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Data as of 2026-10-18
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Built 2026-10-19 (19 October 2026)

Cold outbreak in United States, 1 to 13 April 2021

Cold outbreak in United States, 1 to 13 April 2021: 251 records at 65 stations, peak on 10 April 2021. Closed.

Data as of . Last revised (2026-10-18).

Key Facts

  • Cold outbreak in United States, 1 to 13 April 2021 set or tied 251 station records at 65 stations.
  • It ran from 1 April 2021 to 13 April 2021 (13 days) and its peak day was 10 April 2021.
  • Status: closed.
  • Haines AP set a daily record low minimum temperature of -12.1 C (10.2 F) on 11 April 2021.
  • The busiest day was 9 April 2021 with 68 records.
  • The oldest broken record in the ranked list had stood for 118 years.

Footprint

1 to 13 April 2021
Footprint of Cold outbreak in United States, 1 to 13 April 2021 The area covered by Cold outbreak in United States, 1 to 13 April 2021 is outlined, with 12 of the stations that set records marked, coloured by record type.
The area covered by Cold outbreak in United States, 1 to 13 April 2021 is outlined, with 12 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Cold outbreak in United States, 1 to 13 April 2021: stations that set records in the event
StationTypeValueDate
Haines APRecord low minimum temperature-12.1 C (10.2 F)2021-04-11
SkagwayRecord low minimum temperature-9.4 C (15.1 F)2021-04-11
Big Delta APRecord low minimum temperature-32.7 C (-26.9 F)2021-04-10
Tanana APRecord low maximum temperature-14.9 C (5.2 F)2021-04-08
University Exp STNRecord low maximum temperature-15.6 C (3.9 F)2021-04-10
WisemanRecord low minimum temperature-36.1 C (-33.0 F)2021-04-10
Seward APRecord low maximum temperature-4.9 C (23.2 F)2021-04-09
Kenai APRecord low maximum temperature-7.1 C (19.2 F)2021-04-09
Circle Hot SpringsRecord low minimum temperature-36.1 C (-33.0 F)2021-04-10
Ketchikan APRecord low maximum temperature3.9 C (39.0 F)2021-04-08
Nenana Muni APRecord low minimum temperature-32.7 C (-26.9 F)2021-04-06
Fairbanks Intl APRecord low minimum temperature-33.8 C (-28.8 F)2021-04-10

Records per Day

Peak day 62
Records per day during Cold outbreak in United States, 1 to 13 April 2021 Records set or tied each day from 1 April 2021 to 13 April 2021. The most in one day was 68 on 9 April 2021. 0 20 40 60 80 04-0104-0304-0504-0704-0904-1104-13
Records set or tied each day from 1 April 2021 to 13 April 2021. The most in one day was 68 on 9 April 2021.
Records per day during Cold outbreak in United States, 1 to 13 April 2021
DateRecords
2021-04-015
2021-04-0213
2021-04-031
2021-04-041
2021-04-059
2021-04-0617
2021-04-0715
2021-04-0823
2021-04-0968
2021-04-1062
2021-04-1124
2021-04-1212
2021-04-131

Top Records by Margin

Margin over the record replaced
Top records of Cold outbreak in United States, 1 to 13 April 2021 ranked by margin
Big Delta AP, 04-1010.5 C (18.9 F)
Haines AP, 04-118.8 C (15.8 F)
Wiseman, 04-108.3 C (14.9 F)
Fairbanks Intl AP, 04-107.7 C (13.9 F)
Haines AP, 04-107.2 C (13.0 F)
Big Delta AP, 04-067.1 C (12.8 F)
Haines AP, 04-106.0 C (10.8 F)
Tanana AP, 04-084.3 C (7.7 F)
University Exp STN, 04-103.9 C (7.0 F)
Circle Hot Springs, 04-123.9 C (7.0 F)
Wiseman, 04-113.4 C (6.1 F)
Skagway, 04-113.3 C (5.9 F)
Skagway, 04-102.2 C (4.0 F)
Skagway, 04-091.7 C (3.1 F)
Skagway, 04-121.6 C (2.9 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, 1 to 13 April 2021 251 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 30 60 90 120 0.03.06.09.012.0 Margin (C) Years the old record stood
251 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, 1 to 13 April 2021
Margin (C)Years the old record stood
8.891
6.091
3.396
7.271
10.575
3.9110
4.3118
2.2118
8.384
1.7118
1.6115
1.6110
0.585
1.5118
7.176
0.5104
3.484
7.766
0.596
3.984
5.660
2.771
1.675
0.565
2.271
2.872
1.178
3.352
3.952
2.868
1.072
1.167
4.452
7.88
8.912
3.352
1.167
2.752
5.466
1.768
8.335
1.035
4.550
4.950
2.235
6.135
6.148
10.08
3.950
3.950
3.935
3.835
1.035
0.648
0.635
2.240
2.835
1.136
8.920
6.719
1.435
1.335
2.135
2.233
5.08
5.435
4.936
4.936
2.350
2.726
4.017
0.835
3.912
4.435
3.435
7.88
6.222
1.720
5.035
1.135
4.217
2.136
2.835
0.550
3.936
2.836
5.028
1.61
5.635
10.08
6.428
0.435
1.535
5.619
2.248
2.318
4.68
2.835
0.650
3.30
5.935
3.38
2.135
1.636
6.17
1.140
0.550
8.38
3.319
5.08
4.40
5.68
1.636
0.535
1.636
3.88
2.136
2.212
1.735
5.58
0.644
1.635
4.519
2.835
1.636
1.635
6.18
3.37
4.40
3.635
0.635
5.58
1.135
3.98
3.922
0.540
0.60
2.336
2.835
1.135
3.98
1.712
0.617
5.028
0.435
0.435
0.535
1.135
0.635
5.07
3.918
3.38
2.218
1.68
3.628
2.436
1.28
3.98
0.535
0.535
1.612
0.535
6.78
0.619
8.37
6.78
3.624
0.37
1.336
1.136
4.38
1.78
2.312
0.635
0.628
2.228
1.735
3.324
0.639
5.98
0.139
2.620
2.622
1.18
1.112
1.111
3.412
0.50
2.38
2.28
1.122
0.612
0.612
2.218
1.128
1.711
2.78
0.68
1.728
0.60

Compared With Other Events

Station records per event
Station records in Cold outbreak in United States, 1 to 13 April 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, 1 to 13 April 2021 (this event)251 records

Every Record Set

20 of 251
Every record set or tied during Cold outbreak in United States, 1 to 13 April 2021, in date order
DateStationRecordValueMarginYears stoodSignificance
2021-04-06Big Delta APRecord low minimum temperature-34.3 C (-29.7 F)7.1 C (12.8 F)7642 of 100 (Notable)
2021-04-06Nenana Muni APRecord low minimum temperature-32.7 C (-26.9 F)0.5 C (0.9 F)9639 of 100 (Notable)
2021-04-08Tanana APRecord low maximum temperature-14.9 C (5.2 F)4.3 C (7.7 F)11846 of 100 (Notable)
2021-04-08Ketchikan APRecord low maximum temperature3.9 C (39.0 F)0.5 C (0.9 F)10441 of 100 (Notable)
2021-04-09SkagwayRecord low maximum temperature-0.6 C (30.9 F)1.7 C (3.1 F)11844 of 100 (Notable)
2021-04-09Seward APRecord low maximum temperature-4.9 C (23.2 F)1.6 C (2.9 F)11044 of 100 (Notable)
2021-04-09Kenai APRecord low maximum temperature-7.1 C (19.2 F)1.5 C (2.7 F)11843 of 100 (Notable)
2021-04-10Haines APRecord low minimum temperature-9.3 C (15.3 F)6.0 C (10.8 F)9156 of 100 (Notable)
2021-04-10Haines APRecord low maximum temperature-5.5 C (22.1 F)7.2 C (13.0 F)7148 of 100 (Notable)
2021-04-10Big Delta APRecord low minimum temperature-32.7 C (-26.9 F)10.5 C (18.9 F)7547 of 100 (Notable)
2021-04-10University Exp STNRecord low maximum temperature-15.6 C (3.9 F)3.9 C (7.0 F)11046 of 100 (Notable)
2021-04-10SkagwayRecord low maximum temperature1.7 C (35.1 F)2.2 C (4.0 F)11845 of 100 (Notable)
2021-04-10WisemanRecord low minimum temperature-36.1 C (-33.0 F)8.3 C (14.9 F)8445 of 100 (Notable)
2021-04-10Circle Hot SpringsRecord low minimum temperature-36.1 C (-33.0 F)0.5 C (0.9 F)8543 of 100 (Notable)
2021-04-10Fairbanks Intl APRecord low minimum temperature-33.8 C (-28.8 F)7.7 C (13.9 F)6639 of 100 (Notable)
2021-04-11Haines APRecord low minimum temperature-12.1 C (10.2 F)8.8 C (15.8 F)9165 of 100 (Major)
2021-04-11SkagwayRecord low minimum temperature-9.4 C (15.1 F)3.3 C (5.9 F)9648 of 100 (Notable)
2021-04-11WisemanRecord low minimum temperature-32.8 C (-27.0 F)3.4 C (6.1 F)8439 of 100 (Notable)
2021-04-12SkagwayRecord low maximum temperature2.8 C (37.0 F)1.6 C (2.9 F)11544 of 100 (Notable)
2021-04-12Circle Hot SpringsRecord low minimum temperature-30.6 C (-23.1 F)3.9 C (7.0 F)8438 of 100 (Notable)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 251 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 2026-10-18. Events are found by this site from station records and are not official designations. Records are provisional until reprocessed.