September weather forecast
Millstone, KY

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Millstone, Kentucky, with an average temperature ranging between max 77.2°F (25.1°C) and min 55.6°F (13.1°C).

Temperature

September ushers in a minor alteration in Millstone's climate, with the average high-temperature moving from August's 82.8°F (28.2°C) to a still warm 77.2°F (25.1°C). Following the sharp contrast to daytime warmth, an average nighttime temperature of 55.6°F (13.1°C) gets registered in Millstone during September.

Humidity

In September, the average relative humidity is 78%.

Rainfall

The month with the least rainfall is September, when the rain falls for 16.3 days and typically collects 2.48" (63mm) of precipitation.

Snowfall

In Millstone, Kentucky, snow does not fall in June through September.

Daylight

The average length of the day in September is 12h and 25min.
On the first day of September, sunrise is at 7:02 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 7:15 pm EDT.

Sunshine

In Millstone, the average sunshine in September is 8.1h.

UV index

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 4 in September interprets into the following recommendations:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Updated: Jun 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature?

The high-temperature, in September, in Millstone, is 77.2°F (25.1°C), while the low-temperature averages to 55.6°F (13.1°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which represents the influence of relative humidity on air temperature, is calculated to be 89.6°F (32°C).

What is the average humidity in September?

In Millstone, the average relative humidity in September is 78%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 16.3 days and typically collects 2.48" (63mm) of precipitation.

How much does it rain in Millstone in September?

In Millstone, in September, during 16.3 rainfall days, 2.48" (63mm) of precipitation is typically accumulated.

When it does not snow?

In Millstone, snow does not fall in June through September.

Does it snow in Millstone in September?

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

What is the average length of the day in September?

In Millstone, the average day length in September is 12h and 25min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 7:02 am and sunset at 7:59 pm. On the last day of the month, sunrise is at 7:26 am and sunset at 7:15 pm EDT.

How many hours of sunshine does Millstone have in September?

In September, the average sunshine duration is 8.1h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to the Sun's UV radiation.
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
Millstone, KY

Average temperature in September - Millstone, KY
  • Average high temperature in September: 77.2°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (40.1°F).

  • Average low temperature in September: 55.6°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (26.4°F).

Average pressure in September
Millstone, KY

Average pressure in September - Millstone, KY
  • Average pressure in September: 30.05"Hg

The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).

Average wind speed in September
Millstone, KY

Average wind speed in September - Millstone, KY
  • Average wind speed in September: 4.2mph

The windiest month (with the highest average wind speed) is April (6.7mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).

Average humidity in September
Millstone, KY

Average humidity in September - Millstone, KY
  • Average humidity in September: 78%

The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is November (76%).

Average rainfall in September
Millstone, KY

Average rainfall in September - Millstone, KY
  • Average rainfall in September: 2.48"

The wettest month (with the highest rainfall) is February (4.13").
The driest month (with the least rainfall) is September (2.48").

Average rainfall days in September
Millstone, KY

Average rainfall days in September - Millstone, KY
  • Average rainfall days in September: 16.3 days

The months with the highest number of rainy days are May and July (20.8 days).
The month with the least rainy days is February (12.6 days).

Average snowfall in September
Millstone, KY

Average snowfall in September - Millstone, KY
  • Average snowfall in September: 0"

The month with the highest snowfall is January (5").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Millstone, KY

Average snowfall days in September - Millstone, KY
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (11.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Millstone, KY

Average daylight in September / Average sunshine in September - Millstone, 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 1min

The month with the most sunshine is June (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).

Average sunshine days in September
Millstone, KY

Average sunshine days in September - Millstone, KY
  • Average sunshine days in September: 12.2 days

The month with the most sunshine days is November (15.1 days).
The month with the least sunshine days is May (8 days).

Average UV index in September
Millstone, KY

Average UV index in September - Millstone, KY
  • Average UV index in September: 4

The months with the highest UV index are May, June and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in September
Millstone, KY

Average cloud cover in September - Millstone, KY
  • Average cloud cover in September: 37

The month with the most cloud cover is February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 35).

Average visibility in September
Millstone, KY

Average visibility in September - Millstone, KY
  • Average visibility in September: 5mi

The months with the highest visibility are April and November (6mi).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (5mi).

Millstone, Kentucky, USA

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