Cisco Threshold Days by Year (USC00421440)

15 fixed thresholds counted per year at Cisco (USC00421440): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Cisco Thresholds

Cisco: nights with a minimum temperature at or below 0 C (32 F) in 19 years, most in 1961 with 184.
Cisco: nights with a minimum temperature at or below -10 C (14 F) in 19 years, most in 1898 with 84.
Cisco: nights with a minimum temperature at or above 20 C (68 F) in 19 years, most in 1898 with 20.
Cisco: days with a maximum temperature at or above 30 C (86 F) in 18 years, most in 1958 with 122.
15 fixed thresholds have at least one qualifying day at Cisco.

Days at or above 30 C (86 F)

18 years with a qualifying day

Days per year at Cisco with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 122 in 1958.

Days at or above 30 C (86 F) per year at Cisco
Year	Days	Decade average
1893	109	113
1894	111	113
1895	114	113
1896	117	113
1897	110	113
1898	117	113
1904	113	113
1954	102	105
1955	96	105
1956	120	105
1957	85	105
1958	122	105
1960	119	109
1961	99	109
1962	110	109
1964	112	109
1965	98	109
1966	116	109

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

First to last qualifying date each year at Cisco
Year	First date	Last date
1893	1893-05-11	1893-09-27
1894	1894-04-25	1894-09-26
1895	1895-05-06	1895-09-28
1896	1896-04-25	1896-09-18
1897	1897-05-06	1897-10-09
1898	1898-04-25	1898-10-01
1904	1904-05-10	1904-09-21
1954	1954-05-08	1954-09-22
1955	1955-05-20	1955-09-15
1956	1956-05-04	1956-10-07
1957	1957-06-02	1957-10-01
1958	1958-05-05	1958-10-14
1960	1960-05-09	1960-09-30
1961	1961-05-10	1961-09-14
1962	1962-04-14	1962-10-04
1964	1964-05-13	1964-10-09
1965	1965-04-22	1965-10-11
1966	1966-05-03	1966-09-29

Every Fixed Threshold

Fixed thresholds at Cisco
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	18	122	1958	116
35 C (95 F): Days	18	80	1960	62
40 C (104 F): Days	14	15	1958	2
90 F (32.2 C): Days	18	107	1958	101
100 F (37.8 C): Days	18	50	1960	33
0 C (32 F): Ice days (max	17	44	1955	16
0 C (32 F): Frost days (min	19	184	1961	170
-10 C (14 F): Days with min	19	84	1898	52
-20 C (-4 F): Days with min	16	28	1955	9
-30 C (-22 F): Days with min	4	4	1962	2
20 C (68 F): Tropical nights (min	19	20	1898	6
25 C (77 F): Days with min	3	1	1896	1
10 mm (0.39 in): Days with 10 mm or more rain	15	10	1957	4
25 mm (0.98 in): Days with 25 mm or more rain	4	1	1896	1
10 cm (3.9 in): Days with 10 cm or more snowfall	9	2	1955	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1893.

Download the Data

Data for Cisco 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).

Cisco Threshold Days by Year (USC00421440)

Key Facts for Cisco Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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