December Weather in Iona, United States

Last updated: June 24, 2025

In December, the average temperature in Iona, United States is a pleasant 20°C (68°F), with a minimum dipping to 8°C (46°F) and a maximum reaching 27°C (81°F). Expect about 52 mm (2.1 in) of precipitation spread over 6 days, contributing to an average humidity of 84%. Stay prepared for a mix of mild weather and occasional rain!

December Temperature in Iona

In December in Iona, the average temperature is 20°C (68°F). The maximum can reach 27°C (81°F), while the minimum can drop as low as 8°C (46°F). This makes it a perfect time for travelers to enjoy pleasant outdoor activities and sightseeing.

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

The chart illustrates December temperature patterns in Iona, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iona, December typically has an average temperature of 20°C (68°F), with highs reaching up to 27°C (81°F) and lows dropping to around 8°C (46°F).

Data source: Temperature data for Iona generated using information from the Copernicus Climate Change Service.

December Precipitation in Iona

In Iona in December, the precipitation amount is 52 mm (2.1 in) over the course of 6 days.

December Precipitation Trends in Iona

The chart displays monthly precipitation patterns in Iona, 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 Iona, December typically receives around 52 mm (2.1 inches) of precipitation spread over approximately 6 days.

Data source: Precipitation data for December generated using information from the Copernicus Climate Change Service.

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

December Humidity in Iona

In Iona in December humidity is 84%. With an average temperature of 20°C (68°F), this humidity feels like a warm, enveloping blanket, making travel a challenge as the air clings to your skin, and every step feels heavier in the mugginess.

December Average Humidity in Iona

This chart illustrates the average monthly humidity levels in Iona, 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 Iona is approximately 84%, offering insight into how humid the weather typically is during this month.

Data source: Humidity data for December generated using information from the Copernicus Climate Change Service.

December UV Index in Iona

In Iona in December, the maximum UV index is 6, which corresponds to a high Exposure Category. The time to burn is approximately 25 minutes. To find the hourly UV index in Iona, you can refer to this Hourly UV Index in Iona.

Maximum UV Index Levels in Iona for December

The chart shows the monthly maximum UV Index (UVI) for Iona 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 Iona typically reaches 6, which falls under the high exposure category.

Data source: Iona 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 Iona Compares to Other Months

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

This table compares monthly weather conditions in Iona, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	18°C (65°F)	36 mm (1.4 inches)	83%	high
February Weather	21°C (69°F)	36 mm (1.4 inches)	80%	very high
March Weather	21°C (71°F)	22 mm (0.9 inches)	75%	very high
April Weather	24°C (76°F)	42 mm (1.7 inches)	68%	extreme
May Weather	26°C (79°F)	122 mm (4.8 inches)	65%	extreme
June Weather	27°C (82°F)	170 mm (6.7 inches)	73%	extreme
July Weather	28°C (83°F)	195 mm (7.7 inches)	77%	extreme
August Weather	28°C (83°F)	206 mm (8.1 inches)	80%	extreme
September Weather	28°C (82°F)	169 mm (6.7 inches)	83%	extreme
October Weather	26°C (80°F)	76 mm (3.0 inches)	83%	very high
November Weather	23°C (73°F)	44 mm (1.7 inches)	83%	very high
December Weather	20°C (68°F)	52 mm (2.1 inches)	84%	high