Hyannis, Cape Cod weather in June
Temperature, sea and sunshine in June: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in June
Poor
Best time to visit: July – August
What is the weather like in Hyannis, Cape Cod in June?
In June, Hyannis, Cape Cod is mild: daytime highs average 19 °C, and nights cool down to about 16 °C. The sea averages 15.7 °C – swimming is only for the hardy. The sun shines for around 8 hours a day. Rain is frequent, with about 9 rainy days and 77 mm in total. All in all, June is not an ideal month for a holiday in Hyannis, Cape Cod.
June compared
How the weather changes from May to July. Tap a month to open it.
More details for June
- Daylight
- 15 h 11 min05:06 – 20:16
- UV index
- 9 · very highclear sky, noon (estimate)All months
- Muggy days
- 4 daysdew point 18 °C or moreAll months
- Wind
- 22 km/haverage daily peakAll months
- Cloud cover
- 61 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 0 days1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 35 %7 %
- Seaweight 25 %0 %
- Sunshineweight 20 %82 %
- Few rainy daysweight 20 %64 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in June
- Sunscreen
- Sunglasses & sun hat
- A jumper for the evenings
- Rain jacket or umbrella
Hyannis, Cape Cod in June: quick answers
Is Hyannis, Cape Cod hot in June?
No. In June, Hyannis, Cape Cod is mild: daytime highs average 19 °C and nights drop to about 16 °C.
Can you swim in Hyannis, Cape Cod in June?
Only if you don't mind cold water: in June the sea averages just 15.7 °C. Comfortable swimming is possible in August.
Does it rain much in Hyannis, Cape Cod in June?
Rain is frequent, with about 9 rainy days and 77 mm in total.
Hyannis, Cape Cod month by month
The whole year in Hyannis, Cape CodAll destinations: USAWhere to go in JuneSea temperature in June
Climate averages 1996–2025, not a forecast. Data: Copernicus ERA5 / ERA5-Land via Open-Meteo.com (CC BY 4.0), NOAA OISST, WMO 1991–2020 (NOAA NCEI), GeoNames (CC BY 4.0). Sources & licences