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Oak Ridge Atdd Weather Records (USW00003841)

Record envelope, standing records and threshold days for Oak Ridge Atdd (USW00003841), Tennessee, United States, with 78 years of record.

Key Facts for Oak Ridge Atdd

  • Oak Ridge Atdd (USW00003841) is a weather station in Tennessee, United States at 36.00 latitude and -84.22 longitude, 311 m (1,019 ft) above sea level.
  • The station reports from 1948 to 2025, 78 years of record.
  • 1,464 records set at Oak Ridge Atdd still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Oak Ridge Atdd set a daily record precipitation of 36.6 mm (1.4 in) on 25 November 2025.

About the Station

  • Location: Tennessee, United States, 36.00 latitude, -84.22 longitude.
  • Elevation: 311 m (1,019 ft).
  • Period of record: 1948 to 2025, 78 years.
  • Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

3 days at or beyond a record
Daily record high and record low at Oak Ridge Atdd, with 2026 drawn through them The band shows the record high and record low for each calendar day at Oak Ridge Atdd. The lines show the 2026 daily maximum and minimum. 3 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 Oak Ridge Atdd. The lines show the 2026 daily maximum and minimum. 3 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Oak Ridge Atdd, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan24.4 C (75.9 F)-27.2 C (-17.0 F)17.2 C (63.0 F)-14.4 C (6.1 F)
Feb27.2 C (81.0 F)-25.0 C (-13.0 F)n/an/a
Mar30.6 C (87.1 F)-17.2 C (1.0 F)26.7 C (80.1 F)-3.9 C (25.0 F)
Apr33.3 C (91.9 F)-6.7 C (19.9 F)30.0 C (86.0 F)0.0 C (32.0 F)
May34.4 C (93.9 F)-1.1 C (30.0 F)28.9 C (84.0 F)7.8 C (46.0 F)
Jun40.0 C (104.0 F)3.9 C (39.0 F)n/an/a
Jul40.6 C (105.1 F)9.4 C (48.9 F)34.4 C (93.9 F)17.2 C (63.0 F)
Aug39.4 C (102.9 F)10.0 C (50.0 F)n/an/a
Sep38.9 C (102.0 F)0.6 C (33.1 F)n/an/a
Oct34.4 C (93.9 F)-6.1 C (21.0 F)n/an/a
Nov29.4 C (84.9 F)-17.8 C (0.0 F)24.4 C (75.9 F)-5.0 C (23.0 F)
Dec25.6 C (78.1 F)-21.7 C (-7.1 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Oak Ridge Atdd by the year they were set 1,464 records at Oak Ridge Atdd still stand. 1954 holds the most, with 42. 02040601948: 111949: 211950: 241951: 221952: 331953: 281954: 421955: 221956: 211957: 241958: 221959: 191960: 181961: 201962: 281963: 331964: 141965: 121966: 171967: 271968: 141969: 71970: 171971: 121972: 151973: 71974: 381975: 111976: 331977: 241978: 131979: 241980: 231981: 161982: 271983: 281984: 231985: 331986: 201987: 141988: 191989: 341990: 101991: 301992: 111993: 101994: 101995: 221996: 211997: 131998: 261999: 102000: 92001: 92002: 252003: 122004: 112005: 72006: 142007: 242008: 52009: 112010: 232011: 212012: 172013: 42014: 142015: 202016: 142017: 232018: 212019: 172020: 262021: 142022: 222023: 112024: 102025: 71948195619641972198019881996200420122020
1,464 records at Oak Ridge Atdd still stand. 1954 holds the most, with 42.
Standing records at Oak Ridge Atdd by the year they were set
Year setStanding records
194811
194921
195024
195122
195233
195328
195442
195522
195621
195724
195822
195919
196018
196120
196228
196333
196414
196512
196617
196727
196814
19697
197017
197112
197215
19737
197438
197511
197633
197724
197813
197924
198023
198116
198227
198328
198423
198533
198620
198714
198819
198934
199010
199130
199211
199310
199410
199522
199621
199713
199826
199910
20009
20019
200225
200312
200411
20057
200614
200724
20085
200911
201023
201121
201217
20134
201414
201520
201614
201723
201821
201917
202026
202114
202222
202311
202410
20257

All-Time Record Progression

7 new records
When Oak Ridge Atdd set new all-time records 7 all-time records were set at Oak Ridge Atdd between 17 January 1982 and 27 February 2015. Each dot is a new record. Record low minimum temperatureRecord snow depthRecord high minimum temperature17 January 1982: Record low minimum temperature -23.3 C (-9.9 F)20 January 1985: Record low minimum temperature -26.1 C (-15.0 F)21 January 1985: Record low minimum temperature -27.2 C (-17.0 F)3 February 1996: Record snow depth 30.5 cm (12.0 in)8 August 1998: Record high minimum temperature 27.2 C (81.0 F)19 February 2015: Record snow depth 51.0 cm (20.1 in)27 February 2015: Record snow depth 102.0 cm (40.2 in)1985199019952000200520102015
7 all-time records were set at Oak Ridge Atdd between 17 January 1982 and 27 February 2015. Each dot is a new record.
When Oak Ridge Atdd set new all-time records
DateKindDetail
1982-01-17Record low minimum temperatureRecord low minimum temperature -23.3 C (-9.9 F)
1985-01-20Record low minimum temperatureRecord low minimum temperature -26.1 C (-15.0 F)
1985-01-21Record low minimum temperatureRecord low minimum temperature -27.2 C (-17.0 F)
1996-02-03Record snow depthRecord snow depth 30.5 cm (12.0 in)
1998-08-08Record high minimum temperatureRecord high minimum temperature 27.2 C (81.0 F)
2015-02-19Record snow depthRecord snow depth 51.0 cm (20.1 in)
2015-02-27Record snow depthRecord snow depth 102.0 cm (40.2 in)

Wettest Day of Each Month

Aug: 189.2 mm (7.4 in)
Record daily precipitation for each month at Oak Ridge Atdd The wettest day on record for each calendar month at Oak Ridge Atdd. The most was 189.2 mm (7.4 in) on 10 August 1960. 050100150200 Jan: 104.1 mm (4.1 in), 15 January 1954 Jan Feb: 118.1 mm (4.6 in), 23 February 2019 Feb Mar: 95.3 mm (3.8 in), 16 March 1973 Mar Apr: 137.9 mm (5.4 in), 4 April 1977 Apr May: 111.8 mm (4.4 in), 27 May 1973 May Jun: 89.9 mm (3.5 in), 23 June 1969 Jun Jul: 120.9 mm (4.8 in), 31 July 1996 Jul Aug: 189.2 mm (7.4 in), 10 August 1960 Aug Sep: 175.0 mm (6.9 in), 5 September 2011 Sep Oct: 67.1 mm (2.6 in), 25 October 2010 Oct Nov: 126.5 mm (5.0 in), 27 November 1973 Nov Dec: 124.2 mm (4.9 in), 4 December 1993 Dec
The wettest day on record for each calendar month at Oak Ridge Atdd. The most was 189.2 mm (7.4 in) on 10 August 1960.
Record daily precipitation for each month at Oak Ridge Atdd
MonthRecord daily precipitation (mm)Date
Jan104.1 mm (4.1 in)15 January 1954
Feb118.1 mm (4.6 in)23 February 2019
Mar95.3 mm (3.8 in)16 March 1973
Apr137.9 mm (5.4 in)4 April 1977
May111.8 mm (4.4 in)27 May 1973
Jun89.9 mm (3.5 in)23 June 1969
Jul120.9 mm (4.8 in)31 July 1996
Aug189.2 mm (7.4 in)10 August 1960
Sep175.0 mm (6.9 in)5 September 2011
Oct67.1 mm (2.6 in)25 October 2010
Nov126.5 mm (5.0 in)27 November 1973
Dec124.2 mm (4.9 in)4 December 1993

Period of Record Coverage

1948 to 2025
Days with data per year at Oak Ridge Atdd 78 years of record at Oak Ridge Atdd, 1948 to 2025. 3 years have data for under 90 percent of days and are left out of rankings: 1948, 2001, 2025. 1948: 152 of 366 days1949: 364 of 365 days1950: 364 of 365 days1951: 365 of 365 days1952: 366 of 366 days1953: 365 of 365 days1954: 364 of 365 days1955: 364 of 365 days1956: 365 of 366 days1957: 363 of 365 days1958: 365 of 365 days1959: 365 of 365 days1960: 366 of 366 days1961: 365 of 365 days1962: 365 of 365 days1963: 365 of 365 days1964: 366 of 366 days1965: 365 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 366 of 366 days1969: 365 of 365 days1970: 365 of 365 days1971: 365 of 365 days1972: 366 of 366 days1973: 365 of 365 days1974: 365 of 365 days1975: 364 of 365 days1976: 366 of 366 days1977: 365 of 365 days1978: 365 of 365 days1979: 365 of 365 days1980: 366 of 366 days1981: 365 of 365 days1982: 365 of 365 days1983: 365 of 365 days1984: 366 of 366 days1985: 365 of 365 days1986: 365 of 365 days1987: 365 of 365 days1988: 366 of 366 days1989: 364 of 365 days1990: 364 of 365 days1991: 365 of 365 days1992: 365 of 366 days1993: 364 of 365 days1994: 365 of 365 days1995: 365 of 365 days1996: 366 of 366 days1997: 365 of 365 days1998: 365 of 365 days1999: 365 of 365 days2000: 366 of 366 days2001: 282 of 365 days2002: 365 of 365 days2003: 365 of 365 days2004: 366 of 366 days2005: 365 of 365 days2006: 365 of 365 days2007: 365 of 365 days2008: 366 of 366 days2009: 365 of 365 days2010: 365 of 365 days2011: 365 of 365 days2012: 366 of 366 days2013: 365 of 365 days2014: 336 of 365 days2015: 365 of 365 days2016: 365 of 366 days2017: 365 of 365 days2018: 365 of 365 days2019: 365 of 365 days2020: 366 of 366 days2021: 364 of 365 days2022: 365 of 365 days2023: 364 of 365 days2024: 366 of 366 days2025: 183 of 365 days19501960197019801990200020102020
78 years of record at Oak Ridge Atdd, 1948 to 2025. 3 years have data for under 90 percent of days and are left out of rankings: 1948, 2001, 2025.
Days with data per year at Oak Ridge Atdd
YearDays with dataShare of yearComplete
194815242%No
1949364100%Yes
1950364100%Yes
1951365100%Yes
1952366100%Yes
1953365100%Yes
1954364100%Yes
1955364100%Yes
1956365100%Yes
195736399%Yes
1958365100%Yes
1959365100%Yes
1960366100%Yes
1961365100%Yes
1962365100%Yes
1963365100%Yes
1964366100%Yes
1965365100%Yes
1966365100%Yes
1967365100%Yes
1968366100%Yes
1969365100%Yes
1970365100%Yes
1971365100%Yes
1972366100%Yes
1973365100%Yes
1974365100%Yes
1975364100%Yes
1976366100%Yes
1977365100%Yes
1978365100%Yes
1979365100%Yes
1980366100%Yes
1981365100%Yes
1982365100%Yes
1983365100%Yes
1984366100%Yes
1985365100%Yes
1986365100%Yes
1987365100%Yes
1988366100%Yes
1989364100%Yes
1990364100%Yes
1991365100%Yes
1992365100%Yes
1993364100%Yes
1994365100%Yes
1995365100%Yes
1996366100%Yes
1997365100%Yes
1998365100%Yes
1999365100%Yes
2000366100%Yes
200128277%No
2002365100%Yes
2003365100%Yes
2004366100%Yes
2005365100%Yes
2006365100%Yes
2007365100%Yes
2008366100%Yes
2009365100%Yes
2010365100%Yes
2011365100%Yes
2012366100%Yes
2013365100%Yes
201433692%Yes
2015365100%Yes
2016365100%Yes
2017365100%Yes
2018365100%Yes
2019365100%Yes
2020366100%Yes
2021364100%Yes
2022365100%Yes
2023364100%Yes
2024366100%Yes
202518350%No

Latest Records

20
Latest records at Oak Ridge Atdd
DateStationRecordValueBeat old record byOld record stoodSignificance
25 November 2025Oak Ridge Atdd, USdaily rain36.6 mm (1.4 in)2.3 mm (0.09 in)26 years15 of 100 (Routine)
11 November 2025Oak Ridge Atdd, USdaily low min-5.0 C (23.0 F)0.6 C (1.1 F)38 years19 of 100 (Routine)
10 November 2025Oak Ridge Atdd, USdaily low max2.2 C (36.0 F)2.8 C (5.0 F)52 years26 of 100 (Routine)
10 November 2025Oak Ridge Atdd, USdaily low min (Tie)-3.3 C (26.1 F)tie52 years5 of 100 (Routine)
19 July 2025Oak Ridge Atdd, USdaily high min (Tie)23.3 C (73.9 F)tie67 years6 of 100 (Routine)
17 July 2025Oak Ridge Atdd, USdaily high min (Tie)23.9 C (75.0 F)tie4 years2 of 100 (Routine)
16 May 2025Oak Ridge Atdd, USdaily high min20.0 C (68.0 F)0.6 C (1.1 F)27 years16 of 100 (Routine)
21 April 2025Oak Ridge Atdd, USdaily high min (Tie)17.2 C (63.0 F)tie23 years3 of 100 (Routine)
6 April 2025Oak Ridge Atdd, USdaily high min15.6 C (60.1 F)0.6 C (1.1 F)58 years25 of 100 (Routine)
5 April 2025Oak Ridge Atdd, USdaily high min (Tie)18.9 C (66.0 F)tie2 years1 of 100 (Routine)
4 April 2025Oak Ridge Atdd, USdaily high min21.7 C (71.1 F)6.7 C (12.1 F)26 years27 of 100 (Routine)
4 April 2025Oak Ridge Atdd, USdaily high max30.0 C (86.0 F)0.6 C (1.1 F)26 years15 of 100 (Routine)
3 April 2025Oak Ridge Atdd, USdaily high min21.1 C (70.0 F)5.5 C (9.9 F)36 years28 of 100 (Routine)
14 November 2024Oak Ridge Atdd, USdaily rain34.5 mm (1.4 in)0.7 mm (0.03 in)73 years28 of 100 (Routine)
7 November 2024Oak Ridge Atdd, USdaily high min17.2 C (63.0 F)1.1 C (2.0 F)2 years9 of 100 (Routine)
5 November 2024Oak Ridge Atdd, USdaily high max26.7 C (80.1 F)1.7 C (3.1 F)30 years19 of 100 (Routine)
15 October 2024Oak Ridge Atdd, USdaily low max12.8 C (55.0 F)1.1 C (2.0 F)20 years15 of 100 (Routine)
24 July 2024Oak Ridge Atdd, USdaily low max24.4 C (75.9 F)1.2 C (2.2 F)74 years33 of 100 (Routine)
9 July 2024Oak Ridge Atdd, USdaily high min23.3 C (73.9 F)0.5 C (0.9 F)5 years10 of 100 (Routine)
4 July 2024Oak Ridge Atdd, USdaily high min (Tie)22.8 C (73.0 F)tie68 years6 of 100 (Routine)

Climate Trend

74 complete years, 1949 to 2024
Annual mean temperature at Oak Ridge Atdd as warming stripes, 1949 to 2024 One stripe for each of 74 complete years at Oak Ridge Atdd, 1949 to 2024. Blue stripes are years cooler than the station's own mean of 14.6 C (58.2 F); red stripes are warmer. The coolest year was 1976, at 12.5 C (54.4 F), and the warmest was 1998, at 16.4 C (61.5 F). The strongest colour marks a difference of 2.2 C (4.0 F). 1949: 14.4 C, -0.2 C from the station mean1950: 13.2 C, -1.4 C from the station mean1951: 14.4 C, -0.2 C from the station mean1952: 14.9 C, +0.3 C from the station mean1953: 15.1 C, +0.5 C from the station mean1954: 14.9 C, +0.3 C from the station mean1955: 14.5 C, -0.1 C from the station mean1956: 15.5 C, +0.9 C from the station mean1957: 15.9 C, +1.3 C from the station mean1958: 13.8 C, -0.8 C from the station mean1959: 14.8 C, +0.3 C from the station mean1960: 13.6 C, -1.0 C from the station mean1961: 14.1 C, -0.4 C from the station mean1962: 14.1 C, -0.5 C from the station mean1963: 13.4 C, -1.2 C from the station mean1964: 14.1 C, -0.4 C from the station mean1965: 14.3 C, -0.3 C from the station mean1966: 13.7 C, -0.9 C from the station mean1967: 13.8 C, -0.8 C from the station mean1968: 13.8 C, -0.8 C from the station mean1969: 13.6 C, -0.9 C from the station mean1970: 14.3 C, -0.3 C from the station mean1971: 14.5 C, -0.1 C from the station mean1972: 14.0 C, -0.5 C from the station mean1973: 14.6 C, 0.0 C from the station mean1974: 14.1 C, -0.5 C from the station mean1975: 14.0 C, -0.6 C from the station mean1976: 12.5 C, -2.1 C from the station mean1977: 13.3 C, -1.2 C from the station mean1978: 13.2 C, -1.4 C from the station mean1979: 13.3 C, -1.3 C from the station mean1980: 13.9 C, -0.7 C from the station mean1981: 13.2 C, -1.4 C from the station mean1982: 13.8 C, -0.7 C from the station mean1983: 13.4 C, -1.2 C from the station mean1984: 13.6 C, -1.0 C from the station mean1985: 13.0 C, -1.5 C from the station mean1986: 14.8 C, +0.2 C from the station mean1987: 14.6 C, +0.1 C from the station mean1988: 14.0 C, -0.6 C from the station mean1989: 14.1 C, -0.5 C from the station mean1990: 15.5 C, +0.9 C from the station mean1991: 15.5 C, +0.9 C from the station mean1992: 14.2 C, -0.4 C from the station mean1993: 14.7 C, +0.2 C from the station mean1994: 14.3 C, -0.3 C from the station mean1995: 14.9 C, +0.3 C from the station mean1996: 14.1 C, -0.4 C from the station mean1997: 14.7 C, +0.1 C from the station mean1998: 16.4 C, +1.8 C from the station mean1999: 15.5 C, +0.9 C from the station mean2000: 14.7 C, +0.1 C from the station mean2002: 15.4 C, +0.8 C from the station mean2003: 14.8 C, +0.2 C from the station mean2004: 15.3 C, +0.7 C from the station mean2005: 15.2 C, +0.6 C from the station mean2006: 15.4 C, +0.8 C from the station mean2007: 15.8 C, +1.2 C from the station mean2008: 14.6 C, 0.0 C from the station mean2009: 14.6 C, 0.0 C from the station mean2010: 14.7 C, +0.1 C from the station mean2011: 15.5 C, +0.9 C from the station mean2012: 16.1 C, +1.5 C from the station mean2013: 14.6 C, 0.0 C from the station mean2015: 15.6 C, +1.0 C from the station mean2016: 15.9 C, +1.4 C from the station mean2017: 15.6 C, +1.0 C from the station mean2018: 15.2 C, +0.6 C from the station mean2019: 15.4 C, +0.8 C from the station mean2020: 16.0 C, +1.4 C from the station mean2021: 15.7 C, +1.1 C from the station mean2022: 15.6 C, +1.0 C from the station mean2023: 15.4 C, +0.8 C from the station mean2024: 15.6 C, +1.1 C from the station mean19491960197019801990200020102020
One stripe for each of 74 complete years at Oak Ridge Atdd, 1949 to 2024. Blue stripes are years cooler than the station's own mean of 14.6 C (58.2 F); red stripes are warmer. The coolest year was 1976, at 12.5 C (54.4 F), and the warmest was 1998, at 16.4 C (61.5 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Oak Ridge Atdd as warming stripes, 1949 to 2024
YearAnnual mean temperatureDifference from the station mean
194914.4 C-0.19 C
195013.2 C-1.35 C
195114.4 C-0.21 C
195214.9 C+0.29 C
195315.1 C+0.53 C
195414.9 C+0.35 C
195514.5 C-0.07 C
195615.5 C+0.95 C
195715.9 C+1.35 C
195813.8 C-0.75 C
195914.8 C+0.27 C
196013.6 C-1.02 C
196114.1 C-0.43 C
196214.1 C-0.47 C
196313.4 C-1.17 C
196414.1 C-0.44 C
196514.3 C-0.30 C
196613.7 C-0.92 C
196713.8 C-0.80 C
196813.8 C-0.80 C
196913.6 C-0.93 C
197014.3 C-0.30 C
197114.5 C-0.06 C
197214.0 C-0.54 C
197314.6 C+0.01 C
197414.1 C-0.49 C
197514.0 C-0.56 C
197612.5 C-2.11 C
197713.3 C-1.23 C
197813.2 C-1.37 C
197913.3 C-1.26 C
198013.9 C-0.65 C
198113.2 C-1.38 C
198213.8 C-0.73 C
198313.4 C-1.16 C
198413.6 C-0.95 C
198513.0 C-1.54 C
198614.8 C+0.24 C
198714.6 C+0.07 C
198814.0 C-0.60 C
198914.1 C-0.51 C
199015.5 C+0.92 C
199115.5 C+0.94 C
199214.2 C-0.42 C
199314.7 C+0.17 C
199414.3 C-0.28 C
199514.9 C+0.30 C
199614.1 C-0.43 C
199714.7 C+0.13 C
199816.4 C+1.83 C
199915.5 C+0.93 C
200014.7 C+0.13 C
200215.4 C+0.85 C
200314.8 C+0.20 C
200415.3 C+0.70 C
200515.2 C+0.64 C
200615.4 C+0.82 C
200715.8 C+1.24 C
200814.6 C-0.01 C
200914.6 C+0.02 C
201014.7 C+0.11 C
201115.5 C+0.92 C
201216.1 C+1.49 C
201314.6 C-0.01 C
201515.6 C+1.05 C
201615.9 C+1.37 C
201715.6 C+1.04 C
201815.2 C+0.61 C
201915.4 C+0.85 C
202016.0 C+1.45 C
202115.7 C+1.13 C
202215.6 C+1.00 C
202315.4 C+0.82 C
202415.6 C+1.07 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1949 to 2024. In Fahrenheit: 0.4 F (0.2 to 0.5) per decade. The slope is a straight line fitted to 74 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Oak Ridge Atdd
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature0.2 C (0.1 to 0.3) per decade0.4 F (0.2 to 0.5) per decade1949 to 202474Rise
Mean daily maximum0.2 C (0.1 to 0.3) per decade0.3 F (0.2 to 0.5) per decade1949 to 202474Rise
Mean daily minimum0.2 C (0.2 to 0.3) per decade0.4 F (0.3 to 0.6) per decade1949 to 202474Rise

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

1948 to 2025
Yearly extremes at Oak Ridge Atdd: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)40.6 C (105.1 F)195235.6 C (96.1 F)78
Coldest night (TNn)-27.2 C (-17.0 F)1985-14.4 C (6.1 F)78
Wettest day (Rx1day)189.2 mm (7.4 in)196076.4 mm (3.0 in)78
Wettest five days (Rx5day)251.4 mm (9.9 in)2011130.4 mm (5.1 in)78
Longest dry spell (CDD)42 days200017 days78

Hottest day (TXx)

Hottest day (TXx) at Oak Ridge Atdd by year The hottest day of the year at Oak Ridge Atdd, 1948 to 2025. The record is 40.6 C (105.1 F) in 1952, marked on the chart; the median year is 35.6 C (96.1 F). 3234363840421960198020002020Record: 40.6 C (105.1 F) in 1952
The hottest day of the year at Oak Ridge Atdd, 1948 to 2025. The record is 40.6 C (105.1 F) in 1952, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Oak Ridge Atdd by year
YearHottest day (TXx)
194837.2 C (99.0 F)
194934.4 C (93.9 F)
195033.9 C (93.0 F)
195137.2 C (99.0 F)
195240.6 C (105.1 F)
195338.3 C (100.9 F)
195438.9 C (102.0 F)
195535.6 C (96.1 F)
195636.1 C (97.0 F)
195736.7 C (98.1 F)
195835.0 C (95.0 F)
195935.0 C (95.0 F)
196035.6 C (96.1 F)
196132.8 C (91.0 F)
196235.0 C (95.0 F)
196334.4 C (93.9 F)
196436.1 C (97.0 F)
196535.0 C (95.0 F)
196637.8 C (100.0 F)
196732.8 C (91.0 F)
196837.2 C (99.0 F)
196935.0 C (95.0 F)
197036.7 C (98.1 F)
197134.4 C (93.9 F)
197233.9 C (93.0 F)
197333.9 C (93.0 F)
197433.9 C (93.0 F)
197535.6 C (96.1 F)
197633.9 C (93.0 F)
197735.0 C (95.0 F)
197836.7 C (98.1 F)
197933.9 C (93.0 F)
198039.4 C (102.9 F)
198135.6 C (96.1 F)
198233.9 C (93.0 F)
198339.4 C (102.9 F)
198433.3 C (91.9 F)
198533.9 C (93.0 F)
198637.2 C (99.0 F)
198736.1 C (97.0 F)
198838.9 C (102.0 F)
198934.4 C (93.9 F)
199036.1 C (97.0 F)
199134.4 C (93.9 F)
199235.0 C (95.0 F)
199337.8 C (100.0 F)
199433.3 C (91.9 F)
199537.8 C (100.0 F)
199635.6 C (96.1 F)
199736.1 C (97.0 F)
199838.3 C (100.9 F)
199936.7 C (98.1 F)
200035.6 C (96.1 F)
200133.3 C (91.9 F)
200236.7 C (98.1 F)
200334.4 C (93.9 F)
200433.3 C (91.9 F)
200535.6 C (96.1 F)
200636.1 C (97.0 F)
200738.9 C (102.0 F)
200835.0 C (95.0 F)
200933.9 C (93.0 F)
201036.7 C (98.1 F)
201136.7 C (98.1 F)
201240.0 C (104.0 F)
201333.9 C (93.0 F)
201433.3 C (91.9 F)
201534.4 C (93.9 F)
201636.1 C (97.0 F)
201733.9 C (93.0 F)
201833.9 C (93.0 F)
201934.4 C (93.9 F)
202036.1 C (97.0 F)
202135.0 C (95.0 F)
202237.2 C (99.0 F)
202333.3 C (91.9 F)
202436.1 C (97.0 F)
202534.4 C (93.9 F)

Coldest night (TNn)

Coldest night (TNn) at Oak Ridge Atdd by year The coldest night of the year at Oak Ridge Atdd, 1948 to 2025. The record is -27.2 C (-17.0 F) in 1985, marked on the chart; the median year is -14.4 C (6.1 F). -30-20-1001960198020002020Record: -27.2 C (-17.0 F) in 1985
The coldest night of the year at Oak Ridge Atdd, 1948 to 2025. The record is -27.2 C (-17.0 F) in 1985, marked on the chart; the median year is -14.4 C (6.1 F).
Coldest night (TNn) at Oak Ridge Atdd by year
YearColdest night (TNn)
1948-10.0 C (14.0 F)
1949-8.3 C (17.1 F)
1950-17.8 C (0.0 F)
1951-15.6 C (3.9 F)
1952-11.1 C (12.0 F)
1953-13.9 C (7.0 F)
1954-11.7 C (10.9 F)
1955-15.0 C (5.0 F)
1956-10.0 C (14.0 F)
1957-14.4 C (6.1 F)
1958-17.2 C (1.0 F)
1959-16.1 C (3.0 F)
1960-14.4 C (6.1 F)
1961-16.1 C (3.0 F)
1962-19.4 C (-2.9 F)
1963-22.2 C (-8.0 F)
1964-13.3 C (8.1 F)
1965-17.2 C (1.0 F)
1966-22.8 C (-9.0 F)
1967-16.1 C (3.0 F)
1968-12.2 C (10.0 F)
1969-15.0 C (5.0 F)
1970-17.8 C (0.0 F)
1971-13.9 C (7.0 F)
1972-18.9 C (-2.0 F)
1973-12.2 C (10.0 F)
1974-10.6 C (12.9 F)
1975-14.4 C (6.1 F)
1976-17.2 C (1.0 F)
1977-22.2 C (-8.0 F)
1978-16.1 C (3.0 F)
1979-15.6 C (3.9 F)
1980-17.2 C (1.0 F)
1981-16.7 C (1.9 F)
1982-23.3 C (-9.9 F)
1983-21.7 C (-7.1 F)
1984-16.1 C (3.0 F)
1985-27.2 C (-17.0 F)
1986-18.9 C (-2.0 F)
1987-13.9 C (7.0 F)
1988-13.9 C (7.0 F)
1989-18.9 C (-2.0 F)
1990-11.1 C (12.0 F)
1991-15.0 C (5.0 F)
1992-14.4 C (6.1 F)
1993-15.0 C (5.0 F)
1994-20.6 C (-5.1 F)
1995-14.4 C (6.1 F)
1996-25.0 C (-13.0 F)
1997-14.4 C (6.1 F)
1998-12.2 C (10.0 F)
1999-9.4 C (15.1 F)
2000-11.7 C (10.9 F)
2001-12.2 C (10.0 F)
2002-11.1 C (12.0 F)
2003-16.7 C (1.9 F)
2004-11.1 C (12.0 F)
2005-11.7 C (10.9 F)
2006-10.0 C (14.0 F)
2007-11.7 C (10.9 F)
2008-11.7 C (10.9 F)
2009-13.9 C (7.0 F)
2010-16.7 C (1.9 F)
2011-11.1 C (12.0 F)
2012-9.4 C (15.1 F)
2013-7.8 C (18.0 F)
2014-18.9 C (-2.0 F)
2015-16.7 C (1.9 F)
2016-11.7 C (10.9 F)
2017-14.4 C (6.1 F)
2018-15.6 C (3.9 F)
2019-10.6 C (12.9 F)
2020-9.4 C (15.1 F)
2021-7.2 C (19.0 F)
2022-16.7 C (1.9 F)
2023-6.7 C (19.9 F)
2024-18.3 C (-0.9 F)
2025-14.4 C (6.1 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Oak Ridge Atdd by year The wettest day of the year at Oak Ridge Atdd, 1948 to 2025. The record is 189.2 mm (7.4 in) in 1960, marked on the chart; the median year is 76.4 mm (3.0 in). 0501001502001960198020002020Record: 189.2 mm (7.4 in) in 1960
The wettest day of the year at Oak Ridge Atdd, 1948 to 2025. The record is 189.2 mm (7.4 in) in 1960, marked on the chart; the median year is 76.4 mm (3.0 in).
Wettest day (Rx1day) at Oak Ridge Atdd by year
YearWettest day (Rx1day)
194856.1 mm (2.2 in)
194963.5 mm (2.5 in)
195075.4 mm (3.0 in)
195169.9 mm (2.8 in)
195271.1 mm (2.8 in)
195367.3 mm (2.6 in)
1954104.1 mm (4.1 in)
195559.9 mm (2.4 in)
195695.0 mm (3.7 in)
195775.4 mm (3.0 in)
195840.1 mm (1.6 in)
195972.9 mm (2.9 in)
1960189.2 mm (7.4 in)
196163.8 mm (2.5 in)
196285.6 mm (3.4 in)
196379.0 mm (3.1 in)
196455.1 mm (2.2 in)
196569.6 mm (2.7 in)
196658.4 mm (2.3 in)
1967119.6 mm (4.7 in)
196852.6 mm (2.1 in)
1969104.4 mm (4.1 in)
1970124.0 mm (4.9 in)
197181.5 mm (3.2 in)
197272.1 mm (2.8 in)
1973126.5 mm (5.0 in)
197454.9 mm (2.2 in)
197569.6 mm (2.7 in)
197669.9 mm (2.8 in)
1977137.9 mm (5.4 in)
197872.1 mm (2.8 in)
197973.4 mm (2.9 in)
198077.7 mm (3.1 in)
198154.9 mm (2.2 in)
198283.1 mm (3.3 in)
198384.6 mm (3.3 in)
198466.0 mm (2.6 in)
198569.3 mm (2.7 in)
198653.6 mm (2.1 in)
198764.0 mm (2.5 in)
198878.2 mm (3.1 in)
198961.0 mm (2.4 in)
199092.2 mm (3.6 in)
199178.5 mm (3.1 in)
199234.8 mm (1.4 in)
1993124.2 mm (4.9 in)
199494.2 mm (3.7 in)
199558.2 mm (2.3 in)
1996120.9 mm (4.8 in)
199790.7 mm (3.6 in)
199888.6 mm (3.5 in)
199978.7 mm (3.1 in)
200090.2 mm (3.6 in)
200165.5 mm (2.6 in)
200294.0 mm (3.7 in)
200390.7 mm (3.6 in)
200485.1 mm (3.4 in)
2005104.4 mm (4.1 in)
200686.4 mm (3.4 in)
200762.5 mm (2.5 in)
200867.6 mm (2.7 in)
200958.4 mm (2.3 in)
201086.9 mm (3.4 in)
2011175.0 mm (6.9 in)
201280.0 mm (3.1 in)
201377.4 mm (3.0 in)
201447.5 mm (1.9 in)
201579.0 mm (3.1 in)
2016102.1 mm (4.0 in)
201769.3 mm (2.7 in)
201866.8 mm (2.6 in)
2019118.1 mm (4.6 in)
202079.8 mm (3.1 in)
202185.6 mm (3.4 in)
202263.5 mm (2.5 in)
202362.7 mm (2.5 in)
202483.6 mm (3.3 in)
202551.3 mm (2.0 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Oak Ridge Atdd by year The wettest five days of the year at Oak Ridge Atdd, 1948 to 2025. The record is 251.4 mm (9.9 in) in 2011, marked on the chart; the median year is 130.4 mm (5.1 in). 501001502002503001960198020002020Record: 251.4 mm (9.9 in) in 2011
The wettest five days of the year at Oak Ridge Atdd, 1948 to 2025. The record is 251.4 mm (9.9 in) in 2011, marked on the chart; the median year is 130.4 mm (5.1 in).
Wettest five days (Rx5day) at Oak Ridge Atdd by year
YearWettest five days (Rx5day)
1948121.4 mm (4.8 in)
1949130.9 mm (5.2 in)
1950170.6 mm (6.7 in)
1951129.4 mm (5.1 in)
195271.1 mm (2.8 in)
1953111.4 mm (4.4 in)
1954144.5 mm (5.7 in)
1955128.5 mm (5.1 in)
1956196.9 mm (7.8 in)
1957193.8 mm (7.6 in)
195870.9 mm (2.8 in)
1959106.8 mm (4.2 in)
1960223.5 mm (8.8 in)
1961118.0 mm (4.6 in)
1962122.8 mm (4.8 in)
1963107.0 mm (4.2 in)
1964103.6 mm (4.1 in)
1965145.3 mm (5.7 in)
196694.0 mm (3.7 in)
1967174.2 mm (6.9 in)
196876.2 mm (3.0 in)
1969147.3 mm (5.8 in)
1970192.8 mm (7.6 in)
1971108.1 mm (4.3 in)
1972154.2 mm (6.1 in)
1973225.3 mm (8.9 in)
1974113.7 mm (4.5 in)
1975142.5 mm (5.6 in)
197694.5 mm (3.7 in)
1977191.3 mm (7.5 in)
197883.5 mm (3.3 in)
1979141.0 mm (5.6 in)
1980118.6 mm (4.7 in)
198176.2 mm (3.0 in)
1982110.8 mm (4.4 in)
1983112.6 mm (4.4 in)
1984169.4 mm (6.7 in)
1985109.7 mm (4.3 in)
198696.0 mm (3.8 in)
198787.4 mm (3.4 in)
1988116.1 mm (4.6 in)
1989111.3 mm (4.4 in)
1990147.8 mm (5.8 in)
1991186.2 mm (7.3 in)
199271.6 mm (2.8 in)
1993129.8 mm (5.1 in)
1994145.5 mm (5.7 in)
199588.6 mm (3.5 in)
1996184.2 mm (7.3 in)
1997102.9 mm (4.1 in)
1998191.3 mm (7.5 in)
1999131.6 mm (5.2 in)
2000131.8 mm (5.2 in)
2001142.4 mm (5.6 in)
2002163.8 mm (6.4 in)
2003229.9 mm (9.1 in)
2004145.5 mm (5.7 in)
2005171.4 mm (6.7 in)
200699.0 mm (3.9 in)
200796.6 mm (3.8 in)
2008122.2 mm (4.8 in)
200997.3 mm (3.8 in)
2010148.1 mm (5.8 in)
2011251.4 mm (9.9 in)
2012139.7 mm (5.5 in)
2013173.3 mm (6.8 in)
201492.1 mm (3.6 in)
2015161.8 mm (6.4 in)
2016133.8 mm (5.3 in)
2017148.6 mm (5.9 in)
2018134.6 mm (5.3 in)
2019184.6 mm (7.3 in)
2020152.9 mm (6.0 in)
2021104.1 mm (4.1 in)
2022156.7 mm (6.2 in)
202379.3 mm (3.1 in)
2024102.8 mm (4.0 in)
202569.8 mm (2.7 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Oak Ridge Atdd by year The longest dry spell of the year at Oak Ridge Atdd, 1948 to 2025. The record is 42 days in 2000, marked on the chart; the median year is 17 days. 010203040501960198020002020Record: 42 days in 2000
The longest dry spell of the year at Oak Ridge Atdd, 1948 to 2025. The record is 42 days in 2000, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Oak Ridge Atdd by year
YearLongest dry spell (CDD)
194818 days
194911 days
195017 days
195113 days
195230 days
195331 days
195418 days
195516 days
195619 days
195721 days
195814 days
195918 days
196018 days
196115 days
196219 days
196332 days
196429 days
196517 days
196614 days
196718 days
196825 days
196916 days
197016 days
197119 days
197226 days
197319 days
197421 days
197518 days
197614 days
197720 days
197811 days
197913 days
198024 days
198115 days
198213 days
198315 days
198418 days
198516 days
198619 days
198718 days
198814 days
198914 days
199011 days
199112 days
199220 days
199317 days
199412 days
199515 days
199614 days
199713 days
199821 days
199926 days
200042 days
200120 days
200215 days
200313 days
200411 days
200515 days
200616 days
200719 days
200823 days
20099 days
201011 days
201119 days
201214 days
201313 days
201413 days
201516 days
201632 days
201718 days
201814 days
201929 days
202013 days
202118 days
202230 days
202336 days
202431 days
202511 days

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

74 years with a frost

Across 74 years with a frost, the median last spring frost at Oak Ridge Atdd falls on 10 April and the median first autumn frost on 29 October, which leaves a median of 203 days between them.

In 1993 to 2024 the median growing season was 209 days. That is 5 days more than in 1949 to 1978.

Fitted over all years, the growing season changes by +1.3 days per decade at this station.

Frost dates and growing season at Oak Ridge Atdd
MeasureMedian, all yearsEarliest period (1949 to 1978)Recent period (1993 to 2024)Recent against earliestFitted trend
Last spring frost10 April10 April8 April2 days earlier-1.3 days per decade
First autumn frost29 October30 October1 November2 days later0.0 days per decade
Growing days203 days204 days209 days5 days more+1.3 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, 1949 to 2024

A day with at least 76.0 mm (3.0 in) of rain is expected about once in 2 years. A day with at least 174.3 mm (6.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Oak Ridge Atdd: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years76.0 mm (3.0 in)
5 years98.0 mm (3.9 in)
10 years114.2 mm (4.5 in)
25 years136.6 mm (5.4 in)
50 years154.8 mm (6.1 in)
100 years174.3 mm (6.9 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 1949 to 2024.

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: 189.2 mm (7.4 in) in 1960; 175.0 mm (6.9 in) in 2011; 137.9 mm (5.4 in) in 1977.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Oak Ridge Atdd, at 1974. Each is measured against neighbouring stations.

  • Relative to 5 neighbouring stations, the station's annual mean temperature from 1974 ran 0.4 C (0.8 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Oak Ridge Atdd, against neighbouring stations
YearShift (C)Shift (F)StrengthNeighbours
1974-0.4-0.8likely5

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.

Climate Twins

2009 to 2024 against 1961 to 1990

Over 2009 to 2024, Oak Ridge Atdd had a mean temperature of 15.4 C (59.8 F) and 1,560.4 mm (61.4 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Haleyville (United States, 368 km away), Oneonta (United States, 305 km away) and Jasper (United States, 366 km away).

Climate twins of Oak Ridge Atdd: stations whose 1961 to 1990 climate is closest to its 2009 to 2024 climate
Twin stationCountryDistance awayMean temperature, 1961-1990Rain a year, 1961-1990Climate difference
HaleyvilleUnited States368 km (229 mi)15.3 C (59.6 F)1,526.2 mm (60.1 in)0.40
OneontaUnited States305 km (190 mi)15.4 C (59.6 F)1,487.2 mm (58.6 in)0.47
JasperUnited States366 km (227 mi)15.4 C (59.6 F)1,491.7 mm (58.7 in)0.48

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

  • Data for Oak Ridge Atdd standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Oak Ridge Atdd 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.

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