September weather forecast
Hadlyme, CT

Weather in September

The first month of the autumn, September, is still a pleasant month in Hadlyme, Connecticut, with an average temperature fluctuating between 59.5°F (15.3°C) and 72.3°F (22.4°C).

Temperature

In Hadlyme, the average high-temperature in September slightly decreases from a warm 78.6°F (25.9°C) in August to an agreeable 72.3°F (22.4°C). In Hadlyme, the average low-temperature is 59.5°F (15.3°C).

Humidity

The average relative humidity in September in Hadlyme is 77%.

Rainfall

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

Snowfall

In Hadlyme, snow does not fall in June through October.

Daylight

In Hadlyme, Connecticut, the average length of the day in September is 12h and 28min.
On the first day of September in Hadlyme, sunrise is at 6:15 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:45 am and sunset at 6:33 pm EDT.

Sunshine

The average sunshine in September in Hadlyme is 8.9h.

UV index

The average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium health hazard from unsafe exposure to UV radiation for ordinary individuals.
Note: The average daily UV index of 4 in September transform into the following instructions:
Take precautions - Protection against sunburn is recommended. 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 the 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 Hadlyme?

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

What is the average humidity in September in Hadlyme?

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

What is the driest month in Hadlyme?

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

How many days does it rain in September in Hadlyme?

In Hadlyme, in September, it is raining for 13 days, with typically 1.93" (49mm) of accumulated 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 Hadlyme, Connecticut, the average day length in September is 12h and 28min.

When is the sunrise / sunset in September in Hadlyme?

In September, on the first day of the month, sunrise is at 6:15 am and sunset at 7:23 pm. On the last day of the month, in Hadlyme, sunrise is at 6:45 am and sunset at 6:33 pm EDT.

How many hours of sunshine does Hadlyme have in September?

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

How high is the UV index in September in Hadlyme?

In Hadlyme, Connecticut, the average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium health risk from exposure to the Sun's UV radiation.
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
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"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
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%

The 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").
The 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).
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
Hadlyme, CT

Average daylight in September / Average sunshine in September - Hadlyme, CT
  • Average daylight in September: 12h and 3min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in September: 8h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 36min).
The months with the least sunshine are February and December (Average sunshine: 4h and 48min).

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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

The months with the highest UV index are June, July and August (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
Hadlyme, CT

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

The 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

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

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