Idaho Falls
Idaho, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Idaho Falls, ID

An eye-catching shot of the Snake River, Idaho Falls, with a clear view of the iconic Idaho Falls Temple in the back, through the trees
An eye-catching shot of the Snake River, Idaho Falls, with a clear view of the iconic Idaho Falls Temple in the back, through the trees
January, the same as December, in Idaho Falls, Idaho, is another subzero cold winter month, with average temperature ranging between max 29.7°F (-1.3°C) and min 12.6°F (-10.8°C).

Temperature

January is the coldest month, with an average high-temperature of 29.7°F (-1.3°C) and an average low-temperature of 12.6°F (-10.8°C).

Rainfall

In Idaho Falls, during January, the rain falls for 11 days and regularly aggregates up to 1.3" (31.8mm) of precipitation. Throughout the year, there are 100 rainfall days, and 14.2" (361.1mm) of precipitation is accumulated.

Daylight

In Idaho Falls, the average length of the day is 9.4h.

Sunshine

January, November and December, with an average of 4h of sunshine, are months with the least sunshine in Idaho Falls.

UV index

Months with the lowest UV index in Idaho Falls are January and December, with an average maximum UV index of 1. A UV Index of 2, and less, symbolizes a low threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 1 transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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.

What is the coldest month in Idaho Falls?

January is the coldest month, with an average high-temperature of 29.7°F (-1.3°C) and an average low-temperature of 12.6°F (-10.8°C).

What is the temperature in January in Idaho Falls?

In Idaho Falls, in January, the average high-temperature is 29.7°F (-1.3°C), and the average low-temperature is 12.6°F (-10.8°C).

How much does it rain in Idaho Falls in January?

In Idaho Falls, Idaho, in January, during 11 rainfall days, 1.3" (31.8mm) of precipitation is typically accumulated.

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

In Idaho Falls, the average length of the day in January is 9.4h.

What is the month with the least sunshine in Idaho Falls?

January, November and December, with an average of 4h of sunshine, are months with the least sunshine.

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

In January, the average sunshine is 4h.

When is the lowest UV index in Idaho Falls?

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

How high is the UV index in January in Idaho Falls?

In Idaho Falls, Idaho, the average daily maximum UV index in January is 1. A UV Index of 2, and less, symbolizes a minimal hazard to health from the exposure to the Sun's UV radiation.
Average temperature in January - Idaho Falls, ID
  • Average high temperature in January: 29.7°F

The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in January: 12.5°F

The month with the highest average low temperature is July (51.4°F).
The coldest month (with the lowest average low temperature) is January (12.5°F).

Average rainfall in January - Idaho Falls, ID
  • Average rainfall in January: 1.3"

The wettest month (with the highest rainfall) is May (2").
The driest month (with the lowest rainfall) is July (0.7").

Average rainfall days in January - Idaho Falls, ID
  • Average rainfall days in January: 11 days

Months with the highest number of rainy days are January and December (11 days).
Months with the lowest number of rainy days are July and October (5 days).

Average daylight in January / Average sunshine in January - Idaho Falls, ID
  • Average daylight in January: 9.4h

The month with the longest days is June (Average daylight: 15.4h).
The month with shortest days is December (Average daylight: 9h).

  • Average sunshine in January: 4h

The month with most sunshine is July (Average sunshine: 12h).
Months with least sunshine are January, November and December (Average sunshine: 4).

Average UV index in January - Idaho Falls, ID
  • Average UV index in January: 1

The month with the highest UV index is July (UV index 10).
Months with the lowest UV index are January and December (UV index 1).