May Weather in Tempe, United States

Last updated: June 24, 2025

In May, the average temperature in Tempe, United States hovers around 28°C (82°F). Expect a minimum drop to 13°C (55°F) and a maximum rise to a sizzling 43°C (109°F). During this month, precipitation is quite minimal, with only 2 mm (0.1 in) expected over 0 days. The average humidity sits at a comfortable 40%, making it a pleasant time to explore!

May Temperature in Tempe

In May in Tempe, the average temperature is 28°C (82°F). Maximums can reach 43°C (109°F), while minimums can dip as low as 13°C (55°F). Travelers should be prepared for both heat and cooler evenings during this time.

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

The chart illustrates May temperature patterns in Tempe, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Tempe, May typically has an average temperature of 28°C (82°F), with highs reaching up to 43°C (109°F) and lows dropping to around 13°C (55°F).

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

May Precipitation in Tempe

In Tempe in May, the precipitation amount is 2 mm (0.1 in) during a span of 0 days.

May Precipitation Trends in Tempe

The chart displays monthly precipitation patterns in Tempe, 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 Tempe, May typically receives around 2 mm (0.1 inches) of precipitation spread over approximately 0 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 Tempe

In Tempe in May humidity is 40%. With an average temperature of 28°C (82°F), this humidity feels like a pleasant, warm embrace, making it ideal for comfortable outdoor activities and exploration, though you may want to stay hydrated as you travel.

May Average Humidity in Tempe

This chart illustrates the average monthly humidity levels in Tempe, 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 Tempe is approximately 40%, 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 Tempe

In Tempe 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 Tempe.

Maximum UV Index Levels in Tempe for May

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

Data source: Tempe 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 Tempe Compares to Other Months

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

This table compares monthly weather conditions in Tempe, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
	Temperature	Precipitation	Humidity	UV
January Weather	12°C (54°F)	25 mm (1.0 inches)	76%	moderate
February Weather	14°C (57°F)	37 mm (1.4 inches)	79%	high
March Weather	18°C (65°F)	29 mm (1.2 inches)	67%	very high
April Weather	24°C (75°F)	1 mm (0.1 inches)	55%	very high
May Weather	28°C (82°F)	2 mm (0.1 inches)	40%	extreme
June Weather	34°C (93°F)	2 mm (0.1 inches)	33%	extreme
July Weather	35°C (95°F)	37 mm (1.4 inches)	34%	extreme
August Weather	35°C (95°F)	39 mm (1.5 inches)	48%	extreme
September Weather	32°C (89°F)	27 mm (1.1 inches)	64%	very high
October Weather	24°C (76°F)	26 mm (1.0 inches)	67%	high
November Weather	18°C (66°F)	21 mm (0.8 inches)	77%	moderate
December Weather	13°C (55°F)	23 mm (0.9 inches)	82%	moderate