September weather forecast
Keyser Valley, PA

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Weather in September

The first month of the autumn, September, is still a pleasant month in Keyser Valley, Pennsylvania, with an average temperature fluctuating between 51.1°F (10.6°C) and 71.2°F (21.8°C).

Temperature

The shift from August to September includes a minor decrease in the average high-temperature, lightly dropping from a moderately hot 77.9°F (25.5°C) to a pleasant 71.2°F (21.8°C). In September, Keyser Valley encounters an average low-temperature of 51.1°F (10.6°C) during the night.

Humidity

The average relative humidity in September in Keyser Valley is 80%.

Rainfall

September is the month with the least rainfall. Rain falls for 12.6 days and accumulates 2.01" (51mm) of precipitation.

Snowfall

In Keyser Valley, snow does not fall in June through September.

Daylight

The average length of the day in September is 12h and 28min.
On the first day of the month, sunrise is at 6:29 am and sunset at 7:35 pm. On the last day of September, sunrise is at 6:59 am and sunset at 6:45 pm EDT.

Sunshine

In September, the average sunshine is 8.5h.

UV index

The average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index of 3 during September leads to these instructions:
Safety measures are advised. Light-skinned individuals may experience burns in under half an hour. Avoiding the Sun during its peak radiation time around midday is a healthy practice. In the presence of strong sunlight, it's crucial to wear sunglasses that ward off UVA and UVB rays.
Updated: Aug 21, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are September temperatures?

Keyser Valley in September has an average high-temperature of 71.2°F (21.8°C) and an average low-temperature of 51.1°F (10.6°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in July is appraised at 84.2°F (29°C).

What is the average humidity in September in Keyser Valley?

In September, the average relative humidity is 80%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 12.6 days and accumulates 2.01" (51mm) of precipitation.

How much does it rain in September?

In September, in Keyser Valley, the rain falls for 12.6 days. Throughout September, 2.01" (51mm) of precipitation is accumulated.

When it does not snow?

June through September are months without snowfall.

Does it snow in September?

In Keyser Valley, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Keyser Valley have in September?

In September, the average day length is 12h and 28min.

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:29 am and sunset at 7:35 pm. On the last day of the month, sunrise is at 6:59 am and sunset at 6:45 pm EDT.

How many hours of sunshine does Keyser Valley have in September?

The average sunshine duration in September is 8.5h.

What is the UV index reading in September?

In Keyser Valley, the average daily maximum UV index in September is 3. A UV Index of 3 to 5 symbolizes 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
Keyser Valley, PA

Average temperature in September - Keyser Valley, PA
  • Average high temperature in September: 71.2°F

The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (29.8°F).

  • Average low temperature in September: 51.1°F

The month with the highest average low temperature is July (58.6°F).
The coldest month (with the lowest average low temperature) is January (18°F).

Average pressure in September
Keyser Valley, PA

Average pressure in September - Keyser Valley, PA
  • Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in September
Keyser Valley, PA

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

The windiest months (with the highest average wind speed) are January, February, March and April (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in September
Keyser Valley, PA

Average humidity in September - Keyser Valley, PA
  • Average humidity in September: 80%

The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is July (77%).

Average rainfall in September
Keyser Valley, PA

Average rainfall in September - Keyser Valley, PA
  • Average rainfall in September: 2.01"

The wettest month (with the highest rainfall) is July (3.15").
The driest month (with the least rainfall) is September (2.01").

Average rainfall days in September
Keyser Valley, PA

Average rainfall days in September - Keyser Valley, PA
  • Average rainfall days in September: 12.6 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (7.3 days).

Average snowfall in September
Keyser Valley, PA

Average snowfall in September - Keyser Valley, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is February (9.13").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Keyser Valley, PA

Average snowfall days in September - Keyser Valley, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (16.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Keyser Valley, PA

Average daylight in September / Average sunshine in September - Keyser Valley, PA
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in September: 8h and 3min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The months with the least sunshine are January and February (Average sunshine: 3h and 24min).

Average sunshine days in September
Keyser Valley, PA

Average sunshine days in September - Keyser Valley, PA
  • Average sunshine days in September: 15 days

The month with the most sunshine days is September (15 days).
The month with the least sunshine days is May (9.3 days).

Average UV index in September
Keyser Valley, PA

Average UV index in September - Keyser Valley, PA
  • Average UV index in September: 3

The months with the highest UV index are May, June, July and August (UV index 5).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in September
Keyser Valley, PA

Average cloud cover in September - Keyser Valley, PA
  • Average cloud cover in September: 44

The months with the most cloud cover are January, February and December (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 38).

Average visibility in September
Keyser Valley, PA

Average visibility in September - Keyser Valley, PA
  • Average visibility in September: 5mi

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

Keyser Valley, Pennsylvania, USA

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