Daily records
Page built 2026-10-19
Data as of 2025-12-31
Search
Built 2026-10-19 (19 October 2026)

Blackleaf Threshold Days by Year (USC00240877)

17 fixed thresholds counted per year at Blackleaf (USC00240877): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Blackleaf Thresholds

  • Blackleaf: days with 10 mm (0.39 in) or more of precipitation in 52 years, most in 1908 with 21.
  • Blackleaf: days with 25 mm (0.98 in) or more of precipitation in 40 years, most in 1908 with 8.
  • Blackleaf: days with a maximum temperature at or below 0 C (32 F) in 38 years, most in 1955 with 74.
  • Blackleaf: days with a maximum temperature at or above 30 C (86 F) in 37 years, most in 1984 with 38.
  • 17 fixed thresholds have at least one qualifying day at Blackleaf.
37 years with a qualifying day
Days at or above 30 C (86 F) per year at Blackleaf Days per year at Blackleaf with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 38 in 1984. 0102030401908: 91910: 81912: 21913: 31914: 111955: 101956: 121957: 91958: 101959: 171960: 171961: 281962: 31963: 171964: 41967: 271968: 131969: 201970: 231972: 71973: 201974: 201975: 71976: 61977: 81981: 211983: 201984: 381985: 201986: 221987: 101988: 271991: 141992: 111993: 31995: 81998: 261908191419581962196819731977198519911998
Days per year at Blackleaf with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 38 in 1984.
Days at or above 30 C (86 F) per year at Blackleaf
YearDaysDecade average
190899
191086
191226
191336
1914116
19551011.6
19561211.6
1957911.6
19581011.6
19591711.6
19601716.1
19612816.1
1962316.1
19631716.1
1964416.1
19672716.1
19681316.1
19692016.1
19702313
1972713
19732013
19742013
1975713
1976613
1977813
19812122.6
19832022.6
19843822.6
19852022.6
19862222.6
19871022.6
19882722.6
19911412.4
19921112.4
1993312.4
1995812.4
19982612.4
First to last qualifying date each year at Blackleaf For each year, a bar from the first to the last day at Blackleaf meeting 30 C (86 F). 1908: 8 July 1908 to 11 August 19081910: 26 June 1910 to 21 July 19101912: 24 June 1912 to 26 June 19121913: 6 July 1913 to 23 August 19131914: 12 July 1914 to 15 August 19141955: 14 July 1955 to 7 September 19551956: 9 June 1956 to 23 August 19561957: 5 July 1957 to 5 August 19571958: 7 August 1958 to 7 September 19581959: 12 June 1959 to 2 August 19591960: 7 July 1960 to 19 August 19601961: 15 June 1961 to 25 August 19611962: 25 June 1962 to 16 August 19621963: 7 July 1963 to 29 September 19631964: 12 July 1964 to 17 August 19641967: 12 July 1967 to 29 September 19671968: 19 June 1968 to 10 September 19681969: 4 June 1969 to 11 September 19691970: 4 June 1970 to 31 August 19701972: 8 July 1972 to 29 August 19721973: 28 June 1973 to 21 August 19731974: 16 June 1974 to 5 August 19741975: 4 July 1975 to 28 July 19751976: 11 July 1976 to 5 September 19761977: 1 June 1977 to 23 July 19771981: 26 June 1981 to 18 September 19811983: 5 July 1983 to 1 September 19831984: 29 May 1984 to 14 September 19841985: 18 June 1985 to 27 July 19851986: 27 May 1986 to 28 August 19861987: 14 June 1987 to 22 September 19871988: 7 June 1988 to 6 September 19881991: 3 July 1991 to 11 October 19911992: 9 June 1992 to 1 October 19921993: 29 July 1993 to 10 August 19931995: 9 July 1995 to 3 September 19951998: 16 July 1998 to 15 September 199819081955196019671973198119871995JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Blackleaf meeting 30 C (86 F).
First to last qualifying date each year at Blackleaf
YearFirst dateLast date
19081908-07-081908-08-11
19101910-06-261910-07-21
19121912-06-241912-06-26
19131913-07-061913-08-23
19141914-07-121914-08-15
19551955-07-141955-09-07
19561956-06-091956-08-23
19571957-07-051957-08-05
19581958-08-071958-09-07
19591959-06-121959-08-02
19601960-07-071960-08-19
19611961-06-151961-08-25
19621962-06-251962-08-16
19631963-07-071963-09-29
19641964-07-121964-08-17
19671967-07-121967-09-29
19681968-06-191968-09-10
19691969-06-041969-09-11
19701970-06-041970-08-31
19721972-07-081972-08-29
19731973-06-281973-08-21
19741974-06-161974-08-05
19751975-07-041975-07-28
19761976-07-111976-09-05
19771977-06-011977-07-23
19811981-06-261981-09-18
19831983-07-051983-09-01
19841984-05-291984-09-14
19851985-06-181985-07-27
19861986-05-271986-08-28
19871987-06-141987-09-22
19881988-06-071988-09-06
19911991-07-031991-10-11
19921992-06-091992-10-01
19931993-07-291993-08-10
19951995-07-091995-09-03
19981998-07-161998-09-15

Every Fixed Threshold

Fixed thresholds at Blackleaf
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days3738198426
35 C (95 F): Days11519851
90 F (32.2 C): Days2915196711
100 F (37.8 C): Days3119611
0 C (32 F): Ice days (max3874195531
0 C (32 F): Frost days (min362151913194
-10 C (14 F): Days with min3699195567
-20 C (-4 F): Days with min3645191322
-30 C (-22 F): Days with min321119721
-40 C (-40 F): Days with min4119111
20 C (68 F): Tropical nights (min2119081
10 mm (0.39 in): Days with 10 mm or more rain5221190810
25 mm (0.98 in): Days with 25 mm or more rain40819081
50 mm (1.97 in): Days with 50 mm or more rain14319531
100 mm (3.94 in): Days with 100 mm or more rain2119641
10 cm (3.9 in): Days with 10 cm or more snowfall30919591
25 cm (9.8 in): Days with 25 cm or more snowfall9219511

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1908.

Download the Data

  • Data for Blackleaf 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).