When to go · Waterloo, Iowa
Waterloo, Iowa in May
Great month. Inside Waterloo, Iowa's best window: May–Oct.
Key facts
- Verdict
- Great
- Temperature
- 71°C (160°F)160°F (71°C) / 50°C (122°F)122°F (50°C)
- average high / low
- Rain days
- 4
- Crowds
- Medium
- United States overall
- Prices
- Medium
- United States overall
Verdict
Inside Waterloo, Iowa's best window: May–Oct.
Is another month better than May?
No other month rates higher than May for Waterloo, Iowa in this guide.
Weather in May
- Waterloo, IowaHighs around 71 °C (160 °F), lows around 50 °C (122 °F), rain on about 4 daysHighs around 160 °F (71 °C), lows around 122 °F (50 °C), rain on about 4 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 Waterloo, Iowa, side by side.
Verdict
May: Great
Jun: Great
Daytime high
May: 71 °C (160 °F)160 °F (71 °C)
Jun: 80 °C (176 °F)176 °F (80 °C)
Night low
May: 50 °C (122 °F)122 °F (50 °C)
Jun: 60 °C (140 °F)140 °F (60 °C)
Rain days
May: 4
Jun: 3 (better)
Crowds
May: Medium
Jun: High
Prices
May: Medium
Jun: High
Festivals listed
May: 1
Jun: 0
May: Inside Waterloo, Iowa's best window: May–Oct.
June: Inside Waterloo, Iowa's best window: May–Oct.
Waterloo, Iowa: figures are long-term averages from this guide, not a forecast.
What to pack
- Light, breathable clothes, a sun hat and sunscreen