September weather forecast and climate
Dover, NJ

Weather in September

The first month of the autumn, September, is also a moderately hot month in Dover, New Jersey, with average temperature varying between 73.9°F (23.3°C) and 55.6°F (13.1°C).

Temperature

In Dover, the average high-temperature marginally drops, from a warm 81.1°F (27.3°C) in August, to a still moderately hot 73.9°F (23.3°C). In September, the average low-temperature is 55.6°F (13.1°C).

Humidity

The average relative humidity in Dover 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

The average length of the day in Dover, New Jersey, is 12.4h.

Sunshine

In September, the average sunshine in Dover is 8.4h.

UV index

The average daily maximum UV index in Dover is 4. A UV Index reading of 3 to 5 represents a moderate threat to health from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 4 in September interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Dover?

The average high-temperature, in September, is 73.9°F (23.3°C), while the average low-temperature is 55.6°F (13.1°C).

What is the average humidity in September in Dover?

The average relative humidity in September in Dover, New Jersey, is 79%.

How much does it rain in Dover in September?

In Dover, in September, it is raining for 6.3 days, with typically 0.16" (4mm) of accumulated precipitation.

What is the driest month in Dover?

The month with the least rainfall in Dover, New Jersey, is September when the rain falls for 6.3 days and typically collects 0.16" (4mm) of precipitation.

Does it snow in Dover in September?

In Dover, New Jersey, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in Dover?

June through September are months without snowfall in Dover, New Jersey.

What is the average length of the day in September in Dover?

In Dover, New Jersey, the average length of the day in September is 12.4h.

How long on average sun shines in September in Dover?

In Dover, the average sunshine in September is 8.4h.

How high is the UV index in September in Dover?

The average daily maximum UV index in September in Dover is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.

Average temperature in September
Dover, NJ

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).

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Average pressure in September
Dover, NJ

Average pressure in September - Dover, NJ
  • Average pressure in September: 30.06"

The month with the highest atmospheric pressure is November (30.11").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in September
Dover, NJ

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).

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Average humidity in September
Dover, NJ

Average humidity in September - Dover, NJ
  • Average humidity in September: 79%

Months with the highest relative humidity are February, October and December (81%).
The month with the lowest relative humidity is April (75%).

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Average rainfall in September
Dover, NJ

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").

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Average rainfall days in September
Dover, NJ

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).

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Average snowfall in September
Dover, NJ

Average snowfall in September - Dover, NJ
  • Average snowfall in September: 0"

The month with the highest snowfall is March (0.79").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Dover, NJ

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).
Months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Dover, NJ

Average daylight in September / Average sunshine in September - Dover, NJ
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in September: 8.4h

The month with the most sunshine is July (Average sunshine: 10.2h).
The month with the least sunshine is February (Average sunshine: 4.4h).

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Average sunshine days in September
Dover, NJ

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).

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Average UV index in September
Dover, NJ

Average UV index in September - Dover, NJ
  • Average UV index in September: 4

Months with the highest UV index are June and July (UV index 6).
Months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in September
Dover, NJ

Average cloud cover in September - Dover, NJ
  • Average cloud cover in September: 42

Months with the most cloud cover are February and March (Cloud cover 51).
Months with the least cloud cover are July and August (Cloud cover 36).

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Average visibility in September
Dover, NJ

Average visibility in September - Dover, NJ
  • Average visibility in September: 5mi

Months with the highest visibility are January, March, April, November and December (6mi).
Months with the lowest visibility are February, May, June, July, August, September and October (5mi).

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