Done for 2026Part of August 2026 festivals →
Osheaga Weather Forecast 2026
Montreal, Canada
31 Jul 2026 to 2 Aug 2026
95Perfect Montreal summer weekend
PeakWave modelled guidance
Calculated from the event-window weather inputs and independent of the quality score. This is not an official alert.
Evidence limits
Heat-stress evidence unavailable
Maximum-temperature and humidity data is unavailable for this event window.
Thunderstorm evidence partial
Daily storm weather-code data is unavailable for this event window.
Missing evidence is not a safety clearance.
Check official weather advice and follow organiser updates before and during the event. Their instructions take priority over this model.
Parc Jean-Drapeau in the St Lawrence. Continental storms roll through on August afternoons; the island layout funnels wind across the stages.
Quality score
Why this score
The score combines these four event-window quality factors. Safety guidance and packing advice are shown separately.
- Quality factor
Rain and ground
3 mm event rain, 0.9 mm/day average, peak-day rain unavailable, prior seven-day rain unavailable
HelpingMain limiterPartial confidenceEvent rain, antecedent saturation and the wettest day determine how quickly the ground deteriorates.
- Quality factor
Temperature
21°C mean, 15°C low, 28°C peak, 0 consecutive days over 35°C, humidity unavailable
IdealNeutralPartial confidenceDaytime comfort, overnight camping temperatures and cumulative heat shape the whole event experience.
- Quality factor
Atmosphere
Sunshine unavailable, 0 storm days of 3; daily weather codes unavailable
IdealNeutralPartial confidenceSunshine changes outdoor comfort, while thunderstorms directly interrupt stages and force shelter.
- Quality factor
Wind
12 km/h maximum sustained wind; peak gust unavailable
IdealNeutralPartial confidencePeak gusts affect camping comfort and the ability of stages and temporary structures to operate.
How Osheaga 2026 is tracking
1st calmest in 21 years.
20-year distribution
BestWorst
Last 5 years
2021
☀️
0 storms
2022
☀️
0 storms
2023
☀️
0 storms
2024
☀️
0 storms
2025
☀️
0 storms
This year's figure reflects what actually happened during the event window. The 20-year comparison uses weather records for this location across the event window from 2006 to 2025. Individual experience may differ from location-averaged meteorological data, and the festival itself may not have run in every year shown.
What actually happened
2026-07-31 to 2026-08-02Total rainfall
3 mm
Peak temp
28°C
Overnight low
15°C
Mean wind
11 km/h
Thunderstorm days
0
Days over 35°C
0
Nights under 5°C
0
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Tuned to the forecast- High-SPF sunscreen and reapply all day
- Electrolyte tabs
- Reusable water bottle
- Portable charger
Frequently 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 0-100 rating of how Osheaga's event window is shaping up. Rain or dust and ground, temperature, atmosphere and wind contribute as four equal factor groups. Their multipliers are multiplied into one event-window quality score. The festival's primary risk selects the first group's rain-and-ground or dust-and-ground interpretation and shapes the label and historical comparison. It does not give any group extra weight.
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.