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When to go · Idaho Falls

Idaho Falls, month by month

The best months for Idaho Falls: May, Jun, Jul, Aug, Sep. Months to avoid: Jan, Feb, Mar, Nov, Dec.

Month by month

  1. JanuaryAvoidListed as a month to avoid: Nov–Mar (park entrances closed, zoo closed, cold).0 °C / -10 °C, 8 rain daysCrowds: Low
  2. FebruaryAvoidListed as a month to avoid: Nov–Mar (park entrances closed, zoo closed, cold).3 °C / -8 °C, 7 rain daysCrowds: Low · 1 festival or holiday
  3. MarchAvoidListed as a month to avoid: Nov–Mar (park entrances closed, zoo closed, cold).10 °C / -3 °C, 8 rain daysCrowds: Medium · 2 festivals or holidays
  4. AprilGoodOutside the best window (Jun–Sep (warm, parks open); May and Sep for fewer crowds). Across United States: Good month for the Southwest, Washington cherry blossoms, the South; mountain roads still closed.15 °C / 1 °C, 8 rain daysCrowds: Medium · 1 festival or holiday
  5. MayGreatInside Idaho Falls's best window: Jun–Sep (warm, parks open); May and Sep for fewer crowds.20 °C / 5 °C, 9 rain daysCrowds: Medium · 1 festival or holiday
  6. JuneGreatInside Idaho Falls's best window: Jun–Sep (warm, parks open); May and Sep for fewer crowds.26 °C / 9 °C, 7 rain daysCrowds: High
  7. JulyGreatInside Idaho Falls's best window: Jun–Sep (warm, parks open); May and Sep for fewer crowds.31 °C / 12 °C, 5 rain daysCrowds: High · 1 festival or holiday
  8. AugustGreatInside Idaho Falls's best window: Jun–Sep (warm, parks open); May and Sep for fewer crowds.30 °C / 11 °C, 5 rain daysCrowds: High
  9. SeptemberGreatInside Idaho Falls's best window: Jun–Sep (warm, parks open); May and Sep for fewer crowds.25 °C / 7 °C, 5 rain daysCrowds: Medium · 1 festival or holiday
  10. OctoberGoodOutside the best window (Jun–Sep (warm, parks open); May and Sep for fewer crowds). Across United States: Best all-round month: New England foliage, desert parks, cooler cities. High roads start closing late in the month.16 °C / 1 °C, 6 rain daysCrowds: Medium
  11. NovemberAvoidListed as a month to avoid: Nov–Mar (park entrances closed, zoo closed, cold).7 °C / -5 °C, 8 rain daysCrowds: Medium · 1 festival or holiday
  12. DecemberAvoidListed as a month to avoid: Nov–Mar (park entrances closed, zoo closed, cold).1 °C / -10 °C, 9 rain daysCrowds: High · 1 festival or holiday