Built 2026-10-15 (15 October 2026)

Wellsburg Wtr Trmt Pl Weather Records (USC00469368)

Record envelope, standing records and threshold days for Wellsburg Wtr Trmt Pl (USC00469368), West Virginia, United States, with 127 years of record.

Key Facts for Wellsburg Wtr Trmt Pl

  • Wellsburg Wtr Trmt Pl (USC00469368) is a weather station in West Virginia, United States at 40.28 latitude and -80.61 longitude, 201 m (660 ft) above sea level.
  • The station reports from 1878 to 2004, 127 years of record.
  • 1,464 records set at Wellsburg Wtr Trmt Pl still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Wellsburg Wtr Trmt Pl tied a daily record high minimum temperature of 21.7 C (71.1 F) on 30 August 2003.

About the Station

  • Location: West Virginia, United States, 40.28 latitude, -80.61 longitude.
  • Elevation: 201 m (660 ft).
  • Period of record: 1878 to 2004, 127 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record
Daily record high and record low at Wellsburg Wtr Trmt Pl, with 2026 drawn through them The band shows the record high and record low for each calendar day at Wellsburg Wtr Trmt Pl. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius. -40-200204060 JanFebMarAprMayJunJulAugSepOctNovDec
The band shows the record high and record low for each calendar day at Wellsburg Wtr Trmt Pl. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Wellsburg Wtr Trmt Pl, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan24.4 C (75.9 F)-31.7 C (-25.1 F)n/an/a
Feb25.0 C (77.0 F)-32.2 C (-26.0 F)n/an/a
Mar31.7 C (89.1 F)-23.9 C (-11.0 F)n/an/a
Apr33.3 C (91.9 F)-15.0 C (5.0 F)n/an/a
May35.6 C (96.1 F)-7.2 C (19.0 F)n/an/a
Jun37.8 C (100.0 F)-0.6 C (30.9 F)n/an/a
Jul41.1 C (106.0 F)3.3 C (37.9 F)n/an/a
Aug41.1 C (106.0 F)1.1 C (34.0 F)n/an/a
Sep39.4 C (102.9 F)-4.4 C (24.1 F)n/an/a
Oct32.8 C (91.0 F)-8.9 C (16.0 F)n/an/a
Nov30.0 C (86.0 F)-21.1 C (-6.0 F)n/an/a
Dec25.0 C (77.0 F)-27.2 C (-17.0 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Wellsburg Wtr Trmt Pl by the year they were set 1,464 records at Wellsburg Wtr Trmt Pl still stand. 1930 holds the most, with 40. 0102030401899: 21900: 221901: 241902: 141903: 311904: 191905: 141906: 131907: 131908: 121909: 191910: 121911: 211912: 181913: 151914: 301915: 151916: 141917: 241918: 151919: 101920: 141921: 91922: 81923: 81924: 91925: 221926: 131927: 251928: 91929: 181930: 401931: 221932: 281933: 211934: 331935: 131936: 321937: 151938: 131939: 201940: 131941: 201942: 171943: 161944: 71945: 211946: 131947: 191948: 211949: 101950: 241951: 151952: 211953: 151954: 181955: 121956: 131957: 151958: 101959: 101960: 121961: 81962: 171963: 311964: 211965: 131966: 151967: 71968: 81969: 61970: 71971: 91972: 151973: 161974: 141975: 71976: 131977: 181978: 91979: 91980: 91981: 71982: 191983: 121984: 141985: 131986: 121987: 101988: 171989: 61998: 61999: 102000: 132001: 102002: 112003: 11899190919191929193919491959196919791989
1,464 records at Wellsburg Wtr Trmt Pl still stand. 1930 holds the most, with 40.
Standing records at Wellsburg Wtr Trmt Pl by the year they were set
Year setStanding records
18992
190022
190124
190214
190331
190419
190514
190613
190713
190812
190919
191012
191121
191218
191315
191430
191515
191614
191724
191815
191910
192014
19219
19228
19238
19249
192522
192613
192725
19289
192918
193040
193122
193228
193321
193433
193513
193632
193715
193813
193920
194013
194120
194217
194316
19447
194521
194613
194719
194821
194910
195024
195115
195221
195315
195418
195512
195613
195715
195810
195910
196012
19618
196217
196331
196421
196513
196615
19677
19688
19696
19707
19719
197215
197316
197414
19757
197613
197718
19789
19799
19809
19817
198219
198312
198414
198513
198612
198710
198817
19896
19986
199910
200013
200110
200211
20031

All-Time Record Progression

3 new records
When Wellsburg Wtr Trmt Pl set new all-time records 3 all-time records were set at Wellsburg Wtr Trmt Pl between 27 February 1934 and 17 January 1977. Each dot is a new record. Record low minimum temperatureRecord daily snowfallRecord low maximum temperature27 February 1934: Record low minimum temperature -32.2 C (-26.0 F)25 November 1950: Record daily snowfall 61.0 cm (24.0 in)17 January 1977: Record low maximum temperature -16.7 C (1.9 F)1940195019601970
3 all-time records were set at Wellsburg Wtr Trmt Pl between 27 February 1934 and 17 January 1977. Each dot is a new record.
When Wellsburg Wtr Trmt Pl set new all-time records
DateKindDetail
1934-02-27Record low minimum temperatureRecord low minimum temperature -32.2 C (-26.0 F)
1950-11-25Record daily snowfallRecord daily snowfall 61.0 cm (24.0 in)
1977-01-17Record low maximum temperatureRecord low maximum temperature -16.7 C (1.9 F)

Wettest Day of Each Month

Sep: 157.5 mm (6.2 in)
Record daily precipitation for each month at Wellsburg Wtr Trmt Pl The wettest day on record for each calendar month at Wellsburg Wtr Trmt Pl. The most was 157.5 mm (6.2 in) on 30 September 1911. 050100150200 Jan: 50.8 mm (2.0 in), 9 January 1884 Jan Feb: 54.9 mm (2.2 in), 24 February 1975 Feb Mar: 62.0 mm (2.4 in), 6 March 1945 Mar Apr: 63.5 mm (2.5 in), 20 April 1901 Apr May: 74.9 mm (2.9 in), 6 May 1971 May Jun: 96.0 mm (3.8 in), 16 June 1920 Jun Jul: 94.0 mm (3.7 in), 22 July 1980 Jul Aug: 82.6 mm (3.3 in), 25 August 1879 Aug Sep: 157.5 mm (6.2 in), 30 September 1911 Sep Oct: 67.8 mm (2.7 in), 15 October 1954 Oct Nov: 73.7 mm (2.9 in), 17 November 1927 Nov Dec: 44.5 mm (1.8 in), 17 December 1927 Dec
The wettest day on record for each calendar month at Wellsburg Wtr Trmt Pl. The most was 157.5 mm (6.2 in) on 30 September 1911.
Record daily precipitation for each month at Wellsburg Wtr Trmt Pl
MonthRecord daily precipitation (mm)Date
Jan50.8 mm (2.0 in)9 January 1884
Feb54.9 mm (2.2 in)24 February 1975
Mar62.0 mm (2.4 in)6 March 1945
Apr63.5 mm (2.5 in)20 April 1901
May74.9 mm (2.9 in)6 May 1971
Jun96.0 mm (3.8 in)16 June 1920
Jul94.0 mm (3.7 in)22 July 1980
Aug82.6 mm (3.3 in)25 August 1879
Sep157.5 mm (6.2 in)30 September 1911
Oct67.8 mm (2.7 in)15 October 1954
Nov73.7 mm (2.9 in)17 November 1927
Dec44.5 mm (1.8 in)17 December 1927

Period of Record Coverage

1899 to 2004
Days with data per year at Wellsburg Wtr Trmt Pl 98 years of record at Wellsburg Wtr Trmt Pl, 1899 to 2004. 17 years have data for under 90 percent of days and are left out of rankings: 1899, 1917, 1918, 1973, 1983, 1984, 1985, 1986 and others. 1899: 61 of 365 days1900: 364 of 365 days1901: 359 of 365 days1902: 356 of 365 days1903: 362 of 365 days1904: 364 of 366 days1905: 353 of 365 days1906: 355 of 365 days1907: 350 of 365 days1908: 351 of 366 days1909: 334 of 365 days1910: 340 of 365 days1911: 363 of 365 days1912: 360 of 366 days1913: 358 of 365 days1914: 358 of 365 days1915: 364 of 365 days1916: 360 of 366 days1917: 273 of 365 days1918: 270 of 365 days1919: 354 of 365 days1920: 363 of 366 days1921: 364 of 365 days1922: 364 of 365 days1923: 364 of 365 days1924: 364 of 366 days1925: 362 of 365 days1926: 364 of 365 days1927: 362 of 365 days1928: 361 of 366 days1929: 360 of 365 days1930: 361 of 365 days1931: 360 of 365 days1932: 365 of 366 days1933: 361 of 365 days1934: 365 of 365 days1935: 364 of 365 days1936: 365 of 366 days1937: 362 of 365 days1938: 363 of 365 days1939: 361 of 365 days1940: 362 of 366 days1941: 362 of 365 days1942: 362 of 365 days1943: 361 of 365 days1944: 364 of 366 days1945: 360 of 365 days1946: 361 of 365 days1947: 361 of 365 days1948: 350 of 366 days1949: 365 of 365 days1950: 365 of 365 days1951: 364 of 365 days1952: 365 of 366 days1953: 365 of 365 days1954: 364 of 365 days1955: 364 of 365 days1956: 366 of 366 days1957: 364 of 365 days1958: 363 of 365 days1959: 364 of 365 days1960: 366 of 366 days1961: 364 of 365 days1962: 364 of 365 days1963: 363 of 365 days1964: 365 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 364 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 304 of 365 days1974: 365 of 365 days1975: 364 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 361 of 365 days1980: 359 of 366 days1981: 362 of 365 days1982: 346 of 365 days1983: 326 of 365 days1984: 305 of 366 days1985: 314 of 365 days1986: 324 of 365 days1987: 250 of 365 days1988: 262 of 366 days1989: 157 of 365 days1998: 59 of 365 days1999: 331 of 365 days2000: 209 of 366 days2001: 237 of 365 days2002: 225 of 365 days2003: 257 of 365 days2004: 83 of 366 days190519201935195019651980
98 years of record at Wellsburg Wtr Trmt Pl, 1899 to 2004. 17 years have data for under 90 percent of days and are left out of rankings: 1899, 1917, 1918, 1973, 1983, 1984, 1985, 1986 and others.
Days with data per year at Wellsburg Wtr Trmt Pl
YearDays with dataShare of yearComplete
18996117%No
1900364100%Yes
190135998%Yes
190235698%Yes
190336299%Yes
190436499%Yes
190535397%Yes
190635597%Yes
190735096%Yes
190835196%Yes
190933492%Yes
191034093%Yes
191136399%Yes
191236098%Yes
191335898%Yes
191435898%Yes
1915364100%Yes
191636098%Yes
191727375%No
191827074%No
191935497%Yes
192036399%Yes
1921364100%Yes
1922364100%Yes
1923364100%Yes
192436499%Yes
192536299%Yes
1926364100%Yes
192736299%Yes
192836199%Yes
192936099%Yes
193036199%Yes
193136099%Yes
1932365100%Yes
193336199%Yes
1934365100%Yes
1935364100%Yes
1936365100%Yes
193736299%Yes
193836399%Yes
193936199%Yes
194036299%Yes
194136299%Yes
194236299%Yes
194336199%Yes
194436499%Yes
194536099%Yes
194636199%Yes
194736199%Yes
194835096%Yes
1949365100%Yes
1950365100%Yes
1951364100%Yes
1952365100%Yes
1953365100%Yes
1954364100%Yes
1955364100%Yes
1956366100%Yes
1957364100%Yes
195836399%Yes
1959364100%Yes
1960366100%Yes
1961364100%Yes
1962364100%Yes
196336399%Yes
1964365100%Yes
1965365100%Yes
1966365100%Yes
1967364100%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
197330483%No
1974365100%Yes
1975364100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
197936199%Yes
198035998%Yes
198136299%Yes
198234695%Yes
198332689%No
198430583%No
198531486%No
198632489%No
198725068%No
198826272%No
198915743%No
19985916%No
199933191%Yes
200020957%No
200123765%No
200222562%No
200325770%No
20048323%No

Latest Records

20
Latest records at Wellsburg Wtr Trmt Pl
DateStationRecordValueBeat old record byOld record stoodSignificance
30 August 2003Wellsburg Wtr Trmt Pl, USdaily high min (Tie)21.7 C (71.1 F)tie29 years4 of 100 (Routine)
12 April 2003Wellsburg Wtr Trmt Pl, USdaily low max (Tie)5.6 C (42.1 F)tie96 years9 of 100 (Routine)
3 April 2003Wellsburg Wtr Trmt Pl, USdaily high min12.2 C (54.0 F)0.5 C (0.9 F)100 years40 of 100 (Notable)
17 February 2003Wellsburg Wtr Trmt Pl, USdaily snow depth35.6 cm (14.0 in)5.1 cm (2.0 in)100 years46 of 100 (Notable)
5 December 2002Wellsburg Wtr Trmt Pl, USdaily low max (Tie)-3.9 C (25.0 F)tie100 years10 of 100 (Routine)
19 August 2002Wellsburg Wtr Trmt Pl, USdaily high min (Tie)21.1 C (70.0 F)tie55 years6 of 100 (Routine)
18 August 2002Wellsburg Wtr Trmt Pl, USdaily high min (Tie)23.3 C (73.9 F)tie19 years3 of 100 (Routine)
17 August 2002Wellsburg Wtr Trmt Pl, USdaily high min24.4 C (75.9 F)0.5 C (0.9 F)100 years41 of 100 (Notable)
16 August 2002Wellsburg Wtr Trmt Pl, USdaily high min22.8 C (73.0 F)1.7 C (3.1 F)49 years28 of 100 (Routine)
12 August 2002Wellsburg Wtr Trmt Pl, USdaily high min (Tie)21.1 C (70.0 F)tie85 years8 of 100 (Routine)
29 July 2002Wellsburg Wtr Trmt Pl, USall-time high min (Tie)25.6 C (78.1 F)tie101 years15 of 100 (Routine)
27 July 2002Wellsburg Wtr Trmt Pl, USdaily high min22.8 C (73.0 F)0.6 C (1.1 F)28 years19 of 100 (Routine)
23 July 2002Wellsburg Wtr Trmt Pl, USdaily high min21.7 C (71.1 F)0.6 C (1.1 F)67 years31 of 100 (Routine)
13 June 2002Wellsburg Wtr Trmt Pl, USdaily high min (Tie)20.0 C (68.0 F)tie20 years4 of 100 (Routine)
22 May 2002Wellsburg Wtr Trmt Pl, USdaily low max11.1 C (52.0 F)4.5 C (8.1 F)40 years30 of 100 (Routine)
22 May 2002Wellsburg Wtr Trmt Pl, USdaily low min (Tie)-0.6 C (30.9 F)tie67 years7 of 100 (Routine)
21 May 2002Wellsburg Wtr Trmt Pl, USdaily low max10.6 C (51.1 F)2.2 C (4.0 F)95 years42 of 100 (Notable)
21 May 2002Wellsburg Wtr Trmt Pl, USdaily low min-0.6 C (30.9 F)1.2 C (2.2 F)52 years27 of 100 (Routine)
19 May 2002Wellsburg Wtr Trmt Pl, USdaily low max10.6 C (51.1 F)1.6 C (2.9 F)97 years42 of 100 (Notable)
12 May 2002Wellsburg Wtr Trmt Pl, USdaily high min (Tie)17.2 C (63.0 F)tie72 years7 of 100 (Routine)

Climate Trend

80 complete years, 1900 to 1986
Annual mean temperature at Wellsburg Wtr Trmt Pl as warming stripes, 1900 to 1986 One stripe for each of 80 complete years at Wellsburg Wtr Trmt Pl, 1900 to 1986. Blue stripes are years cooler than the station's own mean of 10.9 C (51.6 F); red stripes are warmer. The coolest year was 1904, at 9.0 C (48.2 F), and the warmest was 1921, at 12.5 C (54.6 F). The strongest colour marks a difference of 2.0 C (3.6 F). 1900: 11.1 C, +0.2 C from the station mean1901: 9.8 C, -1.1 C from the station mean1902: 10.1 C, -0.8 C from the station mean1903: 10.1 C, -0.8 C from the station mean1904: 9.0 C, -1.9 C from the station mean1905: 9.7 C, -1.2 C from the station mean1906: 10.7 C, -0.2 C from the station mean1908: 10.9 C, 0.0 C from the station mean1909: 10.5 C, -0.4 C from the station mean1910: 10.1 C, -0.8 C from the station mean1911: 11.3 C, +0.4 C from the station mean1912: 9.9 C, -1.0 C from the station mean1913: 11.1 C, +0.2 C from the station mean1914: 9.9 C, -0.9 C from the station mean1915: 10.1 C, -0.8 C from the station mean1916: 10.1 C, -0.7 C from the station mean1919: 11.4 C, +0.6 C from the station mean1920: 10.3 C, -0.6 C from the station mean1921: 12.5 C, +1.7 C from the station mean1922: 11.7 C, +0.8 C from the station mean1923: 11.0 C, +0.1 C from the station mean1924: 9.9 C, -1.0 C from the station mean1925: 10.8 C, 0.0 C from the station mean1926: 10.2 C, -0.7 C from the station mean1927: 11.1 C, +0.3 C from the station mean1928: 10.5 C, -0.4 C from the station mean1929: 10.5 C, -0.4 C from the station mean1930: 10.9 C, +0.1 C from the station mean1931: 12.2 C, +1.3 C from the station mean1932: 11.6 C, +0.7 C from the station mean1933: 11.7 C, +0.8 C from the station mean1934: 11.2 C, +0.3 C from the station mean1935: 11.1 C, +0.2 C from the station mean1936: 10.8 C, -0.1 C from the station mean1937: 10.7 C, -0.2 C from the station mean1938: 11.6 C, +0.7 C from the station mean1939: 11.3 C, +0.4 C from the station mean1940: 9.7 C, -1.1 C from the station mean1941: 11.2 C, +0.3 C from the station mean1942: 11.1 C, +0.2 C from the station mean1943: 10.5 C, -0.4 C from the station mean1944: 11.1 C, +0.3 C from the station mean1945: 10.9 C, +0.1 C from the station mean1946: 11.5 C, +0.7 C from the station mean1947: 11.0 C, +0.1 C from the station mean1948: 11.4 C, +0.5 C from the station mean1949: 12.4 C, +1.5 C from the station mean1950: 10.7 C, -0.2 C from the station mean1951: 11.0 C, +0.1 C from the station mean1952: 11.8 C, +0.9 C from the station mean1953: 12.0 C, +1.1 C from the station mean1954: 11.6 C, +0.7 C from the station mean1955: 11.5 C, +0.6 C from the station mean1956: 11.2 C, +0.3 C from the station mean1957: 11.4 C, +0.5 C from the station mean1958: 9.9 C, -1.0 C from the station mean1959: 11.5 C, +0.6 C from the station mean1960: 10.3 C, -0.6 C from the station mean1961: 10.8 C, -0.1 C from the station mean1962: 10.4 C, -0.5 C from the station mean1963: 9.7 C, -1.2 C from the station mean1964: 10.7 C, -0.2 C from the station mean1965: 10.9 C, 0.0 C from the station mean1966: 10.4 C, -0.5 C from the station mean1967: 10.7 C, -0.2 C from the station mean1968: 10.7 C, -0.2 C from the station mean1969: 10.6 C, -0.3 C from the station mean1970: 11.4 C, +0.5 C from the station mean1971: 11.2 C, +0.3 C from the station mean1972: 10.8 C, -0.1 C from the station mean1974: 11.6 C, +0.8 C from the station mean1975: 11.7 C, +0.8 C from the station mean1976: 10.1 C, -0.8 C from the station mean1977: 10.9 C, 0.0 C from the station mean1978: 10.3 C, -0.6 C from the station mean1980: 10.8 C, -0.1 C from the station mean1981: 10.8 C, -0.1 C from the station mean1982: 11.7 C, +0.8 C from the station mean1985: 11.3 C, +0.4 C from the station mean1986: 12.2 C, +1.3 C from the station mean190019101920193019401950196019701980
One stripe for each of 80 complete years at Wellsburg Wtr Trmt Pl, 1900 to 1986. Blue stripes are years cooler than the station's own mean of 10.9 C (51.6 F); red stripes are warmer. The coolest year was 1904, at 9.0 C (48.2 F), and the warmest was 1921, at 12.5 C (54.6 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Wellsburg Wtr Trmt Pl as warming stripes, 1900 to 1986
YearAnnual mean temperatureDifference from the station mean
190011.1 C+0.17 C
19019.8 C-1.10 C
190210.1 C-0.76 C
190310.1 C-0.78 C
19049.0 C-1.90 C
19059.7 C-1.19 C
190610.7 C-0.23 C
190810.9 C0.00 C
190910.5 C-0.43 C
191010.1 C-0.82 C
191111.3 C+0.45 C
19129.9 C-0.98 C
191311.1 C+0.20 C
19149.9 C-0.94 C
191510.1 C-0.76 C
191610.1 C-0.74 C
191911.4 C+0.56 C
192010.3 C-0.56 C
192112.5 C+1.66 C
192211.7 C+0.79 C
192311.0 C+0.09 C
19249.9 C-0.99 C
192510.8 C-0.04 C
192610.2 C-0.65 C
192711.1 C+0.26 C
192810.5 C-0.37 C
192910.5 C-0.39 C
193010.9 C+0.06 C
193112.2 C+1.30 C
193211.6 C+0.73 C
193311.7 C+0.85 C
193411.2 C+0.30 C
193511.1 C+0.17 C
193610.8 C-0.13 C
193710.7 C-0.16 C
193811.6 C+0.68 C
193911.3 C+0.45 C
19409.7 C-1.14 C
194111.2 C+0.32 C
194211.1 C+0.23 C
194310.5 C-0.42 C
194411.1 C+0.26 C
194510.9 C+0.06 C
194611.5 C+0.66 C
194711.0 C+0.11 C
194811.4 C+0.48 C
194912.4 C+1.48 C
195010.7 C-0.15 C
195111.0 C+0.09 C
195211.8 C+0.93 C
195312.0 C+1.10 C
195411.6 C+0.68 C
195511.5 C+0.62 C
195611.2 C+0.34 C
195711.4 C+0.54 C
19589.9 C-0.95 C
195911.5 C+0.63 C
196010.3 C-0.61 C
196110.8 C-0.06 C
196210.4 C-0.48 C
19639.7 C-1.18 C
196410.7 C-0.16 C
196510.9 C+0.04 C
196610.4 C-0.48 C
196710.7 C-0.20 C
196810.7 C-0.23 C
196910.6 C-0.30 C
197011.4 C+0.47 C
197111.2 C+0.34 C
197210.8 C-0.05 C
197411.6 C+0.76 C
197511.7 C+0.78 C
197610.1 C-0.81 C
197710.9 C+0.03 C
197810.3 C-0.62 C
198010.8 C-0.10 C
198110.8 C-0.05 C
198211.7 C+0.83 C
198511.3 C+0.42 C
198612.2 C+1.31 C

The annual mean temperature here has risen by 0.09 C (0.02 to 0.15) per decade over 1900 to 1986. In Fahrenheit: 0.15 F (0.04 to 0.26) per decade. The slope is a straight line fitted to 80 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Wellsburg Wtr Trmt Pl
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.09 C (0.02 to 0.15) per decade0.15 F (0.04 to 0.26) per decade1900 to 198680Rise
Mean daily maximum0.2 C (0.1 to 0.3) per decade0.4 F (0.2 to 0.6) per decade1900 to 198680Rise
Mean daily minimum-0.06 C (-0.14 to 0.02) per decade-0.11 F (-0.26 to 0.04) per decade1900 to 198680Not clearly different from zero

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1878 to 2004
Yearly extremes at Wellsburg Wtr Trmt Pl: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)41.1 C (106.0 F)191835.0 C (95.0 F)98
Coldest night (TNn)-32.2 C (-26.0 F)1934-21.1 C (-6.0 F)98
Wettest day (Rx1day)157.5 mm (6.2 in)191148.3 mm (1.9 in)105
Wettest five days (Rx5day)187.9 mm (7.4 in)191179.3 mm (3.1 in)103
Longest dry spell (CDD)33 days196315 days104

Hottest day (TXx)

Hottest day (TXx) at Wellsburg Wtr Trmt Pl by year The hottest day of the year at Wellsburg Wtr Trmt Pl, 1878 to 2004. The record is 41.1 C (106.0 F) in 1918, marked on the chart; the median year is 35.0 C (95.0 F). 10203040501880190019201940196019802000Record: 41.1 C (106.0 F) in 1918
The hottest day of the year at Wellsburg Wtr Trmt Pl, 1878 to 2004. The record is 41.1 C (106.0 F) in 1918, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Wellsburg Wtr Trmt Pl by year
YearHottest day (TXx)
1878n/a
1879n/a
1880n/a
1881n/a
1882n/a
1883n/a
1884n/a
1885n/a
189918.9 C (66.0 F)
190032.8 C (91.0 F)
190134.4 C (93.9 F)
190231.7 C (89.1 F)
190332.8 C (91.0 F)
190431.1 C (88.0 F)
190531.7 C (89.1 F)
190631.1 C (88.0 F)
190730.0 C (86.0 F)
190832.2 C (90.0 F)
190931.1 C (88.0 F)
191031.7 C (89.1 F)
191136.1 C (97.0 F)
191232.2 C (90.0 F)
191333.9 C (93.0 F)
191432.8 C (91.0 F)
191530.6 C (87.1 F)
191633.9 C (93.0 F)
191731.7 C (89.1 F)
191841.1 C (106.0 F)
191937.8 C (100.0 F)
192033.3 C (91.9 F)
192135.6 C (96.1 F)
192235.0 C (95.0 F)
192335.0 C (95.0 F)
192435.6 C (96.1 F)
192536.7 C (98.1 F)
192638.3 C (100.9 F)
192736.7 C (98.1 F)
192833.9 C (93.0 F)
192933.3 C (91.9 F)
193040.0 C (104.0 F)
193140.0 C (104.0 F)
193237.8 C (100.0 F)
193337.8 C (100.0 F)
193441.1 C (106.0 F)
193535.6 C (96.1 F)
193640.6 C (105.1 F)
193736.7 C (98.1 F)
193837.2 C (99.0 F)
193937.8 C (100.0 F)
194036.7 C (98.1 F)
194137.8 C (100.0 F)
194237.8 C (100.0 F)
194336.7 C (98.1 F)
194437.2 C (99.0 F)
194536.7 C (98.1 F)
194636.7 C (98.1 F)
194735.0 C (95.0 F)
194837.8 C (100.0 F)
194936.7 C (98.1 F)
195033.9 C (93.0 F)
195136.1 C (97.0 F)
195237.2 C (99.0 F)
195339.4 C (102.9 F)
195438.9 C (102.0 F)
195537.8 C (100.0 F)
195636.1 C (97.0 F)
195736.7 C (98.1 F)
195833.3 C (91.9 F)
195935.6 C (96.1 F)
196032.8 C (91.0 F)
196133.9 C (93.0 F)
196237.2 C (99.0 F)
196334.4 C (93.9 F)
196435.6 C (96.1 F)
196536.7 C (98.1 F)
196638.3 C (100.9 F)
196734.4 C (93.9 F)
196835.0 C (95.0 F)
196935.0 C (95.0 F)
197035.0 C (95.0 F)
197135.0 C (95.0 F)
197234.4 C (93.9 F)
197335.6 C (96.1 F)
197432.8 C (91.0 F)
197536.1 C (97.0 F)
197632.2 C (90.0 F)
197735.6 C (96.1 F)
197833.3 C (91.9 F)
197932.2 C (90.0 F)
198036.1 C (97.0 F)
198135.0 C (95.0 F)
198233.9 C (93.0 F)
198336.1 C (97.0 F)
198432.8 C (91.0 F)
198534.4 C (93.9 F)
198633.3 C (91.9 F)
198733.9 C (93.0 F)
198837.8 C (100.0 F)
198931.1 C (88.0 F)
199823.3 C (73.9 F)
199936.1 C (97.0 F)
200030.6 C (87.1 F)
200133.9 C (93.0 F)
200235.6 C (96.1 F)
200332.2 C (90.0 F)
200427.2 C (81.0 F)

Coldest night (TNn)

Coldest night (TNn) at Wellsburg Wtr Trmt Pl by year The coldest night of the year at Wellsburg Wtr Trmt Pl, 1878 to 2004. The record is -32.2 C (-26.0 F) in 1934, marked on the chart; the median year is -21.1 C (-6.0 F). -40-30-20-1001880190019201940196019802000Record: -32.2 C (-26.0 F) in 1934
The coldest night of the year at Wellsburg Wtr Trmt Pl, 1878 to 2004. The record is -32.2 C (-26.0 F) in 1934, marked on the chart; the median year is -21.1 C (-6.0 F).
Coldest night (TNn) at Wellsburg Wtr Trmt Pl by year
YearColdest night (TNn)
1878n/a
1879n/a
1880n/a
1881n/a
1882n/a
1883n/a
1884n/a
1885n/a
1899-17.2 C (1.0 F)
1900-20.6 C (-5.1 F)
1901-20.6 C (-5.1 F)
1902-18.9 C (-2.0 F)
1903-21.1 C (-6.0 F)
1904-22.2 C (-8.0 F)
1905-22.8 C (-9.0 F)
1906-21.7 C (-7.1 F)
1907-21.1 C (-6.0 F)
1908-16.7 C (1.9 F)
1909-18.3 C (-0.9 F)
1910-21.7 C (-7.1 F)
1911-15.6 C (3.9 F)
1912-25.6 C (-14.1 F)
1913-16.7 C (1.9 F)
1914-21.1 C (-6.0 F)
1915-17.8 C (0.0 F)
1916-20.6 C (-5.1 F)
1917-21.1 C (-6.0 F)
1918-8.3 C (17.1 F)
1919-21.1 C (-6.0 F)
1920-21.1 C (-6.0 F)
1921-16.1 C (3.0 F)
1922-17.8 C (0.0 F)
1923-18.9 C (-2.0 F)
1924-21.1 C (-6.0 F)
1925-20.0 C (-4.0 F)
1926-25.0 C (-13.0 F)
1927-17.8 C (0.0 F)
1928-16.7 C (1.9 F)
1929-22.8 C (-9.0 F)
1930-22.8 C (-9.0 F)
1931-15.0 C (5.0 F)
1932-23.9 C (-11.0 F)
1933-20.6 C (-5.1 F)
1934-32.2 C (-26.0 F)
1935-22.8 C (-9.0 F)
1936-27.2 C (-17.0 F)
1937-18.9 C (-2.0 F)
1938-17.2 C (1.0 F)
1939-16.7 C (1.9 F)
1940-22.2 C (-8.0 F)
1941-16.1 C (3.0 F)
1942-29.4 C (-20.9 F)
1943-23.9 C (-11.0 F)
1944-18.9 C (-2.0 F)
1945-23.3 C (-9.9 F)
1946-23.9 C (-11.0 F)
1947-18.3 C (-0.9 F)
1948-28.9 C (-20.0 F)
1949-17.2 C (1.0 F)
1950-24.4 C (-11.9 F)
1951-26.1 C (-15.0 F)
1952-22.2 C (-8.0 F)
1953-16.7 C (1.9 F)
1954-17.2 C (1.0 F)
1955-24.4 C (-11.9 F)
1956-15.0 C (5.0 F)
1957-22.2 C (-8.0 F)
1958-23.3 C (-9.9 F)
1959-23.3 C (-9.9 F)
1960-21.7 C (-7.1 F)
1961-26.1 C (-15.0 F)
1962-21.1 C (-6.0 F)
1963-30.0 C (-22.0 F)
1964-24.4 C (-11.9 F)
1965-25.0 C (-13.0 F)
1966-25.0 C (-13.0 F)
1967-23.3 C (-9.9 F)
1968-23.9 C (-11.0 F)
1969-18.9 C (-2.0 F)
1970-22.8 C (-9.0 F)
1971-19.4 C (-2.9 F)
1972-22.2 C (-8.0 F)
1973-18.3 C (-0.9 F)
1974-12.2 C (10.0 F)
1975-19.4 C (-2.9 F)
1976-21.1 C (-6.0 F)
1977-25.6 C (-14.1 F)
1978-21.1 C (-6.0 F)
1979-22.8 C (-9.0 F)
1980-17.8 C (0.0 F)
1981-18.9 C (-2.0 F)
1982-31.7 C (-25.1 F)
1983-27.2 C (-17.0 F)
1984-23.3 C (-9.9 F)
1985-27.8 C (-18.0 F)
1986-18.3 C (-0.9 F)
1987-20.0 C (-4.0 F)
1988-17.8 C (0.0 F)
1989-9.4 C (15.1 F)
1998-11.7 C (10.9 F)
1999-17.2 C (1.0 F)
2000-17.8 C (0.0 F)
2001-14.4 C (6.1 F)
2002-12.2 C (10.0 F)
2003-17.8 C (0.0 F)
2004-17.8 C (0.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Wellsburg Wtr Trmt Pl by year The wettest day of the year at Wellsburg Wtr Trmt Pl, 1878 to 2004. The record is 157.5 mm (6.2 in) in 1911, marked on the chart; the median year is 48.3 mm (1.9 in). 0501001502001880190019201940196019802000Record: 157.5 mm (6.2 in) in 1911
The wettest day of the year at Wellsburg Wtr Trmt Pl, 1878 to 2004. The record is 157.5 mm (6.2 in) in 1911, marked on the chart; the median year is 48.3 mm (1.9 in).
Wettest day (Rx1day) at Wellsburg Wtr Trmt Pl by year
YearWettest day (Rx1day)
187840.6 mm (1.6 in)
187982.6 mm (3.3 in)
188060.2 mm (2.4 in)
188154.1 mm (2.1 in)
188235.6 mm (1.4 in)
1883114.3 mm (4.5 in)
188450.8 mm (2.0 in)
188544.5 mm (1.8 in)
189919.1 mm (0.8 in)
190047.8 mm (1.9 in)
190163.5 mm (2.5 in)
190245.7 mm (1.8 in)
190341.1 mm (1.6 in)
190447.5 mm (1.9 in)
190533.0 mm (1.3 in)
190667.6 mm (2.7 in)
190750.8 mm (2.0 in)
190850.0 mm (2.0 in)
190931.8 mm (1.3 in)
191031.0 mm (1.2 in)
1911157.5 mm (6.2 in)
191258.7 mm (2.3 in)
191351.8 mm (2.0 in)
191450.8 mm (2.0 in)
191554.6 mm (2.1 in)
191654.1 mm (2.1 in)
191752.1 mm (2.1 in)
191844.5 mm (1.8 in)
191982.0 mm (3.2 in)
192096.0 mm (3.8 in)
192157.4 mm (2.3 in)
192241.4 mm (1.6 in)
192380.8 mm (3.2 in)
192466.0 mm (2.6 in)
192543.4 mm (1.7 in)
192655.4 mm (2.2 in)
192773.7 mm (2.9 in)
192851.6 mm (2.0 in)
192962.2 mm (2.4 in)
193038.4 mm (1.5 in)
193150.8 mm (2.0 in)
193235.8 mm (1.4 in)
193345.7 mm (1.8 in)
193453.8 mm (2.1 in)
193564.5 mm (2.5 in)
193687.1 mm (3.4 in)
193743.9 mm (1.7 in)
193844.2 mm (1.7 in)
193955.9 mm (2.2 in)
194045.0 mm (1.8 in)
194147.2 mm (1.9 in)
194261.5 mm (2.4 in)
194349.5 mm (1.9 in)
194484.8 mm (3.3 in)
194562.0 mm (2.4 in)
194666.8 mm (2.6 in)
194750.8 mm (2.0 in)
194847.2 mm (1.9 in)
194947.2 mm (1.9 in)
195069.9 mm (2.8 in)
195148.3 mm (1.9 in)
195250.5 mm (2.0 in)
195338.1 mm (1.5 in)
195467.8 mm (2.7 in)
195565.0 mm (2.6 in)
195645.5 mm (1.8 in)
195736.1 mm (1.4 in)
195844.5 mm (1.8 in)
195951.8 mm (2.0 in)
196036.3 mm (1.4 in)
196136.1 mm (1.4 in)
196288.6 mm (3.5 in)
196336.1 mm (1.4 in)
196440.1 mm (1.6 in)
196553.6 mm (2.1 in)
196642.4 mm (1.7 in)
196733.0 mm (1.3 in)
196828.2 mm (1.1 in)
196981.0 mm (3.2 in)
197038.1 mm (1.5 in)
197174.9 mm (2.9 in)
197236.3 mm (1.4 in)
197342.7 mm (1.7 in)
197451.8 mm (2.0 in)
197576.7 mm (3.0 in)
197646.0 mm (1.8 in)
197767.3 mm (2.6 in)
197840.9 mm (1.6 in)
197946.7 mm (1.8 in)
198094.0 mm (3.7 in)
198145.7 mm (1.8 in)
198238.9 mm (1.5 in)
198339.4 mm (1.6 in)
198441.7 mm (1.6 in)
198571.1 mm (2.8 in)
198645.7 mm (1.8 in)
198745.5 mm (1.8 in)
198853.3 mm (2.1 in)
198952.1 mm (2.1 in)
199834.0 mm (1.3 in)
199942.4 mm (1.7 in)
200039.6 mm (1.6 in)
200141.9 mm (1.6 in)
200235.1 mm (1.4 in)
200331.5 mm (1.2 in)
2004n/a

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Wellsburg Wtr Trmt Pl by year The wettest five days of the year at Wellsburg Wtr Trmt Pl, 1878 to 2004. The record is 187.9 mm (7.4 in) in 1911, marked on the chart; the median year is 79.3 mm (3.1 in). 0501001502001880190019201940196019802000Record: 187.9 mm (7.4 in) in 1911
The wettest five days of the year at Wellsburg Wtr Trmt Pl, 1878 to 2004. The record is 187.9 mm (7.4 in) in 1911, marked on the chart; the median year is 79.3 mm (3.1 in).
Wettest five days (Rx5day) at Wellsburg Wtr Trmt Pl by year
YearWettest five days (Rx5day)
1878n/a
187989.0 mm (3.5 in)
188072.6 mm (2.9 in)
188162.7 mm (2.5 in)
188257.2 mm (2.3 in)
1883130.0 mm (5.1 in)
188458.0 mm (2.3 in)
188563.5 mm (2.5 in)
189935.9 mm (1.4 in)
190069.8 mm (2.7 in)
1901128.4 mm (5.1 in)
190274.3 mm (2.9 in)
190368.7 mm (2.7 in)
1904101.6 mm (4.0 in)
190564.6 mm (2.5 in)
190688.4 mm (3.5 in)
190780.3 mm (3.2 in)
190857.7 mm (2.3 in)
190968.7 mm (2.7 in)
191054.1 mm (2.1 in)
1911187.9 mm (7.4 in)
1912128.3 mm (5.1 in)
1913101.8 mm (4.0 in)
191479.7 mm (3.1 in)
191584.8 mm (3.3 in)
191668.1 mm (2.7 in)
191759.1 mm (2.3 in)
191866.0 mm (2.6 in)
191996.7 mm (3.8 in)
1920163.9 mm (6.5 in)
192184.1 mm (3.3 in)
192272.1 mm (2.8 in)
192386.6 mm (3.4 in)
192485.0 mm (3.3 in)
192558.6 mm (2.3 in)
1926118.9 mm (4.7 in)
192778.8 mm (3.1 in)
192898.9 mm (3.9 in)
192992.5 mm (3.6 in)
193045.0 mm (1.8 in)
193163.5 mm (2.5 in)
193254.2 mm (2.1 in)
193383.5 mm (3.3 in)
193471.8 mm (2.8 in)
1935122.9 mm (4.8 in)
193696.0 mm (3.8 in)
1937105.5 mm (4.2 in)
193879.0 mm (3.1 in)
193973.7 mm (2.9 in)
194097.1 mm (3.8 in)
194191.8 mm (3.6 in)
194275.7 mm (3.0 in)
194390.9 mm (3.6 in)
194497.0 mm (3.8 in)
194595.8 mm (3.8 in)
194673.4 mm (2.9 in)
194793.3 mm (3.7 in)
1948105.4 mm (4.1 in)
194973.9 mm (2.9 in)
195088.1 mm (3.5 in)
195179.3 mm (3.1 in)
195264.7 mm (2.5 in)
195363.0 mm (2.5 in)
1954104.3 mm (4.1 in)
195583.9 mm (3.3 in)
195679.5 mm (3.1 in)
195755.3 mm (2.2 in)
195871.2 mm (2.8 in)
195971.3 mm (2.8 in)
196072.5 mm (2.9 in)
196165.7 mm (2.6 in)
1962117.8 mm (4.6 in)
196379.3 mm (3.1 in)
196485.8 mm (3.4 in)
196571.1 mm (2.8 in)
196659.8 mm (2.4 in)
196784.3 mm (3.3 in)
196864.3 mm (2.5 in)
1969122.6 mm (4.8 in)
197076.3 mm (3.0 in)
197190.5 mm (3.6 in)
197266.4 mm (2.6 in)
197362.6 mm (2.5 in)
1974101.4 mm (4.0 in)
1975178.4 mm (7.0 in)
1976115.1 mm (4.5 in)
197772.9 mm (2.9 in)
197869.6 mm (2.7 in)
197986.8 mm (3.4 in)
1980132.0 mm (5.2 in)
198184.1 mm (3.3 in)
198267.9 mm (2.7 in)
198368.3 mm (2.7 in)
198471.7 mm (2.8 in)
1985130.5 mm (5.1 in)
1986109.5 mm (4.3 in)
198767.9 mm (2.7 in)
1988104.1 mm (4.1 in)
1989182.7 mm (7.2 in)
199846.7 mm (1.8 in)
199986.8 mm (3.4 in)
200048.5 mm (1.9 in)
200161.9 mm (2.4 in)
200238.1 mm (1.5 in)
2003n/a
2004n/a

Longest dry spell (CDD)

Longest dry spell (CDD) at Wellsburg Wtr Trmt Pl by year The longest dry spell of the year at Wellsburg Wtr Trmt Pl, 1878 to 2004. The record is 33 days in 1963, marked on the chart; the median year is 15 days. 0102030401880190019201940196019802000Record: 33 days in 1963
The longest dry spell of the year at Wellsburg Wtr Trmt Pl, 1878 to 2004. The record is 33 days in 1963, marked on the chart; the median year is 15 days.
Longest dry spell (CDD) at Wellsburg Wtr Trmt Pl by year
YearLongest dry spell (CDD)
18781 day
187915 days
188020 days
188112 days
188210 days
188318 days
188427 days
188515 days
18997 days
190014 days
190119 days
190215 days
190318 days
190421 days
190510 days
190611 days
19079 days
190821 days
190913 days
191014 days
191121 days
191218 days
191316 days
191415 days
191516 days
191617 days
191719 days
191815 days
191912 days
192023 days
192111 days
192218 days
192324 days
192419 days
192515 days
192614 days
192718 days
192812 days
192915 days
193014 days
193114 days
193216 days
193311 days
193425 days
193513 days
193621 days
193714 days
193826 days
193920 days
194013 days
194120 days
194217 days
194319 days
194416 days
194514 days
194613 days
194727 days
194818 days
194912 days
195013 days
195116 days
195217 days
195320 days
195414 days
195525 days
195614 days
195713 days
195812 days
195923 days
196012 days
196110 days
196219 days
196333 days
196423 days
196513 days
196616 days
196726 days
196810 days
196922 days
197016 days
197124 days
197212 days
197315 days
197410 days
197512 days
197625 days
197715 days
197811 days
197912 days
198015 days
198125 days
198219 days
198312 days
198414 days
198523 days
198617 days
198719 days
198831 days
198912 days
199814 days
199924 days
200024 days
200115 days
200210 days
2003n/a
2004n/a

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

80 years with a frost

Across 80 years with a frost, the median last spring frost at Wellsburg Wtr Trmt Pl falls on 8 May and the median first autumn frost on 9 October, which leaves a median of 152 days between them.

In 1953 to 1986 the median growing season was 154 days. That is 11 days fewer than in 1900 to 1932.

Fitted over all years, the growing season changes by -1.0 days per decade at this station.

Frost dates and growing season at Wellsburg Wtr Trmt Pl
MeasureMedian, all yearsEarliest period (1900 to 1932)Recent period (1953 to 1986)Recent against earliestFitted trend
Last spring frost8 May4 May6 May2 days later+0.6 days per decade
First autumn frost9 October10 October9 October1 day earlier-0.5 days per decade
Growing days152 days165 days154 days11 days fewer-1.0 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

75 years, 1900 to 1999

A day with at least 51.0 mm (2.0 in) of rain is expected about once in 2 years. A day with at least 128.3 mm (5.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Wellsburg Wtr Trmt Pl: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years51.0 mm (2.0 in)
5 years67.1 mm (2.6 in)
10 years79.4 mm (3.1 in)
25 years97.0 mm (3.8 in)
50 years111.9 mm (4.4 in)
100 years128.3 mm (5.1 in)Longer than the 75 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 75 years of values from 1900 to 1999.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 157.5 mm (6.2 in) in 1911; 96.0 mm (3.8 in) in 1920; 94.0 mm (3.7 in) in 1980.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Wellsburg Wtr Trmt Pl, at 1927. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1927 ran 0.2 C (0.4 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Wellsburg Wtr Trmt Pl, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
1927-0.2-0.4possible5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

  • Data for Wellsburg Wtr Trmt Pl standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Wellsburg Wtr Trmt Pl threshold days by year: CSV or JSON. Field meanings are on the data page.

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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of . Last revised (2025-12-31).