When to go · Ottawa, Illinois
Ottawa, Illinois in August
Avoid month. Listed as a month to avoid: Jan–Feb (ice, closed trails), Jul–Aug (heat and river mosquitoes).
Key facts
- Verdict
- Avoid
- Temperature
- 29°C84°F / 17°C63°F
- average high / low
- Rain days
- 8
- Crowds
- High
- United States overall
- Prices
- High
- United States overall
Verdict
AvoidBest and avoid months for Ottawa, Illinois
Listed as a month to avoid: Jan–Feb (ice, closed trails), Jul–Aug (heat and river mosquitoes).
Weather in August
- Ottawa, IllinoisHighs around 29 °C, lows around 17 °C, rain on about 8 daysHighs around 84 °F, lows around 63 °F, rain on about 8 days
Crowds and prices
- Crowds · United States overall
- High
- Prices · United States overall
- High
United States overall: Hot and busy; wildfire smoke in the West, hurricane peak begins in the Southeast.
High-price month: see what to book ahead.
What to pack
Nothing unusual for the weather this month.