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
A moderate decline in average high-temperatures is noted in September, moving from a hot 89.8°F (32.1°C) in August to a moderately hot 82.4°F (28°C). In September, the nighttime temperature plummets remarkably from the daily apex to a steady average of 60.4°F (15.8°C).Heat index
In September, the heat index is appraised at a tropical 87.8°F (31°C). If exposure and activity persist, fatigue could ensue, possibly leading to heat cramps.Understand that the heat index values take into account shaded locations and mild winds. 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 'feels like', evaluates the perceived heat by adding the effect of moisture in the air. Physical activity, clothing, and metabolic variations are additional factors that impact an individual's perception of temperature. Direct sun rays have a notable impact on perceived temperature, which can raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are highly important for children. Typically, young kids are at a higher risk than adults since they sweat less. Also, the larger skin surface in proportion to their small bodies and the heightened heat production due to their active nature adds to their vulnerability.
Humidity
In Norfork, the average relative humidity in September is 74%.Rainfall
The month with the least rainfall is September, when the rain falls for 12.5 days and typically collects 2.01" (51mm) of precipitation.Snowfall
In Norfork, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 24min.On the first day of the month, sunrise is at 6:41 am and sunset at 7:36 pm. On the last day of September, sunrise is at 7:04 am and sunset at 6:53 pm CDT.
Sunshine
In September, the average sunshine is 9.2h.UV index
In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for ordinary individuals.Note: A daily maximum UV index of 5 in September translates into the following instructions:
Take precautions - Protection against skin and eye damage is obliged. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. For holistic sun protection encompassing the eyes, ears, face, and neck, a wide-brim hat is key.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot does it get in September?
What is the average humidity in September?
What is the driest month?
How many days does it rain in September?
When it does not snow?
What is the average length of the day in September in Norfork?
When are sunrise and sunset in September?
How long on average sun shines in September?
What is the UV index intensity in September?
Average temperature in September
Norfork, AR
- Average high temperature in September: 82.4°F
The warmest month (with the highest average high temperature) is July (90.5°F).
The month with the lowest average high temperature is January (44.2°F).
- Average low temperature in September: 60.4°F
The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (28.2°F).
Average pressure in September
Norfork, 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 (29.93"Hg).
Average wind speed in September
Norfork, AR
- Average wind speed in September: 4.7mph
The windiest months (with the highest average wind speed) are February, March and April (7mph).
The calmest months (with the lowest average wind speed) are July and August (4.5mph).
Average humidity in September
Norfork, AR
- Average humidity in September: 74%
The month with the highest relative humidity is March (79%).
The months with the lowest relative humidity are August and October (73%).
Average rainfall in September
Norfork, AR
- Average rainfall in September: 2.01"
The wettest month (with the highest rainfall) is May (4.25").
The driest month (with the least rainfall) is September (2.01").
Average rainfall days in September
Norfork, AR
- Average rainfall days in September: 12.5 days
The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (8.4 days).
Average snowfall in September
Norfork, AR
- Average snowfall in September: 0"
The month with the highest snowfall is February (1.93").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Norfork, AR
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Norfork, AR
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in September
Norfork, AR
- Average sunshine days in September: 15.1 days
The month with the most sunshine days is January (19.5 days).
The month with the least sunshine days is July (11.9 days).
Average UV index in September
Norfork, AR
- Average UV index in September: 5
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).
Average cloud cover in September
Norfork, AR
- Average cloud cover in September: 32
The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is June (Cloud cover 28).
Average visibility in September
Norfork, AR
- Average visibility in September: 5mi
The months with the highest visibility are January, February, June, October, November and December (6mi).
The months with the lowest visibility are March, April, May, July, August and September (5mi).
Norfork, Arkansas, USA
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