Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
Saint Charles's average high-temperature in September sits at a moderately hot 84.9°F (29.4°C), showing little difference from the previous month. In the month of September, Saint Charles records a consistent average low-temperature of 66.2°F (19°C).Heat index
In September, the average heat index is computed to be a hot 93.2°F (34°C). Adopt enhanced safety measures, heat exhaustion and heat cramps could occur. Continuous activity may induce heatstroke.Remember that heat index calculations are made for conditions in the shade with light wind. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'real feel' or 'feels like', combines air temperature and relative humidity to represent a human perceived temperature equivalent. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Understand that direct sun rays can influence the weather's impact, leading to an increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. Kids generally face higher risks than adults as they sweat less. Along with their large skin surface compared to their small bodies and higher heat production due to their activities, their vulnerability is increased.
Humidity
The average relative humidity in September is 72%.Rainfall
September is the month with the least rainfall. Rain falls for 13.5 days and accumulates 2.28" (58mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In Saint Charles, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:38 am and sunset at 7:30 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:49 pm CDT.
Sunshine
In September, the average sunshine is 9.9h.UV index
In Saint Charles, the average daily maximum UV index in September is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.Note: A maximum high daily UV index of 5 during September translates into the following directions:
Adopt protective measures - It is advised to guard against sun damage. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
Frequently asked questions
Is it hot in Saint Charles during September?
What is the average humidity in September in Saint Charles?
What is the driest month in Saint Charles?
How many days does it rain in September in Saint Charles?
When it does not snow in Saint Charles?
How many hours of daylight does Saint Charles have in September?
When is the sunrise / sunset in September in Saint Charles?
How long on average sun shines in September in Saint Charles?
What is the UV index reading in September in Saint Charles?
Average temperature in September
Saint Charles, AR
- Average high temperature in September: 84.9°F
The warmest month (with the highest average high temperature) is July (90.1°F).
The month with the lowest average high temperature is January (49.3°F).
- Average low temperature in September: 66.2°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (36°F).
Average pressure in September
Saint Charles, AR
- Average pressure in September: 30"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed in September
Saint Charles, AR
- Average wind speed in September: 5.7mph
The windiest month (with the highest average wind speed) is February (9.5mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in September
Saint Charles, AR
- Average humidity in September: 72%
The months with the highest relative humidity are March and December (78%).
The month with the lowest relative humidity is October (67%).
Average rainfall in September
Saint Charles, AR
- Average rainfall in September: 2.28"
The wettest month (with the highest rainfall) is April (4.8").
The driest month (with the least rainfall) is September (2.28").
Average rainfall days in September
Saint Charles, AR
- Average rainfall days in September: 13.5 days
The month with the highest number of rainy days is July (18.2 days).
The month with the least rainy days is October (9.5 days).
Average snowfall in September
Saint Charles, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.79").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Saint Charles, AR
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (1.3 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Saint Charles, AR
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 9h and 5min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).
Average sunshine days in September
Saint Charles, AR
- Average sunshine days in September: 14 days
The month with the most sunshine days is October (19.9 days).
The month with the least sunshine days is August (10.3 days).
Average UV index in September
Saint Charles, AR
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
Saint Charles, AR
- Average cloud cover in September: 27
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 24).
Average visibility in September
Saint Charles, AR
- 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).
Saint Charles, Arkansas, USA
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