About Lightning in Montana
Located at approximately 47°N latitude, Montana is Big Sky Country where the Rocky Mountain front creates a sharp boundary between mountain weather and plains storms, producing dramatic summer thunderstorms visible for miles. Thunderstorm frequency varies within state boundaries, so this page does not publish an unsupported statewide annual average or national rank.
In Montana, afternoon solar heating of mountain slopes drives rapid orographic thunderstorm development. Peak thunderstorm activity occurs during June through August, when conditions align for the most frequent lightning strikes. With a population of 1.1 million residents, storm awareness and lightning safety are important considerations for anyone living in or visiting Montana.