nomadseason

December Weather in Siren, United States

Last updated: June 24, 2025

In December, the average temperature in Siren, United States hovers around -6°C (22°F), with extremes ranging from a chilly -28°C (-18°F) to a mild 14°C (58°F). Expect about 56 mm (2.2 in) of precipitation spread over 8 days, contributing to a high average humidity of 84%. Stay prepared for the cold!

December Temperature in Siren

In December in Siren, the average temperature is -6°C (22°F). Maximum temperatures can reach up to 14°C (58°F), while the minimum can plummet to as low as -28°C (-18°F). Be prepared for a wide range of temperatures when traveling to Siren during this time.

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

The chart illustrates December temperature patterns in Siren, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Siren, December typically has an average temperature of -6°C (22°F), with highs reaching up to 14°C (58°F) and lows dropping to around -28°C (-18°F).
JanFebMarAprMayJunJulAugSepOctNovDec151531425769726962473222
Data source: Temperature data for Siren generated using information from the Copernicus Climate Change Service.
Choose your preferred temperature unit
The average of daily temperatures (24 hours) calculated across all days in the month.

December Precipitation in Siren

In Siren in December, the precipitation amount is 56 mm (2.2 in) over the course of 8 days.

December Precipitation Trends in Siren

The chart displays monthly precipitation patterns in Siren, 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 Siren, December typically receives around 56 mm (2.2 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec223248911079010012697994056
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
Choose your preferred precipitation unit

December Humidity in Siren

In Siren in December humidity is 84%. With an average temperature of -6°C (22°F), this humidity feels like an unpleasant chill that seeps into your bones, making travel feel much more uncomfortable and harsh than the temperature alone suggests.

December Average Humidity in Siren

This chart illustrates the average monthly humidity levels in Siren, 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 Siren is approximately 84%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec87%90%85%84%78%80%81%81%81%84%88%84%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Siren

In Siren in December, the maximum UV index is 2, which corresponds to a low exposure category. With this level of UV radiation, the time to burn is approximately 45 minutes. To learn more about the hourly UV index in Siren, you can visit Hourly UV Index in Siren.

Maximum UV Index Levels in Siren for December

The chart shows the monthly maximum UV Index (UVI) for Siren 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 Siren typically reaches 2, which falls under the low exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec2457910997532
Data source: Siren 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 Siren Compares to Other Months

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

This table compares monthly weather conditions in Siren, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-10°C (15°F)22 mm (0.9 inches)87%low
February Weather-9°C (16°F)32 mm (1.3 inches)90%moderate
March Weather0°C (32°F)48 mm (1.9 inches)85%moderate
April Weather5°C (42°F)91 mm (3.6 inches)84%high
May Weather14°C (58°F)107 mm (4.2 inches)78%very high
June Weather21°C (69°F)90 mm (3.6 inches)80%very high
July Weather22°C (73°F)100 mm (3.9 inches)81%very high
August Weather21°C (69°F)126 mm (5.0 inches)81%very high
September Weather17°C (63°F)97 mm (3.8 inches)81%high
October Weather8°C (47°F)99 mm (3.9 inches)84%moderate
November Weather0°C (32°F)40 mm (1.6 inches)88%moderate
December Weather-6°C (22°F)56 mm (2.2 inches)84%low

Compare Siren's Climate with Cities Worldwide