Boston Weather Update: This Week’s Forecast, Storm Chances & Temperature Swings You Need to Know

Bostonians woke up this Wednesday, September 10, to damp, gray skies and temperatures hovering around 66 °F (19 °C) at Logan International Airport. Morning clouds will keep a lid on sunshine, but the mercury should settle near the upper-50s overnight, making it a cool evening for commuters and early-morning runners. Short-Term Outlook (Today–Thursday) • Today: Overcast, light northeast breeze near 10 mph; stray drizzle possible. • Thursday: A welcome burst of late-summer warmth returns as highs climb to 74 °F/24 °C under broken clouds before dropping to a refreshing 57 °F overnight. Expect lighter winds and improved air quality—ideal conditions for lunch on the Greenway or an outdoor lecture on Boston Common. Weekend Weather for Boston, MA Friday stays seasonably cool (67 °F/19 °C) with morning clouds yielding to filtered sunshine. Saturday trends milder, topping out near 70 °F, but sprinkles could arrive late day as a weak coastal disturbance slides by. The wettest period looks to be Sunday into Monday, when passing showers could deliver up to 0.60" of rain and keep highs stuck in the upper-60s—pack a poncho for Gillette Stadium or Fenway outings. 14-Day Forecast Highlights • Sept 16-18: High-pressure ridge brings a mini-heat bump; sunny skies push temps to 77 – 81 °F with low humidity. • Sept 20-22: Pattern turns unsettled; another frontal boundary raises shower chances and breezy eastern winds. • Sept 23-24: Cooler, crisp air returns, highs in the mid-60s—classic early-fall New England weather perfect for leaf-peeping day-trips west of Route 128. Why the Flip-Flop Pattern? A blocking high over the Canadian Maritimes is seesawing between on-shore flow (clouds, mist) and brief southerly warm-ups. Until the jet stream fully relocates north for autumn, Boston will ride this roller-coaster of 60-degree days punctuated by short shots of 80-degree warmth. What It Means for You • Commute: Expect damp roads at dawn today and again late Sunday; allow extra braking distance on the Pike. • Health: Ragweed pollen remains moderate; Thursday’s dry spell offers the cleanest air of the week. • Events: Outdoor weddings and college move-ins favor Thursday–Saturday noon; have indoor backup plans Sunday. • Travel: Logan departures Thursday morning should enjoy minimal wind delays; Monday’s light rain could introduce minor arrival holds. Bottom Line Keep the layers handy—Boston’s weather will ping-pong between sweatshirt mornings and T-shirt afternoons over the next two weeks. Bookmark this forecast so you’re not caught off-guard when the next round of showers rolls through the Hub.