September weather forecastSaint Leon, IN
September
Weather in September
September, the first month of the autumn in Saint Leon, is also a moderately hot month, with an average temperature fluctuating between 76.8°F (24.9°C) and 58.5°F (14.7°C).Temperature
September reveals a small adjustment in temperature, transitioning from an average high of a moderately hot 82.6°F (28.1°C) in August to a still warm 76.8°F (24.9°C). Saint Leon records an average nighttime low-temperature of 58.5°F (14.7°C) throughout September.Humidity
September and October, with an average relative humidity of 75%, are the least humid months.Rainfall
The month with the least rainfall in Saint Leon is September, when the rain falls for 12.5 days and typically collects 1.38" (35mm) of precipitation.Snowfall
In Saint Leon, snow does not fall in May through September.Daylight
In Saint Leon, Indiana, the average length of the day in September is 12h and 26min.On the first day of September, sunrise is at 7:09 am and sunset at 8:10 pm. On the last day of the month, sunrise is at 7:35 am and sunset at 7:23 pm EDT.
Sunshine
In Saint Leon, the average sunshine in September is 8.4h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 5 suggests this advice:
Adopt protective measures - Suggestions to resist sunburn are offered. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Saint Leon, IN
- Average high temperature in September: 76.8°F
The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.2°F).
- Average low temperature in September: 58.5°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).
Average pressure in September
Saint Leon, IN
- Average pressure in September: 30.03"Hg
The months with the highest atmospheric pressure are January and November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Saint Leon, IN
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is January (9mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).
Average humidity in September
Saint Leon, IN
- Average humidity in September: 75%
The month with the highest relative humidity is December (82%).
The months with the lowest relative humidity are September and October (75%).
Average rainfall in September
Saint Leon, IN
- Average rainfall in September: 1.38"
The wettest month (with the highest rainfall) is May (2.76").
The driest month (with the least rainfall) is September (1.38").
Average rainfall days in September
Saint Leon, IN
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is February (7.9 days).
Average snowfall in September
Saint Leon, IN
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.85").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in September
Saint Leon, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (8.1 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
Saint Leon, 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 30min).
- Average sunshine in September: 8h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in September
Saint Leon, IN
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (10.7 days).
Average UV index in September
Saint Leon, IN
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The month with the lowest UV index is December (UV index 1).
Average cloud cover in September
Saint Leon, 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 27).
Average visibility in September
Saint Leon, 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).
