September weather forecast
Warwick, RI

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Pawtuxet river flowing beside the ruins of the old cotton mill in Warwick, Rhode Island
Pawtuxet river flowing beside the ruins of the old cotton mill in Warwick, Rhode Island

Weather in September

September in Warwick signals the commencement of the fall season, marked by pleasant temperatures and the gradual transformation of the city's foliage. The decrease in rainfall, falling to 1.26" (32mm) over 11.3 days, marks one of the driest months for Warwick. The transformation from summer to fall is welcomed with open arms as the weather becomes milder. Despite the reduced rain, the sea remains warm, encouraging beach-goers to continue enjoying water activities. Throughout September, residents and visitors enjoy the comfortable temperatures and the city's beautiful autumnal landscapes, while anticipating the further drop in temperatures that October will bring.

Temperature

September's arrival comes with a mild decrease in the average high-temperature, moving subtly from a moderately hot 79.5°F (26.4°C) in August to a pleasant 72.5°F (22.5°C). In Warwick, in September, the average low-temperature is a mild 58.1°F (14.5°C).

Humidity

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

Rainfall

The month with the least rainfall is September, when the rain falls for 11.3 days and typically collects 1.26" (32mm) of precipitation.

Snowfall

In Warwick, snow does not fall in May through October.

Ocean temperature

In Warwick, the average seawater temperature in September is 66.7°F (19.3°C).
Note: Swimming in 66.7°F (19.3°C) is not a pleasurable activity for the majority of people. Breathing becomes increasingly challenging as water temperature descends from 69.8°F (21°C) to 59°F (15°C).

Daylight

In September, the average length of the day is 12h and 28min.
On the first day of September, sunrise is at 6:12 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:28 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 moderate threat to health from exposure to the Sun's UV rays for average individuals.
Note: An average maximum UV index of 4 in September leads to these recommendations:
Prioritize safety - Suggestions to prevent sun damage are offered. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes.

Frequently asked questions

What is the average September temperature?

The high-temperature during September is 72.5°F (22.5°C) and the low-temperature is 58.1°F (14.5°C).

What is the average humidity in September?

In September, the average relative humidity is 78%.

What is the driest month?

The month with the least rainfall is September, when the rain falls for 11.3 days and typically collects 1.26" (32mm) of precipitation.

How many days does it rain in September?

In Warwick, during September, the rain falls for 11.3 days and regularly aggregates up to 1.26" (32mm) of precipitation.

When it does not snow?

In Warwick, Rhode Island, snow does not fall in May through October.

What is the ocean temperature in September?

In Warwick, in September, the average water temperature is 66.7°F (19.3°C). For most, swimming in 66.7°F (19.3°C) is not an enjoyable activity. Furthermore, controlling your breathing becomes progressively more difficult as the water temperature decreases from 69.8°F (21°C) to 59°F (15°C).

What is the average length of the day in September?

The average day length in September is 12h and 28min.

What time are sunrise and sunset in September?

In September, on the first day of the month, sunrise is at 6:12 am and sunset at 7:18 pm. On the last day of the month, sunrise is at 6:42 am and sunset at 6:28 pm EDT.

How long on average sun shines in September?

The average sunshine duration in September is 8.7h.

How high is the UV index in September?

In Warwick, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health risk 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
Warwick, RI

Average temperature in September - Warwick, RI
  • Average high temperature in September: 72.5°F

The warmest month (with the highest average high temperature) is July (80.4°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in September: 58.1°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 (24.3°F).

Average pressure in September
Warwick, RI

Average pressure in September - Warwick, 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
Warwick, RI

Average wind speed in September - Warwick, RI
  • Average wind speed in September: 7.6mph

The windiest month (with the highest average wind speed) is January (10.6mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).

Average humidity in September
Warwick, RI

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

The month with the highest relative humidity is June (79%).
The month with the lowest relative humidity is April (72%).

Average rainfall in September
Warwick, RI

Average rainfall in September - Warwick, RI
  • Average rainfall in September: 1.26"

The wettest month (with the highest rainfall) is December (3.07").
The driest month (with the least rainfall) is September (1.26").

Average rainfall days in September
Warwick, RI

Average rainfall days in September - Warwick, RI
  • Average rainfall days in September: 11.3 days

The month with the highest number of rainy days is June (16.1 days).
The month with the least rainy days is January (8.6 days).

Average snowfall in September
Warwick, RI

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

The month with the highest snowfall is February (2.56").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days in September
Warwick, RI

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

The month with the highest number of snowfall days is January (6.5 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average sea temperature in September
Warwick, RI

Average sea temperature in September - Warwick, 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
Warwick, RI

Average daylight in September / Average sunshine in September - Warwick, RI
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in September: 8h and 4min

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
Warwick, RI

Average sunshine days in September - Warwick, RI
  • Average sunshine days in September: 16.6 days

The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is June (12 days).

Average UV index in September
Warwick, RI

Average UV index in September - Warwick, 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
Warwick, RI

Average cloud cover in September - Warwick, RI
  • Average cloud cover in September: 34

The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).

Average visibility in September
Warwick, RI

Average visibility in September - Warwick, 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).

Warwick, Rhode Island, USA

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