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December Weather in Spanish Fork, United States

Last updated: June 24, 2025

In December, the average temperature in Spanish Fork, United States is a chilly -3°C (26°F), with minimums plunging to -20°C (-4°F) and maximums reaching a mild 14°C (58°F). Expect about 49 mm (1.9 in) of precipitation over 10 days, while humidity hovers around a brisk 87%.

December Temperature in Spanish Fork

In December in Spanish Fork, the average temperature is -3°C (26°F), with maximums reaching 14°C (58°F) and minimums plummeting as low as -20°C (-4°F). Travelers should be prepared for a wide range of temperatures, from chilly days to potentially severe cold nights.

December Weather in Spanish Fork: Daily Temperature Highs, Lows, and Averages

The chart illustrates December temperature patterns in Spanish Fork, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Spanish Fork, December typically has an average temperature of -3°C (26°F), with highs reaching up to 14°C (58°F) and lows dropping to around -20°C (-4°F).
JanFebMarAprMayJunJulAugSepOctNovDec242837465771797666483926
Data source: Temperature data for Spanish Fork 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 Spanish Fork

In Spanish Fork in December, the total precipitation amount is 49 mm (1.9 in) over the course of 10 days.

December Precipitation Trends in Spanish Fork

The chart displays monthly precipitation patterns in Spanish Fork, 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 Spanish Fork, December typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 10 days.
JanFebMarAprMayJunJulAugSepOctNovDec535560474211101723373249
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Spanish Fork

In Spanish Fork in December, humidity is 87%. With an average temperature of -3°C (26°F), this humidity feels like walking through a thick fog, making travels uncomfortable and adding a chill that seeps into your bones.

December Average Humidity in Spanish Fork

This chart illustrates the average monthly humidity levels in Spanish Fork, 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 Spanish Fork is approximately 87%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec88%88%77%70%54%45%37%34%47%67%82%87%
Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Spanish Fork

In Spanish Fork 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 Spanish Fork, you can check the information here.

Maximum UV Index Levels in Spanish Fork for December

The chart shows the monthly maximum UV Index (UVI) for Spanish Fork 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 Spanish Fork typically reaches 3, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec46910111212119753
Data source: Spanish Fork 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 Spanish Fork Compares to Other Months

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

This table compares monthly weather conditions in Spanish Fork, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-4°C (25°F)53 mm (2.1 inches)87%moderate
February Weather-2°C (29°F)55 mm (2.2 inches)88%high
March Weather3°C (37°F)60 mm (2.4 inches)77%very high
April Weather8°C (46°F)47 mm (1.9 inches)69%very high
May Weather14°C (57°F)41 mm (1.6 inches)54%extreme
June Weather22°C (71°F)11 mm (0.4 inches)45%extreme
July Weather26°C (79°F)10 mm (0.4 inches)37%extreme
August Weather24°C (76°F)17 mm (0.7 inches)34%extreme
September Weather19°C (66°F)23 mm (0.9 inches)47%very high
October Weather9°C (49°F)37 mm (1.5 inches)67%high
November Weather4°C (39°F)32 mm (1.3 inches)82%moderate
December Weather-3°C (26°F)49 mm (1.9 inches)87%moderate

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