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Built 2026-10-19 (19 October 2026)

Hanover 4 S Threshold Days by Year (USC00143398)

6 fixed thresholds counted per year at Hanover 4 S (USC00143398): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Hanover 4 S Thresholds

  • Hanover 4 S: days with 10 mm (0.39 in) or more of precipitation in 45 years, most in 1944 with 41.
  • Hanover 4 S: days with 25 mm (0.98 in) or more of precipitation in 45 years, most in 1985 with 13.
  • Hanover 4 S: days with 50 mm (1.97 in) or more of precipitation in 35 years, most in 1950 with 7.
  • Hanover 4 S: days with 10 cm (3.9 in) or more of snowfall in 21 years, most in 1942 with 4.
  • 6 fixed thresholds have at least one qualifying day at Hanover 4 S.
45 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Hanover 4 S Days per year at Hanover 4 S with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 41 in 1944. 02040601940: 221941: 281942: 221943: 271944: 411945: 251946: 221947: 221948: 201949: 331950: 211951: 391952: 221953: 211954: 191955: 151956: 141957: 241958: 261964: 181966: 141967: 251968: 251969: 281970: 271971: 211972: 271973: 361974: 81976: 191977: 261978: 251979: 251980: 191981: 301982: 301983: 251984: 281985: 331986: 311987: 281988: 141989: 251990: 281991: 18194019451950195519661971197719821987
Days per year at Hanover 4 S with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 41 in 1944.
Days with 10 mm (0.39 in) or more of precipitation per year at Hanover 4 S
YearDaysDecade average
19402226.2
19412826.2
19422226.2
19432726.2
19444126.2
19452526.2
19462226.2
19472226.2
19482026.2
19493326.2
19502122.3
19513922.3
19522222.3
19532122.3
19541922.3
19551522.3
19561422.3
19572422.3
19582622.3
19641822
19661422
19672522
19682522
19692822
19702723.8
19712123.8
19722723.8
19733623.8
1974823.8
19761923.8
19772623.8
19782523.8
19792523.8
19801926.3
19813026.3
19823026.3
19832526.3
19842826.3
19853326.3
19863126.3
19872826.3
19881426.3
19892526.3
19902823
19911823
First to last qualifying date each year at Hanover 4 S For each year, a bar from the first to the last day at Hanover 4 S meeting 10 mm (0.39 in). 1940: 3 February 1940 to 15 December 19401941: 25 January 1941 to 23 December 19411942: 1 January 1942 to 5 December 19421943: 2 February 1943 to 9 December 19431944: 27 January 1944 to 4 December 19441945: 21 February 1945 to 1 December 19451946: 6 March 1946 to 9 November 19461947: 6 March 1947 to 4 December 19471948: 1 January 1948 to 5 November 19481949: 4 January 1949 to 22 December 19491950: 4 April 1950 to 7 October 19501951: 25 February 1951 to 12 November 19511952: 13 February 1952 to 22 December 19521953: 14 March 1953 to 3 December 19531954: 20 February 1954 to 26 October 19541955: 5 January 1955 to 27 September 19551956: 3 April 1956 to 30 October 19561957: 18 March 1957 to 18 November 19571958: 27 February 1958 to 18 November 19581964: 20 March 1964 to 16 November 19641966: 9 February 1966 to 18 October 19661967: 26 March 1967 to 15 October 19671968: 3 April 1968 to 19 December 19681969: 15 February 1969 to 7 December 19691970: 31 March 1970 to 31 December 19701971: 5 February 1971 to 29 November 19711972: 21 March 1972 to 30 December 19721973: 22 January 1973 to 24 December 19731974: 11 April 1974 to 30 October 19741976: 21 February 1976 to 4 October 19761977: 3 March 1977 to 9 November 19771978: 13 February 1978 to 26 November 19781979: 19 January 1979 to 21 November 19791980: 19 January 1980 to 8 December 19801981: 1 February 1981 to 1 December 19811982: 23 January 1982 to 28 December 19821983: 2 February 1983 to 27 November 19831984: 4 March 1984 to 16 December 19841985: 10 January 1985 to 18 October 19851986: 12 March 1986 to 8 November 19861987: 1 March 1987 to 27 December 19871988: 2 April 1988 to 20 December 19881989: 13 February 1989 to 28 October 19891990: 20 January 1990 to 4 November 19901991: 2 March 1991 to 23 December 199119401946195219581970197719831989JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Hanover 4 S meeting 10 mm (0.39 in).
First to last qualifying date each year at Hanover 4 S
YearFirst dateLast date
19401940-02-031940-12-15
19411941-01-251941-12-23
19421942-01-011942-12-05
19431943-02-021943-12-09
19441944-01-271944-12-04
19451945-02-211945-12-01
19461946-03-061946-11-09
19471947-03-061947-12-04
19481948-01-011948-11-05
19491949-01-041949-12-22
19501950-04-041950-10-07
19511951-02-251951-11-12
19521952-02-131952-12-22
19531953-03-141953-12-03
19541954-02-201954-10-26
19551955-01-051955-09-27
19561956-04-031956-10-30
19571957-03-181957-11-18
19581958-02-271958-11-18
19641964-03-201964-11-16
19661966-02-091966-10-18
19671967-03-261967-10-15
19681968-04-031968-12-19
19691969-02-151969-12-07
19701970-03-311970-12-31
19711971-02-051971-11-29
19721972-03-211972-12-30
19731973-01-221973-12-24
19741974-04-111974-10-30
19761976-02-211976-10-04
19771977-03-031977-11-09
19781978-02-131978-11-26
19791979-01-191979-11-21
19801980-01-191980-12-08
19811981-02-011981-12-01
19821982-01-231982-12-28
19831983-02-021983-11-27
19841984-03-041984-12-16
19851985-01-101985-10-18
19861986-03-121986-11-08
19871987-03-011987-12-27
19881988-04-021988-12-20
19891989-02-131989-10-28
19901990-01-201990-11-04
19911991-03-021991-12-23

Every Fixed Threshold

Fixed thresholds at Hanover 4 S
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain4541194418
25 mm (0.98 in): Days with 25 mm or more rain451319853
50 mm (1.97 in): Days with 50 mm or more rain35719501
100 mm (3.94 in): Days with 100 mm or more rain8319863
10 cm (3.9 in): Days with 10 cm or more snowfall21419421
25 cm (9.8 in): Days with 25 cm or more snowfall1119711

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1940.

Download the Data

  • Data for Hanover 4 S 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).