Bluestone Lake Weather Records (USC00460939)

Record envelope, standing records and threshold days for Bluestone Lake (USC00460939), West Virginia, United States, with 84 years of record.

Key Facts for Bluestone Lake

Bluestone Lake (USC00460939) is a weather station in West Virginia, United States at 37.64 latitude and -80.88 longitude, 425 m (1,393 ft) above sea level.
The station reports from 1943 to 2026, 84 years of record.
1,464 records set at Bluestone Lake still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Bluestone Lake set a daily record precipitation of 31.8 mm (1.3 in) on 7 August 2026.

About the Station

Location: West Virginia, United States, 37.64 latitude, -80.88 longitude.
Elevation: 425 m (1,393 ft).
Period of record: 1943 to 2026, 84 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Bluestone Lake. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Bluestone Lake, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	25.0 C (77.0 F)	-27.2 C (-17.0 F)	n/a	n/a
Feb	25.6 C (78.1 F)	-25.0 C (-13.0 F)	n/a	n/a
Mar	29.4 C (84.9 F)	-17.8 C (0.0 F)	n/a	n/a
Apr	32.2 C (90.0 F)	-7.8 C (18.0 F)	n/a	n/a
May	33.9 C (93.0 F)	-2.2 C (28.0 F)	n/a	n/a
Jun	37.8 C (100.0 F)	2.2 C (36.0 F)	n/a	n/a
Jul	37.8 C (100.0 F)	7.2 C (45.0 F)	n/a	n/a
Aug	39.4 C (102.9 F)	5.0 C (41.0 F)	n/a	n/a
Sep	37.2 C (99.0 F)	-0.6 C (30.9 F)	n/a	n/a
Oct	34.4 C (93.9 F)	-7.8 C (18.0 F)	n/a	n/a
Nov	28.9 C (84.0 F)	-13.3 C (8.1 F)	n/a	n/a
Dec	25.0 C (77.0 F)	-22.8 C (-9.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Bluestone Lake still stand. 1947 holds the most, with 50.

Standing records at Bluestone Lake by the year they were set
Year set	Standing records
1943	37
1944	35
1945	29
1946	46
1947	50
1948	33
1949	31
1950	26
1951	16
1952	23
1953	21
1954	32
1955	24
1956	21
1957	17
1958	13
1959	15
1960	20
1961	15
1962	23
1963	30
1964	25
1965	21
1966	19
1967	23
1968	17
1969	22
1970	24
1971	21
1972	25
1973	18
1974	21
1975	7
1976	22
1977	32
1978	12
1979	26
1980	15
1981	10
1982	21
1983	17
1984	25
1985	17
1986	28
1987	18
1988	28
1989	24
1990	12
1991	21
1992	12
1993	12
1994	9
1995	23
1996	21
1997	14
1998	18
1999	17
2000	11
2001	25
2002	23
2003	8
2004	24
2005	47
2006	21
2007	2
2011	18
2012	25
2013	6

All-Time Record Progression

12 new records

12 all-time records were set at Bluestone Lake between 17 January 1977 and 19 December 2009. Each dot is a new record.

When Bluestone Lake set new all-time records
Date	Kind	Detail
1977-01-17	Record low minimum temperature	Record low minimum temperature -23.9 C (-11.0 F)
1977-01-18	Record low minimum temperature	Record low minimum temperature -25.0 C (-13.0 F)
1980-03-02	Record daily snowfall	Record daily snowfall 30.5 cm (12.0 in)
1982-01-11	Record low maximum temperature	Record low maximum temperature -16.7 C (1.9 F)
1985-01-21	Record low minimum temperature	Record low minimum temperature -27.2 C (-17.0 F)
1987-01-26	Record snow depth	Record snow depth 45.7 cm (18.0 in)
1993-03-14	Record snow depth	Record snow depth 48.3 cm (19.0 in)
1995-06-20	Record high minimum temperature	Record high minimum temperature 24.4 C (75.9 F)
1995-06-25	Record high minimum temperature	Record high minimum temperature 25.6 C (78.1 F)
1996-01-07	Record daily snowfall	Record daily snowfall 40.6 cm (16.0 in)
1996-01-08	Record snow depth	Record snow depth 58.4 cm (23.0 in)
2009-12-19	Record daily snowfall	Record daily snowfall 48.3 cm (19.0 in)

Wettest Day of Each Month

Aug: 100.1 mm (3.9 in)

The wettest day on record for each calendar month at Bluestone Lake. The most was 100.1 mm (3.9 in) on 20 August 1969.

Record daily precipitation for each month at Bluestone Lake
Month	Record daily precipitation (mm)	Date
Jan	68.8 mm (2.7 in)	28 January 1998
Feb	57.2 mm (2.3 in)	16 February 2025
Mar	84.1 mm (3.3 in)	12 March 1963
Apr	53.6 mm (2.1 in)	25 April 1987
May	88.9 mm (3.5 in)	27 May 1954
Jun	70.1 mm (2.8 in)	5 June 1992
Jul	70.9 mm (2.8 in)	2 July 1986
Aug	100.1 mm (3.9 in)	20 August 1969
Sep	71.6 mm (2.8 in)	14 September 1966
Oct	64.8 mm (2.6 in)	24 October 2017
Nov	53.3 mm (2.1 in)	10 November 1962
Dec	50.8 mm (2.0 in)	19 December 2009

Period of Record Coverage

1943 to 2013

68 years of record at Bluestone Lake, 1943 to 2013. 3 years have data for under 90 percent of days and are left out of rankings: 1943, 2007, 2013.

Days with data per year at Bluestone Lake
Year	Days with data	Share of year	Complete
1943	304	83%	No
1944	360	98%	Yes
1945	358	98%	Yes
1946	354	97%	Yes
1947	358	98%	Yes
1948	357	98%	Yes
1949	365	100%	Yes
1950	363	99%	Yes
1951	365	100%	Yes
1952	364	99%	Yes
1953	365	100%	Yes
1954	364	100%	Yes
1955	364	100%	Yes
1956	365	100%	Yes
1957	365	100%	Yes
1958	365	100%	Yes
1959	365	100%	Yes
1960	366	100%	Yes
1961	365	100%	Yes
1962	365	100%	Yes
1963	365	100%	Yes
1964	366	100%	Yes
1965	365	100%	Yes
1966	365	100%	Yes
1967	365	100%	Yes
1968	366	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	363	99%	Yes
1975	365	100%	Yes
1976	335	92%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	364	100%	Yes
1980	366	100%	Yes
1981	363	99%	Yes
1982	364	100%	Yes
1983	365	100%	Yes
1984	364	99%	Yes
1985	364	100%	Yes
1986	364	100%	Yes
1987	365	100%	Yes
1988	366	100%	Yes
1989	365	100%	Yes
1990	364	100%	Yes
1991	365	100%	Yes
1992	365	100%	Yes
1993	364	100%	Yes
1994	365	100%	Yes
1995	365	100%	Yes
1996	366	100%	Yes
1997	365	100%	Yes
1998	364	100%	Yes
1999	365	100%	Yes
2000	365	100%	Yes
2001	365	100%	Yes
2002	365	100%	Yes
2003	362	99%	Yes
2004	361	99%	Yes
2005	358	98%	Yes
2006	364	100%	Yes
2007	59	16%	No
2011	365	100%	Yes
2012	365	100%	Yes
2013	212	58%	No

Latest Records

Latest records at Bluestone Lake
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
7 August 2026	Bluestone Lake, US	daily rain	31.8 mm (1.3 in)	5.1 mm (0.20 in)	48 years	27 of 100 (Routine)
3 August 2026	Bluestone Lake, US	daily rain	27.9 mm (1.1 in)	6.3 mm (0.25 in)	17 years	19 of 100 (Routine)
25 January 2026	Bluestone Lake, US	daily snowfall	8.9 cm (3.5 in)	1.3 cm (0.5 in)	39 years	21 of 100 (Routine)
25 January 2026	Bluestone Lake, US	daily rain	31.8 mm (1.3 in)	3.9 mm (0.15 in)	16 years	16 of 100 (Routine)
2 August 2025	Bluestone Lake, US	daily rain	35.6 mm (1.4 in)	6.6 mm (0.26 in)	7 years	16 of 100 (Routine)
27 June 2025	Bluestone Lake, US	daily rain	27.9 mm (1.1 in)	1.2 mm (0.05 in)	31 years	18 of 100 (Routine)
17 May 2025	Bluestone Lake, US	daily rain	35.6 mm (1.4 in)	8.4 mm (0.33 in)	24 years	24 of 100 (Routine)
14 May 2025	Bluestone Lake, US	daily rain	35.6 mm (1.4 in)	5.1 mm (0.20 in)	71 years	34 of 100 (Routine)
16 February 2025	Bluestone Lake, US	monthly rain	57.2 mm (2.3 in)	3.1 mm (0.12 in)	7 years	23 of 100 (Routine)
12 February 2025	Bluestone Lake, US	daily snowfall	15.2 cm (6.0 in)	10.1 cm (4.0 in)	62 years	44 of 100 (Notable)
12 February 2025	Bluestone Lake, US	daily rain	27.9 mm (1.1 in)	9.4 mm (0.37 in)	40 years	31 of 100 (Routine)
1 February 2025	Bluestone Lake, US	daily rain	26.2 mm (1.0 in)	1.1 mm (0.04 in)	74 years	31 of 100 (Routine)
6 January 2025	Bluestone Lake, US	daily rain	43.7 mm (1.7 in)	28.5 mm (1.1 in)	76 years	65 of 100 (Major)
6 January 2025	Bluestone Lake, US	daily snowfall (Tie)	7.6 cm (3.0 in)	tie	65 years	6 of 100 (Routine)
26 September 2024	Bluestone Lake, US	daily rain	63.5 mm (2.5 in)	23.9 mm (0.9 in)	24 years	37 of 100 (Notable)
16 January 2024	Bluestone Lake, US	daily snowfall (Tie)	10.2 cm (4.0 in)	tie	66 years	7 of 100 (Routine)
27 December 2023	Bluestone Lake, US	daily rain	30.5 mm (1.2 in)	16.5 mm (0.6 in)	10 years	31 of 100 (Routine)
19 July 2023	Bluestone Lake, US	daily rain	42.2 mm (1.7 in)	14.3 mm (0.6 in)	68 years	41 of 100 (Notable)
16 July 2023	Bluestone Lake, US	daily rain	29.2 mm (1.1 in)	4.6 mm (0.18 in)	48 years	26 of 100 (Routine)
17 February 2023	Bluestone Lake, US	daily rain	46.2 mm (1.8 in)	20.5 mm (0.8 in)	36 years	43 of 100 (Notable)

Climate Trend

63 complete years, 1945 to 2012

One stripe for each of 63 complete years at Bluestone Lake, 1945 to 2012. Blue stripes are years cooler than the station's own mean of 12.0 C (53.6 F); red stripes are warmer. The coolest year was 1963, at 10.6 C (51.1 F), and the warmest was 2006, at 13.9 C (56.9 F). The strongest colour marks a difference of 1.9 C (3.4 F).

Annual mean temperature at Bluestone Lake as warming stripes, 1945 to 2012
Year	Annual mean temperature	Difference from the station mean
1945	12.6 C	+0.53 C
1946	13.1 C	+1.09 C
1947	12.5 C	+0.47 C
1948	13.1 C	+1.11 C
1949	13.5 C	+1.50 C
1950	12.7 C	+0.66 C
1951	12.3 C	+0.28 C
1952	12.9 C	+0.84 C
1953	12.9 C	+0.92 C
1954	12.3 C	+0.25 C
1955	12.2 C	+0.19 C
1956	12.2 C	+0.22 C
1957	12.7 C	+0.65 C
1958	11.0 C	-1.04 C
1959	12.3 C	+0.30 C
1960	11.2 C	-0.83 C
1961	11.6 C	-0.45 C
1962	11.5 C	-0.51 C
1963	10.6 C	-1.42 C
1964	11.5 C	-0.54 C
1965	11.8 C	-0.23 C
1966	10.9 C	-1.15 C
1967	11.1 C	-0.94 C
1968	11.0 C	-1.01 C
1969	10.8 C	-1.22 C
1970	12.0 C	-0.05 C
1971	11.7 C	-0.32 C
1972	11.4 C	-0.64 C
1973	12.4 C	+0.35 C
1974	12.0 C	-0.04 C
1975	12.3 C	+0.23 C
1977	11.3 C	-0.68 C
1978	11.1 C	-0.92 C
1979	11.0 C	-1.00 C
1980	11.2 C	-0.79 C
1981	11.0 C	-1.06 C
1982	11.8 C	-0.23 C
1983	11.4 C	-0.67 C
1984	11.7 C	-0.34 C
1985	11.9 C	-0.17 C
1986	12.1 C	+0.11 C
1987	12.2 C	+0.16 C
1988	11.2 C	-0.87 C
1989	11.4 C	-0.61 C
1990	13.0 C	+1.02 C
1991	12.8 C	+0.78 C
1992	11.6 C	-0.44 C
1993	11.9 C	-0.13 C
1994	11.8 C	-0.19 C
1995	11.7 C	-0.33 C
1996	10.7 C	-1.36 C
1997	11.0 C	-0.99 C
1998	13.6 C	+1.53 C
1999	12.6 C	+0.56 C
2000	11.9 C	-0.15 C
2001	12.6 C	+0.60 C
2002	12.9 C	+0.84 C
2003	12.0 C	+0.02 C
2004	12.7 C	+0.68 C
2005	12.8 C	+0.82 C
2006	13.9 C	+1.83 C
2011	13.2 C	+1.19 C
2012	13.6 C	+1.55 C

The fitted trend in annual mean temperature here over 1945 to 2012 is 0.03 C (-0.07 to 0.14) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.3) per decade. The slope is a straight line fitted to 63 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Bluestone Lake
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.03 C (-0.07 to 0.14) per decade	0.1 F (-0.1 to 0.3) per decade	1945 to 2012	63	Not clearly different from zero
Mean daily maximum	-0.16 C (-0.28 to -0.03) per decade	-0.3 F (-0.5 to -0.1) per decade	1945 to 2012	63	Fall
Mean daily minimum	0.2 C (0.1 to 0.3) per decade	0.4 F (0.2 to 0.6) per decade	1945 to 2012	63	Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1943 to 2026

Yearly extremes at Bluestone Lake: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	39.4 C (102.9 F)	1948	34.4 C (93.9 F)	68
Coldest night (TNn)	-27.2 C (-17.0 F)	1985	-16.7 C (1.9 F)	68
Wettest day (Rx1day)	100.1 mm (3.9 in)	1969	48.3 mm (1.9 in)	84
Wettest five days (Rx5day)	159.8 mm (6.3 in)	2001	79.5 mm (3.1 in)	84
Longest dry spell (CDD)	33 days	2007	17 days	84

Hottest day (TXx)

The hottest day of the year at Bluestone Lake, 1943 to 2026. The record is 39.4 C (102.9 F) in 1948, marked on the chart; the median year is 34.4 C (93.9 F).

Hottest day (TXx) at Bluestone Lake by year
Year	Hottest day (TXx)
1943	36.1 C (97.0 F)
1944	36.7 C (98.1 F)
1945	36.1 C (97.0 F)
1946	36.7 C (98.1 F)
1947	37.8 C (100.0 F)
1948	39.4 C (102.9 F)
1949	36.7 C (98.1 F)
1950	34.4 C (93.9 F)
1951	36.7 C (98.1 F)
1952	37.8 C (100.0 F)
1953	37.2 C (99.0 F)
1954	37.8 C (100.0 F)
1955	37.2 C (99.0 F)
1956	33.3 C (91.9 F)
1957	35.0 C (95.0 F)
1958	32.8 C (91.0 F)
1959	35.0 C (95.0 F)
1960	33.3 C (91.9 F)
1961	32.8 C (91.0 F)
1962	33.3 C (91.9 F)
1963	33.3 C (91.9 F)
1964	34.4 C (93.9 F)
1965	34.4 C (93.9 F)
1966	35.0 C (95.0 F)
1967	32.8 C (91.0 F)
1968	34.4 C (93.9 F)
1969	34.4 C (93.9 F)
1970	34.4 C (93.9 F)
1971	34.4 C (93.9 F)
1972	32.8 C (91.0 F)
1973	33.3 C (91.9 F)
1974	31.7 C (89.1 F)
1975	35.6 C (96.1 F)
1976	32.2 C (90.0 F)
1977	34.4 C (93.9 F)
1978	34.4 C (93.9 F)
1979	32.2 C (90.0 F)
1980	35.0 C (95.0 F)
1981	32.2 C (90.0 F)
1982	32.2 C (90.0 F)
1983	35.6 C (96.1 F)
1984	33.3 C (91.9 F)
1985	32.2 C (90.0 F)
1986	33.3 C (91.9 F)
1987	36.1 C (97.0 F)
1988	37.2 C (99.0 F)
1989	32.8 C (91.0 F)
1990	34.4 C (93.9 F)
1991	35.0 C (95.0 F)
1992	31.7 C (89.1 F)
1993	35.6 C (96.1 F)
1994	33.9 C (93.0 F)
1995	35.6 C (96.1 F)
1996	32.2 C (90.0 F)
1997	33.9 C (93.0 F)
1998	35.6 C (96.1 F)
1999	35.6 C (96.1 F)
2000	32.2 C (90.0 F)
2001	33.3 C (91.9 F)
2002	34.4 C (93.9 F)
2003	32.8 C (91.0 F)
2004	32.2 C (90.0 F)
2005	33.3 C (91.9 F)
2006	33.3 C (91.9 F)
2007	18.3 C (64.9 F)
2008	n/a
2009	n/a
2010	n/a
2011	37.8 C (100.0 F)
2012	37.2 C (99.0 F)
2013	33.9 C (93.0 F)
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Coldest night (TNn)

The coldest night of the year at Bluestone Lake, 1943 to 2026. The record is -27.2 C (-17.0 F) in 1985, marked on the chart; the median year is -16.7 C (1.9 F).

Coldest night (TNn) at Bluestone Lake by year
Year	Coldest night (TNn)
1943	-16.1 C (3.0 F)
1944	-15.0 C (5.0 F)
1945	-15.6 C (3.9 F)
1946	-16.1 C (3.0 F)
1947	-15.6 C (3.9 F)
1948	-17.2 C (1.0 F)
1949	-13.9 C (7.0 F)
1950	-13.3 C (8.1 F)
1951	-16.1 C (3.0 F)
1952	-13.9 C (7.0 F)
1953	-14.4 C (6.1 F)
1954	-12.8 C (9.0 F)
1955	-16.1 C (3.0 F)
1956	-10.6 C (12.9 F)
1957	-17.8 C (0.0 F)
1958	-17.8 C (0.0 F)
1959	-17.8 C (0.0 F)
1960	-17.8 C (0.0 F)
1961	-18.3 C (-0.9 F)
1962	-18.9 C (-2.0 F)
1963	-22.8 C (-9.0 F)
1964	-17.2 C (1.0 F)
1965	-17.8 C (0.0 F)
1966	-18.3 C (-0.9 F)
1967	-17.2 C (1.0 F)
1968	-17.8 C (0.0 F)
1969	-17.8 C (0.0 F)
1970	-22.2 C (-8.0 F)
1971	-16.1 C (3.0 F)
1972	-21.7 C (-7.1 F)
1973	-15.0 C (5.0 F)
1974	-11.7 C (10.9 F)
1975	-12.8 C (9.0 F)
1976	-17.2 C (1.0 F)
1977	-25.0 C (-13.0 F)
1978	-19.4 C (-2.9 F)
1979	-19.4 C (-2.9 F)
1980	-16.1 C (3.0 F)
1981	-18.3 C (-0.9 F)
1982	-23.9 C (-11.0 F)
1983	-22.2 C (-8.0 F)
1984	-21.1 C (-6.0 F)
1985	-27.2 C (-17.0 F)
1986	-18.9 C (-2.0 F)
1987	-20.6 C (-5.1 F)
1988	-17.8 C (0.0 F)
1989	-22.8 C (-9.0 F)
1990	-14.4 C (6.1 F)
1991	-14.4 C (6.1 F)
1992	-13.9 C (7.0 F)
1993	-17.8 C (0.0 F)
1994	-25.6 C (-14.1 F)
1995	-16.7 C (1.9 F)
1996	-25.0 C (-13.0 F)
1997	-16.7 C (1.9 F)
1998	-12.2 C (10.0 F)
1999	-14.4 C (6.1 F)
2000	-17.2 C (1.0 F)
2001	-10.6 C (12.9 F)
2002	-11.7 C (10.9 F)
2003	-14.4 C (6.1 F)
2004	-16.7 C (1.9 F)
2005	-13.9 C (7.0 F)
2006	-13.3 C (8.1 F)
2007	-15.6 C (3.9 F)
2008	n/a
2009	n/a
2010	n/a
2011	-11.1 C (12.0 F)
2012	-10.0 C (14.0 F)
2013	-10.6 C (12.9 F)
2014	n/a
2015	n/a
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Wettest day (Rx1day)

The wettest day of the year at Bluestone Lake, 1943 to 2026. The record is 100.1 mm (3.9 in) in 1969, marked on the chart; the median year is 48.3 mm (1.9 in).

Wettest day (Rx1day) at Bluestone Lake by year
Year	Wettest day (Rx1day)
1943	44.7 mm (1.8 in)
1944	48.3 mm (1.9 in)
1945	35.6 mm (1.4 in)
1946	34.5 mm (1.4 in)
1947	34.8 mm (1.4 in)
1948	33.5 mm (1.3 in)
1949	59.2 mm (2.3 in)
1950	35.1 mm (1.4 in)
1951	30.7 mm (1.2 in)
1952	62.5 mm (2.5 in)
1953	48.3 mm (1.9 in)
1954	88.9 mm (3.5 in)
1955	33.3 mm (1.3 in)
1956	37.8 mm (1.5 in)
1957	34.8 mm (1.4 in)
1958	43.7 mm (1.7 in)
1959	39.1 mm (1.5 in)
1960	30.5 mm (1.2 in)
1961	33.5 mm (1.3 in)
1962	53.3 mm (2.1 in)
1963	84.1 mm (3.3 in)
1964	46.7 mm (1.8 in)
1965	66.3 mm (2.6 in)
1966	71.6 mm (2.8 in)
1967	47.5 mm (1.9 in)
1968	37.3 mm (1.5 in)
1969	100.1 mm (3.9 in)
1970	37.1 mm (1.5 in)
1971	33.3 mm (1.3 in)
1972	46.0 mm (1.8 in)
1973	40.4 mm (1.6 in)
1974	52.3 mm (2.1 in)
1975	61.7 mm (2.4 in)
1976	46.0 mm (1.8 in)
1977	55.9 mm (2.2 in)
1978	46.0 mm (1.8 in)
1979	54.1 mm (2.1 in)
1980	52.1 mm (2.1 in)
1981	35.6 mm (1.4 in)
1982	48.8 mm (1.9 in)
1983	36.8 mm (1.4 in)
1984	48.3 mm (1.9 in)
1985	40.6 mm (1.6 in)
1986	70.9 mm (2.8 in)
1987	53.6 mm (2.1 in)
1988	55.4 mm (2.2 in)
1989	39.1 mm (1.5 in)
1990	41.4 mm (1.6 in)
1991	36.8 mm (1.4 in)
1992	70.1 mm (2.8 in)
1993	49.0 mm (1.9 in)
1994	47.0 mm (1.9 in)
1995	39.1 mm (1.5 in)
1996	51.3 mm (2.0 in)
1997	31.8 mm (1.3 in)
1998	68.8 mm (2.7 in)
1999	62.0 mm (2.4 in)
2000	39.6 mm (1.6 in)
2001	54.4 mm (2.1 in)
2002	49.5 mm (1.9 in)
2003	48.3 mm (1.9 in)
2004	55.1 mm (2.2 in)
2005	57.4 mm (2.3 in)
2006	37.6 mm (1.5 in)
2007	60.2 mm (2.4 in)
2008	53.8 mm (2.1 in)
2009	57.2 mm (2.3 in)
2010	47.0 mm (1.9 in)
2011	47.0 mm (1.9 in)
2012	55.6 mm (2.2 in)
2013	49.5 mm (1.9 in)
2014	47.0 mm (1.9 in)
2015	53.3 mm (2.1 in)
2016	48.3 mm (1.9 in)
2017	64.8 mm (2.6 in)
2018	65.5 mm (2.6 in)
2019	57.2 mm (2.3 in)
2020	59.2 mm (2.3 in)
2021	52.8 mm (2.1 in)
2022	53.1 mm (2.1 in)
2023	46.2 mm (1.8 in)
2024	63.5 mm (2.5 in)
2025	57.2 mm (2.3 in)
2026	37.3 mm (1.5 in)

Wettest five days (Rx5day)

The wettest five days of the year at Bluestone Lake, 1943 to 2026. The record is 159.8 mm (6.3 in) in 2001, marked on the chart; the median year is 79.5 mm (3.1 in).

Wettest five days (Rx5day) at Bluestone Lake by year
Year	Wettest five days (Rx5day)
1943	88.7 mm (3.5 in)
1944	53.4 mm (2.1 in)
1945	100.6 mm (4.0 in)
1946	75.4 mm (3.0 in)
1947	77.7 mm (3.1 in)
1948	72.7 mm (2.9 in)
1949	73.4 mm (2.9 in)
1950	84.0 mm (3.3 in)
1951	48.2 mm (1.9 in)
1952	81.1 mm (3.2 in)
1953	81.3 mm (3.2 in)
1954	103.8 mm (4.1 in)
1955	80.7 mm (3.2 in)
1956	66.2 mm (2.6 in)
1957	81.0 mm (3.2 in)
1958	62.3 mm (2.5 in)
1959	63.0 mm (2.5 in)
1960	36.8 mm (1.4 in)
1961	63.0 mm (2.5 in)
1962	79.7 mm (3.1 in)
1963	84.6 mm (3.3 in)
1964	92.2 mm (3.6 in)
1965	82.6 mm (3.3 in)
1966	77.7 mm (3.1 in)
1967	64.3 mm (2.5 in)
1968	72.2 mm (2.8 in)
1969	116.8 mm (4.6 in)
1970	76.7 mm (3.0 in)
1971	55.7 mm (2.2 in)
1972	101.2 mm (4.0 in)
1973	68.4 mm (2.7 in)
1974	63.7 mm (2.5 in)
1975	76.7 mm (3.0 in)
1976	76.2 mm (3.0 in)
1977	101.4 mm (4.0 in)
1978	72.3 mm (2.8 in)
1979	82.6 mm (3.3 in)
1980	99.6 mm (3.9 in)
1981	59.0 mm (2.3 in)
1982	69.8 mm (2.7 in)
1983	102.2 mm (4.0 in)
1984	99.1 mm (3.9 in)
1985	77.9 mm (3.1 in)
1986	94.8 mm (3.7 in)
1987	100.0 mm (3.9 in)
1988	63.8 mm (2.5 in)
1989	89.9 mm (3.5 in)
1990	72.4 mm (2.9 in)
1991	84.8 mm (3.3 in)
1992	83.3 mm (3.3 in)
1993	65.7 mm (2.6 in)
1994	94.5 mm (3.7 in)
1995	49.1 mm (1.9 in)
1996	90.2 mm (3.6 in)
1997	65.6 mm (2.6 in)
1998	100.5 mm (4.0 in)
1999	76.2 mm (3.0 in)
2000	65.0 mm (2.6 in)
2001	159.8 mm (6.3 in)
2002	81.3 mm (3.2 in)
2003	94.7 mm (3.7 in)
2004	103.4 mm (4.1 in)
2005	86.6 mm (3.4 in)
2006	83.3 mm (3.3 in)
2007	107.2 mm (4.2 in)
2008	62.2 mm (2.4 in)
2009	72.8 mm (2.9 in)
2010	56.5 mm (2.2 in)
2011	101.2 mm (4.0 in)
2012	77.2 mm (3.0 in)
2013	82.6 mm (3.3 in)
2014	76.5 mm (3.0 in)
2015	62.5 mm (2.5 in)
2016	67.3 mm (2.6 in)
2017	64.8 mm (2.6 in)
2018	88.6 mm (3.5 in)
2019	98.7 mm (3.9 in)
2020	109.2 mm (4.3 in)
2021	78.9 mm (3.1 in)
2022	85.3 mm (3.4 in)
2023	79.3 mm (3.1 in)
2024	152.1 mm (6.0 in)
2025	106.7 mm (4.2 in)
2026	66.6 mm (2.6 in)

Longest dry spell (CDD)

The longest dry spell of the year at Bluestone Lake, 1943 to 2026. The record is 33 days in 2007, marked on the chart; the median year is 17 days.

Longest dry spell (CDD) at Bluestone Lake by year
Year	Longest dry spell (CDD)
1943	27 days
1944	22 days
1945	13 days
1946	18 days
1947	15 days
1948	13 days
1949	16 days
1950	14 days
1951	29 days
1952	24 days
1953	28 days
1954	15 days
1955	16 days
1956	17 days
1957	23 days
1958	22 days
1959	22 days
1960	11 days
1961	16 days
1962	11 days
1963	30 days
1964	16 days
1965	17 days
1966	16 days
1967	18 days
1968	29 days
1969	15 days
1970	13 days
1971	17 days
1972	11 days
1973	19 days
1974	17 days
1975	15 days
1976	29 days
1977	18 days
1978	28 days
1979	16 days
1980	14 days
1981	16 days
1982	12 days
1983	23 days
1984	12 days
1985	29 days
1986	18 days
1987	19 days
1988	15 days
1989	15 days
1990	14 days
1991	22 days
1992	17 days
1993	17 days
1994	14 days
1995	19 days
1996	11 days
1997	29 days
1998	20 days
1999	22 days
2000	22 days
2001	29 days
2002	18 days
2003	13 days
2004	24 days
2005	26 days
2006	15 days
2007	33 days
2008	16 days
2009	11 days
2010	15 days
2011	19 days
2012	13 days
2013	18 days
2014	16 days
2015	16 days
2016	16 days
2017	24 days
2018	12 days
2019	21 days
2020	11 days
2021	18 days
2022	13 days
2023	20 days
2024	25 days
2025	18 days
2026	13 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Frost Dates and Growing Season

63 years with a frost

Across 63 years with a frost, the median last spring frost at Bluestone Lake falls on 20 April and the median first autumn frost on 25 October, which leaves a median of 185 days between them.

In 1979 to 2012 the median growing season was 192 days. That is 13 days more than in 1945 to 1974.

Fitted over all years, the growing season changes by +4.8 days per decade at this station.

Frost dates and growing season at Bluestone Lake
Measure	Median, all years	Earliest period (1945 to 1974)	Recent period (1979 to 2012)	Recent against earliest	Fitted trend
Last spring frost	20 April	25 April	13 April	12 days earlier	-3.4 days per decade
First autumn frost	25 October	21 October	27 October	6 days later	+1.5 days per decade
Growing days	185 days	179 days	192 days	13 days more	+4.8 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

82 years, 1944 to 2025

A day with at least 48.1 mm (1.9 in) of rain is expected about once in 2 years. A day with at least 89.9 mm (3.5 in) of rain is expected about once in 100 years.

Rainfall return levels at Bluestone Lake: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	48.1 mm (1.9 in)
5 years	59.9 mm (2.4 in)
10 years	67.5 mm (2.7 in)
25 years	76.7 mm (3.0 in)
50 years	83.4 mm (3.3 in)
100 years	89.9 mm (3.5 in)	Longer than the 82 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 82 years of values from 1944 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 100.1 mm (3.9 in) in 1969; 88.9 mm (3.5 in) in 1954; 84.1 mm (3.3 in) in 1963.

Station Changes

No change in the annual mean temperature of this station was found against its neighbours.

Download the Data

Data for Bluestone Lake standing records by year: CSV or JSON. Field meanings are on the data page.
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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).