September weather forecast
Middletown, CT

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Weather in September

The autumn equinox arrives in September, reflecting a significant change in Middletown, Connecticut’s weather. As the leaves begin to change colour, the temperatures also start to drop gradually, symbolising the end of summer. The city, while still reveling in the glow of the receding summer sun, starts to experience cooler and shorter days. The decrease in daylight hours is noticeable, as the sun begins to set earlier each day. September witnesses a significant drop in the highest temperature to 73.6°F (23.1°C), while the lowest levels out at 56.3°F (13.5°C).

Temperature

September in Middletown witnesses a gentle descent in average high-temperature, descending from August's 81°F (27.2°C) to a still warm 73.6°F (23.1°C). September brings with it a nighttime average temperature of 56.3°F (13.5°C) in Middletown.

Humidity

The average relative humidity in September is 77%.

Rainfall

The month with the least rainfall is September, when the rain falls for 11.9 days and typically collects 1.89" (48mm) of precipitation.

Snowfall

June through October are months without snowfall in Middletown.

Daylight

In Middletown, the average length of the day in September is 12h and 28min.
On the first day of the month, sunrise is at 6:17 am and sunset at 7:23 pm. On the last day of September, in Middletown, sunrise is at 6:47 am and sunset at 6:33 pm EDT.

Sunshine

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

UV index

The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: A maximum high daily UV index of 4 during September translates into the following directions:
Take necessary precautions - Suggestions to elude sunburn are provided. Avoiding the Sun during its peak radiation time around midday is a healthy practice. A hat with a generous brim can prevent nearly 50% of UV rays from reaching your eyes.
Updated: Feb 10, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the average September temperature in Middletown?

An average high-temperature, in September, in Middletown, is 73.6°F (23.1°C) and the average low-temperature is 56.3°F (13.5°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which calculates the temperature value influenced by the moisture in the air, in August is evaluated at 86°F (30°C).

What is the average humidity in September in Middletown?

The average relative humidity in September is 77%.

What is the driest month in Middletown?

September is the month with the least rainfall in Middletown. Rain falls for 11.9 days and accumulates 1.89" (48mm) of precipitation.

How many days does it rain in September in Middletown?

In Middletown, Connecticut, during September, the rain falls for 11.9 days and regularly aggregates up to 1.89" (48mm) of precipitation.

When it does not snow in Middletown?

June through October are months without snowfall.

What is the average length of the day in September in Middletown?

The average day length in September in Middletown, Connecticut, is 12h and 28min.

When is the sunrise / sunset in September in Middletown?

In September, on the first day of the month, sunrise is at 6:17 am and sunset at 7:23 pm. On the last day of the month, sunrise is at 6:47 am and sunset at 6:33 pm EDT.

How many hours of sunshine does Middletown have in September?

In Middletown, the average sunshine duration in September is 8.5h.

What is the UV index reading in September in Middletown?

In Middletown, Connecticut, the average daily maximum UV index in September is 4. A UV Index estimate of 3 to 5 represents a medium hazard to health from unprotected exposure to 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
Middletown, CT

Average temperature in September - Middletown, CT
  • Average high temperature in September: 73.6°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (34°F).

  • Average low temperature in September: 56.3°F

The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).

Average pressure in September
Middletown, CT

Average pressure in September - Middletown, CT
  • Average pressure in September: 30.05"Hg

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

Average wind speed in September
Middletown, CT

Average wind speed in September - Middletown, CT
  • Average wind speed in September: 6mph

The windiest months (with the highest average wind speed) are January and March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

Average humidity in September
Middletown, CT

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

The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is April (71%).

Average rainfall in September
Middletown, CT

Average rainfall in September - Middletown, CT
  • Average rainfall in September: 1.89"

The wettest month (with the highest rainfall) is December (3.66").
The driest month (with the least rainfall) is September (1.89").

Average rainfall days in September
Middletown, CT

Average rainfall days in September - Middletown, CT
  • Average rainfall days in September: 11.9 days

The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is January (9.1 days).

Average snowfall in September
Middletown, CT

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

The month with the highest snowfall is March (4.13").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in September
Middletown, CT

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

The month with the highest number of snowfall days is February (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September /
Average sunshine in September
Middletown, CT

Average daylight in September / Average sunshine in September - Middletown, 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 3min

The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in September
Middletown, CT

Average sunshine days in September - Middletown, CT
  • Average sunshine days in September: 14.7 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (11.3 days).

Average UV index in September
Middletown, CT

Average UV index in September - Middletown, 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).

Average cloud cover in September
Middletown, CT

Average cloud cover in September - Middletown, 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 33).

Average visibility in September
Middletown, CT

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

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

Middletown, Connecticut, USA

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