September weather forecastWheaton, MO
September
Weather in September
September, the first month of the autumn in Wheaton, is also a moderately hot month, with an average temperature fluctuating between 60.4°F (15.8°C) and 80.1°F (26.7°C).Temperature
The start of September signals a gentle decrease in the average high-temperature, transitioning from a tropical 87.3°F (30.7°C) in August to a warm 80.1°F (26.7°C). In September, Wheaton records an average nighttime temperature of 60.4°F (15.8°C).Humidity
In September, the average relative humidity is 74%.Rainfall
In September, the rain falls for 13.5 days. Throughout September, 2.68" (68mm) of precipitation is accumulated. In Wheaton, during the entire year, the rain falls for 152.1 days and collects up to 34.45" (875mm) of precipitation.Snowfall
In Wheaton, snow does not fall in June through October.Daylight
In Wheaton, the average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:47 am and sunset at 7:44 pm. On the last day of September, sunrise is at 7:11 am and sunset at 7:00 pm CDT.
Sunshine
In Wheaton, the average sunshine in September is 9.3h.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 ordinary individuals.Note: The average daily UV index of 5 in September transforms into the following instructions:
Guard yourself - Precautionary measures against sun damage are advocated. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Wheaton, MO
- Average high temperature in September: 80.1°F
The warmest month (with the highest average high temperature) is July (88.9°F).
The month with the lowest average high temperature is January (42.4°F).
- Average low temperature in September: 60.4°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (27°F).
Average pressure in September
Wheaton, MO
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Wheaton, MO
- Average wind speed in September: 7.2mph
The windiest months (with the highest average wind speed) are March and April (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.6mph).
Average humidity in September
Wheaton, MO
- Average humidity in September: 74%
The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are January, July, August and October (73%).
Average rainfall in September
Wheaton, MO
- Average rainfall in September: 2.68"
The wettest month (with the highest rainfall) is May (5").
The driest month (with the least rainfall) is February (1.65").
Average rainfall days in September
Wheaton, MO
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is January (7.4 days).
Average snowfall in September
Wheaton, MO
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (2.17").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in September
Wheaton, MO
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Wheaton, MO
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 9h and 18min
The months with the most sunshine are June and July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 5h and 18min).
Average sunshine days in September
Wheaton, MO
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is December (20.5 days).
The month with the least sunshine days is July (11.4 days).
Average UV index in September
Wheaton, MO
- 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 and December (UV index 2).
Average cloud cover in September
Wheaton, MO
- Average cloud cover in September: 29
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in September
Wheaton, MO
- 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).
