May Weather in Sully, United States

Last updated: June 24, 2025

In Sully, United States, the average temperature in May hovers around 17°C (63°F), with extremes that can dip to a chilly 1°C (35°F) or soar to a scorching 35°C (95°F). During this month, residents can expect about 163 mm (6.4 in) of precipitation over 15 days, contributing to an average humidity level of 77%. Be prepared for a mix of weather as you enjoy this vibrant location!

May Temperature in Sully

In May in Sully, the average temperature is 17°C (63°F). The maximum can reach 35°C (95°F), while the minimum can be as low as 1°C (35°F). This variation makes it essential for travelers to pack both lightweight clothing for the warm days and warmer layers for the cooler evenings.

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

The chart illustrates May temperature patterns in Sully, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Sully, May typically has an average temperature of 17°C (63°F), with highs reaching up to 35°C (95°F) and lows dropping to around 1°C (35°F).

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

May Precipitation in Sully

In Sully in May, the total precipitation amount is 163 mm (6.4 in) spread over 15 days.

May Precipitation Trends in Sully

The chart displays monthly precipitation patterns in Sully, 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 Sully, May typically receives around 163 mm (6.4 inches) of precipitation spread over approximately 15 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 Sully

In Sully in May, humidity is 77%. With an average temperature of 17°C (63°F), this humidity feels like a cozy blanket wrapped around you, creating a muggy atmosphere that can be a bit uncomfortable for traveling, making you want to seek shade and hydration as you explore.

May Average Humidity in Sully

This chart illustrates the average monthly humidity levels in Sully, 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 Sully is approximately 77%, 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 Sully

In Sully in May, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Sully.

Maximum UV Index Levels in Sully for May

The chart shows the monthly maximum UV Index (UVI) for Sully 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 Sully typically reaches 9, which falls under the very high exposure category.

Data source: Sully 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 Sully Compares to Other Months

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

This table compares monthly weather conditions in Sully, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-5°C (23°F)	44 mm (1.7 inches)	78%	moderate
February Weather	-4°C (24°F)	49 mm (1.9 inches)	80%	moderate
March Weather	4°C (40°F)	83 mm (3.3 inches)	77%	high
April Weather	10°C (50°F)	74 mm (2.9 inches)	77%	very high
May Weather	17°C (63°F)	163 mm (6.4 inches)	77%	very high
June Weather	23°C (74°F)	124 mm (4.9 inches)	81%	extreme
July Weather	25°C (77°F)	72 mm (2.8 inches)	81%	very high
August Weather	23°C (74°F)	65 mm (2.5 inches)	77%	very high
September Weather	20°C (69°F)	121 mm (4.8 inches)	73%	very high
October Weather	12°C (53°F)	137 mm (5.4 inches)	75%	high
November Weather	4°C (39°F)	49 mm (1.9 inches)	85%	moderate
December Weather	0°C (31°F)	40 mm (1.6 inches)	83%	moderate