Your midday New Hampshire weather update A Special Weather Statement is in effect across multiple regions of New Hampshire this Memorial Day weekend, warning about dangerously cold water temperatures despite the warming air. Lake Winnipesaukee and Sebago Lake are both sitting in the mid-50s, creating serious risks for anyone planning water activities today. Rain arrives around noon and continues through the afternoon, with the heaviest downpours expected between 2 and 3 P.M.