September weather forecast
Tinicum, PA

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Weather in September

The first month of the autumn, September, is still a warm month in Tinicum, Pennsylvania, with an average temperature fluctuating between 76.1°F (24.5°C) and 57.9°F (14.4°C).

Temperature

The arrival of September corresponds with a minor reduction in the average high-temperature, down from August's 82.8°F (28.2°C) to a still warm 76.1°F (24.5°C). In Tinicum, September is marked by an average low-temperature of 57.9°F (14.4°C).

Humidity

The average relative humidity in September is 77%.

Rainfall

The month with the least rainfall in Tinicum is September, when the rain falls for 12 days and typically collects 1.65" (42mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in September is 12h and 27min.
On the first day of the month, sunrise is at 6:28 am and sunset at 7:31 pm. On the last day of September, sunrise is at 6:56 am and sunset at 6:43 pm EDT.

Sunshine

In September, the average sunshine is 8.8h.

UV index

In September, the average daily maximum UV index in Tinicum is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for ordinary individuals.
Note: A daily maximum UV index of 4 in September translates into the following instructions:
Take necessary precautions - Defending against sun damage is advocated. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection.
Updated: Aug 21, 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 Tinicum, the average high-temperature is 76.1°F (24.5°C), and the average low-temperature is 57.9°F (14.4°C). The average heat index (a.k.a. 'felt air temperature', 'apparent temperature'), which factors the actual air temperature with the relative humidity, in August is estimated at 89.6°F (32°C).

What is the average humidity in September?

The average relative humidity in September is 77%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 12 days and accumulates 1.65" (42mm) of precipitation.

How many days does it rain in September?

In Tinicum, in September, during 12 rainfall days, 1.65" (42mm) of precipitation is typically accumulated.

When it does not snow?

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

Does it snow in September?

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

How many hours of daylight does Tinicum have in September?

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

When are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:28 am and sunset at 7:31 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 6:43 pm EDT.

How long on average sun shines in September?

In September, the average sunshine duration is 8.8h.

What is the UV index reading in September?

In Tinicum, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health threat from exposure to the Sun's 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
Tinicum, PA

Average temperature in September - Tinicum, PA
  • Average high temperature in September: 76.1°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (35.6°F).

  • Average low temperature in September: 57.9°F

The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (23.4°F).

Average pressure in September
Tinicum, PA

Average pressure in September - Tinicum, PA
  • Average pressure in September: 30.06"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
Tinicum, PA

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

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in September
Tinicum, PA

Average humidity in September - Tinicum, PA
  • Average humidity in September: 77%

The months with the highest relative humidity are February and October (79%).
The month with the lowest relative humidity is April (73%).

Average rainfall in September
Tinicum, PA

Average rainfall in September - Tinicum, PA
  • Average rainfall in September: 1.65"

The wettest month (with the highest rainfall) is July (2.87").
The driest month (with the least rainfall) is September (1.65").

Average rainfall days in September
Tinicum, PA

Average rainfall days in September - Tinicum, PA
  • Average rainfall days in September: 12 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (8.7 days).

Average snowfall in September
Tinicum, PA

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

The month with the highest snowfall is March (2.76").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in September
Tinicum, PA

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

The month with the highest number of snowfall days is January (7.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Tinicum, 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 18min).

  • 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
Tinicum, PA

Average sunshine days in September - Tinicum, PA
  • Average sunshine days in September: 15.6 days

The month with the most sunshine days is November (18.5 days).
The month with the least sunshine days is June (11 days).

Average UV index in September
Tinicum, PA

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

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, March, November and December (UV index 2).

Average cloud cover in September
Tinicum, PA

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

The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 32).

Average visibility in September
Tinicum, PA

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

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

Tinicum, Pennsylvania, USA

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