FPUS63 KFSD 181938 SFTSD SDZ001>074-191000- Tabular State Forecast for South Dakota National Weather Service Sioux Falls SD 238 PM 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 Tue Wed Thu Fri Sat Sun Mon May 19 May 20 May 21 May 22 May 23 May 24 May 25 ...WESTERN SOUTH DAKOTA... Buffalo Ptcldy Sunny Ptcldy Ptcldy Ptcldy Sunny Sunny 31/60 35/71 40/67 39/65 40/74 45/83 48/87 20/00 00/00 10/40 50/30 30/10 10/00 00/00 Custer Sunny Ptcldy Tstrms Tstrms Sunny Sunny Sunny 23/52 31/58 37/60 37/57 38/67 44/77 48/80 60/10 10/30 30/70 70/50 50/20 20/10 10/10 Faith Ptcldy Sunny Ptcldy Ptcldy Ptcldy Sunny Sunny 31/58 34/69 40/70 41/64 41/74 45/84 50/88 70/10 00/10 10/40 60/40 30/20 10/00 00/00 Philip Ptcldy Ptcldy Ptcldy Tstrms Ptcldy Sunny Sunny 31/60 33/66 40/71 41/66 41/76 46/88 51/91 80/20 00/20 20/30 60/60 40/10 10/00 00/00 Pine Ridge Sunny Ptcldy Ptcldy Tstrms Ptcldy Sunny Sunny 30/59 35/63 39/69 39/65 40/76 45/86 49/88 80/10 00/40 20/40 70/50 40/10 10/10 10/00 Rapid City Sunny Sunny Tstrms Ptcldy Ptcldy Sunny Sunny 30/60 34/68 41/69 41/65 42/75 46/86 50/90 60/00 00/20 20/60 60/40 40/20 20/10 10/10 ...CENTRAL SOUTH DAKOTA... Chamberlain Ptcldy Ptcldy Ptcldy Tstrms Ptcldy Sunny Sunny 37/57 34/65 42/67 43/65 43/74 48/85 54/88 70/00 00/00 00/10 50/50 50/20 20/10 10/10 Mobridge Ptcldy Sunny Ptcldy Shwrs Ptcldy Sunny Sunny 35/56 33/69 41/70 41/66 41/73 46/84 50/87 90/10 00/00 00/20 50/50 40/20 10/10 10/10 Pierre Ptcldy Sunny Ptcldy Shwrs Ptcldy Sunny Sunny 36/58 33/67 41/70 42/66 42/75 46/86 51/89 90/00 00/10 10/20 50/50 50/20 10/10 10/00 Winner Ptcldy Ptcldy Ptcldy Tstrms Ptcldy Sunny Sunny 34/57 34/64 42/67 43/65 43/74 49/85 54/88 60/10 00/00 00/20 50/50 50/20 20/10 10/10 ...EASTERN SOUTH DAKOTA... Aberdeen Mocldy Sunny Ptcldy Shwrs Ptcldy Ptcldy Sunny 36/55 30/66 40/69 42/65 41/71 45/84 51/87 80/00 00/00 00/10 40/50 50/20 20/10 20/10 Huron Mocldy Sunny Ptcldy Shwrs Ptcldy Ptcldy Sunny 38/57 31/66 41/68 43/66 43/73 48/84 54/88 80/10 00/00 00/10 30/50 50/30 20/10 20/10 Mitchell Mocldy Ptcldy Ptcldy Tstrms Ptcldy Sunny Sunny 39/57 32/65 42/67 43/66 44/73 49/85 55/89 80/00 00/00 00/10 40/50 50/20 20/10 20/10 Sioux Falls Mocldy Ptcldy Mocldy Tstrms Mocldy Ptcldy Ptcldy 41/56 34/63 42/64 44/64 45/72 50/82 56/87 80/00 00/00 00/10 20/60 60/30 20/20 20/10 Sisseton Mocldy Sunny Ptcldy Shwrs Ptcldy Ptcldy Sunny 38/51 32/64 41/6843/64 43/69 47/81 52/85 100/10 00/00 00/00 10/50 50/30 20/10 20/10 Watertown Mocldy Sunny Ptcldy Shwrs Mocldy Ptcldy Sunny 37/50 31/62 40/65 42/62 42/69 46/80 52/84 90/10 00/00 00/00 20/50 50/30 20/10 20/10 Yankton Ptcldy Ptcldy Mocldy Tstrms Mocldy Ptcldy Ptcldy 40/59 34/63 42/65 44/65 45/73 50/84 56/88 70/00 00/00 00/10 40/60 60/30 20/20 10/20 $$