September weather forecast
Roxbury, CT

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Weather in September

September, the first month of the autumn in Roxbury, is still a pleasant month, with an average temperature fluctuating between 73.2°F (22.9°C) and 55.2°F (12.9°C).

Temperature

The beginning of September brings a slight decrease in the average high-temperature, transitioning from a warm 80.4°F (26.9°C) in August to a pleasant 73.2°F (22.9°C). During September, Roxbury experiences an average low-temperature of 55.2°F (12.9°C) at night.

Humidity

In Roxbury, the average relative humidity in September is 79%.

Rainfall

September is the month with the least rainfall. Rain falls for 13.6 days and accumulates 2.28" (58mm) of precipitation.

Snowfall

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

Daylight

The average length of the day in September in Roxbury is 12h and 28min.
On the first day of September, sunrise is at 6:20 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:36 pm EDT.

Sunshine

In September, the average sunshine is 8.4h.

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: An average UV index of 4 in September transforms into this advice:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. The solar radiation around mid-day is intense; avoid the Sun and stay safe. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays.
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 Roxbury?

In Roxbury, in September, the average high-temperature is 73.2°F (22.9°C), and the average low-temperature is 55.2°F (12.9°C). In July, the average heat index (a.k.a. 'feels like', 'apparent temperature'), which combines relative humidity and air temperature, is appraised at 89.6°F (32°C).

What is the average humidity in September in Roxbury?

In September, the average relative humidity in Roxbury, Connecticut, is 79%.

What is the driest month in Roxbury?

September is the month with the least rainfall in Roxbury, Connecticut. Rain falls for 13.6 days and accumulates 2.28" (58mm) of precipitation.

How many days does it rain in September in Roxbury?

In Roxbury, Connecticut, during September, the rain falls for 13.6 days and regularly aggregates up to 2.28" (58mm) of precipitation.

When it does not snow in Roxbury?

June through October are months without snowfall in Roxbury.

How many hours of daylight does Roxbury have in September?

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

When are sunrise and sunset in September in Roxbury?

On the first day of September, sunrise is at 6:20 am and sunset at 7:25 pm. On the last day of the month, sunrise is at 6:49 am and sunset at 6:36 pm EDT.

How long on average sun shines in September in Roxbury?

In September, the average sunshine duration in Roxbury is 8.4h.

How high is the UV index in September in Roxbury?

The average daily maximum UV index in September in Roxbury is 4. A UV Index estimate of 3 to 5 represents a moderate health threat 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
Roxbury, CT

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

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (33.1°F).

  • Average low temperature in September: 55.2°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21.4°F).

Average pressure in September
Roxbury, CT

Average pressure in September - Roxbury, CT
  • Average pressure in September: 30.06"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
Roxbury, CT

Average wind speed in September - Roxbury, CT
  • Average wind speed in September: 5.6mph

The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest month (with the lowest average wind speed) is August (5mph).

Average humidity in September
Roxbury, CT

Average humidity in September - Roxbury, CT
  • Average humidity in September: 79%

The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (72%).

Average rainfall in September
Roxbury, CT

Average rainfall in September - Roxbury, CT
  • Average rainfall in September: 2.28"

The wettest month (with the highest rainfall) is December (3.9").
The driest month (with the least rainfall) is September (2.28").

Average rainfall days in September
Roxbury, CT

Average rainfall days in September - Roxbury, CT
  • Average rainfall days in September: 13.6 days

The month with the highest number of rainy days is July (18.5 days).
The month with the least rainy days is January (9.5 days).

Average snowfall in September
Roxbury, CT

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

The month with the highest snowfall is February (4.8").
The months with the least snowfall are June, July, August, September and October (0").

Average snowfall days in September
Roxbury, CT

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

The month with the highest number of snowfall days is February (9.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in September / Average sunshine in September - Roxbury, 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 2min

The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

Average sunshine days in September
Roxbury, CT

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

The month with the most sunshine days is November (17 days).
The months with the least sunshine days are May and June (10.3 days).

Average UV index in September
Roxbury, CT

Average UV index in September - Roxbury, 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
Roxbury, CT

Average cloud cover in September - Roxbury, CT
  • Average cloud cover in September: 40

The month with the most cloud cover is February (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 36).

Average visibility in September
Roxbury, CT

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

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

Roxbury, Connecticut, USA

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