May Weather in Onalaska, United States

Last updated: June 24, 2025

In May, the average temperature in Onalaska, United States hovers around 24°C (76°F). You can expect a minimum of 14°C (57°F) and a maximum of 35°C (95°F). Be prepared for some rainfall, as precipitation averages 174 mm (6.8 in) spread over 12 days. With an average humidity of 81%, it’s safe to say that the air will feel quite tropical!

May Temperature in Onalaska

In May in Onalaska, the average temperature is 24°C (76°F). The maximum can reach 35°C (95°F), while the minimum can drop to as low as 14°C (57°F). This pleasant weather makes Onalaska an ideal destination for travelers looking to enjoy a comfortable climate.

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

The chart illustrates May temperature patterns in Onalaska, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Onalaska, May typically has an average temperature of 24°C (76°F), with highs reaching up to 35°C (95°F) and lows dropping to around 14°C (57°F).

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

May Precipitation in Onalaska

In Onalaska in May, the total precipitation amount is 174 mm (6.8 in), recorded over the course of 12 days.

May Precipitation Trends in Onalaska

The chart displays monthly precipitation patterns in Onalaska, 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 Onalaska, May typically receives around 174 mm (6.8 inches) of precipitation spread over approximately 12 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 Onalaska

In Onalaska in May, humidity is 81%. With an average temperature of 24°C (76°F), this humidity feels like a warm, muggy embrace that can make outdoor activities feel exhausting, leaving travelers in need of frequent breaks and plenty of hydration.

May Average Humidity in Onalaska

This chart illustrates the average monthly humidity levels in Onalaska, 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 Onalaska is approximately 81%, 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 Onalaska

In Onalaska in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Onalaska.

Maximum UV Index Levels in Onalaska for May

The chart shows the monthly maximum UV Index (UVI) for Onalaska 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 Onalaska typically reaches 11, which falls under the extreme exposure category.

Data source: Onalaska 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 Onalaska Compares to Other Months

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

This table compares monthly weather conditions in Onalaska, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	11°C (52°F)	107 mm (4.2 inches)	79%	moderate
February Weather	13°C (55°F)	112 mm (4.4 inches)	80%	very high
March Weather	17°C (64°F)	97 mm (3.8 inches)	78%	very high
April Weather	20°C (68°F)	115 mm (4.5 inches)	79%	extreme
May Weather	24°C (76°F)	174 mm (6.8 inches)	81%	extreme
June Weather	27°C (82°F)	135 mm (5.3 inches)	77%	extreme
July Weather	28°C (84°F)	90 mm (3.5 inches)	71%	extreme
August Weather	29°C (84°F)	152 mm (6.0 inches)	67%	extreme
September Weather	27°C (80°F)	137 mm (5.4 inches)	69%	very high
October Weather	22°C (71°F)	117 mm (4.6 inches)	73%	very high
November Weather	16°C (60°F)	71 mm (2.8 inches)	82%	high
December Weather	13°C (56°F)	111 mm (4.4 inches)	87%	moderate