September weather forecast
Chadds Ford, PA

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Weather in September

September, the first month of the autumn in Chadds Ford, is still a warm month, with an average temperature ranging between min 59.9°F (15.5°C) and max 76.3°F (24.6°C).

Temperature

Chadds Ford's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's moderately hot 82.9°F (28.3°C) to a still warm 76.3°F (24.6°C). The nighttime temperature in Chadds Ford, during September, averages of 59.9°F (15.5°C).

Humidity

In September, the average relative humidity is 77%.

Rainfall

In Chadds Ford, in September, during 13.3 rainfall days, 2.4" (61mm) of precipitation is typically accumulated. In Chadds Ford, Pennsylvania, during the entire year, the rain falls for 168.9 days and collects up to 35.55" (903mm) of precipitation.

Snowfall

In Chadds Ford, snow does not fall in June through September.

Daylight

In Chadds Ford, the average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:30 am and sunset at 7:33 pm. On the last day of September, sunrise is at 6:58 am and sunset at 6:45 pm EDT.

Sunshine

In September, the average sunshine is 8.8h.

UV index

The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Act with care - The need to guard against sun damage is communicated. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.

Frequently asked questions

What is the average September temperature?

The high-temperature, in September, in Chadds Ford, is 76.3°F (24.6°C), while the low-temperature averages to 59.9°F (15.5°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is calculated to be 89.6°F (32°C).

What is the average humidity in September?

In September, the average relative humidity in Chadds Ford, Pennsylvania, is 77%.

How much does it rain in September?

In Chadds Ford, in September, during 13.3 rainfall days, 2.4" (61mm) of precipitation is typically accumulated.

When it does not snow?

June through September are months without snowfall.

Does it snow in September?

In Chadds Ford, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September?

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

What time are sunrise and sunset in September in Chadds Ford?

In September, on the first day of the month, sunrise is at 6:30 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:45 pm EDT.

How many hours of sunshine does Chadds Ford have in September?

In Chadds Ford, the average sunshine duration in September is 8.8h.

What is the UV index reading in September?

The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to Sun's UV rays.
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
Chadds Ford, PA

Average temperature in September - Chadds Ford, PA
  • Average high temperature in September: 76.3°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in September: 59.9°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).

Average pressure in September
Chadds Ford, PA

Average pressure in September - Chadds Ford, PA
  • 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
Chadds Ford, PA

Average wind speed in September - Chadds Ford, PA
  • Average wind speed in September: 5.8mph

The windiest months (with the highest average wind speed) are January, February and March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in September
Chadds Ford, PA

Average humidity in September - Chadds Ford, PA
  • Average humidity in September: 77%

The month with the highest relative humidity is October (78%).
The month with the lowest relative humidity is April (72%).

Average rainfall in September
Chadds Ford, PA

Average rainfall in September - Chadds Ford, PA
  • Average rainfall in September: 2.4"

The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (2.36").

Average rainfall days in September
Chadds Ford, PA

Average rainfall days in September - Chadds Ford, PA
  • Average rainfall days in September: 13.3 days

The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is November (8.8 days).

Average snowfall in September
Chadds Ford, PA

Average snowfall in September - Chadds Ford, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is March (3.58").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Chadds Ford, PA

Average snowfall days in September - Chadds Ford, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Chadds Ford, PA

Average daylight in September / Average sunshine in September - Chadds Ford, PA
  • Average daylight in September: 12h and 2min

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

Average sunshine days in September
Chadds Ford, PA

Average sunshine days in September - Chadds Ford, PA
  • Average sunshine days in September: 14.2 days

The month with the most sunshine days is November (18.6 days).
The months with the least sunshine days are May and July (9.8 days).

Average UV index in September
Chadds Ford, PA

Average UV index in September - Chadds Ford, PA
  • Average UV index in September: 4

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, February, November and December (UV index 2).

Average cloud cover in September
Chadds Ford, PA

Average cloud cover in September - Chadds Ford, PA
  • Average cloud cover in September: 37

The months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in September
Chadds Ford, PA

Average visibility in September - Chadds Ford, PA
  • 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).

Chadds Ford, Pennsylvania, USA

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