SeasonMapNiagara Falls weather in May
Canada
May in Niagara Falls: nice, a little rain — an excellent time to visit.
#3 of 12 months in Niagara Falls · #458 of 1383 destinations to visit in May · comfort 85/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Niagara Falls in May
Other months in Niagara Falls
Niagara Falls' forum rates June as a genuine sweet spot — summer weather without July and August's peak crowds, since Canadian schools are still in session for most of the month. Regulars note late June already runs into the high 70s°F, with shorts weather standard by then.
Add your own note from Niagara Falls's card on the map.
Niagara Falls climate normals — May
| Daytime high | 20°C / 68°F | 😎 nice |
|---|---|---|
| Nighttime low | 9°C / 48°F | |
| Feels like (high) | 19°C / 66°F | |
| Rainfall | 76 mm / 3 in | 🌦 some rain |
| Rainy days | 10 days | |
| Humidity | 71% | 💧 humid |
| Dew point | 8°C / 46°F | |
| Sunshine | 10.5 h/day | |
| Daylight | 14.7 h | |
| Wind | 19 km/h / 12 mph | |
| Snowfall | 0.1 cm / 0 in | |
| Air quality (US AQI) | 62 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Niagara Falls in May
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Busyone of its best months for weather(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Niagara Falls's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherNiagara Falls's best weather comes in May, June and September — separate windows, not one continuous season.
Best weatherFair weatherToughest weather
What's on in Niagara Falls in May
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Opening
Falls boat season
24 Apr – 30 Nov · usuallySummer season opensClosuresThe boats run from late April to the end of November and are the only way to get under the falls. Out of season the docks are dismantled and the wet alternative is the tunnels behind the sheet. Source ↗
Nearby, and something's on
Within 300 km of Niagara Falls — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Niagara Falls?
Niagara Falls in May — FAQ
- Is May a good time to visit Niagara Falls?
- May in Niagara Falls: nice, a little rain — an excellent time to visit. It ranks #3 of 12 months for Niagara Falls on SeasonMap's comfort score (85/100).
- What is the weather like in Niagara Falls in May?
- In May, Niagara Falls averages a daily high of 20.2°C and a low of 8.8°C, with about 76 mm of rain over roughly 9.8 rainy days.
- What is the air quality in Niagara Falls in May?
- Niagara Falls has a mean US Air Quality Index of about 62 in May.
Other months in Niagara Falls
Compare Niagara Falls in May
Warmer or cooler than Niagara Falls in May
Similar destinations in North America — May
Within 300 km: Toronto's High Park cherry blossom around 22 Apr – 10 May.