Hyannis, Cape Cod weather in October
Temperature, sea and sunshine in October: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in October
Poor
Best time to visit: July – August
What is the weather like in Hyannis, Cape Cod in October?
In October, Hyannis, Cape Cod is cool: daytime highs average 16 °C, and nights cool down to about 12 °C. The sea averages 15.4 °C – swimming is only for the hardy. Expect around 5 hours of sunshine a day. Rain is frequent, with about 9 rainy days and 113 mm in total. All in all, October is not an ideal month for a holiday in Hyannis, Cape Cod.
October compared
How the weather changes from September to November. Tap a month to open it.
| SeptemberSep | OctoberOct | NovemberNov | |
|---|---|---|---|
| Score | 40 | 20 | 18 |
| Day | 20° | 16° | 11° |
| Night | 17° | 12° | 6° |
| Sea | 19° | 15° | 11° |
| Sun | 6 h | 5 h | 5 h |
| Rain days | 9 | 9 | 9 |
More details for October
- Daylight
- 11 h 10 min06:52 – 18:02
- UV index
- 4 · moderateclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 26 km/haverage daily peakAll months
- Cloud cover
- 53 %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 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %40 %
- Few rainy daysweight 20 %61 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in October
- Sunscreen
- A jumper for the evenings
- Rain jacket or umbrella
Hyannis, Cape Cod in October: quick answers
Is Hyannis, Cape Cod hot in October?
No. In October, Hyannis, Cape Cod is cool: daytime highs average 16 °C and nights drop to about 12 °C.
Can you swim in Hyannis, Cape Cod in October?
Only if you don't mind cold water: in October the sea averages just 15.4 °C. Comfortable swimming is possible in August.
Does it rain much in Hyannis, Cape Cod in October?
Rain is frequent, with about 9 rainy days and 113 mm in total.
Hyannis, Cape Cod month by month
The whole year in Hyannis, Cape CodAll destinations: USAWhere to go in OctoberSea temperature in October
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