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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Herman Threshold Days by Year (USC00253800)

5 fixed thresholds counted per year at Herman (USC00253800): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Herman Thresholds

  • Herman: days with 10 mm (0.39 in) or more of precipitation in 23 years, most in 1965 with 37.
  • Herman: days with 25 mm (0.98 in) or more of precipitation in 23 years, most in 1977 with 14.
  • Herman: days with 50 mm (1.97 in) or more of precipitation in 16 years, most in 1951 with 4.
  • Herman: days with 10 cm (3.9 in) or more of snowfall in 5 years, most in 1950 with 3.
  • 5 fixed thresholds have at least one qualifying day at Herman.
23 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Herman Days per year at Herman with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 37 in 1965. 0102030401947: 241948: 271949: 211950: 201951: 261952: 221953: 211955: 151957: 281965: 371966: 161967: 161968: 221969: 231970: 271971: 251972: 251973: 261974: 161975: 211976: 111977: 291978: 2219471950195319651968197119741977
Days per year at Herman with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 37 in 1965.
Days with 10 mm (0.39 in) or more of precipitation per year at Herman
YearDaysDecade average
19472424
19482724
19492124
19502022
19512622
19522222
19532122
19551522
19572822
19653722.8
19661622.8
19671622.8
19682222.8
19692322.8
19702722.4
19712522.4
19722522.4
19732622.4
19741622.4
19752122.4
19761122.4
19772922.4
19782222.4
First to last qualifying date each year at Herman For each year, a bar from the first to the last day at Herman meeting 10 mm (0.39 in). 1947: 13 March 1947 to 4 December 19471948: 11 February 1948 to 19 November 19481949: 4 January 1949 to 19 October 19491950: 13 February 1950 to 2 October 19501951: 26 February 1951 to 21 October 19511952: 18 March 1952 to 26 November 19521953: 19 February 1953 to 3 December 19531955: 21 March 1955 to 21 September 19551957: 22 February 1957 to 31 December 19571965: 17 March 1965 to 11 December 19651966: 9 February 1966 to 4 September 19661967: 14 April 1967 to 7 October 19671968: 3 April 1968 to 22 December 19681969: 15 February 1969 to 30 October 19691970: 3 March 1970 to 19 November 19701971: 19 February 1971 to 30 December 19711972: 21 March 1972 to 29 December 19721973: 21 January 1973 to 20 November 19731974: 4 April 1974 to 15 December 19741975: 11 January 1975 to 14 December 19751976: 30 March 1976 to 25 September 19761977: 3 March 1977 to 17 December 19771978: 13 March 1978 to 23 October 197819471950195319651968197119741977JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Herman meeting 10 mm (0.39 in).
First to last qualifying date each year at Herman
YearFirst dateLast date
19471947-03-131947-12-04
19481948-02-111948-11-19
19491949-01-041949-10-19
19501950-02-131950-10-02
19511951-02-261951-10-21
19521952-03-181952-11-26
19531953-02-191953-12-03
19551955-03-211955-09-21
19571957-02-221957-12-31
19651965-03-171965-12-11
19661966-02-091966-09-04
19671967-04-141967-10-07
19681968-04-031968-12-22
19691969-02-151969-10-30
19701970-03-031970-11-19
19711971-02-191971-12-30
19721972-03-211972-12-29
19731973-01-211973-11-20
19741974-04-041974-12-15
19751975-01-111975-12-14
19761976-03-301976-09-25
19771977-03-031977-12-17
19781978-03-131978-10-23

Every Fixed Threshold

Fixed thresholds at Herman
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2337196522
25 mm (0.98 in): Days with 25 mm or more rain231419775
50 mm (1.97 in): Days with 50 mm or more rain16419512
10 cm (3.9 in): Days with 10 cm or more snowfall5319501
25 cm (9.8 in): Days with 25 cm or more snowfall2119491

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1947.

Download the Data

  • Data for Herman 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).