Smart weather logic can reduce watering based on forecast or observed data, but a physical rain sensor measures conditions at the property itself.
Start with the constraint
A local sensor can provide direct stop input even when internet weather data is delayed, inaccurate for the microclimate, or unavailable.
What changes the decision
Not every controller combines sensor input with smart weather logic in the same way, and an old sensor may not be compatible with a new controller.
What to verify before buying
Check sensor terminals, supported sensor types, and how the controller prioritizes local rain input versus cloud weather adjustments.
How we research smart irrigation
We compare water source, delivery method, zone or plant capacity, local fallback controls, schedule logic, connectivity, sensors, pump or valve compatibility, subscriptions, and what happens when internet service is unavailable.
Prices, specifications, firmware, inventory, and configuration-driven features can change. Check the current manufacturer or retailer page and local requirements before buying or installing equipment.