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

Roper Valley Threshold Days by Year (ASN00014617)

5 fixed thresholds counted per year at Roper Valley (ASN00014617): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Roper Valley Thresholds

  • Roper Valley: days with 10 mm (0.39 in) or more of precipitation in 17 years, most in 1977 with 39.
  • Roper Valley: days with 25 mm (0.98 in) or more of precipitation in 17 years, most in 1987 with 23.
  • Roper Valley: days with 50 mm (1.97 in) or more of precipitation in 16 years, most in 1984 with 11.
  • Roper Valley: days with 100 mm (3.94 in) or more of precipitation in 8 years, most in 1963 with 2.
  • 5 fixed thresholds have at least one qualifying day at Roper Valley.
17 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Roper Valley Days per year at Roper Valley with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 39 in 1977. 0102030401963: 251964: 241965: 261966: 211967: 301968: 281969: 311970: 131971: 251972: 151975: 311977: 391983: 131984: 311985: 251987: 301995: 23196319651967196919711975198319851995
Days per year at Roper Valley with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 39 in 1977.
Days with 10 mm (0.39 in) or more of precipitation per year at Roper Valley
YearDaysDecade average
19632526.4
19642426.4
19652626.4
19662126.4
19673026.4
19682826.4
19693126.4
19701324.6
19712524.6
19721524.6
19753124.6
19773924.6
19831324.8
19843124.8
19852524.8
19873024.8
19952323
First to last qualifying date each year at Roper Valley For each year, a bar from the first to the last day at Roper Valley meeting 10 mm (0.39 in). 1963: 7 January 1963 to 22 December 19631964: 3 January 1964 to 24 December 19641965: 1 January 1965 to 29 December 19651966: 15 January 1966 to 7 December 19661967: 1 January 1967 to 30 December 19671968: 19 January 1968 to 26 December 19681969: 2 January 1969 to 22 December 19691970: 28 January 1970 to 24 December 19701971: 10 January 1971 to 28 December 19711972: 8 January 1972 to 27 November 19721975: 2 January 1975 to 24 December 19751977: 7 January 1977 to 23 December 19771983: 2 January 1983 to 31 December 19831984: 5 January 1984 to 20 December 19841985: 26 January 1985 to 6 December 19851987: 2 January 1987 to 29 December 19871995: 6 January 1995 to 8 December 1995196319661969197219831987JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Roper Valley meeting 10 mm (0.39 in).
First to last qualifying date each year at Roper Valley
YearFirst dateLast date
19631963-01-071963-12-22
19641964-01-031964-12-24
19651965-01-011965-12-29
19661966-01-151966-12-07
19671967-01-011967-12-30
19681968-01-191968-12-26
19691969-01-021969-12-22
19701970-01-281970-12-24
19711971-01-101971-12-28
19721972-01-081972-11-27
19751975-01-021975-12-24
19771977-01-071977-12-23
19831983-01-021983-12-31
19841984-01-051984-12-20
19851985-01-261985-12-06
19871987-01-021987-12-29
19951995-01-061995-12-08

Every Fixed Threshold

Fixed thresholds at Roper Valley
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1739197723
25 mm (0.98 in): Days with 25 mm or more rain172319876
50 mm (1.97 in): Days with 50 mm or more rain161119849
100 mm (3.94 in): Days with 100 mm or more rain8219631
200 mm (7.87 in): Days with 200 mm or more rain1119851

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1963.

Download the Data

  • Data for Roper Valley 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).