September weather forecastCheswold, DE
September
Weather in September
Cheswold transitions from summer to fall in September, with temperatures decreasing to an average high of 76.6°F (24.8°C). While still warm, the weather becomes visibly temperate. The change in weather brings about a shift in flora and fauna as Cheswold’s landscape begins to showcase its autumn hues. September also marks the decline in daylight hours, setting the stage for shorter and cooler days in the months to follow.Temperature
During the shift to September, Cheswold records a mild decrease in average high-temperature, moving from a moderately hot 82.4°F (28°C) in August to a still warm 76.6°F (24.8°C). During September, the nighttime temperature in Cheswold averages of 61.9°F (16.6°C).Humidity
In September, the average relative humidity is 78%.Rainfall
In September, the rain falls for 14.3 days. Throughout September, 2.32" (59mm) of precipitation is accumulated. Throughout the year, there are 169.2 rainfall days, and 34.96" (888mm) of precipitation is accumulated.Snowfall
May through October are months without snowfall in Cheswold.Daylight
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 7:32 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:46 pm EDT.
Sunshine
In September, the average sunshine is 9.4h.UV index
The average daily maximum UV index in September in Cheswold is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The average daily UV index of 5 in September transforms into the following instructions:
Guard yourself - Precautionary measures against sun damage are advocated. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Prioritize a wide-brim hat for comprehensive sun defense for your face, neck, eyes, and ears.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in September
Cheswold, 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 (39.2°F).
- Average low temperature in September: 61.9°F
The month with the highest average low temperature is July (69.3°F).
The coldest month (with the lowest average low temperature) is January (27.9°F).
Average pressure in September
Cheswold, DE
- Average pressure in September: 30.05"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
Cheswold, DE
- Average wind speed in September: 6.7mph
The windiest months (with the highest average wind speed) are February and March (9.5mph).
The calmest month (with the lowest average wind speed) is August (6mph).
Average humidity in September
Cheswold, DE
- Average humidity in September: 78%
The month with the highest relative humidity is May (79%).
The month with the lowest relative humidity is April (73%).
Average rainfall in September
Cheswold, DE
- Average rainfall in September: 2.32"
The wettest month (with the highest rainfall) is August (3.86").
The driest month (with the least rainfall) is January (2.13").
Average rainfall days in September
Cheswold, DE
- Average rainfall days in September: 14.3 days
The month with the highest number of rainy days is July (19 days).
The month with the least rainy days is November (9.3 days).
Average snowfall in September
Cheswold, DE
- Average snowfall in September: 0"
The month with the highest snowfall is March (2.6").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in September
Cheswold, DE
- Average snowfall days in September: 0 days
The month with the highest number of snowfall days is January (4.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in September /
Average sunshine in September
Cheswold, DE
- Average daylight in September: 12h and 24min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 9h and 24min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in September
Cheswold, DE
- Average sunshine days in September: 13.4 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (9.5 days).
Average UV index in September
Cheswold, 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
Cheswold, DE
- Average cloud cover in September: 33
The months with the most cloud cover are February and March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in September
Cheswold, 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).
