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

April weather forecast and climate
Lake Bluff, IL

Ocean temperature

In April, the average ocean temperature in Lake Bluff, Illinois, is 40.3°F (4.6°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

In Lake Bluff, the average length of the day in April is 13.4h.

What is the water temperature in April in Lake Bluff?

In April, the average ocean temperature in Lake Bluff, Illinois, is 40.3°F (4.6°C). 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.

What is the average length of the day in April in Lake Bluff?

The average length of the day in April is 13.4h.
Average sea temperature in April - Lake Bluff, IL
  • Average sea temperature in April: 40.2°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 April - Lake Bluff, IL
  • Average daylight in April: 13.4h

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