Matthew Moll

Tuesday, June 24 — Scorching Again, with a Storm Risk in Waltham 

Another sweltering day in Waltham. Highs in the mid-90s continue with extremely muggy air. Storms may develop by late afternoon or evening, especially west of I-95 and along higher terrain, but some could drift into town. • High: 94 to 96°F | Low: 74°F | Wind: W 6 to 9 mph • Sky: Mostly sunny early, with clouds and storm chances developing mid-to-late afternoon • Chance of Rain: 30% (PM storms possible) • Dew Point: 70 to 73°F (Oppressive) 

Monday, June 23 — Peak Heat and Humidity for Waltham 

Likely the hottest and most uncomfortable day of the week. Temperatures soar into the mid-90s across Waltham, and when paired with oppressive dew points, it may feel more like 100 to 105°F. Some haze may develop in the afternoon. A stray thunderstorm can’t be ruled out late. • High: 92 to 95°F | Low: 73°F | Wind: WSW 5 to 8 mph • Sky: Sunny to partly hazy skies with late-day cumulus possible • Chance of Rain: 20% (isolated PM storms) • Dew Point: 70 to 74°F (Oppressive) 

Sunday, June 22 — Heat and Humidity Build Over Waltham 

Hot and humid conditions arrive in full. Southwest winds funnel in warm, moist air, pushing highs close to 90°F in most of Waltham, with little relief even into the evening. The day starts sunny, but clouds begin to increase by late afternoon. • High: 88 to 90°F | Low: 70°F | Wind: SW 6 to 9 mph • Sky: Mostly sunny morning, partly cloudy by late afternoon • Dew Point: 66 to 70°F (Humid to Oppressive) 

Saturday, June 21 — Warm, Dry, and Turning More Humid in Waltham 

Waltham enjoys another beautiful day with plenty of sunshine and warm afternoon temperatures. As winds shift slightly from the southwest, humidity will increase through the evening. Expect a sticky feel to return after sunset, especially in lower-elevation areas of the city. • High: 85 to 87°F | Low: 68°F | Wind: WSW 4 to 7 mph • Sky: Mostly sunny with increasing high clouds by evening • Dew Point: 60 to 65°F (Noticeably Humid) 

 Friday, June 20 — Seasonable and Sunny in Waltham 

High pressure brings ideal summer weather to Waltham. Expect sunshine from start to finish, with just a few clouds popping up late in the day. A light northwest breeze keeps the air dry and comfortable. Conditions stay uniform across the city. • High: 80 to 82°F | Low: 61°F | Wind: NW 8 to 12 mph • Sky: Bright and sunny from morning through afternoon, with a few scattered clouds late • Dew Point: 55 to 58°F (Comfortable) 

Waltham Weather Outlook: June 20 to June 27 

Thursday, June 19 — Early Summer Feel, Increasingly Muggy

Warmth builds in under partly sunny skies. While mainly dry, a stray late-day thunderstorm can’t be ruled out. Humidity levels become higher, and the evening stays mild. • High: 82–84°F | Low: 64°F | Wind: SW 7–10 mph • Chance of rain: 20% 

Wednesday, June 18 — Warm and More Humid with Pop-Up Storm Risk

A warmer and more summerlike day with highs approaching the low 80s. Expect a mix of sun and clouds with a few afternoon showers or thunderstorms possible. The humidity begins to creep up. • High: 80–82°F | Low: 61°F | Wind: SW 6–9 mph • Chance of rain: 40% (PM pop-up showers and thunderstorms) 

Tuesday, June 17 — Partly Sunny, Isolated Showers Possible

Sunshine gives way to increasing clouds ahead of another approaching system. Slightly warmer and more humid. A few scattered showers or a thunderstorm could pop up late. • High: 73–75°F | Low: 58°F | Wind: SE 5–8 mph • Chance of rain: 30% (PM showers/storms) 

Monday, June 16 — Mostly Sunny and Milder

High pressure builds back in, clearing out the clouds and nudging temperatures higher. Expect pleasant conditions with light easterly winds. A refreshing start to the workweek. • High: 68–70°F | Low: 55°F | Wind: E 5–8 mph