January weather forecast
Lyman, WY

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Weather in January

Comfort for outdoor activities in Lyman, Wyoming in January may be diminished due to average low temperatures of 12.2°F (-11°C). The city can expect snowy scenes, with snowfall on approximately 12.2 days. This is a stark contrast to the weather in the warmer months. Frequently, the humidity is at a very high 82%, making the air feel considerably chillier. Visitors should dress warmly, as the temperatures often rest at both the high and low ends of the temperature range for the entire year.

Temperature

Lyman experiences a transition to a still freezing cold 27.9°F (-2.3°C) in average high-temperatures with the arrival of January, not greatly differing from December's 26.6°F (-3°C). The average low-temperature, in January, is an extreme cold 12.2°F (-11°C).

Humidity

January and February, with an average relative humidity of 82%, are the most humid months.

Rainfall

The months with the least rainfall are January and July Rain falls for 8.2 days and accumulates 0.63" (16mm) of rain.

Snowfall

January through June, September through December are months with snowfall. In January, it is snowing for 12.2 days. Throughout January, 4.02" (102mm) of snow is accumulated. In Lyman, during the entire year, snow falls for 85.7 days and aggregates up to 41.18" (1046mm) of snow.

Daylight

In January, the average length of the day in Lyman is 9h and 36min.
On the first day of the month, sunrise is at 7:46 am and sunset at 5:02 pm. On the last day of January, sunrise is at 7:33 am and sunset at 5:35 pm MST.

Sunshine

In January, the average sunshine is 6.5h.

UV index

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Lyman. A UV Index of 2, and less, symbolizes a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.
Note: In January, a daily maximum UV index of 2 leads to the following instructions:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. It's crucial to reduce time in the direct Sun around mid-day due to the intense solar radiation. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. 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 January in Lyman?

The average high-temperature and low-temperature in Lyman, Wyoming, during January are 27.9°F (-2.3°C) and 12.2°F (-11°C) respectively.

What is the most humid month in Lyman?

January and February, with an average relative humidity of 82%, are most humid months in Lyman, Wyoming.

What is the average humidity in January in Lyman?

In January, the average relative humidity in Lyman, Wyoming, is 82%.

What is the driest month in Lyman?

January and July are months with the least rain in Lyman when the rain falls for 8.2 days and typically aggregates up to 0.63" (16mm) of rain.

How much does it rain in Lyman in January?

In Lyman, Wyoming, in January, it is raining for 8.2 days, with typically 0.63" (16mm) of accumulated precipitation.

How many days does it snow in January in Lyman?

In Lyman, during January, snow falls for 12.2 days and regularly aggregates up to 4.02" (102mm) of snow.

How many hours of daylight does Lyman have in January?

In January, the average day length in Lyman, Wyoming, is 9h and 36min.

What time are sunrise and sunset in January in Lyman?

In January, on the first day of the month, sunrise is at 7:46 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 7:33 am and sunset at 5:35 pm MST.

How long on average sun shines in January in Lyman?

In January, the average sunshine duration in Lyman, Wyoming, is 6.5h.

When is the lowest UV index in Lyman?

The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2.

What is the UV index reading in January in Lyman?

In Lyman, Wyoming, the average daily maximum UV index in January is 2. A UV Index value of 2, and less, symbolizes a low health threat from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
26.6°F -3°C
27.9°F -2.3°C
28.8°F -1.8°C
Average low temperature
12.6°F -10.8°C
12.2°F -11°C
13.8°F -10.1°C
Average pressure
30.24" 768mmHg
30.28" 769mmHg
30.15" 766mmHg
Average wind speed
8.9mph 14.3km/h
9.3mph 15km/h
10.1mph 16.3km/h
Average max. wind speed
9.6mph 15.4km/h
10.1mph 16.3km/h
11mph 17.7km/h
Average wind speed gusts
16mph 25.7km/h
16.8mph 27km/h
17.2mph 27.7km/h
Average humidity
80%
82%
82%
Average rainfall
0.79" 20mm
0.63" 16mm
0.83" 21mm
Average rainfall days
8.3
8.2
10
Average snowfall
5.79" 147mm
4.02" 102mm
5.31" 135mm
Average snowfall days
13.3
12.2
14.8
Average daylight
9h 2min
9h 4min
10h 4min
Average sunshine
6h 2min
6h 3min
6h 5min
Average sunshine days
15.7
17.2
10.9
Average UV index
2
2
2
Average cloud cover
33%
31%
36%
Average visibility
6mi 9.7km
5mi 8km
5mi 8km

Average temperature in January
Lyman, WY

Average temperature in January - Lyman, WY
  • Average high temperature in January: 27.9°F

The warmest month (with the highest average high temperature) is July (78.4°F).
The month with the lowest average high temperature is December (26.6°F).

  • Average low temperature in January: 12.2°F

The month with the highest average low temperature is July (55.6°F).
The coldest month (with the lowest average low temperature) is January (12.2°F).

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Average pressure in January
Lyman, WY

Average pressure in January - Lyman, WY
  • 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 (29.88"Hg).

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Average wind speed in January
Lyman, WY

Average wind speed in January - Lyman, WY
  • Average wind speed in January: 9.3mph

The windiest month (with the highest average wind speed) is April (10.6mph).
The calmest month (with the lowest average wind speed) is July (7.6mph).

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Average humidity in January
Lyman, WY

Average humidity in January - Lyman, WY
  • Average humidity in January: 82%

The months with the highest relative humidity are January and February (82%).
The months with the lowest relative humidity are July and August (36%).

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Average rainfall in January
Lyman, WY

Average rainfall in January - Lyman, WY
  • Average rainfall in January: 0.63"

The wettest month (with the highest rainfall) is May (2.01").
The driest months (with the least rainfall) are January and July (0.63").

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Average rainfall days in January
Lyman, WY

Average rainfall days in January - Lyman, WY
  • Average rainfall days in January: 8.2 days

The month with the highest number of rainy days is May (16.1 days).
The month with the least rainy days is November (6 days).

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Average snowfall in January
Lyman, WY

Average snowfall in January - Lyman, WY
  • Average snowfall in January: 4.02"

The month with the highest snowfall is March (8.78").
The months with the least snowfall are July and August (0").

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Average snowfall days in January
Lyman, WY

Average snowfall days in January - Lyman, WY
  • Average snowfall days in January: 12.2 days

The month with the highest number of snowfall days is March (15.1 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
Lyman, WY

Average daylight in January / Average sunshine in January - Lyman, WY
  • Average daylight in January: 9h and 4min

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

  • Average sunshine in January: 6h and 3min

The months with the most sunshine are July and August (Average sunshine: 11h and 54min).
The month with the least sunshine is December (Average sunshine: 6h and 24min).

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Average sunshine days in January
Lyman, WY

Average sunshine days in January - Lyman, WY
  • Average sunshine days in January: 17.2 days

The month with the most sunshine days is October (19.2 days).
The month with the least sunshine days is April (9.4 days).

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Average UV index in January
Lyman, WY

Average UV index in January - Lyman, WY
  • Average UV index in January: 2

The months with the highest UV index are June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).

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Average cloud cover in January
Lyman, WY

Average cloud cover in January - Lyman, WY
  • Average cloud cover in January: 31

The month with the most cloud cover is February (Cloud cover 36).
The month with the least cloud cover is August (Cloud cover 12).

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Average visibility in January
Lyman, WY

Average visibility in January - Lyman, WY
  • Average visibility in January: 5mi

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

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Lyman, Wyoming, USA

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