September weather forecast
Shelton, CT

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Weather in September

The onset of fall characterizes September in Shelton, Connecticut. Temperatures begin their gradual descent with average highs at 73°F (22.8°C) and lows at 59.4°F (15.2°C). There's no snowfall, stapling it as the last month before winter starts knocking on the door. The trees start changing colours, painting a striking picture against the clear sky backdrop. Even though weather starts getting nippy, the warmth of the fall colours keeps the spirits high.

Temperature

The onset of September in Shelton, Connecticut, aligns with a soft reduction in the average high-temperature, gently falling from a moderately hot 80.2°F (26.8°C) in August to an agreeable 73°F (22.8°C). Shelton observes an average low-temperature of 59.4°F (15.2°C) during September nights.

Humidity

The average relative humidity in September in Shelton is 76%.

Rainfall

September is the month with the least rainfall. Rain falls for 13.1 days and accumulates 2.24" (57mm) of precipitation.

Snowfall

May through October are months without snowfall.

Daylight

In Shelton, Connecticut, the average length of the day in September is 12h and 28min.
On the first day of September, sunrise is at 6:19 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:35 pm EDT.

Sunshine

In September, the average sunshine in Shelton is 8.9h.

UV index

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for ordinary individuals.
Note: The UV index of 4 in September translates into these instructions:
Put precautions into practice - Ensuring skin and eye safety is a necessity. Avoiding direct sunlight during midday hours helps reduce the risk from intense UV radiation. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes.
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Frequently asked questions

What is the temperature in September in Shelton?

In Shelton, in September, the average high-temperature is 73°F (22.8°C), and the average low-temperature is 59.4°F (15.2°C). The average heat index (a.k.a. 'feels like', 'felt air temperature'), which calculates the temperature value influenced by the moisture in the air, in July is calculated to be 87.8°F (31°C).

What is the average humidity in September in Shelton?

In Shelton, the average relative humidity in September is 76%.

What is the driest month in Shelton?

The month with the least rainfall is September, when the rain falls for 13.1 days and typically collects 2.24" (57mm) of precipitation.

How many days does it rain in September in Shelton?

In Shelton, Connecticut, in September, during 13.1 rainfall days, 2.24" (57mm) of precipitation is typically accumulated.

When it does not snow in Shelton?

May through October are months without snowfall in Shelton.

How many hours of daylight does Shelton have in September?

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

When is the sunrise / sunset in September in Shelton?

In September, on the first day of the month, sunrise is at 6:19 am and sunset at 7:24 pm. On the last day of the month, sunrise is at 6:48 am and sunset at 6:35 pm EDT.

How long on average sun shines in September in Shelton?

In September, the average sunshine duration in Shelton is 8.9h.

What is the UV index reading in September in Shelton?

The average daily maximum UV index in September in Shelton, Connecticut, is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health 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
Shelton, CT

Average temperature in September - Shelton, CT
  • 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 (34.7°F).

  • Average low temperature in September: 59.4°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 (24.6°F).

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Average pressure in September
Shelton, CT

Average pressure in September - Shelton, CT
  • Average pressure in September: 30.05"Hg

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in September
Shelton, CT

Average wind speed in September - Shelton, CT
  • Average wind speed in September: 7mph

The windiest month (with the highest average wind speed) is January (9.6mph).
The calmest months (with the lowest average wind speed) are July and August (6.2mph).

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Average humidity in September
Shelton, CT

Average humidity in September - Shelton, CT
  • Average humidity in September: 76%

The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in September
Shelton, CT

Average rainfall in September - Shelton, CT
  • Average rainfall in September: 2.24"

The wettest month (with the highest rainfall) is December (4.06").
The driest month (with the least rainfall) is September (2.24").

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Average rainfall days in September
Shelton, CT

Average rainfall days in September - Shelton, CT
  • Average rainfall days in September: 13.1 days

The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is January (9.4 days).

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Average snowfall in September
Shelton, CT

Average snowfall in September - Shelton, CT
  • Average snowfall in September: 0"

The month with the highest snowfall is February (3.23").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in September
Shelton, CT

Average snowfall days in September - Shelton, CT
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (7.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in September /
Average sunshine in September
Shelton, CT

Average daylight in September / Average sunshine in September - Shelton, CT
  • 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 5min

The months with the most sunshine are July and August (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

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Average sunshine days in September
Shelton, CT

Average sunshine days in September - Shelton, CT
  • Average sunshine days in September: 14.4 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (10.3 days).

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Average UV index in September
Shelton, CT

Average UV index in September - Shelton, CT
  • 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).

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Average cloud cover in September
Shelton, CT

Average cloud cover in September - Shelton, CT
  • Average cloud cover in September: 34

The months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 30).

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Average visibility in September
Shelton, CT

Average visibility in September - Shelton, CT
  • 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).

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Shelton, Connecticut, USA

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