Nantucket weather in January
Temperature, sea and sunshine in January: long-term averages from 30 years of weather data, not a forecast.
Holiday weather in January
Poor
Best time to visit: July – August
What is the weather like in Nantucket in January?
In January, Nantucket is cold: daytime highs average 4 °C, and nights cool down to about 0 °C. The sea averages 4.7 °C – swimming is only for the hardy. The sun is scarce, with only about 4 hours a day. Rain is frequent, with about 12 rainy days and 117 mm in total. Snow falls on about 3 days. It is often windy, with gusts of around 43 km/h. All in all, January is not an ideal month for a holiday in Nantucket.
January compared
How the weather changes from December to February. Tap a month to open it.
| DecemberDec | JanuaryJan | FebruaryFeb | |
|---|---|---|---|
| Score | 10 | 11 | 15 |
| Day | 8° | 4° | 4° |
| Night | 4° | 0° | 0° |
| Sea | 7° | 5° | 3° |
| Sun | 4 h | 4 h | 5 h |
| Rain days | 12 | 12 | 11 |
More details for January
- Daylight
- 9 h 30 min07:04 – 16:34
- UV index
- 2 · lowclear sky, noon (estimate)All months
- Muggy days
- 0 daysdew point 18 °C or moreAll months
- Wind
- 43 km/haverage daily peakAll months
- Cloud cover
- 69 %on averageAll months
- Hot days
- 0 days30 °C or moreAll months
- Snow days
- 3 days1 cm or more of fresh snowAll months
- Time zone
- UTC−5America/New_York
How the score comes together
- Temperatureweight 35 %0 %
- Seaweight 25 %0 %
- Sunshineweight 20 %13 %
- Few rainy daysweight 20 %40 %
Each factor is rated from 0 to 100 % and weighted for the travel style “Sun, sea & sand”.
What to pack in January
- Warm jacket
- Hat, scarf & gloves
- Rain jacket or umbrella
- Windproof jacket
Nantucket in January: quick answers
Is Nantucket hot in January?
No. In January, Nantucket is cold: daytime highs average 4 °C and nights drop to about 0 °C.
Can you swim in Nantucket in January?
Only if you don't mind cold water: in January the sea averages just 4.7 °C. Comfortable swimming is possible in August.
Does it rain much in Nantucket in January?
Rain is frequent, with about 12 rainy days and 117 mm in total.
Nantucket month by month
The whole year in NantucketAll destinations: USAWhere to go in JanuarySea temperature in January
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