September weather forecast
Grosvenor Dale, CT

Weather in September

The first month of the autumn, September, is still a pleasant month in Grosvenor Dale, Connecticut, with average temperature varying between 53.8°F (12.1°C) and 72°F (22.2°C).

Temperature

In Grosvenor Dale, Connecticut, the average high-temperature in September slightly decreases, from a warm 79.5°F (26.4°C) in August, to a pleasant 72°F (22.2°C). In September, in Grosvenor Dale, the average low-temperature is 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. Rain falls for 12.4 days and accumulates 1.81" (46mm) of precipitation.

Snowfall

June through September are months without snowfall.

Daylight

In Grosvenor Dale, the average length of the day is 12.5h.

Sunshine

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 estimate of 3 to 5 represents a medium health hazard from unsafe exposure to the UV radiation for ordinary individuals.
Note: In September, the average maximum UV index of 4 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects.
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FAQ

What is the average humidity in September in Grosvenor Dale?

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

What is the driest month in Grosvenor Dale?

The month with the least rainfall in Grosvenor Dale, Connecticut, is September when the rain falls for 12.4 days and typically collects 1.81" (46mm) of precipitation.

How much does it rain in Grosvenor Dale in September?

In Grosvenor Dale, in September, it is raining for 12.4 days, with typically 1.81" (46mm) of accumulated precipitation.

When it does not snow in Grosvenor Dale?

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

Does it snow in Grosvenor Dale in September?

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

How many hours of daylight does Grosvenor Dale have in September?

The average length of the day in September is 12.5h.

How many hours of sunshine does Grosvenor Dale have in September?

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

How high is the UV index in September in Grosvenor Dale?

The average daily maximum UV index in September is 4. A UV Index reading of 3 to 5 represents a medium hazard to health from the exposure to the Sun's UV radiation.

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"

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

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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).
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"

Months with the highest snowfall are February and March (5.08").
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).
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: 12.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in September: 8h

The month with the most sunshine is August (Average sunshine: 10h).
The month with the least sunshine is February (Average sunshine: 4.5h).

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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

Months with the highest UV index are June and July (UV index 6).
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

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

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