The weather forecast for Bruno Mars' Sunday concert at Rogers Stadium in Toronto is a cause for concern for fans, especially after the Saturday postponement due to severe weather. While the show is still expected to proceed, Environment Canada predicts chilly temperatures and a 60% chance of evening showers, with temperatures dropping to around 13°C. This raises questions about the comfort and safety of attendees, especially given the open-air nature of the venue. The forecast also impacts the nearby RBC Amphitheatre, where Khalid will perform, as both venues are partially uncovered and rain-or-shine. The Saturday postponement was a challenging decision, with fans divided on whether to brave the weather or cancel the show for public safety. The artist's regretful note and promise to make it up to Toronto on May 31, 2026, offer some solace. However, the question remains: will Sunday's concert be cancelled or postponed? The decision will likely be influenced by the weather conditions and the safety of the audience. As for what fans should bring, small collapsible umbrellas and ponchos are permitted, but large umbrellas are prohibited. Additionally, attendees should prepare for sun protection, as the venue is fully outdoor and operates rain or shine. The key takeaway is that while the show is still on, fans should be prepared for potentially uncomfortable and wet conditions, and the organizers should consider the safety and well-being of the audience in their decision-making process.