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

Bolthan Threshold Days by Year (IN002160900)

4 fixed thresholds counted per year at Bolthan (IN002160900): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bolthan Thresholds

  • Bolthan: days with 10 mm (0.39 in) or more of precipitation in 24 years, most in 1959 with 36.
  • Bolthan: days with 25 mm (0.98 in) or more of precipitation in 24 years, most in 1959 with 21.
  • Bolthan: days with 50 mm (1.97 in) or more of precipitation in 23 years, most in 1964 with 7.
  • Bolthan: days with 100 mm (3.94 in) or more of precipitation in 10 years, most in 1956 with 3.
  • 4 fixed thresholds have at least one qualifying day at Bolthan.
24 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Bolthan Days per year at Bolthan with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 36 in 1959. 0102030401939: 201940: 131941: 111942: 251943: 231944: 221945: 181946: 191947: 201948: 251949: 211950: 191951: 211952: 131953: 191954: 191955: 241956: 311957: 161958: 311959: 361960: 271961: 231964: 2419391942194519481951195419571960
Days per year at Bolthan with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 36 in 1959.
Days with 10 mm (0.39 in) or more of precipitation per year at Bolthan
YearDaysDecade average
19392020
19401319.7
19411119.7
19422519.7
19432319.7
19442219.7
19451819.7
19461919.7
19472019.7
19482519.7
19492119.7
19501922.9
19512122.9
19521322.9
19531922.9
19541922.9
19552422.9
19563122.9
19571622.9
19583122.9
19593622.9
19602724.7
19612324.7
19642424.7
First to last qualifying date each year at Bolthan For each year, a bar from the first to the last day at Bolthan meeting 10 mm (0.39 in). 1939: 17 April 1939 to 3 November 19391940: 22 May 1940 to 29 November 19401941: 26 February 1941 to 21 September 19411942: 14 June 1942 to 26 December 19421943: 27 May 1943 to 18 October 19431944: 9 June 1944 to 29 October 19441945: 10 June 1945 to 17 November 19451946: 12 June 1946 to 14 December 19461947: 1 January 1947 to 22 December 19471948: 21 January 1948 to 21 November 19481949: 4 June 1949 to 28 September 19491950: 4 July 1950 to 14 November 19501951: 31 May 1951 to 14 October 19511952: 25 June 1952 to 20 September 19521953: 13 June 1953 to 18 October 19531954: 17 March 1954 to 17 December 19541955: 11 January 1955 to 21 October 19551956: 11 January 1956 to 22 November 19561957: 19 March 1957 to 13 November 19571958: 30 April 1958 to 25 November 19581959: 3 May 1959 to 12 November 19591960: 11 June 1960 to 12 October 19601961: 11 May 1961 to 8 November 19611964: 11 April 1964 to 31 October 196419391942194519481951195419571960JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Bolthan meeting 10 mm (0.39 in).
First to last qualifying date each year at Bolthan
YearFirst dateLast date
19391939-04-171939-11-03
19401940-05-221940-11-29
19411941-02-261941-09-21
19421942-06-141942-12-26
19431943-05-271943-10-18
19441944-06-091944-10-29
19451945-06-101945-11-17
19461946-06-121946-12-14
19471947-01-011947-12-22
19481948-01-211948-11-21
19491949-06-041949-09-28
19501950-07-041950-11-14
19511951-05-311951-10-14
19521952-06-251952-09-20
19531953-06-131953-10-18
19541954-03-171954-12-17
19551955-01-111955-10-21
19561956-01-111956-11-22
19571957-03-191957-11-13
19581958-04-301958-11-25
19591959-05-031959-11-12
19601960-06-111960-10-12
19611961-05-111961-11-08
19641964-04-111964-10-31

Every Fixed Threshold

Fixed thresholds at Bolthan
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2436195924
25 mm (0.98 in): Days with 25 mm or more rain2421195910
50 mm (1.97 in): Days with 50 mm or more rain23719647
100 mm (3.94 in): Days with 100 mm or more rain10319563

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1939.

Download the Data

  • Data for Bolthan 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).