January weather forecast
Bolton, CT

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Grass, brown sand, and trees on an empty beach in Bolton, Connecticut, overlooking the blue waters far out
Grass, brown sand, and trees on an empty beach in Bolton, Connecticut, overlooking the blue waters far out

Weather in January

Notorious for its chilly winds, January in Bolton, Connecticut, USA presents itself with a classic winter tableau. The relatively high relative humidity of 76% often gives the cool air a biting edge, turning the chilly weather into freezing conditions sometimes. The temperatures often dip to lows around 21.2°F (-6°C) and only manage to reach highs of about 32.9°F (0.5°C), emphasizing the severity of the winter conditions. Even sunlight seems elusive during this month, as the days are short and often shrouded in clouds. Overall, January is a month of wintry whites and frosty breaths, with weather conditions that can test the resolve of even the hardiest weather enthusiasts.

Temperature

January is the month when Bolton experiences its coldest temperatures, averaging a high of 32.9°F (0.5°C) and a low of 21.2°F (-6°C).

Humidity

In Bolton, Connecticut, the average relative humidity in January is 76%.

Rainfall

In Bolton, during January, the rain falls for 10 days and regularly aggregates up to 2.28" (58mm) of precipitation. Throughout the year, in Bolton, 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 Bolton, Connecticut, in January, snow falls for 7.8 days, with typically accumulated 3.39" (86mm) of snow. In Bolton, during the entire year, snow falls for 31.6 days and aggregates up to 17.13" (435mm) of snow.

Daylight

In January, the average length of the day in Bolton, Connecticut, is 9h and 34min.
On the first day of January, sunrise is at 7:16 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.

Sunshine

The average sunshine in January is 5.1h.

UV index

The months with the lowest UV index in Bolton, Connecticut, are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for ordinary individuals.
Note: The UV index of 2 during January leads to these advisories:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. To cut down UV radiation exposure by about half, sport a wide-brim hat. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
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Frequently asked questions

What are the coldest months in Bolton?

Bolton's January weather reaches an average high of 32.9°F (0.5°C) and an average low of 21.2°F (-6°C), making it the coldest month.

How cold is January in Bolton?

In Bolton, in January, the average high-temperature is 32.9°F (0.5°C), and the average low-temperature is 21.2°F (-6°C).

What is the average humidity in January in Bolton?

In January, the average relative humidity in Bolton, Connecticut, is 76%.

How many days does it rain in January in Bolton?

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

How much does it snow in Bolton in January?

In Bolton, Connecticut, during January, snow falls for 7.8 days and regularly aggregates up to 3.39" (86mm) of snow.

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

In Bolton, Connecticut, the average day length in January is 9h and 34min.

What time are sunrise and sunset in January in Bolton?

On the first day of January in Bolton, Connecticut, sunrise is at 7:16 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 Bolton have in January?

The average sunshine duration in January is 5.1h.

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

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

What is the UV index intensity in January in Bolton?

In January, the average daily maximum UV index in Bolton, Connecticut, is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
38.7°F 3.7°C
32.9°F 0.5°C
36°F 2.2°C
Average low temperature
28°F -2.2°C
21.2°F -6°C
21.6°F -5.8°C
Average pressure
30.05" 763mmHg
30.03" 763mmHg
30.01" 762mmHg
Average wind speed
7.8mph 12.6km/h
8.1mph 13km/h
8mph 12.9km/h
Average max. wind speed
8.3mph 13.4km/h
8.7mph 14km/h
8.5mph 13.7km/h
Average wind speed gusts
12.3mph 19.8km/h
12.8mph 20.6km/h
12.6mph 20.3km/h
Average humidity
78%
76%
80%
Average rainfall
3.27" 83mm
2.28" 58mm
2.32" 59mm
Average rainfall days
11.8
10
10.3
Average snowfall
3.15" 80mm
3.39" 86mm
4.8" 122mm
Average snowfall days
5.8
7.8
8.5
Average daylight
9h 1min
9h 4min
10h 4min
Average sunshine
4h 5min
5h 1min
4h 4min
Average sunshine days
15.1
17
12.9
Average UV index
2
2
2
Average cloud cover
48%
45%
49%
Average visibility
6mi 9.7km
6mi 9.7km
5mi 8km

Average temperature in January
Bolton, CT

Average temperature in January - Bolton, 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).

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Average pressure in January
Bolton, CT

Average pressure in January - Bolton, 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
Bolton, CT

Average wind speed in January - Bolton, 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).

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Average humidity in January
Bolton, CT

Average humidity in January - Bolton, 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%).

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Average rainfall in January
Bolton, CT

Average rainfall in January - Bolton, 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").

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Average rainfall days in January
Bolton, CT

Average rainfall days in January - Bolton, 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).

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Average snowfall in January
Bolton, CT

Average snowfall in January - Bolton, 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").

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Average snowfall days in January
Bolton, CT

Average snowfall days in January - Bolton, 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).

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

Average daylight in January / Average sunshine in January - Bolton, CT
  • Average daylight in January: 9h and 4min

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).

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Average sunshine days in January
Bolton, CT

Average sunshine days in January - Bolton, 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).

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Average UV index in January
Bolton, CT

Average UV index in January - Bolton, 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).

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Average cloud cover in January
Bolton, CT

Average cloud cover in January - Bolton, 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).

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Average visibility in January
Bolton, CT

Average visibility in January - Bolton, 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).

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Bolton, Connecticut, USA

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