September weather forecastLyons, IN
September
Weather in September
September, the first month of the autumn in Lyons, is also a moderately hot month, with an average temperature ranging between min 59.4°F (15.2°C) and max 77.5°F (25.3°C).Temperature
Transition into September subtly marks a drop in the average high-temperature, moderately moving from a moderately hot 82.9°F (28.3°C) in August to a still warm 77.5°F (25.3°C). Throughout the month of September, the average temperature in Lyons dips to a refreshing 59.4°F (15.2°C) at night.Humidity
The average relative humidity in September in Lyons is 76%.Rainfall
September is the month with the least rainfall. Rain falls for 8 days and accumulates 0.47" (12mm) of precipitation.Snowfall
In Lyons, snow does not fall in April through October.Daylight
In Lyons, the average length of the day in September is 12h and 26min.On the first day of the month, sunrise is at 7:17 am and sunset at 8:18 pm. On the last day of September, sunrise is at 7:44 am and sunset at 7:32 pm EDT.
Sunshine
In September, the average sunshine in Lyons is 8.5h.UV index
In September, the average daily maximum UV index in Lyons is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for average individuals.Note: In September, the average maximum UV index of 5 translates into the following recommendations:
Act with care - The need to guard against sun damage is communicated. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. 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
Lyons, IN
- Average high temperature in September: 77.5°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (36°F).
- Average low temperature in September: 59.4°F
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (23°F).
Average pressure in September
Lyons, IN
- Average pressure in September: 30.03"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Lyons, IN
- Average wind speed in September: 6.4mph
The windiest month (with the highest average wind speed) is February (9.4mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).
Average humidity in September
Lyons, IN
- Average humidity in September: 76%
The months with the highest relative humidity are May and July (81%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Lyons, IN
- Average rainfall in September: 0.47"
The wettest month (with the highest rainfall) is April (1.06").
The driest month (with the least rainfall) is September (0.47").
Average rainfall days in September
Lyons, IN
- Average rainfall days in September: 8 days
The month with the highest number of rainy days is May (13.8 days).
The month with the least rainy days is December (6.1 days).
Average snowfall in September
Lyons, IN
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.47").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Lyons, IN
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (6.3 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
Lyons, 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 30min
The months with the most sunshine are June and July (Average sunshine: 10h and 12min).
The month with the least sunshine is December (Average sunshine: 4h and 24min).
Average sunshine days in September
Lyons, IN
- Average sunshine days in September: 19.5 days
The month with the most sunshine days is October (21.7 days).
The month with the least sunshine days is May (13.8 days).
Average UV index in September
Lyons, IN
- Average UV index in September: 5
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, November and December (UV index 2).
Average cloud cover in September
Lyons, IN
- Average cloud cover in September: 31
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is August (Cloud cover 29).
Average visibility in September
Lyons, 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).
