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

Alder Threshold Days by Year

4 fixed thresholds counted per year at Alder (USC00240100): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Alder Thresholds

  • Alder: days with 10 mm (0.39 in) or more of precipitation in 11 years, most in 1975 with 11.
  • Alder: days with 25 mm (0.98 in) or more of precipitation in 6 years, most in 1966 with 1.
  • Alder: days with 10 cm (3.9 in) or more of snowfall in 2 years, most in 1960 with 2.
  • Alder: days with 25 cm (9.8 in) or more of snowfall in 1 years, most in 1961 with 1.
  • 4 fixed thresholds have at least one qualifying day at Alder.
11 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Alder Days per year at Alder with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 11 in 1975. 0510151960: 11961: 81966: 31967: 71968: 61969: 101971: 71972: 31973: 71975: 111976: 8196019661968197119731976
Days per year at Alder with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 11 in 1975.
Days with 10 mm (0.39 in) or more of precipitation per year at Alder
YearDaysDecade average
196015.8
196185.8
196635.8
196775.8
196865.8
1969105.8
197177.2
197237.2
197377.2
1975117.2
197687.2
First to last qualifying date each year at Alder For each year, a bar from the first to the last day at Alder meeting 10 mm (0.39 in). 1960: 23 August 1960 to 23 August 19601961: 15 May 1961 to 28 October 19611966: 16 February 1966 to 15 September 19661967: 29 March 1967 to 1 October 19671968: 15 May 1968 to 25 November 19681969: 7 April 1969 to 8 November 19691971: 31 May 1971 to 7 September 19711972: 6 July 1972 to 15 October 19721973: 14 April 1973 to 1 November 19731975: 26 April 1975 to 14 October 19751976: 23 April 1976 to 19 September 1976196019661968197119731976JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Alder meeting 10 mm (0.39 in).
First to last qualifying date each year at Alder
YearFirst dateLast date
19601960-08-231960-08-23
19611961-05-151961-10-28
19661966-02-161966-09-15
19671967-03-291967-10-01
19681968-05-151968-11-25
19691969-04-071969-11-08
19711971-05-311971-09-07
19721972-07-061972-10-15
19731973-04-141973-11-01
19751975-04-261975-10-14
19761976-04-231976-09-19

Every Fixed Threshold

Fixed thresholds at Alder
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain111119758
25 mm (0.98 in): Days with 25 mm or more rain6119661
10 cm (3.9 in): Days with 10 cm or more snowfall2219602
25 cm (9.8 in): Days with 25 cm or more snowfall1119611

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1960.

Download the Data

  • Data for Alder 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).