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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

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
Footprint of Cold outbreak in United States, 14 May to 11 June 2021 The area covered by Cold outbreak in United States, 14 May to 11 June 2021 is outlined, with 20 of the stations that set records marked, coloured by record type.
The area covered by Cold outbreak in United States, 14 May to 11 June 2021 is outlined, with 20 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Cold outbreak in United States, 14 May to 11 June 2021: stations that set records in the event
StationTypeValueDate
Alicia 2 NNERecord low maximum temperature18.3 C (64.9 F)2021-06-02
Mt SterlingRecord low maximum temperature11.1 C (52.0 F)2021-05-30
RussellvilleRecord low maximum temperature12.8 C (55.0 F)2021-05-30
ChesterRecord low maximum temperature0.6 C (33.1 F)2021-05-22
Rogersville 1 NERecord low maximum temperature15.6 C (60.1 F)2021-05-31
Gibson DamRecord low maximum temperature-2.2 C (28.0 F)2021-05-22
Phoenixville 1 ERecord low maximum temperature11.1 C (52.0 F)2021-05-30
QuicksandRecord low maximum temperature14.4 C (57.9 F)2021-05-31
NewportRecord low maximum temperature18.3 C (64.9 F)2021-06-02
EnnisRecord low maximum temperature-0.6 C (30.9 F)2021-05-22
KnoxvilleRecord low maximum temperature8.3 C (46.9 F)2021-05-29
Monroe CityRecord low maximum temperature11.1 C (52.0 F)2021-05-29
HernandoRecord low maximum temperature15.6 C (60.1 F)2021-05-30
ChoteauRecord low maximum temperature1.7 C (35.1 F)2021-05-20
WynneRecord low maximum temperature16.1 C (61.0 F)2021-05-30
Newark Ag FarmRecord low maximum temperature11.1 C (52.0 F)2021-05-30
SalemRecord low maximum temperature12.8 C (55.0 F)2021-05-30
KingstonRecord low maximum temperature10.0 C (50.0 F)2021-05-30
FairfieldRecord low maximum temperature14.4 C (57.9 F)2021-06-01
Calico Rock 2 WSWRecord low maximum temperature17.8 C (64.0 F)2021-06-02

Records per Day

Peak day 449
Records per day during Cold outbreak in United States, 14 May to 11 June 2021 Records set or tied each day from 14 May 2021 to 11 June 2021. The most in one day was 449 on 30 May 2021. 0 125 250 375 500 05-1405-1705-2005-2305-2605-2906-0106-0406-0706-10
Records set or tied each day from 14 May 2021 to 11 June 2021. The most in one day was 449 on 30 May 2021.
Records per day during Cold outbreak in United States, 14 May to 11 June 2021
DateRecords
2021-05-142
2021-05-151
2021-05-167
2021-05-174
2021-05-1815
2021-05-1996
2021-05-20272
2021-05-21357
2021-05-22234
2021-05-23105
2021-05-2443
2021-05-259
2021-05-2621
2021-05-2736
2021-05-28190
2021-05-29411
2021-05-30449
2021-05-31294
2021-06-0157
2021-06-0245
2021-06-0310
2021-06-0411
2021-06-0515
2021-06-068
2021-06-0711
2021-06-087
2021-06-097
2021-06-101
2021-06-112

Top Records by Margin

Margin over the record replaced
Top records of Cold outbreak in United States, 14 May to 11 June 2021 ranked by margin
Quicksand, 05-317.8 C (14.0 F)
Gibson Dam, 05-227.8 C (14.0 F)
Ennis, 05-227.3 C (13.1 F)
Chester, 05-227.2 C (13.0 F)
Newark Ag Farm, 05-307.2 C (13.0 F)
Mt Sterling, 05-306.7 C (12.1 F)
Knoxville, 05-296.7 C (12.1 F)
Russellville, 05-306.6 C (11.9 F)
Phoenixville 1 E, 05-305.6 C (10.1 F)
Monroe City, 05-295.6 C (10.1 F)
Choteau, 05-205.5 C (9.9 F)
Rogersville 1 NE, 05-315.0 C (9.0 F)
Wynne, 05-305.0 C (9.0 F)
Hernando, 05-304.4 C (7.9 F)
Salem, 05-304.4 C (7.9 F)

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 against age of the broken record in Cold outbreak in United States, 14 May to 11 June 2021 500 records plotted by how far they beat the old record (across) and how many years the old record had stood (up). Long standing records beaten by a wide margin sit in the top right. 0 50 100 150 200 0.02.55.07.510.0 Margin (C) Years the old record stood
500 records plotted by how far they beat the old record (across) and how many years the old record had stood (up). Long standing records beaten by a wide margin sit in the top right.
Margin against age of the broken record in Cold outbreak in United States, 14 May to 11 June 2021
Margin (C)Years the old record stood
2.3107
6.7120
6.6126
7.2119
5.0111
0.6131
7.891
7.894
5.6106
6.794
4.4112
5.6114
7.394
5.091
7.280
3.9104
4.4106
5.5103
4.4106
1.185
3.4114
0.592
3.996
3.9123
6.191
4.5103
6.291
4.5106
3.9106
0.594
6.694
5.0104
5.5108
4.4120
4.5111
3.9106
3.3119
5.694
5.694
3.4103
4.4104
3.9108
3.9111
6.094
2.8114
4.455
7.248
3.9110
5.094
5.094
3.9104
3.9120
3.4104
3.3111
2.3106
2.8126
3.4106
2.8120
2.8120
2.8115
2.8106
3.3106
2.8126
2.2106
3.4118
3.4127
2.2104
3.4114
5.094
2.3103
2.8103
3.3104
5.091
2.2104
2.2106
2.7108
2.3126
3.994
1.7103
4.588
2.8104
2.8104
2.3104
2.8126
2.2118
2.2106
3.953
2.2177
2.2136
1.1120
1.6104
1.7115
2.2106
1.7123
2.896
1.1111
2.894
1.7114
2.296
1.1103
1.7100
5.083
1.6126
1.7106
2.2126
2.2126
2.2118
5.583
2.2111
2.2122
3.991
2.2103
1.1104
1.7104
2.2118
1.1121
1.694
3.950
1.7118
1.7120
1.1106
1.1104
1.7120
1.796
5.674
1.1119
1.6122
1.1114
1.2106
0.675
1.1114
1.7103
1.1118
1.1123
1.196
1.1106
7.266
2.394
2.394
2.894
1.2104
5.675
4.583
1.1111
1.794
2.794
1.1106
4.471
1.1106
3.991
1.6120
1.1106
6.756
0.6118
0.6118
3.950
5.074
1.1106
1.1106
1.1106
0.6106
2.291
0.6106
0.5115
1.1108
1.199
0.5106
0.6114
0.6114
1.167
2.294
1.167
0.6106
0.5106
3.883
1.1104
2.291
2.291
1.1126
0.6111
0.5104
0.6118
0.5114
1.794
2.291
3.478
0.5103
2.391
3.374
4.556
0.5118
0.6123
0.5104
0.5106
1.196
0.696
1.690
0.5114
1.794
1.794

Compared With Other Events

Station records per event
Station records in Cold outbreak in United States, 14 May to 11 June 2021 compared with similar events
Cold outbreak in United States and Mexico, 6 February to 5 March 202112,118 records
Cold outbreak in United States and Mexico, 13 October to 5 November 20209,841 records
Cold outbreak in United States and Mexico, 23 December 2017 to 8 January 20188,263 records
Cold outbreak in United States and Mexico, 3 to 23 January 20247,675 records
Cold outbreak in United States, 15 January to 10 February 20265,568 records
Cold outbreak in United States, 14 May to 11 June 2021 (this event)2,720 records

Every Record Set

20 of 2,720
Every record set or tied during Cold outbreak in United States, 14 May to 11 June 2021, in date order
DateStationRecordValueMarginYears stoodSignificance
2021-05-20ChoteauRecord low maximum temperature1.7 C (35.1 F)5.5 C (9.9 F)10349 of 100 (Notable)
2021-05-22ChesterRecord low maximum temperature0.6 C (33.1 F)7.2 C (13.0 F)11952 of 100 (Notable)
2021-05-22Gibson DamRecord low maximum temperature-2.2 C (28.0 F)7.8 C (14.0 F)9451 of 100 (Notable)
2021-05-22EnnisRecord low maximum temperature-0.6 C (30.9 F)7.3 C (13.1 F)9450 of 100 (Notable)
2021-05-29KnoxvilleRecord low maximum temperature8.3 C (46.9 F)6.7 C (12.1 F)9450 of 100 (Notable)
2021-05-29Monroe CityRecord low maximum temperature11.1 C (52.0 F)5.6 C (10.1 F)11450 of 100 (Notable)
2021-05-30Mt SterlingRecord low maximum temperature11.1 C (52.0 F)6.7 C (12.1 F)12053 of 100 (Notable)
2021-05-30RussellvilleRecord low maximum temperature12.8 C (55.0 F)6.6 C (11.9 F)12653 of 100 (Notable)
2021-05-30Phoenixville 1 ERecord low maximum temperature11.1 C (52.0 F)5.6 C (10.1 F)10651 of 100 (Notable)
2021-05-30HernandoRecord low maximum temperature15.6 C (60.1 F)4.4 C (7.9 F)11250 of 100 (Notable)
2021-05-30WynneRecord low maximum temperature16.1 C (61.0 F)5.0 C (9.0 F)9149 of 100 (Notable)
2021-05-30Newark Ag FarmRecord low maximum temperature11.1 C (52.0 F)7.2 C (13.0 F)8049 of 100 (Notable)
2021-05-30SalemRecord low maximum temperature12.8 C (55.0 F)4.4 C (7.9 F)10649 of 100 (Notable)
2021-05-30KingstonRecord low maximum temperature10.0 C (50.0 F)4.4 C (7.9 F)10649 of 100 (Notable)
2021-05-31Rogersville 1 NERecord low maximum temperature15.6 C (60.1 F)5.0 C (9.0 F)11152 of 100 (Notable)
2021-05-31QuicksandRecord low maximum temperature14.4 C (57.9 F)7.8 C (14.0 F)9151 of 100 (Notable)
2021-06-01FairfieldRecord low maximum temperature14.4 C (57.9 F)3.9 C (7.0 F)10449 of 100 (Notable)
2021-06-02Alicia 2 NNERecord low maximum temperature18.3 C (64.9 F)2.3 C (4.1 F)10756 of 100 (Notable)
2021-06-02NewportRecord low maximum temperature18.3 C (64.9 F)0.6 C (1.1 F)13151 of 100 (Notable)
2021-06-02Calico Rock 2 WSWRecord low maximum temperature17.8 C (64.0 F)1.1 C (2.0 F)8548 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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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 2026-10-17. Events are found by this site from station records and are not official designations. Records are provisional until reprocessed.