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December Weather in Lander, United States

Last updated: June 24, 2025

In Lander, United States, the average temperature in December hovers around -5°C (23°F), with potential extremes reaching as low as -23°C (-9°F) and climbing up to a comfortable 15°C (59°F). Expect about 25 mm (1.0 in) of precipitation spread over 7 days, contributing to an average humidity of 89%. Dress warmly and don’t forget your umbrella!

December Temperature in Lander

In December in Lander, the average temperature is -5°C (23°F). Maximums can reach 15°C (59°F), while minimums can drop as low as -23°C (-9°F). Travelers should be prepared for a wide range of temperatures, making layered clothing essential for comfort.

December Weather in Lander: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Lander, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Lander, December typically has an average temperature of -5°C (23°F), with highs reaching up to 15°C (59°F) and lows dropping to around -23°C (-9°F).
JanFebMarAprMayJunJulAugSepOctNovDec222131364659666456393223
Data source: Temperature data for Lander generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Lander

In Lander in December, the precipitation amount is 25 mm (1.0 in) over the course of 7 days.

December Precipitation Trends in Lander

The chart displays monthly precipitation patterns in Lander, with values for each month alongside December’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how December’s conditions compare to those of other months. In Lander, December typically receives around 25 mm (1.0 inches) of precipitation spread over approximately 7 days.
JanFebMarAprMayJunJulAugSepOctNovDec2438538511153434444482925
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Lander

In Lander in December, humidity is 89%. With an average temperature of -5°C (23°F), this humidity feels like a biting chill that seeps into your bones, making outdoor activities uncomfortable and prompting frequent breaks to warm up indoors.

December Average Humidity in Lander

This chart illustrates the average monthly humidity levels in Lander, with December’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In December, average humidity in Lander is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec90%89%82%72%69%67%65%59%59%69%83%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Lander

In Lander in December, the maximum UV index is 3, which corresponds to a moderate Exposure Category. The time to burn is approximately 30 minutes. For more details on the hourly UV index in Lander, you can check the information here.

Maximum UV Index Levels in Lander for December

The chart shows the monthly maximum UV Index (UVI) for Lander in December, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In December, the maximum UV index in Lander typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35710101212119643
Data source: Lander December UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How December Weather in Lander Compares to Other Months

Weather in Lander varies notably across the year, with each month offering distinct climate conditions. This page compares December’s weather to other months in Lander, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Lander, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-6°C (22°F)24 mm (0.9 inches)90%moderate
February Weather-6°C (22°F)38 mm (1.5 inches)89%moderate
March Weather0°C (32°F)53 mm (2.1 inches)82%high
April Weather2°C (36°F)85 mm (3.4 inches)72%very high
May Weather8°C (46°F)111 mm (4.4 inches)69%very high
June Weather15°C (59°F)53 mm (2.1 inches)67%extreme
July Weather19°C (67°F)43 mm (1.7 inches)65%extreme
August Weather18°C (64°F)44 mm (1.7 inches)59%extreme
September Weather13°C (56°F)44 mm (1.7 inches)59%very high
October Weather4°C (39°F)48 mm (1.9 inches)69%high
November Weather0°C (32°F)29 mm (1.1 inches)83%moderate
December Weather-5°C (23°F)25 mm (1.0 inches)89%moderate

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