September weather forecastWilliston, NC
September
Weather in September
September, the first month of the autumn in Williston, is also a moderately hot month, with an average temperature fluctuating between 79.7°F (26.5°C) and 74.3°F (23.5°C).Temperature
Stepping into September, Williston records an average high-temperature of a still warm 79.7°F (26.5°C), almost consistent with August. Night temperatures during September stabilize at an average of 74.3°F (23.5°C), closely mirroring the daytime temperatures.Humidity
In September, the average relative humidity is 77%.Rainfall
In Williston, during September, the rain falls for 17.5 days and regularly aggregates up to 4.49" (114mm) of precipitation. In Williston, during the entire year, the rain falls for 181.4 days and collects up to 34.76" (883mm) of precipitation.Snowfall
March through December are months without snowfall.Daylight
In Williston, North Carolina, the average length of the day in September is 12h and 23min.On the first day of the month, sunrise is at 6:39 am and sunset at 7:32 pm. On the last day of September, in Williston, sunrise is at 7:00 am and sunset at 6:51 pm EDT.
Sunshine
In Williston, North Carolina, the average sunshine in September is 9.6h.UV index
The average daily maximum UV index in September is 6. A UV Index reading of 6 to 7 represents a high threat to health from unsafe exposure to UV radiation for average individuals.Note: In September, a daily UV index of 6 turns into the following recommendations:
Dodge overexposure. Fair-skinned people can get singed in less than 20 minutes. Remember that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. Make an effort to avoid direct sun exposure during these hours. Always opt for UVA and UVB-resistant sunglasses on radiant days.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Williston, NC
- Average high temperature in September: 79.7°F
The warmest month (with the highest average high temperature) is July (83.3°F).
The month with the lowest average high temperature is January (54.1°F).
- Average low temperature in September: 74.3°F
The month with the highest average low temperature is July (78.3°F).
The coldest month (with the lowest average low temperature) is January (44.6°F).
Average pressure in September
Williston, NC
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is December (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed in September
Williston, NC
- Average wind speed in September: 11.6mph
The windiest months (with the highest average wind speed) are February and March (14mph).
The calmest month (with the lowest average wind speed) is August (10.4mph).
Average humidity in September
Williston, NC
- Average humidity in September: 77%
The months with the highest relative humidity are May, June, July and August (78%).
The months with the lowest relative humidity are February, March and October (74%).
Average rainfall in September
Williston, NC
- Average rainfall in September: 4.49"
The wettest month (with the highest rainfall) is August (4.84").
The driest month (with the least rainfall) is January (1.3").
Average rainfall days in September
Williston, NC
- Average rainfall days in September: 17.5 days
The month with the highest number of rainy days is August (22.3 days).
The months with the least rainy days are February and November (11.1 days).
Average snowfall in September
Williston, NC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.24").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Williston, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (0.6 days).
The months with the least snowfall days are March, April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Williston, NC
- Average daylight in September: 12h and 24min
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 54min).
- Average sunshine in September: 9h and 36min
The month with the most sunshine is June (Average sunshine: 10h and 54min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Williston, NC
- Average sunshine days in September: 9.7 days
The month with the most sunshine days is January (16.8 days).
The month with the least sunshine days is August (5.9 days).
Average UV index in September
Williston, NC
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Williston, NC
- Average cloud cover in September: 32
The month with the most cloud cover is December (Cloud cover 41).
The month with the least cloud cover is June (Cloud cover 27).
Average visibility in September
Williston, NC
- 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).
