September weather forecastBoston, KY
September
Weather in September
The first month of the autumn, September, is still a warm month in Boston, Kentucky, with an average temperature fluctuating between 79.5°F (26.4°C) and 59.9°F (15.5°C).Temperature
The beginning of September brings a slight decrease in the average high-temperature, transitioning from a warm 85.6°F (29.8°C) in August to a still moderately hot 79.5°F (26.4°C). Throughout the nights in September, an average low-temperature of 59.9°F (15.5°C) is noted.Humidity
August through October, with an average relative humidity of 74%, are the least humid months.Rainfall
September is the month with the least rainfall. Rain falls for 13.5 days and accumulates 1.93" (49mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day is 12h and 25min.On the first day of September, sunrise is at 7:13 am and sunset at 8:11 pm. On the last day of the month, sunrise is at 7:38 am and sunset at 7:26 pm EDT.
Sunshine
In Boston, Kentucky, the average sunshine in September is 8.4h.UV index
The average daily maximum UV index in September in Boston, Kentucky, is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: The maximum daily UV index of 5 during September translates into the following directions:
Exercise prevention - Warding off sunburn is urged. It's recommended to limit sun exposure when its radiation is at its peak during midday. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Boston, KY
- Average high temperature in September: 79.5°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 (39.7°F).
- Average low temperature in September: 59.9°F
The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (26.6°F).
Average pressure in September
Boston, KY
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in September
Boston, KY
- Average wind speed in September: 5.3mph
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 (4.8mph).
Average humidity in September
Boston, KY
- Average humidity in September: 74%
The months with the highest relative humidity are February and December (80%).
The months with the lowest relative humidity are August, September and October (74%).
Average rainfall in September
Boston, KY
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is April (3.46").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in September
Boston, KY
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (9.8 days).
Average snowfall in September
Boston, KY
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.17").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Boston, KY
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (6.7 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
Boston, 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 24min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The months with the least sunshine are January and December (Average sunshine: 4h and 30min).
Average sunshine days in September
Boston, KY
- Average sunshine days in September: 15 days
The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is May (10.4 days).
Average UV index in September
Boston, 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, November and December (UV index 2).
Average cloud cover in September
Boston, KY
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Boston, KY
- Average visibility in September: 6mi
The months with the highest visibility are March, April, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and May (5mi).
