September weather forecastMount Airy, NC
September
Weather in September
The first month of the autumn, September, is still a warm month in Mount Airy, North Carolina, with an average temperature varying between 79.2°F (26.2°C) and 58.6°F (14.8°C).Temperature
September heralds a minor drop in average high-temperature, sliding from August's warm 85.3°F (29.6°C) to a still moderately hot 79.2°F (26.2°C). September brings Mount Airy a consistent average low-temperature of 58.6°F (14.8°C).Humidity
The average relative humidity in September is 75%.Rainfall
September is the month with the least rainfall. Rain falls for 13.2 days and accumulates 1.69" (43mm) of precipitation.Snowfall
In Mount Airy, snow does not fall in May through October.Daylight
In Mount Airy, the average length of the day in September is 12h and 24min.On the first day of the month, sunrise is at 6:54 am and sunset at 7:50 pm. On the last day of September, sunrise is at 7:17 am and sunset at 7:06 pm EDT.
Sunshine
In Mount Airy, the average sunshine in September is 8.6h.UV index
The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the average person.Note: The maximum UV index of 5 during September leads to these instructions:
Prioritize safety - Recommendations to avert sunburn are shared. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Mount Airy, NC
- Average high temperature in September: 79.2°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is January (43.5°F).
- Average low temperature in September: 58.6°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).
Average pressure in September
Mount Airy, 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 (29.98"Hg).
Average wind speed in September
Mount Airy, NC
- Average wind speed in September: 4.8mph
The windiest month (with the highest average wind speed) is April (7.2mph).
The calmest month (with the lowest average wind speed) is August (4.3mph).
Average humidity in September
Mount Airy, NC
- Average humidity in September: 75%
The month with the highest relative humidity is December (76%).
The month with the lowest relative humidity is July (70%).
Average rainfall in September
Mount Airy, NC
- Average rainfall in September: 1.69"
The wettest month (with the highest rainfall) is April (2.99").
The driest month (with the least rainfall) is September (1.69").
Average rainfall days in September
Mount Airy, NC
- Average rainfall days in September: 13.2 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is November (8.1 days).
Average snowfall in September
Mount Airy, NC
- Average snowfall in September: 0"
The month with the highest snowfall is February (2.76").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Mount Airy, NC
- 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
Mount Airy, 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 42min).
- Average sunshine in September: 8h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is December (Average sunshine: 5h and 24min).
Average sunshine days in September
Mount Airy, NC
- Average sunshine days in September: 15 days
The months with the most sunshine days are October and November (20.4 days).
The month with the least sunshine days is May (11.6 days).
Average UV index in September
Mount Airy, NC
- 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, February and December (UV index 2).
Average cloud cover in September
Mount Airy, NC
- Average cloud cover in September: 35
The month with the most cloud cover is March (Cloud cover 43).
The months with the least cloud cover are June and July (Cloud cover 29).
Average visibility in September
Mount Airy, NC
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
