When to go · Idaho Falls
Idaho Falls in August
Great month. Inside Idaho Falls's best window: Jun–Sep (warm, parks open); May and Sep for fewer crowds.
Key facts
- Verdict
- Great
- Temperature
- 30°C (86°F)86°F (30°C) / 11°C (52°F)52°F (11°C)
- average high / low
- Rain days
- 5
- Crowds
- High
- United States overall
- Prices
- High
- United States overall
Verdict
Inside Idaho Falls's best window: Jun–Sep (warm, parks open); May and Sep for fewer crowds.
Is another month better than August?
No other month rates higher than August for Idaho Falls in this guide.
Weather in August
- Idaho FallsHighs around 30 °C (86 °F), lows around 11 °C (52 °F), rain on about 5 daysHighs around 86 °F (30 °C), lows around 52 °F (11 °C), rain on about 5 days
Crowds and prices
- Crowds · United States overall
- High
- Prices · United States overall
- High
United States overall: Hot and busy; wildfire smoke in the West, hurricane peak begins in the Southeast.
High-price month: see what to book ahead.
Compare two months
Weather, crowds and prices for any two months in Idaho Falls, side by side.
Verdict
Aug: Great
May: Great
Daytime high
Aug: 30 °C (86 °F)86 °F (30 °C)
May: 20 °C (68 °F)68 °F (20 °C)
Night low
Aug: 11 °C (52 °F)52 °F (11 °C)
May: 5 °C (41 °F)41 °F (5 °C)
Rain days
Aug: 5 (better)
May: 9
Crowds
Aug: High
May: Medium
Prices
Aug: High
May: Medium
Festivals listed
Aug: 0
May: 1
August: Inside Idaho Falls's best window: Jun–Sep (warm, parks open); May and Sep for fewer crowds.
May: Inside Idaho Falls's best window: Jun–Sep (warm, parks open); May and Sep for fewer crowds.
Idaho Falls: figures are long-term averages from this guide, not a forecast.
What to pack
- Light, breathable clothes, a sun hat and sunscreen
- A warm layer for the evenings