Based on the Köppen climate classification, Highbush Peak is located in a subarctic climate zone with long, cold, snowy winters, and mild summers. Temperatures can drop below −20 °C with wind chill factors below −30 °C. This climate supports a small unnamed glacier on its east slope.
Nagoon Mountain, Lingon Mountain, and Highbush Peak from upper Winner Creek trail
^Peel, M. C.; Finlayson, B. L.; McMahon, T. A. (2007). "Updated world map of the Köppen−Geiger climate classification". Hydrol. Earth Syst. Sci. 11: 1633–1644. ISSN1027-5606.