September weather forecastGrassy Creek, KY
September
Weather in September
The first month of the autumn, September, is also a moderately hot month in Grassy Creek, Kentucky, with temperature in the range of an average high of 79°F (26.1°C) and an average low of 57.7°F (14.3°C).Temperature
The shift from August to September includes a small decrease in the average high-temperature, from 85.5°F (29.7°C) to a still moderately hot 79°F (26.1°C). Grassy Creek experiences an average temperature drop to a mild 57.7°F (14.3°C) during September nights.Humidity
In September, the average relative humidity is 76%.Rainfall
September and November are months with the least rain when the rain falls for 12.8 days and typically aggregates up to 1.89" (48mm) of rain.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in September in Grassy Creek, Kentucky, is 12h and 25min.On the first day of September, sunrise is at 7:03 am and sunset at 8:02 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 7:17 pm EDT.
Sunshine
The average sunshine in September is 8.2h.UV index
The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: In September, the UV index of 4 transforms into the following advice:
Proceed with care. Light skin individuals may be exposed to burns in fewer than 30 minutes. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Grassy Creek, KY
- Average high temperature in September: 79°F
The warmest month (with the highest average high temperature) is July (86.9°F).
The month with the lowest average high temperature is January (39.7°F).
- Average low temperature in September: 57.7°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (26.1°F).
Average pressure in September
Grassy Creek, 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 (29.97"Hg).
Average wind speed in September
Grassy Creek, KY
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is January (7.4mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).
Average humidity in September
Grassy Creek, KY
- Average humidity in September: 76%
The month with the highest relative humidity is February (81%).
The months with the lowest relative humidity are June, August and November (75%).
Average rainfall in September
Grassy Creek, KY
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is February (2.99").
The driest months (with the least rainfall) are September and November (1.89").
Average rainfall days in September
Grassy Creek, KY
- Average rainfall days in September: 12.8 days
The months with the highest number of rainy days are May and July (17.3 days).
The month with the least rainy days is November (9.7 days).
Average snowfall in September
Grassy Creek, KY
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.23").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Grassy Creek, KY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grassy Creek, KY
- Average daylight in September: 12h and 24min
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 12min
The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Grassy Creek, KY
- Average sunshine days in September: 15.6 days
The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is February (10.3 days).
Average UV index in September
Grassy Creek, 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
Grassy Creek, KY
- Average cloud cover in September: 35
The months with the most cloud cover are January and February (Cloud cover 60).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Grassy Creek, KY
- Average visibility in September: 5mi
The months with the highest visibility are March, April, October and November (6mi).
The months with the lowest visibility are January, February, May, June, July, August, September and December (5mi).
