September weather forecastKeo, AR
September
Weather in September
September, the first month of the autumn in Keo, is still a warm month, with temperature in the range of an average high of 84°F (28.9°C) and an average low of 65.1°F (18.4°C).Temperature
The shift from August to September coincides with a small decrease in the average high-temperature, down to a warm 84°F (28.9°C) from a hot 89.6°F (32°C). During September, Keo's temperature falls to a steady low-temperature average of 65.1°F (18.4°C).Heat index
September's mean heat index is evaluated at a tropical 91.4°F (33°C). Exercise enhanced safety steps, heat cramps and heat exhaustion are probable. Heatstroke could be a result of sustained activity.In reference to the heat index, it's for places in shade and with a slight wind. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'real feel', evaluates the perceived heat by adding the effect of moisture in the air. The influence of weather is personal, differing among individuals based on variations in body mass, stature, and the degree of physical exertion. It is essential to realize that direct sunlight can escalate the perceived temperature, increasing the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values hold great significance to children. Youths are typically more endangered than adults since they usually sweat less. Their larger skin surface concerning their smaller bodies and higher heat production due to activity further adds to their vulnerability.
Humidity
In Keo, Arkansas, the average relative humidity in September is 72%.Rainfall
In Keo, during September, the rain falls for 11.5 days and regularly aggregates up to 1.61" (41mm) of precipitation. In Keo, during the entire year, the rain falls for 139.8 days and collects up to 23.66" (601mm) of precipitation.Snowfall
In Keo, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 23min.On the first day of the month, sunrise is at 6:41 am and sunset at 7:33 pm. On the last day of September, in Keo, sunrise is at 7:02 am and sunset at 6:53 pm CDT.
Sunshine
In Keo, the average sunshine in September is 9.6h.UV index
In September, the average daily maximum UV index is 6. A UV Index estimate of 6 to 7 represents a high health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A maximum daily UV index of 6 during September morphs into the following directions:
Evade overexposure. Individuals with fair skin risk burning in under 20 minutes. Limit your direct sun exposure, especially between 10 a.m. and 4 p.m., when UV radiation is strongest. Shade structures might not provide complete sun protection. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Keo, AR
- Average high temperature in September: 84°F
The warmest month (with the highest average high temperature) is July (91.2°F).
The month with the lowest average high temperature is January (48.7°F).
- Average low temperature in September: 65.1°F
The month with the highest average low temperature is July (72.1°F).
The coldest month (with the lowest average low temperature) is January (34.3°F).
Average pressure in September
Keo, AR
- Average pressure in September: 30.01"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
Keo, AR
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is February (8.8mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).
Average humidity in September
Keo, AR
- Average humidity in September: 72%
The month with the highest relative humidity is March (78%).
The month with the lowest relative humidity is October (68%).
Average rainfall in September
Keo, AR
- Average rainfall in September: 1.61"
The wettest month (with the highest rainfall) is April (2.76").
The driest month (with the least rainfall) is January (1.34").
Average rainfall days in September
Keo, AR
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is July (17.6 days).
The month with the least rainy days is November (8.6 days).
Average snowfall in September
Keo, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.51").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Keo, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.6 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
Keo, AR
- Average daylight in September: 12h and 24min
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 36min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 0min).
Average sunshine days in September
Keo, AR
- Average sunshine days in September: 16 days
The month with the most sunshine days is October (21.1 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in September
Keo, AR
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 3).
Average cloud cover in September
Keo, AR
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is June (Cloud cover 24).
Average visibility in September
Keo, 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).
