From 1905 to 1923, Glacier National Park lost 30% of its ice and was forecast to be ice-free by 1938 unless temperatures cooled down.
29 Dec 1923, Page 5 – at Newspapers.com
12 Apr 1924, 7 – Spokane Chronicle at Newspapers.com
The glaciers are still there, which means the rate of melting must have slowed considerably. Yet NOAA shows 1905 to 1923 as being among the coldest years on record in Montana.
Climate at a Glance | National Centers for Environmental Information (NCEI)
NOAA cools the 1910s in Montana by 2.5 degrees, and warms recent years by on degree.