Rosedale Threshold Days by Year (USC00227582)

17 fixed thresholds counted per year at Rosedale (USC00227582): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rosedale Thresholds

Rosedale: nights with a minimum temperature at or below 0 C (32 F) in 61 years, most in 1912 with 93.
Rosedale: nights with a minimum temperature at or above 20 C (68 F) in 61 years, most in 1921 with 118.
Rosedale: days with 10 mm (0.39 in) or more of precipitation in 61 years, most in 1975 with 59.
Rosedale: days with 25 mm (0.98 in) or more of precipitation in 61 years, most in 1932 with 25.
17 fixed thresholds have at least one qualifying day at Rosedale.

Days at or above 30 C (86 F)

60 years with a qualifying day

Days per year at Rosedale with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 150 in 1927.

Days at or above 30 C (86 F) per year at Rosedale
Year	Days	Decade average
1896	113	111.5
1897	110	111.5
1908	136	123
1909	110	123
1910	124	117
1911	129	117
1912	111	117
1913	111	117
1914	119	117
1915	131	117
1916	120	117
1917	94	117
1918	117	117
1919	114	117
1920	120	129.4
1921	133	129.4
1922	112	129.4
1923	94	129.4
1925	149	129.4
1926	130	129.4
1927	150	129.4
1928	130	129.4
1929	147	129.4
1930	135	129
1931	141	129
1932	124	129
1934	129	129
1935	116	129
1949	126	126
1950	97	117.7
1951	117	117.7
1953	134	117.7
1954	136	117.7
1955	129	117.7
1956	125	117.7
1957	98	117.7
1958	105	117.7
1959	118	117.7
1960	109	105.7
1961	87	105.7
1962	120	105.7
1963	124	105.7
1964	110	105.7
1965	118	105.7
1966	96	105.7
1967	100	105.7
1968	95	105.7
1969	98	105.7
1970	108	103.4
1971	108	103.4
1972	126	103.4
1973	105	103.4
1974	82	103.4
1975	94	103.4
1976	87	103.4
1977	125	103.4
1978	105	103.4
1979	94	103.4
1980	119	109
1981	99	109

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

First to last qualifying date each year at Rosedale
Year	First date	Last date
1896	1896-04-17	1896-10-02
1897	1897-05-19	1897-10-16
1908	1908-03-17	1908-10-21
1909	1909-04-28	1909-10-08
1910	1910-03-23	1910-10-18
1911	1911-03-09	1911-10-15
1912	1912-03-19	1912-10-11
1913	1913-05-09	1913-10-09
1914	1914-04-16	1914-10-11
1915	1915-04-17	1915-10-28
1916	1916-03-31	1916-10-15
1917	1917-04-28	1917-10-17
1918	1918-02-25	1918-09-16
1919	1919-04-12	1919-10-26
1920	1920-04-17	1920-10-21
1921	1921-03-20	1921-10-25
1922	1922-04-07	1922-10-30
1923	1923-05-20	1923-10-13
1925	1925-03-23	1925-10-07
1926	1926-04-23	1926-10-19
1927	1927-03-19	1927-11-30
1928	1928-03-26	1928-10-15
1929	1929-03-23	1929-10-19
1930	1930-04-09	1930-10-16
1931	1931-04-15	1931-11-13
1932	1932-04-20	1932-10-23
1934	1934-04-03	1934-10-24
1935	1935-03-20	1935-10-22
1949	1949-04-24	1949-10-11
1950	1950-05-08	1950-10-30
1951	1951-05-01	1951-10-06
1953	1953-04-09	1953-10-22
1954	1954-03-24	1954-10-11
1955	1955-03-12	1955-11-14
1956	1956-04-28	1956-10-11
1957	1957-05-11	1957-09-21
1958	1958-05-14	1958-09-27
1959	1959-05-01	1959-10-11
1960	1960-04-07	1960-10-04
1961	1961-05-20	1961-10-13
1962	1962-05-08	1962-10-16
1963	1963-04-23	1963-10-24
1964	1964-05-18	1964-09-27
1965	1965-04-10	1965-10-10
1966	1966-04-01	1966-10-10
1967	1967-03-12	1967-10-16
1968	1968-05-24	1968-10-15
1969	1969-05-06	1969-10-13
1970	1970-05-01	1970-10-06
1971	1971-05-22	1971-10-29
1972	1972-04-13	1972-10-19
1973	1973-05-11	1973-10-12
1974	1974-05-10	1974-09-21
1975	1975-04-28	1975-10-16
1976	1976-05-13	1976-10-05
1977	1977-04-17	1977-10-02
1978	1978-05-21	1978-10-22
1979	1979-05-09	1979-10-22
1980	1980-04-23	1980-10-12
1981	1981-04-28	1981-10-05

Every Fixed Threshold

Fixed thresholds at Rosedale
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	60	150	1927	99
35 C (95 F): Days	60	82	1930	20
40 C (104 F): Days	5	13	1930	1
90 F (32.2 C): Days	60	122	1925	61
100 F (37.8 C): Days	30	53	1930	11
110 F (43.3 C): Days	1	1	1930	1
0 C (32 F): Ice days (max	47	14	1963	4
0 C (32 F): Frost days (min	61	93	1912	60
-10 C (14 F): Days with min	34	15	1963	5
-20 C (-4 F): Days with min	2	1	1918	1
20 C (68 F): Tropical nights (min	61	118	1921	81
25 C (77 F): Days with min	50	20	1951	9
10 mm (0.39 in): Days with 10 mm or more rain	61	59	1975	30
25 mm (0.98 in): Days with 25 mm or more rain	61	25	1932	11
50 mm (1.97 in): Days with 50 mm or more rain	58	11	1958	1
100 mm (3.94 in): Days with 100 mm or more rain	20	3	1958	1
10 cm (3.9 in): Days with 10 cm or more snowfall	7	1	1949	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1896.

Download the Data

Data for Rosedale 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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Rosedale Threshold Days by Year (USC00227582)

Key Facts for Rosedale Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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