September weather forecast
Kennett Square, PA

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Weather in September

The first month of the autumn, September, is still a warm month in Kennett Square, Pennsylvania, with an average temperature varying between 59.4°F (15.2°C) and 75.7°F (24.3°C).

Temperature

September brings a slight decrease in temperature, down from 82.4°F (28°C) in August to a still warm 75.7°F (24.3°C). Kennett Square records a consistent low-temperature of 59.4°F (15.2°C) during September nights.

Humidity

In Kennett Square, Pennsylvania, the average relative humidity in September is 78%.

Rainfall

In Kennett Square, in September, it is raining for 11.2 days, with typically 1.1" (28mm) of accumulated precipitation. In Kennett Square, during the entire year, the rain falls for 135 days and collects up to 17.76" (451mm) of precipitation.

Snowfall

In Kennett Square, snow does not fall in June through October.

Daylight

In Kennett Square, the average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 6:31 am and sunset at 7:33 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 8.9h.

UV index

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily high UV index of 4 in September leads to these guidelines:
Exercise care. People with light skin might get burns in fewer than 30 minutes. To guard against the harmful effects of the Sun, minimize exposure during midday. Stay sun-safe with clothing that is both closely woven and worn loosely.

Frequently asked questions

What are the temperatures in Kennett Square in September?

The high-temperature, in September, in Kennett Square, records 75.7°F (24.3°C), while the low-temperature is 59.4°F (15.2°C). In August, the average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, is estimated at 89.6°F (32°C).

What is the average humidity in September?

In Kennett Square, the average relative humidity in September is 78%.

How many days does it rain in September?

In September, the rain falls for 11.2 days. Throughout September, 1.1" (28mm) of precipitation is accumulated.

When it does not snow?

In Kennett Square, snow does not fall in June through October.

What is the average length of the day in September?

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

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:31 am and sunset at 7:33 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:46 pm EDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.9h.

What is the UV index reading in September?

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability from unsafe 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
Kennett Square, PA

Average temperature in September - Kennett Square, PA
  • Average high temperature in September: 75.7°F

The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in September: 59.4°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (24.8°F).

Average pressure in September
Kennett Square, PA

Average pressure in September - Kennett Square, PA
  • Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in September
Kennett Square, PA

Average wind speed in September - Kennett Square, 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 months (with the lowest average wind speed) are July and August (5.3mph).

Average humidity in September
Kennett Square, PA

Average humidity in September - Kennett Square, PA
  • Average humidity in September: 78%

The month with the highest relative humidity is October (79%).
The month with the lowest relative humidity is April (74%).

Average rainfall in September
Kennett Square, PA

Average rainfall in September - Kennett Square, PA
  • Average rainfall in September: 1.1"

The wettest month (with the highest rainfall) is August (2.36").
The driest month (with the least rainfall) is November (1.06").

Average rainfall days in September
Kennett Square, PA

Average rainfall days in September - Kennett Square, PA
  • Average rainfall days in September: 11.2 days

The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is January (6.6 days).

Average snowfall in September
Kennett Square, PA

Average snowfall in September - Kennett Square, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is March (1.5").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in September
Kennett Square, PA

Average snowfall days in September - Kennett Square, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (5.2 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Kennett Square, PA

Average daylight in September / Average sunshine in September - Kennett Square, 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 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in September
Kennett Square, PA

Average sunshine days in September - Kennett Square, PA
  • Average sunshine days in September: 16.7 days

The month with the most sunshine days is November (21 days).
The month with the least sunshine days is July (12.8 days).

Average UV index in September
Kennett Square, PA

Average UV index in September - Kennett Square, 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
Kennett Square, PA

Average cloud cover in September - Kennett Square, PA
  • Average cloud cover in September: 38

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

Average visibility in September
Kennett Square, PA

Average visibility in September - Kennett Square, PA
  • Average visibility in September: 5mi

The months with the highest visibility are January, February, March, April, June, July, August, October, November and December (6mi).
The months with the lowest visibility are May and September (5mi).

Kennett Square, Pennsylvania, USA

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