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Best Time to Visit Ottawa
Real month-by-month weather for Ottawa, and real flight prices from London — so "best time" here means something you can check, not a generic guess. July runs warmest (27°C avg high).
Ottawa by month: weather & fares
Weather is averaged from 3 years of real historical data. Fares are the real cheapest on file from London that month.
| Month | Avg high / low | Avg rainfall | Cheapest fare |
|---|---|---|---|
| January | -3° / -10°C | ~78mm | — |
| February | -1° / -11°C | ~60mm | — |
| March | 5° / -5°C | ~80mm | — |
| April | 13° / 1°C | ~108mm | — |
| May | 20° / 8°C | ~94mm | — |
| June | 25° / 14°C | ~104mm | — |
| July | 27° / 18°C | ~147mm | — |
| August | 25° / 16°C | ~111mm | — |
| September | 23° / 13°C | ~40mm | — |
| October | 16° / 7°C | ~72mm | — |
| November | 6° / -1°C | ~66mm | — |
| December | -1° / -8°C | ~88mm | — |
Nearby airports
- Ottawa / Rockcliffe Airport (YRO)15 km
- Ottawa / Gatineau Airport (YND)24 km
- Ogdensburg International Airport (OGS)73 km
- Massena International Richards Field (MSS)78 km
Planning tips for Ottawa
- Compare the weather and fare columns above together — the cheapest month isn't always the best-weather month.
- Shoulder-season travel (just before or after the busiest months) often balances good weather against lower prices.
- Book 4-8 weeks ahead where possible — a general pattern, not a guarantee for this specific destination.
- Check nearby airports above if Ottawa has real alternatives — a short extra journey can mean a much lower fare.
- Factor in local public holidays and school terms at your destination, not just at home — prices and crowds follow both.
- Re-check rainfall, not just temperature — a warm month can still be a very wet one.
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FAQs — Best time to visit Ottawa
July has the highest average temperatures, based on 3 years of real historical weather data.