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
September brings an average high-temperature of a moderately hot 82.4°F (28°C), showing a slight difference from August's 86.4°F (30.2°C). Longwood records an average nighttime low-temperature of 70.3°F (21.3°C) throughout September.Heat index
Throughout September, the heat index is appraised at a hot 89.6°F (32°C). Long-standing exposure coupled with ongoing activity could result in exhaustion, possibly causing heat cramps.Keep in mind the heat index values are meant for areas in shade and with light wind. A direct sunlight exposure may boost the heat index by 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'felt air temperature' or 'apparent temperature', is an estimation of the warmth sensation when considering humidity levels. The individual's impression of temperature can be affected by numerous factors such as metabolic variations, physical exertion, and attire. Direct sunlight can potentially raise the heat index by 15 Fahrenheit (8 Celsius) degrees, so it's crucial to consider. Heat index values hold particular importance for children. Kids are generally in more danger than adults because they perspire less. Their large skin surface area compared to their small bodies and the excessive heat due to their actions raises their risk.
Humidity
In Longwood, North Carolina, the average relative humidity in September is 77%.Rainfall
In Longwood, in September, during 17.3 rainfall days, 5.08" (129mm) of precipitation is typically accumulated. Throughout the year, there are 179.1 rainfall days, and 41.22" (1047mm) of precipitation is accumulated.Snowfall
March through December are months without snowfall.Daylight
In September, the average length of the day is 12h and 22min.On the first day of the month, sunrise is at 6:48 am and sunset at 7:39 pm. On the last day of September, sunrise is at 7:08 am and sunset at 6:59 pm EDT.
Sunshine
In September, the average sunshine is 9.4h.UV index
The average daily maximum UV index in September in Longwood is 6. A UV Index estimate of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for the average person.Note: The daily high UV index of 6 during September translates into the following recommendations:
Steer clear of overexposure. Fair-skinned individuals can be scorched in less than 20 minutes. Be aware that the sun's UV radiation is strongest between 10 a.m. and 4 p.m. and try to reduce direct sun exposure during this period as much as possible. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
How hot is September?
What is the average humidity in September?
How much does it rain in September?
When it does not snow in Longwood?
What is the average length of the day in September?
What time are sunrise and sunset in September?
How many hours of sunshine does Longwood have in September?
What is the UV index intensity in September?
Average temperature in September
Longwood, NC
- Average high temperature in September: 82.4°F
The warmest month (with the highest average high temperature) is July (87.3°F).
The month with the lowest average high temperature is January (54.3°F).
- Average low temperature in September: 70.3°F
The month with the highest average low temperature is July (75.7°F).
The coldest month (with the lowest average low temperature) is January (41°F).
Average pressure in September
Longwood, NC
- Average pressure in September: 30"Hg
The months with the highest atmospheric pressure are January and December (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Longwood, NC
- Average wind speed in September: 8.4mph
The windiest month (with the highest average wind speed) is April (10.1mph).
The calmest month (with the lowest average wind speed) is August (7.4mph).
Average humidity in September
Longwood, NC
- Average humidity in September: 77%
The months with the highest relative humidity are May, June, August and December (78%).
The month with the lowest relative humidity is January (74%).
Average rainfall in September
Longwood, NC
- Average rainfall in September: 5.08"
The wettest month (with the highest rainfall) is August (5.91").
The driest month (with the least rainfall) is January (1.73").
Average rainfall days in September
Longwood, NC
- Average rainfall days in September: 17.3 days
The months with the highest number of rainy days are July and August (21.1 days).
The month with the least rainy days is November (10.2 days).
Average snowfall in September
Longwood, NC
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.28").
The months with the least snowfall are March, April, May, June, July, August, September, October, November and December (0").
Average snowfall days in September
Longwood, 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 April, May, June, July, August, September, October and November (0 days).
Average daylight in September /
Average sunshine in September
Longwood, NC
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 24min).
The month with the shortest days is December (Average daylight: 9h and 54min).
- Average sunshine in September: 9h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The months with the least sunshine are January and December (Average sunshine: 5h and 24min).
Average sunshine days in September
Longwood, NC
- Average sunshine days in September: 10.8 days
The month with the most sunshine days is January (18.1 days).
The month with the least sunshine days is August (6.6 days).
Average UV index in September
Longwood, NC
- Average UV index in September: 6
The months with the highest UV index are June and July (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Longwood, NC
- Average cloud cover in September: 32
The months with the most cloud cover are February and December (Cloud cover 41).
The months with the least cloud cover are June and July (Cloud cover 28).
Average visibility in September
Longwood, 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).
Longwood, North Carolina, USA
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