Niagara on the Lake Weather in May
Thinking of visiting Niagara on the Lake in May? Expect moderate temperatures reaching 15°C (59°F) during the day, dropping to 6°C (43°F) at night, with some rainfall likely.
Rainfall in Niagara on the Lake in May
You can expect rain on around 9 days based on historical patterns, with 47 mm (1.9 in) average for the month. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.
Temperature in Niagara on the Lake in May
Niagara on the Lake in May gets highs of 15°C (59°F) during the day and drops to 6°C (43°F) at night. Temperatures can feel cooler in the morning and evening, so layering is often the best approach. With lows around 6°C (43°F), nights are cold. The upside is that cool, crisp nights are often the best for a deep sleep.
Sunshine in Niagara on the Lake in May
With approximately 259 hours of sunshine, the days are filled with clear skies. Despite it being a cool month, it makes for pleasant days outside.If you prefer dry days with pleasant temperatures, July and August typically offer the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Canada, check out our Niagara on the Lake's climate page.
Niagara on the Lake Temperature in May
Min Temperature
6°C (43°F)
Max Temperature
15°C (59°F)
Chance of Rain
31%
Precipitation
47 mm (1.9 in)
Rainy days
9 days
Humidity
67% *
Sunshine
259 hours *
Percentage Sunshine
57% *
Daily Historical Temperatures
50-year average (1976-2025)
Based on our historical records, temperatures in Niagara on the Lake typically rise from around 15°C (59°F) at the start of May to approximately 21°C (70°F) by the end. Nights are cool, with lows typically ranging from 6°C (43°F) to 13°C (55°F).
Average temperatures in May
Daily Historical Precipitation
50-year average (1976-2025)
Average daily rainfall for each day of the month based on long-term records.
Average precipitation in May
Historical weather for Niagara on the Lake in May
Browse day-by-day weather records for Niagara on the Lake spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.
Niagara on the Lake historical weather extremes in May
The extremes listed below come from historical weather data collected in Niagara on the Lake from 1976 through 2025.
- On May 21, 1977, temperatures climbed to 33°C (91°F), marking the warmest May day on record.
- On May 7, 1976, Niagara on the Lake saw its coldest May day with temperatures maxing out at 3°C (37°F).
- The coldest night in May in Niagara on the Lake was on May 1, 1978, with a minimum of -2°C (28°F).
Best Places in Canada in May
Find out more about the weather in Canada and which places have the best travel conditions in this month. See all of Canada in May →
perfect weather
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What to Wear in Niagara on the Lake in May
Pack for changing conditions in Niagara on the Lake in May. Bring a mix of short and long sleeves, a warm layer like a hoodie or light jacket, and comfortable pants. The key is being able to add or remove layers as the days goes by. Rain gear is recommended, you can expect wet weather on multiple days. Don't forget sun protection, sunglasses, sunscreen, and a hat. These are all good ideas with this much sunshine.What To Do in Niagara on the Lake in May
We rated the following activities from 1 (least suitable) to 10 (best) to do.
Check the conditions for any month of the year.
For a detailed overview over the year and the best time to visit Canada, check out our Niagara on the Lake's climate page.
Temperature Rainfall Sunshine Humidity
See the full Niagara on the Lake climate overview or explore weather in Canada.
