Advertisement

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.

Advertisement

Matthew's Latest Articles

Tuesday, May 12 – Cool but bright

High pressure builds into the region bringing abundant sunshine but continued cool temperatures for mid May. • High: 58–62°F | Low: 39–43°F | Wind: NW 10–15 mph • Sky: Mostly sunny • Precipitation: 0%

Monday, May 11 – Cooler and breezy

Noticeably cooler air arrives behind the cold front with lower humidity and a mix of sunshine and clouds. • High: 61–64°F | Low: 41–44°F | Wind: NW 10–20 mph • Sky: Partly sunny • Precipitation: 0%

Waltham Weather Outlook: May 9 – May 16, 2026
Sunday, May 10 – Milder with a few scattered showers possible

Mother’s Day looks improved overall with a mix of clouds and some sunshine developing. However, enough moisture lingers in the atmosphere for an isolated afternoon shower or thunderstorm. • High: 71–74°F | Low: 54°F | Wind: SW 10–15 mph • Sky: Partly sunny • Precipitation: 30% chance isolated showers

Saturday, May 9 – Seasonably mild with partial improvement

Early indications suggest somewhat improved conditions, though an isolated shower cannot be ruled out depending on how quickly the late-week system clears. More breaks of sun are possible. • High: 68–71°F | Low: Low to mid 50s | Wind: W 8–12 mph • Sky: Partly sunny • Precipitation: 20–30% chance isolated showers

Friday, May 8 – Variable with lingering shower risk

Unsettled weather may linger as the frontal system slowly exits. Some showers remain possible, though there should also be dry periods mixed in. Temperatures stay mild. • High: 70°F | Low: 55°F | Wind: W to SW 8–15 mph • Sky: Mostly cloudy • Precipitation: 40% chance showers

Thursday, May 7 – More unsettled with better shower chances

A frontal boundary approaches, increasing the likelihood of scattered showers and more widespread cloud cover. While not necessarily a washout, this appears to be one of the wetter days of the stretch. • High: 71°F | Low: 54°F | Wind: S to SW 10–15 mph • Sky: Mostly cloudy • Precipitation: 50–60% chance showers

Wednesday, May 6 – Continued warmth, increasing clouds

Warmth persists with another day well above average, though humidity and cloud cover gradually increase. A few showers may arrive later in the day or overnight. • High: 76°F | Low: 58°F | Wind: SW 10–15 mph • Sky: Partly sunny becoming mostly cloudy • Precipitation: 30–40%

Tuesday, May 5 – Warm, windy, and almost summerlike

A strong southwest flow develops, pushing temperatures into the upper 70s. Breezy to windy conditions are likely, but most of the day stays dry aside from a slight late shower risk. • High: 77°F | Low: 56°F | Wind: SW 15–25 mph, gusts 30+ mph • Sky: Partly sunny • Precipitation: 20%

Monday, May 4 – Improving with sun and milder air

The weekend system pulls away, allowing drier air and increasing sunshine to return. Breezy west winds and moderating temperatures make for a much more comfortable spring day. • High: 69°F | Low: 48°F | Wind: W 10–20 mph • Sky: Partly to mostly sunny • Precipitation: 10%

Close the CTA