As warm weather persists, experts predict a delay in the fall season and its vibrant leaf colors. Higher temperatures may result in slower color changes and less vivid hues, affecting the typical autumn landscape. Changes in weather patterns could also influence how long the fall foliage lasts, prompting nature enthusiasts to adjust their plans for enjoying this seasonal spectacle. 'A trend of above-normal temperatures' is forecasted for the rest of September and October across the country, according to Global News meteorologist Ross Hull.