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Author

Matthew Moll

Matthew Moll is a degreed meteorologist, founder of New England Weather Consulting, and a member of both the American Meteorological Society (AMS) and National Weather Association (NWA). He provides hyper-local, science-backed forecasts for communities across Massachusetts.

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Matthew's Latest Articles

Thursday, August 20

Partly sunny and seasonable. Forecast confidence is lower this far out, but much of the day currently looks dry. Another disturbance could eventually bring a chance of showers or thunderstorms, with the timing still uncertain. High: 83°F | Low: 64°F

Wednesday, August 19

Mostly sunny and a little warmer. Temperatures should climb into the lower to middle 80s while humidity remains relatively comfortable. The day currently looks mainly dry. High: 84°F | Low: 63°F

Tuesday, August 18

Drier air returns behind Monday’s system. Expect mostly sunny skies, seasonable temperatures, and comfortable humidity. High: 82°F | Low: 61°F

Monday, August 17

Showers are likely, particularly during the morning, as a cold front crosses southern New England. There could be periods of heavier rain given the amount of moisture available to the system. Rain should become less widespread later in the day, although the exact timing remains uncertain. High: 79°F | Low: 62°F

Sunday, August 16

Sunday should begin dry with sunshine before clouds gradually increase during the afternoon. Humidity will also start to creep upward as winds turn southwest. Most of the daytime should remain dry, with showers becoming more likely Sunday night. High: 82°F | Low: 66°F

Friday, August 14 – Beautiful late-summer day

A beautiful late-summer day with plenty of sunshine and much lower humidity. A northwest breeze will bring in cooler and drier air throughout the day. Friday night will be clear and comfortably cool. High: 81°F | Low: 57°F

Waltham Weather Outlook: August 13–20, 2026
Thursday, August 13 – A transition day

A transition day as a stronger push of cooler and drier air begins approaching southern New England. Expect partly cloudy skies with a chance of scattered showers and thunderstorms. It will remain warm and somewhat humid with a high in the mid-80s, but noticeably more comfortable air should begin arriving Thursday night. Low near 62°F.

Wednesday, August 12 – Continued hot and humid

Continued hot and humid with a mix of sun and clouds. Highs will reach the upper 80s, and the humidity may make it feel warmer. Another disturbance approaching New England could bring scattered showers or thunderstorms, especially later in the day or Wednesday night. Low near 67°F.

Tuesday, August 11 – Hot and increasingly humid with partly sunny skies

Hot and increasingly humid with partly sunny skies. Temperatures will again climb into the upper 80s to near 90°F, with dew points reaching the upper 60s. A passing shower or thunderstorm cannot be completely ruled out, but there should be plenty of dry weather during the day. Low near 69°F.

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