Cold outbreak in United States, 14 May to 11 June 2021
Cold outbreak in United States, 14 May to 11 June 2021: 2,720 records at 1,699 stations, peak on 30 May 2021. Closed.
Data as of . Last revised (2026-10-17).
Key Facts
- Cold outbreak in United States, 14 May to 11 June 2021 set or tied 2,720 station records at 1,699 stations.
- It ran from 14 May 2021 to 11 June 2021 (29 days) and its peak day was 30 May 2021.
- Status: closed.
- Alicia 2 NNE set a monthly record low maximum temperature of 18.3 C (64.9 F) on 2 June 2021.
- The busiest day was 30 May 2021 with 449 records.
- The oldest broken record in the ranked list had stood for 177 years.
Footprint
14 May to 11 June 2021| Station | Type | Value | Date |
|---|---|---|---|
| Alicia 2 NNE | Record low maximum temperature | 18.3 C (64.9 F) | 2021-06-02 |
| Mt Sterling | Record low maximum temperature | 11.1 C (52.0 F) | 2021-05-30 |
| Russellville | Record low maximum temperature | 12.8 C (55.0 F) | 2021-05-30 |
| Chester | Record low maximum temperature | 0.6 C (33.1 F) | 2021-05-22 |
| Rogersville 1 NE | Record low maximum temperature | 15.6 C (60.1 F) | 2021-05-31 |
| Gibson Dam | Record low maximum temperature | -2.2 C (28.0 F) | 2021-05-22 |
| Phoenixville 1 E | Record low maximum temperature | 11.1 C (52.0 F) | 2021-05-30 |
| Quicksand | Record low maximum temperature | 14.4 C (57.9 F) | 2021-05-31 |
| Newport | Record low maximum temperature | 18.3 C (64.9 F) | 2021-06-02 |
| Ennis | Record low maximum temperature | -0.6 C (30.9 F) | 2021-05-22 |
| Knoxville | Record low maximum temperature | 8.3 C (46.9 F) | 2021-05-29 |
| Monroe City | Record low maximum temperature | 11.1 C (52.0 F) | 2021-05-29 |
| Hernando | Record low maximum temperature | 15.6 C (60.1 F) | 2021-05-30 |
| Choteau | Record low maximum temperature | 1.7 C (35.1 F) | 2021-05-20 |
| Wynne | Record low maximum temperature | 16.1 C (61.0 F) | 2021-05-30 |
| Newark Ag Farm | Record low maximum temperature | 11.1 C (52.0 F) | 2021-05-30 |
| Salem | Record low maximum temperature | 12.8 C (55.0 F) | 2021-05-30 |
| Kingston | Record low maximum temperature | 10.0 C (50.0 F) | 2021-05-30 |
| Fairfield | Record low maximum temperature | 14.4 C (57.9 F) | 2021-06-01 |
| Calico Rock 2 WSW | Record low maximum temperature | 17.8 C (64.0 F) | 2021-06-02 |
Records per Day
Peak day 449| Date | Records |
|---|---|
| 2021-05-14 | 2 |
| 2021-05-15 | 1 |
| 2021-05-16 | 7 |
| 2021-05-17 | 4 |
| 2021-05-18 | 15 |
| 2021-05-19 | 96 |
| 2021-05-20 | 272 |
| 2021-05-21 | 357 |
| 2021-05-22 | 234 |
| 2021-05-23 | 105 |
| 2021-05-24 | 43 |
| 2021-05-25 | 9 |
| 2021-05-26 | 21 |
| 2021-05-27 | 36 |
| 2021-05-28 | 190 |
| 2021-05-29 | 411 |
| 2021-05-30 | 449 |
| 2021-05-31 | 294 |
| 2021-06-01 | 57 |
| 2021-06-02 | 45 |
| 2021-06-03 | 10 |
| 2021-06-04 | 11 |
| 2021-06-05 | 15 |
| 2021-06-06 | 8 |
| 2021-06-07 | 11 |
| 2021-06-08 | 7 |
| 2021-06-09 | 7 |
| 2021-06-10 | 1 |
| 2021-06-11 | 2 |
Top Records by Margin
Margin over the record replaced| Quicksand, 05-31 | |
|---|---|
| Gibson Dam, 05-22 | |
| Ennis, 05-22 | |
| Chester, 05-22 | |
| Newark Ag Farm, 05-30 | |
| Mt Sterling, 05-30 | |
| Knoxville, 05-29 | |
| Russellville, 05-30 | |
| Phoenixville 1 E, 05-30 | |
| Monroe City, 05-29 | |
| Choteau, 05-20 | |
| Rogersville 1 NE, 05-31 | |
| Wynne, 05-30 | |
| Hernando, 05-30 | |
| Salem, 05-30 |
Margin is how far the new value is beyond the record it replaced. Ties are not shown.
Margin Against Age of the Broken Record
| Margin (C) | Years the old record stood |
|---|---|
| 2.3 | 107 |
| 6.7 | 120 |
| 6.6 | 126 |
| 7.2 | 119 |
| 5.0 | 111 |
| 0.6 | 131 |
| 7.8 | 91 |
| 7.8 | 94 |
| 5.6 | 106 |
| 6.7 | 94 |
| 4.4 | 112 |
| 5.6 | 114 |
| 7.3 | 94 |
| 5.0 | 91 |
| 7.2 | 80 |
| 3.9 | 104 |
| 4.4 | 106 |
| 5.5 | 103 |
| 4.4 | 106 |
| 1.1 | 85 |
| 3.4 | 114 |
| 0.5 | 92 |
| 3.9 | 96 |
| 3.9 | 123 |
| 6.1 | 91 |
| 4.5 | 103 |
| 6.2 | 91 |
| 4.5 | 106 |
| 3.9 | 106 |
| 0.5 | 94 |
| 6.6 | 94 |
| 5.0 | 104 |
| 5.5 | 108 |
| 4.4 | 120 |
| 4.5 | 111 |
| 3.9 | 106 |
| 3.3 | 119 |
| 5.6 | 94 |
| 5.6 | 94 |
| 3.4 | 103 |
| 4.4 | 104 |
| 3.9 | 108 |
| 3.9 | 111 |
| 6.0 | 94 |
| 2.8 | 114 |
| 4.4 | 55 |
| 7.2 | 48 |
| 3.9 | 110 |
| 5.0 | 94 |
| 5.0 | 94 |
| 3.9 | 104 |
| 3.9 | 120 |
| 3.4 | 104 |
| 3.3 | 111 |
| 2.3 | 106 |
| 2.8 | 126 |
| 3.4 | 106 |
| 2.8 | 120 |
| 2.8 | 120 |
| 2.8 | 115 |
| 2.8 | 106 |
| 3.3 | 106 |
| 2.8 | 126 |
| 2.2 | 106 |
| 3.4 | 118 |
| 3.4 | 127 |
| 2.2 | 104 |
| 3.4 | 114 |
| 5.0 | 94 |
| 2.3 | 103 |
| 2.8 | 103 |
| 3.3 | 104 |
| 5.0 | 91 |
| 2.2 | 104 |
| 2.2 | 106 |
| 2.7 | 108 |
| 2.3 | 126 |
| 3.9 | 94 |
| 1.7 | 103 |
| 4.5 | 88 |
| 2.8 | 104 |
| 2.8 | 104 |
| 2.3 | 104 |
| 2.8 | 126 |
| 2.2 | 118 |
| 2.2 | 106 |
| 3.9 | 53 |
| 2.2 | 177 |
| 2.2 | 136 |
| 1.1 | 120 |
| 1.6 | 104 |
| 1.7 | 115 |
| 2.2 | 106 |
| 1.7 | 123 |
| 2.8 | 96 |
| 1.1 | 111 |
| 2.8 | 94 |
| 1.7 | 114 |
| 2.2 | 96 |
| 1.1 | 103 |
| 1.7 | 100 |
| 5.0 | 83 |
| 1.6 | 126 |
| 1.7 | 106 |
| 2.2 | 126 |
| 2.2 | 126 |
| 2.2 | 118 |
| 5.5 | 83 |
| 2.2 | 111 |
| 2.2 | 122 |
| 3.9 | 91 |
| 2.2 | 103 |
| 1.1 | 104 |
| 1.7 | 104 |
| 2.2 | 118 |
| 1.1 | 121 |
| 1.6 | 94 |
| 3.9 | 50 |
| 1.7 | 118 |
| 1.7 | 120 |
| 1.1 | 106 |
| 1.1 | 104 |
| 1.7 | 120 |
| 1.7 | 96 |
| 5.6 | 74 |
| 1.1 | 119 |
| 1.6 | 122 |
| 1.1 | 114 |
| 1.2 | 106 |
| 0.6 | 75 |
| 1.1 | 114 |
| 1.7 | 103 |
| 1.1 | 118 |
| 1.1 | 123 |
| 1.1 | 96 |
| 1.1 | 106 |
| 7.2 | 66 |
| 2.3 | 94 |
| 2.3 | 94 |
| 2.8 | 94 |
| 1.2 | 104 |
| 5.6 | 75 |
| 4.5 | 83 |
| 1.1 | 111 |
| 1.7 | 94 |
| 2.7 | 94 |
| 1.1 | 106 |
| 4.4 | 71 |
| 1.1 | 106 |
| 3.9 | 91 |
| 1.6 | 120 |
| 1.1 | 106 |
| 6.7 | 56 |
| 0.6 | 118 |
| 0.6 | 118 |
| 3.9 | 50 |
| 5.0 | 74 |
| 1.1 | 106 |
| 1.1 | 106 |
| 1.1 | 106 |
| 0.6 | 106 |
| 2.2 | 91 |
| 0.6 | 106 |
| 0.5 | 115 |
| 1.1 | 108 |
| 1.1 | 99 |
| 0.5 | 106 |
| 0.6 | 114 |
| 0.6 | 114 |
| 1.1 | 67 |
| 2.2 | 94 |
| 1.1 | 67 |
| 0.6 | 106 |
| 0.5 | 106 |
| 3.8 | 83 |
| 1.1 | 104 |
| 2.2 | 91 |
| 2.2 | 91 |
| 1.1 | 126 |
| 0.6 | 111 |
| 0.5 | 104 |
| 0.6 | 118 |
| 0.5 | 114 |
| 1.7 | 94 |
| 2.2 | 91 |
| 3.4 | 78 |
| 0.5 | 103 |
| 2.3 | 91 |
| 3.3 | 74 |
| 4.5 | 56 |
| 0.5 | 118 |
| 0.6 | 123 |
| 0.5 | 104 |
| 0.5 | 106 |
| 1.1 | 96 |
| 0.6 | 96 |
| 1.6 | 90 |
| 0.5 | 114 |
| 1.7 | 94 |
| 1.7 | 94 |
Compared With Other Events
Station records per event| Cold outbreak in United States and Mexico, 6 February to 5 March 2021 | |
|---|---|
| Cold outbreak in United States and Mexico, 13 October to 5 November 2020 | |
| Cold outbreak in United States and Mexico, 23 December 2017 to 8 January 2018 | |
| Cold outbreak in United States and Mexico, 3 to 23 January 2024 | |
| Cold outbreak in United States, 15 January to 10 February 2026 | |
| Cold outbreak in United States, 14 May to 11 June 2021 (this event) |
Every Record Set
20 of 2,720| Date | Station | Record | Value | Margin | Years stood | Significance |
|---|---|---|---|---|---|---|
| 2021-05-20 | Choteau | Record low maximum temperature | 1.7 C (35.1 F) | 5.5 C (9.9 F) | 103 | 49 of 100 (Notable) |
| 2021-05-22 | Chester | Record low maximum temperature | 0.6 C (33.1 F) | 7.2 C (13.0 F) | 119 | 52 of 100 (Notable) |
| 2021-05-22 | Gibson Dam | Record low maximum temperature | -2.2 C (28.0 F) | 7.8 C (14.0 F) | 94 | 51 of 100 (Notable) |
| 2021-05-22 | Ennis | Record low maximum temperature | -0.6 C (30.9 F) | 7.3 C (13.1 F) | 94 | 50 of 100 (Notable) |
| 2021-05-29 | Knoxville | Record low maximum temperature | 8.3 C (46.9 F) | 6.7 C (12.1 F) | 94 | 50 of 100 (Notable) |
| 2021-05-29 | Monroe City | Record low maximum temperature | 11.1 C (52.0 F) | 5.6 C (10.1 F) | 114 | 50 of 100 (Notable) |
| 2021-05-30 | Mt Sterling | Record low maximum temperature | 11.1 C (52.0 F) | 6.7 C (12.1 F) | 120 | 53 of 100 (Notable) |
| 2021-05-30 | Russellville | Record low maximum temperature | 12.8 C (55.0 F) | 6.6 C (11.9 F) | 126 | 53 of 100 (Notable) |
| 2021-05-30 | Phoenixville 1 E | Record low maximum temperature | 11.1 C (52.0 F) | 5.6 C (10.1 F) | 106 | 51 of 100 (Notable) |
| 2021-05-30 | Hernando | Record low maximum temperature | 15.6 C (60.1 F) | 4.4 C (7.9 F) | 112 | 50 of 100 (Notable) |
| 2021-05-30 | Wynne | Record low maximum temperature | 16.1 C (61.0 F) | 5.0 C (9.0 F) | 91 | 49 of 100 (Notable) |
| 2021-05-30 | Newark Ag Farm | Record low maximum temperature | 11.1 C (52.0 F) | 7.2 C (13.0 F) | 80 | 49 of 100 (Notable) |
| 2021-05-30 | Salem | Record low maximum temperature | 12.8 C (55.0 F) | 4.4 C (7.9 F) | 106 | 49 of 100 (Notable) |
| 2021-05-30 | Kingston | Record low maximum temperature | 10.0 C (50.0 F) | 4.4 C (7.9 F) | 106 | 49 of 100 (Notable) |
| 2021-05-31 | Rogersville 1 NE | Record low maximum temperature | 15.6 C (60.1 F) | 5.0 C (9.0 F) | 111 | 52 of 100 (Notable) |
| 2021-05-31 | Quicksand | Record low maximum temperature | 14.4 C (57.9 F) | 7.8 C (14.0 F) | 91 | 51 of 100 (Notable) |
| 2021-06-01 | Fairfield | Record low maximum temperature | 14.4 C (57.9 F) | 3.9 C (7.0 F) | 104 | 49 of 100 (Notable) |
| 2021-06-02 | Alicia 2 NNE | Record low maximum temperature | 18.3 C (64.9 F) | 2.3 C (4.1 F) | 107 | 56 of 100 (Notable) |
| 2021-06-02 | Newport | Record low maximum temperature | 18.3 C (64.9 F) | 0.6 C (1.1 F) | 131 | 51 of 100 (Notable) |
| 2021-06-02 | Calico Rock 2 WSW | Record low maximum temperature | 17.8 C (64.0 F) | 1.1 C (2.0 F) | 85 | 48 of 100 (Notable) |
The daily ledgers keep a limited number of records per day, so this list has 20 of the 2,720 records the event counts. The counts above use the full total.
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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 2026-10-17. Events are found by this site from station records and are not official designations. Records are provisional until reprocessed.