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Data as of 2026-10-17
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Built 2026-10-19 (19 October 2026)

Montrose Threshold Days by Year (USC00395733)

17 fixed thresholds counted per year at Montrose (USC00395733): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Montrose Thresholds

  • Montrose: days with 10 mm (0.39 in) or more of precipitation in 38 years, most in 2009 with 35.
  • Montrose: days with 25 mm (0.98 in) or more of precipitation in 38 years, most in 2009 with 14.
  • Montrose: days with 10 cm (3.9 in) or more of snowfall in 33 years, most in 2013 with 8.
  • Montrose: days with 50 mm (1.97 in) or more of precipitation in 22 years, most in 2006 with 4.
  • 17 fixed thresholds have at least one qualifying day at Montrose.
8 years with a qualifying day
Days at or above 30 C (86 F) per year at Montrose Days per year at Montrose with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 58 in 1970. 02040601964: 511965: 251966: 461967: 291968: 391969: 191970: 581971: 3519641965196619671968196919701971
Days per year at Montrose with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 58 in 1970.
Days at or above 30 C (86 F) per year at Montrose
YearDaysDecade average
19645134.8
19652534.8
19664634.8
19672934.8
19683934.8
19691934.8
19705846.5
19713546.5
First to last qualifying date each year at Montrose For each year, a bar from the first to the last day at Montrose meeting 30 C (86 F). 1964: 16 April 1964 to 9 September 19641965: 29 April 1965 to 16 August 19651966: 22 May 1966 to 31 August 19661967: 22 May 1967 to 26 September 19671968: 30 April 1968 to 23 August 19681969: 26 May 1969 to 29 August 19691970: 7 May 1970 to 5 October 19701971: 15 June 1971 to 13 September 197119641965196619671968196919701971JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Montrose meeting 30 C (86 F).
First to last qualifying date each year at Montrose
YearFirst dateLast date
19641964-04-161964-09-09
19651965-04-291965-08-16
19661966-05-221966-08-31
19671967-05-221967-09-26
19681968-04-301968-08-23
19691969-05-261969-08-29
19701970-05-071970-10-05
19711971-06-151971-09-13

Every Fixed Threshold

Fixed thresholds at Montrose
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days858197035
35 C (95 F): Days81319709
90 F (32.2 C): Days832196418
100 F (37.8 C): Days5319661
0 C (32 F): Ice days (max886196976
0 C (32 F): Frost days (min81771965165
-10 C (14 F): Days with min888196572
-20 C (-4 F): Days with min838196528
-30 C (-22 F): Days with min8719704
20 C (68 F): Tropical nights (min81519665
25 C (77 F): Days with min1119701
10 mm (0.39 in): Days with 10 mm or more rain3835200913
25 mm (0.98 in): Days with 25 mm or more rain381420096
50 mm (1.97 in): Days with 50 mm or more rain22420061
100 mm (3.94 in): Days with 100 mm or more rain5120031
10 cm (3.9 in): Days with 10 cm or more snowfall33820131
25 cm (9.8 in): Days with 25 cm or more snowfall2119881

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1964.

Download the Data

  • Data for Montrose 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 (2026-10-17).