Rock House Threshold Days by Year (USC00317363)

15 fixed thresholds counted per year at Rock House (USC00317363): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Rock House Thresholds

Rock House: nights with a minimum temperature at or below 0 C (32 F) in 56 years, most in 1915 with 107.
Rock House: days with 10 mm (0.39 in) or more of precipitation in 56 years, most in 1929 with 82.
Rock House: days with 25 mm (0.98 in) or more of precipitation in 56 years, most in 1913 with 37.
Rock House: days with 50 mm (1.97 in) or more of precipitation in 56 years, most in 1957 with 20.
15 fixed thresholds have at least one qualifying day at Rock House.

Days at or above 30 C (86 F)

46 years with a qualifying day

Days per year at Rock House with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 38 in 1954.

Days at or above 30 C (86 F) per year at Rock House
Year	Days	Decade average
1900	13	7.1
1901	2	7.1
1902	14	7.1
1903	8	7.1
1904	3	7.1
1907	9	7.1
1909	1	7.1
1911	3	3.4
1912	2	3.4
1913	2	3.4
1914	9	3.4
1915	2	3.4
1916	2	3.4
1918	6	3.4
1919	1	3.4
1921	1	12
1924	7	12
1925	35	12
1926	11	12
1927	6	12
1930	26	13.5
1931	14	13.5
1932	11	13.5
1933	13	13.5
1934	12	13.5
1935	9	13.5
1936	26	13.5
1937	10	13.5
1938	9	13.5
1939	5	13.5
1940	3	6.1
1941	7	6.1
1942	3	6.1
1943	12	6.1
1944	8	6.1
1947	7	6.1
1948	7	6.1
1949	2	6.1
1950	2	16.5
1951	20	16.5
1952	25	16.5
1953	15	16.5
1954	38	16.5
1955	2	16.5
1956	15	16.5
1957	15	16.5

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

First to last qualifying date each year at Rock House
Year	First date	Last date
1900	1900-08-08	1900-08-22
1901	1901-07-11	1901-07-12
1902	1902-06-12	1902-08-22
1903	1903-05-22	1903-08-28
1904	1904-07-19	1904-08-22
1907	1907-07-08	1907-08-30
1909	1909-08-29	1909-08-29
1911	1911-06-04	1911-06-27
1912	1912-09-01	1912-09-03
1913	1913-07-18	1913-07-19
1914	1914-06-11	1914-07-26
1915	1915-07-30	1915-07-31
1916	1916-05-11	1916-05-27
1918	1918-08-05	1918-08-15
1919	1919-07-13	1919-07-13
1921	1921-06-14	1921-06-14
1924	1924-06-19	1924-08-28
1925	1925-07-03	1925-09-22
1926	1926-05-25	1926-08-29
1927	1927-06-30	1927-09-16
1930	1930-06-24	1930-09-03
1931	1931-06-21	1931-09-22
1932	1932-06-22	1932-08-30
1933	1933-06-06	1933-07-03
1934	1934-06-26	1934-08-04
1935	1935-08-01	1935-08-12
1936	1936-05-09	1936-09-22
1937	1937-05-31	1937-09-05
1938	1938-08-14	1938-09-08
1939	1939-07-18	1939-09-10
1940	1940-07-21	1940-07-25
1941	1941-05-16	1941-09-06
1942	1942-07-18	1942-08-02
1943	1943-06-04	1943-08-28
1944	1944-06-16	1944-07-27
1947	1947-06-09	1947-09-09
1948	1948-06-26	1948-08-30
1949	1949-07-28	1949-07-29
1950	1950-06-26	1950-06-27
1951	1951-06-02	1951-10-06
1952	1952-05-10	1952-08-18
1953	1953-05-25	1953-08-31
1954	1954-06-09	1954-10-05
1955	1955-07-28	1955-08-06
1956	1956-06-24	1956-09-16
1957	1957-06-12	1957-09-02

Every Fixed Threshold

Fixed thresholds at Rock House
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	46	38	1954	15
35 C (95 F): Days	4	2	1952	2
90 F (32.2 C): Days	15	12	1952	2
0 C (32 F): Ice days (max	55	16	1917	2
0 C (32 F): Frost days (min	56	107	1915	55
-10 C (14 F): Days with min	55	16	1917	4
-20 C (-4 F): Days with min	5	3	1917	1
20 C (68 F): Tropical nights (min	42	14	1930	5
10 mm (0.39 in): Days with 10 mm or more rain	56	82	1929	74
25 mm (0.98 in): Days with 25 mm or more rain	56	37	1913	35
50 mm (1.97 in): Days with 50 mm or more rain	56	20	1957	20
100 mm (3.94 in): Days with 100 mm or more rain	33	6	1901	1
200 mm (7.87 in): Days with 200 mm or more rain	6	2	1940	1
10 cm (3.9 in): Days with 10 cm or more snowfall	14	3	1908	1
25 cm (9.8 in): Days with 25 cm or more snowfall	3	1	1902	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1900.

Download the Data

Data for Rock House 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).

Rock House Threshold Days by Year (USC00317363)

Key Facts for Rock House Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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