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 implies a soft temperature shift, with average high-temperatures reducing from August's warm 82.6°F (28.1°C) to a still moderately hot 76.6°F (24.8°C). September nights in Seaford are marked by an average low-temperature of 62.8°F (17.1°C).Humidity
May, August and September, with an average relative humidity of 80%, are the most humid months.Rainfall
September is the month with the least rainfall in Seaford. Rain falls for 7.7 days and accumulates 0.39" (10mm) of precipitation.Snowfall
In Seaford, snow does not fall in April through October.Daylight
The average length of the day in September in Seaford is 12h and 26min.On the first day of September in Seaford, Delaware, sunrise is at 6:32 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:46 pm EDT.
Sunshine
In September, the average sunshine is 9.2h.UV index
In September, the average daily maximum UV index in Seaford is 5. A UV Index of 3 to 5 symbolizes a moderate health risk from unprotected exposure to Sun's UV rays for the ordinary person.Note: In September, the maximum UV index of 5 suggests this advice:
Adopt protective measures - Suggestions to resist sunburn are offered. To guard against the harmful effects of the Sun, minimize exposure during midday. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average September temperature in Seaford?
What are the most humid months in Seaford?
What is the average humidity in September in Seaford?
What is the driest month in Seaford?
How much does it rain in Seaford in September?
When it does not snow in Seaford?
How many hours of daylight does Seaford have in September?
What time are sunrise and sunset in September in Seaford?
How long on average sun shines in September in Seaford?
What is the UV index intensity in September in Seaford?
Average temperature in September
Seaford, DE
- Average high temperature in September: 76.6°F
The warmest month (with the highest average high temperature) is July (84.4°F).
The month with the lowest average high temperature is January (41.5°F).
- Average low temperature in September: 62.8°F
The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (29.1°F).
Average pressure in September
Seaford, 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
Seaford, DE
- Average wind speed in September: 7mph
The windiest month (with the highest average wind speed) is February (9.7mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Seaford, DE
- Average humidity in September: 80%
The months with the highest relative humidity are May, August and September (80%).
The month with the lowest relative humidity is January (74%).
Average rainfall in September
Seaford, DE
- Average rainfall in September: 0.39"
The wettest months (with the highest rainfall) are July and August (1.06").
The driest month (with the least rainfall) is September (0.39").
Average rainfall days in September
Seaford, DE
- Average rainfall days in September: 7.7 days
The month with the highest number of rainy days is July (12 days).
The month with the least rainy days is November (4.9 days).
Average snowfall in September
Seaford, DE
- Average snowfall in September: 0"
The month with the highest snowfall is January (0.35").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in September
Seaford, DE
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (2 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
Seaford, 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 1min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in September
Seaford, DE
- Average sunshine days in September: 19.6 days
The month with the most sunshine days is November (23.9 days).
The month with the least sunshine days is July (15.7 days).
Average UV index in September
Seaford, 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
Seaford, DE
- Average cloud cover in September: 34
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in September
Seaford, 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).
Seaford, Delaware, USA
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