Every state’s recordsSouth Dakota Weather Records
9 official all-time records
The official all-time extremes for South Dakota, as NOAA’s State Climate Extremes Committee lists them: from 120°F at Fort Pierre to -58°F at McIntosh.
| Record | Date | Where | Station | Status |
|---|
| -58°F | February 17, 1936 | McIntosh | 395381 | E: Value is unchanged from previous extremes tables last updated by NCEI (formerly NCDC) between 1998 and 2006. Value exceeds all other valid values. |
Greatest 24-Hour Precipitation
| Record | Date | Where | Station | Status |
|---|
| 8.74 inches | May 6, 2007 | Groton | 393456 | NSA |
The reported value was evaluated by the State Climate Extremes Committee. Greater amounts have fallen in 24 hours or less across SD, but were not observed by reliable precipitation measurement gauges. A survey after the June 9, 1972 Black Hills flood indicated rainfall up to 15 inches in 6 hours may have occurred near Keystone. On June 13-14, 1976 up to 10 inches of rain may have fallen over the Black Hills, while on June 14, 1996 a near-stationary thunderstorm produced an estimated 14 inches of rain between Sturgis and Hereford. On August 17, 2007 an estimated 10.5 inches of rain fell west of Hermosa. Slow moving thunderstorms on May 8, 2018 produced large storm totals across parts of SD including an unofficial 24-hour report measuring 13.15 inches northwest of Long Lake.
| Record | Date | Where | Station | Status |
|---|
| 52 inches | March 14, 1973 | Lead | 394834 | N: Value is changed from extremes tables last updated by NCEI (formerly NCDC) between 1998 and 2006. Value exceeds all other valid values. |
| Record | Date | Where | Station | Status |
|---|
| 73 inches | March 1, 1998 | Lead | 394834 | E: Value is unchanged from previous extremes tables last updated by NCEI (formerly NCDC) between 1998 and 2006. Value exceeds all other valid values. |
| Record | Date | Where | Station | Status |
|---|
| 1.938 pounds | July 23, 2010 | Vivian | | A: Additional information is available. Official value may be exceeded by a widely accepted unofficial value that is not supported by a direct, calibrated observation (e.g., estimates, uncalibrated instruments, anecdotal reports). |
The reported value has been evaluated by the National Climate Extremes Committee and found to be accurate. This hail stone is the heaviest and greatest diameter stone on record for the United States. When initially collected after the storm, the stone had a reported diameter of 11 inches, but deteriorated in the observer's freezer owing to a loss of power after the storm. The Aurora, NE hail stone remains the largest circumference stone on record for the United States.
| Record | Date | Where | Station | Status |
|---|
| 18.625 inches | July 23, 2010 | Vivian | | A: Additional information is available. Official value may be exceeded by a widely accepted unofficial value that is not supported by a direct, calibrated observation (e.g., estimates, uncalibrated instruments, anecdotal reports). |
The reported value has been evaluated by the National Climate Extremes Committee and found to be accurate. This hail stone is the heaviest and greatest diameter stone on record for the United States. When initially collected after the storm, the stone had a reported diameter of 11 inches, but deteriorated in the observer's freezer owing to a loss of power after the storm. The Aurora, NE hail stone remains the largest circumference stone on record for the United States.
| Record | Date | Where | Station | Status |
|---|
| 8 inches | July 23, 2010 | Vivian | | A: Additional information is available. Official value may be exceeded by a widely accepted unofficial value that is not supported by a direct, calibrated observation (e.g., estimates, uncalibrated instruments, anecdotal reports). |
The reported value has been evaluated by the National Climate Extremes Committee and found to be accurate. This hail stone is the heaviest and greatest diameter stone on record for the United States. When initially collected after the storm, the stone had a reported diameter of 11 inches, but deteriorated in the observer's freezer owing to a loss of power after the storm. The Aurora, NE hail stone remains the largest circumference stone on record for the United States.