Lemmon Threshold Days by Year (USC00394864)

21 fixed thresholds counted per year at Lemmon (USC00394864): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Lemmon Thresholds

Lemmon: days with 10 mm (0.39 in) or more of precipitation in 109 years, most in 2013 with 25.
Lemmon: nights with a minimum temperature at or below 0 C (32 F) in 108 years, most in 1935 with 208.
Lemmon: nights with a minimum temperature at or below -10 C (14 F) in 108 years, most in 1955 with 116.
Lemmon: nights with a minimum temperature at or below -20 C (-4 F) in 108 years, most in 1936 with 59.
21 fixed thresholds have at least one qualifying day at Lemmon.

Days at or above 30 C (86 F)

106 years with a qualifying day

Days per year at Lemmon with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 79 in 1936.

Days at or above 30 C (86 F) per year at Lemmon
Year	Days	Decade average
1909	30	30
1917	40	45
1918	36	45
1919	59	45
1920	42	44.9
1921	57	44.9
1922	47	44.9
1925	42	44.9
1926	37	44.9
1927	32	44.9
1929	57	44.9
1930	49	59.1
1931	52	59.1
1932	44	59.1
1933	62	59.1
1934	72	59.1
1935	57	59.1
1936	79	59.1
1937	63	59.1
1938	56	59.1
1939	57	59.1
1940	52	39.1
1941	51	39.1
1942	24	39.1
1943	43	39.1
1944	23	39.1
1945	36	39.1
1946	30	39.1
1947	42	39.1
1948	35	39.1
1949	55	39.1
1950	29	34.3
1951	19	34.3
1952	41	34.3
1953	23	34.3
1954	29	34.3
1955	44	34.3
1956	33	34.3
1957	29	34.3
1958	42	34.3
1959	54	34.3
1960	46	34.6
1961	55	34.6
1962	19	34.6
1963	34	34.6
1964	35	34.6
1965	16	34.6
1966	42	34.6
1967	34	34.6
1968	27	34.6
1969	38	34.6
1970	53	35
1971	32	35
1972	27	35
1973	35	35
1974	42	35
1975	33	35
1976	47	35
1977	26	35
1978	31	35
1979	24	35
1980	49	43.4
1981	33	43.4
1982	35	43.4
1983	43	43.4
1984	31	43.4
1986	27	43.4
1987	44	43.4
1988	67	43.4
1989	62	43.4
1990	59	37.7
1991	42	37.7
1992	25	37.7
1993	15	37.7
1994	35	37.7
1995	38	37.7
1996	39	37.7
1997	34	37.7
1998	58	37.7
1999	32	37.7
2000	51	52.1
2001	59	52.1
2002	69	52.1
2003	52	52.1
2004	42	52.1
2005	43	52.1
2006	66	52.1
2007	65	52.1
2009	22	52.1
2010	35	48.7
2011	49	48.7
2012	71	48.7
2013	34	48.7
2014	22	48.7
2015	62	48.7
2016	61	48.7
2017	61	48.7
2018	62	48.7
2019	30	48.7
2020	46	54.1
2021	73	54.1
2022	57	54.1
2023	43	54.1
2024	54	54.1
2025	46	54.1
2026	60	54.1

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

First to last qualifying date each year at Lemmon
Year	First date	Last date
1909	1909-06-18	1909-09-27
1917	1917-05-16	1917-09-24
1918	1918-05-05	1918-09-22
1919	1919-05-27	1919-09-17
1920	1920-06-08	1920-10-07
1921	1921-06-11	1921-10-13
1922	1922-06-04	1922-10-04
1925	1925-05-19	1925-09-26
1926	1926-04-29	1926-09-01
1927	1927-06-23	1927-10-19
1929	1929-05-24	1929-09-21
1930	1930-05-25	1930-09-22
1931	1931-05-14	1931-09-17
1932	1932-05-13	1932-09-30
1933	1933-05-31	1933-09-18
1934	1934-05-05	1934-10-11
1935	1935-06-14	1935-10-15
1936	1936-05-15	1936-09-22
1937	1937-05-27	1937-10-03
1938	1938-04-30	1938-10-03
1939	1939-05-05	1939-09-18
1940	1940-05-09	1940-09-20
1941	1941-05-13	1941-09-19
1942	1942-04-14	1942-09-10
1943	1943-05-27	1943-09-27
1944	1944-05-13	1944-08-18
1945	1945-06-21	1945-10-16
1946	1946-06-06	1946-09-15
1947	1947-07-02	1947-10-03
1948	1948-05-18	1948-09-18
1949	1949-05-28	1949-09-24
1950	1950-06-05	1950-09-06
1951	1951-06-15	1951-08-23
1952	1952-04-26	1952-09-27
1953	1953-06-12	1953-10-01
1954	1954-05-20	1954-09-26
1955	1955-05-01	1955-09-17
1956	1956-05-21	1956-10-12
1957	1957-07-01	1957-08-13
1958	1958-05-11	1958-10-13
1959	1959-06-03	1959-09-13
1960	1960-05-31	1960-10-04
1961	1961-05-30	1961-08-31
1962	1962-04-24	1962-09-07
1963	1963-06-22	1963-10-04
1964	1964-05-20	1964-09-01
1965	1965-07-07	1965-08-16
1966	1966-05-04	1966-09-12
1967	1967-05-22	1967-09-22
1968	1968-04-30	1968-09-14
1969	1969-05-14	1969-09-19
1970	1970-05-17	1970-10-05
1971	1971-06-23	1971-09-13
1972	1972-05-16	1972-09-19
1973	1973-06-13	1973-08-31
1974	1974-06-03	1974-09-26
1975	1975-05-16	1975-08-31
1976	1976-06-02	1976-09-16
1977	1977-04-09	1977-09-05
1978	1978-07-04	1978-09-10
1979	1979-05-16	1979-09-16
1980	1980-04-20	1980-10-08
1981	1981-06-06	1981-09-12
1982	1982-05-03	1982-09-10
1983	1983-05-26	1983-09-27
1984	1984-05-16	1984-09-19
1986	1986-05-04	1986-08-24
1987	1987-04-18	1987-10-03
1988	1988-05-25	1988-08-30
1989	1989-04-22	1989-10-01
1990	1990-06-10	1990-10-05
1991	1991-06-11	1991-10-16
1992	1992-04-30	1992-10-02
1993	1993-06-20	1993-10-06
1994	1994-05-17	1994-09-10
1995	1995-06-14	1995-09-16
1996	1996-06-11	1996-09-09
1997	1997-06-01	1997-10-03
1998	1998-05-17	1998-09-19
1999	1999-06-22	1999-09-22
2000	2000-06-07	2000-09-28
2001	2001-04-28	2001-09-06
2002	2002-05-28	2002-09-18
2003	2003-04-13	2003-10-19
2004	2004-06-04	2004-09-18
2005	2005-06-19	2005-10-01
2006	2006-05-18	2006-09-14
2007	2007-05-18	2007-09-30
2009	2009-05-18	2009-09-18
2010	2010-05-28	2010-09-28
2011	2011-06-02	2011-10-04
2012	2012-04-01	2012-09-16
2013	2013-05-13	2013-09-07
2014	2014-05-23	2014-09-27
2015	2015-06-08	2015-10-11
2016	2016-05-05	2016-09-12
2017	2017-05-07	2017-09-13
2018	2018-05-26	2018-09-09
2019	2019-06-03	2019-09-17
2020	2020-06-01	2020-09-22
2021	2021-06-03	2021-10-06
2022	2022-06-18	2022-09-20
2023	2023-04-11	2023-09-18
2024	2024-06-15	2024-10-09
2025	2025-05-10	2025-10-03
2026	2026-05-11	2026-09-11

Every Fixed Threshold

Fixed thresholds at Lemmon
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	106	79	1936	60
35 C (95 F): Days	102	38	1936	25
40 C (104 F): Days	31	14	1936	3
45 C (113 F): Days	1	2	1936	2
90 F (32.2 C): Days	106	63	1936	37
100 F (37.8 C): Days	73	26	1936	12
110 F (43.3 C): Days	2	2	1936	2
0 C (32 F): Ice days (max	106	107	1978	26
0 C (32 F): Frost days (min	108	208	1935	103
-10 C (14 F): Days with min	108	116	1955	27
-20 C (-4 F): Days with min	108	59	1936	10
-30 C (-22 F): Days with min	73	26	1936	1
-40 C (-40 F): Days with min	3	4	1936	1
20 C (68 F): Tropical nights (min	76	22	1936	8
25 C (77 F): Days with min	2	4	1930	2
10 mm (0.39 in): Days with 10 mm or more rain	109	25	2013	14
25 mm (0.98 in): Days with 25 mm or more rain	103	10	2013	5
50 mm (1.97 in): Days with 50 mm or more rain	36	4	2013	2
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1922	1
10 cm (3.9 in): Days with 10 cm or more snowfall	58	8	1996	3
25 cm (9.8 in): Days with 25 cm or more snowfall	11	3	1996	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 Lemmon 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).

Lemmon Threshold Days by Year (USC00394864)

Key Facts for Lemmon Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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