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. In Billings, during the entire year, snow falls for 64.5 days and aggregates up to 31.18" (792mm) of snow.
• Missoula - May »
  On the last day of the month, in Missoula sunrise is at 5:45 am and sunset at 9:22 pm MDT. In Missoula during May, the rain falls for 6.5 days and regularly aggregates up to 0.39" (10mm) of precipitation.
• Great Falls - May »
  In Great Falls during May, the rain falls for 9 days and regularly aggregates up to 0.63" (16mm) of precipitation. During 0.9 snowfall days, in May, Great Falls aggregates 0.31" (8mm) of snow.
• 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. 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.
• Butte - May »
  In Butte, during the entire year, snow falls for 103.1 days and aggregates up to 52.56" (1335mm) of snow. In Butte, during May, snow falls for 5.3 days and regularly aggregates up to 5" (127mm) of snow.
• Helena - May »
  During 1.3 snowfall days, in May, Helena aggregates 0.67" (17mm) of snow. During 1.3 snowfall days, in May, Helena aggregates 0.67" (17mm) of snow.
• Kalispell - May »
  During 0.9 snowfall days, in May, Kalispell aggregates 0.71" (18mm) of snow. During 0.9 snowfall days, in May, Kalispell aggregates 0.71" (18mm) of snow.
• Havre - May »
  Throughout the year, in Havre, there are 38.5 snowfall days, and 45.2" (1148mm) of snow is accumulated. During 0.4 snowfall days, in May, Havre aggregates 1.5" (38mm) of snow.
• Anaconda - May »
  In Anaconda, during the entire year, snow falls for 117.3 days and aggregates up to 65.47" (1663mm) of snow. In Anaconda, in May, snow falls for 6.1 days, with typically accumulated 3.5" (89mm) of snow.
• Miles City - May »
  May is the last month it regularly snows in Miles City, Montana. The advent of May in Miles City, Montana ushers in higher temperatures, clearer skies, and longer days.
• Belgrade - May »
  In Belgrade in May, snow falls for 2.6 days, with typically accumulated 1.18" (30mm) of snow. On the last day of the month, in Belgrade sunrise is at 5:38 am and sunset at 9:06 pm MDT.
• Livingston - May »
  The month with the most rainfall in Livingston is May, when 2.83" (72mm) of precipitation is typically aggregated. May is the month with the most rainfall in Livingston, with 2.83" (72mm) of accumulated precipitation.