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Data as of 2025-12-31
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Built 2026-10-19 (19 October 2026)

Optimo Threshold Days by Year (USC00296412)

7 fixed thresholds counted per year at Optimo (USC00296412): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Optimo Thresholds

  • Optimo: days with 10 mm (0.39 in) or more of precipitation in 16 years, most in 1957 with 22.
  • Optimo: days with 25 mm (0.98 in) or more of precipitation in 15 years, most in 1948 with 8.
  • Optimo: days with 10 cm (3.9 in) or more of snowfall in 13 years, most in 1958 with 10.
  • Optimo: days with 50 mm (1.97 in) or more of precipitation in 7 years, most in 1942 with 3.
  • 7 fixed thresholds have at least one qualifying day at Optimo.
16 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Optimo Days per year at Optimo with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 22 in 1957. 01020301942: 151943: 61944: 171945: 81946: 181948: 171949: 121950: 111951: 91952: 111953: 111954: 51955: 81956: 51957: 221958: 2119421944194619491951195319551957
Days per year at Optimo with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 22 in 1957.
Days with 10 mm (0.39 in) or more of precipitation per year at Optimo
YearDaysDecade average
19421513.3
1943613.3
19441713.3
1945813.3
19461813.3
19481713.3
19491213.3
19501111.4
1951911.4
19521111.4
19531111.4
1954511.4
1955811.4
1956511.4
19572211.4
19582111.4
First to last qualifying date each year at Optimo For each year, a bar from the first to the last day at Optimo meeting 10 mm (0.39 in). 1942: 12 April 1942 to 17 October 19421943: 30 June 1943 to 26 November 19431944: 27 January 1944 to 20 November 19441945: 21 January 1945 to 1 September 19451946: 5 March 1946 to 6 November 19461948: 5 February 1948 to 1 November 19481949: 20 April 1949 to 16 September 19491950: 4 June 1950 to 25 September 19501951: 18 May 1951 to 9 September 19511952: 12 February 1952 to 26 August 19521953: 28 May 1953 to 6 November 19531954: 11 May 1954 to 27 December 19541955: 10 May 1955 to 25 September 19551956: 24 May 1956 to 21 August 19561957: 4 January 1957 to 21 November 19571958: 4 January 1958 to 17 November 195819421944194619491951195319551957JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Optimo meeting 10 mm (0.39 in).
First to last qualifying date each year at Optimo
YearFirst dateLast date
19421942-04-121942-10-17
19431943-06-301943-11-26
19441944-01-271944-11-20
19451945-01-211945-09-01
19461946-03-051946-11-06
19481948-02-051948-11-01
19491949-04-201949-09-16
19501950-06-041950-09-25
19511951-05-181951-09-09
19521952-02-121952-08-26
19531953-05-281953-11-06
19541954-05-111954-12-27
19551955-05-101955-09-25
19561956-05-241956-08-21
19571957-01-041957-11-21
19581958-01-041958-11-17

Every Fixed Threshold

Fixed thresholds at Optimo
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1622195721
25 mm (0.98 in): Days with 25 mm or more rain15819484
50 mm (1.97 in): Days with 50 mm or more rain7319421
100 mm (3.94 in): Days with 100 mm or more rain2119421
10 cm (3.9 in): Days with 10 cm or more snowfall1310195810
25 cm (9.8 in): Days with 25 cm or more snowfall6319583
50 cm (19.7 in): Days with 50 cm or more snowfall3119461

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1942.

Download the Data

  • Data for Optimo 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).