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Built 2026-10-19 (19 October 2026)

Lake Mason Threshold Days by Year (ASN00012210)

4 fixed thresholds counted per year at Lake Mason (ASN00012210): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lake Mason Thresholds

  • Lake Mason: days with 10 mm (0.39 in) or more of precipitation in 28 years, most in 1975 with 17.
  • Lake Mason: days with 25 mm (0.98 in) or more of precipitation in 20 years, most in 2000 with 6.
  • Lake Mason: days with 50 mm (1.97 in) or more of precipitation in 5 years, most in 1975 with 2.
  • Lake Mason: days with 100 mm (3.94 in) or more of precipitation in 1 years, most in 2001 with 1.
  • 4 fixed thresholds have at least one qualifying day at Lake Mason.
28 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Lake Mason Days per year at Lake Mason with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 17 in 1975. 051015201967: 51968: 71969: 21970: 21971: 31972: 41973: 101974: 151975: 171976: 31977: 41978: 51979: 31980: 81981: 11982: 71983: 41984: 111985: 71986: 51987: 61988: 71989: 71990: 51991: 21996: 42000: 132001: 81967197019731976197919821985198819912001
Days per year at Lake Mason with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 17 in 1975.
Days with 10 mm (0.39 in) or more of precipitation per year at Lake Mason
YearDaysDecade average
196754.7
196874.7
196924.7
197026.6
197136.6
197246.6
1973106.6
1974156.6
1975176.6
197636.6
197746.6
197856.6
197936.6
198086.3
198116.3
198276.3
198346.3
1984116.3
198576.3
198656.3
198766.3
198876.3
198976.3
199053.7
199123.7
199643.7
20001310.5
2001810.5
First to last qualifying date each year at Lake Mason For each year, a bar from the first to the last day at Lake Mason meeting 10 mm (0.39 in). 1967: 22 January 1967 to 1 November 19671968: 22 March 1968 to 24 June 19681969: 29 January 1969 to 19 May 19691970: 29 April 1970 to 31 May 19701971: 25 March 1971 to 25 July 19711972: 1 March 1972 to 14 August 19721973: 12 April 1973 to 24 November 19731974: 3 January 1974 to 13 December 19741975: 20 February 1975 to 4 November 19751976: 7 April 1976 to 11 October 19761977: 21 June 1977 to 29 December 19771978: 24 February 1978 to 16 December 19781979: 12 February 1979 to 3 August 19791980: 15 January 1980 to 19 July 19801981: 1 August 1981 to 1 August 19811982: 19 January 1982 to 25 November 19821983: 7 March 1983 to 29 December 19831984: 4 March 1984 to 28 September 19841985: 1 February 1985 to 17 November 19851986: 11 March 1986 to 5 July 19861987: 19 January 1987 to 25 December 19871988: 30 April 1988 to 31 December 19881989: 26 February 1989 to 13 June 19891990: 23 January 1990 to 5 August 19901991: 19 April 1991 to 21 December 19911996: 11 April 1996 to 15 December 19962000: 22 January 2000 to 13 December 20002001: 23 February 2001 to 30 October 20011967197119751979198319871991JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Lake Mason meeting 10 mm (0.39 in).
First to last qualifying date each year at Lake Mason
YearFirst dateLast date
19671967-01-221967-11-01
19681968-03-221968-06-24
19691969-01-291969-05-19
19701970-04-291970-05-31
19711971-03-251971-07-25
19721972-03-011972-08-14
19731973-04-121973-11-24
19741974-01-031974-12-13
19751975-02-201975-11-04
19761976-04-071976-10-11
19771977-06-211977-12-29
19781978-02-241978-12-16
19791979-02-121979-08-03
19801980-01-151980-07-19
19811981-08-011981-08-01
19821982-01-191982-11-25
19831983-03-071983-12-29
19841984-03-041984-09-28
19851985-02-011985-11-17
19861986-03-111986-07-05
19871987-01-191987-12-25
19881988-04-301988-12-31
19891989-02-261989-06-13
19901990-01-231990-08-05
19911991-04-191991-12-21
19961996-04-111996-12-15
20002000-01-222000-12-13
20012001-02-232001-10-30

Every Fixed Threshold

Fixed thresholds at Lake Mason
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain281719758
25 mm (0.98 in): Days with 25 mm or more rain20620001
50 mm (1.97 in): Days with 50 mm or more rain5219751
100 mm (3.94 in): Days with 100 mm or more rain1120011

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1967.

Download the Data

  • Data for Lake Mason 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).