Cass Lake Weather Records (USC00211374)

Record envelope, standing records and threshold days for Cass Lake (USC00211374), Minnesota, United States, with 121 years of record.

Key Facts for Cass Lake

Cass Lake (USC00211374) is a weather station in Minnesota, United States at 47.38 latitude and -94.61 longitude, 395 m (1,296 ft) above sea level.
The station reports from 1906 to 2026, 121 years of record.
1,464 records set at Cass Lake still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Cass Lake set a daily record high maximum temperature of 31.1 C (88.0 F) on 11 October 2026 (provisional).

Provisional Records

Records set in the last 60 days are provisional until they clear the revision window.

About the Station

Location: Minnesota, United States, 47.38 latitude, -94.61 longitude.
Elevation: 395 m (1,296 ft).
Period of record: 1906 to 2026, 121 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.

Daily Record Envelope and 2026

7 days at or beyond a record

The band shows the record high and record low for each calendar day at Cass Lake. The lines show the 2026 daily maximum and minimum. 7 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Cass Lake, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	13.3 C (55.9 F)	-44.4 C (-47.9 F)	7.2 C (45.0 F)	-35.6 C (-32.1 F)
Feb	15.6 C (60.1 F)	-44.4 C (-47.9 F)	10.6 C (51.1 F)	-28.9 C (-20.0 F)
Mar	23.3 C (73.9 F)	-38.3 C (-36.9 F)	15.6 C (60.1 F)	-25.0 C (-13.0 F)
Apr	35.6 C (96.1 F)	-26.1 C (-15.0 F)	25.6 C (78.1 F)	-16.1 C (3.0 F)
May	35.0 C (95.0 F)	-12.2 C (10.0 F)	32.2 C (90.0 F)	-6.1 C (21.0 F)
Jun	37.8 C (100.0 F)	-3.9 C (25.0 F)	30.0 C (86.0 F)	5.0 C (41.0 F)
Jul	40.0 C (104.0 F)	0.6 C (33.1 F)	35.0 C (95.0 F)	7.8 C (46.0 F)
Aug	38.3 C (100.9 F)	-3.3 C (26.1 F)	29.4 C (84.9 F)	7.2 C (45.0 F)
Sep	36.7 C (98.1 F)	-8.3 C (17.1 F)	28.9 C (84.0 F)	4.4 C (39.9 F)
Oct	33.3 C (91.9 F)	-16.7 C (1.9 F)	31.1 C (88.0 F)	-1.1 C (30.0 F)
Nov	24.4 C (75.9 F)	-35.0 C (-31.0 F)	n/a	n/a
Dec	14.4 C (57.9 F)	-43.3 C (-45.9 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Cass Lake still stand. 1983 holds the most, with 35.

Standing records at Cass Lake by the year they were set
Year set	Standing records
1949	11
1950	12
1951	21
1952	22
1953	22
1954	14
1955	21
1956	19
1957	10
1958	26
1959	17
1960	7
1961	21
1962	34
1963	21
1964	24
1965	25
1966	30
1967	25
1968	25
1969	12
1970	15
1971	16
1972	22
1973	18
1974	26
1975	14
1976	34
1977	34
1978	10
1979	14
1980	20
1981	8
1982	22
1983	35
1984	25
1985	22
1986	17
1987	28
1988	27
1989	31
1990	23
1991	32
1992	24
1993	18
1994	20
1995	22
1996	20
1997	9
1998	9
1999	10
2000	16
2001	15
2002	12
2003	16
2004	14
2005	21
2006	12
2007	12
2008	8
2009	16
2010	11
2011	10
2012	26
2013	9
2014	21
2015	18
2016	22
2017	13
2018	14
2019	14
2020	18
2021	25
2022	11
2023	20
2024	23
2025	17
2026	6

All-Time Record Progression

7 new records

7 all-time records were set at Cass Lake between 2 July 1975 and 20 January 1996. Each dot is a new record.

When Cass Lake set new all-time records
Date	Kind	Detail
1975-07-02	Record daily precipitation	Record daily precipitation 153.9 mm (6.1 in)
1988-01-13	Record daily snowfall	Record daily snowfall 34.3 cm (13.5 in)
1988-07-05	Record high minimum temperature	Record high minimum temperature 24.4 C (75.9 F)
1988-07-06	Record high maximum temperature	Record high maximum temperature 38.9 C (102.0 F)
1988-07-07	Record high maximum temperature	Record high maximum temperature 40.0 C (104.0 F)
1995-11-11	Record daily snowfall	Record daily snowfall 38.1 cm (15.0 in)
1996-01-20	Record low minimum temperature	Record low minimum temperature -44.4 C (-47.9 F)

Wettest Day of Each Month

Jul: 153.9 mm (6.1 in)

The wettest day on record for each calendar month at Cass Lake. The most was 153.9 mm (6.1 in) on 2 July 1975.

Record daily precipitation for each month at Cass Lake
Month	Record daily precipitation (mm)	Date
Jan	25.4 mm (1.0 in)	6 January 1969
Feb	33.0 mm (1.3 in)	18 February 1986
Mar	39.4 mm (1.6 in)	31 March 1995
Apr	53.6 mm (2.1 in)	11 April 2011
May	79.5 mm (3.1 in)	23 May 1962
Jun	102.9 mm (4.1 in)	6 June 1974
Jul	153.9 mm (6.1 in)	2 July 1975
Aug	92.2 mm (3.6 in)	23 August 1978
Sep	103.4 mm (4.1 in)	18 September 1950
Oct	70.1 mm (2.8 in)	3 October 1990
Nov	43.2 mm (1.7 in)	12 November 2005
Dec	53.3 mm (2.1 in)	23 December 1968

Period of Record Coverage

1911 to 2026

79 years of record at Cass Lake, 1911 to 2026. 14 years have data for under 90 percent of days and are left out of rankings: 1911, 1949, 1950, 1951, 1952, 1953, 1954, 1955 and others.

Days with data per year at Cass Lake
Year	Days with data	Share of year	Complete
1911	2	1%	No
1949	233	64%	No
1950	221	61%	No
1951	263	72%	No
1952	248	68%	No
1953	292	80%	No
1954	285	78%	No
1955	234	64%	No
1956	303	83%	No
1957	350	96%	Yes
1958	365	100%	Yes
1959	347	95%	Yes
1960	356	97%	Yes
1961	353	97%	Yes
1962	353	97%	Yes
1963	350	96%	Yes
1964	362	99%	Yes
1965	363	99%	Yes
1966	360	99%	Yes
1967	365	100%	Yes
1968	365	100%	Yes
1969	365	100%	Yes
1970	364	100%	Yes
1971	365	100%	Yes
1972	365	100%	Yes
1973	365	100%	Yes
1974	364	100%	Yes
1975	364	100%	Yes
1976	298	81%	No
1977	365	100%	Yes
1978	357	98%	Yes
1979	354	97%	Yes
1980	359	98%	Yes
1981	362	99%	Yes
1982	357	98%	Yes
1983	360	99%	Yes
1984	362	99%	Yes
1985	362	99%	Yes
1986	362	99%	Yes
1987	362	99%	Yes
1988	359	98%	Yes
1989	359	98%	Yes
1990	361	99%	Yes
1991	361	99%	Yes
1992	360	98%	Yes
1993	358	98%	Yes
1994	355	97%	Yes
1995	342	94%	Yes
1996	313	86%	No
1997	327	90%	No
1998	353	97%	Yes
1999	345	95%	Yes
2000	316	86%	No
2001	363	99%	Yes
2002	365	100%	Yes
2003	364	100%	Yes
2004	366	100%	Yes
2005	365	100%	Yes
2006	365	100%	Yes
2007	363	99%	Yes
2008	365	100%	Yes
2009	365	100%	Yes
2010	365	100%	Yes
2011	365	100%	Yes
2012	366	100%	Yes
2013	365	100%	Yes
2014	365	100%	Yes
2015	365	100%	Yes
2016	366	100%	Yes
2017	335	92%	Yes
2018	365	100%	Yes
2019	365	100%	Yes
2020	366	100%	Yes
2021	365	100%	Yes
2022	365	100%	Yes
2023	365	100%	Yes
2024	366	100%	Yes
2025	365	100%	Yes
2026	286	78%	No

Latest Records

Latest records at Cass Lake
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
11 October 2026	Cass Lake, US	daily high max (Provisional)	31.1 C (88.0 F)	2.8 C (5.0 F)	1 year	14 of 100 (Routine)
26 September 2026	Cass Lake, US	daily high min (Tie, Provisional)	14.4 C (57.9 F)	tie	12 years	3 of 100 (Routine)
8 September 2026	Cass Lake, US	daily high min (Provisional)	19.4 C (66.9 F)	0.5 C (0.9 F)	24 years	17 of 100 (Routine)
15 August 2026	Cass Lake, US	daily rain	29.2 mm (1.1 in)	0.5 mm (0.02 in)	5 years	11 of 100 (Routine)
27 July 2026	Cass Lake, US	daily high min	21.7 C (71.1 F)	1.1 C (2.0 F)	67 years	32 of 100 (Routine)
20 July 2026	Cass Lake, US	daily high min (Tie)	22.2 C (72.0 F)	tie	24 years	4 of 100 (Routine)
14 July 2026	Cass Lake, US	daily high max (Tie)	35.0 C (95.0 F)	tie	72 years	7 of 100 (Routine)
13 July 2026	Cass Lake, US	daily high max	35.0 C (95.0 F)	0.6 C (1.1 F)	56 years	28 of 100 (Routine)
13 July 2026	Cass Lake, US	daily high min	23.9 C (75.0 F)	2.8 C (5.0 F)	12 years	19 of 100 (Routine)
12 July 2026	Cass Lake, US	daily high min	22.8 C (73.0 F)	1.1 C (2.0 F)	11 years	15 of 100 (Routine)
11 July 2026	Cass Lake, US	daily high min (Tie)	19.4 C (66.9 F)	tie	68 years	7 of 100 (Routine)
4 July 2026	Cass Lake, US	daily rain	41.7 mm (1.6 in)	15.8 mm (0.6 in)	32 years	30 of 100 (Routine)
9 June 2026	Cass Lake, US	daily high min (Tie)	20.0 C (68.0 F)	tie	67 years	7 of 100 (Routine)
30 May 2026	Cass Lake, US	daily high min (Tie)	18.3 C (64.9 F)	tie	37 years	5 of 100 (Routine)
27 May 2026	Cass Lake, US	daily high max	31.7 C (89.1 F)	0.6 C (1.1 F)	8 years	12 of 100 (Routine)
26 May 2026	Cass Lake, US	daily high max (Tie)	32.2 C (90.0 F)	tie	8 years	3 of 100 (Routine)
20 May 2026	Cass Lake, US	daily low max (Tie)	7.2 C (45.0 F)	tie	55 years	6 of 100 (Routine)
7 May 2026	Cass Lake, US	daily low max (Tie)	5.0 C (41.0 F)	tie	47 years	6 of 100 (Routine)
16 February 2026	Cass Lake, US	daily high max	10.0 C (50.0 F)	1.7 C (3.1 F)	44 years	25 of 100 (Routine)
14 February 2026	Cass Lake, US	daily high max (Tie)	10.0 C (50.0 F)	tie	15 years	3 of 100 (Routine)

Climate Trend

63 complete years, 1957 to 2025

One stripe for each of 63 complete years at Cass Lake, 1957 to 2025. Blue stripes are years cooler than the station's own mean of 3.9 C (39.1 F); red stripes are warmer. The coolest year was 1979, at 1.8 C (35.2 F), and the warmest was 2024, at 6.6 C (43.9 F). The strongest colour marks a difference of 2.7 C (4.9 F).

Annual mean temperature at Cass Lake as warming stripes, 1957 to 2025
Year	Annual mean temperature	Difference from the station mean
1957	3.0 C	-0.91 C
1958	3.7 C	-0.28 C
1959	3.1 C	-0.88 C
1960	3.2 C	-0.70 C
1961	4.1 C	+0.14 C
1962	3.4 C	-0.50 C
1963	4.0 C	+0.09 C
1964	3.3 C	-0.67 C
1965	1.9 C	-2.05 C
1966	2.2 C	-1.71 C
1967	2.3 C	-1.66 C
1968	3.3 C	-0.61 C
1969	3.2 C	-0.76 C
1970	2.5 C	-1.42 C
1971	2.9 C	-1.07 C
1972	2.0 C	-1.94 C
1973	4.3 C	+0.35 C
1974	3.1 C	-0.79 C
1975	3.0 C	-0.92 C
1977	3.9 C	-0.03 C
1978	2.7 C	-1.24 C
1979	1.8 C	-2.14 C
1980	3.0 C	-0.95 C
1981	4.4 C	+0.44 C
1982	2.0 C	-1.94 C
1983	4.0 C	+0.07 C
1984	3.7 C	-0.27 C
1985	2.2 C	-1.78 C
1986	4.3 C	+0.34 C
1987	6.3 C	+2.36 C
1988	4.2 C	+0.22 C
1989	2.6 C	-1.37 C
1990	4.3 C	+0.38 C
1991	4.2 C	+0.24 C
1992	3.8 C	-0.16 C
1993	2.6 C	-1.29 C
1994	3.8 C	-0.13 C
1998	6.0 C	+2.04 C
1999	5.2 C	+1.29 C
2001	5.4 C	+1.51 C
2002	4.4 C	+0.43 C
2003	4.2 C	+0.24 C
2004	3.8 C	-0.18 C
2005	5.3 C	+1.40 C
2006	6.2 C	+2.29 C
2007	4.9 C	+0.94 C
2008	3.0 C	-0.91 C
2009	3.5 C	-0.39 C
2010	5.4 C	+1.48 C
2011	4.9 C	+0.98 C
2012	6.4 C	+2.50 C
2013	3.2 C	-0.74 C
2014	2.9 C	-1.03 C
2015	5.8 C	+1.87 C
2016	6.1 C	+2.20 C
2018	4.0 C	+0.11 C
2019	3.2 C	-0.78 C
2020	4.8 C	+0.82 C
2021	6.1 C	+2.18 C
2022	3.5 C	-0.48 C
2023	6.1 C	+2.19 C
2024	6.6 C	+2.69 C
2025	5.0 C	+1.03 C

The annual mean temperature here has risen by 0.4 C (0.2 to 0.5) per decade over 1957 to 2025. In Fahrenheit: 0.7 F (0.4 to 0.9) 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 Cass Lake
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.4 C (0.2 to 0.5) per decade	0.7 F (0.4 to 0.9) per decade	1957 to 2025	63	Rise
Mean daily maximum	0.15 C (0.03 to 0.28) per decade	0.28 F (0.05 to 0.50) per decade	1957 to 2025	63	Rise
Mean daily minimum	0.6 C (0.4 to 0.7) per decade	1.0 F (0.8 to 1.3) per decade	1957 to 2025	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

1906 to 2026

Yearly extremes at Cass Lake: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	40.0 C (104.0 F)	1988	33.9 C (93.0 F)	79
Coldest night (TNn)	-44.4 C (-47.9 F)	1996	-37.8 C (-36.0 F)	79
Wettest day (Rx1day)	153.9 mm (6.1 in)	1975	50.8 mm (2.0 in)	85
Wettest five days (Rx5day)	178.3 mm (7.0 in)	1975	72.9 mm (2.9 in)	85
Longest dry spell (CDD)	45 days	1999	24 days	85

Hottest day (TXx)

The hottest day of the year at Cass Lake, 1906 to 2026. The record is 40.0 C (104.0 F) in 1988, marked on the chart; the median year is 33.9 C (93.0 F).

Hottest day (TXx) at Cass Lake by year
Year	Hottest day (TXx)
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	8.9 C (48.0 F)
1948	n/a
1949	33.3 C (91.9 F)
1950	33.3 C (91.9 F)
1951	33.3 C (91.9 F)
1952	33.3 C (91.9 F)
1953	33.3 C (91.9 F)
1954	35.0 C (95.0 F)
1955	34.4 C (93.9 F)
1956	34.4 C (93.9 F)
1957	35.0 C (95.0 F)
1958	37.2 C (99.0 F)
1959	34.4 C (93.9 F)
1960	33.9 C (93.0 F)
1961	35.0 C (95.0 F)
1962	31.7 C (89.1 F)
1963	33.3 C (91.9 F)
1964	36.1 C (97.0 F)
1965	33.3 C (91.9 F)
1966	33.9 C (93.0 F)
1967	33.9 C (93.0 F)
1968	33.3 C (91.9 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	31.7 C (89.1 F)
1974	35.6 C (96.1 F)
1975	37.8 C (100.0 F)
1976	38.3 C (100.9 F)
1977	37.2 C (99.0 F)
1978	34.4 C (93.9 F)
1979	32.8 C (91.0 F)
1980	37.8 C (100.0 F)
1981	33.9 C (93.0 F)
1982	34.4 C (93.9 F)
1983	38.3 C (100.9 F)
1984	36.7 C (98.1 F)
1985	32.8 C (91.0 F)
1986	33.3 C (91.9 F)
1987	36.7 C (98.1 F)
1988	40.0 C (104.0 F)
1989	37.8 C (100.0 F)
1990	36.1 C (97.0 F)
1991	33.9 C (93.0 F)
1992	31.1 C (88.0 F)
1993	32.2 C (90.0 F)
1994	33.9 C (93.0 F)
1995	36.7 C (98.1 F)
1996	32.8 C (91.0 F)
1997	32.2 C (90.0 F)
1998	32.8 C (91.0 F)
1999	32.2 C (90.0 F)
2000	33.3 C (91.9 F)
2001	35.6 C (96.1 F)
2002	33.9 C (93.0 F)
2003	36.1 C (97.0 F)
2004	31.7 C (89.1 F)
2005	35.0 C (95.0 F)
2006	36.1 C (97.0 F)
2007	35.6 C (96.1 F)
2008	32.2 C (90.0 F)
2009	33.3 C (91.9 F)
2010	33.9 C (93.0 F)
2011	33.3 C (91.9 F)
2012	36.1 C (97.0 F)
2013	35.0 C (95.0 F)
2014	32.8 C (91.0 F)
2015	34.4 C (93.9 F)
2016	32.8 C (91.0 F)
2017	32.2 C (90.0 F)
2018	32.8 C (91.0 F)
2019	32.8 C (91.0 F)
2020	33.9 C (93.0 F)
2021	37.8 C (100.0 F)
2022	36.1 C (97.0 F)
2023	34.4 C (93.9 F)
2024	32.8 C (91.0 F)
2025	35.6 C (96.1 F)
2026	35.0 C (95.0 F)

Coldest night (TNn)

The coldest night of the year at Cass Lake, 1906 to 2026. The record is -44.4 C (-47.9 F) in 1996, marked on the chart; the median year is -37.8 C (-36.0 F).

Coldest night (TNn) at Cass Lake by year
Year	Coldest night (TNn)
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	-2.8 C (27.0 F)
1948	n/a
1949	-36.1 C (-33.0 F)
1950	-35.6 C (-32.1 F)
1951	-42.8 C (-45.0 F)
1952	-36.7 C (-34.1 F)
1953	-37.8 C (-36.0 F)
1954	-43.9 C (-47.0 F)
1955	-42.2 C (-44.0 F)
1956	-35.0 C (-31.0 F)
1957	-37.2 C (-35.0 F)
1958	-37.2 C (-35.0 F)
1959	-40.0 C (-40.0 F)
1960	-33.3 C (-27.9 F)
1961	-38.9 C (-38.0 F)
1962	-40.0 C (-40.0 F)
1963	-39.4 C (-38.9 F)
1964	-36.1 C (-33.0 F)
1965	-42.2 C (-44.0 F)
1966	-42.8 C (-45.0 F)
1967	-42.2 C (-44.0 F)
1968	-42.8 C (-45.0 F)
1969	-36.7 C (-34.1 F)
1970	-40.0 C (-40.0 F)
1971	-38.9 C (-38.0 F)
1972	-42.8 C (-45.0 F)
1973	-40.0 C (-40.0 F)
1974	-40.6 C (-41.1 F)
1975	-36.7 C (-34.1 F)
1976	-40.0 C (-40.0 F)
1977	-42.2 C (-44.0 F)
1978	-38.3 C (-36.9 F)
1979	-42.2 C (-44.0 F)
1980	-37.8 C (-36.0 F)
1981	-40.6 C (-41.1 F)
1982	-42.2 C (-44.0 F)
1983	-43.3 C (-45.9 F)
1984	-40.6 C (-41.1 F)
1985	-40.6 C (-41.1 F)
1986	-37.8 C (-36.0 F)
1987	-40.6 C (-41.1 F)
1988	-42.2 C (-44.0 F)
1989	-40.0 C (-40.0 F)
1990	-40.0 C (-40.0 F)
1991	-35.6 C (-32.1 F)
1992	-37.8 C (-36.0 F)
1993	-38.9 C (-38.0 F)
1994	-41.7 C (-43.1 F)
1995	-34.4 C (-29.9 F)
1996	-44.4 C (-47.9 F)
1997	-40.6 C (-41.1 F)
1998	-35.0 C (-31.0 F)
1999	-36.1 C (-33.0 F)
2000	-32.8 C (-27.0 F)
2001	-32.8 C (-27.0 F)
2002	-27.2 C (-17.0 F)
2003	-32.8 C (-27.0 F)
2004	-37.2 C (-35.0 F)
2005	-40.6 C (-41.1 F)
2006	-31.1 C (-24.0 F)
2007	-36.1 C (-33.0 F)
2008	-34.4 C (-29.9 F)
2009	-37.2 C (-35.0 F)
2010	-36.1 C (-33.0 F)
2011	-37.8 C (-36.0 F)
2012	-30.6 C (-23.1 F)
2013	-35.0 C (-31.0 F)
2014	-37.8 C (-36.0 F)
2015	-35.0 C (-31.0 F)
2016	-34.4 C (-29.9 F)
2017	-37.2 C (-35.0 F)
2018	-37.2 C (-35.0 F)
2019	-42.2 C (-44.0 F)
2020	-33.9 C (-29.0 F)
2021	-40.6 C (-41.1 F)
2022	-37.8 C (-36.0 F)
2023	-34.4 C (-29.9 F)
2024	-32.2 C (-26.0 F)
2025	-34.4 C (-29.9 F)
2026	-35.6 C (-32.1 F)

Wettest day (Rx1day)

The wettest day of the year at Cass Lake, 1906 to 2026. The record is 153.9 mm (6.1 in) in 1975, marked on the chart; the median year is 50.8 mm (2.0 in).

Wettest day (Rx1day) at Cass Lake by year
Year	Wettest day (Rx1day)
1906	50.8 mm (2.0 in)
1907	33.0 mm (1.3 in)
1908	49.0 mm (1.9 in)
1909	58.2 mm (2.3 in)
1910	41.9 mm (1.6 in)
1911	11.4 mm (0.4 in)
1948	40.6 mm (1.6 in)
1949	84.6 mm (3.3 in)
1950	103.4 mm (4.1 in)
1951	39.4 mm (1.6 in)
1952	50.8 mm (2.0 in)
1953	59.7 mm (2.4 in)
1954	128.8 mm (5.1 in)
1955	20.8 mm (0.8 in)
1956	30.5 mm (1.2 in)
1957	67.8 mm (2.7 in)
1958	27.9 mm (1.1 in)
1959	72.4 mm (2.9 in)
1960	28.2 mm (1.1 in)
1961	62.0 mm (2.4 in)
1962	79.5 mm (3.1 in)
1963	32.8 mm (1.3 in)
1964	41.9 mm (1.6 in)
1965	65.0 mm (2.6 in)
1966	49.3 mm (1.9 in)
1967	31.2 mm (1.2 in)
1968	53.3 mm (2.1 in)
1969	68.1 mm (2.7 in)
1970	35.8 mm (1.4 in)
1971	39.9 mm (1.6 in)
1972	47.5 mm (1.9 in)
1973	53.3 mm (2.1 in)
1974	102.9 mm (4.1 in)
1975	153.9 mm (6.1 in)
1976	48.8 mm (1.9 in)
1977	44.7 mm (1.8 in)
1978	92.2 mm (3.6 in)
1979	65.8 mm (2.6 in)
1980	36.3 mm (1.4 in)
1981	47.2 mm (1.9 in)
1982	38.6 mm (1.5 in)
1983	70.1 mm (2.8 in)
1984	64.8 mm (2.6 in)
1985	48.3 mm (1.9 in)
1986	76.2 mm (3.0 in)
1987	80.0 mm (3.1 in)
1988	54.6 mm (2.1 in)
1989	60.2 mm (2.4 in)
1990	70.1 mm (2.8 in)
1991	35.8 mm (1.4 in)
1992	75.9 mm (3.0 in)
1993	65.3 mm (2.6 in)
1994	54.4 mm (2.1 in)
1995	88.4 mm (3.5 in)
1996	42.4 mm (1.7 in)
1997	86.9 mm (3.4 in)
1998	33.0 mm (1.3 in)
1999	65.5 mm (2.6 in)
2000	50.8 mm (2.0 in)
2001	42.2 mm (1.7 in)
2002	94.5 mm (3.7 in)
2003	43.4 mm (1.7 in)
2004	70.9 mm (2.8 in)
2005	53.6 mm (2.1 in)
2006	35.1 mm (1.4 in)
2007	57.4 mm (2.3 in)
2008	41.4 mm (1.6 in)
2009	36.3 mm (1.4 in)
2010	57.4 mm (2.3 in)
2011	53.6 mm (2.1 in)
2012	49.0 mm (1.9 in)
2013	35.6 mm (1.4 in)
2014	75.4 mm (3.0 in)
2015	44.5 mm (1.8 in)
2016	49.8 mm (2.0 in)
2017	42.2 mm (1.7 in)
2018	40.6 mm (1.6 in)
2019	64.3 mm (2.5 in)
2020	51.8 mm (2.0 in)
2021	46.2 mm (1.8 in)
2022	45.7 mm (1.8 in)
2023	62.5 mm (2.5 in)
2024	61.0 mm (2.4 in)
2025	40.4 mm (1.6 in)
2026	44.2 mm (1.7 in)

Wettest five days (Rx5day)

The wettest five days of the year at Cass Lake, 1906 to 2026. The record is 178.3 mm (7.0 in) in 1975, marked on the chart; the median year is 72.9 mm (2.9 in).

Wettest five days (Rx5day) at Cass Lake by year
Year	Wettest five days (Rx5day)
1906	77.2 mm (3.0 in)
1907	57.7 mm (2.3 in)
1908	59.9 mm (2.4 in)
1909	113.1 mm (4.5 in)
1910	46.9 mm (1.8 in)
1911	16.5 mm (0.6 in)
1948	42.4 mm (1.7 in)
1949	174.1 mm (6.9 in)
1950	104.9 mm (4.1 in)
1951	50.3 mm (2.0 in)
1952	93.5 mm (3.7 in)
1953	74.2 mm (2.9 in)
1954	143.0 mm (5.6 in)
1955	51.5 mm (2.0 in)
1956	53.0 mm (2.1 in)
1957	105.9 mm (4.2 in)
1958	49.1 mm (1.9 in)
1959	80.5 mm (3.2 in)
1960	35.1 mm (1.4 in)
1961	105.4 mm (4.1 in)
1962	108.2 mm (4.3 in)
1963	43.7 mm (1.7 in)
1964	61.5 mm (2.4 in)
1965	68.4 mm (2.7 in)
1966	89.5 mm (3.5 in)
1967	55.4 mm (2.2 in)
1968	77.4 mm (3.0 in)
1969	84.4 mm (3.3 in)
1970	56.4 mm (2.2 in)
1971	70.3 mm (2.8 in)
1972	67.1 mm (2.6 in)
1973	98.2 mm (3.9 in)
1974	121.2 mm (4.8 in)
1975	178.3 mm (7.0 in)
1976	75.5 mm (3.0 in)
1977	54.1 mm (2.1 in)
1978	99.8 mm (3.9 in)
1979	98.4 mm (3.9 in)
1980	50.5 mm (2.0 in)
1981	58.2 mm (2.3 in)
1982	91.4 mm (3.6 in)
1983	96.0 mm (3.8 in)
1984	132.9 mm (5.2 in)
1985	92.7 mm (3.6 in)
1986	97.8 mm (3.9 in)
1987	130.0 mm (5.1 in)
1988	80.0 mm (3.1 in)
1989	68.3 mm (2.7 in)
1990	72.9 mm (2.9 in)
1991	73.1 mm (2.9 in)
1992	94.0 mm (3.7 in)
1993	69.8 mm (2.7 in)
1994	111.3 mm (4.4 in)
1995	112.5 mm (4.4 in)
1996	52.1 mm (2.1 in)
1997	99.4 mm (3.9 in)
1998	69.6 mm (2.7 in)
1999	110.0 mm (4.3 in)
2000	72.2 mm (2.8 in)
2001	61.7 mm (2.4 in)
2002	128.3 mm (5.1 in)
2003	55.7 mm (2.2 in)
2004	41.9 mm (1.6 in)
2005	60.2 mm (2.4 in)
2006	55.4 mm (2.2 in)
2007	74.2 mm (2.9 in)
2008	82.3 mm (3.2 in)
2009	70.6 mm (2.8 in)
2010	75.7 mm (3.0 in)
2011	53.9 mm (2.1 in)
2012	67.6 mm (2.7 in)
2013	68.1 mm (2.7 in)
2014	127.5 mm (5.0 in)
2015	104.9 mm (4.1 in)
2016	65.5 mm (2.6 in)
2017	47.3 mm (1.9 in)
2018	80.3 mm (3.2 in)
2019	65.8 mm (2.6 in)
2020	71.9 mm (2.8 in)
2021	64.3 mm (2.5 in)
2022	85.8 mm (3.4 in)
2023	64.0 mm (2.5 in)
2024	91.9 mm (3.6 in)
2025	68.6 mm (2.7 in)
2026	67.9 mm (2.7 in)

Longest dry spell (CDD)

The longest dry spell of the year at Cass Lake, 1906 to 2026. The record is 45 days in 1999, marked on the chart; the median year is 24 days.

Longest dry spell (CDD) at Cass Lake by year
Year	Longest dry spell (CDD)
1906	17 days
1907	42 days
1908	26 days
1909	23 days
1910	30 days
1911	31 days
1948	15 days
1949	22 days
1950	27 days
1951	14 days
1952	28 days
1953	24 days
1954	21 days
1955	19 days
1956	32 days
1957	21 days
1958	30 days
1959	32 days
1960	28 days
1961	28 days
1962	21 days
1963	22 days
1964	29 days
1965	22 days
1966	27 days
1967	21 days
1968	35 days
1969	24 days
1970	21 days
1971	15 days
1972	23 days
1973	38 days
1974	26 days
1975	19 days
1976	36 days
1977	15 days
1978	21 days
1979	20 days
1980	26 days
1981	36 days
1982	23 days
1983	20 days
1984	28 days
1985	14 days
1986	19 days
1987	22 days
1988	36 days
1989	25 days
1990	24 days
1991	16 days
1992	25 days
1993	26 days
1994	22 days
1995	24 days
1996	17 days
1997	26 days
1998	33 days
1999	45 days
2000	27 days
2001	24 days
2002	26 days
2003	21 days
2004	17 days
2005	18 days
2006	22 days
2007	27 days
2008	35 days
2009	18 days
2010	24 days
2011	19 days
2012	20 days
2013	18 days
2014	31 days
2015	19 days
2016	21 days
2017	19 days
2018	22 days
2019	21 days
2020	33 days
2021	45 days
2022	18 days
2023	25 days
2024	27 days
2025	34 days
2026	21 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 Cass Lake falls on 23 May and the median first autumn frost on 19 September, which leaves a median of 118 days between them.

In 1991 to 2025 the median growing season was 131 days. That is 26 days more than in 1957 to 1987.

Fitted over all years, the growing season changes by +6.2 days per decade at this station.

Frost dates and growing season at Cass Lake
Measure	Median, all years	Earliest period (1957 to 1987)	Recent period (1991 to 2025)	Recent against earliest	Fitted trend
Last spring frost	23 May	29 May	18 May	11 days earlier	-2.6 days per decade
First autumn frost	19 September	16 September	28 September	12 days later	+3.5 days per decade
Growing days	118 days	105 days	131 days	26 days more	+6.2 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

72 years, 1909 to 2025

A day with at least 52.5 mm (2.1 in) of rain is expected about once in 2 years. A day with at least 137.1 mm (5.4 in) of rain is expected about once in 100 years.

Rainfall return levels at Cass 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	52.5 mm (2.1 in)
5 years	72.1 mm (2.8 in)
10 years	86.3 mm (3.4 in)
25 years	105.5 mm (4.2 in)
50 years	120.9 mm (4.8 in)
100 years	137.1 mm (5.4 in)	Longer than the 72 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, 72 years of values from 1909 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: 153.9 mm (6.1 in) in 1975; 128.8 mm (5.1 in) in 1954; 103.4 mm (4.1 in) in 1950.

Station Changes

1 suspected

One change was suspected in the annual mean temperature of Cass Lake, at 1994. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1994 ran 0.2 C (0.4 F) higher than in the years before (likely change).

Suspected changes in the annual mean temperature at Cass Lake, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1994	+0.2	+0.4	likely	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Climate Twins

2010 to 2025 against 1961 to 1990

Over 2010 to 2025, Cass Lake had a mean temperature of 4.9 C (40.9 F) and 661.3 mm (26.0 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Morris W Cntrl Rsch & Outreach (United States, 222 km away), Gull Lake Dam (United States, 110 km away) and Milaca (United States, 195 km away).

Climate twins of Cass Lake: stations whose 1961 to 1990 climate is closest to its 2010 to 2025 climate
Twin station	Country	Distance away	Mean temperature, 1961-1990	Rain a year, 1961-1990	Climate difference
Morris W Cntrl Rsch & Outreach	United States	222 km (138 mi)	5.2 C (41.4 F)	637.0 mm (25.1 in)	0.95
Gull Lake Dam	United States	110 km (68 mi)	5.2 C (41.3 F)	672.0 mm (26.5 in)	0.99
Milaca	United States	195 km (121 mi)	5.3 C (41.5 F)	733.2 mm (28.9 in)	1.00

Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.

Download the Data

Data for Cass Lake standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Cass 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

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