September weather forecastChatterton, IN
September
Weather in September
September, the first month of the autumn in Chatterton, is also a moderately hot month, with an average temperature fluctuating between 57°F (13.9°C) and 75.4°F (24.1°C).Temperature
Chatterton's September showcases an average high-temperature of a still moderately hot 75.4°F (24.1°C), hardly distinct from August's 79.9°F (26.6°C). In September, Chatterton reports a consistent average low-temperature of 57°F (13.9°C) during the nights.Humidity
In Chatterton, the average relative humidity in September is 78%.Rainfall
In Chatterton, during September, the rain falls for 11 days and regularly aggregates up to 1.06" (27mm) of precipitation. Throughout the year, there are 141.9 rainfall days, and 18.07" (459mm) of precipitation is accumulated.Snowfall
In Chatterton, snow does not fall in May through October.Daylight
The average length of the day in September is 12h and 27min.On the first day of September, sunrise is at 7:17 am and sunset at 8:20 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 7:32 pm EDT.
Sunshine
In September, the average sunshine is 8.1h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 5 during September leads to these instructions:
Make use of precautions - It is urged to ward off sun damage. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Chatterton, IN
- Average high temperature in September: 75.4°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (31.1°F).
- Average low temperature in September: 57°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (19.4°F).
Average pressure in September
Chatterton, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Chatterton, IN
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.3mph).
Average humidity in September
Chatterton, IN
- Average humidity in September: 78%
The month with the highest relative humidity is July (85%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Chatterton, IN
- Average rainfall in September: 1.06"
The wettest month (with the highest rainfall) is May (2.4").
The driest month (with the least rainfall) is February (0.79").
Average rainfall days in September
Chatterton, IN
- Average rainfall days in September: 11 days
The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (5.8 days).
Average snowfall in September
Chatterton, IN
- Average snowfall in September: 0"
The month with the highest snowfall is January (2.13").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Chatterton, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (11 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Chatterton, 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 18min).
- Average sunshine in September: 8h and 6min
The months with the most sunshine are June and July (Average sunshine: 9h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in September
Chatterton, IN
- Average sunshine days in September: 16.6 days
The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is July (10.8 days).
Average UV index in September
Chatterton, IN
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Chatterton, IN
- Average cloud cover in September: 35
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 34).
Average visibility in September
Chatterton, 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).
