September weather forecast
Riverside, PA

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Weather in September

September, the first month of the autumn in Riverside, is also an agreeable month, with an average temperature ranging between min 52.9°F (11.6°C) and max 73°F (22.8°C).

Temperature

As September arrives, Riverside's weather displays a minor decrease in high-temperatures, transitioning from August's moderately hot 80.1°F (26.7°C) to an agreeable 73°F (22.8°C). Riverside in September experiences a low-temperature average of 52.9°F (11.6°C).

Humidity

In Riverside, the average relative humidity in September is 79%.

Rainfall

In Riverside, Pennsylvania, in September, during 12.4 rainfall days, 2.17" (55mm) of precipitation is typically accumulated. In Riverside, during the entire year, the rain falls for 157.2 days and collects up to 30.43" (773mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

The average length of the day in September is 12h and 27min.
On the first day of September in Riverside, Pennsylvania, sunrise is at 6:34 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:49 pm EDT.

Sunshine

The average sunshine in September is 8.7h.

UV index

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The maximum UV index, 4 during September, leads to the following recommendations:
Take measures. Individuals with light skin might experience burns in under 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun.
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Frequently asked questions

What is the temperature in September in Riverside?

In Riverside, 73°F (22.8°C) is the average high-temperature and 52.9°F (11.6°C) is the average low-temperature during September. The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which represents the influence of relative humidity on air temperature, in July is appraised at 87.8°F (31°C).

What is the average humidity in September in Riverside?

The average relative humidity in September in Riverside is 79%.

How many days does it rain in September in Riverside?

In Riverside, Pennsylvania, during September, the rain falls for 12.4 days and regularly aggregates up to 2.17" (55mm) of precipitation.

When it does not snow in Riverside?

June through September are months without snowfall in Riverside.

Does it snow in Riverside in September?

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

What is the average length of the day in September in Riverside?

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

When is the sunrise / sunset in September in Riverside?

On the first day of September in Riverside, sunrise is at 6:34 am and sunset at 7:38 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 6:49 pm EDT.

How many hours of sunshine does Riverside have in September?

In September, the average sunshine duration is 8.7h.

What is the UV index reading in September in Riverside?

The average daily maximum UV index in September in Riverside, Pennsylvania, is 4. A UV Index estimate of 3 to 5 represents a medium health risk from 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
Riverside, PA

Average temperature in September - Riverside, PA
  • Average high temperature in September: 73°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (32°F).

  • Average low temperature in September: 52.9°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure in September
Riverside, PA

Average pressure in September - Riverside, PA
  • Average pressure in September: 30.07"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).

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Average wind speed in September
Riverside, PA

Average wind speed in September - Riverside, PA
  • Average wind speed in September: 5.3mph

The windiest months (with the highest average wind speed) are March and April (8mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity in September
Riverside, PA

Average humidity in September - Riverside, PA
  • Average humidity in September: 79%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (76%).

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Average rainfall in September
Riverside, PA

Average rainfall in September - Riverside, PA
  • Average rainfall in September: 2.17"

The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is January (2.05").

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Average rainfall days in September
Riverside, PA

Average rainfall days in September - Riverside, PA
  • Average rainfall days in September: 12.4 days

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (8.3 days).

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Average snowfall in September
Riverside, PA

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

The month with the highest snowfall is February (4.8").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Riverside, PA

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

The month with the highest number of snowfall days is January (9.9 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Riverside, PA
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 0min).

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Average sunshine days in September
Riverside, PA

Average sunshine days in September - Riverside, PA
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is July (10.5 days).

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Average UV index in September
Riverside, PA

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

The month with the highest UV index is June (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in September
Riverside, PA

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

The months with the most cloud cover are January, February and December (Cloud cover 56).
The month with the least cloud cover is July (Cloud cover 34).

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Average visibility in September
Riverside, PA

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

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

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Riverside, Pennsylvania, USA

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