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

Clearwater Threshold Days by Year

13 fixed thresholds counted per year at Clearwater (USC00502019): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Clearwater Thresholds

  • Clearwater: nights with a minimum temperature at or below 0 C (32 F) in 24 years, most in 1972 with 274.
  • Clearwater: nights with a minimum temperature at or below -10 C (14 F) in 24 years, most in 1972 with 203.
  • Clearwater: nights with a minimum temperature at or below -20 C (-4 F) in 24 years, most in 1972 with 140.
  • Clearwater: nights with a minimum temperature at or below -30 C (-22 F) in 24 years, most in 1972 with 81.
  • 13 fixed thresholds have at least one qualifying day at Clearwater.
14 years with a qualifying day
Days at or above 30 C (86 F) per year at Clearwater Days per year at Clearwater with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 6 in 1969. 02461967: 31968: 41969: 61970: 11971: 11972: 41975: 21977: 61980: 21982: 21986: 21987: 11990: 41991: 31967196919711975198019861990
Days per year at Clearwater with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 6 in 1969.
Days at or above 30 C (86 F) per year at Clearwater
YearDaysDecade average
196734.3
196844.3
196964.3
197012.8
197112.8
197242.8
197522.8
197762.8
198021.8
198221.8
198621.8
198711.8
199043.5
199133.5
First to last qualifying date each year at Clearwater For each year, a bar from the first to the last day at Clearwater meeting 30 C (86 F). 1967: 17 June 1967 to 14 July 19671968: 20 July 1968 to 25 July 19681969: 12 June 1969 to 22 June 19691970: 27 July 1970 to 27 July 19701971: 23 June 1971 to 23 June 19711972: 14 June 1972 to 10 July 19721975: 10 July 1975 to 11 July 19751977: 29 July 1977 to 22 August 19771980: 11 August 1980 to 12 August 19801982: 7 July 1982 to 8 July 19821986: 5 July 1986 to 6 July 19861987: 21 June 1987 to 21 June 19871990: 23 July 1990 to 14 August 19901991: 20 June 1991 to 22 June 19911967196919711975198019861990JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Clearwater meeting 30 C (86 F).
First to last qualifying date each year at Clearwater
YearFirst dateLast date
19671967-06-171967-07-14
19681968-07-201968-07-25
19691969-06-121969-06-22
19701970-07-271970-07-27
19711971-06-231971-06-23
19721972-06-141972-07-10
19751975-07-101975-07-11
19771977-07-291977-08-22
19801980-08-111980-08-12
19821982-07-071982-07-08
19861986-07-051986-07-06
19871987-06-211987-06-21
19901990-07-231990-08-14
19911991-06-201991-06-22

Every Fixed Threshold

Fixed thresholds at Clearwater
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days14619693
90 F (32.2 C): Days7219671
0 C (32 F): Ice days (max221781972155
0 C (32 F): Frost days (min242741972240
-10 C (14 F): Days with min242031972157
-20 C (-4 F): Days with min24140197297
-30 C (-22 F): Days with min2481197237
-40 C (-40 F): Days with min234419716
10 mm (0.39 in): Days with 10 mm or more rain2317197510
25 mm (0.98 in): Days with 25 mm or more rain14519751
50 mm (1.97 in): Days with 50 mm or more rain1119651
10 cm (3.9 in): Days with 10 cm or more snowfall211019704
25 cm (9.8 in): Days with 25 cm or more snowfall2119651

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 Clearwater 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).