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

White Rock Threshold Days by Year (CA008206316)

5 fixed thresholds counted per year at White Rock (CA008206316): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for White Rock Thresholds

  • White Rock: days with 10 mm (0.39 in) or more of precipitation in 6 years, most in 1979 with 59.
  • White Rock: days with 25 mm (0.98 in) or more of precipitation in 6 years, most in 1981 with 14.
  • White Rock: days with 10 cm (3.9 in) or more of snowfall in 6 years, most in 1978 with 10.
  • White Rock: days with 50 mm (1.97 in) or more of precipitation in 4 years, most in 1980 with 2.
  • 5 fixed thresholds have at least one qualifying day at White Rock.
6 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at White Rock Days per year at White Rock with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 59 in 1979. 02040601978: 331979: 591980: 381981: 561982: 341983: 37197819791980198119821983
Days per year at White Rock with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 59 in 1979.
Days with 10 mm (0.39 in) or more of precipitation per year at White Rock
YearDaysDecade average
19783346
19795946
19803841.3
19815641.3
19823441.3
19833741.3
First to last qualifying date each year at White Rock For each year, a bar from the first to the last day at White Rock meeting 10 mm (0.39 in). 1978: 9 January 1978 to 27 December 19781979: 3 January 1979 to 28 December 19791980: 12 January 1980 to 30 December 19801981: 2 January 1981 to 27 December 19811982: 1 January 1982 to 19 December 19821983: 11 January 1983 to 24 December 1983197819791980198119821983JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at White Rock meeting 10 mm (0.39 in).
First to last qualifying date each year at White Rock
YearFirst dateLast date
19781978-01-091978-12-27
19791979-01-031979-12-28
19801980-01-121980-12-30
19811981-01-021981-12-27
19821982-01-011982-12-19
19831983-01-111983-12-24

Every Fixed Threshold

Fixed thresholds at White Rock
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain659197937
25 mm (0.98 in): Days with 25 mm or more rain614198113
50 mm (1.97 in): Days with 50 mm or more rain4219801
10 cm (3.9 in): Days with 10 cm or more snowfall61019785
25 cm (9.8 in): Days with 25 cm or more snowfall4319813

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1978.

Download the Data

  • Data for White Rock 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).