September weather forecast
Millsboro, DE

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Weather in September

As summer fades into fall, September in Millsboro showcases a notable decrease in temperature. The rainfall drops to 1.73" (44mm), indicating the beginning of a drier period. The daylight hours are reduced to 12.4 hours, indicating the onset of shorter days. On the other hand, sunshine persists with 9.4 hours per day, leaving plenty of room for city exploration. Along with the breeze blowing at 8.8mph (14.2km/h), September ushers in the welcoming change of fall.

Temperature

Millsboro observes an average high-temperature of a still moderately hot 75.9°F (24.4°C) in September, barely different from 81°F (27.2°C) in August. Millsboro observes an average nighttime low-temperature of 65.7°F (18.7°C) during the month of September.

Humidity

In September, the average relative humidity in Millsboro is 79%.

Rainfall

In Millsboro, in September, it is raining for 13.5 days, with typically 1.73" (44mm) of accumulated precipitation. Throughout the year, in Millsboro, there are 146.8 rainfall days, and 25.2" (640mm) of precipitation is accumulated.

Snowfall

In Millsboro, snow does not fall in April through October.

Daylight

In Millsboro, Delaware, the average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:31 am and sunset at 7:30 pm. On the last day of September, in Millsboro, Delaware, sunrise is at 6:56 am and sunset at 6:45 pm EDT.

Sunshine

The average sunshine in September in Millsboro is 9.4h.

UV index

In Millsboro, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from unsafe exposure to UV radiation for the ordinary person.
Note: An average maximum UV index of 5 in September leads to these recommendations:
Make use of precautions - It is urged to ward off sun damage. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. 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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Frequently asked questions

What are the temperatures in Millsboro in September?

Millsboro in September has an average high-temperature of 75.9°F (24.4°C) and an average low-temperature of 65.7°F (18.7°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which represents the influence of relative humidity on air temperature, is estimated at 86°F (30°C).

What is the average humidity in September in Millsboro?

The average relative humidity in September in Millsboro is 79%.

How many days does it rain in September in Millsboro?

In September, the rain falls for 13.5 days. Throughout September, 1.73" (44mm) of precipitation is accumulated.

When it does not snow in Millsboro?

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

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

The average day length in September in Millsboro, Delaware, is 12h and 26min.

When is the sunrise / sunset in September in Millsboro?

On the first day of September, sunrise is at 6:31 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:45 pm EDT.

How long on average sun shines in September in Millsboro?

In September, the average sunshine duration in Millsboro is 9.4h.

What is the UV index intensity in September in Millsboro?

In Millsboro, Delaware, the average daily maximum UV index in September is 5. A UV Index value of 3 to 5 symbolizes a medium health risk from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Millsboro, DE

Average temperature in September - Millsboro, DE
  • Average high temperature in September: 75.9°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (41.7°F).

  • Average low temperature in September: 65.7°F

The month with the highest average low temperature is July (71.6°F).
The coldest month (with the lowest average low temperature) is January (31.5°F).

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Average pressure in September
Millsboro, DE

Average pressure in September - Millsboro, 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
Millsboro, DE

Average wind speed in September - Millsboro, DE
  • Average wind speed in September: 8.8mph

The windiest months (with the highest average wind speed) are January, February and March (11.1mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).

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Average humidity in September
Millsboro, DE

Average humidity in September - Millsboro, DE
  • Average humidity in September: 79%

The month with the highest relative humidity is May (81%).
The months with the lowest relative humidity are January and November (74%).

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Average rainfall in September
Millsboro, DE

Average rainfall in September - Millsboro, DE
  • Average rainfall in September: 1.73"

The wettest months (with the highest rainfall) are July and August (2.95").
The driest month (with the least rainfall) is January (1.46").

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Average rainfall days in September
Millsboro, DE

Average rainfall days in September - Millsboro, DE
  • Average rainfall days in September: 13.5 days

The month with the highest number of rainy days is July (16.7 days).
The month with the least rainy days is January (7.4 days).

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Average snowfall in September
Millsboro, DE

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

The month with the highest snowfall is January (1.22").
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
Millsboro, DE

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

The month with the highest number of snowfall days is January (3.1 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Millsboro, DE
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 14h and 48min).
The month with the shortest days is December (Average daylight: 9h and 30min).

  • Average sunshine in September: 9h and 2min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).

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Average sunshine days in September
Millsboro, DE

Average sunshine days in September - Millsboro, DE
  • Average sunshine days in September: 14.3 days

The month with the most sunshine days is January (20.1 days).
The month with the least sunshine days is July (12.2 days).

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Average UV index in September
Millsboro, DE

Average UV index in September - Millsboro, 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
Millsboro, DE

Average cloud cover in September - Millsboro, DE
  • Average cloud cover in September: 31

The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 26).

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Average visibility in September
Millsboro, DE

Average visibility in September - Millsboro, 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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Millsboro, Delaware, USA

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