January weather forecast
Grantville, CT

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Weather in January

January, like December, is another subzero cold winter month in Grantville, Connecticut, with an average temperature varying between 30.4°F (-0.9°C) and 18°F (-7.8°C).

Temperature

January, with average temperatures reaching a high of 30.4°F (-0.9°C) and a low of 18°F (-7.8°C), is the coldest month.

Humidity

The average relative humidity in January is 79%.

Rainfall

In January, the rain falls for 7.3 days. Throughout January, 2.24" (57mm) of precipitation is accumulated. Throughout the year, in Grantville, Connecticut, there are 157.2 rainfall days, and 33.31" (846mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Grantville are January through May, October through December. In Grantville, in January, snow falls for 11.1 days, with typically accumulated 5.12" (130mm) of snow. In Grantville, during the entire year, snow falls for 45.3 days and aggregates up to 25.63" (651mm) of snow.

Daylight

The average length of the day in January in Grantville is 9h and 32min.
On the first day of the month, sunrise is at 7:20 am and sunset at 4:31 pm. On the last day of January, in Grantville, sunrise is at 7:06 am and sunset at 5:05 pm EST.

Sunshine

The average sunshine in January is 4.6h.

UV index

The months with the lowest UV index 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 average individuals.
Note: In January, a regular UV index of 2 translates into these guidelines:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. It's recommended to limit sun exposure when its radiation is at its peak during midday. It's wise to wear UVA and UVB-blocking sunglasses when the sun shines brightly. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What time of the year is the coldest in Grantville?

The coldest period in Grantville is January, when temperatures fluctuate between an average high of 30.4°F (-0.9°C) and a low of 18°F (-7.8°C).

How cold is January in Grantville?

The average high-temperature, in January, in Grantville, is 30.4°F (-0.9°C), while the average low-temperature is 18°F (-7.8°C).

What is the average humidity in January in Grantville?

The average relative humidity in January is 79%.

How many days does it rain in January in Grantville?

In Grantville, Connecticut, in January, during 7.3 rainfall days, 2.24" (57mm) of precipitation is typically accumulated.

How many days does it snow in January in Grantville?

In Grantville, in January, during 11.1 snowfall days, 5.12" (130mm) of snow is typically accumulated.

What is the average length of the day in January in Grantville?

In Grantville, the average day length in January is 9h and 32min.

When is the sunrise / sunset in January in Grantville?

On the first day of January in Grantville, Connecticut, sunrise is at 7:20 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 5:05 pm EST.

How many hours of sunshine does Grantville have in January?

In Grantville, Connecticut, the average sunshine duration in January is 4.6h.

What is the month with the lowest UV index in Grantville?

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

What is the UV index reading in January in Grantville?

In Grantville, the average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's 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
Grantville, CT

Average temperature in January - Grantville, CT
  • Average high temperature in January: 30.4°F

The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (30.4°F).

  • Average low temperature in January: 18°F

The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (18°F).

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Average pressure in January
Grantville, CT

Average pressure in January - Grantville, 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).

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Average wind speed in January
Grantville, CT

Average wind speed in January - Grantville, CT
  • Average wind speed in January: 8.6mph

The windiest month (with the highest average wind speed) is January (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.2mph).

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Average humidity in January
Grantville, CT

Average humidity in January - Grantville, CT
  • Average humidity in January: 79%

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (74%).

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Average rainfall in January
Grantville, CT

Average rainfall in January - Grantville, CT
  • Average rainfall in January: 2.24"

The wettest months (with the highest rainfall) are October and December (3.31").
The driest month (with the least rainfall) is September (2.09").

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Average rainfall days in January
Grantville, CT

Average rainfall days in January - Grantville, CT
  • Average rainfall days in January: 7.3 days

The month with the highest number of rainy days is May (16.9 days).
The month with the least rainy days is February (7.1 days).

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Average snowfall in January
Grantville, CT

Average snowfall in January - Grantville, CT
  • Average snowfall in January: 5.12"

The month with the highest snowfall is February (6.38").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Grantville, CT

Average snowfall days in January - Grantville, CT
  • Average snowfall days in January: 11.1 days

The month with the highest number of snowfall days is February (11.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
Grantville, CT

Average daylight in January / Average sunshine in January - Grantville, 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: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).

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Average sunshine days in January
Grantville, CT

Average sunshine days in January - Grantville, CT
  • Average sunshine days in January: 16.8 days

The month with the most sunshine days is January (16.8 days).
The month with the least sunshine days is June (11.4 days).

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Average UV index in January
Grantville, CT

Average UV index in January - Grantville, CT
  • Average UV index in January: 2

The month with the highest UV index is June (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 January
Grantville, CT

Average cloud cover in January - Grantville, CT
  • Average cloud cover in January: 50

The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is August (Cloud cover 37).

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Average visibility in January
Grantville, CT

Average visibility in January - Grantville, CT
  • Average visibility in January: 5mi

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

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Grantville, Connecticut, USA

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