September weather forecast
Harmonyville, PA

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Weather in September

The first month of the autumn, September, is still a warm month in Harmonyville, Pennsylvania, with an average temperature ranging between max 75°F (23.9°C) and min 56.5°F (13.6°C).

Temperature

With the onset of September, Harmonyville experiences a modest temperature adjustment, with the average high-temperature gently receding from 81.1°F (27.3°C) in August to a still moderately hot 75°F (23.9°C). September's average low-temperature reading settles at a refreshing 56.5°F (13.6°C).

Humidity

The average relative humidity in September in Harmonyville is 79%.

Rainfall

The month with the least rainfall is September, when the rain falls for 12.9 days and typically collects 1.77" (45mm) of precipitation.

Snowfall

June 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 6:31 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:46 pm EDT.

Sunshine

In September, the average sunshine is 8.9h.

UV index

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: An average UV index of 4 in September transforms into this advice:
Heed the precautions - Suggestions to avoid sunburn are made. UV radiation from the Sun is most dangerous during midday; take precautions and seek shade. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades.

Frequently asked questions

What are the temperatures in September?

September temperatures vary between a high-temperature of 75°F (23.9°C) and a low-temperature of 56.5°F (13.6°C). In August, the average heat index (a.k.a. 'felt air temperature', 'feels like'), which factors the actual air temperature with the relative humidity, is calculated to be 86°F (30°C).

What is the average humidity in September?

The average relative humidity in September is 79%.

What is the driest month?

The month with the least rainfall in Harmonyville is September, when the rain falls for 12.9 days and typically collects 1.77" (45mm) of precipitation.

How many days does it rain in September?

In Harmonyville, in September, during 12.9 rainfall days, 1.77" (45mm) of precipitation is typically accumulated.

When it does not snow?

June through September are months without snowfall.

Does it snow in September?

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

How many hours of daylight does Harmonyville have in September?

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

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:31 am and sunset at 7:34 pm. On the last day of the month, sunrise is at 6:58 am and sunset at 6:46 pm EDT.

How many hours of sunshine does Harmonyville have in September?

The average sunshine duration in September is 8.9h.

How high is the UV index in September?

In September, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate vulnerability 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
Harmonyville, PA

Average temperature in September - Harmonyville, PA
  • Average high temperature in September: 75°F

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in September: 56.5°F

The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).

Average pressure in September
Harmonyville, PA

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

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed in September
Harmonyville, PA

Average wind speed in September - Harmonyville, PA
  • Average wind speed in September: 5.4mph

The windiest months (with the highest average wind speed) are January and March (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in September
Harmonyville, PA

Average humidity in September - Harmonyville, PA
  • Average humidity in September: 79%

The months with the highest relative humidity are February and October (81%).
The month with the lowest relative humidity is April (76%).

Average rainfall in September
Harmonyville, PA

Average rainfall in September - Harmonyville, PA
  • Average rainfall in September: 1.77"

The wettest month (with the highest rainfall) is August (2.83").
The driest month (with the least rainfall) is September (1.77").

Average rainfall days in September
Harmonyville, PA

Average rainfall days in September - Harmonyville, PA
  • Average rainfall days in September: 12.9 days

The month with the highest number of rainy days is May (17.4 days).
The month with the least rainy days is January (9.4 days).

Average snowfall in September
Harmonyville, PA

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

The month with the highest snowfall is March (3.03").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Harmonyville, PA

Average snowfall days in September - Harmonyville, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (7.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Harmonyville, 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 42min).

Average sunshine days in September
Harmonyville, PA

Average sunshine days in September - Harmonyville, PA
  • Average sunshine days in September: 15.2 days

The month with the most sunshine days is November (17.8 days).
The month with the least sunshine days is May (11.6 days).

Average UV index in September
Harmonyville, PA

Average UV index in September - Harmonyville, PA
  • Average UV index in September: 4

The months with the highest UV index are May, June and July (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
Harmonyville, PA

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

The months with the most cloud cover are February and December (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 31).

Average visibility in September
Harmonyville, PA

Average visibility in September - Harmonyville, PA
  • Average visibility in September: 5mi

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

Harmonyville, Pennsylvania, USA

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