September weather forecast
West Middlesex, PA

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Weather in September

September, the first month of the autumn in West Middlesex, is still a warm month, with an average temperature ranging between min 53.8°F (12.1°C) and max 73.4°F (23°C).

Temperature

September's onset brings a negligible change in high-temperatures, falling from a warm 79.3°F (26.3°C) in August to a still moderately hot 73.4°F (23°C). West Middlesex's average low-temperature during September nights is observed to be a fresh 53.8°F (12.1°C).

Humidity

In September, the average relative humidity is 80%.

Rainfall

September is the month with the least rainfall. Rain falls for 15.5 days and accumulates 2.2" (56mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in September is 12h and 28min.
On the first day of September, sunrise is at 6:49 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:04 pm EDT.

Sunshine

The average sunshine in September is 8.3h.

UV index

In West Middlesex, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: In September, the UV index of 4 transforms into the following advice:
Undertake precautions - Guarding against sun damage is counselled. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. To cut down UV radiation exposure by about half, sport a wide-brim hat.

Frequently asked questions

What are September temperatures?

The high-temperature during September is 73.4°F (23°C) and the low-temperature is 53.8°F (12.1°C). In July, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which combines relative humidity and air temperature, is evaluated at 86°F (30°C).

What is the average humidity in September?

In West Middlesex, the average relative humidity in September is 80%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 15.5 days and typically collects 2.2" (56mm) of precipitation.

How many days does it rain in September?

In West Middlesex, during September, the rain falls for 15.5 days and regularly aggregates up to 2.2" (56mm) of precipitation.

When it does not snow?

In West Middlesex, snow does not fall in June through September.

Does it snow in September?

In West Middlesex, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in West Middlesex?

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

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:49 am and sunset at 7:54 pm. On the last day of the month, sunrise is at 7:18 am and sunset at 7:04 pm EDT.

How many hours of sunshine does West Middlesex have in September?

In West Middlesex, Pennsylvania, the average sunshine duration in September is 8.3h.

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 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
West Middlesex, PA

Average temperature in September - West Middlesex, PA
  • Average high temperature in September: 73.4°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (31.1°F).

  • Average low temperature in September: 53.8°F

The month with the highest average low temperature is July (60.6°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).

Average pressure in September
West Middlesex, PA

Average pressure in September - West Middlesex, 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 (29.94"Hg).

Average wind speed in September
West Middlesex, PA

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

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

Average humidity in September
West Middlesex, PA

Average humidity in September - West Middlesex, PA
  • Average humidity in September: 80%

The month with the highest relative humidity is February (88%).
The months with the lowest relative humidity are May, July and August (78%).

Average rainfall in September
West Middlesex, PA

Average rainfall in September - West Middlesex, PA
  • Average rainfall in September: 2.2"

The wettest month (with the highest rainfall) is June (3.66").
The driest month (with the least rainfall) is September (2.2").

Average rainfall days in September
West Middlesex, PA

Average rainfall days in September - West Middlesex, PA
  • Average rainfall days in September: 15.5 days

The month with the highest number of rainy days is May (19.5 days).
The month with the least rainy days is January (9.3 days).

Average snowfall in September
West Middlesex, PA

Average snowfall in September - West Middlesex, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is January (8.62").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
West Middlesex, PA

Average snowfall days in September - West Middlesex, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (20.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
West Middlesex, PA

Average daylight in September / Average sunshine in September - West Middlesex, 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 18min).

  • Average sunshine in September: 8h and 2min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).

Average sunshine days in September
West Middlesex, PA

Average sunshine days in September - West Middlesex, PA
  • Average sunshine days in September: 12.7 days

The month with the most sunshine days is September (12.7 days).
The month with the least sunshine days is February (6 days).

Average UV index in September
West Middlesex, PA

Average UV index in September - West Middlesex, PA
  • Average UV index in September: 4

The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is December (UV index 1).

Average cloud cover in September
West Middlesex, PA

Average cloud cover in September - West Middlesex, PA
  • Average cloud cover in September: 40

The month with the most cloud cover is January (Cloud cover 74).
The months with the least cloud cover are July and August (Cloud cover 35).

Average visibility in September
West Middlesex, PA

Average visibility in September - West Middlesex, PA
  • Average visibility in September: 5mi

The months with the highest visibility are March, April, May, June, July, August, September, October and November (5mi).
The months with the lowest visibility are January, February and December (4mi).

West Middlesex, Pennsylvania, USA

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