Onion prices in India are expected to remain steady or increase slightly until Diwali due to potential crop damage from excessive rainfall. This has caused prices of onions and other vegetables like tomatoes, cabbage, and bottle gourd to rise. The weather is expected to continue impacting prices until a new crop arrives in December. The Ministry of Consumer Affairs is releasing onions from buffer stocks in states where prices are higher than the national average. Despite the higher prices, demand for onions remains low, helping to keep prices from rising too much.