September weather forecast
Jennersville, PA

Share

Weather in September

September, the first month of the autumn in Jennersville, is still a warm month, with temperature in the range of an average low of 58.8°F (14.9°C) and an average high of 75°F (23.9°C).

Temperature

Transitioning from August to September involves a subtle drop in average high-temperatures, descending from a moderately hot 81.9°F (27.7°C) to a still warm 75°F (23.9°C). In Jennersville, September is marked by an average low-temperature of 58.8°F (14.9°C).

Humidity

February, May, September, October and December, with an average relative humidity of 79%, are the most humid months in Jennersville.

Rainfall

The months with the least rainfall are January, September and November Rain falls for 10.8 days and accumulates 0.87" (22mm) of rain.

Snowfall

In Jennersville, snow does not fall in June through October.

Daylight

In Jennersville, the average length of the day in September is 12h and 26min.
On the first day of September in Jennersville, sunrise is at 6:32 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:47 pm EDT.

Sunshine

In September, the average sunshine is 8.9h.

UV index

In Jennersville, Pennsylvania, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 4 translates into these guidelines:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation.

Frequently asked questions

What is the average September temperature?

During September, Jennersville experiences an average high-temperature of 75°F (23.9°C) and a low-temperature of 58.8°F (14.9°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is calculated to be 87.8°F (31°C).

What are the most humid months?

February, May, September, October and December, with an average relative humidity of 79%, are most humid months.

What is the average humidity in September?

In September, the average relative humidity is 79%.

What is the driest month?

January, September and November are months with the least rain when the rain falls for 10.8 days and typically aggregates up to 0.87" (22mm) of rain.

How much does it rain in September?

In Jennersville, during September, the rain falls for 10.8 days and regularly aggregates up to 0.87" (22mm) of precipitation.

When it does not snow?

June through October are months without snowfall.

What is the average length of the day in September?

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

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:32 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:47 pm EDT.

How many hours of sunshine does Jennersville have in September?

In September, the average sunshine duration is 8.9h.

What is the UV index intensity in September?

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability from unprotected exposure to UV radiation.
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
Jennersville, PA

Average temperature in September - Jennersville, PA
  • Average high temperature in September: 75°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (36.9°F).

  • Average low temperature in September: 58.8°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (24.6°F).

Average pressure in September
Jennersville, PA

Average pressure in September - Jennersville, 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
Jennersville, PA

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

The windiest months (with the highest average wind speed) are February and March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in September
Jennersville, PA

Average humidity in September - Jennersville, PA
  • Average humidity in September: 79%

The months with the highest relative humidity are February, May, September, October and December (79%).
The months with the lowest relative humidity are March and April (75%).

Average rainfall in September
Jennersville, PA

Average rainfall in September - Jennersville, PA
  • Average rainfall in September: 0.87"

The wettest month (with the highest rainfall) is August (1.93").
The driest months (with the least rainfall) are January, September and November (0.87").

Average rainfall days in September
Jennersville, PA

Average rainfall days in September - Jennersville, PA
  • Average rainfall days in September: 10.8 days

The month with the highest number of rainy days is July (14.9 days).
The month with the least rainy days is January (5.9 days).

Average snowfall in September
Jennersville, PA

Average snowfall in September - Jennersville, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is March (1.26").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in September
Jennersville, PA

Average snowfall days in September - Jennersville, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (5.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Jennersville, PA

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

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 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
Jennersville, PA

Average sunshine days in September - Jennersville, PA
  • Average sunshine days in September: 17.6 days

The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is July (12.9 days).

Average UV index in September
Jennersville, PA

Average UV index in September - Jennersville, 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
Jennersville, PA

Average cloud cover in September - Jennersville, 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 30).

Average visibility in September
Jennersville, PA

Average visibility in September - Jennersville, PA
  • Average visibility in September: 6mi

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

Jennersville, Pennsylvania, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location