September weather forecast
Milton, DE

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Weather in September

The arrival of September signals the transition from summer to fall in Milton, Delaware, bringing a marked shift in weather patterns. The cooling trend begins under a canopy of Fall colors in the city. The majority of precipitation occurs in liquid form as the month records a small amount of rainfall at 0.63" (16mm), the least throughout the year. Daylight hours dwindle further but enough light for outdoor activities still persists. The decrease in wind speed to 7.1mph (11.4km/h) makes it the calmest month of the year.

Temperature

September's onset brings a negligible change in high-temperatures, falling from a moderately hot 81.1°F (27.3°C) in August to a still warm 75.7°F (24.3°C). The average temperature during September nights is registered at a comfortable 65.3°F (18.5°C).

Humidity

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

Rainfall

The month with the least rainfall is September, when the rain falls for 10.8 days and typically collects 0.63" (16mm) of precipitation.

Snowfall

In Milton, snow does not fall in April, June through October.

Daylight

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

Sunshine

In Milton, the average sunshine in September is 9.5h.

UV index

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.
Note: A maximum UV index of 5 in September translates into the following recommendations:
Take care. Persons with lighter skin might suffer burns in less than 30 minutes. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses.

Frequently asked questions

What is the temperature in September?

In September, the average high-temperature and low-temperature are 75.7°F (24.3°C) and 65.3°F (18.5°C) respectively. The average heat index (a.k.a. 'real feel', 'felt air temperature'), which combines air temperature and relative humidity, in August is computed to be 86°F (30°C).

What is the average humidity in September?

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

What is the driest month in Milton?

September is the month with the least rainfall. Rain falls for 10.8 days and accumulates 0.63" (16mm) of precipitation.

How many days does it rain in September?

In Milton, in September, it is raining for 10.8 days, with typically 0.63" (16mm) of accumulated precipitation.

When it does not snow?

April, June through October are months without snowfall.

What is the average length of the day in September?

In Milton, the average day length in September is 12h and 26min.

When is the sunrise / sunset in September?

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

How many hours of sunshine does Milton have in September?

In September, the average sunshine duration is 9.5h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a medium health risk from unprotected exposure to UV radiation.
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
Milton, DE

Average temperature in September - Milton, DE
  • Average high temperature in September: 75.7°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (41°F).

  • Average low temperature in September: 65.3°F

The month with the highest average low temperature is July (71.4°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

Average pressure in September
Milton, DE

Average pressure in September - Milton, 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).

Average wind speed in September
Milton, DE

Average wind speed in September - Milton, DE
  • Average wind speed in September: 8.5mph

The windiest months (with the highest average wind speed) are January and February (10.8mph).
The calmest month (with the lowest average wind speed) is August (7.1mph).

Average humidity in September
Milton, DE

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

The month with the highest relative humidity is May (80%).
The months with the lowest relative humidity are January and November (74%).

Average rainfall in September
Milton, DE

Average rainfall in September - Milton, DE
  • Average rainfall in September: 0.63"

The wettest month (with the highest rainfall) is August (1.38").
The driest month (with the least rainfall) is September (0.63").

Average rainfall days in September
Milton, DE

Average rainfall days in September - Milton, DE
  • Average rainfall days in September: 10.8 days

The month with the highest number of rainy days is July (13.6 days).
The month with the least rainy days is November (6.7 days).

Average snowfall in September
Milton, DE

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

The month with the highest snowfall is January (0.75").
The months with the least snowfall are April, June, July, August, September and October (0").

Average snowfall days in September
Milton, DE

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

The month with the highest number of snowfall days is January (3.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Milton, 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 3min

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).

Average sunshine days in September
Milton, DE

Average sunshine days in September - Milton, DE
  • Average sunshine days in September: 16.3 days

The month with the most sunshine days is November (21.2 days).
The month with the least sunshine days is July (13.3 days).

Average UV index in September
Milton, DE

Average UV index in September - Milton, 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).

Average cloud cover in September
Milton, DE

Average cloud cover in September - Milton, DE
  • Average cloud cover in September: 30

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

Average visibility in September
Milton, DE

Average visibility in September - Milton, 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).

Milton, Delaware, USA

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