The climate of Kemi is cold continental, with freezing winters and mild summers.
The city is located in central-northern Finland, in the northernmost part of the Gulf of Bothnia (known as Perämeri) which can freeze in winter. The white nights, when the sun sets but it is not completely dark even at midnight, occur from April 23 to August 21.
The average temperature of the coldest month (January) is of -11.2 °C (12 °F), that of the warmest month (July) is of 15.5 °C (60 °F). Here are the average temperatures.
Kemi - Average temperatures
Min (°C)-16-15-11-4271194-1-7-13
Max (°C)-7-6-2411172018125-1-5
Min (°F)351225364552483930199
Max (°F)192128395263686454413023

Precipitation amounts to 585 millimeters (23 inches) per year: so, it is at an intermediate level. It ranges from 30 mm (1.2 in) in the driest month (April) to 70 mm (2.8 in) in the wettest (July). Here is the average precipitation.
Kemi - Average precipitation

The sea temperature ranges between -1 °C (30 °F) and 15 °C (59 °F). So, it is cold all year round. It is useful to recall that sea water freezes at about -2 °C (28.5 °F). Here are the average sea temperatures.
Kemi - Sea temperature
Temp (°C)10-1038131512852
Temp (°F)343230323746555954464136


Best Time

The best time to visit Kemi is the summer, from June to August, since it is the mildest season. However, you must take into account some rainy days and a bit of cold at night.