September weather forecast
Perryville, RI

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Weather in September

September, the first month of the autumn in Perryville, is still a pleasant month, with temperature in the range of an average low of 59.9°F (15.5°C) and an average high of 71.2°F (21.8°C).

Temperature

September's arrival signals a moderate reduction in the average high-temperature, easing from a warm 77.5°F (25.3°C) in August to an agreeable 71.2°F (21.8°C). During September, the average low-temperature is a mild 59.9°F (15.5°C).

Humidity

In September, the average relative humidity is 78%.

Rainfall

September is the month with the least rainfall. Rain falls for 11.5 days and accumulates 1.5" (38mm) of precipitation.

Snowfall

In Perryville, snow does not fall in April through November.

Daylight

The average length of the day in September is 12h and 28min.
On the first day of September, sunrise is at 6:13 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:29 pm EDT.

Sunshine

The average sunshine in September is 8.8h.

UV index

In Perryville, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.
Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Adopt protective measures - Requirement to safeguard skin and eyes from harm exists. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Boost your sun resistance with garments that are densely woven yet spacious.
Updated: Jul 22, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in September?

September temperatures vary between a high-temperature of 71.2°F (21.8°C) and a low-temperature of 59.9°F (15.5°C).

What is the average humidity in September?

The average relative humidity in September is 78%.

What is the driest month?

September is the month with the least rainfall. Rain falls for 11.5 days and accumulates 1.5" (38mm) of precipitation.

How much does it rain in Perryville in September?

In Perryville, in September, it is raining for 11.5 days, with typically 1.5" (38mm) of accumulated precipitation.

When it does not snow?

April through November are months without snowfall.

How many hours of daylight does Perryville have in September?

In September, the average day length is 12h and 28min.

What time are sunrise and sunset in September?

On the first day of September, sunrise is at 6:13 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:29 pm EDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.8h.

What is the UV index intensity in September?

In Perryville, the average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability 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
Perryville, RI

Average temperature in September - Perryville, RI
  • Average high temperature in September: 71.2°F

The warmest months (with the highest average high temperature) are July and August (77.5°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in September: 59.9°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 (26.8°F).

Average pressure in September
Perryville, RI

Average pressure in September - Perryville, RI
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.07"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in September
Perryville, RI

Average wind speed in September - Perryville, RI
  • Average wind speed in September: 9.4mph

The windiest month (with the highest average wind speed) is January (12.6mph).
The calmest month (with the lowest average wind speed) is August (8.4mph).

Average humidity in September
Perryville, RI

Average humidity in September - Perryville, RI
  • Average humidity in September: 78%

The month with the highest relative humidity is June (82%).
The months with the lowest relative humidity are March, April and November (74%).

Average rainfall in September
Perryville, RI

Average rainfall in September - Perryville, RI
  • Average rainfall in September: 1.5"

The wettest month (with the highest rainfall) is December (3.35").
The driest month (with the least rainfall) is September (1.5").

Average rainfall days in September
Perryville, RI

Average rainfall days in September - Perryville, RI
  • Average rainfall days in September: 11.5 days

The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (7.3 days).

Average snowfall in September
Perryville, RI

Average snowfall in September - Perryville, RI
  • Average snowfall in September: 0"

The month with the highest snowfall is March (2.13").
The months with the least snowfall are April, May, June, July, August, September, October and November (0").

Average snowfall days in September
Perryville, RI

Average snowfall days in September - Perryville, RI
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (5.3 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
Perryville, RI

Average daylight in September / Average sunshine in September - Perryville, RI
  • 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 12min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

Average sunshine days in September
Perryville, RI

Average sunshine days in September - Perryville, RI
  • Average sunshine days in September: 16.2 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is July (12.2 days).

Average UV index in September
Perryville, RI

Average UV index in September - Perryville, RI
  • 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
Perryville, RI

Average cloud cover in September - Perryville, RI
  • Average cloud cover in September: 33

The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).

Average visibility in September
Perryville, RI

Average visibility in September - Perryville, RI
  • 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).

Perryville, Rhode Island, USA

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