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

Roanoke Threshold Days by Year (USC00467598)

6 fixed thresholds counted per year at Roanoke (USC00467598): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Roanoke Thresholds

  • Roanoke: days with 10 mm (0.39 in) or more of precipitation in 34 years, most in 1950 with 55.
  • Roanoke: days with 25 mm (0.98 in) or more of precipitation in 34 years, most in 1945 with 15.
  • Roanoke: days with 50 mm (1.97 in) or more of precipitation in 16 years, most in 1948 with 5.
  • Roanoke: days with 10 cm (3.9 in) or more of snowfall in 11 years, most in 1926 with 4.
  • 6 fixed thresholds have at least one qualifying day at Roanoke.
34 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Roanoke Days per year at Roanoke with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 55 in 1950. 02040601924: 491925: 441926: 501927: 541928: 411929: 371930: 191931: 401932: 381933: 461934: 331935: 441936: 451937: 491938: 391939: 341941: 351942: 511943: 431945: 431946: 351947: 341948: 481949: 471950: 551951: 541952: 371953: 291954: 401955: 361956: 541957: 371958: 401959: 37192419281932193619411946195019541958
Days per year at Roanoke with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 55 in 1950.
Days with 10 mm (0.39 in) or more of precipitation per year at Roanoke
YearDaysDecade average
19244945.8
19254445.8
19265045.8
19275445.8
19284145.8
19293745.8
19301938.7
19314038.7
19323838.7
19334638.7
19343338.7
19354438.7
19364538.7
19374938.7
19383938.7
19393438.7
19413542
19425142
19434342
19454342
19463542
19473442
19484842
19494742
19505541.9
19515441.9
19523741.9
19532941.9
19544041.9
19553641.9
19565441.9
19573741.9
19584041.9
19593741.9
First to last qualifying date each year at Roanoke For each year, a bar from the first to the last day at Roanoke meeting 10 mm (0.39 in). 1924: 3 January 1924 to 24 December 19241925: 16 January 1925 to 22 December 19251926: 18 January 1926 to 26 December 19261927: 20 January 1927 to 13 December 19271928: 19 January 1928 to 14 December 19281929: 10 January 1929 to 28 December 19291930: 3 January 1930 to 26 December 19301931: 5 January 1931 to 22 December 19311932: 1 January 1932 to 31 December 19321933: 9 January 1933 to 26 December 19331934: 5 January 1934 to 26 December 19341935: 8 January 1935 to 13 December 19351936: 2 January 1936 to 30 December 19361937: 2 January 1937 to 18 December 19371938: 25 January 1938 to 24 November 19381939: 13 January 1939 to 20 December 19391941: 16 January 1941 to 13 December 19411942: 1 January 1942 to 30 December 19421943: 17 January 1943 to 29 December 19431945: 1 January 1945 to 6 December 19451946: 7 January 1946 to 29 December 19461947: 1 January 1947 to 9 December 19471948: 1 January 1948 to 19 December 19481949: 5 January 1949 to 26 December 19491950: 3 January 1950 to 15 December 19501951: 11 January 1951 to 30 December 19511952: 2 January 1952 to 11 December 19521953: 3 January 1953 to 14 December 19531954: 21 February 1954 to 30 December 19541955: 11 January 1955 to 4 December 19551956: 29 January 1956 to 24 December 19561957: 23 January 1957 to 26 December 19571958: 14 January 1958 to 28 November 19581959: 15 January 1959 to 12 December 19591924192919341939194619511956JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Roanoke meeting 10 mm (0.39 in).
First to last qualifying date each year at Roanoke
YearFirst dateLast date
19241924-01-031924-12-24
19251925-01-161925-12-22
19261926-01-181926-12-26
19271927-01-201927-12-13
19281928-01-191928-12-14
19291929-01-101929-12-28
19301930-01-031930-12-26
19311931-01-051931-12-22
19321932-01-011932-12-31
19331933-01-091933-12-26
19341934-01-051934-12-26
19351935-01-081935-12-13
19361936-01-021936-12-30
19371937-01-021937-12-18
19381938-01-251938-11-24
19391939-01-131939-12-20
19411941-01-161941-12-13
19421942-01-011942-12-30
19431943-01-171943-12-29
19451945-01-011945-12-06
19461946-01-071946-12-29
19471947-01-011947-12-09
19481948-01-011948-12-19
19491949-01-051949-12-26
19501950-01-031950-12-15
19511951-01-111951-12-30
19521952-01-021952-12-11
19531953-01-031953-12-14
19541954-02-211954-12-30
19551955-01-111955-12-04
19561956-01-291956-12-24
19571957-01-231957-12-26
19581958-01-141958-11-28
19591959-01-151959-12-12

Every Fixed Threshold

Fixed thresholds at Roanoke
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3455195037
25 mm (0.98 in): Days with 25 mm or more rain3415194510
50 mm (1.97 in): Days with 50 mm or more rain16519481
100 mm (3.94 in): Days with 100 mm or more rain1119481
10 cm (3.9 in): Days with 10 cm or more snowfall11419263
25 cm (9.8 in): Days with 25 cm or more snowfall1119291

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1924.

Download the Data

  • Data for Roanoke 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).