September weather forecastSemiway, KY
September
Weather in September
The first month of the autumn, September, is still a warm month in Semiway, Kentucky, with an average temperature fluctuating between 79.9°F (26.6°C) and 61.2°F (16.2°C).Temperature
With the onset of September, the average high-temperature subtly recedes from August's moderately hot 85.6°F (29.8°C) to a still warm 79.9°F (26.6°C). Throughout September, Semiway's nights cool down to an average of 61.2°F (16.2°C).Humidity
The average relative humidity in September is 74%.Rainfall
September is the month with the least rainfall. Rain falls for 7.7 days and accumulates 0.35" (9mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
The average length of the day in September is 12h and 25min.On the first day of the month, sunrise is at 6:19 am and sunset at 7:17 pm. On the last day of September, sunrise is at 6:44 am and sunset at 6:33 pm CDT.
Sunshine
In Semiway, the average sunshine in September is 8.7h.UV index
In Semiway, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for the average person.Note: During September, 5 as the daily maximum UV index converts into the following advice:
Make use of precautions - Shielding skin and eyes from injury is a requirement. Around midday, solar radiation is most harmful; hence, exposure should be limited. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Semiway, KY
- Average high temperature in September: 79.9°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (40.3°F).
- Average low temperature in September: 61.2°F
The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (27.9°F).
Average pressure in September
Semiway, 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 (29.95"Hg).
Average wind speed in September
Semiway, KY
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is February (9.2mph).
The calmest month (with the lowest average wind speed) is July (5.4mph).
Average humidity in September
Semiway, KY
- Average humidity in September: 74%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Semiway, KY
- Average rainfall in September: 0.35"
The wettest month (with the highest rainfall) is February (1.18").
The driest month (with the least rainfall) is September (0.35").
Average rainfall days in September
Semiway, KY
- Average rainfall days in September: 7.7 days
The month with the highest number of rainy days is July (13.1 days).
The month with the least rainy days is November (6.9 days).
Average snowfall in September
Semiway, KY
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.63").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Semiway, KY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (3.7 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
Semiway, 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 42min
The months with the most sunshine are June, July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 18min).
Average sunshine days in September
Semiway, KY
- Average sunshine days in September: 18.3 days
The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is July (14.8 days).
Average UV index in September
Semiway, 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
Semiway, KY
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in September
Semiway, KY
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
