May Weather in Iona, United States

Last updated: June 24, 2025

In Iona, United States, the average temperature in May hovers around 12°C (54°F). Be prepared for a wide range of temperatures, with a minimum plummeting to -4°C (25°F) and a maximum soaring to 31°C (88°F). Expect about 58 mm (2.3 in) of precipitation spread over 11 days, and a comfortable average humidity of 71%.

May Temperature in Iona

In May in Iona, the average temperature is 12°C (54°F). The maximum can reach 31°C (88°F) and the minimum can be as low as -4°C (25°F). Be prepared for a wide range of temperatures, making it essential to pack layered clothing for your travels.

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

The chart illustrates May temperature patterns in Iona, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Iona, May typically has an average temperature of 12°C (54°F), with highs reaching up to 31°C (88°F) and lows dropping to around -4°C (25°F).

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

May Precipitation in Iona

In Iona in May, the precipitation amount is 58 mm (2.3 in) over the course of 11 days.

May Precipitation Trends in Iona

The chart displays monthly precipitation patterns in Iona, 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 Iona, May typically receives around 58 mm (2.3 inches) of precipitation spread over approximately 11 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 Iona

In Iona in May humidity is 71%. With an average temperature of 12°C (54°F), this humidity feels like a damp chill that clings to your skin, making it essential to dress in layers while exploring the area, as the cool air can be refreshing yet slightly uncomfortable without proper attire for outdoor activities.

May Average Humidity in Iona

This chart illustrates the average monthly humidity levels in Iona, 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 Iona is approximately 71%, 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 Iona

In Iona 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 Iona.

Maximum UV Index Levels in Iona for May

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

Data source: Iona 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 Iona Compares to Other Months

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

This table compares monthly weather conditions in Iona, 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 (24°F)	40 mm (1.6 inches)	95%	moderate
February Weather	-3°C (27°F)	48 mm (1.9 inches)	95%	moderate
March Weather	3°C (37°F)	43 mm (1.7 inches)	90%	high
April Weather	7°C (45°F)	55 mm (2.2 inches)	81%	very high
May Weather	12°C (54°F)	58 mm (2.3 inches)	71%	very high
June Weather	18°C (65°F)	31 mm (1.2 inches)	64%	extreme
July Weather	23°C (74°F)	11 mm (0.4 inches)	59%	extreme
August Weather	21°C (71°F)	16 mm (0.6 inches)	49%	very high
September Weather	16°C (61°F)	26 mm (1.0 inches)	52%	very high
October Weather	7°C (45°F)	39 mm (1.5 inches)	69%	high
November Weather	2°C (36°F)	32 mm (1.3 inches)	86%	moderate
December Weather	-4°C (26°F)	41 mm (1.6 inches)	91%	moderate