FPUS63 KFSD 181049 SFTSD SDZ001>074-182200- Tabular State Forecast for South Dakota National Weather Service Sioux Falls SD 548 AM CDT 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 ...WESTERN SOUTH DAKOTA... Buffalo Shwrs Ptcldy Sunny Shwrs Ptcldy Ptcldy Ptcldy /46 31/59 34/72 42/65 39/68 41/75 46/83 /60 40/10 00/00 10/50 50/20 20/10 10/10 Custer Snoshwr Ptcldy Sunny Tstrms Ptcldy Ptcldy Sunny /37 24/51 30/60 37/59 36/61 39/69 45/78 /100 100/00 00/10 10/70 70/40 40/10 10/10 Faith Shwrs Ptcldy Sunny Ptcldy Ptcldy Ptcldy Ptcldy /47 32/58 33/72 41/68 40/68 42/76 47/85 /90 90/20 00/00 10/40 40/20 20/10 10/10 Philip Shwrs Ptcldy Sunny Ptcldy Ptcldy Ptcldy Sunny /47 31/60 33/70 42/72 41/71 43/79 48/89 /100 100/10 00/10 10/30 40/30 20/10 10/10 Pine Ridge Shwrs Ptcldy Ptcldy Ptcldy Ptcldy Ptcldy Sunny /42 29/59 34/66 40/69 38/70 41/78 47/87 /100 100/00 00/40 30/40 40/30 30/10 10/00 Rapid City Shwrs Sunny Sunny Shwrs Ptcldy Ptcldy Sunny /43 31/60 34/70 42/68 40/70 43/78 48/87 /100 100/10 10/10 10/50 50/30 30/10 10/00 ...CENTRAL SOUTH DAKOTA... Chamberlain Shwrs Ptcldy Ptcldy Ptcldy Shwrs Ptcldy Ptcldy /52 36/57 33/68 44/71 44/71 46/76 50/85 /80 80/00 00/10 10/30 50/50 40/20 20/10 Mobridge Shwrs Ptcldy Sunny Ptcldy Ptcldy Ptcldy Ptcldy /49 34/56 33/70 43/70 41/68 43/76 47/83 /80 80/10 00/00 00/30 40/30 30/10 10/10 Pierre Shwrs Ptcldy Sunny Ptcldy Ptcldy Ptcldy Ptcldy /50 35/58 33/70 43/71 42/70 44/77 48/86 /90 90/00 00/00 00/30 50/40 30/10 10/10 Winner Shwrs Ptcldy Ptcldy Ptcldy Shwrs Ptcldy Ptcldy /48 35/57 34/67 44/70 44/71 46/77 51/86 /90 90/00 00/00 00/30 50/50 30/10 10/10 ...EASTERN SOUTH DAKOTA... Aberdeen Shwrs Ptcldy Sunny Ptcldy Shwrs Ptcldy Ptcldy /53 35/54 30/68 42/70 42/68 43/75 47/83 /80 80/00 00/00 00/20 50/50 40/20 20/10 Huron Shwrs Ptcldy Sunny Ptcldy Mocldy Ptcldy Ptcldy /55 37/56 32/68 43/71 44/70 45/77 49/85 /80 70/10 00/00 00/20 40/40 40/20 20/10 Mitchell Shwrs Ptcldy Sunny Ptcldy Shwrs Ptcldy Ptcldy /56 38/57 32/67 43/71 44/71 46/77 50/86 /80 80/10 00/00 00/20 50/50 40/20 20/20 Sioux Falls Tstrms Mocldy Ptcldy Ptcldy Mocldy Ptcldy Ptcldy /61 41/57 35/64 43/68 45/69 47/75 51/83 /60 80/20 00/00 00/10 40/40 30/30 20/20 Sisseton Shwrs Mocldy Sunny Ptcldy Shwrs Ptcldy Ptcldy /54 37/51 33/6543/69 44/66 45/72 48/81 /60 90/00 00/00 00/20 40/50 50/10 10/10 Watertown Shwrs Mocldy Sunny Ptcldy Shwrs Ptcldy Ptcldy /54 36/51 32/64 41/66 43/65 44/71 48/80 /70 90/00 00/00 00/20 40/50 50/20 20/20 Yankton Shwrs Ptcldy Ptcldy Mocldy Tstrms Ptcldy Ptcldy /61 40/58 35/66 43/69 45/71 48/77 52/85 /70 70/10 00/00 00/10 50/50 30/30 20/10 $$