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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, 24 September to 4 October 2021

Cold outbreak in United States, 24 September to 4 October 2021: 312 records at 245 stations, peak on 29 September 2021. Closed.

Data as of . Last revised (2026-10-17).

Key Facts

  • Cold outbreak in United States, 24 September to 4 October 2021 set or tied 312 station records at 245 stations.
  • It ran from 24 September 2021 to 4 October 2021 (11 days) and its peak day was 29 September 2021.
  • Status: closed.
  • Quemado set a daily record low maximum temperature of 11.7 C (53.1 F) on 30 September 2021.
  • The busiest day was 29 September 2021 with 88 records.
  • The oldest broken record in the ranked list had stood for 127 years.

Footprint

24 September to 4 October 2021
Footprint of Cold outbreak in United States, 24 September to 4 October 2021 The area covered by Cold outbreak in United States, 24 September to 4 October 2021 is outlined, with 19 of the stations that set records marked, coloured by record type.
The area covered by Cold outbreak in United States, 24 September to 4 October 2021 is outlined, with 19 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Cold outbreak in United States, 24 September to 4 October 2021: stations that set records in the event
StationTypeValueDate
QuemadoRecord low maximum temperature11.7 C (53.1 F)2021-09-30
Saint JohnsRecord low maximum temperature17.2 C (63.0 F)2021-09-30
Saint IgnatiusRecord low minimum temperature-7.2 C (19.0 F)2021-10-01
ParadiseRecord low maximum temperature20.0 C (68.0 F)2021-10-02
ManassaRecord low maximum temperature11.1 C (52.0 F)2021-10-02
SpringervilleRecord low maximum temperature13.9 C (57.0 F)2021-09-27
StanleyRecord low minimum temperature-11.7 C (10.9 F)2021-09-30
VernalRecord low maximum temperature10.6 C (51.1 F)2021-09-30
Los AlamosRecord low maximum temperature12.2 C (54.0 F)2021-09-30
San SimonRecord low maximum temperature22.2 C (72.0 F)2021-09-30
Los Angeles Downtown/UscRecord low maximum temperature20.0 C (68.0 F)2021-09-27
Torrance APRecord low maximum temperature19.4 C (66.9 F)2021-09-26
Natural BrgRecord low maximum temperature18.9 C (66.0 F)2021-09-26
AlpineRecord low maximum temperature12.8 C (55.0 F)2021-09-27
Black Rvr PumpsRecord low maximum temperature16.7 C (62.1 F)2021-09-28
CubaRecord low maximum temperature10.6 C (51.1 F)2021-09-30
Minidoka DamRecord low minimum temperature-3.9 C (25.0 F)2021-09-30
McKenzie Rvr RsRecord low maximum temperature11.1 C (52.0 F)2021-09-28
Deming Muni APRecord low maximum temperature19.4 C (66.9 F)2021-09-30

Records per Day

Peak day 88
Records per day during Cold outbreak in United States, 24 September to 4 October 2021 Records set or tied each day from 24 September 2021 to 4 October 2021. The most in one day was 88 on 29 September 2021. 0 25 50 75 100 09-2409-2609-2809-3010-0210-04
Records set or tied each day from 24 September 2021 to 4 October 2021. The most in one day was 88 on 29 September 2021.
Records per day during Cold outbreak in United States, 24 September to 4 October 2021
DateRecords
2021-09-241
2021-09-253
2021-09-2614
2021-09-2747
2021-09-2824
2021-09-2988
2021-09-3078
2021-10-0147
2021-10-028
2021-10-031
2021-10-041

Top Records by Margin

Margin over the record replaced
Top records of Cold outbreak in United States, 24 September to 4 October 2021 ranked by margin
Quemado, 09-303.9 C (7.0 F)
Deming Muni AP, 09-303.9 C (7.0 F)
Black Rvr Pumps, 09-283.3 C (5.9 F)
Minidoka Dam, 09-302.8 C (5.0 F)
Saint Ignatius, 10-012.2 C (4.0 F)
Saint Johns, 09-301.7 C (3.1 F)
San Simon, 09-301.7 C (3.1 F)
Cuba, 09-301.6 C (2.9 F)
Torrance AP, 09-261.2 C (2.2 F)
Torrance AP, 09-271.2 C (2.2 F)
Paradise, 10-021.1 C (2.0 F)
Manassa, 10-021.1 C (2.0 F)
Los Alamos, 09-301.1 C (2.0 F)
McKenzie Rvr Rs, 09-281.1 C (2.0 F)
Stanley, 09-300.6 C (1.1 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, 24 September to 4 October 2021 312 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 38 75 113 150 0.02.04.06.08.0 Margin (C) Years the old record stood
312 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, 24 September to 4 October 2021
Margin (C)Years the old record stood
3.984
1.7108
2.296
1.1108
1.1127
0.5108
0.6100
0.5116
1.188
1.776
0.684
1.276
0.578
3.363
0.578
1.676
2.867
1.170
1.268
3.956
0.567
0.646
1.162
0.570
1.162
1.156
3.951
6.736
0.659
2.263
0.568
2.336
3.950
0.533
3.335
0.662
3.938
0.663
2.838
0.651
1.331
1.135
0.563
0.633
1.739
2.838
5.512
0.562
2.836
3.338
0.656
0.656
3.436
1.736
5.034
0.431
0.556
2.235
0.644
1.136
3.836
1.144
1.144
1.736
6.126
0.531
0.544
0.635
2.331
4.516
1.138
2.831
4.37
1.236
1.638
0.535
1.735
1.731
4.426
1.723
1.139
0.635
0.50
2.84
1.638
1.731
5.020
2.730
3.922
2.231
1.32
2.719
1.719
3.912
0.50
2.818
1.131
2.226
2.224
1.735
1.930
1.832
4.123
3.426
1.931
3.126
1.631
2.716
2.026
1.630
1.226
0.538
0.635
1.620
1.77
0.636
2.816
2.226
0.536
0.635
1.724
3.316
3.326
1.536
1.535
0.535
5.02
3.314
0.635
0.535
2.226
2.826
1.030
2.626
0.931
1.532
0.735
0.831
0.935
0.635
3.92
3.82
1.72
2.22
2.82
2.716
2.818
2.716
1.726
1.426
1.622
0.436
4.32
0.235
0.435
1.726
0.535
0.535
2.126
0.531
1.716
2.64
1.324
0.626
3.318
1.714
0.626
1.78
0.826
1.126
3.97
1.126
1.723
1.026
4.43
2.216
1.026
1.626
2.214
1.126
0.132
0.131
0.131
1.519
2.72
0.726
2.016
2.522
1.722
1.28
0.622
0.526
3.38
1.714
0.623
1.723
0.626
3.32
0.626
0.526

Compared With Other Events

Station records per event
Station records in Cold outbreak in United States, 24 September to 4 October 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, 24 September to 4 October 2021 (this event)312 records

Every Record Set

20 of 312
Every record set or tied during Cold outbreak in United States, 24 September to 4 October 2021, in date order
DateStationRecordValueMarginYears stoodSignificance
2021-09-26Torrance APRecord low maximum temperature19.4 C (66.9 F)1.2 C (2.2 F)7635 of 100 (Notable)
2021-09-26Natural BrgRecord low maximum temperature18.9 C (66.0 F)0.5 C (0.9 F)7834 of 100 (Routine)
2021-09-27SpringervilleRecord low maximum temperature13.9 C (57.0 F)0.5 C (0.9 F)10841 of 100 (Notable)
2021-09-27Los Angeles Downtown/UscRecord low maximum temperature20.0 C (68.0 F)0.6 C (1.1 F)8436 of 100 (Notable)
2021-09-27AlpineRecord low maximum temperature12.8 C (55.0 F)0.5 C (0.9 F)7834 of 100 (Routine)
2021-09-27Torrance APRecord low maximum temperature19.4 C (66.9 F)1.2 C (2.2 F)6832 of 100 (Routine)
2021-09-28Black Rvr PumpsRecord low maximum temperature16.7 C (62.1 F)3.3 C (5.9 F)6334 of 100 (Routine)
2021-09-28McKenzie Rvr RsRecord low maximum temperature11.1 C (52.0 F)1.1 C (2.0 F)7032 of 100 (Routine)
2021-09-30QuemadoRecord low maximum temperature11.7 C (53.1 F)3.9 C (7.0 F)8446 of 100 (Notable)
2021-09-30Saint JohnsRecord low maximum temperature17.2 C (63.0 F)1.7 C (3.1 F)10845 of 100 (Notable)
2021-09-30StanleyRecord low minimum temperature-11.7 C (10.9 F)0.6 C (1.1 F)10041 of 100 (Notable)
2021-09-30VernalRecord low maximum temperature10.6 C (51.1 F)0.5 C (0.9 F)11641 of 100 (Notable)
2021-09-30Los AlamosRecord low maximum temperature12.2 C (54.0 F)1.1 C (2.0 F)8838 of 100 (Notable)
2021-09-30San SimonRecord low maximum temperature22.2 C (72.0 F)1.7 C (3.1 F)7637 of 100 (Notable)
2021-09-30CubaRecord low maximum temperature10.6 C (51.1 F)1.6 C (2.9 F)7634 of 100 (Routine)
2021-09-30Minidoka DamRecord low minimum temperature-3.9 C (25.0 F)2.8 C (5.0 F)6733 of 100 (Routine)
2021-09-30Deming Muni APRecord low maximum temperature19.4 C (66.9 F)3.9 C (7.0 F)5632 of 100 (Routine)
2021-10-01Saint IgnatiusRecord low minimum temperature-7.2 C (19.0 F)2.2 C (4.0 F)9643 of 100 (Notable)
2021-10-02ParadiseRecord low maximum temperature20.0 C (68.0 F)1.1 C (2.0 F)10842 of 100 (Notable)
2021-10-02ManassaRecord low maximum temperature11.1 C (52.0 F)1.1 C (2.0 F)12742 of 100 (Notable)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 312 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.