January weather forecast
American Falls, ID

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Weather in January

American Falls, Idaho is typically swept by chilly January breezes traveling at around 7mph (11.3km/h) while the temperature ranges from 18°F (-7.8°C) to a high of 29.7°F (-1.3°C). Snowy days take up half of the month, accompanied by heavy cloud cover. Most days do not yield much sunshine, making for a dreary start to the year. The absence of sunlight results in a relatively weak UV index. Rain is relatively uncommon, characterizing the dry winter climate of this American town.

Temperature

The advent of January observes an average high-temperature of a still subzero cold 29.7°F (-1.3°C), nearly identical to December's 29.3°F (-1.5°C). Throughout the month of January, American Falls observes an average nighttime temperature of 18°F (-7.8°C).

Humidity

With an average relative humidity of 86%, January is the most humid month in American Falls.

Rainfall

In American Falls, in January, it is raining for 6.4 days, with typically 1.1" (28mm) of accumulated precipitation. Throughout the year, there are 108.7 rainfall days, and 10.47" (266mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall in American Falls. January is the month with the most snowfall. Snow falls for 12.3 days and accumulates 7.2" (183mm) of snow.

Daylight

In American Falls, the average length of the day in January is 9h and 28min.
On the first day of January in American Falls, sunrise is at 8:01 am and sunset at 5:07 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 5:42 pm MST.

Sunshine

The month with the least sunshine in American Falls is January, with an average of 5.1h of sunshine.

UV index

The average daily maximum UV index in January in American Falls is 2. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV rays for the ordinary person.
Note: The maximum UV index, 2 during January, leads to the following recommendations:
Although prolonged sun exposure does not typically bother most people, children, babies, and those with sensitive skin should always have protection. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Sun protection is enhanced with clothing that boasts a tight weave yet offers a loose fit. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
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Frequently asked questions

How cold is it in American Falls in January?

In American Falls, in January, the average high-temperature is 29.7°F (-1.3°C), and the average low-temperature is 18°F (-7.8°C).

What is the most humid month in American Falls?

With an average relative humidity of 86%, January is the most humid month.

What is the average humidity in January in American Falls?

The average relative humidity in January is 86%.

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

In American Falls, Idaho, in January, it is raining for 6.4 days, with typically 1.1" (28mm) of accumulated precipitation.

What is the snowiest month in American Falls?

January is the month with the most snowfall. Snow falls for 12.3 days and accumulates 7.2" (183mm) of snow.

How much does it snow in American Falls in January?

In American Falls, during January, snow falls for 12.3 days and regularly aggregates up to 7.2" (183mm) of snow.

How many hours of daylight does American Falls have in January?

The average day length in January is 9h and 28min.

When is the sunrise / sunset in January in American Falls?

On the first day of January in American Falls, sunrise is at 8:01 am and sunset at 5:07 pm. On the last day of the month, sunrise is at 7:46 am and sunset at 5:42 pm MST.

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

With an average of 5.1h of sunshine, January has the least sunshine of the year in American Falls, Idaho.

How many hours of sunshine does American Falls have in January?

In January, the average sunshine duration is 5.1h.

What is the UV index intensity in January in American Falls?

In January, the average daily maximum UV index in American Falls is 2. A UV Index value of 2, and less, symbolizes a low health threat from exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
29.3°F -1.5°C
29.7°F -1.3°C
33.4°F 0.8°C
Average low temperature
18°F -7.8°C
18°F -7.8°C
21°F -6.1°C
Average pressure
30.26" 769mmHg
30.3" 770mmHg
30.16" 766mmHg
Average wind speed
7mph 11.3km/h
7mph 11.3km/h
8.3mph 13.4km/h
Average max. wind speed
7.6mph 12.2km/h
7.6mph 12.2km/h
9.1mph 14.6km/h
Average wind speed gusts
12.1mph 19.5km/h
12.1mph 19.5km/h
13.9mph 22.4km/h
Average humidity
84%
86%
83%
Average rainfall
0.91" 23mm
1.1" 28mm
1.02" 26mm
Average rainfall days
8.5
6.4
8.4
Average snowfall
5.28" 134mm
7.2" 183mm
5.31" 135mm
Average snowfall days
13.7
12.3
12.8
Average daylight
9h 1min
9h 3min
10h 4min
Average sunshine
5h 1min
5h 1min
6h 0min
Average sunshine days
15.5
17.3
12.4
Average UV index
1
2
2
Average cloud cover
47%
46%
47%
Average visibility
5mi 8km
5mi 8km
5mi 8km

Average temperature in January
American Falls, ID

Average temperature in January - American Falls, ID
  • Average high temperature in January: 29.7°F

The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is December (29.3°F).

  • Average low temperature in January: 18°F

The month with the highest average low temperature is August (58.5°F).
The coldest months (with the lowest average low temperature) are January and December (18°F).

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Average pressure in January
American Falls, ID

Average pressure in January - American Falls, ID
  • Average pressure in January: 30.3"Hg

The month with the highest atmospheric pressure is January (30.3"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

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Average wind speed in January
American Falls, ID

Average wind speed in January - American Falls, ID
  • Average wind speed in January: 7mph

The windiest month (with the highest average wind speed) is April (9.6mph).
The calmest months (with the lowest average wind speed) are January and December (7mph).

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Average humidity in January
American Falls, ID

Average humidity in January - American Falls, ID
  • Average humidity in January: 86%

The month with the highest relative humidity is January (86%).
The month with the lowest relative humidity is August (32%).

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Average rainfall in January
American Falls, ID

Average rainfall in January - American Falls, ID
  • Average rainfall in January: 1.1"

The wettest month (with the highest rainfall) is March (1.18").
The driest month (with the least rainfall) is July (0.59").

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Average rainfall days in January
American Falls, ID

Average rainfall days in January - American Falls, ID
  • Average rainfall days in January: 6.4 days

The month with the highest number of rainy days is March (12.5 days).
The month with the least rainy days is January (6.4 days).

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Average snowfall in January
American Falls, ID

Average snowfall in January - American Falls, ID
  • Average snowfall in January: 7.2"

The month with the highest snowfall is January (7.2").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in January
American Falls, ID

Average snowfall days in January - American Falls, ID
  • Average snowfall days in January: 12.3 days

The month with the highest number of snowfall days is December (13.7 days).
The months with the least snowfall days are July and August (0 days).

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Average daylight in January /
Average sunshine in January
American Falls, ID

Average daylight in January / Average sunshine in January - American 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 1min

The months with the most sunshine are June and July (Average sunshine: 11h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 6min).

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Average sunshine days in January
American Falls, ID

Average sunshine days in January - American Falls, ID
  • Average sunshine days in January: 17.3 days

The month with the most sunshine days is October (20.3 days).
The month with the least sunshine days is February (12.4 days).

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Average UV index in January
American Falls, ID

Average UV index in January - American Falls, ID
  • Average UV index in January: 2

The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in January
American Falls, ID

Average cloud cover in January - American Falls, ID
  • Average cloud cover in January: 46

The months with the most cloud cover are February and December (Cloud cover 47).
The months with the least cloud cover are July and August (Cloud cover 11).

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Average visibility in January
American Falls, ID

Average visibility in January - American Falls, ID
  • Average visibility in January: 5mi

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

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American Falls, Idaho, USA

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