FPUS65 KTFX 190631 SFTTFX MTZ301>330-201100- Tabular State Forecast for North Central and Southwest Montana National Weather Service Great Falls MT 1231 AM MDT Tue May 19 2026 ROWS INCLUDE... Daily predominant daytime weather 6AM-6PM Forecast temperatures...early morning low/daytime high Probability of precipitation nighttime 6PM-6AM/daytime 6AM-6PM - indicates temperatures below zero MM indicates missing data FCST FCST FCST FCST FCST FCST FCST Wed Thu Fri Sat Sun Mon Tue May 20 May 21 May 22 May 23 May 24 May 25 May 26 ...CENTRAL MONTANA... Great Falls Tstrms Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 40/58 38/63 40/70 44/76 48/78 51/78 48/72 20/80 70/20 00/00 00/10 00/00 00/10 20/20 Cut Bank Rain Ptcldy Ptcldy Sunny Ptcldy Ptcldy Ptcldy 38/55 34/63 39/69 42/73 44/74 46/72 42/68 10/80 40/00 00/10 00/10 00/00 00/10 30/20 Havre Rain Ptcldy Sunny Sunny Sunny Ptcldy Ptcldy 40/62 36/66 38/73 43/79 46/79 49/81 47/75 30/50 10/10 00/00 00/00 10/10 00/00 10/10 Helena Shwrs Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 38/64 38/63 39/71 41/76 44/78 46/78 44/72 20/60 90/40 00/10 00/00 00/00 00/10 10/20 Lewistown Tstrms Rain Ptcldy Sunny Sunny Ptcldy Ptcldy 36/58 35/57 35/66 40/72 43/74 45/77 44/70 20/80 80/50 00/10 00/10 10/00 00/10 10/20 Shelby Rain Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 39/57 36/65 39/71 43/76 45/77 47/76 44/70 10/60 40/00 00/10 00/10 10/00 00/10 20/20 Chester Rain Ptcldy Sunny Sunny Sunny Ptcldy Ptcldy 38/59 35/65 38/71 41/77 43/78 46/78 44/72 30/60 20/00 00/00 00/10 10/10 00/10 20/10 Chinook Rain Ptcldy Sunny Sunny Sunny Ptcldy Ptcldy 40/63 38/66 39/73 43/79 46/80 48/82 47/76 20/60 10/10 00/00 00/00 10/00 00/10 10/10 Conrad Rain Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 39/56 35/64 39/71 42/76 45/77 47/76 44/71 10/80 50/00 00/10 00/10 00/00 00/10 30/20 Choteau Tstrms Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 38/55 35/63 39/70 43/75 45/77 48/76 44/70 20/90 70/10 00/10 00/00 00/00 00/10 30/20 Fort Benton Rain Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 42/62 39/66 40/74 44/80 47/81 49/81 48/75 20/80 40/20 00/00 00/00 10/00 00/10 10/10 Stanford Tstrms Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 38/57 37/58 37/66 42/72 47/74 49/76 47/69 20/90 80/40 00/10 00/10 00/00 00/10 10/20 White Sulphur Springs Shwrs Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 34/58 34/57 34/65 38/71 41/74 44/75 42/69 20/50 80/30 00/10 00/10 00/00 00/10 10/20 ...SOUTHWEST MONTANA... Bozeman Airport Ptcldy Rain Sunny Sunny Sunny Sunny Ptcldy 34/63 35/58 33/68 39/76 42/78 45/80 43/73 20/40 90/60 00/00 00/00 10/00 00/10 10/30 Bozeman MSU Ptcldy Rnsnow Ptcldy Sunny Sunny Sunny Ptcldy 36/61 36/56 35/67 41/74 44/77 47/79 45/72 20/40 100/70 00/00 00/00 10/00 00/10 10/30 West Yellowstone Mocldy Ptcldy Ptcldy Sunny Sunny Sunny Sunny 26/57 30/55 26/62 30/69 34/74 36/75 36/69 10/40 80/40 00/20 00/10 10/10 00/10 10/20 Dillon Ptcldy Ptcldy Sunny Sunny Sunny Ptcldy Sunny 34/62 35/60 35/68 39/75 41/78 44/79 41/72 20/20 70/40 00/00 00/00 00/00 00/10 10/10 Boulder Rain Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 36/60 37/60 38/68 41/73 44/76 46/75 44/69 20/60 90/40 00/10 00/10 00/10 00/10 10/20 Townsend Shwrs Ptcldy Ptcldy Sunny Sunny Sunny Ptcldy 40/62 40/62 40/69 44/75 46/78 49/79 46/72 30/50 80/20 00/10 00/10 10/00 00/10 10/20 Virginia City Ptcldy Rnsnow Ptcldy Sunny Sunny Sunny Ptcldy 34/55 36/52 35/61 40/66 43/70 47/71 44/64 20/30 90/60 00/10 00/10 10/00 00/10 10/30 $$ http://www.weather.gov/greatfalls