When to go · Thermopolis
Thermopolis in May
Great month. Inside Thermopolis's best window: May–Sep.
Key facts
- Verdict
- Great
- Temperature
- 21°C (70°F)70°F (21°C) / 5°C (41°F)41°F (5°C)
- average high / low
- Rain days
- 9
- Crowds
- Medium
- United States overall
- Prices
- Medium
- United States overall
Verdict
Inside Thermopolis's best window: May–Sep.
Is another month better than May?
No other month rates higher than May for Thermopolis in this guide.
Weather in May
- ThermopolisHighs around 21 °C (70 °F), lows around 5 °C (41 °F), rain on about 9 daysHighs around 70 °F (21 °C), lows around 41 °F (5 °C), rain on about 9 days
Festivals and holidays
Dates as our data lists them. Moving holidays (lunar and Islamic calendars, Easter) shift every year: check the date for your year before you build a trip on it.
Memorial Day big impact
Last Monday of May · United States
Start of summer; roads and beaches full.
Crowds and prices
- Crowds · United States overall
- Medium
- Prices · United States overall
- Medium
United States overall: Warm and green; Memorial Day (last Monday) opens the summer season; timed-entry systems start at some parks.
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.
What to pack
- A warm coat, hat and gloves for mornings and evenings