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
September's arrival comes with a mild decrease in the average high-temperature, moving subtly from a moderately hot 85.6°F (29.8°C) in August to a still warm 79.3°F (26.3°C). Jeffersontown sees an average low-temperature of 59.9°F (15.5°C) during September.Humidity
The average relative humidity in September is 74%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.3 days and typically collects 0.87" (22mm) of precipitation.Snowfall
In Jeffersontown, snow does not fall in May through October.Daylight
The average length of the day in September in Jeffersontown is 12h and 25min.On the first day of the month, sunrise is at 7:12 am and sunset at 8:11 pm. On the last day of September, sunrise is at 7:37 am and sunset at 7:26 pm EDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In Jeffersontown, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for ordinary individuals.Note: A maximum daily UV index of 5 during September morphs into the following directions:
Be vigilant - A duty to shield skin and eyes from injury exists. It's recommended to limit sun exposure when its radiation is at its peak during midday. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Jeffersontown in September?
What is the average humidity in September?
What is the driest month?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Jeffersontown have in September?
When are sunrise and sunset in September in Jeffersontown?
How long on average sun shines in September?
What is the UV index reading in September?
Average temperature in September
Jeffersontown, KY
- Average high temperature in September: 79.3°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 (39°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is July (67.6°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in September
Jeffersontown, KY
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Jeffersontown, KY
- Average wind speed in September: 5.4mph
The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest months (with the lowest average wind speed) are July and August (4.9mph).
Average humidity in September
Jeffersontown, KY
- Average humidity in September: 74%
The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is August (73%).
Average rainfall in September
Jeffersontown, KY
- Average rainfall in September: 0.87"
The wettest months (with the highest rainfall) are April and May (2.05").
The driest month (with the least rainfall) is September (0.87").
Average rainfall days in September
Jeffersontown, KY
- Average rainfall days in September: 11.3 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in September
Jeffersontown, KY
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.67").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Jeffersontown, KY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.9 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
Jeffersontown, 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 3min
The month with the most sunshine is June (Average sunshine: 10h and 24min).
The month with the least sunshine is December (Average sunshine: 4h and 18min).
Average sunshine days in September
Jeffersontown, KY
- Average sunshine days in September: 16.8 days
The month with the most sunshine days is October (20.4 days).
The month with the least sunshine days is May (12.3 days).
Average UV index in September
Jeffersontown, 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).
Average cloud cover in September
Jeffersontown, KY
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 57).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Jeffersontown, KY
- Average visibility in September: 6mi
The months with the highest visibility are January, March, April, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are February and May (5mi).
Jeffersontown, Kentucky, USA
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