September weather forecast
Clifton Heights, PA

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Clifton Heights, Pennsylvania, with temperature in the range of an average low of 60.8°F (16°C) and an average high of 76.6°F (24.8°C).

Temperature

Clifton Heights's weather in September involves a mild decrease in the average high-temperature, moving down slightly from August's 83.7°F (28.7°C) to a still warm 76.6°F (24.8°C). Nighttime temperatures consistently average an enjoyable 60.8°F (16°C) during September.

Humidity

The average relative humidity in September is 76%.

Rainfall

In Clifton Heights, in September, during 12.3 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, there are 142 rainfall days, and 24.41" (620mm) of precipitation is accumulated.

Snowfall

In Clifton Heights, snow does not fall in May through October.

Daylight

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

Sunshine

The average sunshine in September is 8.9h.

UV index

In Clifton Heights, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for ordinary individuals.
Note: The daily high UV index of 5 during September translates into the following recommendations:
Act with care - The suggestion to avoid sunburn is emphasized. The solar radiation around mid-day is intense; avoid the Sun and stay safe. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses.
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature?

The average high-temperature and low-temperature in Clifton Heights during September are 76.6°F (24.8°C) and 60.8°F (16°C) respectively. In August, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which represents the influence of relative humidity on air temperature, is estimated at 91.4°F (33°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 Clifton Heights?

In Clifton Heights, during September, the rain falls for 12.3 days and regularly aggregates up to 1.57" (40mm) of precipitation.

When it does not snow?

May through October are months without snowfall.

How many hours of daylight does Clifton Heights have in September?

The average day length in September is 12h and 26min.

What time are sunrise and sunset in September?

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.

How many hours of sunshine does Clifton Heights have in September?

The average sunshine duration in September is 8.9h.

What is the UV index reading in September?

The average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a moderate health threat 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
Clifton Heights, PA

Average temperature in September - Clifton Heights, PA
  • Average high temperature in September: 76.6°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (37.4°F).

  • Average low temperature in September: 60.8°F

The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (25.7°F).

Average pressure in September
Clifton Heights, PA

Average pressure in September - Clifton Heights, 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
Clifton Heights, PA

Average wind speed in September - Clifton Heights, PA
  • Average wind speed in September: 6mph

The windiest months (with the highest average wind speed) are February, March and April (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).

Average humidity in September
Clifton Heights, PA

Average humidity in September - Clifton Heights, PA
  • Average humidity in September: 76%

The months with the highest relative humidity are February, October and December (77%).
The month with the lowest relative humidity is April (71%).

Average rainfall in September
Clifton Heights, PA

Average rainfall in September - Clifton Heights, PA
  • Average rainfall in September: 1.57"

The wettest month (with the highest rainfall) is August (2.95").
The driest month (with the least rainfall) is January (1.46").

Average rainfall days in September
Clifton Heights, PA

Average rainfall days in September - Clifton Heights, PA
  • Average rainfall days in September: 12.3 days

The month with the highest number of rainy days is July (16.9 days).
The month with the least rainy days is January (6.6 days).

Average snowfall in September
Clifton Heights, PA

Average snowfall in September - Clifton Heights, PA
  • Average snowfall in September: 0"

The month with the highest snowfall is March (2.05").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Clifton Heights, PA

Average snowfall days in September - Clifton Heights, PA
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (3.3 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
Clifton Heights, PA

Average daylight in September / Average sunshine in September - Clifton Heights, 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 54min).

Average sunshine days in September
Clifton Heights, PA

Average sunshine days in September - Clifton Heights, PA
  • Average sunshine days in September: 16.2 days

The month with the most sunshine days is January (20.8 days).
The month with the least sunshine days is July (12.1 days).

Average UV index in September
Clifton Heights, PA

Average UV index in September - Clifton Heights, 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
Clifton Heights, PA

Average cloud cover in September - Clifton Heights, PA
  • Average cloud cover in September: 37

The month with the most cloud cover is February (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).

Average visibility in September
Clifton Heights, PA

Average visibility in September - Clifton Heights, PA
  • Average visibility in September: 6mi

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

Clifton Heights, Pennsylvania, USA

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