Average rainfall in September
Stephen, MN
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is June (3.15").
The driest months (with the least rainfall) are January and February (0.55").
Average rainfall days in September
Stephen, MN
- Average rainfall days in September: 9.3 days
The month with the highest number of rainy days is June (16.7 days).
The month with the least rainy days is January (1.6 days).
Average snowfall in September
Stephen, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.61").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Stephen, MN
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and December (14.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Stephen, MN
- Average daylight in September: 12h and 4min
The month with the longest days is June (Average daylight: 16h and 0min).
The month with the shortest days is December (Average daylight: 8h and 24min).
- Average sunshine in September: 8h and 4min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is January (Average sunshine: 2h and 42min).
Average sunshine days in September
Stephen, MN
- Average sunshine days in September: 19.2 days
The month with the most sunshine days is August (19.3 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in September
Stephen, MN
- 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, February, November and December (UV index 1).
Average cloud cover in September
Stephen, MN
- Average cloud cover in September: 31
The months with the most cloud cover are January and February (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in September
Stephen, MN
- 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).
Stephen, Minnesota, USA
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