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Data as of 2025-12-31
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Built 2026-10-17 (17 October 2026)

Riverbank Threshold Days by Year

6 fixed thresholds counted per year at Riverbank (USC00307129): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Riverbank Thresholds

  • Riverbank: days with 10 mm (0.39 in) or more of precipitation in 25 years, most in 1972 with 51.
  • Riverbank: days with 25 mm (0.98 in) or more of precipitation in 25 years, most in 1983 with 13.
  • Riverbank: days with 10 cm (3.9 in) or more of snowfall in 21 years, most in 1971 with 11.
  • Riverbank: days with 50 mm (1.97 in) or more of precipitation in 13 years, most in 1964 with 3.
  • 6 fixed thresholds have at least one qualifying day at Riverbank.
25 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Riverbank Days per year at Riverbank with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 51 in 1972. 02040601956: 241957: 251958: 281959: 421960: 301961: 341962: 261963: 251964: 211965: 291966: 281967: 341968: 381969: 331970: 341971: 391972: 511978: 291979: 391980: 331981: 391982: 301983: 491984: 351985: 27195619591962196519681971197919821985
Days per year at Riverbank with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 51 in 1972.
Days with 10 mm (0.39 in) or more of precipitation per year at Riverbank
YearDaysDecade average
19562429.8
19572529.8
19582829.8
19594229.8
19603029.8
19613429.8
19622629.8
19632529.8
19642129.8
19652929.8
19662829.8
19673429.8
19683829.8
19693329.8
19703438.4
19713938.4
19725138.4
19782938.4
19793938.4
19803335.5
19813935.5
19823035.5
19834935.5
19843535.5
19852735.5
First to last qualifying date each year at Riverbank For each year, a bar from the first to the last day at Riverbank meeting 10 mm (0.39 in). 1956: 3 February 1956 to 23 December 19561957: 23 January 1957 to 27 December 19571958: 1 January 1958 to 6 December 19581959: 2 January 1959 to 29 December 19591960: 3 January 1960 to 21 December 19601961: 2 January 1961 to 20 December 19611962: 7 January 1962 to 23 December 19621963: 13 January 1963 to 10 December 19631964: 10 January 1964 to 28 December 19641965: 24 January 1965 to 26 December 19651966: 24 January 1966 to 29 December 19661967: 28 January 1967 to 29 December 19671968: 29 January 1968 to 29 December 19681969: 25 January 1969 to 28 December 19691970: 3 February 1970 to 24 December 19701971: 14 January 1971 to 31 December 19711972: 3 January 1972 to 22 December 19721978: 9 January 1978 to 26 December 19781979: 2 January 1979 to 25 December 19791980: 12 January 1980 to 8 December 19801981: 2 February 1981 to 28 December 19811982: 4 January 1982 to 16 December 19821983: 11 January 1983 to 29 December 19831984: 25 January 1984 to 22 December 19841985: 1 January 1985 to 14 December 19851956196019641968197219811985JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Riverbank meeting 10 mm (0.39 in).
First to last qualifying date each year at Riverbank
YearFirst dateLast date
19561956-02-031956-12-23
19571957-01-231957-12-27
19581958-01-011958-12-06
19591959-01-021959-12-29
19601960-01-031960-12-21
19611961-01-021961-12-20
19621962-01-071962-12-23
19631963-01-131963-12-10
19641964-01-101964-12-28
19651965-01-241965-12-26
19661966-01-241966-12-29
19671967-01-281967-12-29
19681968-01-291968-12-29
19691969-01-251969-12-28
19701970-02-031970-12-24
19711971-01-141971-12-31
19721972-01-031972-12-22
19781978-01-091978-12-26
19791979-01-021979-12-25
19801980-01-121980-12-08
19811981-02-021981-12-28
19821982-01-041982-12-16
19831983-01-111983-12-29
19841984-01-251984-12-22
19851985-01-011985-12-14

Every Fixed Threshold

Fixed thresholds at Riverbank
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2551197227
25 mm (0.98 in): Days with 25 mm or more rain251319837
50 mm (1.97 in): Days with 50 mm or more rain13319643
10 cm (3.9 in): Days with 10 cm or more snowfall211119716
25 cm (9.8 in): Days with 25 cm or more snowfall11219641
50 cm (19.7 in): Days with 50 cm or more snowfall1119621

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1956.

Download the Data

  • Data for Riverbank 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).