September weather forecastClear Lake, MN
September
Weather in September
The first month of the autumn, September, is still a pleasant month in Clear Lake, Minnesota, with an average temperature varying between 70.2°F (21.2°C) and 51.3°F (10.7°C).Temperature
Transitioning from August to September involves a subtle drop in average high-temperatures, descending from a warm 77.9°F (25.5°C) to a pleasant 70.2°F (21.2°C). An average low-temperature of 51.3°F (10.7°C) marks the nights throughout September.Humidity
The average relative humidity in September is 74%.Rainfall
In September, the rain falls for 10.5 days. Throughout September, 1.14" (29mm) of precipitation is accumulated. In Clear Lake, during the entire year, the rain falls for 107.2 days and collects up to 15.75" (400mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
In September, the average length of the day is 12h and 31min.On the first day of the month, sunrise is at 6:38 am and sunset at 7:53 pm. On the last day of September, sunrise is at 7:13 am and sunset at 6:57 pm CDT.
Sunshine
In September, the average sunshine is 8.7h.UV index
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: The daily high UV index of 4 in September translates into this advice:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Clear Lake, MN
- Average high temperature in September: 70.2°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (18.5°F).
- Average low temperature in September: 51.3°F
The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (6.1°F).
Average pressure in September
Clear Lake, MN
- Average pressure in September: 29.99"Hg
The month with the highest atmospheric pressure is February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Clear Lake, MN
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is April (9.2mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in September
Clear Lake, MN
- Average humidity in September: 74%
The month with the highest relative humidity is January (90%).
The months with the lowest relative humidity are April and May (70%).
Average rainfall in September
Clear Lake, MN
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is June (2.72").
The driest month (with the least rainfall) is January (0.35").
Average rainfall days in September
Clear Lake, MN
- Average rainfall days in September: 10.5 days
The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is February (2.1 days).
Average snowfall in September
Clear Lake, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.31").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Clear Lake, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Clear Lake, MN
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in September: 8h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in September
Clear Lake, MN
- Average sunshine days in September: 17.6 days
The month with the most sunshine days is November (19.9 days).
The month with the least sunshine days is June (12.6 days).
Average UV index in September
Clear Lake, 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
Clear Lake, MN
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 67).
The months with the least cloud cover are July and August (Cloud cover 32).
Average visibility in September
Clear Lake, 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).
