September weather forecast
Somerset, KY

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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.
Updated: Feb 12, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Somerset in September?

In Somerset, 79.5°F (26.4°C) is the average high-temperature and 59°F (15°C) is the average low-temperature during September. The average heat index (a.k.a. 'real feel', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is calculated to be 95°F (35°C).

What is the average humidity in September in Somerset?

The average relative humidity in September in Somerset is 76%.

What is the driest month in Somerset?

The month with the least rainfall in Somerset, Kentucky, is September, when the rain falls for 13.2 days and typically collects 2.2" (56mm) of precipitation.

How many days does it rain in September in Somerset?

In Somerset, Kentucky, in September, during 13.2 rainfall days, 2.2" (56mm) of precipitation is typically accumulated.

When it does not snow in Somerset?

In Somerset, snow does not fall in May through September.

Does it snow in Somerset in September?

In Somerset, Kentucky, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Somerset?

The average day length in September in Somerset, Kentucky, is 12h and 25min.

When are sunrise and sunset in September in Somerset?

On the first day of September in Somerset, 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.

How long on average sun shines in September in Somerset?

In Somerset, Kentucky, the average sunshine duration in September is 8.3h.

What is the UV index reading in September in Somerset?

In Somerset, Kentucky, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Somerset, KY

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 - 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 - 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 - 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 - 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 - 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 - 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 - 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 / Average sunshine in September - Somerset, KY
  • Average daylight in September: 12h and 2min

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 2min

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 - 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 - 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 - 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 - 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).

Somerset, Kentucky, USA

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