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Data as of 2025-12-31
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Built 2026-10-18 (18 October 2026)

Richmond Hills Threshold Days by Year

4 fixed thresholds counted per year at Richmond Hills (ASN00036101): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Richmond Hills Thresholds

  • Richmond Hills: days with 10 mm (0.39 in) or more of precipitation in 25 years, most in 1974 with 28.
  • Richmond Hills: days with 25 mm (0.98 in) or more of precipitation in 25 years, most in 1983 with 11.
  • Richmond Hills: days with 50 mm (1.97 in) or more of precipitation in 17 years, most in 1973 with 3.
  • Richmond Hills: days with 100 mm (3.94 in) or more of precipitation in 6 years, most in 1975 with 1.
  • 4 fixed thresholds have at least one qualifying day at Richmond Hills.
25 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Richmond Hills Days per year at Richmond Hills with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 28 in 1974. 01020301973: 181974: 281975: 151976: 91977: 191978: 211979: 21983: 221984: 251985: 151986: 111987: 141988: 121989: 141990: 151991: 111992: 151993: 161994: 71995: 131996: 161997: 181998: 251999: 152000: 21197319761979198519881991199419972000
Days per year at Richmond Hills with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 28 in 1974.
Days with 10 mm (0.39 in) or more of precipitation per year at Richmond Hills
YearDaysDecade average
19731816
19742816
19751516
1976916
19771916
19782116
1979216
19832216.1
19842516.1
19851516.1
19861116.1
19871416.1
19881216.1
19891416.1
19901515.1
19911115.1
19921515.1
19931615.1
1994715.1
19951315.1
19961615.1
19971815.1
19982515.1
19991515.1
20002121
First to last qualifying date each year at Richmond Hills For each year, a bar from the first to the last day at Richmond Hills meeting 10 mm (0.39 in). 1973: 9 January 1973 to 25 December 19731974: 1 January 1974 to 28 December 19741975: 3 January 1975 to 27 December 19751976: 12 January 1976 to 21 December 19761977: 18 January 1977 to 2 December 19771978: 15 January 1978 to 26 December 19781979: 6 February 1979 to 18 February 19791983: 1 January 1983 to 3 December 19831984: 1 January 1984 to 20 December 19841985: 8 January 1985 to 22 December 19851986: 5 February 1986 to 13 November 19861987: 7 January 1987 to 2 December 19871988: 5 January 1988 to 27 December 19881989: 3 January 1989 to 11 December 19891990: 1 February 1990 to 25 December 19901991: 5 January 1991 to 12 December 19911992: 26 January 1992 to 17 December 19921993: 20 February 1993 to 23 December 19931994: 2 February 1994 to 16 October 19941995: 5 January 1995 to 30 December 19951996: 1 January 1996 to 19 December 19961997: 28 January 1997 to 14 December 19971998: 12 January 1998 to 31 December 19981999: 2 January 1999 to 18 December 19992000: 11 January 2000 to 29 December 20001973197719841988199219962000JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Richmond Hills meeting 10 mm (0.39 in).
First to last qualifying date each year at Richmond Hills
YearFirst dateLast date
19731973-01-091973-12-25
19741974-01-011974-12-28
19751975-01-031975-12-27
19761976-01-121976-12-21
19771977-01-181977-12-02
19781978-01-151978-12-26
19791979-02-061979-02-18
19831983-01-011983-12-03
19841984-01-011984-12-20
19851985-01-081985-12-22
19861986-02-051986-11-13
19871987-01-071987-12-02
19881988-01-051988-12-27
19891989-01-031989-12-11
19901990-02-011990-12-25
19911991-01-051991-12-12
19921992-01-261992-12-17
19931993-02-201993-12-23
19941994-02-021994-10-16
19951995-01-051995-12-30
19961996-01-011996-12-19
19971997-01-281997-12-14
19981998-01-121998-12-31
19991999-01-021999-12-18
20002000-01-112000-12-29

Every Fixed Threshold

Fixed thresholds at Richmond Hills
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain2528197421
25 mm (0.98 in): Days with 25 mm or more rain2511198311
50 mm (1.97 in): Days with 50 mm or more rain17319733
100 mm (3.94 in): Days with 100 mm or more rain6119751

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 Richmond Hills 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).