September weather forecast
Plainfield, CT

Weather in September

The first month of the autumn, September, is also an agreeable month in Plainfield, Connecticut, with average temperature ranging between min 55.9°F (13.3°C) and max 72.5°F (22.5°C).

Temperature

In Plainfield, the average high-temperature marginally drops, from a moderately hot 79.7°F (26.5°C) in August, to a pleasant 72.5°F (22.5°C). In September, the average low-temperature is 55.9°F (13.3°C).

Humidity

Months with the highest humidity are February, June, July and September, with an average relative humidity of 79%.

Rainfall

The month with the least rainfall in Plainfield, Connecticut, is September when the rain falls for 13.4 days and typically collects 1.73" (44mm) of precipitation.

Snowfall

June through October are months without snowfall.

Daylight

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

Sunshine

In Plainfield, the average sunshine is 8.5h.

UV index

In Plainfield, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium vulnerability from unsafe exposure to the UV radiation for average 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. 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 are the most humid months in Plainfield?

Months with the highest humidity in Plainfield are February, June, July and September, with an average relative humidity of 79%.

What is the average humidity in September in Plainfield?

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

What is the driest month in Plainfield?

The month with the least rainfall in Plainfield, Connecticut, is September when the rain falls for 13.4 days and typically collects 1.73" (44mm) of precipitation.

How many days does it rain in September in Plainfield?

In Plainfield, Connecticut, in September, it is raining for 13.4 days, with typically 1.73" (44mm) of accumulated precipitation.

When it does not snow in Plainfield?

June through October are months without snowfall.

How many hours of daylight does Plainfield have in September?

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

How many hours of sunshine does Plainfield have in September?

In Plainfield, the average sunshine in September is 8.5h.

How high is the UV index in September in Plainfield?

In Plainfield, Connecticut, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a moderate health threat from the exposure to the Sun's UV radiation.

Average temperature in September
Plainfield, CT

Average temperature in September - Plainfield, CT
  • Average high temperature in September: 72.5°F

The warmest month (with the highest average high temperature) is July (80.8°F).
The month with the lowest average high temperature is January (34°F).

  • Average low temperature in September: 55.9°F

The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).

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Average pressure in September
Plainfield, CT

Average pressure in September - Plainfield, CT
  • Average pressure in September: 30.05"

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
Plainfield, CT

Average wind speed in September - Plainfield, CT
  • Average wind speed in September: 6.8mph

The windiest months (with the highest average wind speed) are January and March (9.4mph).
The calmest month (with the lowest average wind speed) is August (6.1mph).

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Average humidity in September
Plainfield, CT

Average humidity in September - Plainfield, CT
  • Average humidity in September: 79%

Months with the highest relative humidity are February, June, July and September (79%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in September
Plainfield, CT

Average rainfall in September - Plainfield, CT
  • Average rainfall in September: 1.73"

The wettest month (with the highest rainfall) is December (3.39").
The driest month (with the least rainfall) is September (1.73").

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Average rainfall days in September
Plainfield, CT

Average rainfall days in September - Plainfield, CT
  • Average rainfall days in September: 13.4 days

The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is January (8.3 days).

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Average snowfall in September
Plainfield, CT

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

The month with the highest snowfall is March (3.62").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
Plainfield, CT

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

The month with the highest number of snowfall days is February (7.7 days).
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
Plainfield, CT

Average daylight in September / Average sunshine in September - Plainfield, 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: 8.5h

Months with the most sunshine are July and August (Average sunshine: 10.3h).
The month with the least sunshine is February (Average sunshine: 4.8h).

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Average sunshine days in September
Plainfield, CT

Average sunshine days in September - Plainfield, CT
  • Average sunshine days in September: 14.5 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (10.3 days).

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Average UV index in September
Plainfield, CT

Average UV index in September - Plainfield, CT
  • Average UV index in September: 4

Months with the highest UV index are June, July and August (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
Plainfield, CT

Average cloud cover in September - Plainfield, CT
  • Average cloud cover in September: 37

The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in September
Plainfield, CT

Average visibility in September - Plainfield, CT
  • Average visibility in September: 6mi

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

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