September weather forecast
Grosvenor Dale, CT

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Weather in September

September, the first month of the autumn in Grosvenor Dale, is still a pleasant month, with temperature in the range of an average high of 72°F (22.2°C) and an average low of 53.8°F (12.1°C).

Temperature

Grosvenor Dale's progression into September involves a minor drop in the average high-temperature, slightly receding from a moderately hot 79.5°F (26.4°C) in August to an agreeable 72°F (22.2°C). In the month of September, Grosvenor Dale witnesses a consistent average low-temperature of 53.8°F (12.1°C).

Humidity

In Grosvenor Dale, the average relative humidity in September is 79%.

Rainfall

September is the month with the least rainfall in Grosvenor Dale, Connecticut. Rain falls for 12.4 days and accumulates 1.81" (46mm) of precipitation.

Snowfall

In Grosvenor Dale, snow does not fall in June through September.

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 7:20 pm. On the last day of the month, sunrise is at 6:44 am and sunset at 6:30 pm EDT.

Sunshine

In September, the average sunshine in Grosvenor Dale is 8h.

UV index

In September, the average daily maximum UV index in Grosvenor Dale is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.
Note: The maximum daily UV index of 4 in September converts into the following recommendations:
Guard yourself - An obligation to protect skin and eyes from harm exists. Considering the strength of solar radiation at midday, one should avoid direct Sun exposure. On days when the sun blazes, arm yourself with sunglasses that block UVA and UVB radiation.
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Frequently asked questions

What are September temperatures in Grosvenor Dale?

The average high-temperature, in September, in Grosvenor Dale, is 72°F (22.2°C), while the average low-temperature is 53.8°F (12.1°C). The average heat index (a.k.a. 'apparent temperature', 'felt air temperature'), which combines air temperature and relative humidity, in July is evaluated at 86°F (30°C).

What is the average humidity in September in Grosvenor Dale?

In Grosvenor Dale, the average relative humidity in September is 79%.

What is the driest month in Grosvenor Dale?

September is the month with the least rainfall in Grosvenor Dale, Connecticut. Rain falls for 12.4 days and accumulates 1.81" (46mm) of precipitation.

How many days does it rain in September in Grosvenor Dale?

In September, the rain falls for 12.4 days. Throughout September, 1.81" (46mm) of precipitation is accumulated.

When it does not snow in Grosvenor Dale?

In Grosvenor Dale, snow does not fall in June through September.

Does it snow in Grosvenor Dale in September?

In Grosvenor Dale, in September, it doesn't snow. In October, it regularly snows.

What is the average length of the day in September in Grosvenor Dale?

In September, the average day length in Grosvenor Dale, Connecticut, is 12h and 28min.

What time are sunrise and sunset in September in Grosvenor Dale?

In September, on the first day of the month, sunrise is at 6:13 am and sunset at 7:20 pm. On the last day of the month, in Grosvenor Dale, Connecticut, sunrise is at 6:44 am and sunset at 6:30 pm EDT.

How long on average sun shines in September in Grosvenor Dale?

In Grosvenor Dale, the average sunshine duration in September is 8h.

What is the UV index reading in September in Grosvenor Dale?

The average daily maximum UV index in September in Grosvenor Dale, Connecticut, is 4. A UV Index reading of 3 to 5 represents a moderate vulnerability 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
Grosvenor Dale, CT

Average temperature in September - Grosvenor Dale, CT
  • Average high temperature in September: 72°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (31.5°F).

  • Average low temperature in September: 53.8°F

The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (19.6°F).

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Average pressure in September
Grosvenor Dale, CT

Average pressure in September - Grosvenor Dale, CT
  • 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).

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Average wind speed in September
Grosvenor Dale, CT

Average wind speed in September - Grosvenor Dale, CT
  • Average wind speed in September: 6.2mph

The windiest month (with the highest average wind speed) is January (9mph).
The calmest month (with the lowest average wind speed) is August (5.7mph).

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Average humidity in September
Grosvenor Dale, CT

Average humidity in September - Grosvenor Dale, CT
  • Average humidity in September: 79%

The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in September
Grosvenor Dale, CT

Average rainfall in September - Grosvenor Dale, CT
  • Average rainfall in September: 1.81"

The wettest month (with the highest rainfall) is December (3.11").
The driest month (with the least rainfall) is September (1.81").

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Average rainfall days in September
Grosvenor Dale, CT

Average rainfall days in September - Grosvenor Dale, CT
  • Average rainfall days in September: 12.4 days

The month with the highest number of rainy days is July (16.3 days).
The months with the least rainy days are January and February (7.8 days).

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Average snowfall in September
Grosvenor Dale, CT

Average snowfall in September - Grosvenor Dale, CT
  • Average snowfall in September: 0"

The months with the highest snowfall are February and March (5.08").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
Grosvenor Dale, CT

Average snowfall days in September - Grosvenor Dale, CT
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is March (9.1 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in September /
Average sunshine in September
Grosvenor Dale, CT

Average daylight in September / Average sunshine in September - Grosvenor Dale, CT
  • 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 0min

The month with the most sunshine is August (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

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Average sunshine days in September
Grosvenor Dale, CT

Average sunshine days in September - Grosvenor Dale, CT
  • Average sunshine days in September: 15.9 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (12.9 days).

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Average UV index in September
Grosvenor Dale, CT

Average UV index in September - Grosvenor Dale, CT
  • Average UV index in September: 4

The months with the highest UV index are June and July (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
Grosvenor Dale, CT

Average cloud cover in September - Grosvenor Dale, CT
  • Average cloud cover in September: 42

The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 37).

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Average visibility in September
Grosvenor Dale, CT

Average visibility in September - Grosvenor Dale, CT
  • Average visibility in September: 5mi

The months with the highest visibility are March, April, November and December (6mi).
The months with the lowest visibility are January, February, May, June, July, August, September and October (5mi).

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Grosvenor Dale, Connecticut, USA

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