weather in niagara-on-the-lake canada
Average monthly weather in Niagara on the Lake, Canada. What's the best time to go to Niagara on the Lake in Canada? Here are some annual weather facts we collected from our historical weather data: The months May, June, July, August and September have nice weather with a good average temperature. On average, the warmest month is July. On average, the coolest month is January. July is the wettest month. This month should be avoided if you don't like too much rain. October is the driest month.