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December Weather in Ames, United States

Last updated: June 24, 2025

In December, the average temperature in Ames, United States is a cool 12°C (53°F), with temperatures ranging from a brisk -4°C (25°F) to a warm 30°C (87°F). Expect about 50 mm (2.0 in) of precipitation spread over 6 days, contributing to an average humidity of 87% that adds to the region's character.

December Temperature in Ames

In December in Ames, the average temperature is 12°C (53°F). Maximum temperatures can reach 30°C (87°F), while minimums can drop as low as -4°C (25°F). Travelers should be prepared for a wide range of temperatures during this time.

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

The chart illustrates December temperature patterns in Ames, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ames, December typically has an average temperature of 12°C (53°F), with highs reaching up to 30°C (87°F) and lows dropping to around -4°C (25°F).
JanFebMarAprMayJunJulAugSepOctNovDec495162677582868679695853
Data source: Temperature data for Ames 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 Ames

In Ames in December, the precipitation amount is 50 mm (2.0 in) over the course of 6 days.

December Precipitation Trends in Ames

The chart displays monthly precipitation patterns in Ames, 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 Ames, December typically receives around 50 mm (2.0 inches) of precipitation spread over approximately 6 days.
JanFebMarAprMayJunJulAugSepOctNovDec49697889171745179861294150
Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.
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December Humidity in Ames

In Ames in December, humidity is 87%. With an average temperature of 12°C (53°F), this humidity feels like a damp blanket enveloping you, making travel uncomfortable and stifling, as the air thickens and clings to your skin, sapping your energy as you navigate the sights.

December Average Humidity in Ames

This chart illustrates the average monthly humidity levels in Ames, 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 Ames 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 Ames

In Ames 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 Ames for better planning.

Maximum UV Index Levels in Ames for December

The chart shows the monthly maximum UV Index (UVI) for Ames 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 Ames typically reaches 4, which falls under the moderate exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec478101112121110864
Data source: Ames 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 Ames Compares to Other Months

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

This table compares monthly weather conditions in Ames, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather9°C (49°F)49 mm (1.9 inches)78%moderate
February Weather10°C (51°F)69 mm (2.7 inches)78%high
March Weather17°C (62°F)78 mm (3.1 inches)77%very high
April Weather19°C (67°F)89 mm (3.5 inches)78%very high
May Weather24°C (75°F)171 mm (6.7 inches)82%extreme
June Weather28°C (82°F)74 mm (2.9 inches)78%extreme
July Weather30°C (86°F)51 mm (2.0 inches)69%extreme
August Weather30°C (86°F)79 mm (3.1 inches)63%extreme
September Weather26°C (80°F)86 mm (3.4 inches)66%very high
October Weather21°C (69°F)129 mm (5.1 inches)73%very high
November Weather14°C (58°F)41 mm (1.6 inches)84%high
December Weather12°C (53°F)50 mm (2.0 inches)87%moderate

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