FPUS65 KTFX 192136 SFTTFX MTZ301>330-201100- Tabular State Forecast for North Central and Southwest Montana National Weather Service Great Falls MT 336 PM 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 39/57 38/61 38/70 43/77 49/80 52/80 49/72 20/90 60/20 00/00 00/00 00/00 00/10 20/30 Cut Bank Rain Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 38/54 34/62 37/69 41/74 46/76 48/74 44/67 10/80 50/00 00/00 00/00 00/00 00/10 30/20 Havre Rain Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 39/62 35/65 36/73 43/79 48/82 51/83 49/77 30/60 20/10 00/00 00/00 10/00 00/10 20/10 Helena Tstrms Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 38/64 38/61 37/70 40/76 44/79 46/80 44/71 20/60 90/30 00/00 00/00 00/00 00/20 20/30 Lewistown Tstrms Mocldy Sunny Sunny Sunny Ptcldy Ptcldy 35/58 35/55 34/67 39/72 44/76 47/79 46/72 20/80 70/40 00/00 00/00 00/10 10/10 20/20 Shelby Rain Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 39/57 35/63 37/71 42/77 47/79 48/78 45/71 10/70 30/00 00/00 00/10 00/00 00/10 30/20 Chester Rain Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 38/58 34/63 36/73 40/77 45/80 47/80 45/73 30/60 20/10 00/00 00/10 00/00 00/10 20/20 Chinook Shwrs Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 39/63 37/65 37/72 43/79 47/83 50/84 49/79 20/60 10/10 00/00 00/10 10/00 00/10 20/10 Conrad Rain Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 38/55 35/63 37/71 42/76 46/79 48/78 45/70 10/90 40/00 00/00 00/10 00/00 00/10 20/20 Choteau Tstrms Ptcldy Ptcldy Sunny Ptcldy Ptcldy Ptcldy 37/54 34/61 37/70 42/76 46/79 48/78 45/69 20/90 60/00 00/00 00/00 00/00 00/10 20/20 Fort Benton Tstrms Ptcldy Sunny Sunny Sunny Ptcldy Ptcldy 41/61 39/65 38/75 43/80 48/83 50/83 49/76 20/70 30/10 00/00 00/00 00/00 00/10 20/20 Stanford Tstrms Ptcldy Sunny Sunny Sunny Ptcldy Ptcldy 38/57 37/56 35/65 42/72 48/76 51/78 49/70 20/90 60/40 00/00 00/10 00/10 00/10 20/20 White Sulphur Springs Ptcldy Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 33/58 34/55 32/64 37/71 42/76 45/77 43/69 20/40 90/30 00/10 00/00 00/10 00/10 20/30 ...SOUTHWEST MONTANA... Bozeman Airport Ptcldy Rain Ptcldy Sunny Sunny Sunny Ptcldy 33/62 35/55 31/67 38/75 42/80 45/81 44/73 20/20 100/70 00/00 00/00 10/00 10/20 20/30 Bozeman MSU Ptcldy Rnsnow Ptcldy Sunny Sunny Sunny Ptcldy 36/61 36/5333/65 40/74 45/78 48/80 47/72 20/30 90/80 00/00 00/00 10/00 10/20 10/30 West Yellowstone Ptcldy Rnsnow Ptcldy Sunny Sunny Sunny Ptcldy 26/57 30/51 24/62 30/68 34/74 37/76 38/67 10/30 90/60 00/10 00/00 10/10 00/10 10/20 Dillon Ptcldy Ptcldy Ptcldy Sunny Sunny Sunny Ptcldy 34/62 35/57 32/67 38/75 42/79 44/80 43/71 20/10 90/40 00/00 00/00 00/10 00/10 10/20 Boulder Tstrms Ptcldy Ptcldy Sunny Sunny Sunny Ptcldy 35/60 37/57 36/67 40/73 45/78 47/77 45/68 20/60 90/30 00/00 00/10 00/10 00/20 20/30 Townsend Tstrms Ptcldy Ptcldy Sunny Sunny Ptcldy Ptcldy 39/61 40/60 39/68 43/75 47/79 49/80 47/72 30/50 90/20 00/00 00/10 10/10 10/10 20/20 Virginia City Ptcldy Rnsnow Ptcldy Sunny Sunny Sunny Ptcldy 34/55 36/49 33/60 39/66 44/71 47/72 47/64 20/20 90/70 00/00 00/10 10/10 10/20 20/30 $$ http://www.weather.gov/greatfalls