September weather forecast
Manheim, PA

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Weather in September

The first month of the autumn, September, is also a moderately hot month in Manheim, Pennsylvania, with temperature in the range of an average low of 56.1°F (13.4°C) and an average high of 74.5°F (23.6°C).

Temperature

As Manheim enters September, the average high-temperature subtly lowers from the a moderately hot 80.8°F (27.1°C) of August to a still warm 74.5°F (23.6°C). Nighttime temperatures consistently average a refreshing 56.1°F (13.4°C) during September.

Humidity

The average relative humidity in September is 80%.

Rainfall

In Manheim, in September, it is raining for 12.8 days, with typically 2.13" (54mm) of accumulated precipitation. Throughout the year, there are 161.8 rainfall days, and 30.31" (770mm) of precipitation is accumulated.

Snowfall

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

Daylight

In Manheim, the average length of the day in September is 12h and 26min.
On the first day of September, sunrise is at 6:33 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:49 pm EDT.

Sunshine

In Manheim, the average sunshine in September is 8.9h.

UV index

In Manheim, the average daily maximum UV index in September is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: In September, the maximum UV index of 4 suggests this advice:
Take necessary precautions - Suggestions to elude sunburn are provided. Midday Sun has the strongest UV rays, making it crucial to limit exposure and find shade. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage.
Updated: Aug 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

In September, in Manheim, the average high-temperature is 74.5°F (23.6°C), and the average low-temperature is 56.1°F (13.4°C). In August, the average heat index (a.k.a. 'apparent temperature', 'feels like'), which represents the influence of relative humidity on air temperature, is calculated to be 86°F (30°C).

What is the average humidity in September?

In September, the average relative humidity in Manheim, Pennsylvania, is 80%.

How much does it rain in September?

In Manheim, in September, during 12.8 rainfall days, 2.13" (54mm) of precipitation is typically accumulated.

When it does not snow?

June through September are months without snowfall.

Does it snow in September?

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

How many hours of daylight does Manheim have in September?

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

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:33 am and sunset at 7:36 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 6:49 pm EDT.

How long on average sun shines in September?

In Manheim, 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 value of 3 to 5 symbolizes a medium hazard to health 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
Manheim, PA

Average temperature in September - Manheim, PA
  • Average high temperature in September: 74.5°F

The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (35.4°F).

  • Average low temperature in September: 56.1°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
Manheim, PA

Average pressure in September - Manheim, 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
Manheim, PA

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

The windiest month (with the highest average wind speed) is March (8.9mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in September
Manheim, PA

Average humidity in September - Manheim, PA
  • Average humidity in September: 80%

The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is April (76%).

Average rainfall in September
Manheim, PA

Average rainfall in September - Manheim, PA
  • Average rainfall in September: 2.13"

The wettest month (with the highest rainfall) is August (3.31").
The driest month (with the least rainfall) is February (2.09").

Average rainfall days in September
Manheim, PA

Average rainfall days in September - Manheim, PA
  • Average rainfall days in September: 12.8 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (9 days).

Average snowfall in September
Manheim, PA

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

The month with the highest snowfall is March (3.43").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Manheim, PA

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

The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Manheim, 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 36min).

Average sunshine days in September
Manheim, PA

Average sunshine days in September - Manheim, PA
  • Average sunshine days in September: 15.3 days

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

Average UV index in September
Manheim, PA

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

The months with the highest UV index are 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
Manheim, PA

Average cloud cover in September - Manheim, 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
Manheim, PA

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

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

Manheim, Pennsylvania, USA

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