January weather forecast
New Plymouth, ID

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Weather in January

January, like December, in New Plymouth, Idaho, is another cold winter month, with an average temperature fluctuating between 36.1°F (2.3°C) and 23.5°F (-4.7°C).

Temperature

January commences with an average high-temperature of a still wintry 36.1°F (2.3°C), showing little deviation from December's 35.8°F (2.1°C). New Plymouth's average low-temperature in January is measured at a freezing cold 23.5°F (-4.7°C).

Humidity

January is the most humid month in New Plymouth, with an average relative humidity of 82%.

Rainfall

In New Plymouth, Idaho, in January, during 10.2 rainfall days, 1.46" (37mm) of precipitation is typically accumulated. In New Plymouth, during the entire year, the rain falls for 95.4 days and collects up to 10.2" (259mm) of precipitation.

Snowfall

January through April, November and December are months with snowfall in New Plymouth. In New Plymouth, in January, during 5.9 snowfall days, 3.27" (83mm) of snow is typically accumulated. Throughout the year, there are 22.5 snowfall days, and 12.01" (305mm) of snow is accumulated.

Daylight

The average length of the day in January in New Plymouth is 9h and 21min.
On the first day of the month, sunrise is at 8:21 am and sunset at 5:19 pm. On the last day of January, sunrise is at 8:05 am and sunset at 5:55 pm MST.

Sunshine

In January, the average sunshine is 5.5h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for average individuals.
Note: The UV index of 2 in January translates into these instructions:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. It's recommended to limit sun exposure when its radiation is at its peak during midday. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
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Frequently asked questions

How cold is it in New Plymouth in January?

New Plymouth in January has an average high-temperature of 36.1°F (2.3°C) and an average low-temperature of 23.5°F (-4.7°C).

What is the most humid month in New Plymouth?

January is the most humid month in New Plymouth, Idaho, with an average relative humidity of 82%.

What is the average humidity in January in New Plymouth?

In January, the average relative humidity is 82%.

How many days does it rain in January in New Plymouth?

In New Plymouth, during January, the rain falls for 10.2 days and regularly aggregates up to 1.46" (37mm) of precipitation.

How many days does it snow in January in New Plymouth?

In New Plymouth, during January, snow falls for 5.9 days and regularly aggregates up to 3.27" (83mm) of snow.

How many hours of daylight does New Plymouth have in January?

In New Plymouth, the average day length in January is 9h and 21min.

When are sunrise and sunset in January in New Plymouth?

In January, on the first day of the month, sunrise is at 8:21 am and sunset at 5:19 pm. On the last day of the month, in New Plymouth, sunrise is at 8:05 am and sunset at 5:55 pm MST.

How long on average sun shines in January in New Plymouth?

In New Plymouth, the average sunshine duration in January is 5.5h.

When is the lowest UV index in New Plymouth?

The months with the lowest UV index in New Plymouth, Idaho, are January, February, November and December, with an average maximum UV index of 2.

How high is the UV index in January in New Plymouth?

The average daily maximum UV index in January in New Plymouth, Idaho, is 2. A UV Index reading of 2, and below, represents 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
New Plymouth, ID

Average temperature in January - New Plymouth, ID
  • Average high temperature in January: 36.1°F

The warmest month (with the highest average high temperature) is July (91.6°F).
The month with the lowest average high temperature is December (35.8°F).

  • Average low temperature in January: 23.5°F

The month with the highest average low temperature is August (61.3°F).
The coldest month (with the lowest average low temperature) is December (23.4°F).

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Average pressure in January
New Plymouth, ID

Average pressure in January - New Plymouth, ID
  • Average pressure in January: 30.24"Hg

The month with the highest atmospheric pressure is January (30.24"Hg).
The months with the lowest atmospheric pressure are June and August (29.92"Hg).

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Average wind speed in January
New Plymouth, ID

Average wind speed in January - New Plymouth, ID
  • Average wind speed in January: 3.9mph

The windiest month (with the highest average wind speed) is April (6.3mph).
The calmest month (with the lowest average wind speed) is January (3.9mph).

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Average humidity in January
New Plymouth, ID

Average humidity in January - New Plymouth, ID
  • Average humidity in January: 82%

The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is August (30%).

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Average rainfall in January
New Plymouth, ID

Average rainfall in January - New Plymouth, ID
  • Average rainfall in January: 1.46"

The wettest month (with the highest rainfall) is March (1.61").
The driest month (with the least rainfall) is July (0.12").

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Average rainfall days in January
New Plymouth, ID

Average rainfall days in January - New Plymouth, ID
  • Average rainfall days in January: 10.2 days

The month with the highest number of rainy days is March (15.3 days).
The month with the least rainy days is August (3.2 days).

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Average snowfall in January
New Plymouth, ID

Average snowfall in January - New Plymouth, ID
  • Average snowfall in January: 3.27"

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

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Average snowfall days in January
New Plymouth, ID

Average snowfall days in January - New Plymouth, ID
  • Average snowfall days in January: 5.9 days

The month with the highest number of snowfall days is December (7.5 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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Average daylight in January /
Average sunshine in January
New Plymouth, ID

Average daylight in January / Average sunshine in January - New Plymouth, ID
  • Average daylight in January: 9h and 2min

The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).

  • Average sunshine in January: 5h and 3min

The month with the most sunshine is July (Average sunshine: 12h and 6min).
The month with the least sunshine is December (Average sunshine: 5h and 18min).

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Average sunshine days in January
New Plymouth, ID

Average sunshine days in January - New Plymouth, ID
  • Average sunshine days in January: 17.2 days

The month with the most sunshine days is July (25.6 days).
The month with the least sunshine days is March (13.8 days).

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Average UV index in January
New Plymouth, ID

Average UV index in January - New Plymouth, ID
  • Average UV index in January: 2

The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).

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Average cloud cover in January
New Plymouth, ID

Average cloud cover in January - New Plymouth, ID
  • Average cloud cover in January: 42

The month with the most cloud cover is December (Cloud cover 43).
The months with the least cloud cover are July and August (Cloud cover 8).

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Average visibility in January
New Plymouth, ID

Average visibility in January - New Plymouth, ID
  • Average visibility in January: 5mi

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

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New Plymouth, Idaho, USA

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