May Weather in Plano, United States

Last updated: June 24, 2025

In May, the average temperature in Plano, United States hovers around 16°C (61°F), with a range that can dip to a chilly -1°C (30°F) or soar to a warm 33°C (92°F). This month sees a substantial precipitation amount of 157 mm (6.2 in) over approximately 16 days, contributing to the area's high average humidity of 79%.

May Temperature in Plano

In May in Plano, the average temperature is 16°C (61°F). Maximum temperatures can reach 33°C (92°F), while the minimum can drop as low as -1°C (30°F). Travelers should be prepared for a wide range of temperatures, so packing layered clothing is advisable.

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

The chart illustrates May temperature patterns in Plano, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Plano, May typically has an average temperature of 16°C (61°F), with highs reaching up to 33°C (92°F) and lows dropping to around -1°C (30°F).

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

May Precipitation in Plano

In Plano in May, the total precipitation amount is 157 mm (6.2 in) spread over 16 days.

May Precipitation Trends in Plano

The chart displays monthly precipitation patterns in Plano, 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 Plano, May typically receives around 157 mm (6.2 inches) of precipitation spread over approximately 16 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 Plano

In Plano in May humidity is 79%. With an average temperature of 16°C (61°F), this humidity feels like a warm, moist embrace, making travel a bit more challenging as the air tends to weigh heavily, but it also offers a refreshing atmosphere perfect for exploring local sights and enjoying nature.

May Average Humidity in Plano

This chart illustrates the average monthly humidity levels in Plano, 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 Plano is approximately 79%, 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 Plano

In Plano 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 Plano.

Maximum UV Index Levels in Plano for May

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

Data source: Plano 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 Plano Compares to Other Months

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

This table compares monthly weather conditions in Plano, 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 (25°F)	63 mm (2.5 inches)	82%	moderate
February Weather	-3°C (27°F)	61 mm (2.4 inches)	83%	moderate
March Weather	4°C (40°F)	86 mm (3.4 inches)	84%	high
April Weather	9°C (49°F)	117 mm (4.6 inches)	85%	very high
May Weather	16°C (61°F)	157 mm (6.2 inches)	79%	very high
June Weather	22°C (72°F)	139 mm (5.5 inches)	82%	very high
July Weather	24°C (75°F)	112 mm (4.4 inches)	80%	very high
August Weather	22°C (73°F)	81 mm (3.2 inches)	81%	very high
September Weather	20°C (68°F)	102 mm (4.0 inches)	80%	very high
October Weather	12°C (54°F)	128 mm (5.1 inches)	82%	high
November Weather	4°C (39°F)	56 mm (2.2 inches)	88%	moderate
December Weather	0°C (33°F)	52 mm (2.0 inches)	84%	low