Tempe 3 S Threshold Days by Year (USC00028494)

14 fixed thresholds counted per year at Tempe 3 S (USC00028494): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Tempe 3 S Thresholds

Tempe 3 S: days with 10 mm (0.39 in) or more of precipitation in 45 years, most in 1905 with 18.
Tempe 3 S: days with a maximum temperature at or above 30 C (86 F) in 42 years, most in 1950 with 211.
Tempe 3 S: days with a maximum temperature at or above 35 C (95 F) in 42 years, most in 1910 with 148.
Tempe 3 S: days with a maximum temperature at or above 40 C (104 F) in 42 years, most in 1905 with 86.
14 fixed thresholds have at least one qualifying day at Tempe 3 S.

Days at or above 30 C (86 F)

42 years with a qualifying day

Days per year at Tempe 3 S with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 211 in 1950.

Days at or above 30 C (86 F) per year at Tempe 3 S
Year	Days	Decade average
1905	176	191.8
1906	202	191.8
1907	192	191.8
1908	201	191.8
1909	188	191.8
1910	201	175.9
1911	181	175.9
1912	162	175.9
1913	187	175.9
1914	176	175.9
1915	175	175.9
1916	177	175.9
1917	166	175.9
1918	175	175.9
1919	159	175.9
1920	135	165.1
1921	188	165.1
1922	169	165.1
1924	161	165.1
1926	161	165.1
1928	170	165.1
1929	172	165.1
1930	151	172.2
1931	187	172.2
1932	173	172.2
1933	163	172.2
1934	179	172.2
1935	161	172.2
1936	186	172.2
1937	179	172.2
1938	163	172.2
1939	180	172.2
1940	172	163.3
1941	145	163.3
1942	158	163.3
1943	170	163.3
1944	162	163.3
1945	160	163.3
1947	166	163.3
1949	173	163.3
1950	211	195
1951	179	195

For each year, a bar from the first to the last day at Tempe 3 S meeting 30 C (86 F).

First to last qualifying date each year at Tempe 3 S
Year	First date	Last date
1905	1905-04-04	1905-10-31
1906	1906-03-23	1906-11-15
1907	1907-03-17	1907-11-06
1908	1908-02-27	1908-11-18
1909	1909-04-02	1909-11-08
1910	1910-03-02	1910-11-02
1911	1911-03-15	1911-10-18
1912	1912-04-23	1912-10-26
1913	1913-03-31	1913-11-09
1914	1914-03-14	1914-10-20
1915	1915-03-24	1915-11-04
1916	1916-03-09	1916-10-21
1917	1917-03-28	1917-10-13
1918	1918-03-31	1918-11-02
1919	1919-04-01	1919-10-19
1920	1920-04-29	1920-10-10
1921	1921-02-24	1921-11-05
1922	1922-04-19	1922-10-26
1924	1924-04-15	1924-11-05
1926	1926-03-08	1926-10-27
1928	1928-03-22	1928-10-28
1929	1929-04-02	1929-10-23
1930	1930-04-06	1930-10-22
1931	1931-03-22	1931-11-07
1932	1932-04-02	1932-10-18
1933	1933-04-03	1933-10-28
1934	1934-03-29	1934-11-11
1935	1935-04-13	1935-10-14
1936	1936-04-10	1936-10-29
1937	1937-04-13	1937-10-29
1938	1938-04-17	1938-10-15
1939	1939-03-16	1939-10-30
1940	1940-04-10	1940-10-25
1941	1941-04-25	1941-10-11
1942	1942-04-11	1942-10-12
1943	1943-03-29	1943-10-28
1944	1944-04-03	1944-11-05
1945	1945-04-09	1945-11-05
1947	1947-03-26	1947-11-02
1949	1949-04-11	1949-11-19
1950	1950-03-23	1950-12-11
1951	1951-01-26	1951-10-30

Every Fixed Threshold

Fixed thresholds at Tempe 3 S
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	42	211	1950	179
35 C (95 F): Days	42	148	1910	135
40 C (104 F): Days	42	86	1905	54
45 C (113 F): Days	26	13	1905	2
90 F (32.2 C): Days	42	183	1910	158
100 F (37.8 C): Days	42	121	1910	95
110 F (43.3 C): Days	41	31	1905	5
0 C (32 F): Frost days (min	42	70	1924	49
-10 C (14 F): Days with min	1	2	1913	2
20 C (68 F): Tropical nights (min	42	91	1931	44
25 C (77 F): Days with min	40	22	1933	2
10 mm (0.39 in): Days with 10 mm or more rain	45	18	1905	8
25 mm (0.98 in): Days with 25 mm or more rain	28	4	1905	1
50 mm (1.97 in): Days with 50 mm or more rain	4	2	1911	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1905.

Download the Data

Data for Tempe 3 S 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).

Tempe 3 S Threshold Days by Year (USC00028494)

Key Facts for Tempe 3 S Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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