September weather forecastSaint Francis, AR
September
Weather in September
September, the first month of the autumn in Saint Francis, is also a moderately hot month, with an average temperature fluctuating between 82°F (27.8°C) and 63.3°F (17.4°C).Temperature
Saint Francis records an average high-temperature of a moderately hot 82°F (27.8°C) in September, closely mirroring the climate of the previous month. During September, the temperature tends to dip to an average of 63.3°F (17.4°C) at night.Heat index
In September, the heat index is computed to be a tropical 87.8°F (31°C). If one continues to be active during exposure, it might cause tiredness and subsequent heat cramps.Note that heat index values are valued for light wind and location in the shade. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is a measure of how hot it feels when the actual air humidity is factored in. The influence of weather is personal, with varied individuals experiencing it differently due to differences in body mass, stature, and physical exertion levels. One must note that being under the direct sun can escalate the heat's effects, with the heat index possibly rising by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Young individuals usually face more risks than adults due to their lower sweat production. Their large skin surface area relative to their tiny bodies and high heat production from their activities adds to their risk.
Humidity
The average relative humidity in September in Saint Francis is 72%.Rainfall
September is the month with the least rainfall in Saint Francis. Rain falls for 12.5 days and accumulates 1.89" (48mm) of precipitation.Snowfall
April through September are months without snowfall in Saint Francis.Daylight
In September, the average length of the day is 12h and 24min.On the first day of September in Saint Francis, sunrise is at 6:32 am and sunset at 7:28 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:45 pm CDT.
Sunshine
In September, the average sunshine is 9.7h.UV index
In Saint Francis, 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: In September, the UV index of 5 transforms into the following advice:
Adopt protective measures - It is advised to guard against sun damage. The Sun's radiation is especially intense around midday; try to stay in shade during this period. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Saint Francis, AR
- Average high temperature in September: 82°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (43.3°F).
- Average low temperature in September: 63.3°F
The month with the highest average low temperature is July (71.8°F).
The coldest month (with the lowest average low temperature) is January (31.1°F).
Average pressure in September
Saint Francis, 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 (29.93"Hg).
Average wind speed in September
Saint Francis, AR
- Average wind speed in September: 6.3mph
The windiest month (with the highest average wind speed) is February (9.7mph).
The calmest month (with the lowest average wind speed) is August (5.8mph).
Average humidity in September
Saint Francis, 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
Saint Francis, AR
- Average rainfall in September: 1.89"
The wettest month (with the highest rainfall) is April (4.57").
The driest month (with the least rainfall) is September (1.89").
Average rainfall days in September
Saint Francis, AR
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is May (16.7 days).
The month with the least rainy days is January (9.5 days).
Average snowfall in September
Saint Francis, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.38").
The months with the least snowfall are April, May, June, July, August and September (0").
Average snowfall days in September
Saint Francis, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2.5 days).
The months with the least snowfall days are April, May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Saint Francis, AR
- 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 42min
The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in September
Saint Francis, AR
- Average sunshine days in September: 14.5 days
The month with the most sunshine days is January (18.7 days).
The month with the least sunshine days is July (12.3 days).
Average UV index in September
Saint Francis, AR
- Average UV index in September: 5
The month with the highest UV index is July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Saint Francis, AR
- Average cloud cover in September: 27
The months with the most cloud cover are February and March (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 24).
Average visibility in September
Saint Francis, 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).
