Current Weather and Forecast in Idaho Falls, ID
Idaho, United States 🇺🇸
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About the weather in Idaho Falls
Idaho Falls has a semi-arid climate. July is the warmest month, with average highs of 90°, and January the coldest, when nights fall to around 15°. May brings the most rain, on about 10 days, while July is the sunniest, with 14.2 hours of sunshine a day. Over a whole year it rains on roughly 84 days.
Idaho Falls climate guide: monthly averages, seasons and the best time to visit
Common questions
When does it rain most in Idaho Falls?
May, at 1.9 inches (48 mm) over about 10 days. July is the driest month, at 5 mm (0.2 in).
What is the coldest month in Idaho Falls?
January, with highs of 31°F (-1°C) and lows near 15°F (-9°C). The coldest day in the 2015-2024 record fell to -21°F (-29°C).
What is the best time to visit Idaho Falls?
The best time to visit Idaho Falls is generally May to June and September to October, when temperatures sit either side of the peak heat rather than in it. Daytime temperatures in that window sit near 71°F (21°C), with rain on about 7 days a month. For the same question asked the other way round, see where else is warm in May.
Is Idaho Falls hot in summer?
July averages 90°F (32°C). Hot afternoons happen but extremes are not the norm.
What is the average temperature in Idaho Falls?
47°F (8°C) across all twelve months - about 59°F (15°C) by day and 36°F (2°C) after dark.
Is Idaho Falls humid?
Relative humidity averages 54% across the year, which reads as dry. The most comfortable stretch falls in the drier half of the year.
Which month is warmest in Idaho Falls?
July, averaging 90°F (32°C) by day and 60°F (16°C) overnight. The hottest single day in our 2015-2024 record for this location reached 103°F (39°C).
Is there snow in Idaho Falls?
Yes - about 30 days a year carry measurable snowfall, concentrated October through April.