September weather forecast
Grundys Corner, PA

Share

Weather in September

September, the first month of the autumn in Grundys Corner, is still a warm month, with an average temperature ranging between min 59.9°F (15.5°C) and max 76.5°F (24.7°C).

Temperature

A mild shift in the average high-temperature occurs in September, reducing from 83.1°F (28.4°C) in August to a still warm 76.5°F (24.7°C). Nighttime temperatures in September average to a refreshing 59.9°F (15.5°C) in Grundys Corner.

Humidity

In Grundys Corner, the average relative humidity in September is 76%.

Rainfall

In Grundys Corner, during September, the rain falls for 12.7 days and regularly aggregates up to 1.93" (49mm) of precipitation. In Grundys Corner, during the entire year, the rain falls for 154.4 days and collects up to 31.38" (797mm) of precipitation.

Snowfall

In Grundys Corner, snow does not fall in June through October.

Daylight

In September, the average length of the day is 12h and 26min.
On the first day of September, sunrise is at 6:27 am and sunset at 7:30 pm. On the last day of the month, sunrise is at 6:55 am and sunset at 6:43 pm EDT.

Sunshine

In September, the average sunshine is 8.8h.

UV index

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.
Note: In September, a regular UV index of 4 translates into these guidelines:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
Updated: Jul 19, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Grundys Corner in September?

Grundys Corner in September has an average high-temperature of 76.5°F (24.7°C) and an average low-temperature of 59.9°F (15.5°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is evaluated at 89.6°F (32°C).

What is the average humidity in September in Grundys Corner?

In Grundys Corner, the average relative humidity in September is 76%.

How much does it rain in September?

In Grundys Corner, in September, during 12.7 rainfall days, 1.93" (49mm) of precipitation is typically accumulated.

When it does not snow?

June through October are months without snowfall.

What is the average length of the day in September?

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

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:27 am and sunset at 7:30 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 Grundys Corner, the average sunshine duration in September is 8.8h.

What is the UV index intensity in September?

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium health risk 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
Grundys Corner, PA

Average temperature in September - Grundys Corner, PA
  • Average high temperature in September: 76.5°F

The warmest month (with the highest average high temperature) is July (85.5°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°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).

Average pressure in September
Grundys Corner, PA

Average pressure in September - Grundys Corner, PA
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in September
Grundys Corner, PA

Average wind speed in September - Grundys Corner, PA
  • Average wind speed in September: 6mph

The windiest month (with the highest average wind speed) is March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in September
Grundys Corner, PA

Average humidity in September - Grundys Corner, PA
  • Average humidity in September: 76%

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

Average rainfall in September
Grundys Corner, PA

Average rainfall in September - Grundys Corner, PA
  • Average rainfall in September: 1.93"

The wettest month (with the highest rainfall) is July (3.66").
The driest month (with the least rainfall) is January (1.89").

Average rainfall days in September
Grundys Corner, PA

Average rainfall days in September - Grundys Corner, PA
  • Average rainfall days in September: 12.7 days

The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is January (8 days).

Average snowfall in September
Grundys Corner, PA

Average snowfall in September - Grundys Corner, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is March (2.99").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in September
Grundys Corner, PA

Average snowfall days in September - Grundys Corner, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (4.8 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
Grundys Corner, PA

Average daylight in September / Average sunshine in September - Grundys Corner, 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 48min).

Average sunshine days in September
Grundys Corner, PA

Average sunshine days in September - Grundys Corner, PA
  • Average sunshine days in September: 14.9 days

The month with the most sunshine days is November (20.6 days).
The month with the least sunshine days is July (9.9 days).

Average UV index in September
Grundys Corner, PA

Average UV index in September - Grundys Corner, 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
Grundys Corner, PA

Average cloud cover in September - Grundys Corner, 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 32).

Average visibility in September
Grundys Corner, PA

Average visibility in September - Grundys Corner, 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).

Grundys Corner, Pennsylvania, USA

Weather forecast for your location

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