FPUS65 KTFX 181831 SFTTFX MTZ301>330-182300- Tabular State Forecast for North Central and Southwest Montana National Weather Service Great Falls MT 1231 PM 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 Today Tue Wed Thu Fri Sat Sun May 18 May 19 May 20 May 21 May 22 May 23 May 24 ...CENTRAL MONTANA... Great Falls Ptcldy Ptcldy Rain Ptcldy Ptcldy Sunny Ptcldy /53 30/64 40/56 38/61 39/69 43/76 50/79 /10 00/40 20/70 80/30 00/00 00/00 00/00 Cut Bank Ptcldy Ptcldy Rain Ptcldy Ptcldy Sunny Ptcldy /54 29/63 37/53 34/62 37/68 40/74 45/74 /20 30/20 30/90 40/10 00/10 00/00 00/10 Havre Ptcldy Ptcldy Rain Ptcldy Ptcldy Sunny Ptcldy /55 28/68 40/60 36/65 36/72 42/78 47/81 /10 00/40 60/50 30/10 00/00 00/00 10/00 Helena Ptcldy Ptcldy Ptcldy Rain Ptcldy Sunny Sunny /56 30/65 38/60 37/64 38/70 40/76 44/79 /10 10/30 30/40 80/50 00/10 00/00 10/10 Lewistown Mocldy Sunny Tstrms Rain Ptcldy Sunny Ptcldy /46 26/60 36/56 35/56 34/64 39/72 43/76 /40 00/20 30/70 80/60 10/10 00/00 00/10 Shelby Ptcldy Ptcldy Rain Ptcldy Ptcldy Sunny Ptcldy /56 29/65 39/56 35/64 37/70 41/76 46/77 /10 20/30 20/70 50/10 00/00 00/00 00/10 Chester Ptcldy Ptcldy Rain Ptcldy Ptcldy Sunny Ptcldy /55 28/65 37/57 35/64 36/70 40/77 44/79 /10 10/40 30/70 40/10 00/00 00/00 00/00 Chinook Ptcldy Ptcldy Rain Ptcldy Sunny Sunny Ptcldy /54 28/68 39/61 37/65 37/71 42/79 46/82 /10 00/20 20/50 20/10 00/10 00/00 10/00 Conrad Ptcldy Ptcldy Rain Ptcldy Ptcldy Sunny Ptcldy /55 29/65 38/56 35/63 37/70 41/76 46/78 /20 20/30 30/80 60/10 00/00 00/00 00/00 Choteau Ptcldy Ptcldy Rain Ptcldy Ptcldy Sunny Ptcldy /54 28/64 37/55 34/63 37/69 41/75 46/78 /10 20/20 30/90 70/20 00/00 00/00 00/00 Fort Benton Ptcldy Ptcldy Rain Ptcldy Ptcldy Sunny Ptcldy /56 30/68 41/59 39/65 39/72 42/79 48/83 /10 00/30 30/70 70/20 00/00 00/00 00/10 Stanford Ptcldy Sunny Tstrms Rain Sunny Sunny Sunny /48 27/61 38/55 37/57 36/64 41/72 47/76 /20 00/20 30/80 90/60 10/10 00/00 00/10 White Sulphur Springs Ptcldy Sunny Ptcldy Rnsnow Ptcldy Sunny Sunny /49 24/59 34/55 34/56 33/64 37/71 42/76 /20 00/20 30/40 80/50 00/10 00/00 10/10 ...SOUTHWEST MONTANA... Bozeman Airport Ptcldy Sunny Ptcldy Rain Sunny Sunny Sunny /51 24/62 33/60 34/59 32/66 37/75 42/80 /10 00/00 30/20 90/60 10/10 00/00 10/10 Bozeman MSU Mocldy Sunny Ptcldy Rnsnow Ptcldy Sunny Sunny /48 25/6036/58 36/58 34/65 39/73 45/79 /20 00/00 20/20 90/70 10/10 00/00 10/10 West Yellowstone Ptcldy Sunny Ptcldy Rnsnow Ptcldy Sunny Sunny /44 15/54 25/54 29/55 26/61 29/68 34/74 /10 00/10 20/20 80/60 10/10 00/00 00/10 Dillon Sunny Sunny Ptcldy Ptcldy Sunny Sunny Sunny /51 25/61 33/61 34/60 33/66 37/74 42/79 /10 00/10 20/10 70/30 00/00 00/00 10/00 Boulder Ptcldy Ptcldy Ptcldy Ptcldy Ptcldy Sunny Sunny /51 29/60 36/56 36/60 36/66 40/73 45/77 /10 10/30 30/40 80/40 00/10 00/10 10/10 Townsend Sunny Ptcldy Ptcldy Ptcldy Sunny Sunny Sunny /55 31/63 40/59 39/63 39/68 43/75 47/79 /10 00/20 30/30 80/40 00/00 00/00 10/10 Virginia City Ptcldy Sunny Ptcldy Rnsnow Ptcldy Sunny Sunny /43 23/54 34/54 35/52 34/60 38/67 44/71 /20 00/10 20/10 90/60 10/10 00/00 10/10 $$ http://www.weather.gov/greatfalls