September weather forecast and climate
West Simsbury, CT

Weather in September

September, the first month of the autumn, in West Simsbury, is still a pleasant month, with average temperature ranging between max 72.9°F (22.7°C) and min 54.7°F (12.6°C).

Temperature

In September, the average high-temperature marginally drops, from a warm 80.2°F (26.8°C) in August, to an agreeable 72.9°F (22.7°C). In West Simsbury, the average low-temperature is 54.7°F (12.6°C).

Humidity

In September, the average relative humidity in West Simsbury is 77%.

Rainfall

The month with the least rainfall is September when the rain falls for 12.6 days and typically collects 1.97" (50mm) of precipitation.

Snowfall

In West Simsbury snow does not fall in June through September.

Daylight

In September, the average length of the day is 12.5h.

Sunshine

In September, the average sunshine is 8.6h.

UV index

In West Simsbury, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate threat to health from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions - Protection against sun damage is advised. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.
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FAQ

What is the temperature in September in West Simsbury?

In September, in West Simsbury, the average high-temperature is 72.9°F (22.7°C), and the average low-temperature is 54.7°F (12.6°C).

What is the average humidity in September in West Simsbury?

The average relative humidity in September in West Simsbury is 77%.

How many days does it rain in September in West Simsbury?

In West Simsbury, in September, it is raining for 12.6 days, with typically 1.97" (50mm) of accumulated precipitation.

What is the driest month in West Simsbury?

The month with the least rainfall in West Simsbury, Connecticut, is September when the rain falls for 12.6 days and typically collects 1.97" (50mm) of precipitation.

Does it snow in West Simsbury in September?

In West Simsbury, Connecticut, in September, it doesn't snow. In October, it regularly snows.

When it does not snow in West Simsbury?

In West Simsbury, Connecticut, snow does not fall in June through September.

What is the average length of the day in September in West Simsbury?

In September, the average length of the day in West Simsbury, Connecticut, is 12.5h.

How many hours of sunshine does West Simsbury have in September?

The average sunshine in September in West Simsbury, Connecticut, is 8.6h.

What is the UV index intensity in September in West Simsbury?

In September, the average daily maximum UV index is 4. A UV Index of 3 to 5 symbolizes a medium hazard to health from unprotected exposure to the UV radiation.

Average temperature in September
West Simsbury, CT

Average temperature in September - West Simsbury, CT
  • Average high temperature in September: 72.9°F

The warmest month (with the highest average high temperature) is July (82.2°F).
The month with the lowest average high temperature is January (32°F).

  • Average low temperature in September: 54.7°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).

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Average pressure in September
West Simsbury, CT

Average pressure in September - West Simsbury, CT
  • Average pressure in September: 30.06"

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

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Average wind speed in September
West Simsbury, CT

Average wind speed in September - West Simsbury, CT
  • Average wind speed in September: 5.8mph

The windiest months (with the highest average wind speed) are January and March (8.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).

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Average humidity in September
West Simsbury, CT

Average humidity in September - West Simsbury, CT
  • Average humidity in September: 77%

The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (71%).

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Average rainfall in September
West Simsbury, CT

Average rainfall in September - West Simsbury, CT
  • Average rainfall in September: 1.97"

The wettest month (with the highest rainfall) is December (3.43").
The driest month (with the least rainfall) is September (1.97").

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Average rainfall days in September
West Simsbury, CT

Average rainfall days in September - West Simsbury, CT
  • Average rainfall days in September: 12.6 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (9.4 days).

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Average snowfall in September
West Simsbury, CT

Average snowfall in September - West Simsbury, CT
  • Average snowfall in September: 0"

The month with the highest snowfall is February (5.24").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in September
West Simsbury, CT

Average snowfall days in September - West Simsbury, CT
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (8.9 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
West Simsbury, CT

Average daylight in September / Average sunshine in September - West Simsbury, 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: 8.6h

Months with the most sunshine are July and August (Average sunshine: 10.3h).
The month with the least sunshine is February (Average sunshine: 4.6h).

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Average sunshine days in September
West Simsbury, CT

Average sunshine days in September - West Simsbury, CT
  • Average sunshine days in September: 15.7 days

The month with the most sunshine days is January (17.1 days).
The month with the least sunshine days is June (11.6 days).

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Average UV index in September
West Simsbury, CT

Average UV index in September - West Simsbury, 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
West Simsbury, CT

Average cloud cover in September - West Simsbury, CT
  • Average cloud cover in September: 38

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 34).

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Average visibility in September
West Simsbury, CT

Average visibility in September - West Simsbury, CT
  • Average visibility in September: 5mi

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

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