Kajaani, where it's located

The climate of Kajaani is cold continental, with freezing winters and mild summers.
The city is located in central Finland, near Lake Oulujärvi, and is the capital of the Kainuu region. The white nights occur from April 28th to August 16th.
The average temperature of the coldest month (January) is of -11.2 °C (12 °F), that of the warmest month (July) is of 15.9 °C (61 °F). The cold record is -41 °C (-42 °F), the heat record is 31 °C (88 °F). Here are the average temperatures.
Kajaani - Average temperatures
Min (°C)-15-15-10-42811950-6-12
Max (°C)-7-6-1513182118125-1-5
Min (°F)5514253646524841322110
Max (°F)192130415564706454413023

Precipitation amounts to 555 millimeters (21.9 inches) per year: so, it is at an intermediate level. It ranges from 25 mm (1 in) in the driest months (February, April) to 75 mm (3 in) in the wettest ones (July, August). Here is the average precipitation.
Kajaani - Average precipitation


Best Time

The best time to visit Kajaani 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.