January weather forecast
Jerome, ID

Share
The high rocks around the Snake River near the iconic Shoshone Falls in Jerome County, Idaho
The high rocks around the Snake River near the iconic Shoshone Falls in Jerome County, Idaho

Weather in January

The weather in Jerome, Idaho, ushers in the year with chilly temperatures and significant snowfall. Compared to the milder conditions of December, January features a drop in maximum temperatures to 33.3°F (0.7°C) and a plunge in the minimum to 22.5°F (-5.3°C). Locals must be prepared for an average of 7.44" (189mm) of snow, spread over nearly 11 days within the month. The cold temperatures make snowfall a common occurrence and outdoor activities require proper winter gear. As the month progresses, anticipation for the typically less snowy February sets in.

Temperature

Jerome's weather in January displays an average high-temperature of a still icy 33.3°F (0.7°C), showing minor disparity from December's 32.9°F (0.5°C). Throughout the month of January, Jerome witnesses an average temperature of 22.5°F (-5.3°C).

Humidity

The most humid month in Jerome is January, with an average relative humidity of 80%.

Rainfall

In Jerome, Idaho, in January, it is raining for 6.1 days, with typically 1.26" (32mm) of accumulated precipitation. Throughout the year, there are 86.9 rainfall days, and 8.98" (228mm) of precipitation is accumulated.

Snowfall

January through April, October through December are months with snowfall. January is the month with the most snowfall. Snow falls for 10.8 days and accumulates 7.44" (189mm) of snow.

Daylight

The average length of the day in January is 9h and 28min.
On the first day of January, sunrise is at 8:08 am and sunset at 5:14 pm. On the last day of the month, sunrise is at 7:53 am and sunset at 5:49 pm MST.

Sunshine

In January, the average sunshine in Jerome, Idaho, is 5.9h.

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 value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV radiation for the ordinary person.
Note: The maximum daily UV index, 2 in January, converts into the following recommendations:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Avoiding the Sun during its peak radiation time around midday is a healthy practice. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
[Resources]

Frequently asked questions

How cold is January in Jerome?

In Jerome, 33.3°F (0.7°C) is the average high-temperature and 22.5°F (-5.3°C) is the average low-temperature during January.

What is the most humid month in Jerome?

With an average relative humidity of 80%, January is the most humid month.

What is the average humidity in January in Jerome?

In January, the average relative humidity in Jerome is 80%.

How much does it rain in Jerome in January?

In Jerome, Idaho, during January, the rain falls for 6.1 days and regularly aggregates up to 1.26" (32mm) of precipitation.

When does it snow the most in Jerome?

January is the month with the most snowfall. Snow falls for 10.8 days and accumulates 7.44" (189mm) of snow.

How much does it snow in Jerome in January?

In January, in Jerome, it is snowing for 10.8 days. Throughout January, 7.44" (189mm) of snow is accumulated.

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

In January, the average day length in Jerome, Idaho, is 9h and 28min.

When are sunrise and sunset in January in Jerome?

In January, on the first day of the month, sunrise is at 8:08 am and sunset at 5:14 pm. On the last day of the month, in Jerome, sunrise is at 7:53 am and sunset at 5:49 pm MST.

How many hours of sunshine does Jerome have in January?

The average sunshine duration in January in Jerome is 5.9h.

When is the lowest UV index in Jerome?

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

What is the UV index intensity in January in Jerome?

In Jerome, the average daily maximum UV index in January is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from exposure to Sun's UV rays.
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
Jerome, ID

Average temperature in January - Jerome, ID
  • Average high temperature in January: 33.3°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 (32.9°F).

  • Average low temperature in January: 22.5°F

The month with the highest average low temperature is July (60.8°F).
The coldest month (with the lowest average low temperature) is December (21.9°F).

[Resources]

Average pressure in January
Jerome, ID

Average pressure in January - Jerome, 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).

[Resources]

Average wind speed in January
Jerome, ID

Average wind speed in January - Jerome, ID
  • Average wind speed in January: 7.3mph

The windiest month (with the highest average wind speed) is April (9.5mph).
The calmest month (with the lowest average wind speed) is August (7mph).

[Resources]

Average humidity in January
Jerome, ID

Average humidity in January - Jerome, ID
  • Average humidity in January: 80%

The month with the highest relative humidity is January (80%).
The months with the lowest relative humidity are July and August (29%).

[Resources]

Average rainfall in January
Jerome, ID

Average rainfall in January - Jerome, ID
  • Average rainfall in January: 1.26"

The wettest month (with the highest rainfall) is December (1.3").
The driest month (with the least rainfall) is July (0.16").

[Resources]

Average rainfall days in January
Jerome, ID

Average rainfall days in January - Jerome, ID
  • Average rainfall days in January: 6.1 days

The month with the highest number of rainy days is March (11.3 days).
The month with the least rainy days is July (3.3 days).

[Resources]

Average snowfall in January
Jerome, ID

Average snowfall in January - Jerome, ID
  • Average snowfall in January: 7.44"

The month with the highest snowfall is January (7.44").
The months with the least snowfall are May, June, July, August and September (0").

[Resources]

Average snowfall days in January
Jerome, ID

Average snowfall days in January - Jerome, ID
  • Average snowfall days in January: 10.8 days

The months with the highest number of snowfall days are January and December (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

[Resources]

Average daylight in January /
Average sunshine in January
Jerome, ID

Average daylight in January / Average sunshine in January - Jerome, 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 42min).

[Resources]

Average sunshine days in January
Jerome, ID

Average sunshine days in January - Jerome, ID
  • Average sunshine days in January: 17.7 days

The month with the most sunshine days is July (25.2 days).
The month with the least sunshine days is March (15.2 days).

[Resources]

Average UV index in January
Jerome, ID

Average UV index in January - Jerome, 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).

[Resources]

Average cloud cover in January
Jerome, ID

Average cloud cover in January - Jerome, ID
  • Average cloud cover in January: 37

The month with the most cloud cover is December (Cloud cover 39).
The months with the least cloud cover are July and August (Cloud cover 9).

[Resources]

Average visibility in January
Jerome, ID

Average visibility in January - Jerome, 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).

[Resources]

Jerome, Idaho, USA

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location