Black Mtn 2 W Threshold Days by Year (USC00310843)

15 fixed thresholds counted per year at Black Mtn 2 W (USC00310843): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Black Mtn 2 W Thresholds

Black Mtn 2 W: days with 10 mm (0.39 in) or more of precipitation in 57 years, most in 1959 with 55.
Black Mtn 2 W: days with 25 mm (0.98 in) or more of precipitation in 57 years, most in 1972 with 20.
Black Mtn 2 W: days with 50 mm (1.97 in) or more of precipitation in 52 years, most in 1950 with 6.
Black Mtn 2 W: nights with a minimum temperature at or below 0 C (32 F) in 51 years, most in 1984 with 117.
15 fixed thresholds have at least one qualifying day at Black Mtn 2 W.

Days at or above 30 C (86 F)

38 years with a qualifying day

Days per year at Black Mtn 2 W with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 60 in 1954.

Days at or above 30 C (86 F) per year at Black Mtn 2 W
Year	Days	Decade average
1950	15	37.9
1951	40	37.9
1952	44	37.9
1953	51	37.9
1954	60	37.9
1955	20	37.9
1956	46	37.9
1957	38	37.9
1958	33	37.9
1959	32	37.9
1961	14	27.2
1962	36	27.2
1963	19	27.2
1964	26	27.2
1965	18	27.2
1966	28	27.2
1967	14	27.2
1968	53	27.2
1969	37	27.2
1970	60	37.4
1971	21	37.4
1972	25	37.4
1973	34	37.4
1975	42	37.4
1976	21	37.4
1977	59	37.4
1984	24	36.8
1985	47	36.8
1986	51	36.8
1989	25	36.8
1998	60	60
2003	22	30.6
2004	18	30.6
2005	33	30.6
2006	40	30.6
2007	48	30.6
2008	35	30.6
2009	18	30.6

For each year, a bar from the first to the last day at Black Mtn 2 W meeting 30 C (86 F).

First to last qualifying date each year at Black Mtn 2 W
Year	First date	Last date
1950	1950-05-07	1950-09-04
1951	1951-06-02	1951-10-08
1952	1952-05-06	1952-08-22
1953	1953-05-24	1953-09-30
1954	1954-06-09	1954-10-06
1955	1955-05-26	1955-09-23
1956	1956-05-12	1956-09-17
1957	1957-05-23	1957-09-05
1958	1958-06-06	1958-09-17
1959	1959-05-02	1959-10-05
1961	1961-06-02	1961-09-04
1962	1962-04-30	1962-09-13
1963	1963-04-03	1963-08-09
1964	1964-05-08	1964-09-05
1965	1965-06-29	1965-08-27
1966	1966-06-23	1966-09-04
1967	1967-04-06	1967-08-18
1968	1968-04-20	1968-08-27
1969	1969-05-29	1969-08-26
1970	1970-05-14	1970-09-26
1971	1971-06-05	1971-09-21
1972	1972-04-13	1972-09-15
1973	1973-06-18	1973-09-24
1975	1975-05-21	1975-09-06
1976	1976-07-11	1976-09-10
1977	1977-05-06	1977-09-10
1984	1984-06-03	1984-09-26
1985	1985-03-30	1985-09-11
1986	1986-04-26	1986-08-16
1989	1989-05-25	1989-09-09
1998	1998-05-16	1998-09-29
2003	2003-05-09	2003-08-30
2004	2004-05-22	2004-08-05
2005	2005-06-06	2005-09-16
2006	2006-04-16	2006-08-30
2007	2007-05-02	2007-09-11
2008	2008-06-05	2008-09-08
2009	2009-04-26	2009-08-13

Every Fixed Threshold

Fixed thresholds at Black Mtn 2 W
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	38	60	1954	18
35 C (95 F): Days	5	7	1952	1
90 F (32.2 C): Days	33	28	1998	1
0 C (32 F): Ice days (max	37	10	1958	8
0 C (32 F): Frost days (min	51	117	1984	82
-10 C (14 F): Days with min	50	29	1977	8
-20 C (-4 F): Days with min	9	2	1958	1
20 C (68 F): Tropical nights (min	34	6	2005	2
10 mm (0.39 in): Days with 10 mm or more rain	57	55	1959	46
25 mm (0.98 in): Days with 25 mm or more rain	57	20	1972	18
50 mm (1.97 in): Days with 50 mm or more rain	52	6	1950	4
100 mm (3.94 in): Days with 100 mm or more rain	16	3	1964	2
200 mm (7.87 in): Days with 200 mm or more rain	1	1	2004	1
10 cm (3.9 in): Days with 10 cm or more snowfall	21	5	1966	1
25 cm (9.8 in): Days with 25 cm or more snowfall	4	1	1969	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1950.

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Data for Black Mtn 2 W 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).

Black Mtn 2 W Threshold Days by Year (USC00310843)

Key Facts for Black Mtn 2 W Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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