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Built 2026-10-19 (19 October 2026)

Heflin Threshold Days by Year (USC00013775)

17 fixed thresholds counted per year at Heflin (USC00013775): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Heflin Thresholds

  • Heflin: days with 10 mm (0.39 in) or more of precipitation in 60 years, most in 1957 with 61.
  • Heflin: days with 25 mm (0.98 in) or more of precipitation in 60 years, most in 1973 with 26.
  • Heflin: days with a maximum temperature at or above 30 C (86 F) in 59 years, most in 2018 with 129.
  • Heflin: days with a maximum temperature at or above 90 F (32.2 C) in 59 years, most in 1960 with 96.
  • 17 fixed thresholds have at least one qualifying day at Heflin.
59 years with a qualifying day
Days at or above 30 C (86 F) per year at Heflin Days per year at Heflin with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 129 in 2018. 0501001501956: 1101957: 1101958: 1051960: 1251962: 981963: 741964: 991965: 1071966: 831967: 701968: 1011969: 1061970: 1091971: 1121972: 1021973: 1151974: 851975: 851976: 671977: 1131978: 1101979: 741982: 1061983: 791987: 1071988: 871989: 751990: 1071991: 761992: 531993: 991994: 511995: 911996: 821997: 671998: 1071999: 752000: 942001: 582002: 892003: 602004: 512005: 782006: 902007: 952008: 772009: 562010: 1172014: 712015: 812016: 1172018: 1292019: 1202020: 752021: 522022: 802023: 802024: 732025: 701956196419701976198719931999200520142021
Days per year at Heflin with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 129 in 2018.
Days at or above 30 C (86 F) per year at Heflin
YearDaysDecade average
1956110108.3
1957110108.3
1958105108.3
196012595.9
19629895.9
19637495.9
19649995.9
196510795.9
19668395.9
19677095.9
196810195.9
196910695.9
197010997.2
197111297.2
197210297.2
197311597.2
19748597.2
19758597.2
19766797.2
197711397.2
197811097.2
19797497.2
198210690.8
19837990.8
198710790.8
19888790.8
19897590.8
199010780.8
19917680.8
19925380.8
19939980.8
19945180.8
19959180.8
19968280.8
19976780.8
199810780.8
19997580.8
20009474.8
20015874.8
20028974.8
20036074.8
20045174.8
20057874.8
20069074.8
20079574.8
20087774.8
20095674.8
2010117105.8
201471105.8
201581105.8
2016117105.8
2018129105.8
2019120105.8
20207571.7
20215271.7
20228071.7
20238071.7
20247371.7
20257071.7
First to last qualifying date each year at Heflin For each year, a bar from the first to the last day at Heflin meeting 30 C (86 F). 1956: 29 April 1956 to 22 September 19561957: 26 April 1957 to 22 September 19571958: 24 April 1958 to 27 September 19581960: 22 April 1960 to 14 October 19601962: 7 May 1962 to 11 October 19621963: 31 March 1963 to 23 September 19631964: 23 April 1964 to 24 September 19641965: 10 April 1965 to 19 October 19651966: 8 May 1966 to 12 September 19661967: 7 April 1967 to 8 October 19671968: 19 April 1968 to 3 October 19681969: 7 May 1969 to 13 October 19691970: 29 April 1970 to 3 October 19701971: 19 April 1971 to 6 October 19711972: 14 April 1972 to 29 September 19721973: 11 May 1973 to 11 October 19731974: 10 March 1974 to 3 November 19741975: 28 April 1975 to 15 October 19751976: 20 April 1976 to 9 September 19761977: 13 April 1977 to 24 September 19771978: 8 April 1978 to 24 September 19781979: 11 May 1979 to 12 September 19791982: 19 March 1982 to 10 October 19821983: 4 June 1983 to 4 October 19831987: 21 April 1987 to 18 September 19871988: 5 April 1988 to 25 September 19881989: 27 April 1989 to 15 September 19891990: 1 May 1990 to 10 October 19901991: 16 May 1991 to 19 September 19911992: 20 May 1992 to 23 September 19921993: 7 May 1993 to 27 September 19931994: 22 April 1994 to 18 September 19941995: 24 March 1995 to 16 September 19951996: 29 April 1996 to 9 September 19961997: 14 June 1997 to 1 October 19971998: 14 May 1998 to 5 October 19981999: 3 April 1999 to 14 September 19992000: 12 May 2000 to 6 October 20002001: 11 April 2001 to 24 September 20012002: 18 April 2002 to 7 October 20022003: 18 May 2003 to 27 September 20032004: 9 May 2004 to 31 August 20042005: 13 May 2005 to 26 September 20052006: 21 May 2006 to 6 October 20062007: 26 March 2007 to 9 October 20072008: 31 May 2008 to 17 September 20082009: 25 April 2009 to 9 September 20092010: 6 April 2010 to 12 November 20102014: 14 May 2014 to 22 September 20142015: 9 April 2015 to 24 September 20152016: 16 March 2016 to 22 October 20162018: 10 May 2018 to 9 October 20182019: 9 May 2019 to 5 October 20192020: 28 March 2020 to 14 September 20202021: 14 April 2021 to 14 September 20212022: 20 May 2022 to 23 September 20222023: 6 April 2023 to 1 October 20232024: 25 May 2024 to 25 September 20242025: 6 April 2025 to 25 September 202519561966197419871995200320142023JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Heflin meeting 30 C (86 F).
First to last qualifying date each year at Heflin
YearFirst dateLast date
19561956-04-291956-09-22
19571957-04-261957-09-22
19581958-04-241958-09-27
19601960-04-221960-10-14
19621962-05-071962-10-11
19631963-03-311963-09-23
19641964-04-231964-09-24
19651965-04-101965-10-19
19661966-05-081966-09-12
19671967-04-071967-10-08
19681968-04-191968-10-03
19691969-05-071969-10-13
19701970-04-291970-10-03
19711971-04-191971-10-06
19721972-04-141972-09-29
19731973-05-111973-10-11
19741974-03-101974-11-03
19751975-04-281975-10-15
19761976-04-201976-09-09
19771977-04-131977-09-24
19781978-04-081978-09-24
19791979-05-111979-09-12
19821982-03-191982-10-10
19831983-06-041983-10-04
19871987-04-211987-09-18
19881988-04-051988-09-25
19891989-04-271989-09-15
19901990-05-011990-10-10
19911991-05-161991-09-19
19921992-05-201992-09-23
19931993-05-071993-09-27
19941994-04-221994-09-18
19951995-03-241995-09-16
19961996-04-291996-09-09
19971997-06-141997-10-01
19981998-05-141998-10-05
19991999-04-031999-09-14
20002000-05-122000-10-06
20012001-04-112001-09-24
20022002-04-182002-10-07
20032003-05-182003-09-27
20042004-05-092004-08-31
20052005-05-132005-09-26
20062006-05-212006-10-06
20072007-03-262007-10-09
20082008-05-312008-09-17
20092009-04-252009-09-09
20102010-04-062010-11-12
20142014-05-142014-09-22
20152015-04-092015-09-24
20162016-03-162016-10-22
20182018-05-102018-10-09
20192019-05-092019-10-05
20202020-03-282020-09-14
20212021-04-142021-09-14
20222022-05-202022-09-23
20232023-04-062023-10-01
20242024-05-252024-09-25
20252025-04-062025-09-25

Every Fixed Threshold

Fixed thresholds at Heflin
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days59129201870
35 C (95 F): Days442920105
40 C (104 F): Days2219662
90 F (32.2 C): Days5996196026
100 F (37.8 C): Days8519832
0 C (32 F): Ice days (max411119783
0 C (32 F): Frost days (min56123196856
-10 C (14 F): Days with min481819633
-20 C (-4 F): Days with min1119661
20 C (68 F): Tropical nights (min5676201049
25 C (77 F): Days with min1320103
10 mm (0.39 in): Days with 10 mm or more rain6061195741
25 mm (0.98 in): Days with 25 mm or more rain6026197314
50 mm (1.97 in): Days with 50 mm or more rain591219665
100 mm (3.94 in): Days with 100 mm or more rain22319792
10 cm (3.9 in): Days with 10 cm or more snowfall6219871
25 cm (9.8 in): Days with 25 cm or more snowfall2119641

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1956.

Download the Data

  • Data for Heflin 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).