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

Grindstone Island Threshold Days by Year (CA007052960)

12 fixed thresholds counted per year at Grindstone Island (CA007052960): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Grindstone Island Thresholds

  • Grindstone Island: days with a maximum temperature at or below 0 C (32 F) in 54 years, most in 1965 with 121.
  • Grindstone Island: nights with a minimum temperature at or below 0 C (32 F) in 54 years, most in 1972 with 197.
  • Grindstone Island: nights with a minimum temperature at or below -10 C (14 F) in 54 years, most in 1934 with 82.
  • Grindstone Island: days with 10 mm (0.39 in) or more of precipitation in 54 years, most in 1892 with 49.
  • 12 fixed thresholds have at least one qualifying day at Grindstone Island.
4 years with a qualifying day
Days at or above 30 C (86 F) per year at Grindstone Island Days per year at Grindstone Island with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 1 in 1935. 001111935: 11944: 11949: 11982: 11935194419491982
Days per year at Grindstone Island with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 1 in 1935.
Days at or above 30 C (86 F) per year at Grindstone Island
YearDaysDecade average
193511
194411
194911
198211
First to last qualifying date each year at Grindstone Island For each year, a bar from the first to the last day at Grindstone Island meeting 30 C (86 F). 1935: 19 August 1935 to 19 August 19351944: 14 August 1944 to 14 August 19441949: 31 July 1949 to 31 July 19491982: 28 July 1982 to 28 July 19821935194419491982JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Grindstone Island meeting 30 C (86 F).
First to last qualifying date each year at Grindstone Island
YearFirst dateLast date
19351935-08-191935-08-19
19441944-08-141944-08-14
19491949-07-311949-07-31
19821982-07-281982-07-28

Every Fixed Threshold

Fixed thresholds at Grindstone Island
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days4119351
0 C (32 F): Ice days (max54121196589
0 C (32 F): Frost days (min541971972157
-10 C (14 F): Days with min5482193455
-20 C (-4 F): Days with min321919342
20 C (68 F): Tropical nights (min7319521
10 mm (0.39 in): Days with 10 mm or more rain5449189234
25 mm (0.98 in): Days with 25 mm or more rain531218958
50 mm (1.97 in): Days with 50 mm or more rain20319492
10 cm (3.9 in): Days with 10 cm or more snowfall5120196410
25 cm (9.8 in): Days with 25 cm or more snowfall31619643
50 cm (19.7 in): Days with 50 cm or more snowfall4119491

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1935.

Download the Data

  • Data for Grindstone Island 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).