Boston, Massachusetts – A milder air mass pushing into southern New England ahead of St. Patrick’s Day will shift much of Massachusetts toward rain, but nighttime cooling could still allow brief rain-to-snow transitions between March 11 and March 17.
According to the National Weather Service Climate Prediction Center, Massachusetts remains within a 40-50% probability zone for above-normal precipitation during the 8-14 day period. Temperatures are projected to trend near to slightly above seasonal averages statewide. That warmer pattern favors daytime rainfall for most communities, though marginal overnight readings may still support wet snow in spots.
In Boston and along the Interstate 95 corridor, daytime highs climbing into the 40s could keep most precipitation liquid. However, if steadier precipitation lingers after sunset and temperatures dip into the lower 30s, wet snow could briefly accumulate on grassy areas and untreated secondary roads. Along Interstate 90 from Springfield through Worcester, slightly cooler inland surface temperatures may support more consistent snow during pre-dawn hours.
Higher elevations in Berkshire County remain more likely to see accumulating snow with each passing system, especially overnight when temperatures cool more efficiently. Heavier bursts could briefly reduce visibility statewide regardless of precipitation type.
Drivers across Massachusetts should monitor overnight and early morning road conditions where temperatures hover near freezing. Even brief wet snow can create slick spots on bridges and elevated roadways. Additional updates are expected as the March 11-17 window approaches and system timing becomes clearer.
