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

Roby Threshold Days by Year (USC00237214)

6 fixed thresholds counted per year at Roby (USC00237214): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Roby Thresholds

  • Roby: days with 10 mm (0.39 in) or more of precipitation in 36 years, most in 1951 with 51.
  • Roby: days with 25 mm (0.98 in) or more of precipitation in 36 years, most in 1945 with 20.
  • Roby: days with 50 mm (1.97 in) or more of precipitation in 33 years, most in 1951 with 8.
  • Roby: days with 10 cm (3.9 in) or more of snowfall in 19 years, most in 1969 with 4.
  • 6 fixed thresholds have at least one qualifying day at Roby.
36 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Roby Days per year at Roby with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 51 in 1951. 02040601942: 371943: 341944: 271945: 411946: 421947: 311948: 331949: 431950: 361951: 511952: 251953: 201954: 281955: 291956: 311957: 391958: 351959: 391960: 241961: 421962: 311963: 231964: 271965: 411966: 331967: 351968: 361969: 301970: 381971: 311972: 341973: 471974: 401975: 381976: 151977: 43194219461950195419581962196619701974
Days per year at Roby with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 51 in 1951.
Days with 10 mm (0.39 in) or more of precipitation per year at Roby
YearDaysDecade average
19423736
19433436
19442736
19454136
19464236
19473136
19483336
19494336
19503633.3
19515133.3
19522533.3
19532033.3
19542833.3
19552933.3
19563133.3
19573933.3
19583533.3
19593933.3
19602432.2
19614232.2
19623132.2
19632332.2
19642732.2
19654132.2
19663332.2
19673532.2
19683632.2
19693032.2
19703835.8
19713135.8
19723435.8
19734735.8
19744035.8
19753835.8
19761535.8
19774335.8
First to last qualifying date each year at Roby For each year, a bar from the first to the last day at Roby meeting 10 mm (0.39 in). 1942: 30 January 1942 to 28 December 19421943: 3 February 1943 to 28 December 19431944: 14 February 1944 to 7 December 19441945: 13 February 1945 to 12 November 19451946: 5 January 1946 to 12 December 19461947: 30 January 1947 to 31 December 19471948: 1 January 1948 to 28 December 19481949: 18 January 1949 to 26 December 19491950: 4 January 1950 to 20 November 19501951: 3 January 1951 to 9 December 19511952: 4 January 1952 to 20 December 19521953: 17 January 1953 to 20 November 19531954: 20 January 1954 to 29 December 19541955: 2 February 1955 to 16 November 19551956: 2 February 1956 to 20 December 19561957: 22 January 1957 to 17 December 19571958: 21 January 1958 to 28 November 19581959: 15 January 1959 to 28 December 19591960: 28 February 1960 to 11 December 19601961: 3 February 1961 to 17 December 19611962: 5 January 1962 to 29 December 19621963: 5 March 1963 to 11 December 19631964: 24 January 1964 to 28 November 19641965: 1 January 1965 to 24 December 19651966: 1 January 1966 to 23 December 19661967: 26 January 1967 to 22 December 19671968: 28 January 1968 to 28 December 19681969: 16 January 1969 to 25 December 19691970: 2 March 1970 to 21 December 19701971: 4 January 1971 to 30 December 19711972: 28 January 1972 to 12 December 19721973: 4 January 1973 to 20 December 19731974: 10 January 1974 to 7 December 19741975: 1 January 1975 to 29 December 19751976: 25 January 1976 to 30 October 19761977: 10 January 1977 to 14 December 197719421947195219571962196719721977JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Roby meeting 10 mm (0.39 in).
First to last qualifying date each year at Roby
YearFirst dateLast date
19421942-01-301942-12-28
19431943-02-031943-12-28
19441944-02-141944-12-07
19451945-02-131945-11-12
19461946-01-051946-12-12
19471947-01-301947-12-31
19481948-01-011948-12-28
19491949-01-181949-12-26
19501950-01-041950-11-20
19511951-01-031951-12-09
19521952-01-041952-12-20
19531953-01-171953-11-20
19541954-01-201954-12-29
19551955-02-021955-11-16
19561956-02-021956-12-20
19571957-01-221957-12-17
19581958-01-211958-11-28
19591959-01-151959-12-28
19601960-02-281960-12-11
19611961-02-031961-12-17
19621962-01-051962-12-29
19631963-03-051963-12-11
19641964-01-241964-11-28
19651965-01-011965-12-24
19661966-01-011966-12-23
19671967-01-261967-12-22
19681968-01-281968-12-28
19691969-01-161969-12-25
19701970-03-021970-12-21
19711971-01-041971-12-30
19721972-01-281972-12-12
19731973-01-041973-12-20
19741974-01-101974-12-07
19751975-01-011975-12-29
19761976-01-251976-10-30
19771977-01-101977-12-14

Every Fixed Threshold

Fixed thresholds at Roby
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3651195143
25 mm (0.98 in): Days with 25 mm or more rain3620194516
50 mm (1.97 in): Days with 50 mm or more rain33819512
100 mm (3.94 in): Days with 100 mm or more rain6119421
10 cm (3.9 in): Days with 10 cm or more snowfall19419693
25 cm (9.8 in): Days with 25 cm or more snowfall1119511

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1942.

Download the Data

  • Data for Roby 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).