May weather forecast
Montana, USA

May marks the arrival of late spring in Montana, bringing more consistent warmth and a noticeable decline in snowfall across most of the state. The varied geography continues to influence weather patterns, with milder temperatures in the western region and warmer but still variable conditions in the eastern part.

The minimum temperature in May typically ranges from 35°F (1.7°C) to 45°F (7.2°C), while the maximum temperature generally varies between 60°F (15.6°C) and 70°F (21.1°C). The increase in temperature heralds the onset of more stable spring weather, though sudden changes are still possible, particularly in the eastern region.

Snowfall becomes increasingly rare, confined mainly to the higher mountain ranges. Rain becomes more prevalent, reflecting the seasonal shift. Thunderstorms may also start to occur, particularly in the lowlands and prairies.

Compared to April, May sees a further consolidation of spring's influence, with longer days, increased sunshine, and a continuation of the warming trend. The contrast between the western and eastern parts of the state remains, though it becomes less pronounced as temperatures rise uniformly across Montana.

May in Montana is characterized by a blend of late spring warmth and lingering variability. The month serves as a precursor to summer, with steadily rising temperatures and a decline in winter's influence. Rain replaces snow in many areas, and the state's diverse geography continues to create a range of weather patterns. May's weather sets the stage for the approaching summer, with increased outdoor activities and a return of lush green landscapes.

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• Billings - May »
  The month with the most rainfall in Billings is May, when the rain falls for 17.6 days and typically aggregates up to 2.13" (54mm) of precipitation. On the last day of the month, in Billings sunrise is at 5:28 am and sunset at 8:55 pm MDT.
• Missoula - May »
  On the last day of the month, in Missoula, sunrise is at 5:45 am and sunset at 9:21 pm MDT. Throughout the year, in Missoula, there are 44 snowfall days, and 8.07" (205mm) of snow is accumulated.
• Great Falls - May »
  In Great Falls, Montana, in May, during 9 rainfall days, 0.63" (16mm) of precipitation is typically accumulated. On the first day of May in Great Falls sunrise is at 6:07 am and sunset at 8:36 pm.
• Bozeman - May »
  The month with the most rainfall in Bozeman is May, when the rain falls for 18.5 days and typically aggregates up to 2.83" (72mm) of precipitation. In Bozeman, during May, the rain falls for 18.5 days and regularly aggregates up to 2.83" (72mm) of precipitation.
• Butte - May »
  In Butte, during May, snow falls for 5.3 days and regularly aggregates up to 5" (127mm) of snow. In Butte, during the entire year, snow falls for 103.1 days and aggregates up to 52.56" (1335mm) of snow.
• Helena - May »
  In Helena in May, it is raining for 15.8 days, with typically 1.5" (38mm) of accumulated precipitation. During 1.3 snowfall days, in May, Helena aggregates 0.67" (17mm) of snow.
• Kalispell - May »
  On the last day of the month, in Kalispell sunrise is at 5:41 am and sunset at 9:28 pm MDT. During 0.9 snowfall days, in May, Kalispell aggregates 0.71" (18mm) of snow.
• Havre - May »
  During 0.4 snowfall days, in May, Havre aggregates 1.5" (38mm) of snow. In Havre, during May, the rain falls for 9.7 days and regularly aggregates up to 1.85" (47mm) of precipitation.
• Anaconda - May »
  In Anaconda, Montana, during May, the rain falls for 19.4 days and regularly aggregates up to 2.76" (70mm) of precipitation. In Anaconda, during the entire year, snow falls for 117.3 days and aggregates up to 65.47" (1663mm) of snow.
• Miles City - May »
  The month with the most rainfall in Miles City is May, when the rain falls for 11.3 days and typically aggregates up to 1.1" (28mm) of precipitation. Throughout the year, in Miles City there are 43.4 snowfall days, and 9.13" (232mm) of snow is accumulated.
• Belgrade - May »
  The month with the most rainfall in Belgrade is May, when the rain falls for 19.4 days and typically aggregates up to 2.2" (56mm) of precipitation. In Belgrade, during May, snow falls for 2.6 days and regularly aggregates up to 1.18" (30mm) of snow.
• Livingston - May »
  The month with the most rainfall in Livingston is May, when 2.83" (72mm) of precipitation is typically aggregated. On the first day of May in Livingston, sunrise is at 6:09 am and sunset at 8:29 pm.