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Built 2026-10-16 (16 October 2026)

Loch Lomond Threshold Days by Year

4 fixed thresholds counted per year at Loch Lomond (ASN00041234): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Loch Lomond Thresholds

  • Loch Lomond: days with 10 mm (0.39 in) or more of precipitation in 30 years, most in 1975 with 33.
  • Loch Lomond: days with 25 mm (0.98 in) or more of precipitation in 30 years, most in 1975 with 14.
  • Loch Lomond: days with 50 mm (1.97 in) or more of precipitation in 24 years, most in 1962 with 3.
  • Loch Lomond: days with 100 mm (3.94 in) or more of precipitation in 3 years, most in 1965 with 1.
  • 4 fixed thresholds have at least one qualifying day at Loch Lomond.
30 years with a qualifying day
Days with 10 mm (0.39 in) or more of precipitation per year at Loch Lomond Days per year at Loch Lomond with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 33 in 1975. 0102030401960: 171961: 171962: 251963: 161964: 201965: 181966: 191967: 221968: 191969: 121970: 191971: 261972: 241974: 181975: 331976: 221977: 141978: 321979: 181980: 191981: 251982: 131983: 301984: 221985: 171986: 231987: 251988: 231989: 231990: 181960196319661969197219761979198219851988
Days per year at Loch Lomond with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 33 in 1975.
Days with 10 mm (0.39 in) or more of precipitation per year at Loch Lomond
YearDaysDecade average
19601718.5
19611718.5
19622518.5
19631618.5
19642018.5
19651818.5
19661918.5
19672218.5
19681918.5
19691218.5
19701922.9
19712622.9
19722422.9
19741822.9
19753322.9
19762222.9
19771422.9
19783222.9
19791822.9
19801922
19812522
19821322
19833022
19842222
19851722
19862322
19872522
19882322
19892322
19901818
First to last qualifying date each year at Loch Lomond For each year, a bar from the first to the last day at Loch Lomond meeting 10 mm (0.39 in). 1960: 22 January 1960 to 16 December 19601961: 4 January 1961 to 20 December 19611962: 5 January 1962 to 25 December 19621963: 1 January 1963 to 31 December 19631964: 1 January 1964 to 26 December 19641965: 31 January 1965 to 15 December 19651966: 20 February 1966 to 29 December 19661967: 5 January 1967 to 29 December 19671968: 10 January 1968 to 5 December 19681969: 2 January 1969 to 15 November 19691970: 2 January 1970 to 16 December 19701971: 14 January 1971 to 28 December 19711972: 14 January 1972 to 29 December 19721974: 1 January 1974 to 9 December 19741975: 5 January 1975 to 24 December 19751976: 13 January 1976 to 24 December 19761977: 4 January 1977 to 20 December 19771978: 3 January 1978 to 27 December 19781979: 19 January 1979 to 13 November 19791980: 2 January 1980 to 26 December 19801981: 1 January 1981 to 24 December 19811982: 21 January 1982 to 3 December 19821983: 11 January 1983 to 11 December 19831984: 17 January 1984 to 30 December 19841985: 25 January 1985 to 27 December 19851986: 10 January 1986 to 25 December 19861987: 3 January 1987 to 12 December 19871988: 17 January 1988 to 12 December 19881989: 6 January 1989 to 27 December 19891990: 13 January 1990 to 30 December 199019601964196819721977198119851989JanFebMarAprMayJunJulAugSepOctNovDec
For each year, a bar from the first to the last day at Loch Lomond meeting 10 mm (0.39 in).
First to last qualifying date each year at Loch Lomond
YearFirst dateLast date
19601960-01-221960-12-16
19611961-01-041961-12-20
19621962-01-051962-12-25
19631963-01-011963-12-31
19641964-01-011964-12-26
19651965-01-311965-12-15
19661966-02-201966-12-29
19671967-01-051967-12-29
19681968-01-101968-12-05
19691969-01-021969-11-15
19701970-01-021970-12-16
19711971-01-141971-12-28
19721972-01-141972-12-29
19741974-01-011974-12-09
19751975-01-051975-12-24
19761976-01-131976-12-24
19771977-01-041977-12-20
19781978-01-031978-12-27
19791979-01-191979-11-13
19801980-01-021980-12-26
19811981-01-011981-12-24
19821982-01-211982-12-03
19831983-01-111983-12-11
19841984-01-171984-12-30
19851985-01-251985-12-27
19861986-01-101986-12-25
19871987-01-031987-12-12
19881988-01-171988-12-12
19891989-01-061989-12-27
19901990-01-131990-12-30

Every Fixed Threshold

Fixed thresholds at Loch Lomond
ThresholdYears with a qualifying dayMost days in a yearYearLatest year days
10 mm (0.39 in): Days with 10 mm or more rain3033197518
25 mm (0.98 in): Days with 25 mm or more rain3014197510
50 mm (1.97 in): Days with 50 mm or more rain24319621
100 mm (3.94 in): Days with 100 mm or more rain3119651

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 Loch Lomond 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 2026-10-14 (14 October 2026). Threshold counts are computed by this site.

Data as of . Last revised (2025-12-31).