Moroni Threshold Days by Year (USC00425837)

16 fixed thresholds counted per year at Moroni (USC00425837): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Moroni Thresholds

Moroni: days with a maximum temperature at or above 30 C (86 F) in 94 years, most in 1934 with 115.
Moroni: days with a maximum temperature at or below 0 C (32 F) in 94 years, most in 1949 with 50.
Moroni: days with a maximum temperature at or above 90 F (32.2 C) in 93 years, most in 1934 with 85.
Moroni: nights with a minimum temperature at or below 0 C (32 F) in 91 years, most in 1965 with 219.
16 fixed thresholds have at least one qualifying day at Moroni.

Days at or above 30 C (86 F)

94 years with a qualifying day

Days per year at Moroni with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 115 in 1934.

Days at or above 30 C (86 F) per year at Moroni
Year	Days	Decade average
1911	20	32.7
1912	11	32.7
1913	15	32.7
1914	9	32.7
1915	24	32.7
1916	13	32.7
1917	63	32.7
1918	57	32.7
1919	82	32.7
1920	47	48.9
1921	43	48.9
1922	41	48.9
1923	26	48.9
1924	53	48.9
1925	25	48.9
1926	54	48.9
1927	51	48.9
1928	84	48.9
1929	65	48.9
1930	75	89.1
1931	98	89.1
1932	85	89.1
1933	99	89.1
1934	115	89.1
1935	98	89.1
1936	85	89.1
1937	77	89.1
1938	79	89.1
1939	80	89.1
1940	84	79
1941	64	79
1942	86	79
1949	82	79
1950	70	64.7
1951	73	64.7
1952	71	64.7
1953	56	64.7
1954	68	64.7
1955	66	64.7
1956	57	64.7
1957	44	64.7
1958	70	64.7
1959	72	64.7
1960	70	60.7
1961	65	60.7
1962	60	60.7
1963	59	60.7
1964	55	60.7
1965	31	60.7
1966	70	60.7
1967	64	60.7
1969	72	60.7
1971	74	70.9
1972	52	70.9
1973	62	70.9
1974	72	70.9
1976	65	70.9
1977	78	70.9
1978	78	70.9
1979	86	70.9
1980	66	66.4
1981	69	66.4
1982	59	66.4
1983	65	66.4
1984	77	66.4
1985	70	66.4
1986	86	66.4
1987	41	66.4
1988	78	66.4
1989	53	66.4
1990	57	47.8
1991	39	47.8
1992	47	47.8
1993	28	47.8
1994	76	47.8
1995	44	47.8
1996	67	47.8
1997	38	47.8
1998	48	47.8
1999	34	47.8
2000	74	65.8
2001	78	65.8
2002	77	65.8
2004	53	65.8
2007	47	65.8
2018	72	62.5
2019	53	62.5
2020	79	72.4
2021	76	72.4
2022	76	72.4
2023	47	72.4
2024	83	72.4
2025	74	72.4
2026	72	72.4

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

First to last qualifying date each year at Moroni
Year	First date	Last date
1911	1911-06-12	1911-09-10
1912	1912-06-03	1912-08-27
1913	1913-07-05	1913-09-01
1914	1914-06-29	1914-08-17
1915	1915-06-24	1915-08-31
1916	1916-06-27	1916-08-02
1917	1917-06-09	1917-09-25
1918	1918-06-04	1918-09-21
1919	1919-05-14	1919-09-12
1920	1920-05-28	1920-09-19
1921	1921-06-08	1921-08-27
1922	1922-05-24	1922-08-27
1923	1923-06-11	1923-09-09
1924	1924-06-12	1924-09-07
1925	1925-05-29	1925-09-16
1926	1926-05-22	1926-09-20
1927	1927-05-14	1927-09-20
1928	1928-04-30	1928-09-25
1929	1929-05-24	1929-09-19
1930	1930-05-26	1930-09-20
1931	1931-05-13	1931-09-28
1932	1932-05-17	1932-09-18
1933	1933-05-26	1933-09-29
1934	1934-04-23	1934-10-10
1935	1935-05-26	1935-10-02
1936	1936-04-16	1936-09-25
1937	1937-05-14	1937-09-19
1938	1938-05-15	1938-09-27
1939	1939-04-28	1939-09-20
1940	1940-05-10	1940-09-11
1941	1941-05-10	1941-09-17
1942	1942-05-21	1942-10-06
1949	1949-06-10	1949-09-24
1950	1950-05-21	1950-10-13
1951	1951-05-26	1951-09-25
1952	1952-06-06	1952-09-26
1953	1953-06-10	1953-09-20
1954	1954-05-08	1954-09-22
1955	1955-05-21	1955-09-15
1956	1956-05-18	1956-09-16
1957	1957-06-03	1957-08-24
1958	1958-05-19	1958-09-11
1959	1959-06-04	1959-09-12
1960	1960-05-09	1960-09-14
1961	1961-06-07	1961-08-28
1962	1962-05-09	1962-09-19
1963	1963-05-21	1963-09-30
1964	1964-05-15	1964-09-07
1965	1965-05-21	1965-09-15
1966	1966-05-21	1966-09-29
1967	1967-05-22	1967-09-08
1969	1969-05-28	1969-09-27
1971	1971-06-15	1971-09-14
1972	1972-05-30	1972-08-21
1973	1973-05-18	1973-09-22
1974	1974-05-25	1974-09-21
1976	1976-05-14	1976-09-05
1977	1977-05-31	1977-09-29
1978	1978-05-15	1978-09-27
1979	1979-06-04	1979-10-07
1980	1980-05-21	1980-10-04
1981	1981-06-06	1981-09-17
1982	1982-06-16	1982-09-09
1983	1983-05-27	1983-09-18
1984	1984-05-20	1984-09-18
1985	1985-06-06	1985-09-04
1986	1986-05-26	1986-09-07
1987	1987-06-04	1987-09-02
1988	1988-06-03	1988-09-09
1989	1989-06-15	1989-09-05
1990	1990-06-03	1990-09-14
1991	1991-06-12	1991-09-04
1992	1992-06-20	1992-08-29
1993	1993-06-14	1993-09-11
1994	1994-05-30	1994-09-08
1995	1995-06-12	1995-09-16
1996	1996-04-09	1996-10-10
1997	1997-05-31	1997-09-08
1998	1998-06-26	1998-09-04
1999	1999-06-15	1999-08-29
2000	2000-05-28	2000-09-16
2001	2001-05-24	2001-09-27
2002	2002-05-29	2002-09-04
2004	2004-06-03	2004-09-10
2007	2007-06-04	2007-09-04
2018	2018-06-02	2018-09-18
2019	2019-06-15	2019-09-16
2020	2020-05-28	2020-09-24
2021	2021-06-02	2021-09-16
2022	2022-06-08	2022-09-11
2023	2023-07-01	2023-08-30
2024	2024-06-05	2024-10-04
2025	2025-05-30	2025-09-10
2026	2026-05-11	2026-08-27

Every Fixed Threshold

Fixed thresholds at Moroni
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	94	115	1934	72
35 C (95 F): Days	82	45	1931	19
40 C (104 F): Days	2	6	1931	4
90 F (32.2 C): Days	93	85	1934	53
100 F (37.8 C): Days	22	18	1934	1
0 C (32 F): Ice days (max	94	50	1949	3
0 C (32 F): Frost days (min	91	219	1965	100
-10 C (14 F): Days with min	91	91	1964	14
-20 C (-4 F): Days with min	78	27	1949	2
-30 C (-22 F): Days with min	17	5	1937	1
20 C (68 F): Tropical nights (min	6	1	1912	1
10 mm (0.39 in): Days with 10 mm or more rain	76	19	1909	4
25 mm (0.98 in): Days with 25 mm or more rain	20	2	1983	1
50 mm (1.97 in): Days with 50 mm or more rain	2	1	1966	1
10 cm (3.9 in): Days with 10 cm or more snowfall	66	10	1979	2
25 cm (9.8 in): Days with 25 cm or more snowfall	6	2	1997	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1911.

Download the Data

Data for Moroni 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).

Moroni Threshold Days by Year (USC00425837)

Key Facts for Moroni Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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