September weather forecastSomerset, KY
September
Weather in September
September experiences a noticeable shift in weather as Somerset transitions into the fall season. Weather conditions involve temperatures dropping to a high of 79.5°F (26.4°C), signaling the end of hot summer days. The city still experiences an ample amount of rainfall, with a cumulative 2.2" (56mm) scattered over 13.2 rainy days. Concurrently, daylight hours start dimming moving from 14 hours in August to 12.4 hours. Nevertheless, September remains a vibrant month with a balance of warm days and cool nights, an indication of the autumn season's arrival.Temperature
September is characterized by a mild reduction in the average high-temperature, from 85.5°F (29.7°C) in August to a still moderately hot 79.5°F (26.4°C). An average low-temperature of 59°F (15°C) is noted during the nights in September in Somerset.Humidity
In September, the average relative humidity is 76%.Rainfall
September is the month with the least rainfall. Rain falls for 13.2 days and accumulates 2.2" (56mm) of precipitation.Snowfall
May through September are months without snowfall.Daylight
In September, the average length of the day in Somerset is 12h and 25min.On the first day of September, sunrise is at 7:09 am and sunset at 8:06 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 7:22 pm EDT.
Sunshine
The average sunshine in September in Somerset is 8.3h.UV index
In Somerset, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for average individuals.Note: In September, the maximum UV index of 5 suggests this advice:
Be vigilant - Suggestions to stave off sun damage are provided. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Somerset, KY
- Average high temperature in September: 79.5°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (41.5°F).
- Average low temperature in September: 59°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (27.5°F).
Average pressure in September
Somerset, 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
Somerset, KY
- Average wind speed in September: 4.7mph
The windiest month (with the highest average wind speed) is February (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.4mph).
Average humidity in September
Somerset, KY
- Average humidity in September: 76%
The months with the highest relative humidity are February and December (80%).
The month with the lowest relative humidity is August (75%).
Average rainfall in September
Somerset, KY
- Average rainfall in September: 2.2"
The wettest month (with the highest rainfall) is February (4.09").
The driest month (with the least rainfall) is September (2.2").
Average rainfall days in September
Somerset, KY
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (11.2 days).
Average snowfall in September
Somerset, KY
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.58").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Somerset, KY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.8 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
Somerset, KY
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 42min).
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 18min).
Average sunshine days in September
Somerset, KY
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is October (16.6 days).
The months with the least sunshine days are February and July (10.1 days).
Average UV index in September
Somerset, 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
Somerset, KY
- Average cloud cover in September: 33
The months with the most cloud cover are January and February (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Somerset, KY
- Average visibility in September: 5mi
The months with the highest visibility are April, June, October and November (6mi).
The months with the lowest visibility are January, February, March, May, July, August, September and December (5mi).
