Island Lake Rsvr Threshold Days by Year (USC00214096)

12 fixed thresholds counted per year at Island Lake Rsvr (USC00214096): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Island Lake Rsvr Thresholds

Island Lake Rsvr: days with 10 mm (0.39 in) or more of precipitation in 44 years, most in 1986 with 35.
Island Lake Rsvr: days with 25 mm (0.98 in) or more of precipitation in 44 years, most in 1953 with 10.
Island Lake Rsvr: days with 10 cm (3.9 in) or more of snowfall in 32 years, most in 1972 with 8.
Island Lake Rsvr: days with 50 mm (1.97 in) or more of precipitation in 25 years, most in 1951 with 3.
12 fixed thresholds have at least one qualifying day at Island Lake Rsvr.

Days with 10 mm (0.39 in) or more of precipitation

44 years with a qualifying day

Days per year at Island Lake Rsvr with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 35 in 1986.

Days with 10 mm (0.39 in) or more of precipitation per year at Island Lake Rsvr
Year	Days	Decade average
1949	24	24
1950	18	19.4
1951	25	19.4
1952	22	19.4
1953	22	19.4
1954	16	19.4
1955	24	19.4
1956	19	19.4
1957	16	19.4
1958	19	19.4
1959	13	19.4
1960	19	22.1
1961	20	22.1
1962	16	22.1
1963	18	22.1
1964	28	22.1
1965	24	22.1
1966	24	22.1
1967	17	22.1
1968	31	22.1
1969	24	22.1
1970	25	21.4
1971	22	21.4
1972	25	21.4
1973	21	21.4
1974	14	21.4
1975	20	21.4
1976	10	21.4
1977	24	21.4
1978	31	21.4
1979	22	21.4
1980	16	23.5
1981	29	23.5
1982	31	23.5
1983	24	23.5
1984	20	23.5
1985	25	23.5
1986	35	23.5
1987	18	23.5
1988	27	23.5
1989	10	23.5
1990	18	21.3
1991	28	21.3
1992	18	21.3

For each year, a bar from the first to the last day at Island Lake Rsvr meeting 10 mm (0.39 in).

First to last qualifying date each year at Island Lake Rsvr
Year	First date	Last date
1949	1949-01-23	1949-12-11
1950	1950-01-24	1950-10-01
1951	1951-02-28	1951-11-13
1952	1952-01-15	1952-08-31
1953	1953-03-22	1953-12-04
1954	1954-03-19	1954-09-15
1955	1955-01-31	1955-12-04
1956	1956-01-28	1956-12-14
1957	1957-03-15	1957-10-16
1958	1958-04-22	1958-11-18
1959	1959-05-27	1959-12-24
1960	1960-04-13	1960-12-05
1961	1961-03-28	1961-12-10
1962	1962-04-09	1962-09-24
1963	1963-04-02	1963-11-22
1964	1964-03-20	1964-12-11
1965	1965-02-10	1965-11-27
1966	1966-02-09	1966-10-16
1967	1967-01-07	1967-10-08
1968	1968-03-19	1968-12-23
1969	1969-01-08	1969-12-07
1970	1970-03-04	1970-12-04
1971	1971-02-27	1971-11-18
1972	1972-01-13	1972-12-30
1973	1973-03-12	1973-11-21
1974	1974-04-12	1974-08-26
1975	1975-01-25	1975-11-20
1976	1976-03-12	1976-08-05
1977	1977-03-04	1977-12-18
1978	1978-03-14	1978-12-29
1979	1979-02-21	1979-11-01
1980	1980-01-07	1980-09-09
1981	1981-02-01	1981-12-31
1982	1982-01-23	1982-12-25
1983	1983-01-07	1983-12-11
1984	1984-05-06	1984-12-15
1985	1985-03-28	1985-11-25
1986	1986-01-24	1986-11-07
1987	1987-05-16	1987-09-19
1988	1988-01-11	1988-12-26
1989	1989-01-07	1989-09-20
1990	1990-03-11	1990-12-19
1991	1991-03-22	1991-11-29
1992	1992-04-20	1992-11-08

Every Fixed Threshold

Fixed thresholds at Island Lake Rsvr
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	2	5	1972	5
0 C (32 F): Ice days (max	2	136	1972	136
0 C (32 F): Frost days (min	2	214	1972	214
-10 C (14 F): Days with min	2	122	1972	122
-20 C (-4 F): Days with min	2	67	1972	67
-30 C (-22 F): Days with min	2	18	1972	18
-40 C (-40 F): Days with min	1	2	1972	2
10 mm (0.39 in): Days with 10 mm or more rain	44	35	1986	18
25 mm (0.98 in): Days with 25 mm or more rain	44	10	1953	2
50 mm (1.97 in): Days with 50 mm or more rain	25	3	1951	1
10 cm (3.9 in): Days with 10 cm or more snowfall	32	8	1972	4
25 cm (9.8 in): Days with 25 cm or more snowfall	9	2	1965	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1971.

Download the Data

Data for Island Lake Rsvr 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Island Lake Rsvr Threshold Days by Year (USC00214096)

Key Facts for Island Lake Rsvr Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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