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December Weather in Jonestown, United States

Last updated: June 24, 2025

In December, the average temperature in Jonestown, United States hovers around 12°C (54°F). Expect minimums that can dip to -3°C (26°F) and maximums reaching up to 28°C (82°F). During this time, you might encounter about 55 mm (2.1 in) of precipitation spread over 6 days, with an average humidity level of 87%. Be prepared for a mix of conditions!

December Temperature in Jonestown

In December in Jonestown, the average temperature is 12°C (54°F). The maximum can reach 28°C (82°F), while the minimum can be as low as -3°C (26°F). It’s advisable to pack layers to accommodate the varying temperatures during your travels.

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

The chart illustrates December temperature patterns in Jonestown, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Jonestown, December typically has an average temperature of 12°C (54°F), with highs reaching up to 28°C (82°F) and lows dropping to around -3°C (26°F).
JanFebMarAprMayJunJulAugSepOctNovDec515263687682858579705954
Data source: Temperature data for Jonestown 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 Jonestown

In Jonestown in December, the total precipitation amount is 55 mm (2.1 in) spread over 6 days.

December Precipitation Trends in Jonestown

The chart displays monthly precipitation patterns in Jonestown, 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 Jonestown, December typically receives around 55 mm (2.1 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec45576280152766598102933855
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Jonestown

In Jonestown in December humidity is 87%. With an average temperature of 12°C (54°F), this humidity feels like a damp embrace, making it quite uncomfortable for traveling, as the air feels heavy and can quickly sap your energy as you explore the sights.

December Average Humidity in Jonestown

This chart illustrates the average monthly humidity levels in Jonestown, 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 Jonestown is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%78%77%78%82%78%69%63%66%73%84%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Jonestown

In Jonestown 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 Jonestown for better planning.

Maximum UV Index Levels in Jonestown for December

The chart shows the monthly maximum UV Index (UVI) for Jonestown 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 Jonestown typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec579111112121111964
Data source: Jonestown 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 Jonestown Compares to Other Months

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

This table compares monthly weather conditions in Jonestown, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)45 mm (1.8 inches)78%moderate
February Weather11°C (53°F)57 mm (2.2 inches)78%high
March Weather17°C (63°F)62 mm (2.4 inches)77%very high
April Weather20°C (68°F)80 mm (3.2 inches)78%extreme
May Weather24°C (76°F)152 mm (6.0 inches)82%extreme
June Weather28°C (82°F)76 mm (3.0 inches)78%extreme
July Weather29°C (85°F)65 mm (2.6 inches)69%extreme
August Weather30°C (86°F)98 mm (3.9 inches)63%extreme
September Weather26°C (79°F)102 mm (4.0 inches)66%extreme
October Weather21°C (70°F)93 mm (3.7 inches)73%very high
November Weather15°C (59°F)38 mm (1.5 inches)84%high
December Weather12°C (54°F)55 mm (2.1 inches)87%moderate

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