January weather forecast
Twin Falls, ID

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The high water of the Shoshone Falls in Twin Falls, Idaho, falling over the high rock cliffs and flowing into a river below
The high water of the Shoshone Falls in Twin Falls, Idaho, falling over the high rock cliffs and flowing into a river below

Weather in January

January in Twin Falls, Idaho, begins the year with chilly weather conditions. A layer of snow covers the landscape with 5.04" (128mm) of snowfall on average; a significant decrease in temperature marks the start of winter. Compared to December, the cold is more pronounced with the temperature hitting a high of only 34.9°F (1.6°C) and a low of 24.1°F (-4.4°C). As the days advance, residents bundle up in their warmest clothes, and heaters run full blast inside homes and offices. Outdoor activities are limited, and everyone anticipates the arrival of warmer weather.

Temperature

January's presence marks an average high-temperature of a still icy 34.9°F (1.6°C), subtly varied from December's 34°F (1.1°C). January's nights observe an average temperature of 24.1°F (-4.4°C).

Humidity

The most humid month in Twin Falls, Idaho, is January, with an average relative humidity of 78%.

Rainfall

In Twin Falls, Idaho, in January, during 7.8 rainfall days, 1.22" (31mm) of precipitation is typically accumulated. Throughout the year, in Twin Falls, there are 91.4 rainfall days, and 9.29" (236mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, October through December. The month with the most snowfall is January, when snow falls for 8.9 days and typically aggregates up to 5.04" (128mm) of snow.

Daylight

In Twin Falls, Idaho, the average length of the day in January is 9h and 29min.
On the first day of the month, sunrise is at 8:07 am and sunset at 5:15 pm. On the last day of January, in Twin Falls, Idaho, sunrise is at 7:52 am and sunset at 5:49 pm MST.

Sunshine

In January, the average sunshine in Twin Falls is 5.9h.

UV index

The months with the lowest UV index in Twin Falls, Idaho, are January, February, 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 unprotected exposure to Sun's UV rays for ordinary individuals.
Note: In January, a daily UV index of 2 turns into the following recommendations:
Despite the majority tolerating prolonged sun exposure, those with sensitive skin, infants, and children demand continual protection. Avoiding the Sun during its peak radiation time around midday is a healthy practice. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Take into account! The reflection from snow can nearly double the Sun's UV radiation intensity.
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Frequently asked questions

How cold is January in Twin Falls?

In January, in Twin Falls, the average high-temperature is 34.9°F (1.6°C), and the average low-temperature is 24.1°F (-4.4°C).

What is the most humid month in Twin Falls?

January is the most humid month in Twin Falls, with an average relative humidity of 78%.

What is the average humidity in January in Twin Falls?

In Twin Falls, Idaho, the average relative humidity in January is 78%.

How many days does it rain in January in Twin Falls?

In Twin Falls, Idaho, in January, during 7.8 rainfall days, 1.22" (31mm) of precipitation is typically accumulated.

When does it snow the most in Twin Falls?

January is the month with the most snowfall in Twin Falls. Snow falls for 8.9 days and accumulates 5.04" (128mm) of snow.

How much does it snow in Twin Falls in January?

In January, it is snowing for 8.9 days. Throughout January, 5.04" (128mm) of snow is accumulated.

What is the average length of the day in January in Twin Falls?

The average day length in January in Twin Falls is 9h and 29min.

When are sunrise and sunset in January in Twin Falls?

On the first day of January in Twin Falls, Idaho, sunrise is at 8:07 am and sunset at 5:15 pm. On the last day of the month, sunrise is at 7:52 am and sunset at 5:49 pm MST.

How long on average sun shines in January in Twin Falls?

The average sunshine duration in January in Twin Falls is 5.9h.

What is the month with the lowest UV index in Twin Falls?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Twin Falls.

What is the UV index reading in January in Twin Falls?

In Twin Falls, Idaho, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability 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
Twin Falls, ID

Average temperature in January - Twin Falls, ID
  • Average high temperature in January: 34.9°F

The warmest month (with the highest average high temperature) is July (89.6°F).
The month with the lowest average high temperature is December (34°F).

  • Average low temperature in January: 24.1°F

The month with the highest average low temperature is July (62.1°F).
The coldest month (with the lowest average low temperature) is December (23°F).

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Average pressure in January
Twin Falls, ID

Average pressure in January - Twin Falls, ID
  • Average pressure in January: 30.28"Hg

The month with the highest atmospheric pressure is January (30.28"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).

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Average wind speed in January
Twin Falls, ID

Average wind speed in January - Twin Falls, ID
  • Average wind speed in January: 7.4mph

The windiest month (with the highest average wind speed) is April (10mph).
The calmest month (with the lowest average wind speed) is August (7.3mph).

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Average humidity in January
Twin Falls, ID

Average humidity in January - Twin Falls, ID
  • Average humidity in January: 78%

The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is July (28%).

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Average rainfall in January
Twin Falls, ID

Average rainfall in January - Twin Falls, ID
  • Average rainfall in January: 1.22"

The wettest month (with the highest rainfall) is December (1.3").
The driest months (with the least rainfall) are July and August (0.24").

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Average rainfall days in January
Twin Falls, ID

Average rainfall days in January - Twin Falls, ID
  • Average rainfall days in January: 7.8 days

The month with the highest number of rainy days is March (12.1 days).
The month with the least rainy days is August (4.4 days).

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Average snowfall in January
Twin Falls, ID

Average snowfall in January - Twin Falls, ID
  • Average snowfall in January: 5.04"

The month with the highest snowfall is January (5.04").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Twin Falls, ID

Average snowfall days in January - Twin Falls, ID
  • Average snowfall days in January: 8.9 days

The month with the highest number of snowfall days is December (9.4 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
Twin Falls, ID

Average daylight in January / Average sunshine in January - Twin Falls, ID
  • Average daylight in January: 9h and 3min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in January: 5h and 5min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is December (Average sunshine: 5h and 48min).

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Average sunshine days in January
Twin Falls, ID

Average sunshine days in January - Twin Falls, ID
  • Average sunshine days in January: 18.7 days

The month with the most sunshine days is August (23.3 days).
The month with the least sunshine days is March (14.7 days).

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Average UV index in January
Twin Falls, ID

Average UV index in January - Twin Falls, 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
Twin Falls, ID

Average cloud cover in January - Twin Falls, ID
  • Average cloud cover in January: 37

The month with the most cloud cover is December (Cloud cover 40).
The months with the least cloud cover are July and August (Cloud cover 10).

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Average visibility in January
Twin Falls, ID

Average visibility in January - Twin Falls, ID
  • Average visibility in January: 6mi

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

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Twin Falls, Idaho, USA

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