Swan River Threshold Days by Year (CA005042800)

16 fixed thresholds counted per year at Swan River (CA005042800): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Swan River Thresholds

Swan River: days with a maximum temperature at or above 30 C (86 F) in 26 years, most in 1961 with 36.
Swan River: days with a maximum temperature at or above 90 F (32.2 C) in 26 years, most in 1961 with 15.
Swan River: days with a maximum temperature at or below 0 C (32 F) in 26 years, most in 1972 with 149.
Swan River: nights with a minimum temperature at or below 0 C (32 F) in 26 years, most in 1961 with 223.
16 fixed thresholds have at least one qualifying day at Swan River.

Days at or above 30 C (86 F)

26 years with a qualifying day

Days per year at Swan River with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 36 in 1961.

Days at or above 30 C (86 F) per year at Swan River
Year	Days	Decade average
1909	14	14
1910	14	9
1911	4	9
1960	17	14.2
1961	36	14.2
1962	6	14.2
1963	10	14.2
1964	11	14.2
1966	19	14.2
1967	16	14.2
1968	5	14.2
1969	8	14.2
1970	17	10.1
1971	4	10.1
1972	8	10.1
1973	7	10.1
1974	8	10.1
1975	13	10.1
1976	8	10.1
1977	5	10.1
1978	14	10.1
1979	17	10.1
1980	19	14
1981	14	14
1982	3	14
1983	20	14

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

First to last qualifying date each year at Swan River
Year	First date	Last date
1909	1909-06-11	1909-09-26
1910	1910-06-11	1910-10-09
1911	1911-05-05	1911-07-26
1960	1960-05-12	1960-08-19
1961	1961-05-20	1961-09-17
1962	1962-06-11	1962-08-21
1963	1963-07-05	1963-09-07
1964	1964-05-17	1964-09-17
1966	1966-05-21	1966-09-07
1967	1967-06-27	1967-09-06
1968	1968-07-06	1968-09-12
1969	1969-07-11	1969-09-13
1970	1970-05-17	1970-08-13
1971	1971-08-05	1971-08-26
1972	1972-06-01	1972-08-29
1973	1973-06-23	1973-08-18
1974	1974-06-24	1974-08-07
1975	1975-06-24	1975-07-29
1976	1976-07-06	1976-09-06
1977	1977-05-11	1977-06-25
1978	1978-05-15	1978-09-03
1979	1979-06-12	1979-09-16
1980	1980-05-03	1980-07-29
1981	1981-05-21	1981-08-28
1982	1982-05-03	1982-09-10
1983	1983-06-10	1983-09-01

Every Fixed Threshold

Fixed thresholds at Swan River
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	26	36	1961	20
35 C (95 F): Days	12	4	1961	1
90 F (32.2 C): Days	26	15	1961	6
100 F (37.8 C): Days	3	1	1961	1
0 C (32 F): Ice days (max	26	149	1972	133
0 C (32 F): Frost days (min	26	223	1961	209
-10 C (14 F): Days with min	26	142	1909	119
-20 C (-4 F): Days with min	26	90	1966	57
-30 C (-22 F): Days with min	26	41	1966	18
-40 C (-40 F): Days with min	8	14	1966	3
20 C (68 F): Tropical nights (min	5	2	1960	2
10 mm (0.39 in): Days with 10 mm or more rain	23	21	1975	15
25 mm (0.98 in): Days with 25 mm or more rain	22	4	1910	3
50 mm (1.97 in): Days with 50 mm or more rain	2	2	1982	2
10 cm (3.9 in): Days with 10 cm or more snowfall	22	7	1974	2
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1910	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1909.

Download the Data

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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Swan River Threshold Days by Year (CA005042800)

Key Facts for Swan River Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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