HIGH STORM RISK  — Longmont sits in a cold semi-arid climate at the Colorado Front Range with 32.2 inches of average annual snowfall and 15.21 inches of total precipitation. The record high reached 106 F on July 7, 1973, and again on June 27, 1994, while the record low plunged to -38 F on January 16, 1930. Temperature swings of that magnitude drive severe expansion-contraction cycling in shingles and sealants. Front Range storms regularly produce large hail from late spring through summer, stripping granules and denting metal panels. Heavy snowpack loads test low-pitch roof structures each winter, and UV intensity at elevation accelerates membrane degradation faster than at sea level.