Based on the Köppen climate classification, Granite Peak is located in a subarctic climate zone with long, cold, snowy winters, and mild summers.[6] Temperatures can drop below −20 °C with wind chill factors below −30 °C. The months May through June offer the most favorable weather for climbing or viewing. Precipitation runoff from the mountain drains into Eska and Granite Creeks, both of which are tributaries of the Matanuska River.
^Dictionary of Alaska Place Names, Donald J. Orth author, United States Government Printing Office (1967), page 385
^James Kari and James A. Fall, Shem Pete's Alaska, 2nd Ed. 2003.
^Peel, M. C.; Finlayson, B. L.; McMahon, T. A. (2007). "Updated world map of the Köppen−Geiger climate classification". Hydrol. Earth Syst. Sci. 11. ISSN1027-5606.