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

Heat wave in United States, 28 December 2019 to 9 January 2020

Heat wave in United States, 28 December 2019 to 9 January 2020: 326 records at 235 stations, peak on 3 January 2020. Closed.

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

Key Facts

  • Heat wave in United States, 28 December 2019 to 9 January 2020 set or tied 326 station records at 235 stations.
  • It ran from 28 December 2019 to 9 January 2020 (13 days) and its peak day was 3 January 2020.
  • Status: closed.
  • Winthrop 1 WSW set a monthly record high minimum temperature of 2.2 C (36.0 F) on 2 January 2020.
  • The busiest day was 1 January 2020 with 89 records.
  • The oldest broken record in the ranked list had stood for 117 years.

Footprint

28 December 2019 to 9 January 2020
Footprint of Heat wave in United States, 28 December 2019 to 9 January 2020 The area covered by Heat wave in United States, 28 December 2019 to 9 January 2020 is outlined, with 18 of the stations that set records marked, coloured by record type.
The area covered by Heat wave in United States, 28 December 2019 to 9 January 2020 is outlined, with 18 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Heat wave in United States, 28 December 2019 to 9 January 2020: stations that set records in the event
StationTypeValueDate
Winthrop 1 WSWRecord high minimum temperature2.2 C (36.0 F)2020-01-02
Grizzly PeakRecord high maximum temperature19.5 C (67.1 F)2020-01-02
EmblemRecord high maximum temperature11.7 C (53.1 F)2020-01-04
GlendiveRecord high minimum temperature2.2 C (36.0 F)2020-01-01
ClearbrookRecord high maximum temperature15.6 C (60.1 F)2020-01-03
BendRecord high maximum temperature14.4 C (57.9 F)2020-01-04
BremertonRecord high maximum temperature12.8 C (55.0 F)2020-01-02
N Bend SW Oregon Rgnl APRecord high maximum temperature17.2 C (63.0 F)2020-01-03
RepublicRecord high maximum temperature8.9 C (48.0 F)2020-01-04
ChinookRecord high minimum temperature2.2 C (36.0 F)2020-01-01
PlevnaRecord high minimum temperature-0.6 C (30.9 F)2020-01-01
Roseburg Rgnl APRecord high maximum temperature16.1 C (61.0 F)2020-01-03
WilburRecord high minimum temperature1.7 C (35.1 F)2020-01-04
Hot SpringsRecord high minimum temperature1.7 C (35.1 F)2020-01-06
KennewickRecord high minimum temperature7.8 C (46.0 F)2020-01-02
DeaverRecord high maximum temperature12.2 C (54.0 F)2020-01-05
EllensburgRecord high maximum temperature10.0 C (50.0 F)2020-01-02
HartlineRecord high minimum temperature1.7 C (35.1 F)2020-01-07

Records per Day

Peak day 88
Records per day during Heat wave in United States, 28 December 2019 to 9 January 2020 Records set or tied each day from 28 December 2019 to 9 January 2020. The most in one day was 89 on 1 January 2020. 0 25 50 75 100 12-2812-3001-0101-0301-0501-0701-09
Records set or tied each day from 28 December 2019 to 9 January 2020. The most in one day was 89 on 1 January 2020.
Records per day during Heat wave in United States, 28 December 2019 to 9 January 2020
DateRecords
2019-12-281
2019-12-296
2019-12-303
2019-12-3121
2020-01-0189
2020-01-0238
2020-01-0388
2020-01-0439
2020-01-059
2020-01-068
2020-01-0714
2020-01-087
2020-01-093

Top Records by Margin

Margin over the record replaced
Top records of Heat wave in United States, 28 December 2019 to 9 January 2020 ranked by margin
Grizzly Peak, 01-0211.2 C (20.2 F)
Emblem, 01-043.4 C (6.1 F)
Glendive, 01-013.3 C (5.9 F)
Roseburg Rgnl AP, 01-032.2 C (4.0 F)
Deaver, 01-052.2 C (4.0 F)
Clearbrook, 01-031.2 C (2.2 F)
Winthrop 1 WSW, 01-021.1 C (2.0 F)
Bend, 01-041.1 C (2.0 F)
Hot Springs, 01-061.1 C (2.0 F)
Ellensburg, 01-021.1 C (2.0 F)
Hartline, 01-071.1 C (2.0 F)
Bremerton, 01-020.6 C (1.1 F)
Republic, 01-040.6 C (1.1 F)
Wilbur, 01-040.6 C (1.1 F)
Kennewick, 01-020.6 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 Heat wave in United States, 28 December 2019 to 9 January 2020 326 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
326 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 Heat wave in United States, 28 December 2019 to 9 January 2020
Margin (C)Years the old record stood
1.1105
3.4104
11.233
3.3101
1.1112
1.2105
0.6117
0.6105
0.5117
0.5101
0.5101
1.198
0.6105
2.285
0.698
2.292
1.186
0.588
0.584
1.186
1.180
1.180
0.673
1.176
2.268
1.673
3.372
4.556
1.765
1.656
1.165
3.936
1.761
2.260
0.565
1.160
3.356
0.656
2.256
0.564
0.666
1.752
1.656
9.628
0.568
1.156
1.156
0.556
1.157
1.160
0.656
2.836
0.568
1.756
0.556
1.156
1.648
2.256
1.757
1.156
1.753
1.757
1.754
1.756
3.336
8.028
0.656
1.156
1.727
1.736
1.756
0.656
2.836
1.140
2.256
6.132
0.657
1.652
0.652
2.248
7.712
2.336
5.024
3.332
1.150
1.136
0.556
2.248
0.656
2.244
5.622
1.136
2.238
1.730
0.536
0.644
0.636
1.636
1.142
1.638
1.236
3.918
2.832
1.136
2.225
2.838
1.730
2.236
1.138
1.729
4.417
0.638
3.425
1.136
1.140
0.624
1.141
1.736
0.528
0.536
0.536
4.918
1.138
0.530
0.530
0.530
1.130
0.536
1.233
1.122
1.136
1.116
0.638
0.638
2.213
2.212
1.136
1.222
2.830
5.68
3.016
0.536
0.638
1.128
0.538
0.538
0.638
1.132
1.136
0.538
1.80
3.222
1.129
1.716
1.125
2.822
1.121
0.525
2.316
0.532
1.624
0.636
2.822
4.118
4.118
2.022
1.722
0.610
2.818
2.222
2.822
3.325
1.625
2.829
0.629
1.622
1.621
1.221
1.232
2.210
1.121
1.222
1.121
2.821
0.632
1.68
1.125
2.817
0.620
2.216
0.630
2.813
2.222
5.41
0.50
2.320
2.022
1.716
2.210
2.28

Compared With Other Events

Station records per event
Station records in Heat wave in United States, 28 December 2019 to 9 January 2020 compared with similar events
Heat wave in United States and Mexico, 16 January to 14 February 20249,869 records
Heat wave in United States, 28 January to 24 February 20266,528 records
Heat wave in United States and Mexico, 24 May to 19 June 20205,047 records
Heat wave in United States and Mexico, 26 March to 17 April 20213,669 records
Heat wave in Germany and 49 other countries, 18 December 2021 to 15 January 20223,626 records
Heat wave in United States, 28 December 2019 to 9 January 2020 (this event)326 records

Every Record Set

20 of 326
Every record set or tied during Heat wave in United States, 28 December 2019 to 9 January 2020, in date order
DateStationRecordValueMarginYears stoodSignificance
2020-01-01GlendiveRecord high minimum temperature2.2 C (36.0 F)3.3 C (5.9 F)10143 of 100 (Notable)
2020-01-01ChinookRecord high minimum temperature2.2 C (36.0 F)0.5 C (0.9 F)10140 of 100 (Notable)
2020-01-01PlevnaRecord high minimum temperature-0.6 C (30.9 F)0.5 C (0.9 F)10140 of 100 (Notable)
2020-01-01Roseburg Rgnl APRecord high minimum temperature8.3 C (46.9 F)0.5 C (0.9 F)8837 of 100 (Notable)
2020-01-01ClearbrookRecord high minimum temperature8.3 C (46.9 F)0.5 C (0.9 F)8436 of 100 (Notable)
2020-01-02Winthrop 1 WSWRecord high minimum temperature2.2 C (36.0 F)1.1 C (2.0 F)10551 of 100 (Notable)
2020-01-02Grizzly PeakRecord high maximum temperature19.5 C (67.1 F)11.2 C (20.2 F)3344 of 100 (Notable)
2020-01-02BremertonRecord high maximum temperature12.8 C (55.0 F)0.6 C (1.1 F)11741 of 100 (Notable)
2020-01-02KennewickRecord high minimum temperature7.8 C (46.0 F)0.6 C (1.1 F)9839 of 100 (Notable)
2020-01-02EllensburgRecord high maximum temperature10.0 C (50.0 F)1.1 C (2.0 F)8638 of 100 (Notable)
2020-01-03ClearbrookRecord high maximum temperature15.6 C (60.1 F)1.2 C (2.2 F)10542 of 100 (Notable)
2020-01-03N Bend SW Oregon Rgnl APRecord high maximum temperature17.2 C (63.0 F)0.5 C (0.9 F)11741 of 100 (Notable)
2020-01-03Roseburg Rgnl APRecord high maximum temperature16.1 C (61.0 F)2.2 C (4.0 F)8540 of 100 (Notable)
2020-01-04EmblemRecord high maximum temperature11.7 C (53.1 F)3.4 C (6.1 F)10444 of 100 (Notable)
2020-01-04BendRecord high maximum temperature14.4 C (57.9 F)1.1 C (2.0 F)11242 of 100 (Notable)
2020-01-04RepublicRecord high maximum temperature8.9 C (48.0 F)0.6 C (1.1 F)10541 of 100 (Notable)
2020-01-04WilburRecord high minimum temperature1.7 C (35.1 F)0.6 C (1.1 F)10540 of 100 (Notable)
2020-01-05DeaverRecord high maximum temperature12.2 C (54.0 F)2.2 C (4.0 F)9239 of 100 (Notable)
2020-01-06Hot SpringsRecord high minimum temperature1.7 C (35.1 F)1.1 C (2.0 F)9840 of 100 (Notable)
2020-01-07HartlineRecord high minimum temperature1.7 C (35.1 F)1.1 C (2.0 F)8636 of 100 (Notable)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 326 records the event counts. The counts above use the full total.

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.