Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
September's onset in Georgetown corresponds with a subtle shift in the average high-temperature, slightly moving from a warm 81.7°F (27.6°C) in August to a still moderately hot 76.1°F (24.5°C). Georgetown's nighttime temperature during September is consistently averaged at a refreshing 64.2°F (17.9°C).Humidity
In September, the average relative humidity is 79%.Rainfall
In September, in Georgetown, the rain falls for 13.7 days. Throughout September, 1.81" (46mm) of precipitation is accumulated. Throughout the year, in Georgetown, there are 151.1 rainfall days, and 26.02" (661mm) of precipitation is accumulated.Snowfall
In Georgetown, snow does not fall in April through October.Daylight
In September, the average length of the day is 12h and 26min.On the first day of the month, sunrise is at 6:31 am and sunset at 7:31 pm. On the last day of September, in Georgetown, sunrise is at 6:57 am and sunset at 6:45 pm EDT.
Sunshine
The average sunshine in September in Georgetown is 9.5h.UV index
In September, the average daily maximum UV index is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: An average UV index of 5 in September transforms into this advice:
Put precautions into practice - Guidance to elude sunburn is provided. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Stay sun-safe with clothing that is both closely woven and worn loosely.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are September temperatures in Georgetown?
What is the average humidity in September in Georgetown?
How much does it rain in Georgetown in September?
When it does not snow in Georgetown?
How many hours of daylight does Georgetown have in September?
When is the sunrise / sunset in September in Georgetown?
How long on average sun shines in September in Georgetown?
How high is the UV index in September in Georgetown?
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).
Average pressure in September
Georgetown, 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
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).
Average humidity in September
Georgetown, 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
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").
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).
Average snowfall in September
Georgetown, DE
- Average snowfall in September: 0"
The month with the highest snowfall is January (1.61").
The months with the least snowfall are April, May, June, July, August, September and October (0").
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).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Georgetown, 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: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
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).
Average UV index in September
Georgetown, 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
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).
Average visibility in September
Georgetown, 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).
Georgetown, Delaware, USA
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