Every state’s recordsWyoming Weather Records
6 official all-time records
The official all-time extremes for Wyoming, as NOAA’s State Climate Extremes Committee lists them: from 115°F at Diversion Dam to -66°F at Riverside Ranger Stn. (Yellowstone NP).
| Record | Date | Where | Station | Status |
|---|
| -66°F | February 9, 1933 | Riverside Ranger Stn. (Yellowstone NP) | | EA |
Original observation of -66 degrees F at Riverside Ranger Station on February 9, 1933 is maintained in Department of Interior archives.
Greatest 24-Hour Precipitation
| Record | Date | Where | Station | Status |
|---|
| 6.06 inches | August 1, 1985 | Cheyenne | 24018 | 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 |
|---|
| 49 inches | March 21, 1924 | Hunter Station | 484770 | 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 |
|---|
| 128 inches | February 4, 1943 | Grassy Lake Dam | 484050 | N: Value is changed from extremes tables last updated by NCEI (formerly NCDC) between 1998 and 2006. Value exceeds all other valid values. |