Bluestone Lake Threshold Days by Year

16 fixed thresholds counted per year at Bluestone Lake (USC00460939): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Bluestone Lake Thresholds

Bluestone Lake: days with 10 mm (0.39 in) or more of precipitation in 83 years, most in 2018 with 50.
Bluestone Lake: days with 25 mm (0.98 in) or more of precipitation in 83 years, most in 2002 with 13.
Bluestone Lake: days with a maximum temperature at or above 30 C (86 F) in 65 years, most in 1947 with 93.
Bluestone Lake: nights with a minimum temperature at or below 0 C (32 F) in 65 years, most in 1976 with 142.
16 fixed thresholds have at least one qualifying day at Bluestone Lake.

Days at or above 30 C (86 F)

65 years with a qualifying day

Days per year at Bluestone Lake with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 93 in 1947.

Days at or above 30 C (86 F) per year at Bluestone Lake
Year	Days	Decade average
1944	86	75.8
1945	69	75.8
1946	56	75.8
1947	93	75.8
1948	79	75.8
1949	72	75.8
1950	45	63.3
1951	69	63.3
1952	77	63.3
1953	87	63.3
1954	67	63.3
1955	68	63.3
1956	48	63.3
1957	58	63.3
1958	38	63.3
1959	76	63.3
1960	50	38.7
1961	40	38.7
1962	39	38.7
1963	27	38.7
1964	56	38.7
1965	38	38.7
1966	37	38.7
1967	19	38.7
1968	42	38.7
1969	39	38.7
1970	56	29
1971	27	29
1972	15	29
1973	31	29
1974	16	29
1975	38	29
1976	24	29
1977	30	29
1978	41	29
1979	12	29
1980	41	39
1981	29	39
1982	21	39
1983	45	39
1984	24	39
1985	36	39
1986	50	39
1987	63	39
1988	55	39
1989	26	39
1990	37	39.4
1991	49	39.4
1992	16	39.4
1993	53	39.4
1994	30	39.4
1995	54	39.4
1996	17	39.4
1997	24	39.4
1998	62	39.4
1999	52	39.4
2000	25	33.7
2001	41	33.7
2002	72	33.7
2003	26	33.7
2004	23	33.7
2005	25	33.7
2006	24	33.7
2011	76	70
2012	64	70

For each year, a bar from the first to the last day at Bluestone Lake meeting 30 C (86 F).

First to last qualifying date each year at Bluestone Lake
Year	First date	Last date
1944	1944-04-22	1944-09-21
1945	1945-05-14	1945-10-30
1946	1946-04-02	1946-10-11
1947	1947-04-05	1947-10-24
1948	1948-04-24	1948-09-22
1949	1949-05-05	1949-10-22
1950	1950-04-30	1950-09-12
1951	1951-05-16	1951-10-06
1952	1952-04-23	1952-09-29
1953	1953-05-12	1953-10-06
1954	1954-05-03	1954-10-14
1955	1955-04-20	1955-10-08
1956	1956-05-07	1956-09-14
1957	1957-04-26	1957-09-16
1958	1958-06-06	1958-09-27
1959	1959-05-03	1959-10-06
1960	1960-04-24	1960-09-10
1961	1961-06-03	1961-09-26
1962	1962-05-02	1962-09-15
1963	1963-05-10	1963-09-04
1964	1964-05-09	1964-09-12
1965	1965-05-04	1965-09-22
1966	1966-06-05	1966-09-01
1967	1967-05-28	1967-08-05
1968	1968-06-11	1968-09-25
1969	1969-05-06	1969-08-31
1970	1970-04-30	1970-09-27
1971	1971-05-19	1971-09-10
1972	1972-06-15	1972-08-25
1973	1973-06-05	1973-09-09
1974	1974-05-17	1974-08-29
1975	1975-05-21	1975-09-06
1976	1976-04-18	1976-09-10
1977	1977-05-17	1977-09-03
1978	1978-06-03	1978-09-22
1979	1979-05-09	1979-08-11
1980	1980-05-13	1980-09-15
1981	1981-04-29	1981-08-29
1982	1982-05-13	1982-08-07
1983	1983-06-15	1983-09-11
1984	1984-04-27	1984-09-15
1985	1985-04-21	1985-09-11
1986	1986-04-28	1986-10-02
1987	1987-05-18	1987-08-28
1988	1988-05-24	1988-08-27
1989	1989-05-27	1989-09-11
1990	1990-04-27	1990-09-09
1991	1991-05-26	1991-09-19
1992	1992-07-10	1992-08-28
1993	1993-06-09	1993-09-16
1994	1994-06-06	1994-08-14
1995	1995-06-09	1995-09-07
1996	1996-05-19	1996-08-24
1997	1997-06-22	1997-09-03
1998	1998-05-15	1998-09-29
1999	1999-06-07	1999-09-04
2000	2000-05-08	2000-08-10
2001	2001-04-09	2001-09-13
2002	2002-04-17	2002-09-14
2003	2003-06-12	2003-08-30
2004	2004-04-19	2004-08-29
2005	2005-06-09	2005-09-24
2006	2006-05-26	2006-08-29
2011	2011-04-26	2011-09-05
2012	2012-05-04	2012-09-08

Every Fixed Threshold

Fixed thresholds at Bluestone Lake
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	65	93	1947	64
35 C (95 F): Days	26	14	1952	5
90 F (32.2 C): Days	63	49	1947	31
100 F (37.8 C): Days	5	3	1948	2
0 C (32 F): Ice days (max	64	36	1977	4
0 C (32 F): Frost days (min	65	142	1976	95
-10 C (14 F): Days with min	65	43	1963	2
-20 C (-4 F): Days with min	12	4	1982	3
20 C (68 F): Tropical nights (min	60	47	2005	31
25 C (77 F): Days with min	1	1	1995	1
10 mm (0.39 in): Days with 10 mm or more rain	83	50	2018	29
25 mm (0.98 in): Days with 25 mm or more rain	83	13	2002	7
50 mm (1.97 in): Days with 50 mm or more rain	36	4	2018	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1969	1
10 cm (3.9 in): Days with 10 cm or more snowfall	58	5	1960	1
25 cm (9.8 in): Days with 25 cm or more snowfall	12	2	1996	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1944.

Download the Data

Data for Bluestone Lake 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Bluestone Lake Threshold Days by Year

Key Facts for Bluestone Lake Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related