Unseasonably warm week ahead | Sept. 29, 2025INDIANAPOLIS (WISH) — Unseasonably warm and dry weather is expected to persist throughout the week, with temperatures reaching the upper 80s and potentially hitting 90°F in some areas. A large upper-level ridge and high-pressure system are driving these conditions, resulting in warm afternoons and mostly clear skies. Clear and calm nights will create conditions for patchy areas of dense fog, particularly near rivers and agricultural areas. Canadian high-pressure will reinforce clear skies and warm afternoons. Rain chances are near 0 through the weekend, as the upper and surface ridges prevent moisture from moving into the Midwest.