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
In Isom, the average high-temperature in September slightly decreases from a warm 82.8°F (28.2°C) in August to a still moderately hot 77.4°F (25.2°C). Against the backdrop of high daytime temperatures, an average low-temperature of 54.9°F (12.7°C) is noted during September nights.Humidity
In September, the average relative humidity is 78%.Rainfall
September is the month with the least rainfall. Rain falls for 14 days and accumulates 1.65" (42mm) of precipitation.Snowfall
In Isom, Kentucky, snow does not fall in June through September.Daylight
In September, the average length of the day 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 September, the average sunshine in Isom is 8.1h.UV index
The average daily maximum UV index in September in Isom is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: The UV index of 4 during September translates into the following guidance:
Be vigilant - Suggestions to stave off sun damage are provided. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Isom in September?
What is the average humidity in September in Isom?
What is the driest month in Isom?
How much does it rain in Isom in September?
When it does not snow in Isom?
Does it snow in Isom in September?
How many hours of daylight does Isom have in September?
What time are sunrise and sunset in September in Isom?
How long on average sun shines in September in Isom?
What is the UV index reading in September in Isom?
Average temperature in September
Isom, KY
- Average high temperature in September: 77.4°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (39.9°F).
- Average low temperature in September: 54.9°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in September
Isom, KY
- Average pressure in September: 30.06"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
Isom, KY
- Average wind speed in September: 4.1mph
The windiest month (with the highest average wind speed) is April (6.8mph).
The calmest month (with the lowest average wind speed) is August (3.9mph).
Average humidity in September
Isom, KY
- Average humidity in September: 78%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are April and November (76%).
Average rainfall in September
Isom, KY
- Average rainfall in September: 1.65"
The wettest month (with the highest rainfall) is February (3.7").
The driest month (with the least rainfall) is September (1.65").
Average rainfall days in September
Isom, KY
- Average rainfall days in September: 14 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is November (9.4 days).
Average snowfall in September
Isom, KY
- Average snowfall in September: 0"
The month with the highest snowfall is February (5.59").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Isom, KY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (9.4 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Isom, 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 August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Isom, KY
- Average sunshine days in September: 14.3 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in September
Isom, KY
- Average UV index in September: 4
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
Isom, KY
- Average cloud cover in September: 38
The months with the most cloud cover are January and February (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 35).
Average visibility in September
Isom, 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).
Isom, Kentucky, USA
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