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
In September, the average high-temperature is almost the same as in August - a moderately hot 84.4°F (29.1°C). In West Helena, in September, the average low-temperature is 66.2°F (19°C).Heat index
In September, the average heat index is appraised at a hot 91.4°F (33°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. With exposure to direct sunlight, the heat index may be increased by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'apparent temperature', 'felt air temperature', 'real feel', or 'feels like', is calculated by taking the relative humidity value for a specific location and factoring it into the air temperature reading. Additional factors like metabolic differences, differences in body mass, height, and shape, pregnancy, and activity influence one's weather impression. 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 crucial for babies and toddlers. Young children are generally more endangered than adults, as they usually less sweat. And also, due to larger skin surface relative to their small bodies and higher heat production as a result of their activity.
Humidity
In September, the average relative humidity in West Helena is 72%.Rainfall
The month with the least rainfall is September, when the rain falls for 9.6 days and typically collects 0.67" (17mm) of precipitation.Snowfall
In West Helena, snow does not fall in March through November.Daylight
The average length of the day in September in West Helena is 12h and 23min.On the first day of September, sunrise is at 6:35 am and sunset at 7:29 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:48 pm CDT.
Sunshine
In September, the average sunshine in West Helena is 9.7h.UV index
In September, the average daily maximum UV index in West Helena is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The average daily UV index of 5 in September transform into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
FAQ
What is the temperature in September in West Helena?
What is the average humidity in September in West Helena?
What is the driest month in West Helena?
How many days does it rain in September in West Helena?
When it does not snow in West Helena?
How many hours of daylight does West Helena have in September?
What time are sunrise and sunset in September in West Helena?
How many hours of sunshine does West Helena have in September?
How high is the UV index in September in West Helena?
Average temperature in September
West Helena, AR
- Average high temperature in September: 84.4°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 (48°F).
- Average low temperature in September: 66.2°F
The month with the highest average low temperature is July (73°F).
The coldest month (with the lowest average low temperature) is January (35.4°F).
Average pressure in September
West Helena, 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
West Helena, AR
- Average wind speed in September: 5.8mph
The windiest month (with the highest average wind speed) is February (9.6mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).
Average humidity in September
West Helena, AR
- Average humidity in September: 72%
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
West Helena, AR
- Average rainfall in September: 0.67"
The wettest month (with the highest rainfall) is April (1.89").
The driest month (with the least rainfall) is September (0.67").
Average rainfall days in September
West Helena, AR
- Average rainfall days in September: 9.6 days
The month with the highest number of rainy days is July (15 days).
The month with the least rainy days is November (6.7 days).
Average snowfall in September
West Helena, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.28").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
West Helena, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (1.3 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
West Helena, 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 4min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).
Average sunshine days in September
West Helena, AR
- Average sunshine days in September: 17.3 days
The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is July (13.3 days).
Average UV index in September
West Helena, AR
- Average UV index in September: 5
The month with the highest UV index is June (UV index 7).
The months with the lowest UV index are January, February and December (UV index 3).
Average cloud cover in September
West Helena, AR
- Average cloud cover in September: 28
The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 25).
Average visibility in September
West Helena, 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).
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