Complex sentence: Average air temperatures range from 15 ° C in July to 6 ° C in January, while the soil temperature does not usually drop below 6 ° C (as an exception, in late 2010, there was a prolonged period of snow).
Split into simpler sentences: Average air temperatures range from 15 ° C in July to 6 ° C in January. The soil temperature does not usually drop below 6 ° C (end 2010 recorded a very unusual prolonged period of snow).