FPUS65 KTFX 180631 SFTTFX MTZ301>330-191100- Tabular State Forecast for North Central and Southwest Montana National Weather Service Great Falls MT 1231 AM MDT Mon May 18 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 Tue Wed Thu Fri Sat Sun Mon May 19 May 20 May 21 May 22 May 23 May 24 May 25 ...CENTRAL MONTANA... Great Falls Ptcldy Rain Ptcldy Ptcldy Ptcldy Ptcldy Sunny 29/63 40/61 38/64 41/69 44/75 48/77 49/77 00/30 10/60 60/10 10/10 00/00 00/00 00/10 Cut Bank Ptcldy Rain Ptcldy Ptcldy Sunny Sunny Ptcldy 31/63 38/57 34/64 39/67 40/72 43/73 45/72 10/20 10/60 40/00 10/20 00/00 00/10 10/10 Havre Rain Mocldy Ptcldy Ptcldy Sunny Ptcldy Sunny 26/66 41/64 36/66 39/70 42/77 46/79 47/80 00/50 10/40 30/10 10/10 10/00 10/10 10/10 Helena Ptcldy Ptcldy Ptcldy Ptcldy Ptcldy Sunny Sunny 29/62 38/65 38/65 39/70 41/75 44/78 45/78 10/20 00/30 70/10 00/10 00/00 00/00 00/10 Lewistown Ptcldy Rain Ptcldy Ptcldy Sunny Ptcldy Sunny 23/59 36/59 35/59 36/64 39/71 43/74 44/75 00/30 00/50 70/30 10/20 10/00 10/10 00/10 Shelby Ptcldy Rain Ptcldy Ptcldy Sunny Ptcldy Ptcldy 28/64 40/60 36/65 40/69 41/74 45/75 46/75 10/30 10/50 40/00 10/10 00/00 10/00 10/10 Chester Ptcldy Rain Ptcldy Ptcldy Sunny Sunny Sunny 27/65 38/61 35/65 38/69 40/75 43/77 45/77 00/30 10/50 30/10 10/10 10/00 00/10 10/10 Chinook Ptcldy Ptcldy Ptcldy Ptcldy Sunny Ptcldy Sunny 25/65 41/64 37/66 39/71 42/77 46/79 47/80 00/30 10/40 30/10 10/10 10/00 10/10 10/10 Conrad Ptcldy Rain Ptcldy Ptcldy Sunny Ptcldy Ptcldy 28/65 39/60 35/65 39/69 41/74 44/76 45/75 10/20 00/70 50/00 10/20 00/00 00/00 10/10 Choteau Ptcldy Rain Ptcldy Ptcldy Ptcldy Ptcldy Ptcldy 27/63 38/59 35/64 40/68 41/74 45/76 46/75 10/20 00/70 60/10 10/20 00/00 00/00 10/10 Fort Benton Ptcldy Rain Ptcldy Ptcldy Sunny Ptcldy Sunny 28/66 42/65 39/67 41/71 43/78 47/81 49/80 00/30 00/50 50/20 10/10 10/00 10/10 10/10 Stanford Ptcldy Rain Ptcldy Ptcldy Sunny Ptcldy Sunny 24/59 39/59 36/59 39/64 42/71 47/73 48/74 00/30 00/60 70/30 10/20 10/10 00/10 10/10 White Sulphur Springs Ptcldy Ptcldy Ptcldy Ptcldy Ptcldy Ptcldy Ptcldy 22/56 34/59 34/59 35/64 37/71 41/74 43/73 00/20 00/30 70/20 10/20 00/00 10/10 00/10 ...SOUTHWEST MONTANA... Bozeman Airport Ptcldy Ptcldy Ptcldy Ptcldy Sunny Ptcldy Sunny 22/60 34/64 34/61 35/68 38/75 42/78 43/80 00/10 00/10 70/30 10/10 00/00 10/10 00/10 Bozeman MSU Ptcldy Ptcldy Rain Ptcldy Sunny Ptcldy Sunny 24/58 36/6336/59 37/67 40/74 44/77 46/79 10/10 00/20 80/50 10/10 10/00 10/10 00/10 West Yellowstone Ptcldy Ptcldy Ptcldy Ptcldy Ptcldy Sunny Sunny 16/51 24/58 28/57 28/63 30/70 33/73 35/76 10/20 00/10 50/30 10/20 00/00 00/00 00/00 Dillon Ptcldy Ptcldy Ptcldy Ptcldy Sunny Sunny Sunny 23/60 30/63 34/63 36/68 38/75 41/78 43/79 10/20 00/00 40/10 10/10 00/00 00/00 00/10 Boulder Ptcldy Ptcldy Ptcldy Ptcldy Sunny Sunny Sunny 26/58 33/61 36/62 38/66 40/73 43/75 45/75 10/20 00/30 60/20 10/20 00/00 00/00 00/10 Townsend Ptcldy Ptcldy Ptcldy Ptcldy Sunny Ptcldy Sunny 29/61 39/63 39/63 41/68 44/75 46/78 47/79 10/30 00/20 60/10 10/20 00/00 00/10 10/10 Virginia City Ptcldy Ptcldy Ptcldy Ptcldy Sunny Ptcldy Sunny 23/53 31/56 35/55 36/61 39/66 43/69 45/71 00/20 00/10 70/40 10/10 10/00 00/10 10/10 $$ http://www.weather.gov/greatfalls