September weather forecastJeannette, PA

September

Weather in September

The first month of the autumn, September, is still a warm month in Jeannette, Pennsylvania, with temperature in the range of an average high of 74.5°F (23.6°C) and an average low of 54.3°F (12.4°C).

Temperature

September's onset introduces a mild reduction in the average high-temperature, from a moderately hot 80.8°F (27.1°C) in August to a still warm 74.5°F (23.6°C). Jeannette cools down to an average low-temperature of 54.3°F (12.4°C) throughout the month of September.

Humidity

In September, the average relative humidity is 78%.

Rainfall

In September, in Jeannette, the rain falls for 14.6 days. Throughout September, 2.2" (56mm) of precipitation is accumulated. Throughout the year, there are 186 rainfall days, and 34.84" (885mm) of precipitation is accumulated.

Snowfall

In Jeannette, snow does not fall in June through September.

Daylight

In Jeannette, the average length of the day in September is 12h and 27min.
On the first day of the month, sunrise is at 6:46 am and sunset at 7:49 pm. On the last day of September, sunrise is at 7:14 am and sunset at 7:01 pm EDT.

Sunshine

The average sunshine in September is 8.8h.

UV index

In Jeannette, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.
Note: In September, the average maximum UV index of 4 translates into the following recommendations:
Exercise prevention - Precautions against solar damage are endorsed. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. Always opt for UVA and UVB-resistant sunglasses on radiant days.

Updated: Aug 26, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

In Jeannette, in September, the average high-temperature is 74.5°F (23.6°C), and the average low-temperature is 54.3°F (12.4°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which takes the relative humidity and factors it into the air temperature reading, in August is estimated at 86°F (30°C).

In Jeannette, the average relative humidity in September is 78%.

In Jeannette, in September, during 14.6 rainfall days, 2.2" (56mm) of precipitation is typically accumulated.

In Jeannette, snow does not fall in June through September.

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

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

On the first day of September, sunrise is at 6:46 am and sunset at 7:49 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 7:01 pm EDT.

The average sunshine duration in September is 8.8h.

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium hazard to health from exposure to the Sun's UV radiation.

Today

Tomorrow

Long-term

Year J F M A M J J A September O N D

Aug

September

Oct

Average high temperature

80.8°F

74.5°F

61.3°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

5.2mph

5.5mph

7.2mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

12.2

13.4

12.5

Average UV index

Average cloud cover

Average visibility

Average temperature in September
Jeannette, PA

Average high temperature in September: 74.5°F

The warmest month (with the highest average high temperature) is July (82°F).
The month with the lowest average high temperature is January (32.9°F).

Average low temperature in September: 54.3°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 (20.3°F).

Average pressure in September
Jeannette, 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 (29.95"Hg).

Average wind speed in September
Jeannette, PA

Average wind speed in September: 5.3mph

The windiest month (with the highest average wind speed) is January (8.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity in September
Jeannette, PA

Average humidity in September: 78%

The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are April, July and August (77%).

Average rainfall in September
Jeannette, PA

Average rainfall in September: 2.2"

The wettest month (with the highest rainfall) is May (3.74").
The driest month (with the least rainfall) is November (2.01").

Average rainfall days in September
Jeannette, PA

Average rainfall days in September: 14.6 days

The month with the highest number of rainy days is May (20.9 days).
The month with the least rainy days is January (9.8 days).

Average snowfall in September
Jeannette, PA

Average snowfall in September: 0"

The month with the highest snowfall is January (6.65").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Jeannette, PA

Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (17.6 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September: 12h and 24min

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 48min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).