September weather forecastMonticello, MN
September
Weather in September
September, the first month of the autumn in Monticello, is still a pleasant month, with an average temperature varying between 52.2°F (11.2°C) and 70.3°F (21.3°C).Temperature
In September, the average high-temperature marginally drops from a warm 78.3°F (25.7°C) in August to an agreeable 70.3°F (21.3°C). An average nighttime temperature of 52.2°F (11.2°C) is witnessed throughout September.Humidity
In Monticello, Minnesota, the average relative humidity in September is 75%.Rainfall
In Monticello, Minnesota, during September, the rain falls for 11.5 days and regularly aggregates up to 1.57" (40mm) of precipitation. In Monticello, Minnesota, during the entire year, the rain falls for 119.9 days and collects up to 20.51" (521mm) of precipitation.Snowfall
In Monticello, snow does not fall in June through September.Daylight
In September, the average length of the day is 12h and 31min.On the first day of the month, sunrise is at 6:37 am and sunset at 7:52 pm. On the last day of September, sunrise is at 7:13 am and sunset at 6:56 pm CDT.
Sunshine
In September, the average sunshine is 8.9h.UV index
In Monticello, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for average individuals.Note: During September, 4 as the daily maximum UV index converts into the following advice:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Monticello, MN
- Average high temperature in September: 70.3°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 (19.2°F).
- Average low temperature in September: 52.2°F
The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is January (6.6°F).
Average pressure in September
Monticello, MN
- Average pressure in September: 29.99"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in September
Monticello, MN
- Average wind speed in September: 8mph
The windiest month (with the highest average wind speed) is April (9.3mph).
The calmest month (with the lowest average wind speed) is August (6.8mph).
Average humidity in September
Monticello, MN
- Average humidity in September: 75%
The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is April (70%).
Average rainfall in September
Monticello, MN
- Average rainfall in September: 1.57"
The wettest month (with the highest rainfall) is June (3.62").
The driest month (with the least rainfall) is January (0.51").
Average rainfall days in September
Monticello, MN
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is June (16.6 days).
The month with the least rainy days is January (2.4 days).
Average snowfall in September
Monticello, MN
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.45").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Monticello, MN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Monticello, 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 54min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).
Average sunshine days in September
Monticello, MN
- Average sunshine days in September: 16.4 days
The month with the most sunshine days is October (18.5 days).
The month with the least sunshine days is June (10.6 days).
Average UV index in September
Monticello, 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
Monticello, MN
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 31).
Average visibility in September
Monticello, 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).
