Manchester, New Hampshire – A milder air mass building into New England ahead of St. Patrick’s Day will steer more of New Hampshire’s upcoming systems toward rain, but nighttime cooling could still flip precipitation to wet snow between March 11 and March 17.
According to the National Weather Service Climate Prediction Center, New Hampshire 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 shift favors rainfall during the day, though marginal overnight readings may still allow rain-to-snow transitions.
In Manchester and Nashua, daytime highs reaching 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 93 from Concord north toward Plymouth, slightly cooler surface temperatures may support more consistent snow during pre-dawn hours.
Higher elevations in the White Mountains, including Franconia Notch and North Conway, remain more likely to see accumulating snow with each passing system, particularly overnight when temperatures cool more efficiently.
Drivers across New Hampshire should monitor overnight and early morning travel conditions where temperatures hover near freezing. Even brief wet snow can create slick spots on bridges and higher terrain. Additional updates are expected as the March 11-17 window approaches and storm timing becomes clearer.
