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December Weather in Johnson, United States

Last updated: June 24, 2025

In December, the average temperature in Johnson, United States hovers around -5°C (23°F), with extremes ranging from a chilly -27°C (-17°F) to a mild 14°C (58°F). Expect 92 mm (3.6 in) of precipitation over approximately 16 days, and prepare for a damp atmosphere with an average humidity of 89%.

December Temperature in Johnson

In December in Johnson, the average temperature is -5°C (23°F). Maximum can reach 14°C (58°F) and minimum can be as low as -27°C (-17°F). It's essential to prepare for a wide range of temperatures if you're planning to travel during this time.

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

The chart illustrates December temperature patterns in Johnson, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Johnson, December typically has an average temperature of -5°C (23°F), with highs reaching up to 14°C (58°F) and lows dropping to around -27°C (-17°F).
JanFebMarAprMayJunJulAugSepOctNovDec182028415563696759483323
Data source: Temperature data for Johnson 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 Johnson

In Johnson in December, the total precipitation amount reaches 92 mm (3.6 in) spread over 16 days.

December Precipitation Trends in Johnson

The chart displays monthly precipitation patterns in Johnson, 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 Johnson, December typically receives around 92 mm (3.6 inches) of precipitation spread over approximately 16 days.
JanFebMarAprMayJunJulAugSepOctNovDec9792921241091161411158716513193
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Johnson

In Johnson 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 Johnson

This chart illustrates the average monthly humidity levels in Johnson, 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 Johnson is approximately 89%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec93%92%86%85%80%74%76%75%78%86%89%89%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Johnson

In Johnson in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Johnson, you can visit Hourly UV Index in Johnson.

Maximum UV Index Levels in Johnson for December

The chart shows the monthly maximum UV Index (UVI) for Johnson 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 Johnson typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
Data source: Johnson 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 Johnson Compares to Other Months

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

This table compares monthly weather conditions in Johnson, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-8°C (18°F)96 mm (3.8 inches)93%low
February Weather-6°C (21°F)92 mm (3.6 inches)92%moderate
March Weather-2°C (28°F)92 mm (3.6 inches)86%moderate
April Weather5°C (42°F)124 mm (4.9 inches)85%high
May Weather13°C (55°F)109 mm (4.3 inches)80%very high
June Weather17°C (64°F)116 mm (4.6 inches)74%very high
July Weather20°C (69°F)141 mm (5.6 inches)76%very high
August Weather19°C (67°F)115 mm (4.5 inches)75%very high
September Weather15°C (59°F)87 mm (3.4 inches)78%high
October Weather9°C (48°F)165 mm (6.5 inches)86%moderate
November Weather0°C (33°F)131 mm (5.2 inches)88%moderate
December Weather-5°C (23°F)92 mm (3.6 inches)89%low

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