September weather forecastMarianna, AR
September
Weather in September
September, the first month of the autumn in Marianna, is also a moderately hot month, with temperature in the range of an average low of 65.7°F (18.7°C) and an average high of 83.5°F (28.6°C).Temperature
The shift to September signals an average high-temperature of a warm 83.5°F (28.6°C), subtly varied from August's 88°F (31.1°C). Marianna in September anticipates an average nighttime temperature of 65.7°F (18.7°C).Heat index
September's heat index is computed to be a tropical 91.4°F (33°C). Take more caution, heat exhaustion and heat cramps may occur. Long-lasting activity may cause heatstroke.Records show heat index calculations are tailored for shaded regions and mild winds. The direct sun can potentially cause the heat index to increase by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'feels like', is a calculation that merges air temperature and relative humidity to depict the sensation of warmth. Elements of metabolic variation, physical activity, and clothing contribute to the effect of temperature on an individual. Remember, direct sunlight exposure can heighten the heat impact and might increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values remain especially vital for babies and toddlers. Juveniles often do not understand the need to recuperate and rehydrate. Thirst is a delayed symptom of dehydration - hence, it is vital to maintain hydration, particularly during ongoing physical activities.
Humidity
In Marianna, the average relative humidity in September is 74%.Rainfall
In Marianna, Arkansas, in September, during 12.9 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. Throughout the year, there are 164.8 rainfall days, and 41.73" (1060mm) of precipitation is accumulated.Snowfall
April through September are months without snowfall in Marianna.Daylight
In Marianna, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:36 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:48 pm CDT.
Sunshine
In September, the average sunshine in Marianna is 9.6h.UV index
In September, the average daily maximum UV index in Marianna, Arkansas, is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: An average maximum UV index of 5 in September leads to these recommendations:
Exercise prevention - Warding off sunburn is urged. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. Enhance your sun protection with tightly woven, yet airy clothing.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Marianna, AR
- Average high temperature in September: 83.5°F
The warmest month (with the highest average high temperature) is July (89.2°F).
The month with the lowest average high temperature is January (47.8°F).
- Average low temperature in September: 65.7°F
The month with the highest average low temperature is July (72.9°F).
The coldest month (with the lowest average low temperature) is January (34.9°F).
Average pressure in September
Marianna, 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
Marianna, AR
- Average wind speed in September: 6mph
The windiest month (with the highest average wind speed) is February (9.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in September
Marianna, AR
- Average humidity in September: 74%
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
Marianna, AR
- Average rainfall in September: 2.6"
The wettest month (with the highest rainfall) is April (4.76").
The driest month (with the least rainfall) is January (2.4").
Average rainfall days in September
Marianna, AR
- Average rainfall days in September: 12.9 days
The month with the highest number of rainy days is July (18.2 days).
The month with the least rainy days is November (9.5 days).
Average snowfall in September
Marianna, 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 and September (0").
Average snowfall days in September
Marianna, 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 and September (0 days).
Average daylight in September /
Average sunshine in September
Marianna, 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 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: 4h and 48min).
Average sunshine days in September
Marianna, AR
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is November (19.7 days).
The month with the least sunshine days is July (9.6 days).
Average UV index in September
Marianna, 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, November and December (UV index 3).
Average cloud cover in September
Marianna, AR
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 46).
The month with the least cloud cover is June (Cloud cover 25).
Average visibility in September
Marianna, 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).
