September weather forecastSaint Clair, MN
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Saint Clair, Minnesota, with temperature in the range of an average high of 72.7°F (22.6°C) and an average low of 53.4°F (11.9°C).Temperature
In Saint Clair, the beginning of September is marked by a marginally lowered average high-temperature, shifting from August's moderately hot 78.4°F (25.8°C) to a pleasant 72.7°F (22.6°C). During the month of September, Saint Clair anticipates a mean low-temperature of 53.4°F (11.9°C).Humidity
In Saint Clair, Minnesota, the average relative humidity in September is 75%.Rainfall
In Saint Clair, in September, it is raining for 9.2 days, with typically 1.34" (34mm) of accumulated precipitation. In Saint Clair, Minnesota, during the entire year, the rain falls for 97.8 days and collects up to 14.21" (361mm) of precipitation.Snowfall
In Saint Clair, snow does not fall in May through September.Daylight
In Saint Clair, the average length of the day in September is 12h and 30min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:50 pm. On the last day of September, sunrise is at 7:12 am and sunset at 6:57 pm CDT.
Sunshine
The average sunshine in September is 8.7h.UV index
In Saint Clair, the average daily maximum UV index in September 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 ordinary person.Note: A typical high UV index of 4 in September suggests the following recommendations:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Saint Clair, MN
- Average high temperature in September: 72.7°F
The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (21.6°F).
- Average low temperature in September: 53.4°F
The month with the highest average low temperature is July (62.6°F).
The coldest month (with the lowest average low temperature) is January (7.9°F).
Average pressure in September
Saint Clair, MN
- Average pressure in September: 30"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in September
Saint Clair, MN
- Average wind speed in September: 8.4mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (7.3mph).
Average humidity in September
Saint Clair, MN
- Average humidity in September: 75%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is October (69%).
Average rainfall in September
Saint Clair, MN
- Average rainfall in September: 1.34"
The wettest month (with the highest rainfall) is June (2.48").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in September
Saint Clair, MN
- Average rainfall days in September: 9.2 days
The month with the highest number of rainy days is June (14.7 days).
The month with the least rainy days is February (1.3 days).
Average snowfall in September
Saint Clair, MN
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.5").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Saint Clair, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Saint Clair, MN
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Saint Clair, MN
- Average sunshine days in September: 19.2 days
The month with the most sunshine days is October (21.5 days).
The month with the least sunshine days is June (13.6 days).
Average UV index in September
Saint Clair, MN
- Average UV index in September: 4
The months with the highest UV index are June and 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
Saint Clair, MN
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 65).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in September
Saint Clair, MN
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (5mi).
