Grand Junction Weather in May

What's the weather like in Grand Junction (Colorado) in May 2025?

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

May is in the spring in Grand Junction and is typically the 5th warmest month of the year. Daytime maximum temperatures average around a comfortable 24°C (76°F), whilst at night 8°C (46°F) is normal.

Grand Junction weather averages (imperial / metric)
Daytime temperature 24.4°C 75.9°F
Nightly temperature 7.8°C 46°F
Average temperature 16.1°C 61°F
Daily sunshine 11.2 hrs
Avg rainfall 22 mm 0.9 ins
Rainy days 6 days
Sea temperature 13°C 55.3°F
Humidity 37%
Windspeed 16.2kph 10 mph

On average May is the 4th wettest month of the year in Grand Junction with around 22mm 0.9 inches of rain making it a dry time to visit. This rainfall is typically spread over 6 days, although this may vary considerably.

On the flip side this corresponds to an average of 11.2 hours of sunshine per day.

May temperatures in Grand Junction

Grand Junction average temperature in May

May rainfall

Grand Junction average rain in May

May hourly sunshine

Grand Junction average rain in May

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 Junction in May 2025.

Other monthly averages

Best places to visit in May

UV index Best time to go?

Beta

Current (hourly) weather 15 day forecast

Grand Junction weather stats

Grand Junction weather statistics
Hottest month: July 33.6°C 92.5°F
Driest month: June 12mm 0.5ins
Sunniest month: June 12.6hrs
Coldest month: January 1.9°C 35.4°F
Wettest month: October 25mm 1ins
Map showing location of Grand Junction (39.06387, -108.55065) Grand Junction map pin © Google

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