Monthly weather overview

Ottawa monthly weather overview Canada · 오타와

A quick, year-round overview of monthly and seasonal weather in Ottawa. Use this page to get a feel for which months and seasons match your travel style.

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Ottawa weather at a glance

• Ottawa has a strong **continental** pattern: long, cold winters with snow, and warm to hot summers where humidity can raise the heat index.
• In winter, wind, snow, and icy sidewalks often shape comfort as much as temperature.
• Spring is a transition: snowmelt, rain, and shifting wind can make days feel changeable.
• Summer can feel humid; shade and indoor breaks help on sticky days.
• Packing works best when you plan for wind, winter traction, and summer humidity.

Dec · Jan · Feb

Winter (cold + snow): wind chill and footing matter

Avg low -14 to -10°C / high -6 to -2°C · Precip days: 10–15 / ~45–80 mm

• Wind can push perceived temperature lower.
• Snow and ice change walking comfort quickly.
• Indoor heating makes layers useful.

Suggested outfits

· Puffer/coat + layers
· Optional traction

A note for travelers

In winter, walking safely on icy ground can matter as much as warmth.

Mar · Apr · May

Spring (variable): snowmelt, rain, and big swings

Avg low -6 to 10°C / high 2 to 21°C · Rainy days: 8–12 / ~50–90 mm

• March can still feel winter-like; May is often more comfortable.
• Wet ground and slush can be common during melt periods.
• Layering is the most efficient strategy.

Suggested outfits

· Jacket + layers
· Optional waterproof option

A note for travelers

Spring can feel like warm sun and cold wind in the same day.

Jun · Jul · Aug

Summer (warm/hot + humid): heat index and storm bursts

Avg low 16–19°C / high 24–28°C · Rainy days: 7–11 / ~70–110 mm

• Humidity can raise perceived heat.
• Short thunderstorms can happen.
• Strong A/C indoors can make a thin layer useful.

Suggested outfits

· Breathable clothing
· Optional indoor layer
· Optional rain option

A note for travelers

In summer, humidity often decides comfort more than temperature alone.

Sep · Oct · Nov

Fall (crisp): comfortable early, much cooler by November

Avg low -5 to 12°C / high 4 to 22°C · Rainy days: 7–11 / ~55–95 mm

• September can feel great for walking.
• By October and November, evenings cool down fast.
• Wind can add chill.

Suggested outfits

· Light coat/jacket + layers
· Optional umbrella

A note for travelers

Fall layering pays off most when plans include evenings.

Want detailed monthly weather?

Pick a month below to see detailed average temperatures, rainfall, outfit ideas, and travel tips.

January February March April May June July August September October November December

Explore Ottawa

These pages are connected so you can compare conditions and decide for yourself.

Current weather

Forecasts for Ottawa

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Best time to visit

When it tends to fit

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What to wear

How people usually dress

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Climate

Heat, rain, seasonality

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Monthly hub

Jan–Dec at a glance

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