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Built 2026-10-17 (17 October 2026)

Merry Island Lightstation Threshold Days by Year

11 fixed thresholds counted per year at Merry Island Lightstation (CA001045100): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Merry Island Lightstation Thresholds

  • Merry Island Lightstation: days with 10 mm (0.39 in) or more of precipitation in 26 years, most in 1980 with 43.
  • Merry Island Lightstation: days with 25 mm (0.98 in) or more of precipitation in 25 years, most in 1968 with 9.
  • Merry Island Lightstation: nights with a minimum temperature at or below 0 C (32 F) in 24 years, most in 1971 with 38.
  • Merry Island Lightstation: days with a maximum temperature at or below 0 C (32 F) in 15 years, most in 1969 with 11.
  • 11 fixed thresholds have at least one qualifying day at Merry Island Lightstation.
24 years with a qualifying day
Nights at or below 0 C (32 F) per year at Merry Island Lightstation Days per year at Merry Island Lightstation with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 38 in 1971. 0102030401960: 51961: 61962: 151963: 111964: 101965: 51966: 51967: 41968: 121969: 191970: 151971: 381972: 371973: 191974: 221975: 381976: 121977: 171978: 121979: 141980: 151981: 21982: 91983: 819601963196619691972197519781981
Days per year at Merry Island Lightstation with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 38 in 1971.
Nights at or below 0 C (32 F) per year at Merry Island Lightstation
YearDaysDecade average
196059.2
196169.2
1962159.2
1963119.2
1964109.2
196559.2
196659.2
196749.2
1968129.2
1969199.2
19701522.4
19713822.4
19723722.4
19731922.4
19742222.4
19753822.4
19761222.4
19771722.4
19781222.4
19791422.4
1980158.5
198128.5
198298.5
198388.5
First to last qualifying date each year at Merry Island Lightstation For each year, a bar from the first to the last day at Merry Island Lightstation meeting 0 C (32 F). 1960: 26 February 1960 to 4 March 19601961: 27 January 1961 to 13 December 19611962: 18 January 1962 to 4 March 19621963: 10 January 1963 to 1 February 19631964: 29 November 1964 to 31 December 19641965: 3 January 1965 to 31 December 19651966: 1 January 1966 to 9 November 19661967: 7 January 1967 to 21 December 19671968: 10 January 1968 to 31 December 19681969: 8 January 1969 to 6 February 19691970: 16 January 1970 to 24 December 19701971: 2 January 1971 to 30 December 19711972: 2 January 1972 to 14 December 19721973: 3 January 1973 to 31 December 19731974: 1 January 1974 to 22 March 19741975: 9 January 1975 to 17 December 19751976: 20 January 1976 to 19 December 19761977: 7 January 1977 to 31 December 19771978: 1 January 1978 to 31 December 19781979: 1 January 1979 to 14 February 19791980: 7 January 1980 to 8 December 19801981: 10 February 1981 to 11 February 19811982: 2 January 1982 to 9 February 19821983: 5 February 1983 to 28 December 198319601963196619691972197519781981JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Merry Island Lightstation meeting 0 C (32 F).
First to last qualifying date each year at Merry Island Lightstation
YearFirst dateLast date
19601960-02-261960-03-04
19611961-01-271961-12-13
19621962-01-181962-03-04
19631963-01-101963-02-01
19641964-11-291964-12-31
19651965-01-031965-12-31
19661966-01-011966-11-09
19671967-01-071967-12-21
19681968-01-101968-12-31
19691969-01-081969-02-06
19701970-01-161970-12-24
19711971-01-021971-12-30
19721972-01-021972-12-14
19731973-01-031973-12-31
19741974-01-011974-03-22
19751975-01-091975-12-17
19761976-01-201976-12-19
19771977-01-071977-12-31
19781978-01-011978-12-31
19791979-01-011979-02-14
19801980-01-071980-12-08
19811981-02-101981-02-11
19821982-01-021982-02-09
19831983-02-051983-12-28

Every Fixed Threshold

Fixed thresholds at Merry Island Lightstation
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
30 C (86 F): Days2119601
90 F (32.2 C): Days1119611
0 C (32 F): Ice days (max151119694
0 C (32 F): Frost days (min243819718
-10 C (14 F): Days with min1319683
20 C (68 F): Tropical nights (min1119671
10 mm (0.39 in): Days with 10 mm or more rain2643198043
25 mm (0.98 in): Days with 25 mm or more rain25919685
50 mm (1.97 in): Days with 50 mm or more rain8119631
10 cm (3.9 in): Days with 10 cm or more snowfall9519712
25 cm (9.8 in): Days with 25 cm or more snowfall2119681

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1960.

Download the Data

  • Data for Merry Island Lightstation 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2026-10-15).