September weather forecastWinchester, IN
September
Weather in September
The first month of the autumn, September, is still a warm month in Winchester, Indiana, with an average temperature ranging between min 56.3°F (13.5°C) and max 73.8°F (23.2°C).Temperature
The beginning of September reveals an average high-temperature of a still warm 73.8°F (23.2°C), showing minimal deviation from the previous month. Winchester experiences an average low-temperature of 56.3°F (13.5°C) in the month of September.Humidity
In September, the average relative humidity is 79%.Rainfall
In Winchester, in September, during 14.5 rainfall days, 2.05" (52mm) of precipitation is typically accumulated. Throughout the year, there are 169.7 rainfall days, and 31.65" (804mm) of precipitation is accumulated.Snowfall
In Winchester, snow does not fall in May through September.Daylight
The average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 7:08 am and sunset at 8:11 pm. On the last day of September, sunrise is at 7:36 am and sunset at 7:23 pm EDT.
Sunshine
The average sunshine in September is 7.9h.UV index
In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A daily high UV index of 4 in September leads to these guidelines:
Act with care - The need to guard against sun damage is communicated. The mid-day Sun emits the most powerful UV radiation, so seek shade and minimize exposure. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Winchester, IN
- Average high temperature in September: 73.8°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (32°F).
- Average low temperature in September: 56.3°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).
Average pressure in September
Winchester, IN
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Winchester, IN
- Average wind speed in September: 6.8mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Winchester, IN
- Average humidity in September: 79%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (75%).
Average rainfall in September
Winchester, IN
- Average rainfall in September: 2.05"
The wettest month (with the highest rainfall) is May (3.86").
The driest month (with the least rainfall) is February (1.93").
Average rainfall days in September
Winchester, IN
- Average rainfall days in September: 14.5 days
The month with the highest number of rainy days is May (19.9 days).
The months with the least rainy days are January and February (9 days).
Average snowfall in September
Winchester, IN
- Average snowfall in September: 0"
The month with the highest snowfall is December (3.78").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Winchester, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13 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
Winchester, IN
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 7h and 54min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in September
Winchester, IN
- Average sunshine days in September: 13 days
The month with the most sunshine days is November (16 days).
The month with the least sunshine days is May (8.7 days).
Average UV index in September
Winchester, IN
- Average UV index in September: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Winchester, IN
- Average cloud cover in September: 36
The month with the most cloud cover is January (Cloud cover 64).
The months with the least cloud cover are July and August (Cloud cover 33).
Average visibility in September
Winchester, IN
- Average visibility in September: 5mi
The months with the highest visibility are March, April, May, June, October, November and December (6mi).
The months with the lowest visibility are January, February, July, August and September (5mi).
