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Built 2026-10-18 (18 October 2026)

Greystonlea Threshold Days by Year

4 fixed thresholds counted per year at Greystonlea (ASN00040670): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Greystonlea Thresholds

  • Greystonlea: days with 10 mm (0.39 in) or more of precipitation in 19 years, most in 1983 with 36.
  • Greystonlea: days with 25 mm (0.98 in) or more of precipitation in 19 years, most in 1983 with 16.
  • Greystonlea: days with 50 mm (1.97 in) or more of precipitation in 17 years, most in 1983 with 4.
  • Greystonlea: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 1989 with 1.
  • 4 fixed thresholds have at least one qualifying day at Greystonlea.
19 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Greystonlea Days per year at Greystonlea with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 36 in 1983. 0102030401978: 331979: 231980: 291981: 301982: 191983: 361984: 261985: 191986: 211987: 191988: 231989: 231990: 211991: 181992: 191993: 171994: 181996: 262005: 211978198019821984198619881990199219942005
Days per year at Greystonlea with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 36 in 1983.
Days with 10 mm (0.39 in) or more of precipitation per year at Greystonlea
YearDaysDecade average
19783328
19792328
19802924.5
19813024.5
19821924.5
19833624.5
19842624.5
19851924.5
19862124.5
19871924.5
19882324.5
19892324.5
19902119.8
19911819.8
19921919.8
19931719.8
19941819.8
19962619.8
20052121
First to last qualifying date each year at Greystonlea For each year, a bar from the first to the last day at Greystonlea meeting 10 mm (0.39 in). 1978: 7 January 1978 to 30 December 19781979: 24 January 1979 to 22 December 19791980: 6 January 1980 to 30 December 19801981: 6 February 1981 to 30 December 19811982: 9 January 1982 to 13 December 19821983: 1 January 1983 to 12 December 19831984: 2 January 1984 to 30 December 19841985: 1 January 1985 to 28 December 19851986: 10 January 1986 to 30 December 19861987: 10 January 1987 to 25 December 19871988: 5 January 1988 to 17 December 19881989: 5 January 1989 to 5 December 19891990: 15 January 1990 to 31 December 19901991: 5 January 1991 to 30 December 19911992: 1 January 1992 to 27 December 19921993: 5 January 1993 to 23 December 19931994: 14 January 1994 to 25 December 19941996: 2 January 1996 to 31 December 19962005: 7 January 2005 to 9 December 20051978198119841987199019932005JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Greystonlea meeting 10 mm (0.39 in).
First to last qualifying date each year at Greystonlea
YearFirst dateLast date
19781978-01-071978-12-30
19791979-01-241979-12-22
19801980-01-061980-12-30
19811981-02-061981-12-30
19821982-01-091982-12-13
19831983-01-011983-12-12
19841984-01-021984-12-30
19851985-01-011985-12-28
19861986-01-101986-12-30
19871987-01-101987-12-25
19881988-01-051988-12-17
19891989-01-051989-12-05
19901990-01-151990-12-31
19911991-01-051991-12-30
19921992-01-011992-12-27
19931993-01-051993-12-23
19941994-01-141994-12-25
19961996-01-021996-12-31
20052005-01-072005-12-09

Every Fixed Threshold

Fixed thresholds at Greystonlea
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1936198321
25 mm (0.98 in): Days with 25 mm or more rain191619837
50 mm (1.97 in): Days with 50 mm or more rain17419831
100 mm (3.94 in): Days with 100 mm or more rain1119891

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1978.

Download the Data

  • Data for Greystonlea 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).