September weather forecast
Trappe, PA

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Weather in September

September, the first month of the autumn in Trappe, is still a warm month, with an average temperature ranging between min 57.2°F (14°C) and max 75.2°F (24°C).

Temperature

September witnesses a gentle descent in average high-temperature, descending from August's 81.9°F (27.7°C) to a still warm 75.2°F (24°C). Throughout September, Trappe witnesses a consistent average low-temperature of 57.2°F (14°C).

Humidity

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

Rainfall

September is the month with the least rainfall. Rain falls for 12.3 days and accumulates 1.81" (46mm) of precipitation.

Snowfall

In Trappe, snow does not fall in May through October.

Daylight

The average length of the day in September is 12h and 27min.
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 6:57 am and sunset at 6:45 pm EDT.

Sunshine

The average sunshine in September is 8.8h.

UV index

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.
Note: The daily high UV index of 4 in September translates into this advice:
Exercise prevention - Precautions against solar damage are endorsed. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Updated: Jul 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature?

The average high-temperature, in September, in Trappe, is 75.2°F (24°C), while the average low-temperature is 57.2°F (14°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, in August is calculated to be 87.8°F (31°C).

What is the average humidity in September?

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

What is the driest month?

September is the month with the least rainfall in Trappe. Rain falls for 12.3 days and accumulates 1.81" (46mm) of precipitation.

How many days does it rain in September?

In Trappe, during September, the rain falls for 12.3 days and regularly aggregates up to 1.81" (46mm) of precipitation.

When it does not snow?

May through October are months without snowfall.

How many hours of daylight does Trappe have in September?

In September, the average day length is 12h and 27min.

When is the sunrise / sunset in September in Trappe?

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 6:57 am and sunset at 6:45 pm EDT.

How many hours of sunshine does Trappe have in September?

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

What is the UV index intensity in September?

In Trappe, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health risk from exposure to the Sun's 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
Trappe, PA

Average temperature in September - Trappe, PA
  • Average high temperature in September: 75.2°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 (35.4°F).

  • Average low temperature in September: 57.2°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).

Average pressure in September
Trappe, PA

Average pressure in September - Trappe, PA
  • Average pressure in September: 30.06"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
Trappe, PA

Average wind speed in September - Trappe, PA
  • Average wind speed in September: 5.5mph

The windiest month (with the highest average wind speed) is March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in September
Trappe, PA

Average humidity in September - Trappe, PA
  • Average humidity in September: 78%

The months with the highest relative humidity are February and October (80%).
The months with the lowest relative humidity are April and July (75%).

Average rainfall in September
Trappe, PA

Average rainfall in September - Trappe, PA
  • Average rainfall in September: 1.81"

The wettest month (with the highest rainfall) is August (3.15").
The driest month (with the least rainfall) is September (1.81").

Average rainfall days in September
Trappe, PA

Average rainfall days in September - Trappe, PA
  • Average rainfall days in September: 12.3 days

The months with the highest number of rainy days are May and July (17 days).
The month with the least rainy days is January (7.3 days).

Average snowfall in September
Trappe, PA

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

The month with the highest snowfall is March (3.7").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Trappe, PA

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

The month with the highest number of snowfall days is January (5.8 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
Trappe, PA

Average daylight in September / Average sunshine in September - Trappe, 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 42min).

Average sunshine days in September
Trappe, PA

Average sunshine days in September - Trappe, PA
  • Average sunshine days in September: 16.4 days

The month with the most sunshine days is November (21 days).
The month with the least sunshine days is May (12.3 days).

Average UV index in September
Trappe, PA

Average UV index in September - Trappe, 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, March, November and December (UV index 2).

Average cloud cover in September
Trappe, PA

Average cloud cover in September - Trappe, PA
  • Average cloud cover in September: 38

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in September
Trappe, PA

Average visibility in September - Trappe, 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).

Trappe, Pennsylvania, USA

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