SeasonMapHyannis (Cape Cod) weather in June
United States
June in Hyannis: warm, a little rain, with muggy air — an excellent time to visit.
#3 of 12 months in Hyannis · #705 of 1383 destinations to visit in June · comfort 81/100 (tier A)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Hyannis in June
No notes yet. Open Hyannis on the map to add the first one.
Hyannis climate normals — June
| Daytime high | 23°C / 74°F | 🌤 warm |
|---|---|---|
| Nighttime low | 15°C / 58°F | |
| Feels like (high) | 24°C / 75°F | |
| Sea temperature | 18°C / 65°F | 🧊 bracing |
| Rainfall | 71 mm / 2.8 in | 🌦 some rain |
| Rainy days | 7 days | |
| Humidity | 82% | 💦 very humid |
| Dew point | 14°C / 58°F | |
| Sunshine | 11.1 h/day | |
| Daylight | 15.1 h | |
| Wind | 22 km/h / 14 mph | |
| Air quality (US AQI) | 54 | 🙂 moderate |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Hyannis in June
How busy the place itself is — school and mass holidays, the months an editor tagged, and how sought-after the weather makes them. Never part of the comfort score.
Peak crowdsIsland ferry high season, Summer break in United States, school holidays in 2 of the markets that fill it(estimated)
Peak crowdsBusyShoulder seasonQuiet
Best months for Hyannis's weather
Ranked by this destination's own climate comfort score across the year — a different thing from how busy it gets (see Crowds above).
Best weatherHyannis's weather peaks June–August, best around July.
June includes White shark season.
Best weatherFair weatherToughest weather
What's on in Hyannis in June
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Opening
Island ferry high season
20 May – 15 Oct · usuallySummer season opensCrowdedBook earlyHyannis is the mainland end of the Nantucket boats, and the summer timetable adds fast ferries and extra sailings from late May. Car spaces on the traditional boat are released months ahead and go the day they open. Source ↗
- Nature
White shark season
1 Jun – 31 Oct · usuallyWildlife seasonRiskWhite sharks follow the grey seals into Cape waters from early summer and are gone by late autumn, with the tagged detections peaking in August and September. It is the ocean side that closes for sightings, not the calmer Nantucket Sound beaches in town. Source ↗
Nearby, and something's on
Within 300 km of Hyannis — a day trip or a short hop — with something on this month. Never part of the comfort score.
Where is Hyannis?
Hyannis in June — FAQ
- Is June a good time to visit Hyannis?
- June in Hyannis: warm, a little rain, with muggy air — an excellent time to visit. It ranks #3 of 12 months for Hyannis on SeasonMap's comfort score (81/100).
- What is the weather like in Hyannis in June?
- In June, Hyannis averages a daily high of 23.2°C and a low of 14.6°C, with about 71 mm of rain over roughly 6.9 rainy days.
- What is the air quality in Hyannis in June?
- Hyannis has a mean US Air Quality Index of about 54 in June.
Other months in Hyannis
Compare Hyannis in June
Warmer or cooler than Hyannis in June
Similar destinations in North America — June
Within 300 km: Boston's Whales on Stellwagen Bank around 15 Apr – 20 Oct, and Nantucket's Nantucket Film Festival around 20 Jun – 1 Jul.