December Weather in Irondale, United States

Last updated: June 24, 2025

In December, the average temperature in Irondale, United States hovers around 9°C (49°F). Expect a chill in the air, with minimums dipping to -5°C (22°F) and maximums reaching a pleasant 24°C (76°F). Be prepared for 133 mm (5.2 in) of precipitation spread across approximately 11 days, contributing to an average humidity of 89%. Perfect for cozy indoor activities or bundling up for an adventurous day out!

December Temperature in Irondale

In December in Irondale, the average temperature is 9°C (49°F), with maximums reaching 24°C (76°F) and minimums dropping as low as -5°C (22°F). Travelers should be prepared for a wide range of weather conditions during this month.

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

The chart illustrates December temperature patterns in Irondale, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Irondale, December typically has an average temperature of 9°C (49°F), with highs reaching up to 24°C (76°F) and lows dropping to around -5°C (22°F).

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

December Precipitation in Irondale

In Irondale in December, the precipitation amount is 133 mm (5.2 in) spread over a period of 11 days.

December Precipitation Trends in Irondale

The chart displays monthly precipitation patterns in Irondale, 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 Irondale, December typically receives around 133 mm (5.2 inches) of precipitation spread over approximately 11 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 Irondale

In Irondale in December, humidity is 89%. With an average temperature of 9°C (49°F), this humidity feels like a persistent dampness that clings to your clothes and skin, making it challenging to stay comfortable while traveling.

December Average Humidity in Irondale

This chart illustrates the average monthly humidity levels in Irondale, 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 Irondale is approximately 89%, 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 Irondale

In Irondale 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 Irondale for better planning.

Maximum UV Index Levels in Irondale for December

The chart shows the monthly maximum UV Index (UVI) for Irondale 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 Irondale typically reaches 4, which falls under the moderate exposure category.

Data source: Irondale 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 Irondale Compares to Other Months

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

This table compares monthly weather conditions in Irondale, showing how December’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (46°F)	101 mm (4.0 inches)	86%	moderate
February Weather	11°C (52°F)	133 mm (5.2 inches)	84%	high
March Weather	14°C (57°F)	113 mm (4.5 inches)	83%	very high
April Weather	17°C (63°F)	115 mm (4.5 inches)	81%	extreme
May Weather	22°C (72°F)	93 mm (3.7 inches)	81%	extreme
June Weather	25°C (77°F)	116 mm (4.6 inches)	81%	extreme
July Weather	27°C (80°F)	103 mm (4.1 inches)	83%	extreme
August Weather	26°C (79°F)	140 mm (5.5 inches)	81%	very high
September Weather	24°C (76°F)	109 mm (4.3 inches)	82%	very high
October Weather	19°C (67°F)	110 mm (4.3 inches)	78%	very high
November Weather	12°C (53°F)	79 mm (3.1 inches)	86%	high
December Weather	9°C (49°F)	133 mm (5.2 inches)	89%	moderate