Wednesday will be the last day of warmth before the weather pattern flips across New England, with a southerly flow pushing milder air into the region and giving Boston one more mild afternoon. Commuters in eastern Massachusetts can expect temperatures in the upper 50s and 60s, while Boston should stay in the 60s under cloudy skies and a few spots could briefly touch 70 degrees by late morning or early afternoon.
The coast will stay a few degrees cooler, with the Cape likely lingering in the low 60s, but the air will still feel more like spring than early April. Southerly winds may reach 15 to 25 mph at times, and dew points are expected in the mid-50s regionwide, adding a little dampness to the warmth before a front begins working through New England later in the day.
Eastern Massachusetts and Rhode Island should be dry when people head to work Wednesday, and Boston is expected to pick up hardly any rain. The first round of showers and general thunderstorms is set to spread through Vermont and western Massachusetts in the morning, with rain reaching Connecticut by then as well. By the evening, showers and thunderstorms are expected to reach Greater Boston and the coast, while southern New England starts to lose the day’s dry edge.
The day will not look the same from one part of the region to another. Greater Boston is forecast to stay mostly cloudy with highs near 70 and scattered showers during the afternoon and evening. Central and western Massachusetts are expected to remain mostly cloudy to overcast, with showers and general thunderstorms lingering through much of the day. Southeastern Massachusetts should see scattered showers in the afternoon and evening, while Cape Cod and the Islands can expect showers that arrive during the afternoon and last into the night. Rhode Island is also in line for scattered showers in the afternoon and evening. New Hampshire should see scattered showers, steady rain and general thunderstorms during the afternoon and evening, Vermont rain in the morning, Maine showers pushing in during the afternoon and evening, and Connecticut rain beginning in the morning.
Rain totals will be modest in Boston but more noticeable farther west and north, where western Massachusetts and northern New England may see around a half inch and isolated totals up north could come closer to an inch. The front and the rain are expected to clear the region by Thursday, leaving mostly dry and cooler conditions behind. A secondary low may form just south of New England by early Thursday morning, but the bigger story is the change already underway: one warm day gives way to a cooler, quieter end to the week.
