May Weather in Allen, United States

Last updated: June 24, 2025

In May, the average temperature in Allen, United States hovers around 23°C (74°F). However, temperatures can vary significantly, dipping to a minimum of 8°C (46°F) and soaring to a maximum of 35°C (96°F). Expect about 177 mm (7.0 in) of precipitation over 12 days, contributing to an average humidity of 81%. Stay prepared for a mix of warmth and moisture!

May Temperature in Allen

In May, in Allen, the average temperature is 23°C (74°F). Maximums can reach 35°C (96°F) while minimums can drop to as low as 8°C (46°F). This weather makes Allen an ideal destination for travelers, offering a pleasant climate for outdoor activities and exploration.

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

The chart illustrates May temperature patterns in Allen, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Allen, May typically has an average temperature of 23°C (74°F), with highs reaching up to 35°C (96°F) and lows dropping to around 8°C (46°F).

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

May Precipitation in Allen

In Allen in May, the total precipitation amount is 177 mm (7.0 in) spread out over 12 days.

May Precipitation Trends in Allen

The chart displays monthly precipitation patterns in Allen, 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 Allen, May typically receives around 177 mm (7.0 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 Allen

In Allen in May, humidity is 81%. With an average temperature of 23°C (74°F), this humidity feels like a warm, heavy blanket draped over your skin, making travel feel a bit more sluggish and requiring plenty of water breaks to stay comfortable.

May Average Humidity in Allen

This chart illustrates the average monthly humidity levels in Allen, 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 Allen is approximately 81%, 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 Allen

In Allen in May, the maximum UV index reaches 11, which corresponds to an extreme Exposure Category. With a time to burn of just 10 minutes, it's essential to take precautions. For more details, you can check the Hourly UV Index in Allen.

Maximum UV Index Levels in Allen for May

The chart shows the monthly maximum UV Index (UVI) for Allen 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 Allen typically reaches 11, which falls under the extreme exposure category.

Data source: Allen 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 Allen Compares to Other Months

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

This table compares monthly weather conditions in Allen, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	8°C (47°F)	59 mm (2.3 inches)	80%	moderate
February Weather	9°C (49°F)	102 mm (4.0 inches)	79%	high
March Weather	15°C (60°F)	120 mm (4.7 inches)	78%	very high
April Weather	18°C (65°F)	121 mm (4.8 inches)	78%	very high
May Weather	23°C (74°F)	177 mm (7.0 inches)	81%	extreme
June Weather	27°C (81°F)	86 mm (3.4 inches)	78%	extreme
July Weather	29°C (85°F)	50 mm (2.0 inches)	73%	extreme
August Weather	29°C (85°F)	98 mm (3.9 inches)	66%	extreme
September Weather	26°C (79°F)	92 mm (3.6 inches)	65%	very high
October Weather	20°C (68°F)	146 mm (5.8 inches)	72%	very high
November Weather	13°C (56°F)	58 mm (2.3 inches)	82%	high
December Weather	11°C (51°F)	67 mm (2.6 inches)	87%	moderate