Wellesley, Mass., weather forecast for June 26-July 4, 2025

Here’s the updated daily weather forecast from Thursday, June 26th to Friday, July 4th by Meteorologist Matthew Moll of New England Weather Consulting:

Relief is here. A backdoor cold front has swept through the region, dropping temperatures and humidity dramatically across Eastern Massachusetts. The transition from oppressive to refreshing is already underway, with highs in the 70s for several days. Expect low clouds, onshore breezes, and occasional showers as cooler marine air dominates. Heading into next week, the pattern flips again as warming resumes by Sunday with 80s returning, and the potential for thunderstorms increases. The first days of July may flirt with summer heat again.

Looking ahead to Independence Day, an early read suggests warm and mostly sunny weather for July 4 across Eastern Massachusetts, great for outdoor plans. However, as of this writing it’s still several days out, so we will keep you posted if there are any significant changes.

Thursday, June 26
Cool, overcast conditions settle in as marine air flows in behind the cold front. Temperatures will be 20 to 30 degrees cooler than earlier in the week, with noticeably lower humidity. A few stray showers could form in the afternoon, but most of the day remains dry.
• High: 70 to 72°F | Low: 60°F | Wind: E 6 to 9 mph
• Sky: Mostly cloudy throughout the day
• Chance of Rain: 20 percent (late-day spot shower possible)
• Dew Point: 55 to 58°F (Comfortable)

Friday, June 27
The cool pattern continues with thick cloud cover and a few passing morning showers. Temperatures stay well below normal for late June, especially with persistent easterly winds and limited sunshine.
• High: 68 to 70°F | Low: 59°F | Wind: E 5 to 8 mph
• Sky: Mostly cloudy to overcast
• Chance of Rain: 30 percent (morning showers)
• Dew Point: 58 to 61°F (Becoming sticky)

Saturday, June 28
An unsettled and damp day across much of the region. Expect a mix of showers and possible thunderstorms in the afternoon and evening. While it won’t be a washout, it’s a good idea to have indoor backup plans.
• High: 69 to 71°F | Low: 62°F | Wind: E 6 to 8 mph
• Sky: Mostly cloudy with increasing afternoon showers
• Chance of Rain: 60 percent (afternoon and evening storms possible)
• Dew Point: 62 to 65°F (Humid)

Sunday, June 29
Lingering clouds and spotty morning showers gradually clear, allowing for a few breaks of sunshine later in the day. Temperatures begin to rise slightly as winds turn more northeasterly.
• High: 72 to 74°F | Low: 63°F | Wind: NE 5 to 7 mph
• Sky: Mostly cloudy with some late breaks of sun
• Chance of Rain: 30 percent (morning showers)
• Dew Point: 63 to 66°F (Humid)

Monday, June 30
Warmer air returns with a noticeable increase in temperatures and humidity. A mix of sun and clouds is expected, with only a small chance of a passing shower.
• High: 84 to 86°F | Low: 68°F | Wind: S 6 to 9 mph
• Sky: Partly sunny
• Dew Point: 65 to 68°F (Sticky)

Tuesday, July 1
Hot and humid conditions return. A disturbance may trigger afternoon or evening thunderstorms, some of which could be strong. Expect a typical midsummer feel with uncomfortable air.
• High: 86 to 89°F | Low: 70°F | Wind: SW 8 to 12 mph
• Sky: Partly sunny early, with clouds and storms developing later
• Chance of Rain: 60 percent (afternoon and evening storms likely)
• Dew Point: 67 to 71°F (Oppressive)

Wednesday, July 2
A more stable and slightly less humid day, though it still feels very much like summer. After a few clouds early, sunshine should dominate. A stray pop-up shower is possible, but most areas stay dry.
• High: 86 to 88°F | Low: 68°F | Wind: W 6 to 9 mph
• Sky: Mostly sunny with a few late clouds
• Chance of Rain: 20 percent (slight storm chance late)
• Dew Point: 64 to 68°F (Sticky)

Thursday, July 3
One of the most pleasant days of the stretch. High pressure brings sunny skies, low humidity, and seasonable warmth—great weather for getting a head start on the holiday.
• High: 82 to 85°F | Low: 66°F | Wind: NW 5 to 8 mph
• Sky: Mostly sunny
• Dew Point: 60 to 63°F (Comfortable)

Friday, July 4
An early look at Independence Day points to fantastic summer weather. Expect warm temperatures, mostly sunny skies, and comfortable humidity—ideal for cookouts, parades, and fireworks.
• High: 84 to 87°F | Low: 66 to 68°F | Wind: SW 5 to 9 mph
• Sky: Mostly sunny throughout the day
• Dew Point: 62 to 65°F (Comfortable to slightly sticky)

Interested in sponsoring our weekly weather reports? Learn more about advertising on Swellesley.