SeasonMapHyannis (Cape Cod) weather in April
United States
April in Hyannis: cool, rainy, with clean air — a good time to visit.
#7 of 12 months in Hyannis · #1254 of 1383 destinations to visit in April · comfort 60/100 (tier C)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Hyannis in April
Notes from nearby Boston (101 km away)
Hyannis doesn't have its own notes for April yet — these are about Boston, close enough to share the season.
Locals refuse to give April a number, and they're right to. "April is a huge transition month here and it could be snowing or 85°F." Another puts the range at "the 40s or the 90s, sunny or cloudy or rain, but not usually snow" — the two posters don't even agree on whether snow is on the table, which is itself the answer. The practical advice that follows is unusually specific: "if you come on April 12th, don't pack until you check the weather on April 11th. Really." Layers, a rain jacket, a hood or hat, and warm things underneath. Our record gives April 13.4°C days and 4.7°C nights with 1.9cm of snow still on the books, plus 22.6 kph average wind — but an average is exactly the wrong tool for this month, and the forum knows it.
Add your own note from Hyannis's card on the map.
Hyannis climate normals — April
| Daytime high | 11°C / 51°F | 🙂 cool |
|---|---|---|
| Nighttime low | 6°C / 43°F | |
| Sea temperature | 10°C / 50°F | 🥶 cold sea |
| Rainfall | 94 mm / 3.7 in | 🌧 rainy |
| Rainy days | 11 days | |
| Humidity | 74% | 💧 humid |
| Dew point | 4°C / 40°F | |
| Sunshine | 8.6 h/day | |
| Daylight | 13.4 h | |
| Wind | 28 km/h / 17 mph | |
| Snowfall | 1 cm / 0.4 in | |
| Air quality (US AQI) | 44 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Hyannis in April
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.
Shoulder seasonan ordinary month(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).
Fair weatherHyannis's weather peaks July–September, best around August.
Best weatherFair weatherToughest weather
What's on in Hyannis in April
Recurring seasonal events, natural spectacles, closures and holidays — curated and sourced.
- Season
Winter shutdown
1 Nov – 15 AprOff-season shutdownClosuresMost of the seasonal restaurants and shops close and the ferry drops to the winter timetable, though Hyannis keeps more open year-round than the rest of the Cape because people actually live here. Rates halve.
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 April — FAQ
- Is April a good time to visit Hyannis?
- April in Hyannis: cool, rainy, with clean air — a good time to visit. It ranks #7 of 12 months for Hyannis on SeasonMap's comfort score (60/100).
- What is the weather like in Hyannis in April?
- In April, Hyannis averages a daily high of 10.5°C and a low of 6.3°C, with about 93.9 mm of rain over roughly 11.2 rainy days.
- What is the air quality in Hyannis in April?
- Hyannis has a mean US Air Quality Index of about 44 in April.
- Does it snow in Hyannis in April?
- Hyannis sees roughly 1 cm of snowfall in April.
Other months in Hyannis
Compare Hyannis in April
Warmer or cooler than Hyannis in April
Similar destinations in North America — April
Within 300 km: Nantucket's Daffodil Festival around 20 Apr – 2 May, and Boston's Boston Marathon around 14–21 Apr.