January Weather in Iowa, United States

Last updated: June 24, 2025

In January, the average temperature in Iowa, United States hovers around 12°C (53°F). Expect a range from a chilly -8°C (18°F) to a warm 27°C (81°F). During this month, 117 mm (4.6 in) of precipitation falls over 8 days, contributing to an average humidity of 81%.

January Temperature in Iowa

In January in Iowa, the average temperature is 12°C (53°F). The maximum can reach 27°C (81°F) and the minimum can be as low as -8°C (18°F). This variability in temperature makes it important for travelers to pack accordingly to enjoy their time in Iowa.

January Weather in Iowa: Daily Temperature Highs, Lows, and Averages

The chart illustrates January temperature patterns in Iowa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iowa, January typically has an average temperature of 12°C (53°F), with highs reaching up to 27°C (81°F) and lows dropping to around -8°C (18°F).

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

January Precipitation in Iowa

In Iowa in January, the total precipitation amount is 117 mm (4.6 in) over a span of 8 days.

January Precipitation Trends in Iowa

The chart displays monthly precipitation patterns in Iowa, with values for each month alongside January’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how January’s conditions compare to those of other months. In Iowa, January typically receives around 117 mm (4.6 inches) of precipitation spread over approximately 8 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

January Humidity in Iowa

In Iowa in January, humidity is 81%. With an average temperature of 12°C (53°F), this humidity feels like a chilly dampness enveloping you, making outdoor activities uncomfortable and requiring layers to stay warm while you explore.

January Average Humidity in Iowa

This chart illustrates the average monthly humidity levels in Iowa, with January’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In January, average humidity in Iowa is approximately 81%, offering insight into how humid the weather typically is during this month.

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

January UV Index in Iowa

In Iowa in January, the maximum UV index reaches 5, which corresponds to a moderate Exposure Category. Under these conditions, the estimated time to burn is approximately 30 minutes. For more details, you can check the Hourly UV Index in Iowa.

Maximum UV Index Levels in Iowa for January

The chart shows the monthly maximum UV Index (UVI) for Iowa in January, 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 January, the maximum UV index in Iowa typically reaches 5, which falls under the moderate exposure category.

Data source: Iowa January 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 January Weather in Iowa Compares to Other Months

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

This table compares monthly weather conditions in Iowa, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (53°F)	117 mm (4.6 inches)	81%	moderate
February Weather	14°C (58°F)	107 mm (4.2 inches)	81%	very high
March Weather	18°C (65°F)	70 mm (2.7 inches)	79%	very high
April Weather	20°C (69°F)	155 mm (6.1 inches)	80%	very high
May Weather	25°C (77°F)	193 mm (7.6 inches)	81%	extreme
June Weather	27°C (81°F)	163 mm (6.4 inches)	76%	extreme
July Weather	28°C (83°F)	158 mm (6.2 inches)	73%	extreme
August Weather	28°C (83°F)	179 mm (7.1 inches)	71%	extreme
September Weather	26°C (80°F)	163 mm (6.4 inches)	72%	very high
October Weather	22°C (72°F)	122 mm (4.8 inches)	73%	very high
November Weather	16°C (60°F)	75 mm (2.9 inches)	83%	high
December Weather	14°C (57°F)	119 mm (4.7 inches)	88%	moderate