May Weather in Plano, United States

Last updated: June 24, 2025

In Plano, United States, the average temperature in May hovers around 21°C (70°F), with a minimum dipping to 2°C (36°F) and a maximum soaring to 34°C (94°F). Prepare for 121 mm (4.8 in) of precipitation spread across 13 days, contributing to an average humidity of 82%. Stay hydrated and embrace the elements!

May Temperature in Plano

In May in Plano, the average temperature is 21°C (70°F), with maximums reaching 34°C (94°F) and minimums dropping to 2°C (36°F). This diverse temperature range makes Plano an ideal destination for travelers seeking a mix of warm days and cooler evenings.

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 21°C (70°F), with highs reaching up to 34°C (94°F) and lows dropping to around 2°C (36°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 121 mm (4.8 in) over the course of 13 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 121 mm (4.8 inches) of precipitation spread over approximately 13 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 82%. With an average temperature of 21°C (70°F), this humidity feels like a warm, sticky embrace that can quickly lead to discomfort for travelers, making outdoor activities less enjoyable and requiring frequent breaks for hydration.

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 82%, 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 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 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 10, 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 (39°F)	97 mm (3.8 inches)	87%	moderate
February Weather	6°C (43°F)	178 mm (7.0 inches)	86%	high
March Weather	10°C (51°F)	139 mm (5.5 inches)	86%	high
April Weather	14°C (58°F)	159 mm (6.3 inches)	82%	very high
May Weather	21°C (70°F)	121 mm (4.8 inches)	82%	very high
June Weather	25°C (76°F)	153 mm (6.0 inches)	83%	extreme
July Weather	27°C (80°F)	121 mm (4.8 inches)	80%	extreme
August Weather	25°C (78°F)	135 mm (5.3 inches)	74%	very high
September Weather	23°C (73°F)	132 mm (5.2 inches)	71%	very high
October Weather	17°C (62°F)	126 mm (5.0 inches)	78%	high
November Weather	8°C (47°F)	87 mm (3.4 inches)	88%	moderate
December Weather	6°C (44°F)	132 mm (5.2 inches)	88%	moderate