September weather forecastShirley, AR
September
Weather in September
September, the first month of the autumn in Shirley, is still a warm month, with an average temperature ranging between max 82°F (27.8°C) and min 61.9°F (16.6°C).Temperature
In September, the average high-temperature marginally decreases from a hot 89.2°F (31.8°C) in August to a warm 82°F (27.8°C). The mean low-temperature during September nights is a comfortable 61.9°F (16.6°C).Heat index
September's mean heat index is evaluated at a hot 87.8°F (31°C). A sense of exhaustion might occur with extended exposure and activity, potentially causing heat cramps.From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. The presence of direct sunlight can raise the heat index values by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', joins air temperature with relative humidity to produce a temperature perception for humans. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Consider the fact that direct sun exposure can influence how hot one feels, potentially raising the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to children. In general, children are more at risk than adults because they sweat less. Furthermore, the large skin surface compared to their small bodies and the high heat production due to their actions contribute to this vulnerability.
Humidity
The average relative humidity in September is 75%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.4 days and typically collects 2.09" (53mm) of precipitation.Snowfall
May through October are months without snowfall.Daylight
In September, the average length of the day in Shirley is 12h and 23min.On the first day of the month, sunrise is at 6:41 am and sunset at 7:36 pm. On the last day of September, sunrise is at 7:04 am and sunset at 6:53 pm CDT.
Sunshine
The average sunshine in September is 9.3h.UV index
The average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The UV index of 5 during September translates into the following guidance:
Preventative actions are necessary - Recommendations to ward off sunburn are given. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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
Shirley, AR
- Average high temperature in September: 82°F
The warmest month (with the highest average high temperature) is July (90°F).
The month with the lowest average high temperature is January (45.3°F).
- Average low temperature in September: 61.9°F
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (30.4°F).
Average pressure in September
Shirley, 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
Shirley, AR
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Shirley, AR
- Average humidity in September: 75%
The months with the highest relative humidity are March and May (79%).
The month with the lowest relative humidity is October (73%).
Average rainfall in September
Shirley, AR
- Average rainfall in September: 2.09"
The wettest month (with the highest rainfall) is April (4.09").
The driest month (with the least rainfall) is September (2.09").
Average rainfall days in September
Shirley, AR
- Average rainfall days in September: 12.4 days
The months with the highest number of rainy days are May and July (15.8 days).
The month with the least rainy days is January (9.3 days).
Average snowfall in September
Shirley, AR
- Average snowfall in September: 0"
The month with the highest snowfall is March (1.34").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Shirley, AR
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Shirley, AR
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in September: 9h and 18min
The months with the most sunshine are June and July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in September
Shirley, AR
- Average sunshine days in September: 15.5 days
The month with the most sunshine days is December (20 days).
The month with the least sunshine days is July (13.2 days).
Average UV index in September
Shirley, AR
- Average UV index in September: 5
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Shirley, AR
- Average cloud cover in September: 29
The months with the most cloud cover are February and March (Cloud cover 45).
The months with the least cloud cover are June and July (Cloud cover 27).
Average visibility in September
Shirley, AR
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
