September weather forecast
Shelter Harbor, RI

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Weather in September

The first month of the autumn, September, is also an agreeable month in Shelter Harbor, Rhode Island, with temperature in the range of an average high of 71.2°F (21.8°C) and an average low of 60.4°F (15.8°C).

Temperature

September signifies a gentle decline in Shelter Harbor's average high-temperature, easing from a warm 77.5°F (25.3°C) in August to an agreeable 71.2°F (21.8°C). Shelter Harbor's temperature drops to an average low of 60.4°F (15.8°C) during the nights of September.

Humidity

In September, the average relative humidity is 78%.

Rainfall

September is the month with the least rainfall. Rain falls for 13 days and accumulates 1.81" (46mm) of precipitation.

Snowfall

In Shelter Harbor, snow does not fall in May through October.

Daylight

In September, the average length of the day is 12h and 28min.
On the first day of the month, sunrise is at 6:13 am and sunset at 7:19 pm. On the last day of September, sunrise is at 6:43 am and sunset at 6:29 pm EDT.

Sunshine

The average sunshine in September is 8.9h.

UV index

In September, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the average person.
Note: An average UV index of 4 in September transforms into this advice:
Ensure safety - Recommendations to avert sunburn are presented. To avoid the Sun's strongest rays, limit exposure around the mid-day period. Protect your eyes, ears, face, and neck from the Sun by wearing a wide-brimmed hat.
Updated: Aug 15, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the usual temperature for Shelter Harbor in September?

The high-temperature, in September, in Shelter Harbor, is 71.2°F (21.8°C), while the low-temperature averages to 60.4°F (15.8°C).

What is the average humidity in September?

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

What is the driest month?

The month with the least rainfall is September, when the rain falls for 13 days and typically collects 1.81" (46mm) of precipitation.

How much does it rain in September?

In Shelter Harbor, Rhode Island, in September, it is raining for 13 days, with typically 1.81" (46mm) of accumulated precipitation.

When it does not snow?

May through October are months without snowfall.

What is the average length of the day in September?

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

When is the sunrise / sunset in September?

In September, on the first day of the month, sunrise is at 6:13 am and sunset at 7:19 pm. On the last day of the month, sunrise is at 6:43 am and sunset at 6:29 pm EDT.

How long on average sun shines in September?

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 reading of 3 to 5 represents a moderate vulnerability from unsafe 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
Shelter Harbor, RI

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

The warmest month (with the highest average high temperature) is July (77.7°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in September: 60.4°F

The month with the highest average low temperature is July (67.1°F).
The coldest month (with the lowest average low temperature) is January (27°F).

Average pressure in September
Shelter Harbor, RI

Average pressure in September - Shelter Harbor, RI
  • Average pressure in September: 30.06"Hg

The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in September
Shelter Harbor, RI

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

The windiest month (with the highest average wind speed) is January (12.5mph).
The calmest months (with the lowest average wind speed) are July and August (8.3mph).

Average humidity in September
Shelter Harbor, RI

Average humidity in September - Shelter Harbor, RI
  • Average humidity in September: 78%

The months with the highest relative humidity are June and July (81%).
The months with the lowest relative humidity are March and November (74%).

Average rainfall in September
Shelter Harbor, RI

Average rainfall in September - Shelter Harbor, RI
  • Average rainfall in September: 1.81"

The wettest month (with the highest rainfall) is December (3.39").
The driest month (with the least rainfall) is September (1.81").

Average rainfall days in September
Shelter Harbor, RI

Average rainfall days in September - Shelter Harbor, RI
  • Average rainfall days in September: 13 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (8.6 days).

Average snowfall in September
Shelter Harbor, RI

Average snowfall in September - Shelter Harbor, RI
  • Average snowfall in September: 0"

The month with the highest snowfall is March (1.85").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Shelter Harbor, RI

Average snowfall days in September - Shelter Harbor, RI
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is January (5.6 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
Shelter Harbor, RI

Average daylight in September / Average sunshine in September - Shelter Harbor, 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 36min).
The month with the least sunshine is December (Average sunshine: 4h and 48min).

Average sunshine days in September
Shelter Harbor, RI

Average sunshine days in September - Shelter Harbor, RI
  • Average sunshine days in September: 15 days

The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is July (11 days).

Average UV index in September
Shelter Harbor, RI

Average UV index in September - Shelter Harbor, 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 and December (UV index 2).

Average cloud cover in September
Shelter Harbor, RI

Average cloud cover in September - Shelter Harbor, RI
  • Average cloud cover in September: 32

The months with the most cloud cover are March and December (Cloud cover 47).
The month with the least cloud cover is August (Cloud cover 28).

Average visibility in September
Shelter Harbor, RI

Average visibility in September - Shelter Harbor, 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).

Shelter Harbor, Rhode Island, USA

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