March Weather in Waterloo, United States

Last updated: June 24, 2025

In March, the average temperature in Waterloo, United States hovers around 5°C (41°F), with temperatures ranging from a chilly -20°C (-4°F) to a balmy 27°C (81°F). Expect 97 mm (3.8 in) of precipitation over 9 days, contributing to an average humidity of 73%.

March Temperature in Waterloo

In March in Waterloo, the average temperature is 5°C (41°F). Maximums can reach 27°C (81°F), while minimums can be as low as -20°C (-4°F). Be prepared for a wide range of temperatures when traveling during this time.

March Weather in Waterloo: Daily Temperature Highs, Lows, and Averages

The chart illustrates March temperature patterns in Waterloo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Waterloo, March typically has an average temperature of 5°C (41°F), with highs reaching up to 27°C (81°F) and lows dropping to around -20°C (-4°F).

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

March Precipitation in Waterloo

In Waterloo in March, the total precipitation amount reaches 97 mm (3.8 in) over the course of 9 days.

March Precipitation Trends in Waterloo

The chart displays monthly precipitation patterns in Waterloo, with values for each month alongside March’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how March’s conditions compare to those of other months. In Waterloo, March typically receives around 97 mm (3.8 inches) of precipitation spread over approximately 9 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

March Humidity in Waterloo

In Waterloo in March, humidity is 73%. With an average temperature of 5°C (41°F), this humidity makes traveling feel quite chilly and damp, which can be uncomfortable for long periods outdoors.

March Average Humidity in Waterloo

This chart illustrates the average monthly humidity levels in Waterloo, with March’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In March, average humidity in Waterloo is approximately 73%, offering insight into how humid the weather typically is during this month.

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

March UV Index in Waterloo

In Waterloo in March, 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 Waterloo, you can refer to this Hourly UV Index in Waterloo.

Maximum UV Index Levels in Waterloo for March

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

Data source: Waterloo March 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 March Weather in Waterloo Compares to Other Months

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

This table compares monthly weather conditions in Waterloo, showing how March’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (25°F)	32 mm (1.3 inches)	76%	moderate
February Weather	-4°C (26°F)	30 mm (1.2 inches)	80%	moderate
March Weather	5°C (41°F)	97 mm (3.8 inches)	73%	high
April Weather	10°C (51°F)	54 mm (2.1 inches)	74%	very high
May Weather	17°C (63°F)	146 mm (5.8 inches)	78%	very high
June Weather	24°C (76°F)	126 mm (5.0 inches)	82%	very high
July Weather	26°C (78°F)	74 mm (2.9 inches)	83%	very high
August Weather	24°C (75°F)	100 mm (4.0 inches)	80%	very high
September Weather	21°C (70°F)	83 mm (3.3 inches)	75%	very high
October Weather	11°C (53°F)	115 mm (4.5 inches)	75%	high
November Weather	5°C (40°F)	31 mm (1.2 inches)	82%	moderate
December Weather	0°C (32°F)	40 mm (1.6 inches)	83%	low