September weather forecastKeystone Manor, IN
September
Weather in September
September, the first month of the autumn in Keystone Manor, is still a warm month, with temperature in the range of an average low of 58.3°F (14.6°C) and an average high of 75.9°F (24.4°C).Temperature
The average high-temperature during September registers at a still moderately hot 75.9°F (24.4°C), maintaining a close resemblance to the previous month. In September, Keystone Manor experiences a temperature dip to an average of 58.3°F (14.6°C) at night.Humidity
The average relative humidity in September is 76%.Rainfall
In Keystone Manor, during September, the rain falls for 12.2 days and regularly aggregates up to 1.46" (37mm) of precipitation. In Keystone Manor, during the entire year, the rain falls for 146.4 days and collects up to 21.14" (537mm) of precipitation.Snowfall
In Keystone Manor, snow does not fall in May through October.Daylight
In Keystone Manor, Indiana, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 7:13 am and sunset at 8:15 pm. On the last day of September, sunrise is at 7:41 am and sunset at 7:28 pm EDT.
Sunshine
In September, the average sunshine is 8.4h.UV index
In September, the average daily maximum UV index in Keystone Manor is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum high daily UV index of 4 during September translates into the following directions:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Keystone Manor, IN
- Average high temperature in September: 75.9°F
The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (33.4°F).
- Average low temperature in September: 58.3°F
The month with the highest average low temperature is July (66.2°F).
The coldest month (with the lowest average low temperature) is January (21°F).
Average pressure in September
Keystone Manor, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Keystone Manor, IN
- Average wind speed in September: 6.5mph
The windiest months (with the highest average wind speed) are January and February (9.8mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).
Average humidity in September
Keystone Manor, IN
- Average humidity in September: 76%
The month with the highest relative humidity is December (82%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Keystone Manor, IN
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is May (2.68").
The driest month (with the least rainfall) is February (1.22").
Average rainfall days in September
Keystone Manor, IN
- Average rainfall days in September: 12.2 days
The month with the highest number of rainy days is May (17.6 days).
The month with the least rainy days is February (6.8 days).
Average snowfall in September
Keystone Manor, IN
- Average snowfall in September: 0"
The month with the highest snowfall is December (2.28").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Keystone Manor, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Keystone Manor, IN
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
- Average sunshine in September: 8h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Keystone Manor, IN
- Average sunshine days in September: 15.2 days
The month with the most sunshine days is October (18.6 days).
The month with the least sunshine days is May (11.1 days).
Average UV index in September
Keystone Manor, IN
- 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, October, November and December (UV index 2).
Average cloud cover in September
Keystone Manor, IN
- Average cloud cover in September: 32
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Keystone Manor, IN
- 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).
