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

Colo Upper 1 Threshold Days by Year

4 fixed thresholds counted per year at Colo Upper 1 (ASN00063181): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Colo Upper 1 Thresholds

  • Colo Upper 1: days with 10 mm (0.39 in) or more of precipitation in 12 years, most in 1934 with 35.
  • Colo Upper 1: days with 25 mm (0.98 in) or more of precipitation in 12 years, most in 1967 with 14.
  • Colo Upper 1: days with 50 mm (1.97 in) or more of precipitation in 11 years, most in 1964 with 6.
  • Colo Upper 1: days with 100 mm (3.94 in) or more of precipitation in 3 years, most in 1934 with 2.
  • 4 fixed thresholds have at least one qualifying day at Colo Upper 1.
12 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Colo Upper 1 Days per year at Colo Upper 1 with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 35 in 1934. 0102030401932: 171933: 331934: 351937: 241940: 81964: 231965: 151966: 201967: 351969: 291970: 221971: 26193219341940196519671970
Days per year at Colo Upper 1 with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 35 in 1934.
Days with 10 mm (0.39 in) or more of precipitation per year at Colo Upper 1
YearDaysDecade average
19321727.3
19333327.3
19343527.3
19372427.3
194088
19642324.4
19651524.4
19662024.4
19673524.4
19692924.4
19702224
19712624
First to last qualifying date each year at Colo Upper 1 For each year, a bar from the first to the last day at Colo Upper 1 meeting 10 mm (0.39 in). 1932: 2 February 1932 to 14 December 19321933: 5 January 1933 to 22 December 19331934: 30 January 1934 to 29 December 19341937: 3 January 1937 to 29 December 19371940: 7 January 1940 to 9 December 19401964: 14 January 1964 to 23 December 19641965: 13 April 1965 to 6 December 19651966: 17 January 1966 to 24 December 19661967: 1 January 1967 to 16 November 19671969: 2 January 1969 to 13 December 19691970: 2 January 1970 to 30 December 19701971: 20 January 1971 to 28 December 1971193219341940196519671970JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Colo Upper 1 meeting 10 mm (0.39 in).
First to last qualifying date each year at Colo Upper 1
YearFirst dateLast date
19321932-02-021932-12-14
19331933-01-051933-12-22
19341934-01-301934-12-29
19371937-01-031937-12-29
19401940-01-071940-12-09
19641964-01-141964-12-23
19651965-04-131965-12-06
19661966-01-171966-12-24
19671967-01-011967-11-16
19691969-01-021969-12-13
19701970-01-021970-12-30
19711971-01-201971-12-28

Every Fixed Threshold

Fixed thresholds at Colo Upper 1
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain1235193426
25 mm (0.98 in): Days with 25 mm or more rain1214196710
50 mm (1.97 in): Days with 50 mm or more rain11619642
100 mm (3.94 in): Days with 100 mm or more rain3219342

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1932.

Download the Data

  • Data for Colo Upper 1 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).