Grand Canyon Weather in May

What's the weather like in Grand Canyon (Arizona) in May 2025?

The climate in Grand Canyon during May can be summarized as mild and dry.

May is in the spring in Grand Canyon and is typically the 5th warmest month of the year. Daytime maximum temperatures average around 25°C (77°F), whilst at night 6°C (43°F) is normal.

Grand Canyon weather averages (imperial / metric)
Daytime temperature	24.8°C 76.6°F
Nightly temperature	6°C 42.8°F
Average temperature	15.4°C 59.7°F
Daily sunshine	12.4 hrs
Avg rainfall	23 mm 0.9 ins
Rainy days	4 days
Sea temperature	14.2°C 57.5°F
Humidity	33%
Windspeed	17.6kph 11 mph

On average May is the 4th driest month of the year in Grand Canyon with around 23mm 0.9 inches of rain making it a dry time to visit. This rainfall is typically spread over 4 days, although this may vary considerably.

On the flip side this corresponds to an average of 12.4 hours of sunshine per day.

May temperatures in Grand Canyon

May rainfall

May hourly sunshine

The data used in these monthly averages covers a period of over 100 years right up until last year. As such they are a valid prediction of what to expect for the weather in Grand Canyon in May 2024.