September weather forecast
Conshohocken, PA

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Weather in September

September, the first month of the autumn in Conshohocken, is also a moderately hot month, with an average temperature fluctuating between 59°F (15°C) and 76.1°F (24.5°C).

Temperature

With the onset of September, Conshohocken's climate undergoes a slight change as the average high-temperature moves from a moderately hot 83.3°F (28.5°C) in August to a still warm 76.1°F (24.5°C). Conshohocken's average low-temperature during September nights is observed to be a mild 59°F (15°C).

Humidity

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

Rainfall

In Conshohocken, in September, during 10.8 rainfall days, 0.98" (25mm) of precipitation is typically accumulated. Throughout the year, there are 138.2 rainfall days, and 15.59" (396mm) of precipitation is accumulated.

Snowfall

April, June through November are months without snowfall.

Daylight

In Conshohocken, the average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 6:29 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:44 pm EDT.

Sunshine

In September, the average sunshine is 8.8h.

UV index

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for average individuals.
Note: A daily high UV index of 4 in September leads to these guidelines:
Preventative actions are necessary - Suggestions to safeguard against sun damage are in order. Given the potency of the midday Sun's UV radiation, one should avoid prolonged exposure. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat.

Frequently asked questions

What is the average September temperature in Conshohocken?

The high-temperature during September is 76.1°F (24.5°C) and the low-temperature is 59°F (15°C). The average heat index (a.k.a. 'apparent temperature', 'feels like'), which takes the relative humidity and factors it into the air temperature reading, in August is computed to be 89.6°F (32°C).

What is the average humidity in September?

In September, the average relative humidity is 76%.

How many days does it rain in September?

In Conshohocken, during September, the rain falls for 10.8 days and regularly aggregates up to 0.98" (25mm) of precipitation.

When it does not snow?

April, June through November are months without snowfall.

How many hours of daylight does Conshohocken have in September?

In Conshohocken, Pennsylvania, the average day length in September is 12h and 26min.

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:29 am and sunset at 7:32 pm. On the last day of the month, sunrise is at 6:57 am and sunset at 6:44 pm EDT.

How long on average sun shines in September?

In September, the average sunshine duration is 8.8h.

What is the UV index reading in September?

The average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a moderate vulnerability 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
Conshohocken, PA

Average temperature in September - Conshohocken, PA
  • Average high temperature in September: 76.1°F

The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in September: 59°F

The month with the highest average low temperature is July (67.5°F).
The coldest month (with the lowest average low temperature) is January (24.3°F).

Average pressure in September
Conshohocken, PA

Average pressure in September - Conshohocken, PA
  • Average pressure in September: 30.06"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
Conshohocken, PA

Average wind speed in September - Conshohocken, PA
  • Average wind speed in September: 5.7mph

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.3mph).

Average humidity in September
Conshohocken, PA

Average humidity in September - Conshohocken, PA
  • Average humidity in September: 76%

The months with the highest relative humidity are February and October (79%).
The months with the lowest relative humidity are April and July (72%).

Average rainfall in September
Conshohocken, PA

Average rainfall in September - Conshohocken, PA
  • Average rainfall in September: 0.98"

The wettest month (with the highest rainfall) is July (1.89").
The driest month (with the least rainfall) is February (0.91").

Average rainfall days in September
Conshohocken, PA

Average rainfall days in September - Conshohocken, PA
  • Average rainfall days in September: 10.8 days

The month with the highest number of rainy days is May (16 days).
The month with the least rainy days is November (7.4 days).

Average snowfall in September
Conshohocken, PA

Average snowfall in September - Conshohocken, PA
  • Average snowfall in September: 0"

The months with the highest snowfall are February and March (0.55").
The months with the least snowfall are April, June, July, August, September, October and November (0").

Average snowfall days in September
Conshohocken, PA

Average snowfall days in September - Conshohocken, 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 April, June, July, August, September and October (0 days).

Average daylight in September /
Average sunshine in September
Conshohocken, PA

Average daylight in September / Average sunshine in September - Conshohocken, 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 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in September
Conshohocken, PA

Average sunshine days in September - Conshohocken, PA
  • Average sunshine days in September: 17.3 days

The month with the most sunshine days is November (20.5 days).
The months with the least sunshine days are May and June (12.8 days).

Average UV index in September
Conshohocken, PA

Average UV index in September - Conshohocken, 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, March, November and December (UV index 2).

Average cloud cover in September
Conshohocken, PA

Average cloud cover in September - Conshohocken, PA
  • Average cloud cover in September: 38

The month with the most cloud cover is February (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in September
Conshohocken, PA

Average visibility in September - Conshohocken, 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).

Conshohocken, Pennsylvania, USA

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