White Swan Rs Threshold Days by Year

16 fixed thresholds counted per year at White Swan Rs (USC00459191): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for White Swan Rs Thresholds

White Swan Rs: days with 10 mm (0.39 in) or more of precipitation in 33 years, most in 1968 with 10.
White Swan Rs: days with a maximum temperature at or above 30 C (86 F) in 28 years, most in 1958 with 78.
White Swan Rs: days with a maximum temperature at or above 35 C (95 F) in 28 years, most in 1958 with 37.
White Swan Rs: days with a maximum temperature at or above 90 F (32.2 C) in 28 years, most in 1958 with 66.
16 fixed thresholds have at least one qualifying day at White Swan Rs.

Days at or above 30 C (86 F)

28 years with a qualifying day

Days per year at White Swan Rs with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 78 in 1958.

Days at or above 30 C (86 F) per year at White Swan Rs
Year	Days	Decade average
1928	59	58.5
1929	58	58.5
1935	52	52.7
1937	54	52.7
1939	52	52.7
1940	56	55.5
1942	55	55.5
1943	54	55.5
1944	57	55.5
1950	62	57.8
1954	41	57.8
1956	66	57.8
1958	78	57.8
1959	42	57.8
1960	59	61.2
1961	73	61.2
1967	77	61.2
1968	43	61.2
1969	54	61.2
1970	59	48
1971	39	48
1972	44	48
1973	50	48
1974	63	48
1975	56	48
1976	29	48
1977	31	48
1979	61	48

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

First to last qualifying date each year at White Swan Rs
Year	First date	Last date
1928	1928-05-19	1928-09-23
1929	1929-05-19	1929-09-17
1935	1935-05-21	1935-10-02
1937	1937-05-03	1937-09-16
1939	1939-05-13	1939-09-22
1940	1940-05-22	1940-09-11
1942	1942-06-27	1942-09-27
1943	1943-05-24	1943-10-07
1944	1944-05-14	1944-09-25
1950	1950-05-12	1950-09-24
1954	1954-05-15	1954-09-26
1956	1956-05-16	1956-09-19
1958	1958-05-16	1958-10-05
1959	1959-05-13	1959-09-12
1960	1960-06-01	1960-09-14
1961	1961-05-20	1961-09-04
1967	1967-05-21	1967-09-30
1968	1968-05-18	1968-09-10
1969	1969-05-10	1969-09-13
1970	1970-05-16	1970-09-01
1971	1971-06-22	1971-08-31
1972	1972-05-29	1972-09-05
1973	1973-05-14	1973-09-12
1974	1974-06-11	1974-09-26
1975	1975-05-15	1975-09-16
1976	1976-05-09	1976-10-01
1977	1977-04-24	1977-09-14
1979	1979-05-22	1979-09-21

Every Fixed Threshold

Fixed thresholds at White Swan Rs
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	28	78	1958	61
35 C (95 F): Days	28	37	1958	10
40 C (104 F): Days	9	7	1928	1
90 F (32.2 C): Days	28	66	1958	34
100 F (37.8 C): Days	21	13	1971	4
110 F (43.3 C): Days	1	2	1928	2
0 C (32 F): Ice days (max	28	40	1929	33
0 C (32 F): Frost days (min	28	174	1929	106
-10 C (14 F): Days with min	27	45	1929	30
-20 C (-4 F): Days with min	13	13	1950	5
-30 C (-22 F): Days with min	1	3	1950	3
20 C (68 F): Tropical nights (min	14	3	1973	2
10 mm (0.39 in): Days with 10 mm or more rain	33	10	1968	9
25 mm (0.98 in): Days with 25 mm or more rain	12	1	1954	1
10 cm (3.9 in): Days with 10 cm or more snowfall	23	7	1956	3
25 cm (9.8 in): Days with 25 cm or more snowfall	5	3	1954	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1928.

Download the Data

Data for White Swan Rs 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

White Swan Rs Threshold Days by Year

Key Facts for White Swan Rs Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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