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Built 2026-10-17 (17 October 2026)

Alameda Downs Threshold Days by Year

5 fixed thresholds counted per year at Alameda Downs (ASN00034060): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alameda Downs Thresholds

  • Alameda Downs: days with 10 mm (0.39 in) or more of precipitation in 28 years, most in 1979 with 29.
  • Alameda Downs: days with 25 mm (0.98 in) or more of precipitation in 28 years, most in 1983 with 15.
  • Alameda Downs: days with 50 mm (1.97 in) or more of precipitation in 23 years, most in 1990 with 7.
  • Alameda Downs: days with 100 mm (3.94 in) or more of precipitation in 9 years, most in 1979 with 1.
  • 5 fixed thresholds have at least one qualifying day at Alameda Downs.
28 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Alameda Downs Days per year at Alameda Downs with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 29 in 1979. 01020301973: 181974: 131975: 231976: 221978: 201979: 291980: 121981: 241982: 131983: 251984: 181985: 171986: 151987: 91988: 211989: 281990: 221991: 251992: 121993: 141994: 71995: 161996: 131997: 131998: 261999: 192000: 222003: 171973197619801983198619891992199519982003
Days per year at Alameda Downs with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 29 in 1979.
Days with 10 mm (0.39 in) or more of precipitation per year at Alameda Downs
YearDaysDecade average
19731820.8
19741320.8
19752320.8
19762220.8
19782020.8
19792920.8
19801218.2
19812418.2
19821318.2
19832518.2
19841818.2
19851718.2
19861518.2
1987918.2
19882118.2
19892818.2
19902216.7
19912516.7
19921216.7
19931416.7
1994716.7
19951616.7
19961316.7
19971316.7
19982616.7
19991916.7
20002219.5
20031719.5
First to last qualifying date each year at Alameda Downs For each year, a bar from the first to the last day at Alameda Downs meeting 10 mm (0.39 in). 1973: 14 January 1973 to 19 December 19731974: 22 January 1974 to 29 December 19741975: 4 January 1975 to 30 December 19751976: 11 January 1976 to 22 December 19761978: 6 January 1978 to 31 December 19781979: 26 January 1979 to 29 December 19791980: 6 January 1980 to 31 December 19801981: 1 January 1981 to 4 December 19811982: 16 January 1982 to 22 December 19821983: 2 January 1983 to 4 December 19831984: 4 January 1984 to 11 December 19841985: 25 February 1985 to 11 December 19851986: 2 January 1986 to 9 December 19861987: 3 March 1987 to 2 December 19871988: 1 January 1988 to 21 December 19881989: 3 January 1989 to 15 December 19891990: 21 January 1990 to 31 December 19901991: 2 January 1991 to 23 December 19911992: 18 January 1992 to 19 December 19921993: 7 January 1993 to 11 December 19931994: 14 February 1994 to 23 November 19941995: 20 January 1995 to 24 December 19951996: 4 January 1996 to 31 December 19961997: 1 January 1997 to 29 December 19971998: 30 January 1998 to 30 December 19981999: 4 January 1999 to 19 December 19992000: 2 January 2000 to 29 December 20002003: 25 January 2003 to 29 December 20031973197819821986199019941998JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Alameda Downs meeting 10 mm (0.39 in).
First to last qualifying date each year at Alameda Downs
YearFirst dateLast date
19731973-01-141973-12-19
19741974-01-221974-12-29
19751975-01-041975-12-30
19761976-01-111976-12-22
19781978-01-061978-12-31
19791979-01-261979-12-29
19801980-01-061980-12-31
19811981-01-011981-12-04
19821982-01-161982-12-22
19831983-01-021983-12-04
19841984-01-041984-12-11
19851985-02-251985-12-11
19861986-01-021986-12-09
19871987-03-031987-12-02
19881988-01-011988-12-21
19891989-01-031989-12-15
19901990-01-211990-12-31
19911991-01-021991-12-23
19921992-01-181992-12-19
19931993-01-071993-12-11
19941994-02-141994-11-23
19951995-01-201995-12-24
19961996-01-041996-12-31
19971997-01-011997-12-29
19981998-01-301998-12-30
19991999-01-041999-12-19
20002000-01-022000-12-29
20032003-01-252003-12-29

Every Fixed Threshold

Fixed thresholds at Alameda Downs
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2829197917
25 mm (0.98 in): Days with 25 mm or more rain2815198310
50 mm (1.97 in): Days with 50 mm or more rain23719901
100 mm (3.94 in): Days with 100 mm or more rain9119791
200 mm (7.87 in): Days with 200 mm or more rain1119881

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1973.

Download the Data

  • Data for Alameda Downs 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

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