Morenci Threshold Days by Year (USC00205601)

18 fixed thresholds counted per year at Morenci (USC00205601): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Morenci Thresholds

Morenci: days with a maximum temperature at or above 30 C (86 F) in 30 years, most in 1936 with 84.
Morenci: days with a maximum temperature at or above 90 F (32.2 C) in 30 years, most in 1931 with 55.
Morenci: days with a maximum temperature at or below 0 C (32 F) in 30 years, most in 1912 with 59.
Morenci: nights with a minimum temperature at or below 0 C (32 F) in 30 years, most in 1926 with 163.
18 fixed thresholds have at least one qualifying day at Morenci.

Days at or above 30 C (86 F)

30 years with a qualifying day

Days per year at Morenci with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 84 in 1936.

Days at or above 30 C (86 F) per year at Morenci
Year	Days	Decade average
1908	42	30.5
1909	19	30.5
1910	35	39.7
1911	45	39.7
1912	19	39.7
1913	55	39.7
1914	44	39.7
1915	13	39.7
1916	56	39.7
1917	23	39.7
1918	48	39.7
1919	59	39.7
1920	37	47.5
1921	79	47.5
1924	28	47.5
1925	64	47.5
1926	39	47.5
1927	36	47.5
1928	57	47.5
1929	40	47.5
1930	62	66.3
1931	73	66.3
1932	63	66.3
1933	78	66.3
1934	83	66.3
1935	53	66.3
1936	84	66.3
1937	42	66.3
1938	52	66.3
1939	73	66.3

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

First to last qualifying date each year at Morenci
Year	First date	Last date
1908	1908-05-25	1908-09-27
1909	1909-06-23	1909-09-14
1910	1910-06-15	1910-08-30
1911	1911-05-10	1911-09-18
1912	1912-06-26	1912-09-10
1913	1913-06-06	1913-10-07
1914	1914-05-25	1914-09-22
1915	1915-04-24	1915-09-16
1916	1916-05-25	1916-10-08
1917	1917-05-18	1917-08-27
1918	1918-05-05	1918-08-26
1919	1919-05-29	1919-09-28
1920	1920-05-23	1920-10-22
1921	1921-05-20	1921-09-17
1924	1924-06-19	1924-09-21
1925	1925-04-23	1925-09-20
1926	1926-05-06	1926-09-19
1927	1927-05-09	1927-09-18
1928	1928-05-03	1928-10-11
1929	1929-05-27	1929-09-28
1930	1930-04-12	1930-09-22
1931	1931-05-18	1931-10-06
1932	1932-05-15	1932-09-19
1933	1933-05-24	1933-09-25
1934	1934-05-06	1934-09-26
1935	1935-06-13	1935-09-25
1936	1936-05-07	1936-09-26
1937	1937-05-31	1937-10-01
1938	1938-05-03	1938-10-17
1939	1939-05-19	1939-10-09

Every Fixed Threshold

Fixed thresholds at Morenci
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	30	84	1936	73
35 C (95 F): Days	27	29	1931	9
40 C (104 F): Days	5	7	1936	7
90 F (32.2 C): Days	30	55	1931	36
100 F (37.8 C): Days	15	11	1934	4
0 C (32 F): Ice days (max	30	59	1912	28
0 C (32 F): Frost days (min	30	163	1926	156
-10 C (14 F): Days with min	30	60	1912	25
-20 C (-4 F): Days with min	21	17	1917	1
-30 C (-22 F): Days with min	2	1	1917	1
20 C (68 F): Tropical nights (min	30	28	1935	11
25 C (77 F): Days with min	1	2	1911	2
10 mm (0.39 in): Days with 10 mm or more rain	27	37	1920	26
25 mm (0.98 in): Days with 25 mm or more rain	27	14	1913	7
50 mm (1.97 in): Days with 50 mm or more rain	13	3	1909	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1920	1
10 cm (3.9 in): Days with 10 cm or more snowfall	14	4	1914	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1908	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1908.

Download the Data

Data for Morenci 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).

Morenci Threshold Days by Year (USC00205601)

Key Facts for Morenci Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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