September weather forecastRoselawn, IN
September
Weather in September
September, the first month of the autumn in Roselawn, is still a warm month, with an average temperature varying between 74.7°F (23.7°C) and 56.8°F (13.8°C).Temperature
As August transitions into September, Roselawn records an average high-temperature of a still moderately hot 74.7°F (23.7°C), showing a gentle shift from the preceding month. Roselawn throughout September, experiences an average nighttime temperature of 56.8°F (13.8°C).Humidity
In Roselawn, the average relative humidity in September is 78%.Rainfall
In September, in Roselawn, the rain falls for 12.4 days. Throughout September, 1.46" (37mm) of precipitation is accumulated. In Roselawn, during the entire year, the rain falls for 153.9 days and collects up to 23.46" (596mm) of precipitation.Snowfall
In Roselawn, snow does not fall in May through October.Daylight
In Roselawn, the average length of the day in September is 12h and 28min.On the first day of September in Roselawn, sunrise is at 6:16 am and sunset at 7:21 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:32 pm CDT.
Sunshine
In September, the average sunshine is 8.5h.UV index
In Roselawn, Indiana, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV radiation for the average person.Note: The average daily UV index of 4 in September transforms into the following instructions:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Roselawn, IN
- Average high temperature in September: 74.7°F
The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (30.2°F).
- Average low temperature in September: 56.8°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (19°F).
Average pressure in September
Roselawn, IN
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Roselawn, IN
- Average wind speed in September: 7.1mph
The windiest month (with the highest average wind speed) is January (10.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).
Average humidity in September
Roselawn, IN
- Average humidity in September: 78%
The month with the highest relative humidity is July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Roselawn, IN
- Average rainfall in September: 1.46"
The wettest month (with the highest rainfall) is May (3.31").
The driest month (with the least rainfall) is January (1.1").
Average rainfall days in September
Roselawn, IN
- Average rainfall days in September: 12.4 days
The month with the highest number of rainy days is May (17.9 days).
The month with the least rainy days is January (6.6 days).
Average snowfall in September
Roselawn, IN
- Average snowfall in September: 0"
The month with the highest snowfall is February (3.5").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Roselawn, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (13.2 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
Roselawn, IN
- Average daylight in September: 12h and 30min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 8h and 30min
The months with the most sunshine are July and August (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 42min).
Average sunshine days in September
Roselawn, IN
- Average sunshine days in September: 14.6 days
The month with the most sunshine days is November (17.5 days).
The months with the least sunshine days are June and July (10.3 days).
Average UV index in September
Roselawn, IN
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in September
Roselawn, IN
- Average cloud cover in September: 34
The month with the most cloud cover is January (Cloud cover 61).
The month with the least cloud cover is August (Cloud cover 33).
Average visibility in September
Roselawn, IN
- Average visibility in September: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
