Unseasonal rainfall and hailstorm events cause catastrophic damage to high-value horticultural crops in India, resulting in annual losses exceeding INR 50,000 crore. This paper presents AutoShield, a novel IoT-integrated motorized canopy protection system designed specifically for grape, pomegranate, strawberry, and flower farmers. The system employs a multi-sensor array including barometric pressure sensors (BMP280), temperature-humidity sensors (DHT22), rain detection modules, and light-dependent resistors (LDR) connected to an ESP32 microcontroller. Upon detecting imminent rainfall through sensor fusion logic, the system automatically deploys a durable PVC-coated polyester canopy over the protected farmland. The canopy design incorporates a gravity-assisted counterweight mechanism for energy-efficient deployment, a peripheral rainwater collection pipeline network for water harvesting, and windbreak mesh side panels for structural stability. The system operates fully offline with optional Bluetooth and WiFi based mobile dashboard control, and is powered by an off-grid solar panel and battery unit. Prototype evaluation demonstrates successful rain prediction and canopy deployment with an average response time of under 90 seconds. The modular unit design supports customization from 20x20 ft to 100x100 ft coverage areas, making it economically viable at INR 15,000-80,000 per unit with a projected 10-15 year operational lifespan. This paper details the system architecture, hardware design, sensor logic, material selection, economic analysis, and deployment strategy.