Lake Bluff
Illinois, USA
Long-term weather forecast
Long-term weather forecast

January weather forecast and climate
Lake Bluff, IL

Ocean temperature

In Lake Bluff, Illinois, the average seawater temperature in January is 38.8°F (3.8°C).
Note: For swimming, this is considered life-threatening and very dangerous. The water feels painfully cold, and hyperventilation quickly occurs. A specialized swimsuit is mandatory to reduce thermal damage.

Daylight

The average length of the day in January in Lake Bluff is 9.5h.

How cold is the water in January in Lake Bluff?

In January, the average ocean temperature in Lake Bluff, Illinois, is 38.8°F (3.8°C). For swimming, this is considered extremely cold, dangerous, and life-threatening. Unless suitably protected with insulated waterproof clothing, hypothermia quickly occurs.

How many hours of daylight does Lake Bluff have in January?

The average length of the day in January is 9.5h.
Average sea temperature in January - Lake Bluff, IL
  • Average sea temperature in January: 38.8°F

The best month for swimming (with the highest average sea temperature) is August (73.3°F).
The coldest month (with the lowest average sea temperature) is February (37.1°F).

Average daylight in January - Lake Bluff, IL
  • Average daylight in January: 9.5h

The month with the longest days is June (Average daylight: 15.2h).
The month with shortest days is December (Average daylight: 9.1h).