Arriba Threshold Days by Year (USC00050348)

16 fixed thresholds counted per year at Arriba (USC00050348): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Arriba Thresholds

Arriba: days with 10 mm (0.39 in) or more of precipitation in 32 years, most in 1915 with 21.
Arriba: days with 25 mm (0.98 in) or more of precipitation in 31 years, most in 1915 with 6.
Arriba: days with 10 cm (3.9 in) or more of snowfall in 27 years, most in 1909 with 8.
Arriba: nights with a minimum temperature at or below 0 C (32 F) in 26 years, most in 1908 with 193.
16 fixed thresholds have at least one qualifying day at Arriba.

Days at or above 30 C (86 F)

25 years with a qualifying day

Days per year at Arriba with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 82 in 1954.

Days at or above 30 C (86 F) per year at Arriba
Year	Days	Decade average
1907	39	36.3
1908	38	36.3
1909	32	36.3
1911	60	41.2
1912	20	41.2
1913	57	41.2
1914	51	41.2
1915	18	41.2
1929	60	60
1930	48	64.4
1933	70	64.4
1935	62	64.4
1936	73	64.4
1937	72	64.4
1938	49	64.4
1939	77	64.4
1940	55	53.5
1941	47	53.5
1942	44	53.5
1943	69	53.5
1944	55	53.5
1945	51	53.5
1953	71	68.3
1954	82	68.3
1957	52	68.3

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

First to last qualifying date each year at Arriba
Year	First date	Last date
1907	1907-03-19	1907-09-18
1908	1908-05-19	1908-09-24
1909	1909-06-05	1909-09-02
1911	1911-05-18	1911-09-27
1912	1912-05-30	1912-09-08
1913	1913-05-25	1913-09-07
1914	1914-06-10	1914-09-29
1915	1915-05-13	1915-09-23
1929	1929-05-28	1929-09-23
1930	1930-04-08	1930-09-22
1933	1933-05-31	1933-09-29
1935	1935-06-09	1935-09-20
1936	1936-05-05	1936-09-25
1937	1937-05-14	1937-09-23
1938	1938-05-28	1938-09-09
1939	1939-05-19	1939-09-22
1940	1940-05-31	1940-09-08
1941	1941-05-13	1941-09-20
1942	1942-05-26	1942-10-07
1943	1943-05-28	1943-09-18
1944	1944-05-14	1944-09-22
1945	1945-05-26	1945-09-21
1953	1953-05-24	1953-09-28
1954	1954-05-21	1954-10-02
1957	1957-06-08	1957-09-30

Every Fixed Threshold

Fixed thresholds at Arriba
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	25	82	1954	52
35 C (95 F): Days	20	33	1936	6
40 C (104 F): Days	2	1	1929	1
90 F (32.2 C): Days	25	51	1936	27
100 F (37.8 C): Days	9	7	1954	7
0 C (32 F): Ice days (max	25	43	1913	20
0 C (32 F): Frost days (min	26	193	1908	175
-10 C (14 F): Days with min	26	72	1913	44
-20 C (-4 F): Days with min	26	13	1942	2
-30 C (-22 F): Days with min	5	2	1933	1
20 C (68 F): Tropical nights (min	4	1	1907	1
10 mm (0.39 in): Days with 10 mm or more rain	32	21	1915	18
25 mm (0.98 in): Days with 25 mm or more rain	31	6	1915	2
50 mm (1.97 in): Days with 50 mm or more rain	9	2	1942	1
10 cm (3.9 in): Days with 10 cm or more snowfall	27	8	1909	2
25 cm (9.8 in): Days with 25 cm or more snowfall	4	1	1913	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1907.

Download the Data

Data for Arriba 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).

Arriba Threshold Days by Year (USC00050348)

Key Facts for Arriba Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related