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

Copper Cliff Threshold Days by Year (CA006061870)

14 fixed thresholds counted per year at Copper Cliff (CA006061870): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Copper Cliff Thresholds

  • Copper Cliff: days with a maximum temperature at or above 30 C (86 F) in 6 years, most in 1911 with 17.
  • Copper Cliff: days with a maximum temperature at or below 0 C (32 F) in 6 years, most in 1912 with 101.
  • Copper Cliff: nights with a minimum temperature at or below 0 C (32 F) in 6 years, most in 1909 with 188.
  • Copper Cliff: nights with a minimum temperature at or below -10 C (14 F) in 6 years, most in 1911 with 105.
  • 14 fixed thresholds have at least one qualifying day at Copper Cliff.
6 years with a qualifying day
Days at or above 30 C (86 F) per year at Copper Cliff Days per year at Copper Cliff with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 17 in 1911. 051015201909: 111910: 101911: 171912: 111913: 101915: 4190919101911191219131915
Days per year at Copper Cliff with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 17 in 1911.
Days at or above 30 C (86 F) per year at Copper Cliff
YearDaysDecade average
19091111
19101010.4
19111710.4
19121110.4
19131010.4
1915410.4
First to last qualifying date each year at Copper Cliff For each year, a bar from the first to the last day at Copper Cliff meeting 30 C (86 F). 1909: 21 June 1909 to 25 August 19091910: 15 June 1910 to 9 July 19101911: 19 May 1911 to 7 August 19111912: 24 June 1912 to 15 July 19121913: 13 June 1913 to 17 August 19131915: 30 June 1915 to 30 July 1915190919101911191219131915JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Copper Cliff meeting 30 C (86 F).
First to last qualifying date each year at Copper Cliff
YearFirst dateLast date
19091909-06-211909-08-25
19101910-06-151910-07-09
19111911-05-191911-08-07
19121912-06-241912-07-15
19131913-06-131913-08-17
19151915-06-301915-07-30

Every Fixed Threshold

Fixed thresholds at Copper Cliff
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days61719114
35 C (95 F): Days1419114
90 F (32.2 C): Days5719113
0 C (32 F): Ice days (max6101191288
0 C (32 F): Frost days (min61881909160
-10 C (14 F): Days with min6105191176
-20 C (-4 F): Days with min652191216
-30 C (-22 F): Days with min51219125
20 C (68 F): Tropical nights (min5319111
25 C (77 F): Days with min1119121
10 mm (0.39 in): Days with 10 mm or more rain626191023
25 mm (0.98 in): Days with 25 mm or more rain6619102
10 cm (3.9 in): Days with 10 cm or more snowfall6619095
25 cm (9.8 in): Days with 25 cm or more snowfall2119091

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1909.

Download the Data

  • Data for Copper Cliff 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).