Morrisville, Vermont Weather Forecast. Morrisville Weather Forecast – 10 Day. Morrisville 1 – 3 Day Weather Forecast Summary: Heavy rain (total 35mm), heaviest during Sat night. Freeze-thaw conditions (max 20.0°C on Sun afternoon, min -2.0°C on Mon night). Winds decreasing (strong winds from the WSW on Sun afternoon, calm by Mon night).