January weather forecast and climate
Jamestown, NY

Weather in January

January, the same as December, in Jamestown, New York, is a freezing cold winter month, with average temperature fluctuating between 17.6°F (-8°C) and 28°F (-2.2°C).

Temperature

January is the coldest month, with an average high-temperature of 28°F (-2.2°C) and an average low-temperature of 17.6°F (-8°C).

Humidity

In January, the average relative humidity in Jamestown is 88%.

Rainfall

In Jamestown, it is raining for 6.9 days, with typically 2.2" (56mm) of accumulated precipitation. Throughout the year, there are 163.4 rainfall days, and 27.72" (704mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Jamestown, New York, are January through May, October through December. In Jamestown, during 20.7 snowfall days, 7.05" (179mm) of snow is typically accumulated. Throughout the year, there are 85.6 snowfall days, and 32.91" (836mm) of snow is accumulated.

Daylight

In January, the average length of the day in Jamestown is 9.5h.

Sunshine

January has the least sunshine of the year, with an average of 2.3h of sunshine.

UV index

Months with the lowest UV index in Jamestown are January and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to the Sun's UV rays for the average person.
Note: In January, the average maximum UV index of 1 translate into the following recommendations:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Jamestown?

With an average high-temperature of 28°F (-2.2°C) and an average low-temperature of 17.6°F (-8°C), January is the coldest month in Jamestown.

What is the temperature in January in Jamestown?

The average high-temperature, in January, in Jamestown, is 28°F (-2.2°C), while the average low-temperature is 17.6°F (-8°C).

What is the average humidity in January in Jamestown?

The average relative humidity in January is 88%.

How much does it rain in Jamestown in January?

In Jamestown, in January, during 6.9 rainfall days, 2.2" (56mm) of precipitation is typically accumulated.

How many days does it snow in January in Jamestown?

In Jamestown, during January, snow falls for 20.7 days and regularly aggregates up to 7.05" (179mm) of snow.

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

The average length of the day in January in Jamestown is 9.5h.

What is the month with the least sunshine in Jamestown?

January has the least sunshine of the year in Jamestown, with an average of 2.3h of sunshine.

How long on average sun shines in January in Jamestown?

The average sunshine in January in Jamestown is 2.3h.

When is the lowest UV index in Jamestown?

January and December, with an average maximum UV index of 1, are months with the lowest UV index in Jamestown.

What is the UV index reading in January in Jamestown?

The average daily maximum UV index in January is 1. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to the UV radiation.

Average temperature in January
Jamestown, NY

Average temperature in January - Jamestown, NY
  • Average high temperature in January: 28°F

The warmest month (with the highest average high temperature) is July (75.9°F).
The month with the lowest average high temperature is January (28°F).

  • Average low temperature in January: 17.6°F

The month with the highest average low temperature is July (59.4°F).
The coldest month (with the lowest average low temperature) is January (17.6°F).

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Average pressure in January
Jamestown, NY

Average pressure in January - Jamestown, NY
  • Average pressure in January: 30.07"

The month with the highest atmospheric pressure is November (30.1").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in January
Jamestown, NY

Average wind speed in January - Jamestown, NY
  • Average wind speed in January: 11.1mph

The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is July (6.4mph).

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Average humidity in January
Jamestown, NY

Average humidity in January - Jamestown, NY
  • Average humidity in January: 88%

The month with the highest relative humidity is February (89%).
Months with the lowest relative humidity are April, May and September (81%).

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Average rainfall in January
Jamestown, NY

Average rainfall in January - Jamestown, NY
  • Average rainfall in January: 2.2"

The wettest month (with the highest rainfall) is October (2.83").
The driest month (with the least rainfall) is September (1.81").

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Average rainfall days in January
Jamestown, NY

Average rainfall days in January - Jamestown, NY
  • Average rainfall days in January: 6.9 days

The month with the highest number of rainy days is July (18.3 days).
The month with the least rainy days is January (6.9 days).

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Average snowfall in January
Jamestown, NY

Average snowfall in January - Jamestown, NY
  • Average snowfall in January: 7.05"

The month with the highest snowfall is December (7.68").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Jamestown, NY

Average snowfall days in January - Jamestown, NY
  • Average snowfall days in January: 20.7 days

The month with the highest number of snowfall days is January (20.7 days).
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
Jamestown, NY

Average daylight in January / Average sunshine in January - Jamestown, NY
  • Average daylight in January: 9.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with the shortest days is December (Average daylight: 9.2h).

  • Average sunshine in January: 2.3h

Months with the most sunshine are July and August (Average sunshine: 10h).
The month with the least sunshine is January (Average sunshine: 2.3h).

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Average sunshine days in January
Jamestown, NY

Average sunshine days in January - Jamestown, NY
  • Average sunshine days in January: 5.6 days

The month with the most sunshine days is September (12.5 days).
The month with the least sunshine days is January (5.6 days).

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Average UV index in January
Jamestown, NY

Average UV index in January - Jamestown, NY
  • Average UV index in January: 1

Months with the highest UV index are May, June, July and August (UV index 5).
Months with the lowest UV index are January and December (UV index 1).

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Average cloud cover in January
Jamestown, NY

Average cloud cover in January - Jamestown, NY
  • Average cloud cover in January: 79

The month with the most cloud cover is January (Cloud cover 79).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in January
Jamestown, NY

Average visibility in January - Jamestown, NY
  • Average visibility in January: 4mi

Months with the highest visibility are April, May, June, July, August, September and October (6mi).
The month with the lowest visibility is January (4mi).

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