Idaho Falls (ID) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Idaho Falls.
Climate overview of Idaho Falls
Temperatures in Idaho Falls, Idaho, United States of America, vary greatly throughout the year. July is the hottest month at 31°C (88°F), while January is the coldest at -2°C (28°F).
The city tends toward dry conditions, with around 279 mm (11 in) of rain/snowfall per year. It does, however, have very little rainfall year-round, with very warm summers and very cold winters.
Idaho Falls Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Idaho Falls - and find the best time to visit.
Monthly Temperature in Idaho Falls
The climate in Idaho Falls is known for significant temperature differences throughout the year, making the weather dynamic. Typically, average maximum daytime temperatures range from a very warm 31°C (88°F) in July to a very cold -2°C (28°F) in the coolest month, January.
Nights vary from 11°C (52°F) in July to around -11°C (12°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Idaho Falls
With annual rain/snowfall averaging 279 mm (11 in), Idaho Falls maintains relatively low precipitation levels throughout the seasons. The climate in Idaho Falls shows significant variation throughout the year. Expect moderate rainfall in May, the wettest month, with an average of 34 mm (1.3 in) of precipitation over 10 rainy days.
In contrast, the driest month July offers drier and sunnier days, with around 8.5 mm (0.3 in) of rainfall over 4 rainy days. For more details, please visit our Idaho Falls Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Best Time to Visit Idaho Falls
Each month is rated for comfortable sightseeing weather — mild temperatures and low rainfall. Tap a month for its full averages; your ideal time may differ for a beach or winter trip (see below).
- Best overall: June and September
- Warmest weather: July and August
- Fewest rainy days: July, August and September
- Climate seasons: very little rainfall year-round, with very warm summers and very cold winters
- Best for winter weather: January, with freezing nights around -11°C (12°F).
Frequently asked questions about the climate in Idaho Falls
What is the best time to visit Idaho Falls?
June and September typically offer the most optimal weather in Idaho Falls. In contrast, January, February and December tend to have less optimal conditions. Idaho Falls has very little rainfall year-round, with very warm summers and very cold winters.
What temperatures can I expect in Idaho Falls?
Daytime highs range from -2°C (28°F) in January to 31°C (88°F) in July. Nighttime lows range from -11°C (12°F) to 11°C (52°F). Temperatures vary considerably through the year.
How much rain does Idaho Falls get?
Annual rainfall is around 279 mm (11 in). May is the wettest month with 34 mm (1.3 in), while July is the driest with 8.5 mm (0.3 in).
Idaho Falls 3-Day Forecast
Idaho Falls (ID) 3-Day Forecast
Idaho Falls on the map
Idaho Falls is highlighted - select any city to see its climate.
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