Kalajoki
Finland
Long-term weather forecast
Long-term weather forecast

September weather forecast and climate
Kalajoki, Finland

Sea temperature

In September, the average sea temperature in Kalajoki, Finland, is 12.4°C (54.3°F).
Note: Swimming in 12.4°C (54.3°F) is considered life-threatening. Even a few minutes in 13°C (55.4°F) water is uncomfortable, and swimming below 10°C (50°F) may cause total loss of breathing control and cold shock, depending on a person's physique.

Daylight

In Kalajoki, Finland, the average length of the day in September is 13h.

What is the water temperature in September in Kalajoki?

In September, the average sea temperature in Kalajoki, Finland, is 12.4°C (54.3°F). Swimming in 12.4°C (54.3°F) is considered dangerous. Unprotected immersion in temperatures below 10°C (50°F) causes quickly maximum intensity cold shock with hyperventilation.

How many hours of daylight does Kalajoki have in September?

In September, the average length of the day is 13h.
Average sea temperature in September - Kalajoki, Finland
  • Average sea temperature in September: 12.4°C

The best month for swimming (with the highest average sea temperature) is August (16.3°C).
The coldest month (with the lowest average sea temperature) is April (-0.3°C).

Average daylight in September - Kalajoki, Finland
  • Average daylight in September: 13h

The month with the longest days is June (Average daylight: 21h).
The month with shortest days is December (Average daylight: 4.3h).