Osheaga Weather Forecast 2026
Montreal, Canada
31 Jul 2026 to 2 Aug 2026
Parc Jean-Drapeau in the St Lawrence. Continental storms roll through on August afternoons; the island layout funnels wind across the stages.
Comparison is building for this festival.
20-year distribution
Last 5 years
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Post a jobFrequently asked questions
How often is this page updated?
Current conditions refresh daily at 07:00 UTC from our cron. Forecasts cache for 6 hours; climate averages for 24 hours; the 20-year historical distribution refreshes weekly.
What does the conditions score mean for Osheaga?
A single 0-10 rating of how Osheaga's event window is shaping up, weighted toward the festival's primary risk (thunderstorms and heavy rain bursts). Above 7 means likely good, 4-6 is mixed, below 4 means prepare for the worst.
Where does the weather data come from?
Open-Meteo, an open weather API that blends multiple national weather services plus ERA5 archive data going back to 2006. The same data powers many outdoor apps.
Does the historical comparison mean the festival ran every year?
No. The 20-year comparison uses weather records for this location and event window regardless of whether the festival itself ran that year. That gives us a consistent 20-year sample even for festivals that started more recently.
What should I pack for Osheaga 2026?
See the "Pack for it" section above. The list is generated from the current forecast, tuned to the temperatures, rain probability, and primary risk you will actually face.