The highest day temperature in May 2025 was 86°F. The lowest night temperature was 31°F. The average values for day and night temperatures during May were 67.3°F и 39.8°F respectivly.

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

Precipitation total in May for Idaho Falls is 0.8 in. It makes may one of the most rainy months of the year.

The average wind speed in May is 8.8 mph. It makes May one of the most windy months of the year for Idaho Falls.

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 Idaho Falls in May is 9.4 hours.