September weather forecastDeer, AR
September
Weather in September
As summer morphs into autumn, September in Deer, Arkansas, witnesses lowering temperatures. This change is accompanied by gentle winds and slightly lower humidity. The number of daylight hours and the amount of sunshine begin to decrease. October continues with the autumn story, carrying forward the cooling trend and the colorful spectacle.Temperature
A minor decrease in the average high-temperature is observed during September, shifting from a tropical 90.7°F (32.6°C) in August to a warm 83.7°F (28.7°C). Deer's nighttime average of 61.7°F (16.5°C) during September reflects a substantial decrease from the daytime temperature.Heat index
The heat index value during September is evaluated at a hot 91.4°F (33°C). Ensure extra safety measures, heat exhaustion and heat cramps are likely. Continuous activity might result in heatstroke.Heat index values are typically calculated for conditions of shade and a light breeze. The heat index may scale up by 15 Fahrenheit (8 Celsius) degrees with direct sun exposure.
Note: The heat index, also known as 'feels like' or 'felt air temperature', comes about by integrating the temperature readings with the humidity levels. The individual's experience of temperature can be shaped by numerous aspects such as metabolic variations, physical exertion, and attire. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values are particularly relevant to children. Young people are generally more susceptible than adults because they perspire less. Furthermore, their proportionally larger skin surface to their petite bodies and the increased heat output from their actions add to the risk.
Humidity
In September, the average relative humidity is 73%.Rainfall
The months with the least rainfall are July and September Rain falls for 11.7 days and accumulates 2.36" (60mm) of rain.Snowfall
April through October are months without snowfall.Daylight
In Deer, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:45 am and sunset at 7:39 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 Deer, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the ordinary person.Note: The daily high UV index of 5 during September translates into the following recommendations:
Guard yourself - Precautionary measures against sun damage are advocated. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. 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
Deer, AR
- Average high temperature in September: 83.7°F
The warmest month (with the highest average high temperature) is July (91.4°F).
The month with the lowest average high temperature is January (46.9°F).
- Average low temperature in September: 61.7°F
The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in September
Deer, AR
- Average pressure in September: 30.02"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
Deer, AR
- Average wind speed in September: 4.4mph
The windiest month (with the highest average wind speed) is April (6.2mph).
The calmest months (with the lowest average wind speed) are July and August (4.2mph).
Average humidity in September
Deer, AR
- Average humidity in September: 73%
The months with the highest relative humidity are March and May (79%).
The months with the lowest relative humidity are July and August (72%).
Average rainfall in September
Deer, AR
- Average rainfall in September: 2.36"
The wettest months (with the highest rainfall) are April and May (4.41").
The driest months (with the least rainfall) are July and September (2.36").
Average rainfall days in September
Deer, AR
- Average rainfall days in September: 11.7 days
The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is November (9 days).
Average snowfall in September
Deer, AR
- Average snowfall in September: 0"
The months with the highest snowfall are January and February (0.79").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Deer, AR
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (1.5 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
Deer, 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 month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 5h and 24min).
Average sunshine days in September
Deer, AR
- Average sunshine days in September: 16.1 days
The month with the most sunshine days is January (20.3 days).
The month with the least sunshine days is May (13.2 days).
Average UV index in September
Deer, 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 and December (UV index 2).
Average cloud cover in September
Deer, AR
- Average cloud cover in September: 30
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is August (Cloud cover 28).
Average visibility in September
Deer, AR
- Average visibility in September: 6mi
The months with the highest visibility are June, July, August, September and October (6mi).
The months with the lowest visibility are January, February, March, April, May, November and December (5mi).
