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
Dover's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's 81.1°F (27.3°C) to a still moderately hot 73.9°F (23.3°C). September nights cool down to an average low-temperature of 55.6°F (13.1°C).Humidity
In Dover, the average relative humidity in September is 79%.Rainfall
September is the month with the least rainfall in Dover. Rain falls for 6.3 days and accumulates 0.16" (4mm) of precipitation.Snowfall
In Dover, snow does not fall in June through September.Daylight
In Dover, the average length of the day in September is 12h and 27min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:30 pm. On the last day of September, in Dover, sunrise is at 6:54 am and sunset at 6:41 pm EDT.
Sunshine
The average sunshine in September in Dover is 8.4h.UV index
In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: An average maximum UV index of 4 in September leads to these recommendations:
Exercise prevention - Warding off sunburn is urged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. To cut down UV radiation exposure by about half, sport a wide-brim hat.
Frequently asked questions
What are the temperatures in Dover in September?
What is the average humidity in September in Dover?
What is the driest month in Dover?
How many days does it rain in September in Dover?
When it does not snow in Dover?
Does it snow in Dover in September?
How many hours of daylight does Dover have in September?
When is the sunrise / sunset in September in Dover?
How long on average sun shines in September in Dover?
What is the UV index intensity in September in Dover?
Average temperature in September
Dover, NJ
- Average high temperature in September: 73.9°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (34.3°F).
- Average low temperature in September: 55.6°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (20.8°F).
Average pressure in September
Dover, NJ
- Average pressure in September: 30.06"Hg
The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in September
Dover, NJ
- Average wind speed in September: 5.5mph
The windiest month (with the highest average wind speed) is March (8.2mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).
Average humidity in September
Dover, NJ
- Average humidity in September: 79%
The months with the highest relative humidity are February, October and December (81%).
The month with the lowest relative humidity is April (75%).
Average rainfall in September
Dover, NJ
- Average rainfall in September: 0.16"
The wettest month (with the highest rainfall) is July (0.79").
The driest month (with the least rainfall) is September (0.16").
Average rainfall days in September
Dover, NJ
- Average rainfall days in September: 6.3 days
The month with the highest number of rainy days is July (9.5 days).
The month with the least rainy days is February (4 days).
Average snowfall in September
Dover, NJ
- Average snowfall in September: 0"
The month with the highest snowfall is March (0.79").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in September
Dover, NJ
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is February (5.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in September /
Average sunshine in September
Dover, NJ
- Average daylight in September: 12h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in September: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in September
Dover, NJ
- Average sunshine days in September: 21.8 days
The month with the most sunshine days is November (24.5 days).
The month with the least sunshine days is July (18.3 days).
Average UV index in September
Dover, NJ
- Average UV index in September: 4
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).
Average cloud cover in September
Dover, NJ
- Average cloud cover in September: 42
The months with the most cloud cover are February and March (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 36).
Average visibility in September
Dover, NJ
- Average visibility in September: 5mi
The months with the highest visibility are January, March, April, November and December (6mi).
The months with the lowest visibility are February, May, June, July, August, September and October (5mi).
Dover, New Jersey, USA
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