September weather forecast
Havertown, PA

Share

Weather in September

September, the first month of the autumn in Havertown, is also a moderately hot month, with temperature in the range of an average high of 76.5°F (24.7°C) and an average low of 59.9°F (15.5°C).

Temperature

The beginning of September brings a slight decrease in the average high-temperature, transitioning from a warm 83.7°F (28.7°C) in August to a still moderately hot 76.5°F (24.7°C). Havertown's nights in September experience an average temperature drop to a mild 59.9°F (15.5°C).

Humidity

In Havertown, the average relative humidity in September is 75%.

Rainfall

In September, the rain falls for 10.1 days. Throughout September, 0.63" (16mm) of precipitation is accumulated. In Havertown, during the entire year, the rain falls for 111.8 days and collects up to 9.69" (246mm) of precipitation.

Snowfall

In Havertown, snow does not fall in April through October.

Daylight

In Havertown, 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 Havertown, the average sunshine in September is 8.6h.

UV index

In September, the average daily maximum UV index is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum daily UV index, 5 in September, converts into the following recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage.

Frequently asked questions

What are the temperatures in September?

The average high-temperature, in September, in Havertown, is 76.5°F (24.7°C), while the average low-temperature is 59.9°F (15.5°C). In August, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which factors the actual air temperature with the relative humidity, is appraised at 89.6°F (32°C).

What is the average humidity in September?

In September, the average relative humidity is 75%.

How many days does it rain in September in Havertown?

In September, the rain falls for 10.1 days. Throughout September, 0.63" (16mm) of precipitation is accumulated.

When it does not snow?

In Havertown, snow does not fall in April through October.

How many hours of daylight does Havertown have in September?

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

What time are sunrise and sunset in September?

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

How many hours of sunshine does Havertown have in September?

In Havertown, the average sunshine duration in September is 8.6h.

What is the UV index intensity in September?

The average daily maximum UV index in September in Havertown is 5. 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
Havertown, PA

Average temperature in September - Havertown, PA
  • Average high temperature in September: 76.5°F

The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in September: 59.9°F

The month with the highest average low temperature is July (68.9°F).
The coldest month (with the lowest average low temperature) is January (25°F).

Average pressure in September
Havertown, PA

Average pressure in September - Havertown, 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
Havertown, PA

Average wind speed in September - Havertown, PA
  • Average wind speed in September: 5.9mph

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

Average humidity in September
Havertown, PA

Average humidity in September - Havertown, PA
  • Average humidity in September: 75%

The months with the highest relative humidity are February and October (78%).
The months with the lowest relative humidity are April, July and August (71%).

Average rainfall in September
Havertown, PA

Average rainfall in September - Havertown, PA
  • Average rainfall in September: 0.63"

The wettest months (with the highest rainfall) are July and August (1.14").
The driest month (with the least rainfall) is January (0.55").

Average rainfall days in September
Havertown, PA

Average rainfall days in September - Havertown, PA
  • Average rainfall days in September: 10.1 days

The month with the highest number of rainy days is July (13.3 days).
The month with the least rainy days is January (5.3 days).

Average snowfall in September
Havertown, PA

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

The months with the highest snowfall are February and March (0.98").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in September
Havertown, PA

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

The month with the highest number of snowfall days is January (4.5 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in September / Average sunshine in September - Havertown, 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 4min

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 36min).

Average sunshine days in September
Havertown, PA

Average sunshine days in September - Havertown, PA
  • Average sunshine days in September: 18.5 days

The month with the most sunshine days is November (22.5 days).
The month with the least sunshine days is July (14.9 days).

Average UV index in September
Havertown, PA

Average UV index in September - Havertown, PA
  • Average UV index in September: 5

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, November and December (UV index 2).

Average cloud cover in September
Havertown, PA

Average cloud cover in September - Havertown, PA
  • Average cloud cover in September: 39

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in September
Havertown, PA

Average visibility in September - Havertown, PA
  • Average visibility in September: 6mi

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

Havertown, Pennsylvania, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location