May Weather in Opal, United States

Last updated: June 24, 2025

In May, the average temperature in Opal, United States hovers around 19°C (67°F). Expect lows of 2°C (36°F) and highs reaching up to 35°C (95°F). During this month, you can anticipate approximately 116 mm (4.5 in) of precipitation spread over 12 days, contributing to an average humidity of 78%.

May Temperature in Opal

In May in Opal, the average temperature is 19°C (67°F). The maximum can reach 35°C (95°F), while the minimum can drop as low as 2°C (36°F). It's advisable to pack for a range of temperatures when traveling to Opal during this month.

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

The chart illustrates May temperature patterns in Opal, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Opal, May typically has an average temperature of 19°C (67°F), with highs reaching up to 35°C (95°F) and lows dropping to around 2°C (36°F).

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

May Precipitation in Opal

In Opal in May, the precipitation amount is 116 mm (4.5 in) over the course of 12 days.

May Precipitation Trends in Opal

The chart displays monthly precipitation patterns in Opal, 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 Opal, May typically receives around 116 mm (4.5 inches) of precipitation spread over approximately 12 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 Opal

In Opal in May humidity is 78%. With an average temperature of 19°C (67°F), this humidity feels like a warm, heavy blanket enveloping you, making traveling feel both sticky and sluggish as you navigate through the day.

May Average Humidity in Opal

This chart illustrates the average monthly humidity levels in Opal, 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 Opal 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 Opal

In Opal 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 Opal.

Maximum UV Index Levels in Opal for May

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

Data source: Opal 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 Opal Compares to Other Months

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

This table compares monthly weather conditions in Opal, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	3°C (38°F)	60 mm (2.3 inches)	86%	moderate
February Weather	6°C (42°F)	90 mm (3.5 inches)	86%	moderate
March Weather	9°C (48°F)	74 mm (2.9 inches)	86%	high
April Weather	14°C (58°F)	103 mm (4.1 inches)	84%	very high
May Weather	19°C (67°F)	116 mm (4.5 inches)	78%	very high
June Weather	24°C (76°F)	106 mm (4.2 inches)	79%	very high
July Weather	27°C (81°F)	85 mm (3.3 inches)	70%	very high
August Weather	25°C (78°F)	132 mm (5.2 inches)	59%	very high
September Weather	22°C (72°F)	90 mm (3.5 inches)	68%	very high
October Weather	17°C (63°F)	106 mm (4.2 inches)	80%	high
November Weather	9°C (48°F)	80 mm (3.2 inches)	86%	moderate
December Weather	5°C (42°F)	85 mm (3.3 inches)	85%	moderate