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 sea temperature 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
The start of September marks an average high-temperature of a still moderately hot 81.9°F (27.7°C), hardly distinguishable from the conditions in August. Topsail Beach witnesses a consistent average low-temperature of 72°F (22.2°C) throughout September.Heat index
Throughout September, the heat index is evaluated at a hot 87.8°F (31°C). If one continues to be active during exposure, it might cause tiredness and subsequent heat cramps.Factoring in the heat index, values are geared towards shaded areas with light breezes. Direct sunlight might lead to a heat index increase by up to 15 Fahrenheit (8 Celsius) degrees.
Note: The heat index, also known as 'real feel' or 'apparent temperature', reflects the feeling of heat when considering both air temperature and humidity. The impression of weather on a person can be swayed by additional aspects, including metabolic variations, pregnancy, and activity levels. Be aware that direct exposure to sunlight increases heat impact and may raise the heat index by up to 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly important for children. Children often fail to understand the importance of rest and rehydration. Thirst is a late manifestation of dehydration - hence, it is crucial to stay hydrated, especially during ongoing physical activities.
Humidity
In September, the average relative humidity in Topsail Beach is 76%.Rainfall
The month with the most rainfall in Topsail Beach is September, when the rain falls for 14.4 days and typically aggregates up to 2.91" (74mm) of precipitation.Snowfall
March through November are months without snowfall in Topsail Beach.Ocean temperature
In Topsail Beach, the average seawater temperature in September is 80.4°F (26.9°C).Note: Surface water temperatures falling between 77°F (25°C) and 84.2°F (29°C) are regarded as prime and extremely agreeable for enduring periods during any water activity.
Daylight
In September, the average length of the day in Topsail Beach is 12h and 23min.On the first day of September in Topsail Beach, sunrise is at 6:44 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:55 pm EDT.
Sunshine
In Topsail Beach, the average sunshine in September is 9.6h.UV index
The average daily maximum UV index in September in Topsail Beach, North Carolina, is 6. A UV Index value of 6 to 7 symbolizes a high health risk from exposure to the Sun's UV radiation for the average person.Note: The daily high UV index of 6 during September translates into the following recommendations:
Resist overexposure. Safeguarding from solar damage is indispensable. Limit direct sun exposure especially between 10 a.m. and 4 p.m., when UV radiation is at its peak. However, keep in mind that shade structures may not provide full sun protection. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Warning! Reflective surfaces like sand and water amplify the Sun's UV radiation.
Frequently asked questions
What are September temperatures in Topsail Beach?
What is the average humidity in September in Topsail Beach?
What is the wettest month in Topsail Beach?
How much does it rain in Topsail Beach in September?
When it does not snow in Topsail Beach?
What is the water temperature in September in Topsail Beach?
How many hours of daylight does Topsail Beach have in September?
What time are sunrise and sunset in September in Topsail Beach?
How long on average sun shines in September in Topsail Beach?
How high is the UV index in September in Topsail Beach?
Average temperature in September
Topsail Beach, NC
- Average high temperature in September: 81.9°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (54.5°F).
- Average low temperature in September: 72°F
The month with the highest average low temperature is July (77°F).
The coldest month (with the lowest average low temperature) is January (42.4°F).
Average pressure in September
Topsail Beach, NC
- Average pressure in September: 30.01"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.97"Hg).
Average wind speed in September
Topsail Beach, NC
- Average wind speed in September: 9.3mph
The windiest month (with the highest average wind speed) is April (10.9mph).
The calmest month (with the lowest average wind speed) is August (8.2mph).
Average humidity in September
Topsail Beach, NC
- Average humidity in September: 76%
The months with the highest relative humidity are August and December (77%).
The months with the lowest relative humidity are January and March (73%).
Average rainfall in September
Topsail Beach, NC
- Average rainfall in September: 2.91"
The wettest month (with the highest rainfall) is September (2.91").
The driest month (with the least rainfall) is January (0.79").
Average rainfall days in September
Topsail Beach, NC
- Average rainfall days in September: 14.4 days
The month with the highest number of rainy days is August (19.5 days).
The month with the least rainy days is November (8.2 days).
Average snowfall in September
Topsail Beach, NC
- Average snowfall in September: 0"
The months with the highest snowfall are January, February and December (0.04").
The months with the least snowfall are March, April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Topsail Beach, NC
- Average snowfall days in September: 0 days
The months with the highest number of snowfall days are January and February (0.3 days).
The months with the least snowfall days are April, May, June, July, August, September, October and November (0 days).
Average sea temperature in September
Topsail Beach, NC
- Average sea temperature in September: 80.4°F
The best month for swimming (with the highest average sea temperature) is August (82.8°F).
The coldest month (with the lowest average sea temperature) is February (57.5°F).
Average daylight in September /
Average sunshine in September
Topsail Beach, 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 4min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 36min).
Average sunshine days in September
Topsail Beach, NC
- Average sunshine days in September: 13.1 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is August (8.2 days).
Average UV index in September
Topsail Beach, NC
- Average UV index in September: 6
The months with the highest UV index are June, July and August (UV index 7).
The month with the lowest UV index is January (UV index 3).
Average cloud cover in September
Topsail Beach, NC
- Average cloud cover in September: 30
The months with the most cloud cover are February and December (Cloud cover 39).
The months with the least cloud cover are June and July (Cloud cover 26).
Average visibility in September
Topsail Beach, 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).
Topsail Beach, North Carolina, USA
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