When to go · Thermopolis
Thermopolis, month by month
The best months for Thermopolis: May, Jun, Jul, Aug, Sep. Months to avoid: Jan, Feb, Dec.
Month by month
- JanuaryAvoidListed as a month to avoid: Dec–Feb (cold, some sites key-access only).0 °C (32 °F) / -13 °C (9 °F), 5 rain days32 °F (0 °C) / 9 °F (-13 °C), 5 rain daysCrowds: Low
- FebruaryAvoidListed as a month to avoid: Dec–Feb (cold, some sites key-access only).3 °C (37 °F) / -11 °C (12 °F), 5 rain days37 °F (3 °C) / 12 °F (-11 °C), 5 rain daysCrowds: Low · 1 festival or holiday
- MarchGoodOutside the best window (May–Sep). Across United States: Spring break fills Florida beaches and parks; the desert parks come into season.10 °C (50 °F) / -5 °C (23 °F), 6 rain days50 °F (10 °C) / 23 °F (-5 °C), 6 rain daysCrowds: Medium · 2 festivals or holidays
- AprilGoodOutside the best window (May–Sep). Across United States: Good month for the Southwest, Washington cherry blossoms, the South; mountain roads still closed.15 °C (59 °F) / 0 °C (32 °F), 7 rain days59 °F (15 °C) / 32 °F (0 °C), 7 rain daysCrowds: Medium · 1 festival or holiday
- MayGreatInside Thermopolis's best window: May–Sep.21 °C (70 °F) / 5 °C (41 °F), 9 rain days70 °F (21 °C) / 41 °F (5 °C), 9 rain daysCrowds: Medium · 1 festival or holiday
- JuneGreatInside Thermopolis's best window: May–Sep.27 °C (81 °F) / 10 °C (50 °F), 8 rain days81 °F (27 °C) / 50 °F (10 °C), 8 rain daysCrowds: High
- JulyGreatInside Thermopolis's best window: May–Sep.32 °C (90 °F) / 14 °C (57 °F), 6 rain days90 °F (32 °C) / 57 °F (14 °C), 6 rain daysCrowds: High · 1 festival or holiday
- AugustGreatInside Thermopolis's best window: May–Sep.31 °C (88 °F) / 13 °C (55 °F), 6 rain days88 °F (31 °C) / 55 °F (13 °C), 6 rain daysCrowds: High
- SeptemberGreatInside Thermopolis's best window: May–Sep.24 °C (75 °F) / 7 °C (45 °F), 6 rain days75 °F (24 °C) / 45 °F (7 °C), 6 rain daysCrowds: Medium · 1 festival or holiday
- OctoberGoodOutside the best window (May–Sep). 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), 5 rain days61 °F (16 °C) / 34 °F (1 °C), 5 rain daysCrowds: Medium
- NovemberMixedOutside the best window (May–Sep). Across United States: Quiet between holidays; Thanksgiving week is the busiest travel period of the year.7 °C (45 °F) / -6 °C (21 °F), 5 rain days45 °F (7 °C) / 21 °F (-6 °C), 5 rain daysCrowds: Medium · 1 festival or holiday
- DecemberAvoidListed as a month to avoid: Dec–Feb (cold, some sites key-access only).0 °C (32 °F) / -12 °C (10 °F), 5 rain days32 °F (0 °C) / 10 °F (-12 °C), 5 rain daysCrowds: High · 1 festival or holiday
Compare two months
Weather, crowds and prices for any two months in Thermopolis, side by side.
Verdict
May: Great
Jun: Great
Daytime high
May: 21 °C (70 °F)70 °F (21 °C)
Jun: 27 °C (81 °F)81 °F (27 °C)
Night low
May: 5 °C (41 °F)41 °F (5 °C)
Jun: 10 °C (50 °F)50 °F (10 °C)
Rain days
May: 9
Jun: 8 (better)
Crowds
May: Medium
Jun: High
Prices
May: Medium
Jun: High
Festivals listed
May: 1
Jun: 0
May: Inside Thermopolis's best window: May–Sep.
June: Inside Thermopolis's best window: May–Sep.
Thermopolis: figures are long-term averages from this guide, not a forecast.