September weather forecastGrandfather, NC
September
Weather in September
The first month of the autumn, September, is still a warm month in Grandfather, North Carolina, with an average temperature varying between 73.8°F (23.2°C) and 53.8°F (12.1°C).Temperature
As Grandfather steps into September, the average high-temperature holds at a still moderately hot 73.8°F (23.2°C), hinting at a minor fluctuation from the prior month. September's nights observe an average temperature of 53.8°F (12.1°C).Humidity
The months with the highest humidity are February, March, May, September and December, with an average relative humidity of 80%.Rainfall
In Grandfather, during September, the rain falls for 14.1 days and regularly aggregates up to 1.81" (46mm) of precipitation. In Grandfather, during the entire year, the rain falls for 178.4 days and collects up to 25.39" (645mm) of precipitation.Snowfall
June through September are months without snowfall.Daylight
The average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:59 am and sunset at 7:54 pm. On the last day of September, sunrise is at 7:22 am and sunset at 7:12 pm EDT.
Sunshine
In Grandfather, the average sunshine in September is 8.2h.UV index
In Grandfather, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 4 during September translates into the following recommendations:
Take necessary precautions - Defending against sun damage is advocated. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Grandfather, NC
- Average high temperature in September: 73.8°F
The warmest month (with the highest average high temperature) is July (80.1°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in September: 53.8°F
The month with the highest average low temperature is July (59.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).
Average pressure in September
Grandfather, NC
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.99"Hg).
Average wind speed in September
Grandfather, NC
- Average wind speed in September: 4mph
The windiest months (with the highest average wind speed) are January and February (7.1mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in September
Grandfather, NC
- Average humidity in September: 80%
The months with the highest relative humidity are February, March, May, September and December (80%).
The months with the lowest relative humidity are June and November (77%).
Average rainfall in September
Grandfather, NC
- Average rainfall in September: 1.81"
The wettest month (with the highest rainfall) is July (3.07").
The driest month (with the least rainfall) is November (1.5").
Average rainfall days in September
Grandfather, NC
- Average rainfall days in September: 14.1 days
The month with the highest number of rainy days is July (20.2 days).
The month with the least rainy days is November (10.6 days).
Average snowfall in September
Grandfather, NC
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.65").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Grandfather, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (12.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Grandfather, NC
- Average daylight in September: 12h and 24min
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: 8h and 12min
The months with the most sunshine are June and July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 5h and 12min).
Average sunshine days in September
Grandfather, NC
- Average sunshine days in September: 12.9 days
The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is July (9 days).
Average UV index in September
Grandfather, NC
- Average UV index in September: 4
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Grandfather, NC
- Average cloud cover in September: 41
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 35).
Average visibility in September
Grandfather, NC
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (5mi).
