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

December weather forecast and climate
Lake Bluff, IL

Ocean temperature

In Lake Bluff, Illinois, the average seawater temperature in December is 41.7°F (5.4°C).
Note: Swimming in 41.7°F (5.4°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

Daylight

The month with the shortest days in Lake Bluff, Illinois, is December, with an average of 9.1h of daylight.

What is the water temperature in December in Lake Bluff?

In December, the average ocean temperature in Lake Bluff, Illinois, is 41.7°F (5.4°C). Swimming in 41.7°F (5.4°C) is considered dangerous. Unprotected immersion in temperatures below 50°F (10°C) causes quickly maximum intensity cold shock with hyperventilation.

What is the month with the shortest days in Lake Bluff?

With an average of 9.1h of daylight, December has the shortest days of the year in Lake Bluff, Illinois.

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

In Lake Bluff, the average length of the day in December is 9.1h.
Average sea temperature in December - Lake Bluff, IL
  • Average sea temperature in December: 41.7°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 December - Lake Bluff, IL
  • Average daylight in December: 9.1h

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