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Built 2026-10-19 (19 October 2026)

Trenton Ont Hydro Threshold Days by Year (CA006158885)

13 fixed thresholds counted per year at Trenton Ont Hydro (CA006158885): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Trenton Ont Hydro Thresholds

  • Trenton Ont Hydro: days with 10 mm (0.39 in) or more of precipitation in 68 years, most in 1977 with 40.
  • Trenton Ont Hydro: days with 25 mm (0.98 in) or more of precipitation in 68 years, most in 1922 with 9.
  • Trenton Ont Hydro: days with 10 cm (3.9 in) or more of snowfall in 68 years, most in 1977 with 13.
  • Trenton Ont Hydro: days with 25 cm (9.8 in) or more of snowfall in 29 years, most in 1918 with 2.
  • 13 fixed thresholds have at least one qualifying day at Trenton Ont Hydro.
4 years with a qualifying day
Days at or above 30 C (86 F) per year at Trenton Ont Hydro Days per year at Trenton Ont Hydro with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 9 in 1975. 0358101974: 51975: 91976: 41977: 71974197519761977
Days per year at Trenton Ont Hydro with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 9 in 1975.
Days at or above 30 C (86 F) per year at Trenton Ont Hydro
YearDaysDecade average
197456.3
197596.3
197646.3
197776.3
First to last qualifying date each year at Trenton Ont Hydro For each year, a bar from the first to the last day at Trenton Ont Hydro meeting 30 C (86 F). 1974: 4 July 1974 to 14 July 19741975: 23 June 1975 to 10 August 19751976: 8 June 1976 to 19 July 19761977: 4 July 1977 to 20 July 19771974197519761977JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Trenton Ont Hydro meeting 30 C (86 F).
First to last qualifying date each year at Trenton Ont Hydro
YearFirst dateLast date
19741974-07-041974-07-14
19751975-06-231975-08-10
19761976-06-081976-07-19
19771977-07-041977-07-20

Every Fixed Threshold

Fixed thresholds at Trenton Ont Hydro
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days4919757
90 F (32.2 C): Days2219751
0 C (32 F): Ice days (max475197775
0 C (32 F): Frost days (min41801976157
-10 C (14 F): Days with min471197662
-20 C (-4 F): Days with min423197618
-30 C (-22 F): Days with min2219762
20 C (68 F): Tropical nights (min2219772
10 mm (0.39 in): Days with 10 mm or more rain6840197733
25 mm (0.98 in): Days with 25 mm or more rain68919226
50 mm (1.97 in): Days with 50 mm or more rain23319803
10 cm (3.9 in): Days with 10 cm or more snowfall681319773
25 cm (9.8 in): Days with 25 cm or more snowfall29219181

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1974.

Download the Data

  • Data for Trenton Ont Hydro 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).