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Knoxville UNIV of Tenn Weather Records (USC00404955)

Record envelope, standing records and threshold days for Knoxville UNIV of Tenn (USC00404955), Tennessee, United States, with 40 years of record.

Key Facts for Knoxville UNIV of Tenn

  • Knoxville UNIV of Tenn (USC00404955) is a weather station in Tennessee, United States at 35.95 latitude and -83.92 longitude, 273 m (895 ft) above sea level.
  • The station reports from 1943 to 1982, 40 years of record.
  • 1,464 records set at Knoxville UNIV of Tenn still stand.
  • Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
  • Knoxville UNIV of Tenn set a daily record low minimum temperature of 15.0 C (59.0 F) on 26 August 1982.

About the Station

  • Location: Tennessee, United States, 35.95 latitude, -83.92 longitude.
  • Elevation: 273 m (895 ft).
  • Period of record: 1943 to 1982, 40 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 Knoxville UNIV of Tenn, with 2026 drawn through them The band shows the record high and record low for each calendar day at Knoxville UNIV of Tenn. 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 Knoxville UNIV of Tenn. 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 Knoxville UNIV of Tenn, with 2026 drawn through them
MonthHighest record highLowest record low2026 highest maximum2026 lowest minimum
Jan25.6 C (78.1 F)-22.2 C (-8.0 F)n/an/a
Feb27.8 C (82.0 F)-17.2 C (1.0 F)n/an/a
Mar29.4 C (84.9 F)-15.0 C (5.0 F)n/an/a
Apr33.9 C (93.0 F)-3.3 C (26.1 F)n/an/a
May33.9 C (93.0 F)2.2 C (36.0 F)n/an/a
Jun39.4 C (102.9 F)7.2 C (45.0 F)n/an/a
Jul40.6 C (105.1 F)11.7 C (53.1 F)n/an/a
Aug38.3 C (100.9 F)8.9 C (48.0 F)n/an/a
Sep40.0 C (104.0 F)2.2 C (36.0 F)n/an/a
Oct34.4 C (93.9 F)-2.8 C (27.0 F)n/an/a
Nov29.4 C (84.9 F)-12.8 C (9.0 F)n/an/a
Dec25.6 C (78.1 F)-18.3 C (-0.9 F)n/an/a

Which Years Hold Standing Records

1,464 standing records
Standing records at Knoxville UNIV of Tenn by the year they were set 1,464 records at Knoxville UNIV of Tenn still stand. 1954 holds the most, with 75. 0204060801943: 361944: 421945: 441946: 381947: 431948: 371949: 391950: 501951: 481952: 651953: 581954: 751955: 501956: 381957: 411958: 281959: 241960: 521961: 371962: 271963: 371964: 281965: 201966: 231967: 541968: 291969: 201970: 381971: 271972: 321973: 151974: 381975: 141976: 421977: 411978: 301979: 371980: 371981: 121982: 181943194719511955195919631967197119751979
1,464 records at Knoxville UNIV of Tenn still stand. 1954 holds the most, with 75.
Standing records at Knoxville UNIV of Tenn by the year they were set
Year setStanding records
194336
194442
194544
194638
194743
194837
194939
195050
195148
195265
195358
195475
195550
195638
195741
195828
195924
196052
196137
196227
196337
196428
196520
196623
196754
196829
196920
197038
197127
197232
197315
197438
197514
197642
197741
197830
197937
198037
198112
198218

Wettest Day of Each Month

Sep: 154.7 mm (6.1 in)
Record daily precipitation for each month at Knoxville UNIV of Tenn The wettest day on record for each calendar month at Knoxville UNIV of Tenn. The most was 154.7 mm (6.1 in) on 29 September 1944. 050100150200 Jan: 79.5 mm (3.1 in), 30 January 1950 Jan Feb: 64.3 mm (2.5 in), 13 February 1948 Feb Mar: 100.8 mm (4.0 in), 12 March 1963 Mar Apr: 56.1 mm (2.2 in), 13 April 1966 Apr May: 96.5 mm (3.8 in), 28 May 1973 May Jun: 87.6 mm (3.4 in), 8 June 1978 Jun Jul: 78.7 mm (3.1 in), 4 July 1943 Jul Aug: 75.2 mm (3.0 in), 22 August 1969 Aug Sep: 154.7 mm (6.1 in), 29 September 1944 Sep Oct: 62.7 mm (2.5 in), 3 October 1961 Oct Nov: 104.1 mm (4.1 in), 28 November 1948 Nov Dec: 91.9 mm (3.6 in), 30 December 1969 Dec
The wettest day on record for each calendar month at Knoxville UNIV of Tenn. The most was 154.7 mm (6.1 in) on 29 September 1944.
Record daily precipitation for each month at Knoxville UNIV of Tenn
MonthRecord daily precipitation (mm)Date
Jan79.5 mm (3.1 in)30 January 1950
Feb64.3 mm (2.5 in)13 February 1948
Mar100.8 mm (4.0 in)12 March 1963
Apr56.1 mm (2.2 in)13 April 1966
May96.5 mm (3.8 in)28 May 1973
Jun87.6 mm (3.4 in)8 June 1978
Jul78.7 mm (3.1 in)4 July 1943
Aug75.2 mm (3.0 in)22 August 1969
Sep154.7 mm (6.1 in)29 September 1944
Oct62.7 mm (2.5 in)3 October 1961
Nov104.1 mm (4.1 in)28 November 1948
Dec91.9 mm (3.6 in)30 December 1969

Period of Record Coverage

1943 to 1982
Days with data per year at Knoxville UNIV of Tenn 40 years of record at Knoxville UNIV of Tenn, 1943 to 1982. 3 years have data for under 90 percent of days and are left out of rankings: 1943, 1975, 1982. 1943: 237 of 365 days1944: 356 of 366 days1945: 346 of 365 days1946: 346 of 365 days1947: 345 of 365 days1948: 361 of 366 days1949: 360 of 365 days1950: 357 of 365 days1951: 365 of 365 days1952: 365 of 366 days1953: 364 of 365 days1954: 364 of 365 days1955: 362 of 365 days1956: 366 of 366 days1957: 363 of 365 days1958: 364 of 365 days1959: 359 of 365 days1960: 365 of 366 days1961: 359 of 365 days1962: 333 of 365 days1963: 364 of 365 days1964: 335 of 366 days1965: 362 of 365 days1966: 365 of 365 days1967: 365 of 365 days1968: 364 of 366 days1969: 362 of 365 days1970: 364 of 365 days1971: 365 of 365 days1972: 344 of 366 days1973: 347 of 365 days1974: 365 of 365 days1975: 316 of 365 days1976: 361 of 366 days1977: 364 of 365 days1978: 364 of 365 days1979: 364 of 365 days1980: 365 of 366 days1981: 365 of 365 days1982: 243 of 365 days19451950195519601965197019751980
40 years of record at Knoxville UNIV of Tenn, 1943 to 1982. 3 years have data for under 90 percent of days and are left out of rankings: 1943, 1975, 1982.
Days with data per year at Knoxville UNIV of Tenn
YearDays with dataShare of yearComplete
194323765%No
194435697%Yes
194534695%Yes
194634695%Yes
194734595%Yes
194836199%Yes
194936099%Yes
195035798%Yes
1951365100%Yes
1952365100%Yes
1953364100%Yes
1954364100%Yes
195536299%Yes
1956366100%Yes
195736399%Yes
1958364100%Yes
195935998%Yes
1960365100%Yes
196135998%Yes
196233391%Yes
1963364100%Yes
196433592%Yes
196536299%Yes
1966365100%Yes
1967365100%Yes
196836499%Yes
196936299%Yes
1970364100%Yes
1971365100%Yes
197234494%Yes
197334795%Yes
1974365100%Yes
197531687%No
197636199%Yes
1977364100%Yes
1978364100%Yes
1979364100%Yes
1980365100%Yes
1981365100%Yes
198224367%No

Latest Records

20
Latest records at Knoxville UNIV of Tenn
DateStationRecordValueBeat old record byOld record stoodSignificance
26 August 1982Knoxville UNIV of Tenn, USdaily low min15.0 C (59.0 F)0.6 C (1.1 F)16 years10 of 100 (Routine)
18 August 1982Knoxville UNIV of Tenn, USdaily rain42.2 mm (1.7 in)1.8 mm (0.07 in)7 years7 of 100 (Routine)
5 August 1982Knoxville UNIV of Tenn, USdaily high min (Tie)23.3 C (73.9 F)tie28 years3 of 100 (Routine)
1 August 1982Knoxville UNIV of Tenn, USdaily rain50.8 mm (2.0 in)30.0 mm (1.2 in)8 years32 of 100 (Routine)
31 July 1982Knoxville UNIV of Tenn, USdaily rain50.8 mm (2.0 in)17.3 mm (0.7 in)32 years26 of 100 (Routine)
28 July 1982Knoxville UNIV of Tenn, USdaily high min (Tie)23.3 C (73.9 F)tie24 years2 of 100 (Routine)
26 July 1982Knoxville UNIV of Tenn, USdaily high min23.9 C (75.0 F)1.1 C (2.0 F)32 years18 of 100 (Routine)
9 July 1982Knoxville UNIV of Tenn, USdaily rain47.5 mm (1.9 in)12.7 mm (0.5 in)28 years21 of 100 (Routine)
13 June 1982Knoxville UNIV of Tenn, USdaily rain23.9 mm (0.9 in)1.3 mm (0.05 in)4 years6 of 100 (Routine)
7 June 1982Knoxville UNIV of Tenn, USdaily low min (Tie)12.8 C (55.0 F)tie37 years3 of 100 (Routine)
31 May 1982Knoxville UNIV of Tenn, USdaily high min22.2 C (72.0 F)0.5 C (0.9 F)28 years13 of 100 (Routine)
22 May 1982Knoxville UNIV of Tenn, USdaily rain8.9 mm (0.35 in)0.8 mm (0.03 in)16 years9 of 100 (Routine)
16 May 1982Knoxville UNIV of Tenn, USdaily rain55.1 mm (2.2 in)26.4 mm (1.0 in)36 years39 of 100 (Notable)
26 April 1982Knoxville UNIV of Tenn, USdaily rain19.3 mm (0.8 in)2.5 mm (0.10 in)4 years7 of 100 (Routine)
24 April 1982Knoxville UNIV of Tenn, USdaily low min2.2 C (36.0 F)1.7 C (3.1 F)19 years12 of 100 (Routine)
23 April 1982Knoxville UNIV of Tenn, USdaily low min2.2 C (36.0 F)2.2 C (4.0 F)23 years14 of 100 (Routine)
10 April 1982Knoxville UNIV of Tenn, USdaily low max11.1 C (52.0 F)1.1 C (2.0 F)3 years6 of 100 (Routine)
8 April 1982Knoxville UNIV of Tenn, USdaily low max9.4 C (48.9 F)1.7 C (3.1 F)24 years14 of 100 (Routine)
7 April 1982Knoxville UNIV of Tenn, USmonthly low min-3.3 C (26.1 F)1.1 C (2.0 F)32 years25 of 100 (Routine)
7 April 1982Knoxville UNIV of Tenn, USdaily low max7.2 C (45.0 F)2.2 C (4.0 F)29 years16 of 100 (Routine)

Climate Trend

32 complete years, 1944 to 1981
Annual mean temperature at Knoxville UNIV of Tenn as warming stripes, 1944 to 1981 One stripe for each of 32 complete years at Knoxville UNIV of Tenn, 1944 to 1981. Blue stripes are years cooler than the station's own mean of 15.2 C (59.4 F); red stripes are warmer. The coolest year was 1979, at 14.2 C (57.5 F), and the warmest was 1957, at 16.5 C (61.7 F). The strongest colour marks a difference of 1.3 C (2.3 F). 1944: 15.5 C, +0.3 C from the station mean1946: 15.6 C, +0.4 C from the station mean1947: 14.9 C, -0.3 C from the station mean1948: 15.6 C, +0.3 C from the station mean1949: 16.3 C, +1.1 C from the station mean1950: 14.8 C, -0.4 C from the station mean1951: 15.2 C, -0.1 C from the station mean1952: 16.0 C, +0.8 C from the station mean1953: 16.4 C, +1.2 C from the station mean1954: 16.2 C, +0.9 C from the station mean1955: 15.9 C, +0.7 C from the station mean1956: 16.1 C, +0.9 C from the station mean1957: 16.5 C, +1.3 C from the station mean1958: 14.8 C, -0.4 C from the station mean1959: 15.6 C, +0.3 C from the station mean1960: 14.7 C, -0.5 C from the station mean1961: 14.9 C, -0.3 C from the station mean1963: 14.3 C, -0.9 C from the station mean1965: 15.4 C, +0.2 C from the station mean1966: 14.8 C, -0.4 C from the station mean1967: 15.0 C, -0.3 C from the station mean1968: 14.5 C, -0.7 C from the station mean1969: 14.6 C, -0.6 C from the station mean1970: 15.2 C, 0.0 C from the station mean1971: 15.3 C, +0.1 C from the station mean1974: 15.2 C, 0.0 C from the station mean1976: 14.2 C, -1.0 C from the station mean1977: 15.0 C, -0.3 C from the station mean1978: 14.6 C, -0.6 C from the station mean1979: 14.2 C, -1.1 C from the station mean1980: 15.1 C, -0.2 C from the station mean1981: 14.7 C, -0.6 C from the station mean19441950195519601965197019751980
One stripe for each of 32 complete years at Knoxville UNIV of Tenn, 1944 to 1981. Blue stripes are years cooler than the station's own mean of 15.2 C (59.4 F); red stripes are warmer. The coolest year was 1979, at 14.2 C (57.5 F), and the warmest was 1957, at 16.5 C (61.7 F). The strongest colour marks a difference of 1.3 C (2.3 F).
Annual mean temperature at Knoxville UNIV of Tenn as warming stripes, 1944 to 1981
YearAnnual mean temperatureDifference from the station mean
194415.5 C+0.29 C
194615.6 C+0.42 C
194714.9 C-0.31 C
194815.6 C+0.34 C
194916.3 C+1.08 C
195014.8 C-0.40 C
195115.2 C-0.07 C
195216.0 C+0.81 C
195316.4 C+1.15 C
195416.2 C+0.94 C
195515.9 C+0.65 C
195616.1 C+0.91 C
195716.5 C+1.26 C
195814.8 C-0.38 C
195915.6 C+0.34 C
196014.7 C-0.50 C
196114.9 C-0.34 C
196314.3 C-0.91 C
196515.4 C+0.20 C
196614.8 C-0.42 C
196715.0 C-0.27 C
196814.5 C-0.70 C
196914.6 C-0.65 C
197015.2 C+0.00 C
197115.3 C+0.12 C
197415.2 C+0.01 C
197614.2 C-0.98 C
197715.0 C-0.27 C
197814.6 C-0.63 C
197914.2 C-1.07 C
198015.1 C-0.16 C
198114.7 C-0.56 C

The annual mean temperature here has fallen by 0.3 C (0.2 to 0.5) per decade over 1944 to 1981. In Fahrenheit: 0.6 F (0.3 to 0.9) per decade. The slope is a straight line fitted to 32 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Knoxville UNIV of Tenn
MeasurePer decade (C)Per decade (F)PeriodComplete yearsReading
Annual mean temperature-0.3 C (-0.5 to -0.2) per decade-0.6 F (-0.9 to -0.3) per decade1944 to 198132Fall
Mean daily maximum-0.5 C (-0.7 to -0.3) per decade-1.0 F (-1.3 to -0.6) per decade1944 to 198132Fall
Mean daily minimum-0.14 C (-0.32 to 0.03) per decade-0.3 F (-0.6 to 0.1) per decade1944 to 198132Not 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

1943 to 1982
Yearly extremes at Knoxville UNIV of Tenn: the record and the median year
MeasureRecordYear of the recordMedian yearYears with a value
Hottest day (TXx)40.6 C (105.1 F)195236.1 C (97.0 F)40
Coldest night (TNn)-22.2 C (-8.0 F)1963-13.9 C (7.0 F)40
Wettest day (Rx1day)154.7 mm (6.1 in)194463.3 mm (2.5 in)40
Wettest five days (Rx5day)175.0 mm (6.9 in)1944114.6 mm (4.5 in)40
Longest dry spell (CDD)31 days195317 days40

Hottest day (TXx)

Hottest day (TXx) at Knoxville UNIV of Tenn by year The hottest day of the year at Knoxville UNIV of Tenn, 1943 to 1982. The record is 40.6 C (105.1 F) in 1952, marked on the chart; the median year is 36.1 C (97.0 F). 3234363840421950196019701980Record: 40.6 C (105.1 F) in 1952
The hottest day of the year at Knoxville UNIV of Tenn, 1943 to 1982. The record is 40.6 C (105.1 F) in 1952, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Knoxville UNIV of Tenn by year
YearHottest day (TXx)
194337.8 C (100.0 F)
194437.2 C (99.0 F)
194536.1 C (97.0 F)
194634.4 C (93.9 F)
194736.1 C (97.0 F)
194837.8 C (100.0 F)
194937.8 C (100.0 F)
195032.8 C (91.0 F)
195136.1 C (97.0 F)
195240.6 C (105.1 F)
195337.2 C (99.0 F)
195440.0 C (104.0 F)
195537.2 C (99.0 F)
195638.3 C (100.9 F)
195738.3 C (100.9 F)
195836.7 C (98.1 F)
195937.8 C (100.0 F)
196036.1 C (97.0 F)
196133.3 C (91.9 F)
196234.4 C (93.9 F)
196333.3 C (91.9 F)
196435.0 C (95.0 F)
196535.0 C (95.0 F)
196636.7 C (98.1 F)
196732.8 C (91.0 F)
196837.2 C (99.0 F)
196937.2 C (99.0 F)
197035.6 C (96.1 F)
197132.8 C (91.0 F)
197233.9 C (93.0 F)
197333.3 C (91.9 F)
197436.1 C (97.0 F)
197535.6 C (96.1 F)
197634.4 C (93.9 F)
197735.6 C (96.1 F)
197835.6 C (96.1 F)
197933.3 C (91.9 F)
198038.3 C (100.9 F)
198135.0 C (95.0 F)
198233.9 C (93.0 F)

Coldest night (TNn)

Coldest night (TNn) at Knoxville UNIV of Tenn by year The coldest night of the year at Knoxville UNIV of Tenn, 1943 to 1982. The record is -22.2 C (-8.0 F) in 1963, marked on the chart; the median year is -13.9 C (7.0 F). -25-20-15-10-501950196019701980Record: -22.2 C (-8.0 F) in 1963
The coldest night of the year at Knoxville UNIV of Tenn, 1943 to 1982. The record is -22.2 C (-8.0 F) in 1963, marked on the chart; the median year is -13.9 C (7.0 F).
Coldest night (TNn) at Knoxville UNIV of Tenn by year
YearColdest night (TNn)
1943-2.8 C (27.0 F)
1944-10.6 C (12.9 F)
1945-11.7 C (10.9 F)
1946-8.9 C (16.0 F)
1947-13.9 C (7.0 F)
1948-13.9 C (7.0 F)
1949-6.1 C (21.0 F)
1950-12.8 C (9.0 F)
1951-15.0 C (5.0 F)
1952-8.9 C (16.0 F)
1953-11.1 C (12.0 F)
1954-11.1 C (12.0 F)
1955-13.3 C (8.1 F)
1956-7.8 C (18.0 F)
1957-13.9 C (7.0 F)
1958-17.2 C (1.0 F)
1959-15.0 C (5.0 F)
1960-16.1 C (3.0 F)
1961-14.4 C (6.1 F)
1962-18.3 C (-0.9 F)
1963-22.2 C (-8.0 F)
1964-13.3 C (8.1 F)
1965-13.9 C (7.0 F)
1966-22.2 C (-8.0 F)
1967-15.6 C (3.9 F)
1968-12.8 C (9.0 F)
1969-13.3 C (8.1 F)
1970-18.9 C (-2.0 F)
1971-13.9 C (7.0 F)
1972-17.2 C (1.0 F)
1973-10.6 C (12.9 F)
1974-7.8 C (18.0 F)
1975-10.6 C (12.9 F)
1976-13.3 C (8.1 F)
1977-19.4 C (-2.9 F)
1978-14.4 C (6.1 F)
1979-13.3 C (8.1 F)
1980-15.0 C (5.0 F)
1981-15.6 C (3.9 F)
1982-21.1 C (-6.0 F)

Wettest day (Rx1day)

Wettest day (Rx1day) at Knoxville UNIV of Tenn by year The wettest day of the year at Knoxville UNIV of Tenn, 1943 to 1982. The record is 154.7 mm (6.1 in) in 1944, marked on the chart; the median year is 63.3 mm (2.5 in). 0501001502001950196019701980Record: 154.7 mm (6.1 in) in 1944
The wettest day of the year at Knoxville UNIV of Tenn, 1943 to 1982. The record is 154.7 mm (6.1 in) in 1944, marked on the chart; the median year is 63.3 mm (2.5 in).
Wettest day (Rx1day) at Knoxville UNIV of Tenn by year
YearWettest day (Rx1day)
194378.7 mm (3.1 in)
1944154.7 mm (6.1 in)
194586.6 mm (3.4 in)
194674.9 mm (2.9 in)
194756.6 mm (2.2 in)
1948104.1 mm (4.1 in)
194956.9 mm (2.2 in)
195079.5 mm (3.1 in)
195153.3 mm (2.1 in)
195255.4 mm (2.2 in)
195350.5 mm (2.0 in)
195469.9 mm (2.8 in)
195539.1 mm (1.5 in)
195686.9 mm (3.4 in)
195760.5 mm (2.4 in)
195839.4 mm (1.6 in)
195966.5 mm (2.6 in)
196071.6 mm (2.8 in)
196169.1 mm (2.7 in)
196247.2 mm (1.9 in)
1963100.8 mm (4.0 in)
196455.1 mm (2.2 in)
196566.3 mm (2.6 in)
196661.2 mm (2.4 in)
196776.7 mm (3.0 in)
196858.4 mm (2.3 in)
196991.9 mm (3.6 in)
197041.9 mm (1.6 in)
197145.7 mm (1.8 in)
197286.1 mm (3.4 in)
197396.5 mm (3.8 in)
197451.3 mm (2.0 in)
197565.5 mm (2.6 in)
197647.8 mm (1.9 in)
197753.6 mm (2.1 in)
197887.6 mm (3.4 in)
197965.0 mm (2.6 in)
198056.1 mm (2.2 in)
198161.5 mm (2.4 in)
198255.1 mm (2.2 in)

Wettest five days (Rx5day)

Wettest five days (Rx5day) at Knoxville UNIV of Tenn by year The wettest five days of the year at Knoxville UNIV of Tenn, 1943 to 1982. The record is 175.0 mm (6.9 in) in 1944, marked on the chart; the median year is 114.6 mm (4.5 in). 501001502001950196019701980Record: 175.0 mm (6.9 in) in 1944
The wettest five days of the year at Knoxville UNIV of Tenn, 1943 to 1982. The record is 175.0 mm (6.9 in) in 1944, marked on the chart; the median year is 114.6 mm (4.5 in).
Wettest five days (Rx5day) at Knoxville UNIV of Tenn by year
YearWettest five days (Rx5day)
1943108.1 mm (4.3 in)
1944175.0 mm (6.9 in)
1945113.0 mm (4.4 in)
1946126.3 mm (5.0 in)
194792.9 mm (3.7 in)
1948133.9 mm (5.3 in)
1949128.3 mm (5.1 in)
1950150.9 mm (5.9 in)
195177.2 mm (3.0 in)
195275.8 mm (3.0 in)
195373.2 mm (2.9 in)
1954124.5 mm (4.9 in)
195568.7 mm (2.7 in)
1956136.1 mm (5.4 in)
1957143.8 mm (5.7 in)
195881.6 mm (3.2 in)
1959117.1 mm (4.6 in)
1960118.7 mm (4.7 in)
1961125.0 mm (4.9 in)
1962105.1 mm (4.1 in)
1963116.1 mm (4.6 in)
196488.2 mm (3.5 in)
1965135.1 mm (5.3 in)
196698.9 mm (3.9 in)
1967107.4 mm (4.2 in)
196886.6 mm (3.4 in)
1969163.5 mm (6.4 in)
1970163.0 mm (6.4 in)
197181.2 mm (3.2 in)
1972151.9 mm (6.0 in)
1973159.6 mm (6.3 in)
1974100.6 mm (4.0 in)
1975131.6 mm (5.2 in)
197668.9 mm (2.7 in)
1977100.3 mm (3.9 in)
197892.9 mm (3.7 in)
197995.8 mm (3.8 in)
1980107.6 mm (4.2 in)
1981117.6 mm (4.6 in)
1982129.5 mm (5.1 in)

Longest dry spell (CDD)

Longest dry spell (CDD) at Knoxville UNIV of Tenn by year The longest dry spell of the year at Knoxville UNIV of Tenn, 1943 to 1982. The record is 31 days in 1953, marked on the chart; the median year is 17 days. 1015202530351950196019701980Record: 31 days in 1953
The longest dry spell of the year at Knoxville UNIV of Tenn, 1943 to 1982. The record is 31 days in 1953, marked on the chart; the median year is 17 days.
Longest dry spell (CDD) at Knoxville UNIV of Tenn by year
YearLongest dry spell (CDD)
194322 days
194419 days
194515 days
194615 days
194716 days
194820 days
194913 days
195016 days
195112 days
195230 days
195331 days
195426 days
195513 days
195617 days
195717 days
195827 days
195921 days
196024 days
196120 days
196215 days
196331 days
196421 days
196518 days
196614 days
196717 days
196825 days
196912 days
197025 days
197116 days
197214 days
197313 days
197421 days
197512 days
197616 days
197720 days
197812 days
197914 days
198022 days
198115 days
198213 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

32 years with a frost

Across 32 years with a frost, the median last spring frost at Knoxville UNIV of Tenn falls on 25 March and the median first autumn frost on 6 November, which leaves a median of 224 days between them.

Fitted over all years, the growing season changes by +4.5 days per decade at this station.

Frost dates and growing season at Knoxville UNIV of Tenn
MeasureMedian, all yearsEarliest periodRecent period (1947 to 1981)Recent against earliestFitted trend
Last spring frost25 Marchn/a25 Marchn/a-2.8 days per decade
First autumn frost6 Novembern/a5 Novembern/a+1.7 days per decade
Growing days224 daysn/a224 daysn/a+4.5 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

37 years, 1944 to 1981

A day with at least 63.3 mm (2.5 in) of rain is expected about once in 2 years. A day with at least 149.8 mm (5.9 in) of rain is expected about once in 100 years.

Rainfall return levels at Knoxville UNIV of Tenn: the daily rain expected about once in a given number of years
Expected about once inA day with at leastNote
2 years63.3 mm (2.5 in)
5 years82.7 mm (3.3 in)
10 years96.9 mm (3.8 in)
25 years116.6 mm (4.6 in)
50 years132.7 mm (5.2 in)Longer than the 37 years of record
100 years149.8 mm (5.9 in)Longer than the 37 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, 37 years of values from 1944 to 1981.

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: 154.7 mm (6.1 in) in 1944; 104.1 mm (4.1 in) in 1948; 100.8 mm (4.0 in) in 1963.

Download the Data

  • Data for Knoxville UNIV of Tenn standing records by year: CSV or JSON. Field meanings are on the data page.
  • Data for Knoxville UNIV of Tenn 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).