May to August
Most of Mjølkevegen goes through mountainous areas so expect to see snow in this area until late in April and in some years even into late May. Roads will, however, be plowed so you can safely go biking from the start of May.
The prime months for biking Mjølkevegen is July and August. You will have daylight most of the day and temperatures are at its highest during this time of the year, ranging from 5 to 20 degrees Celsius. In peak summertime, the sun is only gone for 4 hours during the night and it never gets totally dark so you can basically bike throughout the whole day.
September to October
Biking Mjølkevegen in September and October is possible, but make sure you check the weather and road conditions before you go. In this period you could get very nice days with temperatures ranging from 5 to 10 degrees Celsius, but you are also very likely to see days with snow and sub-zero temperatures.
November to April
Mjølkevegen will be closed during this period due to snow.