September weather forecast
Frankfort, KY

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The Capitol Building in Frankfort, Kentucky, during autumn
The Capitol Building in Frankfort, Kentucky, during autumn

Weather in September

September bridges the gap between summer and autumn, with temperatures continuing their gradual descent. The increased wind activity from August spills over, signalling the onset of the autumn breezes. The rainfall total circles down to 1.54" (39mm), making it a relatively dry month compared to the rest of the year. The decrease in daylight and sunshine hours mark the diminishing days of summer. It's a time for shedding layers and welcoming the upcoming fall foliage in Frankfort.

Temperature

Frankfort's progression into September involves a gentle drop in the average high-temperature, from 84.7°F (29.3°C) in August to a still moderately hot 78.8°F (26°C). Throughout September, the average low-temperature records at a mild 59.7°F (15.4°C).

Humidity

The average relative humidity in September is 75%.

Rainfall

The month with the least rainfall in Frankfort, Kentucky, is September, when the rain falls for 12 days and typically collects 1.54" (39mm) of precipitation.

Snowfall

In Frankfort, Kentucky, snow does not fall in May through September.

Daylight

In Frankfort, the average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 7:09 am and sunset at 8:08 pm. On the last day of September, sunrise is at 7:34 am and sunset at 7:23 pm EDT.

Sunshine

In September, the average sunshine is 8.3h.

UV index

In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.
Note: The UV index of 5 during September leads to these advisories:
Adopt protective measures - Suggestions to resist sunburn are offered. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. During bright days, sunglasses that offer UVA and UVB defense are recommended.
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Frequently asked questions

What are September temperatures in Frankfort?

The high-temperature, in September, in Frankfort, records 78.8°F (26°C), while the low-temperature is 59.7°F (15.4°C). In August, the average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, is computed to be 93.2°F (34°C).

What is the average humidity in September in Frankfort?

In Frankfort, the average relative humidity in September is 75%.

What is the driest month in Frankfort?

September is the month with the least rainfall in Frankfort. Rain falls for 12 days and accumulates 1.54" (39mm) of precipitation.

How much does it rain in Frankfort in September?

In September, in Frankfort, Kentucky, the rain falls for 12 days. Throughout September, 1.54" (39mm) of precipitation is accumulated.

When it does not snow in Frankfort?

In Frankfort, Kentucky, snow does not fall in May through September.

Does it snow in Frankfort in September?

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

How many hours of daylight does Frankfort have in September?

The average day length in September in Frankfort is 12h and 25min.

What time are sunrise and sunset in September in Frankfort?

On the first day of September in Frankfort, Kentucky, sunrise is at 7:09 am and sunset at 8:08 pm. On the last day of the month, sunrise is at 7:34 am and sunset at 7:23 pm EDT.

How long on average sun shines in September in Frankfort?

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

What is the UV index reading in September in Frankfort?

In Frankfort, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium hazard to health from unprotected exposure to 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
Frankfort, KY

Average temperature in September - Frankfort, KY
  • Average high temperature in September: 78.8°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (38.8°F).

  • Average low temperature in September: 59.7°F

The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).

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Average pressure in September
Frankfort, KY

Average pressure in September - Frankfort, KY
  • Average pressure in September: 30.03"Hg

The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed in September
Frankfort, KY

Average wind speed in September - Frankfort, KY
  • Average wind speed in September: 5.5mph

The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).

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Average humidity in September
Frankfort, KY

Average humidity in September - Frankfort, KY
  • Average humidity in September: 75%

The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is August (74%).

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Average rainfall in September
Frankfort, KY

Average rainfall in September - Frankfort, KY
  • Average rainfall in September: 1.54"

The wettest month (with the highest rainfall) is April (2.72").
The driest month (with the least rainfall) is September (1.54").

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Average rainfall days in September
Frankfort, KY

Average rainfall days in September - Frankfort, KY
  • Average rainfall days in September: 12 days

The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is November (9.1 days).

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Average snowfall in September
Frankfort, KY

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

The month with the highest snowfall is February (1.61").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Frankfort, KY

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

The month with the highest number of snowfall days is January (8.6 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

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

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 36min).

  • Average sunshine in September: 8h and 2min

The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).

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Average sunshine days in September
Frankfort, KY

Average sunshine days in September - Frankfort, KY
  • Average sunshine days in September: 15.8 days

The month with the most sunshine days is October (18.8 days).
The month with the least sunshine days is May (11.3 days).

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Average UV index in September
Frankfort, KY

Average UV index in September - Frankfort, KY
  • Average UV index in September: 5

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

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Average cloud cover in September
Frankfort, KY

Average cloud cover in September - Frankfort, KY
  • Average cloud cover in September: 33

The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in September
Frankfort, KY

Average visibility in September - Frankfort, KY
  • Average visibility in September: 6mi

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

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Frankfort, Kentucky, USA

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