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 advent of September brings a slight shift in average high-temperature, moving from a tropical 90.1°F (32.3°C) in August to a warm 83.7°F (28.7°C). September brings with it a nighttime average temperature of 63°F (17.2°C).Heat index
Throughout September, the heat index is calculated to be a hot 91.4°F (33°C). Implement more preventive measures, heat cramps and heat exhaustion are probable. Heatstroke might result from extended activity.The metrics for the heat index are tailored for both shady environments and light winds. Heat index values can rise by 15 Fahrenheit (8 Celsius) degrees when in direct sunlight.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', embodies the combination of air temperature and moisture content to illustrate perceived heat. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. In the direct sunlight, the weather's impact can be amplified, possibly boosting the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are extremely significant for babies and toddlers. Young children are more at risk than adults since they tend to sweat less. Moreover, their large skin surface in proportion to their small bodies and the high heat production due to their activities contribute to their vulnerability.
Humidity
The months with the lowest humidity are July through October, with an average relative humidity of 73%.Rainfall
In September, the rain falls for 13.2 days. Throughout September, 2.72" (69mm) of precipitation is accumulated. In Old Bonnerdale, during the entire year, the rain falls for 160.2 days and collects up to 38.86" (987mm) of precipitation.Snowfall
In Old Bonnerdale, snow does not fall in April through October.Daylight
In Old Bonnerdale, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:47 am and sunset at 7:39 pm. On the last day of the month, sunrise is at 7:07 am and sunset at 6:58 pm CDT.
Sunshine
In Old Bonnerdale, the average sunshine in September is 9.2h.UV index
The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: An average UV index of 5 in September transforms into this advice:
Act with care - The need to guard against sun damage is communicated. Midday is the peak time for the Sun's radiation; stay in the shade and protect yourself. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Is it hot in Old Bonnerdale during September?
What is the least humid month in Old Bonnerdale?
What is the average humidity in September in Old Bonnerdale?
How many days does it rain in September in Old Bonnerdale?
When it does not snow in Old Bonnerdale?
What is the average length of the day in September in Old Bonnerdale?
What time are sunrise and sunset in September in Old Bonnerdale?
How long on average sun shines in September in Old Bonnerdale?
What is the UV index reading in September in Old Bonnerdale?
Average temperature in September
Old Bonnerdale, AR
- Average high temperature in September: 83.7°F
The warmest month (with the highest average high temperature) is July (91°F).
The month with the lowest average high temperature is January (48.7°F).
- Average low temperature in September: 63°F
The month with the highest average low temperature is July (70.2°F).
The coldest month (with the lowest average low temperature) is January (32.5°F).
Average pressure in September
Old Bonnerdale, 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
Old Bonnerdale, AR
- Average wind speed in September: 4.9mph
The windiest month (with the highest average wind speed) is April (7.8mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).
Average humidity in September
Old Bonnerdale, AR
- Average humidity in September: 73%
The month with the highest relative humidity is March (80%).
The months with the lowest relative humidity are July, August, September and October (73%).
Average rainfall in September
Old Bonnerdale, AR
- Average rainfall in September: 2.72"
The wettest month (with the highest rainfall) is May (4.76").
The driest month (with the least rainfall) is January (2.32").
Average rainfall days in September
Old Bonnerdale, AR
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is August (17.7 days).
The month with the least rainy days is January (9.6 days).
Average snowfall in September
Old Bonnerdale, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.46").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Old Bonnerdale, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (2 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
Old Bonnerdale, 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).
Average sunshine days in September
Old Bonnerdale, AR
- Average sunshine days in September: 14.2 days
The month with the most sunshine days is January (19 days).
The month with the least sunshine days is August (10.5 days).
Average UV index in September
Old Bonnerdale, AR
- Average UV index in September: 5
The month with the highest UV index is June (UV index 7).
The month with the lowest UV index is December (UV index 2).
Average cloud cover in September
Old Bonnerdale, AR
- Average cloud cover in September: 30
The month with the most cloud cover is February (Cloud cover 49).
The months with the least cloud cover are June, July, August and September (Cloud cover 30).
Average visibility in September
Old Bonnerdale, AR
- Average visibility in September: 6mi
The months with the highest visibility are April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March, May and December (5mi).
Old Bonnerdale, Arkansas, USA
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