On This Day, 21 August: Notable Weather Records
20 notable weather records on 21 August across the years, led by Upper Sandusky, US, with events and storms for the date.
Key Facts for 21 August
- 20 notable weather records were set or tied on 21 August in 8 years (1962 to 2023).
- Upper Sandusky set an all-time record daily precipitation of 237.5 mm (9.4 in) on 21 August 2007.
- 4 extreme weather events peaked on 21 August.
- 6 named storms were active on 21 August.
Records on 21 August Through the Years
1962 to 2023| Date | Kind | Detail |
|---|---|---|
| 1962-08-21 | Record daily precipitation | Heidelberg Cape (Pol), 109.0 mm (4.3 in) |
| 1971-08-21 | Record daily precipitation | Pearston (Pol), 68.0 mm (2.7 in) |
| 1999-08-21 | Record daily precipitation | Bradford Cntrl Fs, 141.2 mm (5.6 in) |
| 2003-08-21 | Record daily precipitation | Vacaville, 29.2 mm (1.1 in) |
| 2007-08-21 | Record daily precipitation | Upper Sandusky, 237.5 mm (9.4 in) |
| 2007-08-21 | Record daily precipitation | Mansfield 5 W, 131.8 mm (5.2 in) |
| 2007-08-21 | Record daily precipitation | Bellbrook (East Street), 179.0 mm (7.0 in) |
| 2007-08-21 | Record daily precipitation | Kempsey (Wide Street), 129.4 mm (5.1 in) |
| 2007-08-21 | Record daily precipitation | Wauchope (Avondale Street), 111.0 mm (4.4 in) |
| 2007-08-21 | Record daily precipitation | Wingham (Lanark Close), 132.0 mm (5.2 in) |
| 2007-08-21 | Record daily precipitation | Ebor (Wongwibinda), 72.6 mm (2.9 in) |
| 2007-08-21 | Record daily precipitation | Gloucester Post Office, 74.6 mm (2.9 in) |
| 2007-08-21 | Record daily precipitation | Jeogla Station, 92.0 mm (3.6 in) |
| 2007-08-21 | Record daily precipitation | Maclean (McLachlan Street), 148.0 mm (5.8 in) |
| 2016-08-21 | Record daily precipitation | Biscuit Flat (Woolmit), 37.4 mm (1.5 in) |
| 2017-08-21 | Record daily precipitation | Spirit Lake, 127.0 mm (5.0 in) |
| 2023-08-21 | Record daily precipitation | Big Tujunga Dam Fc46, 122.7 mm (4.8 in) |
| 2023-08-21 | Record daily precipitation | Trona, 88.9 mm (3.5 in) |
| 2023-08-21 | Record daily precipitation | Redlands, 39.9 mm (1.6 in) |
| 2023-08-21 | Record daily precipitation | N Fk Rs, 21.6 mm (0.9 in) |
Notable Records
| Date | Station | Record | Value | Beat old record by | Old record stood | Significance |
|---|---|---|---|---|---|---|
| 21 August 2007 | Upper Sandusky, US | all-time rain | 237.5 mm (9.4 in) | 98.1 mm (3.9 in) | 70 years | 91 of 100 (Exceptional) |
| 21 August 1999 | Bradford Cntrl Fs, US | all-time rain | 141.2 mm (5.6 in) | 39.6 mm (1.6 in) | 77 years | 90 of 100 (Exceptional) |
| 21 August 2003 | Vacaville, US | monthly rain | 29.2 mm (1.1 in) | 19.3 mm (0.8 in) | 87 years | 86 of 100 (Exceptional) |
| 21 August 2023 | Big Tujunga Dam Fc46, US | monthly rain | 122.7 mm (4.8 in) | 90.9 mm (3.6 in) | 81 years | 83 of 100 (Exceptional) |
| 21 August 2007 | Mansfield 5 W, US | all-time rain | 131.8 mm (5.2 in) | 27.7 mm (1.1 in) | 108 years | 82 of 100 (Exceptional) |
| 21 August 2023 | Trona, US | all-time rain | 88.9 mm (3.5 in) | 31.7 mm (1.2 in) | 39 years | 81 of 100 (Exceptional) |
| 21 August 2017 | Spirit Lake, US | daily rain | 127.0 mm (5.0 in) | 75.4 mm (3.0 in) | 120 years | 80 of 100 (Exceptional) |
| 21 August 2007 | Bellbrook (East Street), AU | daily rain | 179.0 mm (7.0 in) | 154.1 mm (6.1 in) | 114 years | 80 of 100 (Exceptional) |
| 21 August 2007 | Kempsey (Wide Street), AU | daily rain | 129.4 mm (5.1 in) | 109.1 mm (4.3 in) | 114 years | 80 of 100 (Exceptional) |
| 21 August 2007 | Wauchope (Avondale Street), AU | daily rain | 111.0 mm (4.4 in) | 78.7 mm (3.1 in) | 114 years | 80 of 100 (Exceptional) |
| 21 August 2023 | Redlands, US | daily rain | 39.9 mm (1.6 in) | 33.5 mm (1.3 in) | 109 years | 80 of 100 (Exceptional) |
| 21 August 2007 | Wingham (Lanark Close), AU | daily rain | 132.0 mm (5.2 in) | 73.6 mm (2.9 in) | 107 years | 80 of 100 (Exceptional) |
| 21 August 2007 | Ebor (Wongwibinda), AU | daily rain | 72.6 mm (2.9 in) | 52.3 mm (2.1 in) | 104 years | 80 of 100 (Exceptional) |
| 21 August 1971 | Pearston (Pol), ZA | monthly rain | 68.0 mm (2.7 in) | 29.9 mm (1.2 in) | 75 years | 80 of 100 (Exceptional) |
| 21 August 1962 | Heidelberg Cape (Pol), ZA | monthly rain | 109.0 mm (4.3 in) | 69.6 mm (2.7 in) | 73 years | 80 of 100 (Exceptional) |
| 21 August 2016 | Biscuit Flat (Woolmit), AU | daily rain | 37.4 mm (1.5 in) | 20.6 mm (0.8 in) | 98 years | 79 of 100 (Major) |
| 21 August 2007 | Gloucester Post Office, AU | daily rain | 74.6 mm (2.9 in) | 46.9 mm (1.8 in) | 107 years | 78 of 100 (Major) |
| 21 August 2007 | Jeogla Station, AU | daily rain | 92.0 mm (3.6 in) | 77.8 mm (3.1 in) | 96 years | 78 of 100 (Major) |
| 21 August 2007 | Maclean (McLachlan Street), AU | daily rain | 148.0 mm (5.8 in) | 120.1 mm (4.7 in) | 96 years | 78 of 100 (Major) |
| 21 August 2023 | N Fk Rs, US | daily rain | 21.6 mm (0.9 in) | 21.6 mm (0.9 in) | 117 years | 20 of 100 (Routine) |
Events
Storms
Download the Data
Source: NOAA National Centers for Environmental Information, Global Historical Climatology Network Daily (GHCN-Daily). Records are computed by World Extreme Weather Monitor and are not official NOAA products. (US Government open data (NOAA NCEI)) Data as of 2026-10-13 (13 October 2026). Records are computed by this site and are not official.
Data as of . Last revised (2026-10-13).