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
September's onset introduces a mild reduction in the average high-temperature, from a tropical 91.6°F (33.1°C) in August to a moderately hot 84.4°F (29.1°C). The average temperature drops to a comfortable 63°F (17.2°C) during the night in the month of September.Heat index
During September, the heat index is appraised at a hot 91.4°F (33°C). Implement enhanced safety actions, heat cramps and heat exhaustion could occur. Sustained activity might result in heatstroke.It is noted that heat index values are ascertained for locations in the shade and with gentle breezes. The heat index might be elevated by 15 Fahrenheit (8 Celsius) degrees due to direct sun exposure.
Note: The heat index, also known as 'apparent temperature' or 'felt air temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. The impact of weather is personal, differing among a variety of people based on differences in body mass, height, and the level of physical exertion. Realize that direct exposure to sunlight can augment the felt heat, leading to a potential increase in the heat index by 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly critical to babies and toddlers. Young individuals are generally in more danger than adults due to their lower capacity to sweat. Moreover, their large skin surface in relation to their small bodies and the increased heat generation from their activities makes them more vulnerable.
Humidity
The average relative humidity in September is 72%.Rainfall
In White Rock, during September, the rain falls for 9.5 days and regularly aggregates up to 2.6" (66mm) of precipitation. In White Rock, during the entire year, the rain falls for 134.2 days and collects up to 33.86" (860mm) of precipitation.Snowfall
In White Rock, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 23min.On the first day of the month, sunrise is at 6:48 am and sunset at 7:42 pm. On the last day of September, in White Rock, Arkansas, sunrise is at 7:10 am and sunset at 7:00 pm CDT.
Sunshine
In September, the average sunshine is 9.3h.UV index
In White Rock, the average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 5 in September translates into this advice:
Exercise care. People with light skin might get burns in fewer than 30 minutes. It's recommended to limit sun exposure when its radiation is at its peak during midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days.
Frequently asked questions
Is it hot in White Rock during September?
What is the average humidity in September in White Rock?
How many days does it rain in September in White Rock?
When it does not snow in White Rock?
How many hours of daylight does White Rock have in September?
When is the sunrise / sunset in September in White Rock?
How many hours of sunshine does White Rock have in September?
What is the UV index reading in September in White Rock?
Average temperature in September
White Rock, AR
- Average high temperature in September: 84.4°F
The warmest month (with the highest average high temperature) is July (93°F).
The month with the lowest average high temperature is January (47.5°F).
- Average low temperature in September: 63°F
The month with the highest average low temperature is July (70°F).
The coldest month (with the lowest average low temperature) is January (31.1°F).
Average pressure in September
White Rock, 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
White Rock, AR
- Average wind speed in September: 5mph
The windiest month (with the highest average wind speed) is April (7mph).
The calmest month (with the lowest average wind speed) is July (4.5mph).
Average humidity in September
White Rock, AR
- Average humidity in September: 72%
The month with the highest relative humidity is May (78%).
The months with the lowest relative humidity are July and August (70%).
Average rainfall in September
White Rock, AR
- Average rainfall in September: 2.6"
The wettest month (with the highest rainfall) is May (4.45").
The driest month (with the least rainfall) is January (2.05").
Average rainfall days in September
White Rock, AR
- Average rainfall days in September: 9.5 days
The month with the highest number of rainy days is March (14.8 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in September
White Rock, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.59").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
White Rock, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (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
White Rock, AR
- Average daylight in September: 12h and 2min
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 2min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in September
White Rock, AR
- Average sunshine days in September: 18.5 days
The month with the most sunshine days is December (20.4 days).
The months with the least sunshine days are April and May (14.3 days).
Average UV index in September
White Rock, 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
White Rock, AR
- Average cloud cover in September: 29
The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is August (Cloud cover 25).
Average visibility in September
White Rock, AR
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
White Rock, Arkansas, USA
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