May Weather in Marengo, United States

Last updated: June 24, 2025

In May, the average temperature in Marengo, United States is a pleasant 20°C (67°F). However, temperatures can range from a chilly 1°C (34°F) to a sweltering 33°C (91°F). Expect about 139 mm (5.5 in) of precipitation spread over 14 days, contributing to an average humidity of 79%.

May Temperature in Marengo

In May in Marengo, the average temperature is 20°C (67°F). Maximum can reach 33°C (91°F) and minimum can be as low as 1°C (34°F). This weather makes it a great time for travelers to enjoy a mix of warm days and cool evenings.

May Weather in Marengo: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Marengo, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Marengo, May typically has an average temperature of 20°C (67°F), with highs reaching up to 33°C (91°F) and lows dropping to around 1°C (34°F).

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

May Precipitation in Marengo

In Marengo, in May, the precipitation amount is 139 mm (5.5 in) over the course of 14 days.

May Precipitation Trends in Marengo

The chart displays monthly precipitation patterns in Marengo, with values for each month alongside May’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how May’s conditions compare to those of other months. In Marengo, May typically receives around 139 mm (5.5 inches) of precipitation spread over approximately 14 days.

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

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Millimeters (mm) Inches (in)

May Humidity in Marengo

In Marengo in May, humidity is 79%. With an average temperature of 20°C (67°F), this humidity feels like a warm, heavy blanket wrapping around you, making traveling a bit sluggish and requiring frequent breaks to stay refreshed.

May Average Humidity in Marengo

This chart illustrates the average monthly humidity levels in Marengo, with May’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In May, average humidity in Marengo is approximately 79%, offering insight into how humid the weather typically is during this month.

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

May UV Index in Marengo

In Marengo in May, the maximum UV index reaches 10, which corresponds to a very high Exposure Category. With a time to burn of just 15 minutes, it's crucial to take precautions. For more detailed information, you can check the Hourly UV Index in Marengo.

Maximum UV Index Levels in Marengo for May

The chart shows the monthly maximum UV Index (UVI) for Marengo in May, 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 May, the maximum UV index in Marengo typically reaches 10, which falls under the very high exposure category.

Data source: Marengo May 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 May Weather in Marengo Compares to Other Months

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

This table compares monthly weather conditions in Marengo, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	2°C (35°F)	89 mm (3.5 inches)	87%	moderate
February Weather	4°C (39°F)	127 mm (5.0 inches)	85%	moderate
March Weather	9°C (48°F)	136 mm (5.4 inches)	86%	high
April Weather	13°C (56°F)	135 mm (5.3 inches)	84%	very high
May Weather	20°C (67°F)	139 mm (5.5 inches)	79%	very high
June Weather	24°C (75°F)	146 mm (5.8 inches)	82%	extreme
July Weather	26°C (79°F)	98 mm (3.9 inches)	79%	very high
August Weather	25°C (76°F)	93 mm (3.7 inches)	70%	very high
September Weather	22°C (72°F)	104 mm (4.1 inches)	69%	very high
October Weather	16°C (60°F)	106 mm (4.2 inches)	76%	high
November Weather	7°C (45°F)	94 mm (3.7 inches)	88%	moderate
December Weather	5°C (41°F)	108 mm (4.3 inches)	87%	moderate