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December Weather in Hilmar-Irwin, United States

Last updated: June 24, 2025

The average temperature in Hilmar-Irwin, United States during December is a mild 10°C (50°F). However, be prepared for a range of weather as temperatures can drop to a chilly -2°C (29°F) or rise to a warm 22°C (73°F). With 87 mm (3.4 in) of precipitation spread over approximately 8 days, you might want to carry an umbrella. High humidity levels at 80% can also make the air feel quite different, so plan accordingly!

December Temperature in Hilmar-Irwin

In December in Hilmar-Irwin, the average temperature is 10°C (50°F), with a maximum that can reach 22°C (73°F) and a minimum that can drop to -2°C (29°F). This varied climate makes Hilmar-Irwin a great destination for travelers seeking both comfortable days and cooler evenings.

December Weather in Hilmar-Irwin: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Hilmar-Irwin, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Hilmar-Irwin, December typically has an average temperature of 10°C (50°F), with highs reaching up to 22°C (73°F) and lows dropping to around -2°C (29°F).
JanFebMarAprMayJunJulAugSepOctNovDec505257647180848277665650
Data source: Temperature data for Hilmar-Irwin 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 Hilmar-Irwin

In Hilmar-Irwin in December, the precipitation amount is 87 mm (3.4 in), which occurs over a span of 8 days.

December Precipitation Trends in Hilmar-Irwin

The chart displays monthly precipitation patterns in Hilmar-Irwin, 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 Hilmar-Irwin, December typically receives around 87 mm (3.4 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec93728134212001173487
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Hilmar-Irwin

In Hilmar-Irwin in December, humidity is 80%. With an average temperature of 10°C (50°F), this humidity feels like a damp chill enveloping you, making traveling somewhat uncomfortable as it seeps into your clothes and clings to your skin, leaving you longing for a cozy indoor refuge.

December Average Humidity in Hilmar-Irwin

This chart illustrates the average monthly humidity levels in Hilmar-Irwin, 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 Hilmar-Irwin is approximately 80%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec82%84%82%78%71%64%59%54%55%62%78%80%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Hilmar-Irwin

In Hilmar-Irwin 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 Hilmar-Irwin, you can check the information here.

Maximum UV Index Levels in Hilmar-Irwin for December

The chart shows the monthly maximum UV Index (UVI) for Hilmar-Irwin 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 Hilmar-Irwin typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec3588101111109643
Data source: Hilmar-Irwin 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 Hilmar-Irwin Compares to Other Months

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

This table compares monthly weather conditions in Hilmar-Irwin, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather10°C (51°F)93 mm (3.6 inches)82%moderate
February Weather11°C (53°F)72 mm (2.8 inches)84%moderate
March Weather14°C (57°F)81 mm (3.2 inches)82%very high
April Weather18°C (64°F)33 mm (1.3 inches)78%very high
May Weather22°C (71°F)21 mm (0.8 inches)71%very high
June Weather26°C (80°F)2 mm (0.1 inches)64%extreme
July Weather29°C (84°F)0 mm (0.0 inches)58%extreme
August Weather28°C (82°F)0 mm (0.0 inches)54%very high
September Weather25°C (77°F)1 mm (0.1 inches)55%very high
October Weather19°C (67°F)16 mm (0.6 inches)62%high
November Weather13°C (56°F)34 mm (1.4 inches)78%moderate
December Weather10°C (50°F)87 mm (3.4 inches)80%moderate

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