September weather forecastClayton, IN
September
Weather in September
The first month of the autumn, September, is still a warm month in Clayton, Indiana, with an average temperature varying between 57.7°F (14.3°C) and 75.6°F (24.2°C).Temperature
As August transitions into September, the average high-temperature rests at a still moderately hot 75.6°F (24.2°C), maintaining a close resemblance to the previous month. Throughout the month of September, the average temperature dips to a mild 57.7°F (14.3°C) at night.Humidity
In Clayton, Indiana, the average relative humidity in September is 78%.Rainfall
In September, the rain falls for 11.1 days. Throughout September, 1.14" (29mm) of precipitation is accumulated. In Clayton, Indiana, during the entire year, the rain falls for 140.6 days and collects up to 18.46" (469mm) of precipitation.Snowfall
In Clayton, Indiana, snow does not fall in May through October.Daylight
The average length of the day in September is 12h and 26min.On the first day of September in Clayton, sunrise is at 7:14 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 7:42 am and sunset at 7:29 pm EDT.
Sunshine
In September, the average sunshine is 8.3h.UV index
The average daily maximum UV index in September in Clayton is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the UV index of 5 transforms into the following advice:
Make use of precautions - Suggestions to resist sunburn are communicated. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Clayton, IN
- Average high temperature in September: 75.6°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (32.7°F).
- Average low temperature in September: 57.7°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).
Average pressure in September
Clayton, 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
Clayton, IN
- Average wind speed in September: 6.7mph
The windiest months (with the highest average wind speed) are January and February (10.1mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).
Average humidity in September
Clayton, IN
- Average humidity in September: 78%
The month with the highest relative humidity is July (83%).
The month with the lowest relative humidity is October (74%).
Average rainfall in September
Clayton, IN
- Average rainfall in September: 1.14"
The wettest month (with the highest rainfall) is June (2.44").
The driest month (with the least rainfall) is February (0.91").
Average rainfall days in September
Clayton, IN
- Average rainfall days in September: 11.1 days
The month with the highest number of rainy days is May (17.3 days).
The month with the least rainy days is February (6.5 days).
Average snowfall in September
Clayton, IN
- Average snowfall in September: 0"
The month with the highest snowfall is December (1.65").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Clayton, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (7.2 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
Clayton, 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 18min
The month with the most sunshine is June (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Clayton, IN
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (10.8 days).
Average UV index in September
Clayton, IN
- Average UV index in September: 5
The months with the highest UV index are June and July (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
Clayton, IN
- Average cloud cover in September: 33
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 31).
Average visibility in September
Clayton, IN
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are July and August (5mi).
