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December Weather in Isola, United States

Last updated: June 24, 2025

In Isola, United States, the average temperature in December hovers around 11°C (52°F). Expect a dynamic range with minimums plummeting to -4°C (25°F) and maximums soaring up to 28°C (82°F). Over the month, anticipate about 123 mm (4.9 in) of precipitation spread across 10 days, accompanied by an average humidity of 88%—making it a month of both chill and wetness.

December Temperature in Isola

In December in Isola, the average temperature is 11°C (52°F). Maximum temperatures can reach 28°C (82°F), while minimums can drop as low as -4°C (25°F). This variation in temperatures means travelers should pack layers to stay comfortable regardless of the weather.

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

The chart illustrates December temperature patterns in Isola, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Isola, December typically has an average temperature of 11°C (52°F), with highs reaching up to 28°C (82°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec475160647480838278685451
Data source: Temperature data for Isola 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 Isola

In Isola in December, the total precipitation amount is 123 mm (4.9 in) over the course of 10 days.

December Precipitation Trends in Isola

The chart displays monthly precipitation patterns in Isola, 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 Isola, December typically receives around 123 mm (4.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec121189162162114104971119812092124
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Isola

In Isola in December, humidity is 88%. With an average temperature of 11°C (52°F), this humidity feels like a heavy blanket wrapping around you, making travel uncomfortable and the air feel thick, encouraging you to seek shelter or stay hydrated as you explore.

December Average Humidity in Isola

This chart illustrates the average monthly humidity levels in Isola, 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 Isola is approximately 88%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec84%83%80%82%83%80%80%75%73%76%84%88%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Isola

In Isola 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 Isola for better planning.

Maximum UV Index Levels in Isola for December

The chart shows the monthly maximum UV Index (UVI) for Isola 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 Isola typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec47811111211119864
Data source: Isola 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 Isola Compares to Other Months

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

This table compares monthly weather conditions in Isola, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather8°C (47°F)121 mm (4.8 inches)84%moderate
February Weather11°C (51°F)189 mm (7.4 inches)83%high
March Weather15°C (60°F)162 mm (6.4 inches)80%very high
April Weather18°C (65°F)161 mm (6.4 inches)82%extreme
May Weather23°C (74°F)114 mm (4.5 inches)83%extreme
June Weather26°C (80°F)104 mm (4.1 inches)80%extreme
July Weather28°C (83°F)96 mm (3.8 inches)80%extreme
August Weather28°C (82°F)111 mm (4.4 inches)75%extreme
September Weather26°C (79°F)98 mm (3.9 inches)73%very high
October Weather20°C (68°F)120 mm (4.7 inches)76%very high
November Weather12°C (54°F)92 mm (3.6 inches)84%high
December Weather11°C (52°F)123 mm (4.9 inches)88%moderate

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