The community is located along U.S. Route 191 in northeastern Fergus County, 35 miles (56 km) northeast of Lewistown. Roy has a post office with the ZIP code 59471.[4] As of the census[5] of 2010, there were 108 people.
The post office opened in 1892. The Milwaukee Land Company platted the townsite in 1913.[6]
Climate
Roy has a semi-arid climate (KöppenBSk) with cold winters except when moderated by chinook influences that will typically push maximum temperatures over 50 °F or 10 °C on seventeen days during winter and twelve days each in November and March. Spring is mild and frequently thundery, whilst summer days are hot – sometimes very hot – but nights are usually pleasantly cool.
Precipitation is fairly scarce, mostly coming from thunderstorms during late spring and summer, whilst snowfall averages 43 inches or 1.09 metres (the median is 30.9 inches or 0.78 metres) but significant falls occur on only a minority of winter days. However, during the cold winter of 1977–78, cover reached 56 inches or 1.42 metres on February 19 and averaged 46 inches or 1.17 metres for the whole month of February.
Climate data for Roy 8 NE, Montana (1971–2000; extremes 1948−2001)
