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
In September, the average high-temperature marginally drops from a warm 84.2°F (29°C) in August to a still moderately hot 78.6°F (25.9°C). Flat Rock experiences a mean temperature of 57.6°F (14.2°C) during September nights.Humidity
The average relative humidity in September in Flat Rock is 76%.Rainfall
September is the month with the least rainfall in Flat Rock. Rain falls for 14.1 days and accumulates 1.97" (50mm) of precipitation.Snowfall
In Flat Rock, snow does not fall in May through October.Daylight
In Flat Rock, the average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 7:02 am and sunset at 7:56 pm. On the last day of the month, sunrise is at 7:24 am and sunset at 7:14 pm EDT.
Sunshine
The average sunshine in September in Flat Rock is 8.5h.UV index
The average daily maximum UV index in September in Flat Rock is 5. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In September, the maximum UV index of 5 suggests these recommendations:
Preventative actions are necessary - Recommendations to ward off sunburn are given. It's recommended to limit sun exposure when its radiation is at its peak during midday. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Flat Rock in September?
What is the average humidity in September in Flat Rock?
What is the driest month in Flat Rock?
How much does it rain in Flat Rock in September?
When it does not snow in Flat Rock?
What is the average length of the day in September in Flat Rock?
When is the sunrise / sunset in September in Flat Rock?
How long on average sun shines in September in Flat Rock?
How high is the UV index in September in Flat Rock?
Average temperature in September
Flat Rock, NC
- Average high temperature in September: 78.6°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (45.5°F).
- Average low temperature in September: 57.6°F
The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (29.3°F).
Average pressure in September
Flat Rock, NC
- Average pressure in September: 30.04"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
Flat Rock, NC
- Average wind speed in September: 4.1mph
The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest month (with the lowest average wind speed) is August (3.6mph).
Average humidity in September
Flat Rock, NC
- Average humidity in September: 76%
The months with the highest relative humidity are May and December (77%).
The months with the lowest relative humidity are January, July and November (73%).
Average rainfall in September
Flat Rock, NC
- Average rainfall in September: 1.97"
The wettest month (with the highest rainfall) is December (3.9").
The driest month (with the least rainfall) is September (1.97").
Average rainfall days in September
Flat Rock, NC
- Average rainfall days in September: 14.1 days
The month with the highest number of rainy days is July (19.9 days).
The month with the least rainy days is November (9 days).
Average snowfall in September
Flat Rock, NC
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.72").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Flat Rock, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (3.9 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Flat Rock, NC
- Average daylight in September: 12h and 2min
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 48min).
- Average sunshine in September: 8h and 3min
The month with the most sunshine is June (Average sunshine: 10h and 54min).
The month with the least sunshine is December (Average sunshine: 5h and 42min).
Average sunshine days in September
Flat Rock, NC
- Average sunshine days in September: 13.7 days
The months with the most sunshine days are October and November (19.3 days).
The month with the least sunshine days is July (7.9 days).
Average UV index in September
Flat Rock, NC
- Average UV index in September: 5
The months with the highest UV index are 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
Flat Rock, NC
- Average cloud cover in September: 33
The month with the most cloud cover is March (Cloud cover 41).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility in September
Flat Rock, NC
- Average visibility in September: 5mi
The months with the highest visibility are February, March, April, June, July, August, October and November (6mi).
The months with the lowest visibility are January, May, September and December (5mi).
Flat Rock, North Carolina, USA
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