May Weather in Cool, United States

Last updated: June 24, 2025

In May, the average temperature in Cool, United States hovers around 18°C (65°F). However, visitors should be prepared for a temperature range that can dip to a chilly 3°C (38°F) and soar to a sweltering 36°C (96°F). Expect 62 mm (2.4 in) of precipitation spread over approximately 5 days, with an average humidity of 74%, creating a warm and occasionally damp atmosphere.

May Temperature in Cool

In May in Cool, the average temperature is 18°C (65°F), with maximums reaching 36°C (96°F) and minimums as low as 3°C (38°F). This diverse temperature range makes it essential for travelers to pack layers to stay comfortable throughout the day and evening.

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

The chart illustrates May temperature patterns in Cool, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Cool, May typically has an average temperature of 18°C (65°F), with highs reaching up to 36°C (96°F) and lows dropping to around 3°C (38°F).

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

May Precipitation in Cool

In Cool in May, the total precipitation amount is 62 mm (2.4 in) over the course of 5 days.

May Precipitation Trends in Cool

The chart displays monthly precipitation patterns in Cool, 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 Cool, May typically receives around 62 mm (2.4 inches) of precipitation spread over approximately 5 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 Cool

In Cool in May humidity is 74%. With an average temperature of 18°C (65°F), this humidity feels like a warm, sticky embrace that can make even short walks feel laborious, leading travelers to seek shade and refreshment more often.

May Average Humidity in Cool

This chart illustrates the average monthly humidity levels in Cool, 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 Cool is approximately 74%, 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 Cool

In Cool 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 Cool.

Maximum UV Index Levels in Cool for May

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

Data source: Cool 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 Cool Compares to Other Months

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

This table compares monthly weather conditions in Cool, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	227 mm (8.9 inches)	84%	moderate
February Weather	9°C (49°F)	230 mm (9.1 inches)	84%	moderate
March Weather	11°C (52°F)	237 mm (9.3 inches)	83%	high
April Weather	14°C (58°F)	112 mm (4.4 inches)	81%	very high
May Weather	18°C (65°F)	62 mm (2.4 inches)	74%	very high
June Weather	23°C (74°F)	8 mm (0.3 inches)	64%	extreme
July Weather	27°C (80°F)	0 mm (0.0 inches)	44%	extreme
August Weather	26°C (79°F)	0 mm (0.0 inches)	36%	very high
September Weather	23°C (73°F)	17 mm (0.7 inches)	44%	very high
October Weather	17°C (63°F)	67 mm (2.7 inches)	65%	high
November Weather	11°C (53°F)	131 mm (5.1 inches)	84%	moderate
December Weather	8°C (47°F)	178 mm (7.0 inches)	83%	moderate