September weather forecast
Millville, DE

Weather in September

The first month of the autumn, September, is also a moderately hot month in Millville, Delaware, with an average temperature ranging between min 68°F (20°C) and max 74.3°F (23.5°C).

Temperature

In Millville, Delaware, the average high-temperature in September marginally drops from 79.7°F (26.5°C) in August to a still moderately hot 74.3°F (23.5°C). In September, the average low-temperature is 68°F (20°C).

Humidity

In Millville, the average relative humidity in September is 78%.

Rainfall

In Millville, during September, the rain falls for 12.9 days and regularly aggregates up to 1.85" (47mm) of precipitation. In Millville, during the entire year, the rain falls for 144.6 days and collects up to 25.51" (648mm) of precipitation.

Snowfall

April through October are months without snowfall in Millville, Delaware.

Daylight

In Millville, the average length of the day in September is 12h and 25min.
On the first day of the month, sunrise is at 6:29 am and sunset at 7:30 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:45 pm EDT.

Sunshine

The average sunshine in September is 9.3h.

UV index

In September, the average daily maximum UV index in Millville is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for average individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the average humidity in September in Millville?

The average relative humidity in September in Millville, Delaware, is 78%.

How many days does it rain in September in Millville?

In September, in Millville, the rain falls for 12.9 days. Throughout September, 1.85" (47mm) of precipitation is accumulated.

When it does not snow in Millville?

April through October are months without snowfall.

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

In Millville, Delaware, the average day length in September is 12h and 25min.

What time are sunrise and sunset in September in Millville?

In September, on the first day of the month, sunrise is at 6:29 am and sunset at 7:30 pm. On the last day of the month, in Millville, Delaware, sunrise is at 6:55 am and sunset at 6:45 pm EDT.

How many hours of sunshine does Millville have in September?

In Millville, Delaware, the average sunshine duration in September is 9.3h.

How high is the UV index in September in Millville?

In September, the average daily maximum UV index in Millville is 5. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Millville, DE

Average temperature in September - Millville, DE
  • Average high temperature in September: 74.3°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (42.1°F).

  • Average low temperature in September: 68°F

The month with the highest average low temperature is July (73.4°F).
The coldest month (with the lowest average low temperature) is January (32.9°F).

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Average pressure in September
Millville, DE

Average pressure in September - Millville, DE
  • Average pressure in September: 30.04"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in September
Millville, DE

Average wind speed in September - Millville, DE
  • Average wind speed in September: 10.6mph

The windiest month (with the highest average wind speed) is January (12.8mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).

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Average humidity in September
Millville, DE

Average humidity in September - Millville, DE
  • Average humidity in September: 78%

The month with the highest relative humidity is May (82%).
The months with the lowest relative humidity are January and November (74%).

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Average rainfall in September
Millville, DE

Average rainfall in September - Millville, DE
  • Average rainfall in September: 1.85"

The wettest months (with the highest rainfall) are July and August (2.87").
The driest month (with the least rainfall) is January (1.5").

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Average rainfall days in September
Millville, DE

Average rainfall days in September - Millville, DE
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is July (15.3 days).
The month with the least rainy days is January (7.4 days).

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Average snowfall in September
Millville, DE

Average snowfall in September - Millville, DE
  • Average snowfall in September: 0"

The month with the highest snowfall is February (0.87").
The months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Millville, DE

Average snowfall days in September - Millville, DE
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (2.6 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Millville, DE

Average daylight in September / Average sunshine in September - Millville, DE
  • Average daylight in September: 12h and 25min

The month with the longest days is June (Average daylight: 14h and 49min).
The month with the shortest days is December (Average daylight: 9h and 32min).

  • Average sunshine in September: 9h and 18min

The month with the most sunshine is July (Average sunshine: 10h and 54min).
The months with the least sunshine are February and December (Average sunshine: 5h and 6min).

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Average sunshine days in September
Millville, DE

Average sunshine days in September - Millville, DE
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is January (19.7 days).
The month with the least sunshine days is July (12.9 days).

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Average UV index in September
Millville, DE

Average UV index in September - Millville, DE
  • Average UV index in September: 5

The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 2).

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Average cloud cover in September
Millville, DE

Average cloud cover in September - Millville, DE
  • Average cloud cover in September: 32

The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 26).

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Average visibility in September
Millville, DE

Average visibility in September - Millville, DE
  • 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).

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