September weather forecast
La Trappe, PA

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Weather in September

The first month of the autumn, September, is still a warm month in La Trappe, Pennsylvania, with an average temperature fluctuating between 60.3°F (15.7°C) and 77°F (25°C).

Temperature

With the onset of September, La Trappe's average high-temperature slightly adjusts, moderately receding from August's 84.2°F (29°C) to a still warm 77°F (25°C). La Trappe, in the month of September, anticipates a consistent average low-temperature of 60.3°F (15.7°C).

Humidity

The average relative humidity in September is 74%.

Rainfall

In La Trappe, in September, during 12.8 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. Throughout the year, in La Trappe, there are 153.8 rainfall days, and 30.94" (786mm) of precipitation is accumulated.

Snowfall

June through October are months without snowfall.

Daylight

The average length of the day in September is 12h and 26min.
On the first day of the month, sunrise is at 6:28 am and sunset at 7:31 pm. On the last day of September, sunrise is at 6:55 am and sunset at 6:43 pm EDT.

Sunshine

In September, the average sunshine is 8.6h.

UV index

In September, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, the UV index of 5 transforms into the following advice:
Undertake protective steps - Recommendations to avoid sunburn are issued. Solar radiation peaks around mid-day, so it's wise to limit exposure to the Sun at this time. During bright days, sunglasses that offer UVA and UVB defense are recommended.
Updated: Jul 23, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the temperature in September?

In La Trappe, 77°F (25°C) is the average high-temperature and 60.3°F (15.7°C) is the average low-temperature during September. The average heat index (a.k.a. 'feels like', 'felt air temperature'), which combines relative humidity and air temperature, in August is appraised at 91.4°F (33°C).

What is the average humidity in September?

In La Trappe, Pennsylvania, the average relative humidity in September is 74%.

How much does it rain in September?

In La Trappe, Pennsylvania, in September, during 12.8 rainfall days, 2.01" (51mm) of precipitation is typically accumulated.

When it does not snow?

In La Trappe, snow does not fall in June through October.

What is the average length of the day in September?

The average day length in September is 12h and 26min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:28 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:43 pm EDT.

How long on average sun shines in September?

In La Trappe, the average sunshine duration in September is 8.6h.

How high is the UV index in September?

In La Trappe, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium health risk 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
La Trappe, PA

Average temperature in September - La Trappe, PA
  • Average high temperature in September: 77°F

The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (37.4°F).

  • Average low temperature in September: 60.3°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).

Average pressure in September
La Trappe, PA

Average pressure in September - La Trappe, 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 (29.93"Hg).

Average wind speed in September
La Trappe, PA

Average wind speed in September - La Trappe, PA
  • Average wind speed in September: 6mph

The windiest months (with the highest average wind speed) are March and April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

Average humidity in September
La Trappe, PA

Average humidity in September - La Trappe, PA
  • Average humidity in September: 74%

The months with the highest relative humidity are February and October (77%).
The months with the lowest relative humidity are April, July and August (71%).

Average rainfall in September
La Trappe, PA

Average rainfall in September - La Trappe, PA
  • Average rainfall in September: 2.01"

The wettest month (with the highest rainfall) is July (3.39").
The driest month (with the least rainfall) is January (1.89").

Average rainfall days in September
La Trappe, PA

Average rainfall days in September - La Trappe, PA
  • Average rainfall days in September: 12.8 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is November (7.5 days).

Average snowfall in September
La Trappe, PA

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

The month with the highest snowfall is March (2.76").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in September
La Trappe, PA

Average snowfall days in September - La Trappe, 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, September and October (0 days).

Average daylight in September /
Average sunshine in September
La Trappe, PA

Average daylight in September / Average sunshine in September - La 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 4min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

Average sunshine days in September
La Trappe, PA

Average sunshine days in September - La Trappe, PA
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is November (21.2 days).
The month with the least sunshine days is July (10.4 days).

Average UV index in September
La Trappe, PA

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

Average cloud cover in September
La Trappe, PA

Average cloud cover in September - La Trappe, PA
  • Average cloud cover in September: 39

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 33).

Average visibility in September
La Trappe, PA

Average visibility in September - La 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).

La Trappe, Pennsylvania, USA

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