September weather forecast
Mount Washington, PA

Weather in September

The first month of the autumn, September, is also a moderately hot month in Mount Washington, Pennsylvania, with temperature in the range of an average high of 75.7°F (24.3°C) and an average low of 55.9°F (13.3°C).

Temperature

In Mount Washington, the average high-temperature in September slightly decreases from a moderately hot 82.2°F (27.9°C) in August to a still warm 75.7°F (24.3°C). In Mount Washington, the average low-temperature is 55.9°F (13.3°C).

Humidity

In September, the average relative humidity in Mount Washington is 76%.

Rainfall

In Mount Washington, in September, it is raining for 12.9 days, with typically 2.13" (54mm) of accumulated precipitation. In Mount Washington, during the entire year, the rain falls for 163.6 days and collects up to 26.93" (684mm) of precipitation.

Snowfall

May through September are months without snowfall.

Daylight

In September, the average length of the day is 12h and 27min.
On the first day of September, sunrise is at 6:47 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 7:15 am and sunset at 7:04 pm EDT.

Sunshine

In Mount Washington, the average sunshine in September is 8.2h.

UV index

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against sunburn is recommended. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in Mount Washington?

In Mount Washington, Pennsylvania, in September, the average high-temperature is 75.7°F (24.3°C), and the average low-temperature is 55.9°F (13.3°C). in August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines relative humidity and air temperature, is estimated at 87.8°F (31°C).

What is the average humidity in September in Mount Washington?

The average relative humidity in September in Mount Washington is 76%.

How many days does it rain in September in Mount Washington?

In September, the rain falls for 12.9 days. Throughout September, 2.13" (54mm) of precipitation is accumulated.

When it does not snow in Mount Washington?

In Mount Washington, Pennsylvania, snow does not fall in May through September.

Does it snow in Mount Washington in September?

In Mount Washington, in September, it doesn't snow. In October, it regularly snows.

How many hours of daylight does Mount Washington have in September?

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

What time are sunrise and sunset in September in Mount Washington?

In September, on the first day of the month, sunrise is at 6:47 am and sunset at 7:52 pm. On the last day of the month, in Mount Washington, Pennsylvania, sunrise is at 7:15 am and sunset at 7:04 pm EDT.

How many hours of sunshine does Mount Washington have in September?

In September, the average sunshine duration in Mount Washington is 8.2h.

How high is the UV index in September in Mount Washington?

In September, the average daily maximum UV index in Mount Washington, Pennsylvania, is 4. A UV Index of 3 to 5 symbolizes a moderate vulnerability from exposure to the Sun's UV radiation.
Average humidity
Average rainfall days
Average snowfall
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in September
Mount Washington, PA

Average temperature in September - Mount Washington, PA
  • Average high temperature in September: 75.7°F

The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (33.1°F).

  • Average low temperature in September: 55.9°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (21°F).

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Average pressure in September
Mount Washington, PA

Average pressure in September - Mount Washington, PA
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed in September
Mount Washington, PA

Average wind speed in September - Mount Washington, PA
  • Average wind speed in September: 5.2mph

The windiest month (with the highest average wind speed) is January (8mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

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Average humidity in September
Mount Washington, PA

Average humidity in September - Mount Washington, PA
  • Average humidity in September: 76%

The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are July and August (73%).

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Average rainfall in September
Mount Washington, PA

Average rainfall in September - Mount Washington, PA
  • Average rainfall in September: 2.13"

The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is November (1.54").

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Average rainfall days in September
Mount Washington, PA

Average rainfall days in September - Mount Washington, PA
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is May (18.9 days).
The month with the least rainy days is January (8.9 days).

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Average snowfall in September
Mount Washington, PA

Average snowfall in September - Mount Washington, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (3.31").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in September
Mount Washington, PA

Average snowfall days in September - Mount Washington, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (14.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Mount Washington, PA

Average daylight in September / Average sunshine in September - Mount Washington, PA
  • Average daylight in September: 12h and 27min

The month with the longest days is June (Average daylight: 15h and 1min).
The month with the shortest days is December (Average daylight: 9h and 20min).

  • Average sunshine in September: 8h and 12min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).

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Average sunshine days in September
Mount Washington, PA

Average sunshine days in September - Mount Washington, PA
  • Average sunshine days in September: 13.8 days

The month with the most sunshine days is November (16.5 days).
The month with the least sunshine days is February (9.6 days).

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Average UV index in September
Mount Washington, PA

Average UV index in September - Mount Washington, PA
  • Average UV index in September: 4

The months with the highest UV index are May, June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in September
Mount Washington, PA

Average cloud cover in September - Mount Washington, PA
  • Average cloud cover in September: 40

The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 34).

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Average visibility in September
Mount Washington, PA

Average visibility in September - Mount Washington, PA
  • Average visibility in September: 5mi

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

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