Weather in January
Ocean temperature
In January, the average ocean temperature in Mystic Island, New Jersey, is 43.3°F (6.3°C).Note: Being in 43.3°F (6.3°C) waters at 55.4°F (13°C) is discomforting, but anything below 50°F (10°C) can jeopardize breathing and induce cold shock, factoring in physical endurance.
Daylight
The average length of the day in January is 9h and 45min.On the first day of the month, sunrise is at 7:17 am and sunset at 4:43 pm. On the last day of January, sunrise is at 7:06 am and sunset at 5:15 pm EST.
Updated: Aug 29, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the water temperature in January?
In January, the average ocean temperature is 43.3°F (6.3°C). Swimming in 43.3°F (6.3°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.
What is the average length of the day in January?
The average day length in January is 9h and 45min.
When is the sunrise / sunset in January?
In January, on the first day of the month, sunrise is at 7:17 am and sunset at 4:43 pm. On the last day of the month, sunrise is at 7:06 am and sunset at 5:15 pm EST.
Average sea temperature in January
Mystic Island, NJ
- Average sea temperature in January: 43.3°F
The best month for swimming (with the highest average sea temperature) is August (75.8°F).
The coldest month (with the lowest average sea temperature) is February (40.8°F).
Average daylight in January
Mystic Island, NJ
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 24min).
Mystic Island, New Jersey, USA
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