September weather forecastBismarck, AR
September
Weather in September
September, the first month of the autumn in Bismarck, is also a moderately hot month, with an average temperature varying between 84.9°F (29.4°C) and 63.7°F (17.6°C).Temperature
The arrival of September suggests a slight decrease in the average high-temperature, moving from a hot 91°F (32.8°C) in August to a warm 84.9°F (29.4°C). Bismarck, in September, experiences an average temperature of 63.7°F (17.6°C) at night.Heat index
September's heat index is appraised at a hot 93.2°F (34°C). Heightened safety actions are necessary, heat cramps and heat exhaustion are probable. Persistent activity may lead to heatstroke.From a standpoint of the heat index, values pertain to shaded conditions and mild breezes. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'feels like' or 'apparent temperature', provides an understanding of perceived warmth by combining temperature and relative humidity. One's weather perception can be influenced by a range of factors including metabolic differences, being pregnant, and their level of physical activity. Bear in mind that direct sunshine exposure increases weather impact, and may raise heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are especially vital to children. Children commonly overlook the importance of rest and fluid replenishment. Thirst, being a delayed sign of dehydration, emphasizes the need to keep hydration up, especially during lengthy physical activities.
Humidity
The average relative humidity in September is 73%.Rainfall
The month with the least rainfall is September, when the rain falls for 11.5 days and typically collects 1.93" (49mm) of precipitation.Snowfall
April through October are months without snowfall in Bismarck, Arkansas.Daylight
In September, the average length of the day is 12h and 23min.On the first day of September, sunrise is at 6:46 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:57 pm CDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
In Bismarck, Arkansas, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.Note: A maximum UV index of 5 in September translates into the following recommendations:
Heed the precautions - Suggestions to avoid sunburn are made. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Select sunglasses that boast both UVA and UVB protection to limit the adverse effects of the sun on the eyes.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Bismarck, AR
- Average high temperature in September: 84.9°F
The warmest month (with the highest average high temperature) is July (91.9°F).
The month with the lowest average high temperature is January (49.3°F).
- Average low temperature in September: 63.7°F
The month with the highest average low temperature is July (70.7°F).
The coldest month (with the lowest average low temperature) is January (33.4°F).
Average pressure in September
Bismarck, 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
Bismarck, AR
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Bismarck, AR
- Average humidity in September: 73%
The month with the highest relative humidity is March (80%).
The month with the lowest relative humidity is October (72%).
Average rainfall in September
Bismarck, AR
- Average rainfall in September: 1.93"
The wettest month (with the highest rainfall) is April (3.9").
The driest month (with the least rainfall) is September (1.93").
Average rainfall days in September
Bismarck, AR
- Average rainfall days in September: 11.5 days
The month with the highest number of rainy days is August (15.9 days).
The month with the least rainy days is January (9.2 days).
Average snowfall in September
Bismarck, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.94").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Bismarck, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.7 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
Bismarck, 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 18min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 6min).
Average sunshine days in September
Bismarck, AR
- Average sunshine days in September: 16.8 days
The months with the most sunshine days are January and October (19.4 days).
The month with the least sunshine days is August (13.5 days).
Average UV index in September
Bismarck, AR
- Average UV index in September: 5
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Bismarck, AR
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are June, July, August and September (Cloud cover 30).
Average visibility in September
Bismarck, AR
- Average visibility in September: 6mi
The months with the highest visibility are April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March, May and December (5mi).
