Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The onset of September aligns with a soft reduction in the average high-temperature, gently falling from a tropical 91.4°F (33°C) in August to a moderately hot 85.5°F (29.7°C). The average nighttime temperature lowers to an enjoyable 64.8°F (18.2°C) throughout September.Heat index
In September, the heat index is estimated at a fiery hot 95°F (35°C). Take special precautions - heat exhaustion and heat cramps are expected. Heatstroke may occur with lengthy activity.Take into consideration that the heat index values are calculated for shade and light wind conditions. Heat index values might soar by up to 15 Fahrenheit (8 Celsius) degrees with exposure to direct sunshine.
Note: The heat index, also known as 'real feel' or 'apparent temperature', is the result of factoring in humidity to the air temperature, indicating perceived warmth. Metabolic differences, pregnancy status, and the level of physical activity are additional factors influencing an individual's weather perception. Direct sunlight exposure should be noted as it has the potential to increase the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Younglings are generally more in peril than adults due to their reduced perspiration. Coupled with a larger skin surface relative to their tiny bodies and greater heat production because of their activity, they become more at risk.
The process of perspiration is vital for the human body to get rid of excess warmth by allowing sweat to evaporate. During conditions of high air temperature and humidity (high heat index), the body's ability to perspire is inhibited, increasing the sensation of warmth. Overheating and dehydration threats arise when heat gain goes beyond what the body can comfortably shed.
Humidity
July, September and October, with an average relative humidity of 72%, are the least humid months in Donaldson.Rainfall
The month with the least rainfall is September, when the rain falls for 13.4 days and typically collects 2.24" (57mm) of precipitation.Snowfall
In Donaldson, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 22min.On the first day of September in Donaldson, Arkansas, sunrise is at 6:45 am and sunset at 7:37 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 6:56 pm CDT.
Sunshine
In September, the average sunshine is 9.5h.UV index
In Donaldson, the average daily maximum UV index in September is 6. A UV Index of 6 to 7 symbolizes a high health risk from unprotected exposure to Sun's UV rays for the average person.Note: The maximum daily UV index of 6 during September translates into the following directions:
Elude overexposure. Fair-skinned people could get burnt in less than 20 minutes. Between 10 a.m. and 4 p.m., UV radiation is strongest. Make an effort to avoid direct sunlight during this time, remembering that shade structures may not provide full sun protection. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Frequently asked questions
How hot does it get in Donaldson in September?
What are the least humid months in Donaldson?
What is the average humidity in September in Donaldson?
What is the driest month in Donaldson?
How many days does it rain in September in Donaldson?
When it does not snow in Donaldson?
What is the average length of the day in September in Donaldson?
When is the sunrise / sunset in September in Donaldson?
How long on average sun shines in September in Donaldson?
What is the UV index reading in September in Donaldson?
Average temperature in September
Donaldson, AR
- Average high temperature in September: 85.5°F
The warmest month (with the highest average high temperature) is July (92.1°F).
The month with the lowest average high temperature is January (49.6°F).
- Average low temperature in September: 64.8°F
The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (33.6°F).
Average pressure in September
Donaldson, 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
Donaldson, AR
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is April (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Donaldson, AR
- Average humidity in September: 72%
The month with the highest relative humidity is March (80%).
The months with the lowest relative humidity are July, September and October (72%).
Average rainfall in September
Donaldson, AR
- Average rainfall in September: 2.24"
The wettest month (with the highest rainfall) is April (4.53").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in September
Donaldson, AR
- Average rainfall days in September: 13.4 days
The month with the highest number of rainy days is August (18.3 days).
The month with the least rainy days is November (10.2 days).
Average snowfall in September
Donaldson, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.91").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Donaldson, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.8 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
Donaldson, AR
- Average daylight in September: 12h and 2min
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 3min
The months with the most sunshine are June, July and August (Average sunshine: 10h and 24min).
The months with the least sunshine are January and February (Average sunshine: 5h and 12min).
Average sunshine days in September
Donaldson, AR
- Average sunshine days in September: 13.9 days
The month with the most sunshine days is January (18.6 days).
The month with the least sunshine days is August (10 days).
Average UV index in September
Donaldson, AR
- Average UV index in September: 6
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
Donaldson, AR
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 48).
The months with the least cloud cover are June and September (Cloud cover 28).
Average visibility in September
Donaldson, AR
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are May and December (5mi).
Donaldson, Arkansas, USA
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