Boston Weather in July

🇺🇸 United States

28°C

High

19°C

Low

Rain Days

12h

Sunshine

65%

Humidity

North America › 🇺🇸 United States › Boston

Updated: March 2026

Is July a Good Time to Visit Boston?

6/10

Good

July is a good time to visit Boston (6/10). With 12 daily sunshine hours and only 10 rain days, this month delivers genuinely reliable outdoor conditions, ranking it the sunniest month of the year in Boston. Culture-focused travellers and those who prefer lighter crowds will find July a practical choice, with prices running lower than peak July without sacrificing all the good weather. August offers a similar profile at lower hotel rates if dates are flexible. The main practical note: Boston's popular sites are busiest between 10am and 3pm regardless of season. Arriving at opening time or after 4pm makes a significant difference to the experience. Planning tips: accommodation is generally available without long lead times, and flight prices are typically lower than peak season. Flexible travellers will find the best deals by booking 2-4 weeks ahead. Mid-week arrivals consistently unlock lower hotel rates than weekend check-ins.

vs June:25°C avg high

Boston's July weather is shaped by atmospheric forces that make the data more than just numbers. The 28°C average high reflects the dominance of a stable subtropical air mass, which suppresses cloud formation and concentrates solar energy at the surface. As a result, 12 daily sunshine hours are recorded on average, and rainfall of 74mm is distributed across approximately 10 days because precipitation events tend to be frequent but short-lived.

28°C

Avg High

19°C

Avg Low

10 days

Rain Days

12h

Sunshine

65%

Humidity

Temperature in Boston in July

The 9°C day-night temperature range is typical for continental climates: a light jacket in the morning that you shed by midday and need again after sunset. Humidity averages 65%, which is comfortable for most visitors. On warmer days, lighter fabrics help with the mild stickiness in the afternoon. UV index averages 9 this month, classed as high to very high. SPF 30+ sunscreen, a brim hat, and sunglasses are not optional between 10am and 4pm. Wind averages 17 km/h, light enough to be refreshing on warm days but noticeable in open coastal areas or elevated viewpoints. In Fahrenheit: 82°F average high, 66°F overnight low. Data sourced from Open-Meteo ERA5 climate reanalysis (1991–2020 normals).

Temperature in July

Monthly Precipitation (mm)

What to Wear in Boston in July

Morning19°CBefore the day warms up

Afternoon28°CPeak daytime temperature

Evening22°CAfter sunset cools down

Packing for Boston in July means dressing for 28°C days and 19°C evenings. A light cotton tee with a casual overshirt works well at 28°C, the overshirt doubles as a layer for air-conditioned venues. Evening temperatures settle at 19°C, a modest 9°C drop that a light cardigan or denim jacket covers. Comfortable walking trainers are the versatile choice for both outdoor sightseeing and indoor venues. A compact foldable umbrella weighs almost nothing and earns its keep across 10 potential rainy days.

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Local tip: Layers are more practical than a single heavy garment in Boston. The day-to-evening temperature shift rewards packing a versatile mid-layer you can add or remove as conditions change.

Events in Boston in July

July has no major festivals or public holidays in Boston, which is one of its practical advantages for independent travellers. Attractions run at lower capacity than during peak event periods, queues are shorter, and accommodation is easier to find without needing to book many months in advance. Local restaurants, markets, and transport operate at a relaxed pace, making this an ideal time for visitors who prefer a more authentic, unhurried experience of everyday city life rather than large crowds drawn in by a single major headline event.

What to Pack for Boston in July

Based on 28°C average highs and 10 rainy days

Light layers for morning and evening
Breathable T-shirts and comfortable trousers
UV-protective sunglasses
Quick-dry travel towel
Anti-chafe balm for long walking days
Moisture-wicking synthetic fabrics for active days
Compact folding umbrella
Waterproof outer layer or packable rain jacket
Quick-dry clothing that recovers fast after a shower
SPF 30+ sunscreen
Comfortable walking shoes (a second pair lets the first air out overnight)
Universal travel adapter
Small day pack for city exploration
Reusable water bottle

Best Activities in Boston in July

Explore outdoor markets and street food stallsMid-morning (10am-12pm)At 28°C, the temperature is ideal for extended walking without overheating
Guided walking tour of the historic centreMorning or late afternoonComfortable temperatures allow several hours on foot without fatigue
Visit rooftop viewpoints and observation decksGolden hour (1 hour before sunset)Warm clear evenings provide exceptional visibility for panoramic photography
Day trip to the surrounding countryside or coastFull day (depart by 8am)July is reliably dry enough for rural day trips without weather risk
Afternoon in a world-class museum or galleryAfternoon (2-5pm)Pairs well with outdoor morning activities and provides a mid-day rest from sightseeing
Coffee-house or traditional cafe culture experienceMid-morning or post-lunchA cultural ritual in this region that rewards slow appreciation regardless of weather
Evening live music, theatre, or opera performanceEvening shows typically at 7-9pmConsistent evening temperatures make getting to and from evening venues comfortable
Visit the main botanical garden or city park at seasonal peakYear-round; best light in morningJuly brings distinct seasonal changes to public green spaces worth exploring
Seek out chilled local specialities: cold-brew tea, ice desserts, or chilled seafood at street-level stallsAny time; most atmospheric in evening marketsHot-weather street food culture peaks in July, with vendors setting up specifically for warm evenings

Why is Boston warm in July?

July in Boston reflects a mid-latitude climate pattern, with temperatures averaging 28°C by day and 19°C overnight. The city sits at 42 degrees north latitude, where the balance between solar radiation and heat loss drives conditions that are neither extreme nor static. The warm temperatures reflect a stable high-pressure pattern typical of the season, which suppresses cloud formation and concentrates solar energy at the surface. Day-to-night temperature variation of 9°C is moderate and manageable with a single mid-layer. Climate data: Open-Meteo ERA5 (1991–2020).

Sunshine Hours

The average number of hours per day with direct sunlight. Calculated from satellite measurements. Days with more than 7 hours of sunshine are ideal for outdoor activities. Under 3 hours means overcast conditions dominate.

UV Index

A scale from 0-11+ measuring ultraviolet radiation intensity. UV 0-2: Minimal risk. UV 3-5: Moderate -- wear sunscreen. UV 6-7: High -- hat and SPF 30+ essential. UV 8-10: Very High -- limit midday exposure. UV 11+: Extreme -- seek shade between 10am-4pm.

Rain Days

A rain day is counted when precipitation exceeds 0.1mm. This threshold captures even light drizzle. Unlike total rainfall in mm, rain days tells you how often you might need an umbrella, which is useful for planning outdoor activities.

Humidity

Relative humidity as a percentage. Below 40%: Dry -- skin and throat may feel parched. 40-60%: Comfortable -- ideal for most people. 60-80%: Sticky -- light, breathable fabrics recommended. Above 80%: Muggy -- heat feels more intense; quick-dry clothing is essential.

Frequently Asked Questions: Boston in July

In July, Boston experiences average highs of 28°C (82°F) and lows of 19°C (66°F). Expect around 10 rainy days and 12 hours of sunshine per day, with humidity averaging 65%. The 9°C gap between daytime and overnight temperatures is worth planning around: light layers work for most visitors during the day, but an overshirt or cardigan handles the cooler evenings. UV index averages 9, so sun protection is advisable on clear days.

Boston typically sees 10 rainy days in July, with total precipitation of around 74mm. Rain is moderate and manageable. Showers tend to pass quickly, and a light rain layer or foldable umbrella is sufficient protection for most days. For context, the driest month in Boston typically sees 4-6 fewer rain days than July.

Pack light layers, a light jacket for evenings, comfortable walking shoes, and sunscreen for Boston in July. Daytime temperatures of 28°C are pleasant, but the evening drop to 19°C means a jacket is essential if you plan to be out after dark. With 10 rainy days, bring a compact umbrella or waterproof jacket for unexpected showers. Comfortable walking shoes are a priority given the amount of ground most visitors cover.

Yes, July is an excellent time to visit Boston. With 12 daily sunshine hours and only 10 rainy days, conditions are ideal for sightseeing and outdoor activities. Temperatures averaging 28°C during the day are comfortable for long walks and outdoor dining. This is peak travel season, so booking accommodation in advance and arriving at popular attractions early in the morning helps avoid the busiest periods.

The average high temperature in Boston in July is 28°C (82°F), and the average low is 19°C (66°F). The mean daily temperature is approximately 24°C (74°F). The day-to-night range of 9°C is moderate, meaning a single light jacket covers most situations. These are 30-year climate normals based on the 1991 to 2020 reference period; individual years will vary, particularly in transitional months like spring and autumn.

The best month to visit Boston is generally July. July offers the most sunshine at 12 hours per day and only 10 rainy days. Average temperatures reach 28°C, making it comfortable for sightseeing, outdoor dining, and exploring the city. If your travel dates are flexible, planning your trip around July gives you the best chance of dry, bright weather.

July is shoulder or low season in Boston, meaning fewer tourists and generally lower prices than peak months. With 12 sunshine hours and 10 rainy days, the weather is less of a draw for mass tourism. This is an advantage for travellers who prefer a quieter, more relaxed experience with shorter queues and easier accommodation availability.

In July, Boston suits a range of activities thanks to mild temperatures around 28°C. Mix of indoor and outdoor activities works well given the moderate chance of rain. Top options include exploring historic neighbourhoods, visiting museums and galleries, local food markets, and day trips to surrounding areas. With 12 hours of sunshine, parks and waterfront walks are particularly enjoyable.

July ranks 1st sunniest of the year in Boston, with an average 12 daily sunshine hours. The driest months are September, February, and August. July is the hottest month (28°C avg high); January is the coolest (2°C). From here, temperatures fall 1°C into August. Compared to last month (June: 25°C high, 10 rain days), July is warmer and equally dry. July is among the top three sunniest months to visit Boston.

Year-Round Climate

Month	High	Low	Rain Days	Sun	Details
January	2°C	-6°C	10	6h	View
February	3°C	-6°C	9	7h	View
March	7°C	-2°C	11	8h	View
April	14°C	4°C	11	9h	View
May	19°C	10°C	11	10h	View
June	25°C	15°C	10	11h	View
July	28°C	19°C	10	12h	View
August	27°C	18°C	9	11h	View
September	23°C	15°C	8	9h	View
October	16°C	9°C	10	8h	View
November	10°C	3°C	10	6h	View
December	5°C	-2°C	11	6h	View

Other Months in Boston

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec

Plan Your Trip to Boston

Best Time to Visit Boston Boston vs New York in July Boston vs Montreal in July

Nearby Destinations with Similar Weather

These cities are within 500 km and experience broadly comparable weather conditions during the same calendar month, making them practical standalone alternatives or worthwhile additions to a longer regional itinerary.

New York🇺🇸 United States306 km away

29°C20°C low

Montreal🇨🇦 Canada403 km away

22°C10°C low

Quebec City🇨🇦 Canada495 km away

24°C16°C low

Data Sources for Boston

Boston on Wikipedia Open-Meteo Climate API NOAA National Centers UK Met Office WMO GeoNames

Climate normals represent 30-year averages (1991-2020). Individual years may vary.