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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, 20 to 23 December 2018

Heat wave in United States, 20 to 23 December 2018: 197 records at 154 stations, peak on 21 December 2018. Closed.

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

Key Facts

  • Heat wave in United States, 20 to 23 December 2018 set or tied 197 station records at 154 stations.
  • It ran from 20 December 2018 to 23 December 2018 (4 days) and its peak day was 21 December 2018.
  • Status: closed.
  • Middleboro set a daily record high minimum temperature of 10.0 C (50.0 F) on 22 December 2018.
  • The busiest day was 21 December 2018 with 100 records.
  • The oldest broken record in the ranked list had stood for 122 years.

Footprint

20 to 23 December 2018
Footprint of Heat wave in United States, 20 to 23 December 2018 The area covered by Heat wave in United States, 20 to 23 December 2018 is outlined, with 20 of the stations that set records marked, coloured by record type.
The area covered by Heat wave in United States, 20 to 23 December 2018 is outlined, with 20 of the stations that set records marked, coloured by record type. Made with Natural Earth.
Footprint of Heat wave in United States, 20 to 23 December 2018: stations that set records in the event
StationTypeValueDate
MiddleboroRecord high minimum temperature10.0 C (50.0 F)2018-12-22
Warsaw 2 NWRecord high minimum temperature11.7 C (53.1 F)2018-12-21
Indian Lake 2SWRecord high maximum temperature10.6 C (51.1 F)2018-12-22
Hightstown 2 WRecord high maximum temperature18.3 C (64.9 F)2018-12-21
Phoenixville 1 ERecord high maximum temperature17.8 C (64.0 F)2018-12-20
Hagerstown 1ERecord high maximum temperature18.9 C (66.0 F)2018-12-21
Mohonk LakeRecord high maximum temperature13.9 C (57.0 F)2018-12-21
E StroudsburgRecord high minimum temperature8.3 C (46.9 F)2018-12-21
HamburgRecord high maximum temperature16.7 C (62.1 F)2018-12-22
KingstonRecord high maximum temperature16.1 C (61.0 F)2018-12-21
Atlantic City MarinaRecord high minimum temperature11.1 C (52.0 F)2018-12-21
NE Phila APRecord high minimum temperature13.3 C (55.9 F)2018-12-21
Millinocket Muni APRecord high maximum temperature11.7 C (53.1 F)2018-12-21
LowellRecord high maximum temperature18.3 C (64.9 F)2018-12-22
AuburnRecord high maximum temperature17.8 C (64.0 F)2018-12-22
Williamsport Rgnl APRecord high maximum temperature17.8 C (64.0 F)2018-12-21
StorrsRecord high minimum temperature10.0 C (50.0 F)2018-12-22
Brassua DamRecord high minimum temperature1.7 C (35.1 F)2018-12-22
MiddletonRecord high minimum temperature10.6 C (51.1 F)2018-12-22
RutlandRecord high minimum temperature7.8 C (46.0 F)2018-12-22

Records per Day

Peak day 100
Records per day during Heat wave in United States, 20 to 23 December 2018 Records set or tied each day from 20 December 2018 to 23 December 2018. The most in one day was 100 on 21 December 2018. 0 25 50 75 100 12-2012-2112-2212-23
Records set or tied each day from 20 December 2018 to 23 December 2018. The most in one day was 100 on 21 December 2018.
Records per day during Heat wave in United States, 20 to 23 December 2018
DateRecords
2018-12-205
2018-12-21100
2018-12-2288
2018-12-234

Top Records by Margin

Margin over the record replaced
Top records of Heat wave in United States, 20 to 23 December 2018 ranked by margin
NE Phila AP, 12-216.1 C (11.0 F)
Millinocket Muni AP, 12-215.6 C (10.1 F)
Rutland, 12-224.5 C (8.1 F)
Williamsport Rgnl AP, 12-214.5 C (8.1 F)
E Stroudsburg, 12-213.9 C (7.0 F)
Middleton, 12-223.9 C (7.0 F)
Middleboro, 12-223.3 C (5.9 F)
Auburn, 12-222.8 C (5.0 F)
Storrs, 12-222.8 C (5.0 F)
Lowell, 12-222.7 C (4.9 F)
Warsaw 2 NW, 12-211.1 C (2.0 F)
Indian Lake 2SW, 12-220.6 C (1.1 F)
Hagerstown 1E, 12-210.6 C (1.1 F)
Mohonk Lake, 12-210.6 C (1.1 F)
Hamburg, 12-220.6 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, 20 to 23 December 2018 197 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
197 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, 20 to 23 December 2018
Margin (C)Years the old record stood
3.3122
0.6112
1.1122
0.5122
0.695
0.695
0.695
0.693
3.979
0.595
0.595
6.160
5.667
2.768
2.868
2.868
0.685
3.968
4.560
4.564
2.868
2.768
2.268
2.268
1.768
3.960
1.168
3.460
1.264
0.668
2.868
3.960
1.661
0.668
1.760
2.860
1.160
1.668
0.660
4.551
0.660
2.760
1.760
1.764
0.668
1.160
5.629
1.660
1.760
0.660
2.360
0.660
2.344
1.660
1.660
1.160
3.951
1.160
1.160
2.344
0.560
3.351
1.251
5.544
1.160
0.660
0.560
0.661
7.824
3.944
1.160
2.351
1.151
0.644
3.929
2.247
0.644
2.844
5.020
7.320
5.520
1.744
1.651
4.520
2.344
3.929
2.244
2.244
2.744
1.728
2.340
1.724
5.65
4.529
0.644
1.144
1.629
0.629
0.644
1.720
0.644
0.533
3.94
3.328
2.816
2.316
2.220
4.47
2.820
0.524
6.14
0.620
1.628
2.220
0.524
1.129
2.224
3.324
1.628
3.928
0.529
1.124
4.54
5.04
1.128
1.729
3.424
2.324
5.54
3.328
1.624
1.129
1.120
2.220
0.528
1.624
2.224
0.628
2.719
1.74
1.74
2.220
2.228
0.631
1.124
1.24
1.74
0.529
1.716
1.14
2.819
3.94
3.34
1.74
0.624
0.516
2.74
3.93
2.84
1.129
3.44
1.14
2.816
0.529
3.34
1.77
2.84
3.34
0.520
0.54
2.84
0.67
2.24
2.34
0.67
1.74
2.35
1.116
1.116
2.34
1.74
0.67
1.74
1.116
1.75
1.64
1.65
0.616
1.14
1.74
0.65
0.64
0.60
1.64
1.24
0.54
1.14

Compared With Other Events

Station records per event
Station records in Heat wave in United States, 20 to 23 December 2018 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, 20 to 23 December 2018 (this event)197 records

Every Record Set

20 of 197
Every record set or tied during Heat wave in United States, 20 to 23 December 2018, in date order
DateStationRecordValueMarginYears stoodSignificance
2018-12-20Phoenixville 1 ERecord high maximum temperature17.8 C (64.0 F)0.6 C (1.1 F)9339 of 100 (Notable)
2018-12-21Warsaw 2 NWRecord high minimum temperature11.7 C (53.1 F)1.1 C (2.0 F)12241 of 100 (Notable)
2018-12-21Hightstown 2 WRecord high maximum temperature18.3 C (64.9 F)0.5 C (0.9 F)12240 of 100 (Notable)
2018-12-21Hagerstown 1ERecord high maximum temperature18.9 C (66.0 F)0.6 C (1.1 F)9539 of 100 (Notable)
2018-12-21Mohonk LakeRecord high maximum temperature13.9 C (57.0 F)0.6 C (1.1 F)9539 of 100 (Notable)
2018-12-21E StroudsburgRecord high minimum temperature8.3 C (46.9 F)3.9 C (7.0 F)7939 of 100 (Notable)
2018-12-21KingstonRecord high maximum temperature16.1 C (61.0 F)0.5 C (0.9 F)9538 of 100 (Notable)
2018-12-21Atlantic City MarinaRecord high minimum temperature11.1 C (52.0 F)0.5 C (0.9 F)9538 of 100 (Notable)
2018-12-21NE Phila APRecord high minimum temperature13.3 C (55.9 F)6.1 C (11.0 F)6037 of 100 (Notable)
2018-12-21Millinocket Muni APRecord high maximum temperature11.7 C (53.1 F)5.6 C (10.1 F)6736 of 100 (Notable)
2018-12-21Williamsport Rgnl APRecord high maximum temperature17.8 C (64.0 F)4.5 C (8.1 F)6434 of 100 (Routine)
2018-12-22MiddleboroRecord high minimum temperature10.0 C (50.0 F)3.3 C (5.9 F)12245 of 100 (Notable)
2018-12-22Indian Lake 2SWRecord high maximum temperature10.6 C (51.1 F)0.6 C (1.1 F)11241 of 100 (Notable)
2018-12-22HamburgRecord high maximum temperature16.7 C (62.1 F)0.6 C (1.1 F)9539 of 100 (Notable)
2018-12-22LowellRecord high maximum temperature18.3 C (64.9 F)2.7 C (4.9 F)6835 of 100 (Notable)
2018-12-22AuburnRecord high maximum temperature17.8 C (64.0 F)2.8 C (5.0 F)6835 of 100 (Notable)
2018-12-22StorrsRecord high minimum temperature10.0 C (50.0 F)2.8 C (5.0 F)6834 of 100 (Routine)
2018-12-22Brassua DamRecord high minimum temperature1.7 C (35.1 F)0.6 C (1.1 F)8534 of 100 (Routine)
2018-12-22MiddletonRecord high minimum temperature10.6 C (51.1 F)3.9 C (7.0 F)6834 of 100 (Routine)
2018-12-22RutlandRecord high minimum temperature7.8 C (46.0 F)4.5 C (8.1 F)6034 of 100 (Routine)

The daily ledgers keep a limited number of records per day, so this list has 20 of the 197 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.