Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The transition into September involves a small decrease in the average high-temperature, dipping slightly from 85.5°F (29.7°C) in August to a still moderately hot 79.7°F (26.5°C). During September, Clarkson's temperature averages to a mild 60.3°F (15.7°C) at night.Humidity
The average relative humidity in September is 75%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.5 days and typically collects 1.69" (43mm) of precipitation.Snowfall
In Clarkson, snow does not fall in May through October.Daylight
In September, the average length of the day in Clarkson is 12h and 25min.On the first day of September in Clarkson, Kentucky, sunrise is at 6:15 am and sunset at 7:13 pm. On the last day of the month, sunrise is at 6:40 am and sunset at 6:29 pm CDT.
Sunshine
In Clarkson, Kentucky, the average sunshine in September is 8.5h.UV index
In Clarkson, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: In September, an average UV index of 5 transforms into the following instructions:
Take precautions. Light skin individuals may get burned in less than 30 minutes. Minimize direct exposure to the Sun during midday when its radiation is at its peak. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September in Clarkson?
What is the average humidity in September in Clarkson?
What is the driest month in Clarkson?
How many days does it rain in September in Clarkson?
When it does not snow in Clarkson?
What is the average length of the day in September in Clarkson?
When are sunrise and sunset in September in Clarkson?
How many hours of sunshine does Clarkson have in September?
What is the UV index intensity in September in Clarkson?
Average temperature in September
Clarkson, KY
- Average high temperature in September: 79.7°F
The warmest month (with the highest average high temperature) is July (86.7°F).
The month with the lowest average high temperature is January (40.6°F).
- Average low temperature in September: 60.3°F
The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).
Average pressure in September
Clarkson, 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 (29.96"Hg).
Average wind speed in September
Clarkson, KY
- Average wind speed in September: 5.6mph
The windiest month (with the highest average wind speed) is February (8.5mph).
The calmest month (with the lowest average wind speed) is July (5.1mph).
Average humidity in September
Clarkson, KY
- Average humidity in September: 75%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Clarkson, KY
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is April (3.11").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in September
Clarkson, KY
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is November (9.8 days).
Average snowfall in September
Clarkson, KY
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.97").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Clarkson, KY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.6 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
Clarkson, 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 36min).
- Average sunshine in September: 8h and 3min
The months with the most sunshine are June and August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Clarkson, KY
- Average sunshine days in September: 15.2 days
The months with the most sunshine days are October and November (18.5 days).
The month with the least sunshine days is July (10.7 days).
Average UV index in September
Clarkson, 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
Clarkson, KY
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 30).
Average visibility in September
Clarkson, KY
- Average visibility in September: 6mi
The months with the highest visibility are February, March, April, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and May (5mi).
Clarkson, Kentucky, USA
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