Weather for Grassy Knob Church, AR - Grassy Knob Church, AR Weather, Current Weather in Grassy Knob Church, AR. Local weather report for Grassy Knob Church, AR, Local Grassy Knob Church, AR weather. Forecast for Grassy Knob Church, Arkansas, Grassy Knob Church, AR weather forecast. Find your local Grassy Knob Church weather forecast. Grassy Knob Church, AR weather conditions.