The highest day temperature in May 2026 was 98°F. The lowest night temperature was 39°F. The average values for day and night temperatures during May were 80.9°F и 55.0°F respectivly.

Most of the days in May are sunny but you can also expect cloudy and gloomy days.

Precipitation total in May for Grand Junction is 0.2 in. This value is relatively stable throughout the year.

The average wind speed in May is 7.3 mph. It makes May one of the most windy months of the year for Grand Junction.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Grand Junction in May is 11.0 hours.