Bihar heads into September 2025 with days around 27–34°C, muggy nights, and 8–15 rainy days. Patna mirrors the state trend. The hottest average is expected around Sept 1, while the coolest readings fall near Sept 30. Gaya could touch 97°F at midday; Aurangabad carries a 50% rain chance around Sept 20 with light southwesterly winds. Hydration and rain gear will matter.