May Weather in Grantsville, United States

Last updated: June 24, 2025

In Grantsville, United States, the average temperature in May is a pleasant 15°C (60°F). However, be prepared for a range of temperatures, with a minimum dipping to -1°C (30°F) and a maximum soaring to 35°C (95°F). During this month, expect 49 mm (1.9 in) of precipitation spread over about 10 days, alongside an average humidity of 59%.

May Temperature in Grantsville

In May in Grantsville, the average temperature is 15°C (60°F). Maximums can reach 35°C (95°F), while minimums can drop to as low as -1°C (30°F). Travelers should pack for a wide range of temperatures to ensure comfort during their visit.

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

The chart illustrates May temperature patterns in Grantsville, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Grantsville, May typically has an average temperature of 15°C (60°F), with highs reaching up to 35°C (95°F) and lows dropping to around -1°C (30°F).

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

May Precipitation in Grantsville

In Grantsville in May, the total precipitation amount is 49 mm (1.9 in) over the course of 10 days.

May Precipitation Trends in Grantsville

The chart displays monthly precipitation patterns in Grantsville, 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 Grantsville, May typically receives around 49 mm (1.9 inches) of precipitation spread over approximately 10 days.

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

Choose your preferred precipitation unit

Millimeters (mm) Inches (in)

May Humidity in Grantsville

In Grantsville in May, humidity is 59%. With an average temperature of 15°C (60°F), this humidity feels like a refreshing embrace, perfect for exploring the vibrant streets and enjoying the local sights without feeling too fatigued.

May Average Humidity in Grantsville

This chart illustrates the average monthly humidity levels in Grantsville, 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 Grantsville is approximately 59%, 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 Grantsville

In Grantsville 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 Grantsville.

Maximum UV Index Levels in Grantsville for May

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

Data source: Grantsville 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 Grantsville Compares to Other Months

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

This table compares monthly weather conditions in Grantsville, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-1°C (31°F)	40 mm (1.6 inches)	85%	moderate
February Weather	1°C (34°F)	47 mm (1.8 inches)	86%	moderate
March Weather	6°C (43°F)	61 mm (2.4 inches)	79%	high
April Weather	10°C (50°F)	56 mm (2.2 inches)	71%	very high
May Weather	15°C (60°F)	49 mm (1.9 inches)	59%	extreme
June Weather	23°C (73°F)	14 mm (0.5 inches)	55%	extreme
July Weather	27°C (81°F)	16 mm (0.6 inches)	44%	extreme
August Weather	26°C (78°F)	18 mm (0.7 inches)	34%	extreme
September Weather	20°C (68°F)	31 mm (1.2 inches)	42%	very high
October Weather	10°C (51°F)	33 mm (1.3 inches)	63%	high
November Weather	5°C (41°F)	27 mm (1.1 inches)	81%	moderate
December Weather	-1°C (31°F)	36 mm (1.4 inches)	84%	moderate