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December Weather in Joanna, United States

Last updated: June 24, 2025

In December, the average temperature in Joanna, United States hovers around 9°C (49°F). Temperature extremes can range from a brisk -6°C (21°F) to a warm 27°C (80°F). Expect about 118 mm (4.6 in) of precipitation over 9 days, coupled with an average humidity level of 87%.

December Temperature in Joanna

In December in Joanna, the average temperature is 9°C (49°F). The maximum can reach 27°C (80°F) and the minimum can be as low as -6°C (21°F). Be prepared for a wide range of temperatures if you're planning to travel during this time.

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

The chart illustrates December temperature patterns in Joanna, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Joanna, December typically has an average temperature of 9°C (49°F), with highs reaching up to 27°C (80°F) and lows dropping to around -6°C (21°F).
JanFebMarAprMayJunJulAugSepOctNovDec465156647278817976675349
Data source: Temperature data for Joanna 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 Joanna

In Joanna in December, the precipitation amount is 118 mm (4.6 in) over the course of 9 days.

December Precipitation Trends in Joanna

The chart displays monthly precipitation patterns in Joanna, 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 Joanna, December typically receives around 118 mm (4.6 inches) of precipitation spread over approximately 9 days.
JanFebMarAprMayJunJulAugSepOctNovDec9311889105118911081221029791118
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Joanna

In Joanna in December humidity is 87%. With an average temperature of 9°C (49°F), this humidity feels like a damp blanket wrapping around you, making travel uncomfortable and leaving you yearning for a dry breeze to refresh your spirit.

December Average Humidity in Joanna

This chart illustrates the average monthly humidity levels in Joanna, 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 Joanna is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec86%85%84%82%83%82%80%74%75%79%87%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Joanna

In Joanna in December, the maximum UV index reaches 4, which corresponds to a moderate Exposure Category. With a time to burn of 30 minutes, it’s important to take precautions to protect your skin. You can find more details in the Hourly UV Index in Joanna for better planning.

Maximum UV Index Levels in Joanna for December

The chart shows the monthly maximum UV Index (UVI) for Joanna 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 Joanna typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47810111111109864
Data source: Joanna 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 Joanna Compares to Other Months

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

This table compares monthly weather conditions in Joanna, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)93 mm (3.6 inches)86%moderate
February Weather11°C (52°F)118 mm (4.7 inches)85%high
March Weather13°C (56°F)89 mm (3.5 inches)84%very high
April Weather18°C (64°F)105 mm (4.1 inches)82%very high
May Weather22°C (72°F)118 mm (4.6 inches)83%extreme
June Weather25°C (78°F)91 mm (3.6 inches)82%extreme
July Weather27°C (81°F)108 mm (4.2 inches)80%extreme
August Weather26°C (80°F)122 mm (4.8 inches)74%very high
September Weather24°C (76°F)102 mm (4.0 inches)75%very high
October Weather19°C (67°F)97 mm (3.8 inches)79%very high
November Weather12°C (53°F)91 mm (3.6 inches)87%high
December Weather9°C (49°F)118 mm (4.6 inches)87%moderate

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