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December Weather in Johnson, United States

Last updated: June 24, 2025

In Johnson, United States, the average temperature in December hovers around 3°C (38°F), with variations that can swing dramatically from a chilling -19°C (-1°F) to a surprising 24°C (76°F). Expect a moderate precipitation of 19 mm (0.8 in) over about 2 days, and be prepared for an average humidity level of 83%, making for a distinctly crisp atmosphere.

December Temperature in Johnson

In December in Johnson, the average temperature is 3°C (38°F). Maximum temperatures can reach 24°C (76°F), while minimum temperatures can drop as low as -19°C (-1°F). It's essential to pack layers for your trip, as you'll experience a wide range of temperatures throughout the day.

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 3°C (38°F), with highs reaching up to 24°C (76°F) and lows dropping to around -19°C (-1°F).
JanFebMarAprMayJunJulAugSepOctNovDec353548556477807772564638
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 precipitation amount is 19 mm (0.8 in) over a span of 2 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 19 mm (0.8 inches) of precipitation spread over approximately 2 days.
JanFebMarAprMayJunJulAugSepOctNovDec15133844843839603429819
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 83%. With an average temperature of 3°C (38°F), this humidity feels like a cold, damp embrace that chills you to the bone, making outdoor activities feel brisk and uncomfortable for traveling.

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 83%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec74%77%65%67%81%82%82%84%79%75%79%83%
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 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 Johnson, you can check the information here.

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 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec458101112121110753
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 Weather2°C (35°F)15 mm (0.6 inches)74%moderate
February Weather2°C (36°F)13 mm (0.5 inches)77%moderate
March Weather9°C (48°F)38 mm (1.5 inches)65%very high
April Weather13°C (55°F)44 mm (1.7 inches)67%very high
May Weather18°C (65°F)84 mm (3.3 inches)81%extreme
June Weather25°C (77°F)38 mm (1.5 inches)82%extreme
July Weather27°C (81°F)38 mm (1.5 inches)82%extreme
August Weather25°C (78°F)60 mm (2.4 inches)84%extreme
September Weather22°C (73°F)34 mm (1.3 inches)79%very high
October Weather14°C (57°F)29 mm (1.1 inches)75%high
November Weather8°C (47°F)8 mm (0.3 inches)79%moderate
December Weather3°C (38°F)19 mm (0.8 inches)83%moderate

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