September weather forecastMonticello, KY
September
Weather in September
September, the first month of the autumn in Monticello, is still a warm month, with temperature in the range of an average low of 59.2°F (15.1°C) and an average high of 79.7°F (26.5°C).Temperature
September sees a slight reduction in average high-temperature, with a shift from a moderately hot 85.3°F (29.6°C) in August to a still warm 79.7°F (26.5°C). An average low-temperature of 59.2°F (15.1°C) is observed during the September nights.Humidity
In Monticello, the average relative humidity in September is 77%.Rainfall
September is the month with the least rainfall in Monticello. Rain falls for 13.6 days and accumulates 2.05" (52mm) of precipitation.Snowfall
In Monticello, snow does not fall in May through September.Daylight
In Monticello, Kentucky, the average length of the day in September is 12h and 24min.On the first day of September, sunrise is at 7:10 am and sunset at 8:07 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 7:23 pm EDT.
Sunshine
The average sunshine in September is 8.3h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: The maximum UV index of 5 during September translates into these guidelines:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Monticello, KY
- Average high temperature in September: 79.7°F
The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is January (41.9°F).
- Average low temperature in September: 59.2°F
The month with the highest average low temperature is July (65.3°F).
The coldest month (with the lowest average low temperature) is January (27.9°F).
Average pressure in September
Monticello, KY
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Monticello, KY
- Average wind speed in September: 4.5mph
The windiest month (with the highest average wind speed) is February (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.2mph).
Average humidity in September
Monticello, KY
- Average humidity in September: 77%
The months with the highest relative humidity are February and December (80%).
The months with the lowest relative humidity are June, August, October and November (76%).
Average rainfall in September
Monticello, KY
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is February (3.94").
The driest month (with the least rainfall) is September (2.05").
Average rainfall days in September
Monticello, KY
- Average rainfall days in September: 13.6 days
The months with the highest number of rainy days are May and July (17.8 days).
The month with the least rainy days is November (10.8 days).
Average snowfall in September
Monticello, KY
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.95").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Monticello, KY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Monticello, KY
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 8h and 18min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in September
Monticello, KY
- Average sunshine days in September: 14.7 days
The month with the most sunshine days is October (16.7 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in September
Monticello, KY
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover in September
Monticello, KY
- Average cloud cover in September: 33
The month with the most cloud cover is February (Cloud cover 56).
The months with the least cloud cover are June and August (Cloud cover 31).
Average visibility in September
Monticello, KY
- Average visibility in September: 5mi
The months with the highest visibility are April, June, October, November and December (6mi).
The months with the lowest visibility are January, February, March, May, July, August and September (5mi).
