January weather forecast
South Windsor, CT

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Weather in January

January, the same as December, is another cold winter month in South Windsor, Connecticut, with temperature in the range of an average low of 21.2°F (-6°C) and an average high of 32.9°F (0.5°C).

Temperature

In South Windsor, the month of January is known for its lowest average temperatures, reaching a high of 32.9°F (0.5°C) and a low of 21.2°F (-6°C).

Humidity

In South Windsor, the average relative humidity in January is 76%.

Rainfall

In January, the rain falls for 10 days. Throughout January, 2.28" (58mm) of precipitation is accumulated. Throughout the year, there are 164.8 rainfall days, and 31.77" (807mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. In South Windsor, during January, snow falls for 7.8 days and regularly aggregates up to 3.39" (86mm) of snow. In South Windsor, during the entire year, snow falls for 31.6 days and aggregates up to 17.13" (435mm) of snow.

Daylight

The average length of the day in January is 9h and 33min.
On the first day of the month, sunrise is at 7:17 am and sunset at 4:29 pm. On the last day of January, sunrise is at 7:03 am and sunset at 5:03 pm EST.

Sunshine

The average sunshine in January is 5.1h.

UV index

The months with the lowest UV index in South Windsor are January through March, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the average person.
Note: A daily maximum UV index of 2 in January translates into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Enhance your sun protection with tightly woven, yet airy clothing. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Updated: Aug 24, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the coldest?

South Windsor's coldest weather arrives in January, when temperatures average a high of 32.9°F (0.5°C) and a low of 21.2°F (-6°C).

How cold is January?

South Windsor in January has an average high-temperature of 32.9°F (0.5°C) and an average low-temperature of 21.2°F (-6°C).

What is the average humidity in January?

In South Windsor, the average relative humidity in January is 76%.

How many days does it rain in January?

In South Windsor, Connecticut, in January, during 10 rainfall days, 2.28" (58mm) of precipitation is typically accumulated.

How much does it snow in South Windsor in January?

In South Windsor, in January, during 7.8 snowfall days, 3.39" (86mm) of snow is typically accumulated.

What is the average length of the day in January?

In South Windsor, the average day length in January is 9h and 33min.

When are sunrise and sunset in January?

On the first day of January, sunrise is at 7:17 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 5:03 pm EST.

How many hours of sunshine does South Windsor have in January?

In South Windsor, the average sunshine duration in January is 5.1h.

What is the month with the lowest UV index?

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2.

What is the UV index reading in January?

In South Windsor, the average daily maximum UV index in January is 2. A UV Index value of 2, and less, symbolizes a low health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
South Windsor, CT

Average temperature in January - South Windsor, CT
  • Average high temperature in January: 32.9°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (32.9°F).

  • Average low temperature in January: 21.2°F

The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).

Average pressure in January
South Windsor, CT

Average pressure in January - South Windsor, CT
  • Average pressure in January: 30.03"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 January
South Windsor, CT

Average wind speed in January - South Windsor, CT
  • Average wind speed in January: 8.1mph

The windiest months (with the highest average wind speed) are January and March (8.1mph).
The calmest month (with the lowest average wind speed) is August (5.2mph).

Average humidity in January
South Windsor, CT

Average humidity in January - South Windsor, CT
  • Average humidity in January: 76%

The month with the highest relative humidity is February (80%).
The month with the lowest relative humidity is April (71%).

Average rainfall in January
South Windsor, CT

Average rainfall in January - South Windsor, CT
  • Average rainfall in January: 2.28"

The wettest month (with the highest rainfall) is December (3.27").
The driest month (with the least rainfall) is September (1.77").

Average rainfall days in January
South Windsor, CT

Average rainfall days in January - South Windsor, CT
  • Average rainfall days in January: 10 days

The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (10 days).

Average snowfall in January
South Windsor, CT

Average snowfall in January - South Windsor, CT
  • Average snowfall in January: 3.39"

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

Average snowfall days in January
South Windsor, CT

Average snowfall days in January - South Windsor, CT
  • Average snowfall days in January: 7.8 days

The month with the highest number of snowfall days is February (8.5 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in January /
Average sunshine in January
South Windsor, CT

Average daylight in January / Average sunshine in January - South Windsor, CT
  • Average daylight in January: 9h 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 January: 5h and 1min

The months with the most sunshine are July and August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days in January
South Windsor, CT

Average sunshine days in January - South Windsor, CT
  • Average sunshine days in January: 17 days

The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is June (11.2 days).

Average UV index in January
South Windsor, CT

Average UV index in January - South Windsor, CT
  • Average UV index in January: 2

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in January
South Windsor, CT

Average cloud cover in January - South Windsor, CT
  • Average cloud cover in January: 45

The month with the most cloud cover is February (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 33).

Average visibility in January
South Windsor, CT

Average visibility in January - South Windsor, CT
  • Average visibility in January: 6mi

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

South Windsor, Connecticut, USA

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