If you're looking for summer vibes, the best time to travel to Geilenkirchen is in July, August and June, when the average temperature reaches 22.33 °C, while July, May and June are the 3 sunniest months of the year, with an average of 89.15 hours.
If you prefer colder temperatures, however, make sure you visit Geilenkirchen during the months of January, February and March to experience an average of 0.72 °C.
For those who don't care too much about temperatures, but want to avoid getting wet in the rain, it's important to avoid travelling during January, March and February, when the average precipitation in Geilenkirchen is 10.5 mm, while the months of January, February and March are drier, with an average of 0 mm.