September weather forecast
Andover, CT

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Weather in September

The first month of the autumn, September, is still a pleasant month in Andover, Connecticut, with an average temperature fluctuating between 73.2°F (22.9°C) and 55.4°F (13°C).

Temperature

With the onset of September, Andover's average high-temperature slightly adjusts, moderately receding from August's moderately hot 80.2°F (26.8°C) to a pleasant 73.2°F (22.9°C). During September, the temperature tends to dip to an average of 55.4°F (13°C) at night.

Humidity

In Andover, the average relative humidity in September is 78%.

Rainfall

September is the month with the least rainfall. Rain falls for 13.5 days and accumulates 1.73" (44mm) of precipitation.

Snowfall

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

Daylight

In September, the average length of the day is 12h and 28min.
On the first day of September, sunrise is at 6:16 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:32 pm EDT.

Sunshine

In Andover, the average sunshine in September is 8.6h.

UV index

The average daily maximum UV index in September is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unprotected exposure to Sun's UV rays for the ordinary person.
Note: The UV index of 4 in September translates into these instructions:
Guard yourself - Precautionary measures against sun damage are advocated. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays.
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Frequently asked questions

What is the temperature in September in Andover?

Andover in September has an average high-temperature of 73.2°F (22.9°C) and an average low-temperature of 55.4°F (13°C). In July, the average heat index (a.k.a. 'felt air temperature', 'real feel'), which calculates the temperature value influenced by the moisture in the air, is computed to be 87.8°F (31°C).

What is the average humidity in September in Andover?

In Andover, Connecticut, the average relative humidity in September is 78%.

What is the driest month in Andover?

The month with the least rainfall in Andover is September, when the rain falls for 13.5 days and typically collects 1.73" (44mm) of precipitation.

How much does it rain in Andover in September?

In September, in Andover, the rain falls for 13.5 days. Throughout September, 1.73" (44mm) of precipitation is accumulated.

When it does not snow in Andover?

June through October are months without snowfall in Andover.

How many hours of daylight does Andover have in September?

In Andover, Connecticut, the average day length in September is 12h and 28min.

What time are sunrise and sunset in September in Andover?

On the first day of September in Andover, Connecticut, sunrise is at 6:16 am and sunset at 7:22 pm. On the last day of the month, sunrise is at 6:46 am and sunset at 6:32 pm EDT.

How many hours of sunshine does Andover have in September?

In Andover, Connecticut, the average sunshine duration in September is 8.6h.

What is the UV index intensity in September in Andover?

In September, the average daily maximum UV index in Andover, Connecticut, is 4. A UV Index value of 3 to 5 symbolizes a moderate health threat from exposure to Sun's UV rays.
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
Andover, CT

Average temperature in September - Andover, CT
  • Average high temperature in September: 73.2°F

The warmest month (with the highest average high temperature) is July (81.9°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in September: 55.4°F

The month with the highest average low temperature is July (63°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

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Average pressure in September
Andover, CT

Average pressure in September - Andover, 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
Andover, CT

Average wind speed in September - Andover, CT
  • Average wind speed in September: 6.2mph

The windiest months (with the highest average wind speed) are January and March (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.6mph).

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Average humidity in September
Andover, CT

Average humidity in September - Andover, CT
  • Average humidity in September: 78%

The months with the highest relative humidity are February and October (79%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in September
Andover, CT

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

The wettest month (with the highest rainfall) is December (3.46").
The driest month (with the least rainfall) is September (1.73").

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Average rainfall days in September
Andover, CT

Average rainfall days in September - Andover, CT
  • Average rainfall days in September: 13.5 days

The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is January (9.1 days).

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Average snowfall in September
Andover, CT

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

The month with the highest snowfall is March (4.41").
The months with the least snowfall are June, July, August, September and October (0").

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Average snowfall days in September
Andover, CT

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

The month with the highest number of snowfall days is January (8.3 days).
The 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
Andover, CT

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

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

  • Average sunshine in September: 8h and 4min

The month with the most sunshine is August (Average sunshine: 10h and 18min).
The month with the least sunshine is December (Average sunshine: 4h and 42min).

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Average sunshine days in September
Andover, CT

Average sunshine days in September - Andover, CT
  • Average sunshine days in September: 14.6 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (10.8 days).

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Average UV index in September
Andover, CT

Average UV index in September - Andover, 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
Andover, CT

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

The months with the most cloud cover are February, March, May and December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in September
Andover, CT

Average visibility in September - Andover, CT
  • Average visibility in September: 5mi

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

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Andover, Connecticut, USA

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