Swan River Weather Records (CA005042800)

Record envelope, standing records and threshold days for Swan River (CA005042800), Manitoba, Canada, with 105 years of record.

Key Facts for Swan River

Swan River (CA005042800) is a weather station in Manitoba, Canada at 52.05 latitude and -101.22 longitude, 347 m (1,138 ft) above sea level.
The station reports from 1904 to 2008, 105 years of record.
1,464 records set at Swan River still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Swan River set a daily record low minimum temperature of -37.0 C (-34.6 F) on 23 December 1983.

About the Station

Location: Manitoba, Canada, 52.05 latitude, -101.22 longitude.
Elevation: 347 m (1,138 ft).
Period of record: 1904 to 2008, 105 years.
Eligible elements: tmax, tmin, prcp, snow.

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 Swan River. 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 Swan River, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	7.2 C (45.0 F)	-46.1 C (-51.0 F)	n/a	n/a
Feb	6.7 C (44.1 F)	-43.9 C (-47.0 F)	n/a	n/a
Mar	20.6 C (69.1 F)	-37.8 C (-36.0 F)	n/a	n/a
Apr	32.2 C (90.0 F)	-28.3 C (-18.9 F)	n/a	n/a
May	39.0 C (102.2 F)	-15.6 C (3.9 F)	n/a	n/a
Jun	38.9 C (102.0 F)	-5.0 C (23.0 F)	n/a	n/a
Jul	37.8 C (100.0 F)	0.0 C (32.0 F)	n/a	n/a
Aug	38.3 C (100.9 F)	-4.4 C (24.1 F)	n/a	n/a
Sep	37.8 C (100.0 F)	-12.2 C (10.0 F)	n/a	n/a
Oct	30.6 C (87.1 F)	-20.6 C (-5.1 F)	n/a	n/a
Nov	20.0 C (68.0 F)	-34.4 C (-29.9 F)	n/a	n/a
Dec	11.1 C (52.0 F)	-45.6 C (-50.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Swan River still stand. 1964 holds the most, with 65.

Standing records at Swan River by the year they were set
Year set	Standing records
1908	25
1909	52
1910	56
1911	61
1912	10
1915	39
1916	17
1917	19
1918	24
1919	30
1920	19
1921	17
1922	12
1923	9
1924	21
1925	14
1926	8
1933	1
1934	4
1937	10
1938	7
1939	9
1940	12
1944	13
1945	15
1946	23
1947	10
1948	11
1949	21
1950	13
1951	7
1952	11
1953	14
1954	9
1955	16
1956	10
1957	11
1958	7
1959	8
1960	21
1961	33
1962	40
1963	31
1964	65
1965	27
1966	46
1967	50
1968	30
1969	21
1970	22
1971	9
1972	26
1973	35
1974	31
1975	20
1976	24
1977	43
1978	25
1979	23
1980	35
1981	59
1982	22
1983	51

All-Time Record Progression

1 new records

1 all-time records were set at Swan River between 22 May 1980 and 22 May 1980. Each dot is a new record.

Wettest Day of Each Month

Sep: 85.1 mm (3.4 in)

The wettest day on record for each calendar month at Swan River. The most was 85.1 mm (3.4 in) on 11 September 1916.

Record daily precipitation for each month at Swan River
Month	Record daily precipitation (mm)	Date
Jan	17.8 mm (0.7 in)	21 January 1964
Feb	17.8 mm (0.7 in)	3 February 1962
Mar	30.5 mm (1.2 in)	30 March 1967
Apr	38.1 mm (1.5 in)	22 April 1915
May	38.6 mm (1.5 in)	28 May 1910
Jun	53.3 mm (2.1 in)	24 June 1953
Jul	73.7 mm (2.9 in)	17 July 1957
Aug	63.5 mm (2.5 in)	28 August 1956
Sep	85.1 mm (3.4 in)	11 September 1916
Oct	41.9 mm (1.6 in)	25 October 1970
Nov	20.3 mm (0.8 in)	13 November 1973
Dec	25.4 mm (1.0 in)	30 December 1910

Period of Record Coverage

1904 to 1983

64 years of record at Swan River, 1904 to 1983. 38 years have data for under 90 percent of days and are left out of rankings: 1904, 1908, 1912, 1915, 1916, 1917, 1918, 1919 and others.

Days with data per year at Swan River
Year	Days with data	Share of year	Complete
1904	14	4%	No
1908	241	66%	No
1909	365	100%	Yes
1910	364	100%	Yes
1911	365	100%	Yes
1912	91	25%	No
1915	214	59%	No
1916	182	50%	No
1917	183	50%	No
1918	184	50%	No
1919	183	50%	No
1920	150	41%	No
1921	180	49%	No
1922	182	50%	No
1923	181	50%	No
1924	182	50%	No
1925	179	49%	No
1926	153	42%	No
1933	29	8%	No
1934	31	8%	No
1937	139	38%	No
1938	214	59%	No
1939	180	49%	No
1940	153	42%	No
1944	244	67%	No
1945	209	57%	No
1946	214	59%	No
1947	214	59%	No
1948	213	58%	No
1949	214	59%	No
1950	214	59%	No
1951	214	59%	No
1952	214	58%	No
1953	214	59%	No
1954	214	59%	No
1955	214	59%	No
1956	214	58%	No
1957	214	59%	No
1958	214	59%	No
1959	214	59%	No
1960	335	92%	Yes
1961	363	99%	Yes
1962	362	99%	Yes
1963	344	94%	Yes
1964	340	93%	Yes
1965	297	81%	No
1966	365	100%	Yes
1967	365	100%	Yes
1968	365	100%	Yes
1969	365	100%	Yes
1970	365	100%	Yes
1971	365	100%	Yes
1972	366	100%	Yes
1973	365	100%	Yes
1974	365	100%	Yes
1975	365	100%	Yes
1976	366	100%	Yes
1977	365	100%	Yes
1978	365	100%	Yes
1979	365	100%	Yes
1980	364	99%	Yes
1981	362	99%	Yes
1982	363	99%	Yes
1983	364	100%	Yes

Latest Records

Latest records at Swan River
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
23 December 1983	Swan River, CA	daily low min	-37.0 C (-34.6 F)	5.3 C (9.5 F)	14 years	18 of 100 (Routine)
23 December 1983	Swan River, CA	daily low max	-26.0 C (-14.8 F)	2.1 C (3.8 F)	18 years	15 of 100 (Routine)
22 December 1983	Swan River, CA	daily low max	-28.0 C (-18.4 F)	4.7 C (8.5 F)	18 years	18 of 100 (Routine)
22 December 1983	Swan River, CA	daily low min	-34.0 C (-29.2 F)	2.3 C (4.1 F)	12 years	13 of 100 (Routine)
21 December 1983	Swan River, CA	daily low max	-26.0 C (-14.8 F)	1.6 C (2.9 F)	12 years	13 of 100 (Routine)
18 December 1983	Swan River, CA	daily low max	-27.5 C (-17.5 F)	2.5 C (4.5 F)	21 years	17 of 100 (Routine)
18 December 1983	Swan River, CA	daily low min	-33.0 C (-27.4 F)	0.8 C (1.4 F)	18 years	13 of 100 (Routine)
17 December 1983	Swan River, CA	daily low max	-26.0 C (-14.8 F)	2.7 C (4.9 F)	18 years	16 of 100 (Routine)
17 December 1983	Swan River, CA	daily low min	-36.5 C (-33.7 F)	4.8 C (8.6 F)	8 years	15 of 100 (Routine)
16 December 1983	Swan River, CA	daily low max	-24.0 C (-11.2 F)	2.3 C (4.1 F)	18 years	15 of 100 (Routine)
16 December 1983	Swan River, CA	daily low min	-33.0 C (-27.4 F)	1.9 C (3.4 F)	18 years	15 of 100 (Routine)
15 December 1983	Swan River, CA	daily low max	-25.0 C (-13.0 F)	1.0 C (1.8 F)	4 years	10 of 100 (Routine)
10 December 1983	Swan River, CA	daily rain	7.0 mm (0.28 in)	1.2 mm (0.05 in)	12 years	13 of 100 (Routine)
10 December 1983	Swan River, CA	daily snowfall	7.0 cm (2.8 in)	1.2 cm (0.5 in)	12 years	13 of 100 (Routine)
28 November 1983	Swan River, CA	daily rain	5.2 mm (0.20 in)	0.1 mm (0.00 in)	12 years	11 of 100 (Routine)
28 November 1983	Swan River, CA	daily snowfall	5.2 cm (2.0 in)	0.1 cm (0.0 in)	12 years	11 of 100 (Routine)
20 November 1983	Swan River, CA	daily rain	8.4 mm (0.33 in)	4.6 mm (0.18 in)	16 years	20 of 100 (Routine)
20 November 1983	Swan River, CA	daily snowfall	8.4 cm (3.3 in)	4.6 cm (1.8 in)	16 years	24 of 100 (Routine)
20 November 1983	Swan River, CA	daily high min	-2.5 C (27.5 F)	1.4 C (2.5 F)	22 years	15 of 100 (Routine)
19 November 1983	Swan River, CA	daily high min	0.0 C (32.0 F)	0.5 C (0.9 F)	4 years	9 of 100 (Routine)

Climate Trend

24 complete years, 1909 to 1983

One stripe for each of 24 complete years at Swan River, 1909 to 1983. Blue stripes are years cooler than the station's own mean of 1.0 C (33.9 F); red stripes are warmer. The coolest year was 1966, at -0.7 C (30.7 F), and the warmest was 1981, at 4.0 C (39.2 F). The strongest colour marks a difference of 3.0 C (5.4 F).

Annual mean temperature at Swan River as warming stripes, 1909 to 1983
Year	Annual mean temperature	Difference from the station mean
1909	0.0 C	-1.07 C
1910	1.9 C	+0.85 C
1911	0.2 C	-0.82 C
1961	1.8 C	+0.79 C
1962	1.1 C	+0.02 C
1964	0.6 C	-0.43 C
1966	-0.7 C	-1.76 C
1967	0.1 C	-0.96 C
1968	0.8 C	-0.21 C
1969	0.4 C	-0.63 C
1970	0.4 C	-0.62 C
1971	0.7 C	-0.37 C
1972	-0.3 C	-1.37 C
1973	1.8 C	+0.78 C
1974	0.8 C	-0.26 C
1975	1.2 C	+0.19 C
1976	2.2 C	+1.19 C
1977	2.3 C	+1.31 C
1978	1.0 C	-0.05 C
1979	0.3 C	-0.73 C
1980	2.0 C	+0.94 C
1981	4.0 C	+2.98 C
1982	0.6 C	-0.40 C
1983	1.7 C	+0.71 C

This station does not have enough complete years (30 are needed) to fit a temperature trend.

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

1904 to 1983

Yearly extremes at Swan River: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	39.0 C (102.2 F)	1980	34.4 C (93.9 F)	64
Coldest night (TNn)	-46.1 C (-51.0 F)	1911	-20.8 C (-5.5 F)	64
Wettest day (Rx1day)	85.1 mm (3.4 in)	1916	34.3 mm (1.4 in)	64
Wettest five days (Rx5day)	123.2 mm (4.9 in)	1916	56.2 mm (2.2 in)	64
Longest dry spell (CDD)	66 days	1976	24 days	64

Hottest day (TXx)

The hottest day of the year at Swan River, 1904 to 1983. The record is 39.0 C (102.2 F) in 1980, marked on the chart; the median year is 34.4 C (93.9 F).

Hottest day (TXx) at Swan River by year
Year	Hottest day (TXx)
1904	30.6 C (87.1 F)
1908	37.8 C (100.0 F)
1909	34.4 C (93.9 F)
1910	33.9 C (93.0 F)
1911	32.2 C (90.0 F)
1912	4.4 C (39.9 F)
1915	34.4 C (93.9 F)
1916	33.9 C (93.0 F)
1917	34.4 C (93.9 F)
1918	36.1 C (97.0 F)
1919	38.9 C (102.0 F)
1920	34.4 C (93.9 F)
1921	32.2 C (90.0 F)
1922	36.7 C (98.1 F)
1923	33.9 C (93.0 F)
1924	33.3 C (91.9 F)
1925	33.3 C (91.9 F)
1926	34.4 C (93.9 F)
1933	28.9 C (84.0 F)
1934	34.4 C (93.9 F)
1937	35.6 C (96.1 F)
1938	32.2 C (90.0 F)
1939	33.3 C (91.9 F)
1940	35.6 C (96.1 F)
1944	34.4 C (93.9 F)
1945	35.6 C (96.1 F)
1946	33.9 C (93.0 F)
1947	33.3 C (91.9 F)
1948	33.3 C (91.9 F)
1949	36.1 C (97.0 F)
1950	35.0 C (95.0 F)
1951	33.9 C (93.0 F)
1952	33.3 C (91.9 F)
1953	32.2 C (90.0 F)
1954	31.7 C (89.1 F)
1955	35.0 C (95.0 F)
1956	36.1 C (97.0 F)
1957	32.8 C (91.0 F)
1958	33.9 C (93.0 F)
1959	33.9 C (93.0 F)
1960	35.0 C (95.0 F)
1961	38.3 C (100.9 F)
1962	33.9 C (93.0 F)
1963	34.4 C (93.9 F)
1964	33.9 C (93.0 F)
1965	32.2 C (90.0 F)
1966	36.7 C (98.1 F)
1967	34.4 C (93.9 F)
1968	32.2 C (90.0 F)
1969	35.0 C (95.0 F)
1970	34.4 C (93.9 F)
1971	33.3 C (91.9 F)
1972	36.1 C (97.0 F)
1973	33.3 C (91.9 F)
1974	35.0 C (95.0 F)
1975	37.8 C (100.0 F)
1976	35.0 C (95.0 F)
1977	32.8 C (91.0 F)
1978	35.6 C (96.1 F)
1979	36.1 C (97.0 F)
1980	39.0 C (102.2 F)
1981	34.0 C (93.2 F)
1982	32.5 C (90.5 F)
1983	35.0 C (95.0 F)

Coldest night (TNn)

The coldest night of the year at Swan River, 1904 to 1983. The record is -46.1 C (-51.0 F) in 1911, marked on the chart; the median year is -20.8 C (-5.5 F).

Coldest night (TNn) at Swan River by year
Year	Coldest night (TNn)
1904	3.3 C (37.9 F)
1908	-38.9 C (-38.0 F)
1909	-44.4 C (-47.9 F)
1910	-41.1 C (-42.0 F)
1911	-46.1 C (-51.0 F)
1912	-43.9 C (-47.0 F)
1915	-16.7 C (1.9 F)
1916	-17.8 C (0.0 F)
1917	-17.2 C (1.0 F)
1918	-11.1 C (12.0 F)
1919	-20.6 C (-5.1 F)
1920	-6.7 C (19.9 F)
1921	-16.1 C (3.0 F)
1922	-11.7 C (10.9 F)
1923	-13.9 C (7.0 F)
1924	-8.9 C (16.0 F)
1925	-17.2 C (1.0 F)
1926	-16.7 C (1.9 F)
1933	-12.2 C (10.0 F)
1934	0.0 C (32.0 F)
1937	-2.2 C (28.0 F)
1938	-15.6 C (3.9 F)
1939	-15.6 C (3.9 F)
1940	-16.7 C (1.9 F)
1944	-26.1 C (-15.0 F)
1945	-16.7 C (1.9 F)
1946	-13.3 C (8.1 F)
1947	-13.3 C (8.1 F)
1948	-20.0 C (-4.0 F)
1949	-13.3 C (8.1 F)
1950	-21.1 C (-6.0 F)
1951	-13.3 C (8.1 F)
1952	-13.3 C (8.1 F)
1953	-19.4 C (-2.9 F)
1954	-27.2 C (-17.0 F)
1955	-7.8 C (18.0 F)
1956	-16.7 C (1.9 F)
1957	-19.4 C (-2.9 F)
1958	-14.4 C (6.1 F)
1959	-10.6 C (12.9 F)
1960	-32.8 C (-27.0 F)
1961	-38.3 C (-36.9 F)
1962	-38.9 C (-38.0 F)
1963	-37.2 C (-35.0 F)
1964	-36.1 C (-33.0 F)
1965	-34.4 C (-29.9 F)
1966	-43.9 C (-47.0 F)
1967	-41.7 C (-43.1 F)
1968	-40.6 C (-41.1 F)
1969	-40.6 C (-41.1 F)
1970	-36.7 C (-34.1 F)
1971	-39.4 C (-38.9 F)
1972	-41.1 C (-42.0 F)
1973	-37.8 C (-36.0 F)
1974	-38.9 C (-38.0 F)
1975	-34.4 C (-29.9 F)
1976	-34.4 C (-29.9 F)
1977	-37.2 C (-35.0 F)
1978	-36.1 C (-33.0 F)
1979	-36.7 C (-34.1 F)
1980	-38.0 C (-36.4 F)
1981	-34.0 C (-29.2 F)
1982	-39.0 C (-38.2 F)
1983	-37.0 C (-34.6 F)

Wettest day (Rx1day)

The wettest day of the year at Swan River, 1904 to 1983. The record is 85.1 mm (3.4 in) in 1916, marked on the chart; the median year is 34.3 mm (1.4 in).

Wettest day (Rx1day) at Swan River by year
Year	Wettest day (Rx1day)
1904	17.3 mm (0.7 in)
1908	22.4 mm (0.9 in)
1909	35.6 mm (1.4 in)
1910	40.1 mm (1.6 in)
1911	38.9 mm (1.5 in)
1912	5.1 mm (0.20 in)
1915	39.4 mm (1.6 in)
1916	85.1 mm (3.4 in)
1917	19.1 mm (0.8 in)
1918	40.6 mm (1.6 in)
1919	47.0 mm (1.9 in)
1920	34.3 mm (1.4 in)
1921	50.0 mm (2.0 in)
1922	57.9 mm (2.3 in)
1923	22.6 mm (0.9 in)
1924	30.0 mm (1.2 in)
1925	17.3 mm (0.7 in)
1926	12.7 mm (0.5 in)
1933	36.1 mm (1.4 in)
1934	14.2 mm (0.6 in)
1937	21.8 mm (0.9 in)
1938	58.4 mm (2.3 in)
1939	56.9 mm (2.2 in)
1940	22.9 mm (0.9 in)
1944	25.4 mm (1.0 in)
1945	26.9 mm (1.1 in)
1946	29.2 mm (1.1 in)
1947	44.7 mm (1.8 in)
1948	38.1 mm (1.5 in)
1949	31.5 mm (1.2 in)
1950	49.8 mm (2.0 in)
1951	29.5 mm (1.2 in)
1952	44.5 mm (1.8 in)
1953	53.3 mm (2.1 in)
1954	34.3 mm (1.4 in)
1955	23.4 mm (0.9 in)
1956	63.5 mm (2.5 in)
1957	73.7 mm (2.9 in)
1958	33.8 mm (1.3 in)
1959	28.4 mm (1.1 in)
1960	39.4 mm (1.6 in)
1961	15.2 mm (0.6 in)
1962	36.8 mm (1.4 in)
1963	38.1 mm (1.5 in)
1964	29.5 mm (1.2 in)
1965	33.3 mm (1.3 in)
1966	34.3 mm (1.4 in)
1967	30.5 mm (1.2 in)
1968	33.3 mm (1.3 in)
1969	32.3 mm (1.3 in)
1970	41.9 mm (1.6 in)
1971	42.4 mm (1.7 in)
1972	42.7 mm (1.7 in)
1973	30.0 mm (1.2 in)
1974	40.9 mm (1.6 in)
1975	28.2 mm (1.1 in)
1976	40.6 mm (1.6 in)
1977	30.5 mm (1.2 in)
1978	26.4 mm (1.0 in)
1979	31.5 mm (1.2 in)
1980	50.2 mm (2.0 in)
1981	33.5 mm (1.3 in)
1982	60.0 mm (2.4 in)
1983	45.0 mm (1.8 in)

Wettest five days (Rx5day)

The wettest five days of the year at Swan River, 1904 to 1983. The record is 123.2 mm (4.9 in) in 1916, marked on the chart; the median year is 56.2 mm (2.2 in).

Wettest five days (Rx5day) at Swan River by year
Year	Wettest five days (Rx5day)
1904	17.3 mm (0.7 in)
1908	48.3 mm (1.9 in)
1909	36.0 mm (1.4 in)
1910	62.0 mm (2.4 in)
1911	62.2 mm (2.4 in)
1912	5.1 mm (0.20 in)
1915	58.0 mm (2.3 in)
1916	123.2 mm (4.9 in)
1917	33.0 mm (1.3 in)
1918	58.4 mm (2.3 in)
1919	59.7 mm (2.4 in)
1920	59.7 mm (2.4 in)
1921	107.7 mm (4.2 in)
1922	57.9 mm (2.3 in)
1923	61.2 mm (2.4 in)
1924	51.8 mm (2.0 in)
1925	56.2 mm (2.2 in)
1926	23.7 mm (0.9 in)
1933	54.9 mm (2.2 in)
1934	18.2 mm (0.7 in)
1937	28.8 mm (1.1 in)
1938	64.0 mm (2.5 in)
1939	97.5 mm (3.8 in)
1940	34.6 mm (1.4 in)
1944	41.7 mm (1.6 in)
1945	61.7 mm (2.4 in)
1946	38.9 mm (1.5 in)
1947	72.0 mm (2.8 in)
1948	51.3 mm (2.0 in)
1949	63.5 mm (2.5 in)
1950	79.2 mm (3.1 in)
1951	52.9 mm (2.1 in)
1952	53.9 mm (2.1 in)
1953	89.4 mm (3.5 in)
1954	63.0 mm (2.5 in)
1955	35.1 mm (1.4 in)
1956	88.9 mm (3.5 in)
1957	84.1 mm (3.3 in)
1958	46.5 mm (1.8 in)
1959	56.1 mm (2.2 in)
1960	51.0 mm (2.0 in)
1961	29.0 mm (1.1 in)
1962	39.8 mm (1.6 in)
1963	57.6 mm (2.3 in)
1964	62.5 mm (2.5 in)
1965	67.3 mm (2.6 in)
1966	48.0 mm (1.9 in)
1967	46.0 mm (1.8 in)
1968	57.3 mm (2.3 in)
1969	49.8 mm (2.0 in)
1970	77.2 mm (3.0 in)
1971	56.4 mm (2.2 in)
1972	51.3 mm (2.0 in)
1973	42.1 mm (1.7 in)
1974	52.0 mm (2.0 in)
1975	55.2 mm (2.2 in)
1976	85.6 mm (3.4 in)
1977	62.0 mm (2.4 in)
1978	46.0 mm (1.8 in)
1979	36.3 mm (1.4 in)
1980	77.8 mm (3.1 in)
1981	50.8 mm (2.0 in)
1982	99.6 mm (3.9 in)
1983	57.8 mm (2.3 in)

Longest dry spell (CDD)

The longest dry spell of the year at Swan River, 1904 to 1983. The record is 66 days in 1976, marked on the chart; the median year is 24 days.

Longest dry spell (CDD) at Swan River by year
Year	Longest dry spell (CDD)
1904	17 days
1908	25 days
1909	21 days
1910	36 days
1911	25 days
1912	34 days
1915	29 days
1916	24 days
1917	28 days
1918	18 days
1919	29 days
1920	13 days
1921	27 days
1922	19 days
1923	34 days
1924	24 days
1925	34 days
1926	23 days
1933	13 days
1934	4 days
1937	19 days
1938	24 days
1939	18 days
1940	25 days
1944	29 days
1945	19 days
1946	17 days
1947	23 days
1948	23 days
1949	21 days
1950	24 days
1951	12 days
1952	22 days
1953	24 days
1954	28 days
1955	20 days
1956	19 days
1957	21 days
1958	13 days
1959	17 days
1960	23 days
1961	29 days
1962	19 days
1963	27 days
1964	30 days
1965	42 days
1966	36 days
1967	19 days
1968	28 days
1969	29 days
1970	18 days
1971	20 days
1972	29 days
1973	22 days
1974	29 days
1975	30 days
1976	66 days
1977	29 days
1978	40 days
1979	20 days
1980	64 days
1981	50 days
1982	24 days
1983	20 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

24 years with a frost

Across 24 years with a frost, the median last spring frost at Swan River falls on 24 May and the median first autumn frost on 13 September, which leaves a median of 108 days between them.

Frost dates and growing season at Swan River
Measure	Median, all years	Earliest period	Recent period (1909 to 1983)	Recent against earliest	Fitted trend
Last spring frost	24 May	n/a	24 May	n/a	n/a
First autumn frost	13 September	n/a	13 September	n/a	n/a
Growing days	108 days	n/a	108 days	n/a	n/a

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.

Download the Data

Data for Swan River standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Swan River 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).