May Weather in Port Byron, United States

Last updated: June 24, 2025

In Port Byron, United States, the average temperature in May settles at a pleasant 17°C (63°F). However, temperatures can swing from a chilly -1°C (31°F) to a warm 35°C (95°F). Expect a notable 149 mm (5.9 in) of precipitation spread over 15 days, contributing to an average humidity of 78%. Enjoy the variety that this month brings!

May Temperature in Port Byron

In May in Port Byron, the average temperature is 17°C (63°F). Maximum temperatures can reach 35°C (95°F) and minimums can drop to as low as -1°C (31°F). Be prepared for a wide range of weather conditions if you're planning to travel during this time.

May Weather in Port Byron: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Port Byron, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Port Byron, 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 (31°F).

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

May Precipitation in Port Byron

In Port Byron in May, the precipitation amount is 149 mm (5.9 in) over a period of 15 days.

May Precipitation Trends in Port Byron

The chart displays monthly precipitation patterns in Port Byron, 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 Port Byron, May typically receives around 149 mm (5.9 inches) of precipitation spread over approximately 15 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 Port Byron

In Port Byron in May, humidity is 78%. With an average temperature of 17°C (63°F), this humidity feels like a warm, enveloping blanket, making traveling slightly uncomfortable as you navigate the sticky air, prompting the need for frequent breaks in cooler, shaded areas.

May Average Humidity in Port Byron

This chart illustrates the average monthly humidity levels in Port Byron, 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 Port Byron is approximately 78%, 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 Port Byron

In Port Byron 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 Port Byron.

Maximum UV Index Levels in Port Byron for May

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

Data source: Port Byron 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 Port Byron Compares to Other Months

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

This table compares monthly weather conditions in Port Byron, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	-4°C (24°F)	55 mm (2.2 inches)	81%	moderate
February Weather	-3°C (27°F)	59 mm (2.3 inches)	81%	moderate
March Weather	5°C (40°F)	93 mm (3.6 inches)	81%	high
April Weather	10°C (50°F)	109 mm (4.3 inches)	82%	very high
May Weather	17°C (63°F)	149 mm (5.9 inches)	78%	very high
June Weather	23°C (74°F)	137 mm (5.4 inches)	81%	extreme
July Weather	25°C (77°F)	88 mm (3.5 inches)	79%	very high
August Weather	23°C (74°F)	73 mm (2.9 inches)	77%	very high
September Weather	20°C (69°F)	107 mm (4.2 inches)	78%	very high
October Weather	12°C (55°F)	120 mm (4.7 inches)	78%	high
November Weather	4°C (39°F)	50 mm (2.0 inches)	87%	moderate
December Weather	0°C (33°F)	49 mm (1.9 inches)	84%	low