Shelby, Montana experiences a continental climate with cold winters and warm summers. The average high temperature in January is around 28°F (-2°C), while in July, it reaches about 80°F (27°C). The area receives moderate precipitation throughout the year, with an average annual rainfall of around 14 inches (36 cm). Winter months can bring heavy snowfall, making it important for residents to be prepared for winter weather conditions.
The climate in Shelby is classified as semi-arid continental. Summers are warm with temperatures ranging from 75°F to 90°F, while winters can be cold with temperatures dropping to 0°F to 20°F. The area receives moderate precipitation, with rainfall averaging around 12 inches per year and snowfall averaging around 40 inches per year.