September weather forecast and climate
Hadlyme, CT

Weather in September

September, the first month of the autumn, in Hadlyme, is also an agreeable month, with average temperature ranging between min 59.5°F (15.3°C) and max 72.3°F (22.4°C).

Temperature

In Hadlyme, the average high-temperature marginally drops, from a warm 78.6°F (25.9°C) in August, to a pleasant 72.3°F (22.4°C). The average low-temperature, in Hadlyme, is 59.5°F (15.3°C).

Humidity

The average relative humidity in September is 77%.

Rainfall

The month with the least rainfall in Hadlyme is September when the rain falls for 13 days and typically collects 1.93" (49mm) of precipitation.

Snowfall

June through October are months without snowfall.

Daylight

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

Sunshine

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

UV index

In September, the average daily maximum UV index in Hadlyme, Connecticut, is 4. A UV Index value of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 4 interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. 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 temperature in September in Hadlyme?

In Hadlyme, in September, the average high-temperature is 72.3°F (22.4°C), and the average low-temperature is 59.5°F (15.3°C).

What is the average humidity in September in Hadlyme?

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

How many days does it rain in September in Hadlyme?

In Hadlyme, Connecticut, in September, it is raining for 13 days, with typically 1.93" (49mm) of accumulated precipitation.

What is the driest month in Hadlyme?

September is the month with the least rainfall. Rain falls for 13 days and accumulates 1.93" (49mm) of precipitation.

When it does not snow in Hadlyme?

In Hadlyme snow does not fall in June through October.

How many hours of daylight does Hadlyme have in September?

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

How many hours of sunshine does Hadlyme have in September?

In Hadlyme, Connecticut, the average sunshine in September is 8.9h.

What is the UV index reading in September in Hadlyme?

The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate health threat from unprotected exposure to the UV radiation.

Average temperature in September
Hadlyme, CT

Average temperature in September - Hadlyme, CT
  • Average high temperature in September: 72.3°F

The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is January (35.2°F).

  • Average low temperature in September: 59.5°F

The month with the highest average low temperature is July (66.6°F).
The coldest month (with the lowest average low temperature) is January (25.5°F).

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Average pressure in September
Hadlyme, CT

Average pressure in September - Hadlyme, 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
Hadlyme, CT

Average wind speed in September - Hadlyme, CT
  • Average wind speed in September: 8.1mph

The windiest month (with the highest average wind speed) is January (10.9mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).

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Average humidity in September
Hadlyme, CT

Average humidity in September - Hadlyme, CT
  • Average humidity in September: 77%

Months with the highest relative humidity are May, June and July (78%).
The month with the lowest relative humidity is April (73%).

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Average rainfall in September
Hadlyme, CT

Average rainfall in September - Hadlyme, CT
  • Average rainfall in September: 1.93"

The wettest month (with the highest rainfall) is December (3.66").
The driest month (with the least rainfall) is September (1.93").

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Average rainfall days in September
Hadlyme, CT

Average rainfall days in September - Hadlyme, CT
  • Average rainfall days in September: 13 days

The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is January (9 days).

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Average snowfall in September
Hadlyme, CT

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

The month with the highest snowfall is March (2.76").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
Hadlyme, CT

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

The month with the highest number of snowfall days is February (7 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
Hadlyme, CT

Average daylight in September / Average sunshine in September - Hadlyme, CT
  • Average daylight in September: 12.5h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in September: 8.9h

The month with the most sunshine is August (Average sunshine: 10.6h).
Months with the least sunshine are February and December (Average sunshine: 4.8).

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Average sunshine days in September
Hadlyme, CT

Average sunshine days in September - Hadlyme, CT
  • Average sunshine days in September: 14.2 days

The month with the most sunshine days is November (17.1 days).
The month with the least sunshine days is July (11.7 days).

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Average UV index in September
Hadlyme, CT

Average UV index in September - Hadlyme, 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
Hadlyme, CT

Average cloud cover in September - Hadlyme, CT
  • Average cloud cover in September: 33

Months with the most cloud cover are February and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in September
Hadlyme, CT

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

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

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