September weather forecast and climate
Georgetown, DE

Weather in September

September, the first month of the autumn, in Georgetown, is still a warm month, with temperature in the range of an average high of 76.1°F (24.5°C) and an average low of 64.2°F (17.9°C).

Temperature

In September, the average high-temperature marginally drops, from 81.7°F (27.6°C) in August, to a still moderately hot 76.1°F (24.5°C). In September, in Georgetown, the average low-temperature is 64.2°F (17.9°C).

Humidity

In Georgetown, the average relative humidity is 79%.

Rainfall

In Georgetown, Delaware, during September, the rain falls for 13.7 days and regularly aggregates up to 1.81" (46mm) of precipitation. Throughout the year, in Georgetown, there are 151.1 rainfall days, and 26.02" (661mm) of precipitation is accumulated.

Snowfall

April through October are months without snowfall in Georgetown.

Daylight

In September, the average length of the day is 12.4h.

Sunshine

The average sunshine in Georgetown is 9.5h.

UV index

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unsafe exposure to the UV radiation for average individuals.
Note: In September, the average maximum UV index of 5 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the average humidity in September in Georgetown?

In September, the average relative humidity is 79%.

How many days does it rain in September in Georgetown?

In September, in Georgetown, Delaware, the rain falls for 13.7 days. Throughout September, 1.81" (46mm) of precipitation is accumulated.

When it does not snow in Georgetown?

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

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

In September, the average length of the day in Georgetown is 12.4h.

How long on average sun shines in September in Georgetown?

In September, the average sunshine in Georgetown, Delaware, is 9.5h.

How high is the UV index in September in Georgetown?

The average daily maximum UV index in September in Georgetown, Delaware, is 5. A UV Index of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV radiation.

Average temperature in September
Georgetown, DE

Average temperature in September - Georgetown, DE
  • Average high temperature in September: 76.1°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 (41.4°F).

  • Average low temperature in September: 64.2°F

The month with the highest average low temperature is July (70.9°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).

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Average pressure in September
Georgetown, DE

Average pressure in September - Georgetown, DE
  • Average pressure in September: 30.04"

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

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Average wind speed in September
Georgetown, DE

Average wind speed in September - Georgetown, DE
  • Average wind speed in September: 8mph

The windiest month (with the highest average wind speed) is February (10.5mph).
The calmest month (with the lowest average wind speed) is August (6.7mph).

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Average humidity in September
Georgetown, DE

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

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

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Average rainfall in September
Georgetown, DE

Average rainfall in September - Georgetown, DE
  • Average rainfall in September: 1.81"

The wettest month (with the highest rainfall) is August (3.07").
The driest month (with the least rainfall) is January (1.57").

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Average rainfall days in September
Georgetown, DE

Average rainfall days in September - Georgetown, DE
  • Average rainfall days in September: 13.7 days

The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is January (8.1 days).

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Average snowfall in September
Georgetown, DE

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

The month with the highest snowfall is January (1.61").
Months with the least snowfall are April, May, June, July, August, September and October (0").

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Average snowfall days in September
Georgetown, DE

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

The month with the highest number of snowfall days is January (3.7 days).
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
Georgetown, DE

Average daylight in September / Average sunshine in September - Georgetown, DE
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 9.5h

The month with the most sunshine is July (Average sunshine: 10.9h).
The month with the least sunshine is February (Average sunshine: 5.1h).

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Average sunshine days in September
Georgetown, DE

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

The month with the most sunshine days is January (19.2 days).
The month with the least sunshine days is July (11.3 days).

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Average UV index in September
Georgetown, DE

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

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

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Average cloud cover in September
Georgetown, DE

Average cloud cover in September - Georgetown, 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 27).

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Average visibility in September
Georgetown, DE

Average visibility in September - Georgetown, DE
  • Average visibility in September: 6mi

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

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