Mid-summer · Weather & things to do
Portland, Maine in July
Portland, Maine warms up: highs climb to 69°F (21°C), from 62°F in June, with lows of 63°F (17°C) and about 3.8 in (96 mm) of rain.
It scores 72/100 for comfort, 4th of 12, which makes it a solid shoulder-season month.
- Avg high
- 69°F (21°C)
- Avg low
- 63°F (17°C)
- Rain
- 3.8 in (96 mm)
- Humidity
- 88%
- Cloud cover
- 55%
- Daylight
- ~14 h 57 min
- Comfort score
- 72/100 · Good
What July feels like
Expect mild afternoons around 69°F (21°C), good for long walks.
Lows average 63°F (17°C).
Showers are part of the month, adding up to about 3.8 in (96 mm).
Plan around July
July is shoulder season: good weather, a step below the best months (September).
- Comfort slips from 75/100 in June to 72/100.
- July sits inside the May – Oct window our Boston to Portland route recommends.
What to pack for July
- A warm layer for eveningslows near 63°F
- Packable rain jacket or umbrellaa shower or two is likely
- Comfortable walking shoesmost picks involve some walking
What to do in Portland, Maine in July
July is good outdoor weather here, so these picks lean toward the open air.
Casco Bay Lines
Ferries to Peaks Island and the outer islands for a cheap harbor cruise.
Why now Our curated notes say it's best summer.
Portland Museum of Art
Strong Winslow Homer and Maine art collection in the Arts District.
Allagash Brewing Company
Belgian-style brewery with a tasting room and free tours.
The Holy Donut
Maine potato donuts in flavors like dark chocolate sea salt.
Eastern Promenade
Hilltop park and trail with views over Casco Bay and its islands.
Why now July scores 72/100 for comfort, good conditions for being outside.
Nearby in July
- Portsmouth in July~48 mi · highs 74°F, 3.6 in rain · 3°C (5°F) warmer by day, about as wet
- Maine in July~51 mi · highs 79°F, 4.3 in rain · 6°C (10°F) warmer by day, about as wet
- White Mountains in July~67 mi · highs 58°F, 4.7 in rain · 6°C (11°F) cooler by day, wetter
- New Hampshire in July~73 mi · highs 81°F, 3.9 in rain · 7°C (12°F) warmer by day, about as wet
NASA POWER 2001–2025 monthly averages on a ~50 km grid. Comfort scores weigh temperature, rain, humidity and cloud: see how we score each month. Check a forecast before you go.
Portland, Maine in July: quick answers
Is July a good time to visit Portland, Maine?
It's a good shoulder-season choice, scoring 72/100 against a best of 87 in September. Expect highs of 69°F (21°C) and 3.8 in (96 mm) of rain. July is inside the May – Oct window our Boston to Portland route recommends.
How hot is Portland, Maine in July?
Average highs are 69°F (21°C) and average lows 63°F (17°C), making it the 2nd-warmest month by daytime highs.
Does it rain a lot in Portland, Maine in July?
Some: about 3.8 in (96 mm) of rain falls across July on average, the 2nd-driest month of the year. The annual total is about 53.7 in (1363 mm).
What should I pack for Portland, Maine in July?
Bring a warm layer for evenings (lows near 63°F), packable rain jacket or umbrella (a shower or two is likely) and comfortable walking shoes (most picks involve some walking).
More on Portland, Maine
Routes in season in July
- Boston to Portland May – Oct
Planning Portland, Maine in July?
Share this July plan with your group, poll everyone on dates and keep the packing list in one place.