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
- JanuaryAvoidListed as a month to avoid: Nov–Mar (park entrances closed, zoo closed, cold).0 °C (32 °F) / -10 °C (14 °F), 8 rain days32 °F (0 °C) / 14 °F (-10 °C), 8 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Nov–Mar (park entrances closed, zoo closed, cold).3 °C (37 °F) / -8 °C (18 °F), 7 rain days37 °F (3 °C) / 18 °F (-8 °C), 7 rain daysCrowds: Low · 1 festival or holiday
- MarchAvoidListed as a month to avoid: Nov–Mar (park entrances closed, zoo closed, cold).10 °C (50 °F) / -3 °C (27 °F), 8 rain days50 °F (10 °C) / 27 °F (-3 °C), 8 rain daysCrowds: Medium · 2 festivals or holidays
- 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 (59 °F) / 1 °C (34 °F), 8 rain days59 °F (15 °C) / 34 °F (1 °C), 8 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside Idaho Falls's best window: Jun–Sep (warm, parks open); May and Sep for fewer crowds.20 °C (68 °F) / 5 °C (41 °F), 9 rain days68 °F (20 °C) / 41 °F (5 °C), 9 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside Idaho Falls's best window: Jun–Sep (warm, parks open); May and Sep for fewer crowds.26 °C (79 °F) / 9 °C (48 °F), 7 rain days79 °F (26 °C) / 48 °F (9 °C), 7 rain daysCrowds: High
- JulyGreatInside Idaho Falls's best window: Jun–Sep (warm, parks open); May and Sep for fewer crowds.31 °C (88 °F) / 12 °C (54 °F), 5 rain days88 °F (31 °C) / 54 °F (12 °C), 5 rain daysCrowds: High · 1 festival or holiday
- AugustGreatInside Idaho Falls's best window: Jun–Sep (warm, parks open); May and Sep for fewer crowds.30 °C (86 °F) / 11 °C (52 °F), 5 rain days86 °F (30 °C) / 52 °F (11 °C), 5 rain daysCrowds: High
- SeptemberGreatInside Idaho Falls's best window: Jun–Sep (warm, parks open); May and Sep for fewer crowds.25 °C (77 °F) / 7 °C (45 °F), 5 rain days77 °F (25 °C) / 45 °F (7 °C), 5 rain daysCrowds: Medium · 1 festival or holiday
- 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 (61 °F) / 1 °C (34 °F), 6 rain days61 °F (16 °C) / 34 °F (1 °C), 6 rain daysCrowds: Medium
- NovemberAvoidListed as a month to avoid: Nov–Mar (park entrances closed, zoo closed, cold).7 °C (45 °F) / -5 °C (23 °F), 8 rain days45 °F (7 °C) / 23 °F (-5 °C), 8 rain daysCrowds: Medium · 1 festival or holiday
- DecemberAvoidListed as a month to avoid: Nov–Mar (park entrances closed, zoo closed, cold).1 °C (34 °F) / -10 °C (14 °F), 9 rain days34 °F (1 °C) / 14 °F (-10 °C), 9 rain daysCrowds: High · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in Idaho Falls, side by side.
Verdict
May: Great
Jun: Great
Daytime high
May: 20 °C (68 °F)68 °F (20 °C)
Jun: 26 °C (79 °F)79 °F (26 °C)
Night low
May: 5 °C (41 °F)41 °F (5 °C)
Jun: 9 °C (48 °F)48 °F (9 °C)
Rain days
May: 9
Jun: 7 (better)
Crowds
May: Medium
Jun: High
Prices
May: Medium
Jun: High
Festivals listed
May: 1
Jun: 0
May: Inside Idaho Falls's best window: Jun–Sep (warm, parks open); May and Sep for fewer crowds.
June: 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.