May Weather in Surprise, United States

Last updated: June 24, 2025

In Surprise, United States, the average temperature in May is a warm 26°C (80°F). Expect temperatures to range from a cool 11°C (52°F) to a scorching 42°C (107°F). With an average humidity of 40%, the weather remains comfortable, and you can enjoy minimal rainfall of only 2 mm (0.1 in) throughout the month, across 0 days of precipitation.

May Temperature in Surprise

In May in Surprise, the average temperature is 26°C (80°F), with maximums reaching up to 42°C (107°F) and minimums dropping as low as 11°C (52°F). Travelers should be prepared for a wide range of temperatures, ensuring they pack both light clothing for the heat and warmer layers for cooler evenings.

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

The chart illustrates May temperature patterns in Surprise, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Surprise, May typically has an average temperature of 26°C (80°F), with highs reaching up to 42°C (107°F) and lows dropping to around 11°C (52°F).

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

May Precipitation in Surprise

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

May Precipitation Trends in Surprise

The chart displays monthly precipitation patterns in Surprise, 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 Surprise, 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 Surprise

In Surprise in May, humidity is 40%. With an average temperature of 26°C (80°F), this humidity feels like a comfortable warmth that is refreshing for traveling, allowing for pleasant strolls and outdoor adventures without feeling overly sticky or oppressive.

May Average Humidity in Surprise

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

In Surprise 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 Surprise.

Maximum UV Index Levels in Surprise for May

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

Data source: Surprise 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 Surprise Compares to Other Months

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

This table compares monthly weather conditions in Surprise, 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)	29 mm (1.1 inches)	76%	moderate
February Weather	13°C (56°F)	39 mm (1.5 inches)	79%	high
March Weather	17°C (63°F)	35 mm (1.4 inches)	67%	very high
April Weather	23°C (73°F)	1 mm (0.1 inches)	55%	very high
May Weather	26°C (80°F)	2 mm (0.1 inches)	40%	extreme
June Weather	32°C (91°F)	3 mm (0.1 inches)	33%	extreme
July Weather	34°C (93°F)	41 mm (1.6 inches)	34%	extreme
August Weather	34°C (93°F)	29 mm (1.2 inches)	48%	extreme
September Weather	30°C (87°F)	21 mm (0.8 inches)	64%	very high
October Weather	23°C (74°F)	22 mm (0.9 inches)	67%	high
November Weather	18°C (65°F)	26 mm (1.0 inches)	77%	moderate
December Weather	12°C (54°F)	23 mm (0.9 inches)	82%	moderate