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 beginning of September brings a minor change in the average high-temperature, shifting from a tropical 87.3°F (30.7°C) in August to a moderately hot 81.9°F (27.7°C). Throughout September, the temperature in Williamston tends to fall to a consistent average low of 64.9°F (18.3°C).Heat index
In September, the average heat index is appraised at a tropical 87.8°F (31°C). Long-lasting exposure and activity potentially induce a sense of weariness, with the risk of heat cramps.It is worth noting that heat index values are gauged for conditions in the shade and light breezes. If exposed to direct sunlight, the heat index could climb by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'felt air temperature', is an amalgamation of air temperature and humidity to express the equivalent perceived temperature. Elements such as metabolic variations, being pregnant, and physical activity can impact one's weather perception. 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 quite important for babies and toddlers. Young ones often disregard the necessity to rest and hydrate. Thirst usually indicates advanced dehydration - hence, it is key to stay hydrated, particularly during ongoing physical activities.
Humidity
The months with the highest humidity in Williamston, North Carolina, are May, August, September and December, with an average relative humidity of 79%.Rainfall
In Williamston, during September, the rain falls for 11.9 days and regularly aggregates up to 1.5" (38mm) of precipitation. In Williamston, during the entire year, the rain falls for 141.7 days and collects up to 16.65" (423mm) of precipitation.Snowfall
In Williamston, snow does not fall in April through November.Daylight
The average length of the day in September in Williamston, North Carolina, is 12h and 23min.On the first day of the month, sunrise is at 6:40 am and sunset at 7:35 pm. On the last day of September, in Williamston, sunrise is at 7:02 am and sunset at 6:52 pm EDT.
Sunshine
The average sunshine in September in Williamston is 9.1h.UV index
In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In September, an average UV index of 5 transforms into the following instructions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. During midday, the Sun's radiation is strongest, and it's advisable to reduce direct exposure. Boost your sun resistance with garments that are densely woven yet spacious.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Williamston in September?
What are the most humid months in Williamston?
What is the average humidity in September in Williamston?
How many days does it rain in September in Williamston?
When it does not snow in Williamston?
What is the average length of the day in September in Williamston?
When are sunrise and sunset in September in Williamston?
How long on average sun shines in September in Williamston?
What is the UV index reading in September in Williamston?
Average temperature in September
Williamston, NC
- Average high temperature in September: 81.9°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (48.7°F).
- Average low temperature in September: 64.9°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (33.1°F).
Average pressure in September
Williamston, NC
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Williamston, NC
- Average wind speed in September: 6.2mph
The windiest month (with the highest average wind speed) is April (8.2mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).
Average humidity in September
Williamston, NC
- Average humidity in September: 79%
The months with the highest relative humidity are May, August, September and December (79%).
The month with the lowest relative humidity is January (75%).
Average rainfall in September
Williamston, NC
- Average rainfall in September: 1.5"
The wettest month (with the highest rainfall) is July (2.17").
The driest months (with the least rainfall) are January and March (0.87").
Average rainfall days in September
Williamston, NC
- Average rainfall days in September: 11.9 days
The month with the highest number of rainy days is July (18.1 days).
The month with the least rainy days is October (7.2 days).
Average snowfall in September
Williamston, NC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.63").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Williamston, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (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
Williamston, NC
- 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 48min).
- Average sunshine in September: 9h and 1min
The month with the most sunshine is June (Average sunshine: 10h and 30min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days in September
Williamston, NC
- Average sunshine days in September: 15.9 days
The month with the most sunshine days is October (22.2 days).
The month with the least sunshine days is July (9.5 days).
Average UV index in September
Williamston, NC
- 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 January (UV index 2).
Average cloud cover in September
Williamston, NC
- Average cloud cover in September: 39
The month with the most cloud cover is March (Cloud cover 44).
The month with the least cloud cover is June (Cloud cover 33).
Average visibility in September
Williamston, NC
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are August and September (5mi).
Williamston, North Carolina, USA
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