January weather forecast
Ammon, ID

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Weather in January

January brings the chill of winter to Ammon, Idaho, greeting the year with icy temperatures. The city lies under a blanket of snow, with an average snowfall of 3.86" (98mm) marking the start of the New Year. Days with sunlight are shorter though clear visibility entices winter sports enthusiasts. As the month moves forward, it’s typical for frosty mornings to give way to brisk afternoons. By contrast, the evenings drop back into freezing temperatures, making for a classic winter month.

Temperature

During January, the average high-temperature is a still subzero cold 28°F (-2.2°C), maintaining a close resemblance to that of the preceding month. The average low-temperature during January nights is a still freezing cold 14.2°F (-9.9°C).

Humidity

January is the most humid month in Ammon, with an average relative humidity of 90%.

Rainfall

In Ammon, in January, during 3.7 rainfall days, 0.51" (13mm) of precipitation is typically accumulated. Throughout the year, there are 84.3 rainfall days, and 6.97" (177mm) of precipitation is accumulated.

Snowfall

January through May, September through December are months with snowfall in Ammon. The month with the most snowfall is January, when snow falls for 12.8 days and typically aggregates up to 3.86" (98mm) of snow.

Daylight

The average length of the day in January in Ammon is 9h and 24min.
On the first day of the month, sunrise is at 8:00 am and sunset at 5:02 pm. On the last day of January, sunrise is at 7:45 am and sunset at 5:37 pm MST.

Sunshine

January has the least sunshine of the year in Ammon, with an average of 4.7h of sunshine.

UV index

The months with the lowest UV index in Ammon are January through March, October through December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low threat to health from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 2 in January converts into the following recommendations:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Equip yourself with UVA and UVB-filtering sunglasses on clear, sunny days. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
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Frequently asked questions

How cold is January in Ammon?

During January, Ammon experiences an average high-temperature of 28°F (-2.2°C) and a low-temperature of 14.2°F (-9.9°C).

What is the most humid month in Ammon?

With an average relative humidity of 90%, January is the most humid month.

What is the average humidity in January in Ammon?

The average relative humidity in January is 90%.

How many days does it rain in January in Ammon?

In Ammon, in January, during 3.7 rainfall days, 0.51" (13mm) of precipitation is typically accumulated.

When does it snow the most in Ammon?

January is the month with the most snowfall in Ammon. Snow falls for 12.8 days and accumulates 3.86" (98mm) of snow.

How many days does it snow in January in Ammon?

In Ammon, in January, during 12.8 snowfall days, 3.86" (98mm) of snow is typically accumulated.

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

In Ammon, Idaho, the average day length in January is 9h and 24min.

What time are sunrise and sunset in January in Ammon?

In January, on the first day of the month, sunrise is at 8:00 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 5:37 pm MST.

What is the month with the least sunshine in Ammon?

January has the least sunshine of the year, with an average of 4.7h of sunshine.

How long on average sun shines in January in Ammon?

The average sunshine duration in January in Ammon is 4.7h.

When is the lowest UV index in Ammon?

January through March, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Ammon, Idaho.

What is the UV index intensity in January in Ammon?

In Ammon, the average daily maximum UV index in January is 2. A UV Index 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
27.9°F -2.3°C
28°F -2.2°C
31.5°F -0.3°C
Average low temperature
15.8°F -9°C
14.2°F -9.9°C
18.1°F -7.7°C
Average pressure
30.26" 769mmHg
30.3" 770mmHg
30.16" 766mmHg
Average wind speed
6.1mph 9.8km/h
5.8mph 9.3km/h
7.1mph 11.4km/h
Average max. wind speed
6.6mph 10.6km/h
6.5mph 10.5km/h
7.8mph 12.6km/h
Average wind speed gusts
10.4mph 16.7km/h
10.1mph 16.3km/h
12.1mph 19.5km/h
Average humidity
86%
90%
86%
Average rainfall
0.47" 12mm
0.51" 13mm
0.43" 11mm
Average rainfall days
5.5
3.7
5.1
Average snowfall
3.46" 88mm
3.86" 98mm
2.48" 63mm
Average snowfall days
12.9
12.8
11.3
Average daylight
9h 0min
9h 2min
10h 3min
Average sunshine
5h 0min
4h 4min
5h 3min
Average sunshine days
17.5
18.4
16.2
Average UV index
2
2
2
Average cloud cover
50%
51%
51%
Average visibility
5mi 8km
4mi 6.4km
4mi 6.4km

Average temperature in January
Ammon, ID

Average temperature in January - Ammon, ID
  • Average high temperature in January: 28°F

The warmest month (with the highest average high temperature) is July (86.2°F).
The month with the lowest average high temperature is December (27.9°F).

  • Average low temperature in January: 14.2°F

The month with the highest average low temperature is August (54.3°F).
The coldest month (with the lowest average low temperature) is January (14.2°F).

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Average pressure in January
Ammon, ID

Average pressure in January - Ammon, 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 (29.91"Hg).

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Average wind speed in January
Ammon, ID

Average wind speed in January - Ammon, ID
  • Average wind speed in January: 5.8mph

The windiest month (with the highest average wind speed) is April (9mph).
The calmest month (with the lowest average wind speed) is January (5.8mph).

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Average humidity in January
Ammon, ID

Average humidity in January - Ammon, ID
  • Average humidity in January: 90%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (35%).

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Average rainfall in January
Ammon, ID

Average rainfall in January - Ammon, ID
  • Average rainfall in January: 0.51"

The wettest months (with the highest rainfall) are May and September (0.83").
The driest month (with the least rainfall) is July (0.35").

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Average rainfall days in January
Ammon, ID

Average rainfall days in January - Ammon, ID
  • Average rainfall days in January: 3.7 days

The month with the highest number of rainy days is May (10.7 days).
The month with the least rainy days is January (3.7 days).

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Average snowfall in January
Ammon, ID

Average snowfall in January - Ammon, ID
  • Average snowfall in January: 3.86"

The month with the highest snowfall is January (3.86").
The months with the least snowfall are June, July and August (0").

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Average snowfall days in January
Ammon, ID

Average snowfall days in January - Ammon, ID
  • Average snowfall days in January: 12.8 days

The month with the highest number of snowfall days is December (12.9 days).
The months with the least snowfall days are June, July and August (0 days).

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

Average daylight in January / Average sunshine in January - Ammon, 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: 4h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).

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Average sunshine days in January
Ammon, ID

Average sunshine days in January - Ammon, ID
  • Average sunshine days in January: 18.4 days

The month with the most sunshine days is October (22.1 days).
The month with the least sunshine days is February (16.2 days).

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Average UV index in January
Ammon, ID

Average UV index in January - Ammon, ID
  • Average UV index in January: 2

The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, October, November and December (UV index 2).

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Average cloud cover in January
Ammon, ID

Average cloud cover in January - Ammon, ID
  • Average cloud cover in January: 51

The months with the most cloud cover are January and February (Cloud cover 51).
The months with the least cloud cover are July and August (Cloud cover 11).

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Average visibility in January
Ammon, ID

Average visibility in January - Ammon, ID
  • Average visibility in January: 4mi

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 and February (4mi).

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Ammon, Idaho, USA

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