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May Weather in Casa Grande, United States

Last updated: June 24, 2025

In Casa Grande, United States, the average temperature in May is a warm 27°C (81°F), with extremes ranging from a cool 12°C (54°F) to a scorching 43°C (109°F). During this month, you can expect minimal precipitation, with just 1 mm (0.1 in) over 0 days. The average humidity sits comfortably at 40%, making it a pleasant time to explore the area.

May Temperature in Casa Grande

In May in Casa Grande, the average temperature is 27°C (81°F). Maximums can reach 43°C (109°F), and minimums can be as low as 12°C (54°F). Travelers should be prepared for hot days and cooler nights, making it essential to pack accordingly for their adventure.

May Weather in Casa Grande: Daily Temperature Highs, Lows, and Averages

The chart illustrates May temperature patterns in Casa Grande, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Casa Grande, May typically has an average temperature of 27°C (81°F), with highs reaching up to 43°C (109°F) and lows dropping to around 12°C (54°F).
JanFebMarAprMayJunJulAugSepOctNovDec545765748191949388766555
Data source: Temperature data for Casa Grande generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

May Precipitation in Casa Grande

In Casa Grande in May, the precipitation amount is 1 mm (0.1 in) during 0 days, indicating a very dry period.

May Precipitation Trends in Casa Grande

The chart displays monthly precipitation patterns in Casa Grande, 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 Casa Grande, May typically receives around 1 mm (0.1 inches) of precipitation spread over approximately 0 days.
JanFebMarAprMayJunJulAugSepOctNovDec202919225383621151324
Data source: Precipitation data for May generated using information from the Copernicus Climate Change Service.
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May Humidity in Casa Grande

In Casa Grande in May humidity is 40%. With an average temperature of 27°C (81°F), this humidity feels like a pleasant breeze, making it comfortable for exploring the outdoors and enjoying various activities without feeling overly sticky or drenched in sweat.

May Average Humidity in Casa Grande

This chart illustrates the average monthly humidity levels in Casa Grande, 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 Casa Grande is approximately 40%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec76%79%67%55%40%33%34%48%64%67%77%82%
Data source: Humidity data for May generated using information from the Copernicus Climate Change Service.

May UV Index in Casa Grande

In Casa Grande 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 Casa Grande.

Maximum UV Index Levels in Casa Grande for May

The chart shows the monthly maximum UV Index (UVI) for Casa Grande 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 Casa Grande typically reaches 11, which falls under the extreme exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec469111112111110854
Data source: Casa Grande 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 Casa Grande Compares to Other Months

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

This table compares monthly weather conditions in Casa Grande, showing how May’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather12°C (55°F)20 mm (0.8 inches)76%moderate
February Weather14°C (58°F)29 mm (1.1 inches)79%high
March Weather18°C (65°F)19 mm (0.7 inches)67%very high
April Weather24°C (75°F)1 mm (0.1 inches)55%extreme
May Weather27°C (81°F)1 mm (0.1 inches)40%extreme
June Weather33°C (92°F)5 mm (0.2 inches)33%extreme
July Weather34°C (94°F)38 mm (1.5 inches)34%extreme
August Weather34°C (94°F)36 mm (1.4 inches)48%extreme
September Weather31°C (88°F)21 mm (0.8 inches)64%very high
October Weather24°C (76°F)15 mm (0.6 inches)67%very high
November Weather19°C (66°F)13 mm (0.5 inches)77%moderate
December Weather13°C (55°F)24 mm (0.9 inches)82%moderate

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