Ottawa Weather in May
Canada · May climate averages and travel tips
Avg high19°C (66°F)
Avg low7°C (44°F)
Rainfall78 mm (3.1 in)
RatingExcellent 8.1/10
In May, Ottawa has average highs of 19°C (66°F) and lows of 7°C (44°F). May is spring in Canada. The month is moderately rainy, with about 78 mm (3.1 in) of rain spread over 13 days. You get roughly 14.7 hours of daylight and frequently cloudy skies.
Is May a good time to visit Ottawa?
Yes — May is one of the best months to visit Ottawa. The weather rates excellent (8.1/10) on our comfort score.
May weather at a glance
| Average high | 19°C (66°F) |
|---|---|
| Average low | 7°C (44°F) |
| Daily mean | 13°C (55°F) |
| Rainfall | 78 mm (3.1 in) |
| Rainy days (1 mm+) | 13 |
| Humidity | 76% |
| Cloud cover | 63% |
| Daylight | 14.7 hours |
| Est. sunshine | 6 hours/day |
| Wind | 1.1 km/h |
| vs April | 8°C warmer than April, with 11 mm less rain. |
What to pack for Ottawa in May
- T-shirts plus a light layer for the evening
- a sweater for cool nights
- an umbrella or rain jacket
Ottawa weather in other months
Jan-6°C / -16°C64 mmPoorFeb-5°C / -15°C55 mmPoorMar2°C / -9°C61 mmPoorApr11°C / 0°C89 mmFairMay19°C / 7°C78 mmExcellentJun23°C / 12°C102 mmGoodJul26°C / 15°C103 mmFairAug25°C / 15°C94 mmGoodSep22°C / 10°C81 mmExcellentOct14°C / 4°C93 mmFairNov5°C / -3°C65 mmPoorDec-3°C / -11°C81 mmPoor
← AprilBest time to visit OttawaJune →
Better weather in May nearby
- Los Angeles, California25°C · 8 mm · Excellent
- Cabo San Lucas28°C · 1 mm · Excellent
- San Diego, California24°C · 8 mm · Excellent
- San Francisco, California19°C · 18 mm · Excellent
- Tijuana24°C · 8 mm · Excellent
- Denver, Colorado23°C · 65 mm · Excellent
Nearby in May
- Montreal17°C · 82 mm
- Toronto15°C · 57 mm
- Quebec16°C · 97 mm
- Boston, Massachusetts19°C · 93 mm
- The Bronx, New York20°C · 96 mm
- Manhattan, New York20°C · 96 mm
Where else is good in May? See where to go in May.