Hyannis, Cape Cod weather in April
Temperature, sea and sunshine in April: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in April
Poor
Best time to visit: July – August
What is the weather like in Hyannis, Cape Cod in April?
In April, Hyannis, Cape Cod is cold: daytime highs average 10 °C, and nights cool down to about 6 °C. The sea averages 6.8 °C – swimming is only for the hardy. The sun shines for around 7 hours a day. Rain is frequent, with about 11 rainy days and 98 mm in total. All in all, April is not an ideal month for a holiday in Hyannis, Cape Cod.
April compared
How the weather changes from March to May. Tap a month to open it.
More details for April
- Daylight
- 13 h 17 min06:03 – 19:20
- UV index
- 7 · highclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 27 km/haverage daily peakAll months
- Cloud cover
- 60 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 1 day1 cm or more of fresh snowAll months
- Time zone
- UTC−4America/New_York
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %60 %
- Few rainy daysweight 20 %50 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in April
- Sunscreen
- Sunglasses & sun hat
- Warm jacket
- Rain jacket or umbrella
Hyannis, Cape Cod in April: quick answers
Is Hyannis, Cape Cod hot in April?
No. In April, Hyannis, Cape Cod is cold: daytime highs average 10 °C and nights drop to about 6 °C.
Can you swim in Hyannis, Cape Cod in April?
Only if you don't mind cold water: in April the sea averages just 6.8 °C. Comfortable swimming is possible in August.
Does it rain much in Hyannis, Cape Cod in April?
Rain is frequent, with about 11 rainy days and 98 mm in total.
Hyannis, Cape Cod month by month
The whole year in Hyannis, Cape CodAll destinations: USAWhere to go in AprilSea temperature in April
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