SeasonMapHyannis (Cape Cod) weather in January
United States
January in Hyannis: cold, rainy, with clean air — one of the weakest months to visit.
#11 of 12 months in Hyannis · #1268 of 1383 destinations to visit in January · comfort 37/100 (tier F)
Updated September 2026 · climate normals from ERA5 reanalysis
Traveller notes on Hyannis in January
No notes yet. Open Hyannis on the map to add the first one.
Hyannis climate normals — January
| Daytime high | 5°C / 40°F | 🧥 cold |
|---|---|---|
| Nighttime low | 0°C / 32°F | |
| Sea temperature | 5°C / 41°F | 🥶 cold sea |
| Rainfall | 116 mm / 4.5 in | 🌧 rainy |
| Rainy days | 12 days | |
| Humidity | 75% | 💦 very humid |
| Dew point | -2°C / 29°F | |
| Sunshine | 5.7 h/day | |
| Daylight | 9.6 h | |
| Wind | 28 km/h / 17 mph | |
| Snowfall | 16.7 cm / 6.6 in | |
| Air quality (US AQI) | 35 | 🍃 good |
Monthly averages from ERA5 reanalysis. AQI is the mean US Air Quality Index for the month.
Crowds in Hyannis in January
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.
BusyWinter / Christmas 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).
Toughest weatherHyannis's weather peaks July–September, best around August.
Best weatherFair weatherToughest weather
What's on in Hyannis in January
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 January — FAQ
- Is January a good time to visit Hyannis?
- January in Hyannis: cold, rainy, with clean air — one of the weakest months to visit. It ranks #11 of 12 months for Hyannis on SeasonMap's comfort score (37/100).
- What is the weather like in Hyannis in January?
- In January, Hyannis averages a daily high of 4.7°C and a low of -0.1°C, with about 115.5 mm of rain over roughly 11.6 rainy days.
- What is the air quality in Hyannis in January?
- Hyannis has a mean US Air Quality Index of about 35 in January.
- Does it snow in Hyannis in January?
- Hyannis sees roughly 16.7 cm of snowfall in January.
Other months in Hyannis
Compare Hyannis in January
Warmer or cooler than Hyannis in January
Similar destinations in North America — January
Within 300 km: Boston's First Night on 31 Dec – 1 Jan, and Newport's Christmas at the mansions on 20 Nov – 2 Jan.