September weather forecast
Middle Haddam, CT

Weather in September

The first month of the autumn, September, is still a warm month in Middle Haddam, Connecticut, with average temperature fluctuating between 56.7°F (13.7°C) and 73.4°F (23°C).

Temperature

In September, the average high-temperature marginally drops, from a warm 80.4°F (26.9°C) in August, to a still moderately hot 73.4°F (23°C). In September, in Middle Haddam, the average low-temperature is 56.7°F (13.7°C).

Humidity

In September, the average relative humidity in Middle Haddam, Connecticut, is 77%.

Rainfall

The month with the least rainfall is September when the rain falls for 8.5 days and typically collects 0.39" (10mm) of precipitation.

Snowfall

In Middle Haddam snow does not fall in June through October.

Daylight

In Middle Haddam, the average length of the day is 12.5h.

Sunshine

The average sunshine in September is 8.3h.

UV index

In Middle Haddam, the average daily maximum UV index is 4. A UV Index value of 3 to 5 symbolizes a medium health hazard from the exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 4 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. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes.
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FAQ

What is the average humidity in September in Middle Haddam?

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

What is the driest month in Middle Haddam?

The month with the least rainfall in Middle Haddam is September when the rain falls for 8.5 days and typically collects 0.39" (10mm) of precipitation.

How many days does it rain in September in Middle Haddam?

In September, the rain falls for 8.5 days. Throughout September, 0.39" (10mm) of precipitation is accumulated.

When it does not snow in Middle Haddam?

In Middle Haddam, Connecticut, snow does not fall in June through October.

How many hours of daylight does Middle Haddam have in September?

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

How long on average sun shines in September in Middle Haddam?

In Middle Haddam, Connecticut, the average sunshine in September is 8.3h.

How high is the UV index in September in Middle Haddam?

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

Average temperature in September
Middle Haddam, CT

Average temperature in September - Middle Haddam, CT
  • Average high temperature in September: 73.4°F

The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (34.7°F).

  • Average low temperature in September: 56.7°F

The month with the highest average low temperature is July (63.9°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).

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Average pressure in September
Middle Haddam, CT

Average pressure in September - Middle Haddam, 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
Middle Haddam, CT

Average wind speed in September - Middle Haddam, CT
  • Average wind speed in September: 6.3mph

The windiest months (with the highest average wind speed) are January and March (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.7mph).

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Average humidity in September
Middle Haddam, CT

Average humidity in September - Middle Haddam, CT
  • Average humidity in September: 77%

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in September
Middle Haddam, CT

Average rainfall in September - Middle Haddam, CT
  • Average rainfall in September: 0.39"

The wettest month (with the highest rainfall) is July (1.18").
The driest month (with the least rainfall) is September (0.39").

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Average rainfall days in September
Middle Haddam, CT

Average rainfall days in September - Middle Haddam, CT
  • Average rainfall days in September: 8.5 days

The month with the highest number of rainy days is July (12.7 days).
The month with the least rainy days is January (5.9 days).

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Average snowfall in September
Middle Haddam, CT

Average snowfall in September - Middle Haddam, CT
  • Average snowfall in September: 0"

The month with the highest snowfall is March (1.14").
Months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
Middle Haddam, CT

Average snowfall days in September - Middle Haddam, CT
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (5.2 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
Middle Haddam, CT

Average daylight in September / Average sunshine in September - Middle Haddam, 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: 8.3h

Months with the most sunshine are July and August (Average sunshine: 10.1h).
The month with the least sunshine is February (Average sunshine: 4.5h).

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Average sunshine days in September
Middle Haddam, CT

Average sunshine days in September - Middle Haddam, CT
  • Average sunshine days in September: 19.1 days

The month with the most sunshine days is November (20.9 days).
The month with the least sunshine days is July (16.3 days).

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Average UV index in September
Middle Haddam, CT

Average UV index in September - Middle Haddam, 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
Middle Haddam, CT

Average cloud cover in September - Middle Haddam, CT
  • Average cloud cover in September: 39

Months with the most cloud cover are February and March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 35).

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Average visibility in September
Middle Haddam, CT

Average visibility in September - Middle Haddam, CT
  • Average visibility in September: 6mi

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

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