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's arrival aligns with a minor decrease in average high-temperatures, from August's hot 86.9°F (30.5°C) to a moderately hot 81.5°F (27.5°C). Dover experiences an average nighttime temperature of 65.3°F (18.5°C) in the month of September.Heat index
The heat index for September is calculated to be a hot 87.8°F (31°C). Ongoing activity coupled with exposure often results in weariness and could induce heat cramps.Research indicates the heat index considers values in shaded locales and with light winds. Heat index values may surge by up to 15 Fahrenheit (8 Celsius) degrees in the presence of direct sunlight.
Note: The heat index, also known as 'real feel' or 'apparent temperature', marries air temperature and humidity to produce a value illustrating perceived warmth. Additional factors encompassing metabolic differences, the level of physical activity, and clothing can impact the individual's perception of temperature. Given the impact of direct sunlight, it's noteworthy that the felt temperature can rise by 15 Fahrenheit (8 Celsius) degrees. Heat index values are particularly relevant to babies and toddlers. Young ones often underestimate the need for rest and rehydration. Thirst appears late in dehydration - hence, it is important to keep hydrated, particularly during prolonged physical activities.
Humidity
August and September, with an average relative humidity of 79%, are the most humid months.Rainfall
In Dover, in September, it is raining for 14.1 days, with typically 3.74" (95mm) of accumulated precipitation. In Dover, during the entire year, the rain falls for 172 days and collects up to 35.2" (894mm) of precipitation.Snowfall
April through November are months without snowfall.Daylight
The average length of the day in September is 12h and 23min.On the first day of September, sunrise is at 6:42 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:04 am and sunset at 6:54 pm EDT.
Sunshine
In September, the average sunshine is 9.1h.UV index
In Dover, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In September, a regular UV index of 5 translates into these guidelines:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the usual temperature for Dover in September?
What is the most humid month?
What is the average humidity in September?
How much does it rain in September?
When it does not snow?
How many hours of daylight does Dover have in September?
When are sunrise and sunset in September?
How many hours of sunshine does Dover have in September?
What is the UV index intensity in September?
Average temperature in September
Dover, NC
- Average high temperature in September: 81.5°F
The warmest month (with the highest average high temperature) is July (88.3°F).
The month with the lowest average high temperature is January (49.8°F).
- Average low temperature in September: 65.3°F
The month with the highest average low temperature is July (71.8°F).
The coldest month (with the lowest average low temperature) is January (34.5°F).
Average pressure in September
Dover, NC
- Average pressure in September: 30.02"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in September
Dover, NC
- Average wind speed in September: 6.5mph
The windiest month (with the highest average wind speed) is April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity in September
Dover, NC
- Average humidity in September: 79%
The months with the highest relative humidity are August and September (79%).
The months with the lowest relative humidity are January and March (74%).
Average rainfall in September
Dover, NC
- Average rainfall in September: 3.74"
The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (2.01").
Average rainfall days in September
Dover, NC
- Average rainfall days in September: 14.1 days
The month with the highest number of rainy days is July (20.2 days).
The month with the least rainy days is November (10 days).
Average snowfall in September
Dover, NC
- Average snowfall in September: 0"
The month with the highest snowfall is February (0.91").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").
Average snowfall days in September
Dover, NC
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (1.7 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Dover, 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: 9h and 1min
The months with the most sunshine are June and July (Average sunshine: 10h and 36min).
The months with the least sunshine are January and December (Average sunshine: 5h and 30min).
Average sunshine days in September
Dover, NC
- Average sunshine days in September: 13.5 days
The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is July (7.8 days).
Average UV index in September
Dover, NC
- Average UV index in September: 5
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 2).
Average cloud cover in September
Dover, NC
- Average cloud cover in September: 37
The month with the most cloud cover is February (Cloud cover 42).
The month with the least cloud cover is June (Cloud cover 32).
Average visibility in September
Dover, NC
- Average visibility in September: 5mi
The months with the highest visibility are January, February, March, April, May, June, July, October, November and December (6mi).
The months with the lowest visibility are August and September (5mi).
Dover, North Carolina, USA
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