Ottawa climate
Canada
In Ottawa, seasonality tends to show up in mornings/evenings and indoor-outdoor gaps more than in a single number.
Ottawa climate can look simple on averages, but travel comfort is often driven by humidity, wind, and rain.
Climate facts
Dec · Jan · Feb
Avg low -14 to -10°C / high -6 to -2°C · Precip days: 10–15 / ~45–80 mm
Mar · Apr · May
Avg low -6 to 10°C / high 2 to 21°C · Rainy days: 8–12 / ~50–90 mm
Jun · Jul · Aug
Avg low 16–19°C / high 24–28°C · Rainy days: 7–11 / ~70–110 mm
Sep · Oct · Nov
Avg low -5 to 12°C / high 4 to 22°C · Rainy days: 7–11 / ~55–95 mm
How it tends to feel for travel
Rainier seasons can feel heavier even at similar temperatures, simply because you spend more time damp or under clouds.
When it tends to fit
- • Once you see the year-round pattern, it’s easier to judge whether a month fits your style.
- • If you revisit the city, separating “seasonal itineraries” can save a lot of planning time.
When it may not fit
- • If you rely only on averages, you may be surprised by variability (squalls, wind, indoor AC).
- • In monsoon-like periods, the more your itinerary depends on outdoor walking, the higher the risk.
Outfit notes
This connects climate patterns to packing—without over-interpreting.
- • 🧩 Key idea: Ottawa has strong seasonal contrast. Winter is **cold + wind + snow/ice**, while summer comfort is often about **humidity (heat index)**.
- • ❄️ Winter (Dec–Feb): traction and staying dry can matter as much as insulation for comfort.
- • 🌦️ Spring (Mar–May): snowmelt means wet, slushy ground—layers and a waterproof option help.
It looks simple on paper, but the day-to-day texture can vary.
Explore Ottawa
These pages are connected so you can compare conditions and decide for yourself.