September weather forecast
Tiverton, RI

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Weather in September

As Tiverton proceeds into September, there's a perceptible change in the air. The peak summer temperatures begin to gradually decrease, going down to a comfortable 72.1°F (22.3°C). The weather summons a calming atmosphere, with the trees starting to reveal the first signs of autumn colors. September's weather is ideal for those who prefer a balance of warm days and cooler nights.

Temperature

The onset of September entails a subtle temperature shift, as the average high-temperature eases from a moderately hot 78.6°F (25.9°C) in August to a pleasant 72.1°F (22.3°C). An average nighttime temperature of 58.8°F (14.9°C) is noted in Tiverton during the month of September.

Humidity

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

Rainfall

September is the month with the least rainfall in Tiverton. Rain falls for 11.2 days and accumulates 1.06" (27mm) of precipitation.

Snowfall

In Tiverton, snow does not fall in June through October.

Ocean temperature

In Tiverton, in September, the average water temperature is 66.7°F (19.3°C).
Note: Most people do not enjoy swimming in water that is 66.7°F (19.3°C). Breathing becomes increasingly challenging as the water temperature dips under 69.8°F (21°C).

Daylight

In Tiverton, the average length of the day in September is 12h and 28min.
On the first day of September in Tiverton, sunrise is at 6:11 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:27 pm EDT.

Sunshine

The average sunshine in September in Tiverton is 8.8h.

UV index

In Tiverton, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: A daily maximum UV index of 4 in September translates into the following instructions:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Employ a hat with a wide brim for robust protection, cutting UV exposure by half.
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What are the temperatures in Tiverton in September?

The average high-temperature, in September, in Tiverton, is 72.1°F (22.3°C), while the average low-temperature is 58.8°F (14.9°C).

What is the average humidity in September in Tiverton?

The average relative humidity in September is 78%.

What is the driest month in Tiverton?

The month with the least rainfall is September, when the rain falls for 11.2 days and typically collects 1.06" (27mm) of precipitation.

How much does it rain in Tiverton in September?

In Tiverton, Rhode Island, in September, it is raining for 11.2 days, with typically 1.06" (27mm) of accumulated precipitation.

When it does not snow in Tiverton?

In Tiverton, snow does not fall in June through October.

How cold is the water in September in Tiverton?

In September, the average ocean temperature is 66.7°F (19.3°C). For swimming, a surface water temperature of 66.7°F (19.3°C) is not enjoyable for the majority. It is not considered safe, as controlling breathing becomes progressively more difficult as water temperature decreases below 69.8°F (21°C).

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

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

When is the sunrise / sunset in September in Tiverton?

In September, on the first day of the month, sunrise is at 6:11 am and sunset at 7:17 pm. On the last day of the month, sunrise is at 6:41 am and sunset at 6:27 pm EDT.

How long on average sun shines in September in Tiverton?

The average sunshine duration in September in Tiverton, Rhode Island, is 8.8h.

What is the UV index reading in September in Tiverton?

In September, the average daily maximum UV index in Tiverton, Rhode Island, is 4. A UV Index reading of 3 to 5 represents a moderate health threat 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
Tiverton, RI

Average temperature in September - Tiverton, RI
  • Average high temperature in September: 72.1°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (36°F).

  • Average low temperature in September: 58.8°F

The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).

Average pressure in September
Tiverton, RI

Average pressure in September - Tiverton, 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
Tiverton, RI

Average wind speed in September - Tiverton, RI
  • Average wind speed in September: 8.2mph

The windiest months (with the highest average wind speed) are January, February and March (10.9mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).

Average humidity in September
Tiverton, RI

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

The month with the highest relative humidity is June (80%).
The month with the lowest relative humidity is April (73%).

Average rainfall in September
Tiverton, RI

Average rainfall in September - Tiverton, RI
  • Average rainfall in September: 1.06"

The wettest month (with the highest rainfall) is October (1.97").
The driest month (with the least rainfall) is September (1.06").

Average rainfall days in September
Tiverton, RI

Average rainfall days in September - Tiverton, RI
  • Average rainfall days in September: 11.2 days

The month with the highest number of rainy days is July (15 days).
The month with the least rainy days is February (6.9 days).

Average snowfall in September
Tiverton, RI

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

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

Average snowfall days in September
Tiverton, RI

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

The month with the highest number of snowfall days is January (5.9 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average sea temperature in September
Tiverton, RI

Average sea temperature in September - Tiverton, RI
  • Average sea temperature in September: 66.7°F

The best month for swimming (with the highest average sea temperature) is August (69.3°F).
The coldest month (with the lowest average sea temperature) is February (38.1°F).

Average daylight in September /
Average sunshine in September
Tiverton, RI

Average daylight in September / Average sunshine in September - Tiverton, 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 months with the least sunshine are February and December (Average sunshine: 4h and 54min).

Average sunshine days in September
Tiverton, RI

Average sunshine days in September - Tiverton, RI
  • Average sunshine days in September: 15.9 days

The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is April (13.6 days).

Average UV index in September
Tiverton, RI

Average UV index in September - Tiverton, 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
Tiverton, RI

Average cloud cover in September - Tiverton, RI
  • Average cloud cover in September: 32

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
Tiverton, RI

Average visibility in September - Tiverton, 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).

Tiverton, Rhode Island, USA

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