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, Swannanoa experiences a minor shift in meteorological conditions with average high-temperatures marked at a still moderately hot 77.4°F (25.2°C), closely mirroring the climate in August. Swannanoa observes a substantial disparity between daytime high and the average low-temperature of 55.8°F (13.2°C) during September nights.Humidity
The months with the highest humidity in Swannanoa are May and September, with an average relative humidity of 78%.Rainfall
The month with the least rainfall in Swannanoa is September, when the rain falls for 13.3 days and typically collects 1.54" (39mm) of precipitation.Snowfall
In Swannanoa, snow does not fall in May through October.Daylight
In September, the average length of the day 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
In Swannanoa, the average sunshine in September is 8.4h.UV index
The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from unsafe exposure to UV radiation for ordinary individuals.Note: The maximum daily UV index of 4 during September translates into the following directions:
Undertake protective steps - Obligation to safeguard skin and eyes from harm is in place. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in September?
What are the most humid months?
What is the average humidity in September?
What is the driest month?
How much does it rain in Swannanoa in September?
When it does not snow in Swannanoa?
How many hours of daylight does Swannanoa have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Swannanoa have in September?
What is the UV index reading in September?
Average temperature in September
Swannanoa, NC
- Average high temperature in September: 77.4°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (43.5°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).
Average pressure in September
Swannanoa, NC
- Average pressure in September: 30.05"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
Swannanoa, NC
- Average wind speed in September: 3.8mph
The windiest months (with the highest average wind speed) are January, February and April (6.2mph).
The calmest month (with the lowest average wind speed) is August (3.4mph).
Average humidity in September
Swannanoa, NC
- Average humidity in September: 78%
The months with the highest relative humidity are May and September (78%).
The months with the lowest relative humidity are January and November (74%).
Average rainfall in September
Swannanoa, NC
- Average rainfall in September: 1.54"
The wettest months (with the highest rainfall) are April and December (3.07").
The driest month (with the least rainfall) is September (1.54").
Average rainfall days in September
Swannanoa, NC
- Average rainfall days in September: 13.3 days
The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is November (8.5 days).
Average snowfall in September
Swannanoa, NC
- Average snowfall in September: 0"
The month with the highest snowfall is December (4.37").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Swannanoa, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (4.2 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
Swannanoa, 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 2min
The month with the most sunshine is June (Average sunshine: 10h and 48min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Swannanoa, NC
- Average sunshine days in September: 14.8 days
The month with the most sunshine days is October (20.1 days).
The month with the least sunshine days is July (10.4 days).
Average UV index in September
Swannanoa, NC
- Average UV index in September: 4
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
Swannanoa, NC
- Average cloud cover in September: 36
The months with the most cloud cover are February and March (Cloud cover 43).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in September
Swannanoa, NC
- Average visibility in September: 5mi
The months with the highest visibility are June, July, August and November (6mi).
The months with the lowest visibility are January, February, March, April, May, September, October and December (5mi).
Swannanoa, North Carolina, USA
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