December weather forecast
Lander, WY

Share
Magnificence in the nature scenes around the stunning Sinks Canyon in Lander, Wyoming
Magnificence in the nature scenes around the stunning Sinks Canyon in Lander, Wyoming

Weather in December

Winter's grip tightens in Lander come December. The shortest daylight period, lowest temperatures, and frequent snowfalls become December's punchlines. A stark contrast to November is observed in December's substantial increase in humidity levels. A vital characteristic of December’s weather is the drop in temperature to 13.1°F (-10.5°C), coupled with a decent average snowfall of 3.58" (91mm). As Lander prepares to ring in the new year, the predictions for January call for comparably chill forecasts, yet slightly drier conditions.

Temperature

The coldest period is December, when temperatures fluctuate between an average high of 28.4°F (-2°C) and a low of 13.1°F (-10.5°C).

Humidity

In December, the average relative humidity in Lander is 74%.

Rainfall

In Lander, during December, the rain falls for 6.8 days and regularly aggregates up to 0.51" (13mm) of precipitation. In Lander, during the entire year, the rain falls for 92.3 days and collects up to 9.92" (252mm) of precipitation.

Snowfall

January through May, September through December are months with snowfall. In Lander, during December, snow falls for 9.9 days and regularly aggregates up to 3.58" (91mm) of snow. In Lander, during the entire year, snow falls for 56.6 days and aggregates up to 39.65" (1007mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9h and 6min of daylight.
On the first day of December, sunrise is at 7:26 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 4:51 pm MST.

Sunshine

In Lander, the average sunshine in December is 7h.

UV index

January through April, October through December, with an average maximum UV index of 2, are months with the lowest UV index in Lander. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the average person.
Note: The UV index of 2 during December translates into the following guidance:
Most people face no serious problems with extended sun exposure, but those with fair skin, infants, and children always need protection. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. To best shield against UV radiation, choose sun-safe garments and dependable sunglasses. Be on the lookout! Nearly twofold UV radiation from the Sun can be reflected by snow.
[Resources]

Frequently asked questions

What month is the coldest in Lander?

Lander's coldest month, December, registers temperatures that range from a high of 28.4°F (-2°C) to a low of 13.1°F (-10.5°C).

How cold is December in Lander?

The average high-temperature and low-temperature in Lander, Wyoming, during December are 28.4°F (-2°C) and 13.1°F (-10.5°C) respectively.

What is the average humidity in December in Lander?

The average relative humidity in December in Lander, Wyoming, is 74%.

How much does it rain in Lander in December?

In Lander, Wyoming, during December, the rain falls for 6.8 days and regularly aggregates up to 0.51" (13mm) of precipitation.

How many days does it snow in December in Lander?

In Lander, Wyoming, in December, snow falls for 9.9 days, with typically accumulated 3.58" (91mm) of snow.

What is the month with the shortest days in Lander?

December has the shortest days of the year, with an average of 9h and 6min of daylight.

How many hours of daylight does Lander have in December?

In December, the average day length in Lander is 9h and 5min.

When are sunrise and sunset in December in Lander?

On the first day of December, sunrise is at 7:26 am and sunset at 4:41 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 4:51 pm MST.

How many hours of sunshine does Lander have in December?

In December, the average sunshine duration is 7h.

What is the month with the lowest UV index in Lander?

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

How high is the UV index in December in Lander?

In Lander, Wyoming, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from unprotected exposure to UV radiation.
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 December
Lander, WY

Average temperature in December - Lander, WY
  • Average high temperature in December: 28.4°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is December (28.4°F).

  • Average low temperature in December: 13.1°F

The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is December (13.1°F).

[Resources]

Average pressure in December
Lander, WY

Average pressure in December - Lander, WY
  • Average pressure in December: 30.21"Hg

The month with the highest atmospheric pressure is January (30.23"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).

[Resources]

Average wind speed in December
Lander, WY

Average wind speed in December - Lander, WY
  • Average wind speed in December: 7.2mph

The windiest month (with the highest average wind speed) is March (7.7mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

[Resources]

Average humidity in December
Lander, WY

Average humidity in December - Lander, WY
  • Average humidity in December: 74%

The month with the highest relative humidity is February (78%).
The month with the lowest relative humidity is August (34%).

[Resources]

Average rainfall in December
Lander, WY

Average rainfall in December - Lander, WY
  • Average rainfall in December: 0.51"

The wettest month (with the highest rainfall) is April (1.81").
The driest month (with the least rainfall) is January (0.43").

[Resources]

Average rainfall days in December
Lander, WY

Average rainfall days in December - Lander, WY
  • Average rainfall days in December: 6.8 days

The month with the highest number of rainy days is May (12.8 days).
The month with the least rainy days is November (4.8 days).

[Resources]

Average snowfall in December
Lander, WY

Average snowfall in December - Lander, WY
  • Average snowfall in December: 3.58"

The month with the highest snowfall is April (8.15").
The months with the least snowfall are June, July and August (0").

[Resources]

Average snowfall days in December
Lander, WY

Average snowfall days in December - Lander, WY
  • Average snowfall days in December: 9.9 days

The month with the highest number of snowfall days is February (10.1 days).
The months with the least snowfall days are June, July and August (0 days).

[Resources]

Average daylight in December /
Average sunshine in December
Lander, WY

Average daylight in December / Average sunshine in December - Lander, WY
  • Average daylight in December: 9h and 1min

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 December: 7h and 0min

The month with the most sunshine is July (Average sunshine: 12h and 0min).
The months with the least sunshine are January and February (Average sunshine: 6h and 54min).

[Resources]

Average sunshine days in December
Lander, WY

Average sunshine days in December - Lander, WY
  • Average sunshine days in December: 19.1 days

The month with the most sunshine days is November (21.7 days).
The month with the least sunshine days is April (12.3 days).

[Resources]

Average UV index in December
Lander, WY

Average UV index in December - Lander, WY
  • Average UV index in December: 2

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

[Resources]

Average cloud cover in December
Lander, WY

Average cloud cover in December - Lander, WY
  • Average cloud cover in December: 25

The months with the most cloud cover are February and April (Cloud cover 28).
The months with the least cloud cover are July and August (Cloud cover 12).

[Resources]

Average visibility in December
Lander, WY

Average visibility in December - Lander, WY
  • Average visibility in December: 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]

Lander, Wyoming, USA

Weather forecast for your location

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