January Weather in Ottumwa, United States

Last updated: June 24, 2025

In Ottumwa, United States, the average temperature in January hovers around -4°C (24°F), with extremes ranging from a chilling -29°C (-21°F) to a milder 14°C (58°F). During this time, expect about 50 mm (2.0 in) of precipitation spread over 7 days, accompanied by an average humidity of 78%. Stay warm and be prepared for the wet conditions!

January Temperature in Ottumwa

In January in Ottumwa, the average temperature is -4°C (24°F). The maximum can reach 14°C (58°F), while the minimum can drop as low as -29°C (-21°F). Travelers should be prepared for a wide range of temperatures, ensuring they dress in layers to stay comfortable during their visit.

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

The chart illustrates January temperature patterns in Ottumwa, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Ottumwa, January typically has an average temperature of -4°C (24°F), with highs reaching up to 14°C (58°F) and lows dropping to around -29°C (-21°F).

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

January Precipitation in Ottumwa

In Ottumwa in January, the precipitation amount is 50 mm (2.0 in) over a span of 7 days.

January Precipitation Trends in Ottumwa

The chart displays monthly precipitation patterns in Ottumwa, 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 Ottumwa, January typically receives around 50 mm (2.0 inches) of precipitation spread over approximately 7 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 Ottumwa

In Ottumwa in January humidity is 78%. With an average temperature of -4°C (24°F), this humidity feels like an icy mist clinging to your skin, making each breath sharp and crisp, making travel both exhilarating and challenging as the cold air bites through damp layers.

January Average Humidity in Ottumwa

This chart illustrates the average monthly humidity levels in Ottumwa, 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 Ottumwa is approximately 78%, 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 Ottumwa

In Ottumwa in January, 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 Ottumwa, you can check the information here.

Maximum UV Index Levels in Ottumwa for January

The chart shows the monthly maximum UV Index (UVI) for Ottumwa 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 Ottumwa typically reaches 3, which falls under the moderate exposure category.

Data source: Ottumwa 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 Ottumwa Compares to Other Months

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

This table compares monthly weather conditions in Ottumwa, showing how January’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (24°F)	50 mm (2.0 inches)	78%	moderate
February Weather	-3°C (27°F)	50 mm (2.0 inches)	80%	moderate
March Weather	5°C (41°F)	93 mm (3.7 inches)	77%	high
April Weather	10°C (51°F)	77 mm (3.0 inches)	77%	very high
May Weather	17°C (64°F)	151 mm (5.9 inches)	77%	very high
June Weather	24°C (75°F)	137 mm (5.4 inches)	81%	extreme
July Weather	25°C (78°F)	74 mm (2.9 inches)	81%	very high
August Weather	24°C (75°F)	75 mm (3.0 inches)	77%	very high
September Weather	21°C (69°F)	129 mm (5.1 inches)	73%	very high
October Weather	12°C (54°F)	125 mm (4.9 inches)	75%	high
November Weather	4°C (40°F)	53 mm (2.1 inches)	85%	moderate
December Weather	0°C (33°F)	40 mm (1.6 inches)	83%	moderate