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Built 2026-10-19 (19 October 2026)

Maryville Threshold Days by Year (ASN00061223)

13 fixed thresholds counted per year at Maryville (ASN00061223): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Maryville Thresholds

  • Maryville: days with 10 mm (0.39 in) or more of precipitation in 29 years, most in 1978 with 44.
  • Maryville: days with 25 mm (0.98 in) or more of precipitation in 29 years, most in 1974 with 20.
  • Maryville: days with 50 mm (1.97 in) or more of precipitation in 29 years, most in 1992 with 7.
  • Maryville: days with a maximum temperature at or above 30 C (86 F) in 24 years, most in 1980 with 41.
  • 13 fixed thresholds have at least one qualifying day at Maryville.
24 years with a qualifying day
Days at or above 30 C (86 F) per year at Maryville Days per year at Maryville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 41 in 1980. 02040601969: 291970: 281971: 291972: 181973: 261974: 101975: 271976: 171977: 321978: 241979: 331980: 411981: 241982: 281983: 261984: 261985: 211986: 231987: 291988: 261989: 141990: 241991: 361992: 1219691972197519781981198419871990
Days per year at Maryville with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 41 in 1980.
Days at or above 30 C (86 F) per year at Maryville
YearDaysDecade average
19692929
19702824.4
19712924.4
19721824.4
19732624.4
19741024.4
19752724.4
19761724.4
19773224.4
19782424.4
19793324.4
19804125.8
19812425.8
19822825.8
19832625.8
19842625.8
19852125.8
19862325.8
19872925.8
19882625.8
19891425.8
19902424
19913624
19921224
First to last qualifying date each year at Maryville For each year, a bar from the first to the last day at Maryville meeting 30 C (86 F). 1969: 3 January 1969 to 23 December 19691970: 4 January 1970 to 28 December 19701971: 1 January 1971 to 31 December 19711972: 12 January 1972 to 30 December 19721973: 9 January 1973 to 28 December 19731974: 2 February 1974 to 28 December 19741975: 1 January 1975 to 30 December 19751976: 15 January 1976 to 28 December 19761977: 29 January 1977 to 27 December 19771978: 1 January 1978 to 22 December 19781979: 6 January 1979 to 23 December 19791980: 13 January 1980 to 21 December 19801981: 3 January 1981 to 19 December 19811982: 1 January 1982 to 24 December 19821983: 22 January 1983 to 25 December 19831984: 3 January 1984 to 26 December 19841985: 3 January 1985 to 31 December 19851986: 2 January 1986 to 17 December 19861987: 8 January 1987 to 27 December 19871988: 8 January 1988 to 26 December 19881989: 10 January 1989 to 27 December 19891990: 1 January 1990 to 31 December 19901991: 1 January 1991 to 15 December 19911992: 21 January 1992 to 28 December 199219691972197519781981198419871990JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Maryville meeting 30 C (86 F).
First to last qualifying date each year at Maryville
YearFirst dateLast date
19691969-01-031969-12-23
19701970-01-041970-12-28
19711971-01-011971-12-31
19721972-01-121972-12-30
19731973-01-091973-12-28
19741974-02-021974-12-28
19751975-01-011975-12-30
19761976-01-151976-12-28
19771977-01-291977-12-27
19781978-01-011978-12-22
19791979-01-061979-12-23
19801980-01-131980-12-21
19811981-01-031981-12-19
19821982-01-011982-12-24
19831983-01-221983-12-25
19841984-01-031984-12-26
19851985-01-031985-12-31
19861986-01-021986-12-17
19871987-01-081987-12-27
19881988-01-081988-12-26
19891989-01-101989-12-27
19901990-01-011990-12-31
19911991-01-011991-12-15
19921992-01-211992-12-28

Every Fixed Threshold

Fixed thresholds at Maryville
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2441198012
35 C (95 F): Days241319801
40 C (104 F): Days8319802
90 F (32.2 C): Days242919804
100 F (37.8 C): Days20619792
0 C (32 F): Frost days (min1119861
20 C (68 F): Tropical nights (min2461198131
25 C (77 F): Days with min6219871
10 mm (0.39 in): Days with 10 mm or more rain2944197830
25 mm (0.98 in): Days with 25 mm or more rain2920197412
50 mm (1.97 in): Days with 50 mm or more rain29719927
100 mm (3.94 in): Days with 100 mm or more rain5219782
200 mm (7.87 in): Days with 200 mm or more rain1119901

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1969.

Download the Data

  • Data for Maryville 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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

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