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Built 2026-10-19 (19 October 2026)

Groveton Threshold Days by Year (USC00413778)

17 fixed thresholds counted per year at Groveton (USC00413778): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Groveton Thresholds

  • Groveton: days with 10 mm (0.39 in) or more of precipitation in 51 years, most in 1979 with 59.
  • Groveton: days with 25 mm (0.98 in) or more of precipitation in 51 years, most in 1929 with 27.
  • Groveton: days with 50 mm (1.97 in) or more of precipitation in 49 years, most in 1929 with 8.
  • Groveton: days with a maximum temperature at or above 30 C (86 F) in 33 years, most in 1991 with 182.
  • 17 fixed thresholds have at least one qualifying day at Groveton.
33 years with a qualifying day
Days at or above 30 C (86 F) per year at Groveton Days per year at Groveton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 182 in 1991. 0501001502001968: 1231969: 1431970: 1191972: 1451973: 1201974: 1181975: 1211976: 1141977: 1471978: 1531979: 1211980: 1411981: 1341982: 1361983: 1201984: 1351985: 1361986: 1301987: 1381988: 1591989: 1401990: 1691991: 1821992: 1671993: 1501994: 1691995: 1681996: 1761997: 1381998: 1421999: 1462000: 1422001: 123196819731977198119851989199319972001
Days per year at Groveton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 182 in 1991.
Days at or above 30 C (86 F) per year at Groveton
YearDaysDecade average
1968123133
1969143133
1970119128.7
1972145128.7
1973120128.7
1974118128.7
1975121128.7
1976114128.7
1977147128.7
1978153128.7
1979121128.7
1980141136.9
1981134136.9
1982136136.9
1983120136.9
1984135136.9
1985136136.9
1986130136.9
1987138136.9
1988159136.9
1989140136.9
1990169160.7
1991182160.7
1992167160.7
1993150160.7
1994169160.7
1995168160.7
1996176160.7
1997138160.7
1998142160.7
1999146160.7
2000142132.5
2001123132.5
First to last qualifying date each year at Groveton For each year, a bar from the first to the last day at Groveton meeting 30 C (86 F). 1968: 13 May 1968 to 30 October 19681969: 20 May 1969 to 9 November 19691970: 16 April 1970 to 24 September 19701972: 28 March 1972 to 31 October 19721973: 9 May 1973 to 10 October 19731974: 19 March 1974 to 28 September 19741975: 6 May 1975 to 24 October 19751976: 12 March 1976 to 4 October 19761977: 8 May 1977 to 31 October 19771978: 24 April 1978 to 3 November 19781979: 12 April 1979 to 21 October 19791980: 29 April 1980 to 9 November 19801981: 30 March 1981 to 18 October 19811982: 5 April 1982 to 29 October 19821983: 9 May 1983 to 20 October 19831984: 19 April 1984 to 18 October 19841985: 15 April 1985 to 24 October 19851986: 18 February 1986 to 6 October 19861987: 16 April 1987 to 19 October 19871988: 23 April 1988 to 9 November 19881989: 30 March 1989 to 14 November 19891990: 9 March 1990 to 4 November 19901991: 5 March 1991 to 29 October 19911992: 10 April 1992 to 31 October 19921993: 28 March 1993 to 19 October 19931994: 18 March 1994 to 23 October 19941995: 21 March 1995 to 28 October 19951996: 20 February 1996 to 31 October 19961997: 22 March 1997 to 1 November 19971998: 7 April 1998 to 16 October 19981999: 8 April 1999 to 22 October 19992000: 23 April 2000 to 15 October 20002001: 15 April 2001 to 24 October 20011968197419791984198919941999JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Groveton meeting 30 C (86 F).
First to last qualifying date each year at Groveton
YearFirst dateLast date
19681968-05-131968-10-30
19691969-05-201969-11-09
19701970-04-161970-09-24
19721972-03-281972-10-31
19731973-05-091973-10-10
19741974-03-191974-09-28
19751975-05-061975-10-24
19761976-03-121976-10-04
19771977-05-081977-10-31
19781978-04-241978-11-03
19791979-04-121979-10-21
19801980-04-291980-11-09
19811981-03-301981-10-18
19821982-04-051982-10-29
19831983-05-091983-10-20
19841984-04-191984-10-18
19851985-04-151985-10-24
19861986-02-181986-10-06
19871987-04-161987-10-19
19881988-04-231988-11-09
19891989-03-301989-11-14
19901990-03-091990-11-04
19911991-03-051991-10-29
19921992-04-101992-10-31
19931993-03-281993-10-19
19941994-03-181994-10-23
19951995-03-211995-10-28
19961996-02-201996-10-31
19971997-03-221997-11-01
19981998-04-071998-10-16
19991999-04-081999-10-22
20002000-04-232000-10-15
20012001-04-152001-10-24

Every Fixed Threshold

Fixed thresholds at Groveton
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days331821991123
35 C (95 F): Days33103199034
40 C (104 F): Days1215199611
90 F (32.2 C): Days33144199080
100 F (37.8 C): Days254819982
110 F (43.3 C): Days1220002
0 C (32 F): Ice days (max11619831
0 C (32 F): Frost days (min3353197825
-10 C (14 F): Days with min12619831
20 C (68 F): Tropical nights (min331391998101
25 C (77 F): Days with min151119982
10 mm (0.39 in): Days with 10 mm or more rain5159197944
25 mm (0.98 in): Days with 25 mm or more rain5127192923
50 mm (1.97 in): Days with 50 mm or more rain49819297
100 mm (3.94 in): Days with 100 mm or more rain20319291
200 mm (7.87 in): Days with 200 mm or more rain1119941
10 cm (3.9 in): Days with 10 cm or more snowfall4119291

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1968.

Download the Data

  • Data for Groveton 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 (2025-12-31).