Mtn Pass Threshold Days by Year (USC00045890)

16 fixed thresholds counted per year at Mtn Pass (USC00045890): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Mtn Pass Thresholds

Mtn Pass: days with 10 mm (0.39 in) or more of precipitation in 38 years, most in 2005 with 13.
Mtn Pass: days with 25 mm (0.98 in) or more of precipitation in 25 years, most in 2004 with 4.
Mtn Pass: days with a maximum temperature at or above 30 C (86 F) in 19 years, most in 1967 with 124.
Mtn Pass: days with a maximum temperature at or above 35 C (95 F) in 19 years, most in 1967 with 78.
16 fixed thresholds have at least one qualifying day at Mtn Pass.

Days at or above 30 C (86 F)

19 years with a qualifying day

Days per year at Mtn Pass with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 124 in 1967.

Days at or above 30 C (86 F) per year at Mtn Pass
Year	Days	Decade average
1956	102	91.5
1957	85	91.5
1958	87	91.5
1959	92	91.5
1963	94	101.8
1964	93	101.8
1967	124	101.8
1968	90	101.8
1969	108	101.8
1970	89	86.5
1971	85	86.5
1974	103	86.5
1976	70	86.5
1977	86	86.5
1978	86	86.5
1980	88	87.5
1984	87	87.5
2004	81	82
2005	83	82

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

First to last qualifying date each year at Mtn Pass
Year	First date	Last date
1956	1956-05-17	1956-09-27
1957	1957-06-01	1957-09-30
1958	1958-05-18	1958-09-21
1959	1959-05-12	1959-09-10
1963	1963-05-06	1963-10-04
1964	1964-05-18	1964-10-07
1967	1967-05-17	1967-11-04
1968	1968-06-03	1968-09-17
1969	1969-05-21	1969-09-29
1970	1970-05-18	1970-09-20
1971	1971-06-14	1971-09-16
1974	1974-05-08	1974-10-02
1976	1976-05-12	1976-09-05
1977	1977-05-31	1977-09-11
1978	1978-05-14	1978-10-15
1980	1980-05-21	1980-10-10
1984	1984-05-12	1984-09-30
2004	2004-05-04	2004-09-18
2005	2005-05-22	2005-09-20

Every Fixed Threshold

Fixed thresholds at Mtn Pass
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	19	124	1967	83
35 C (95 F): Days	19	78	1967	16
40 C (104 F): Days	4	27	1968	2
90 F (32.2 C): Days	19	100	1967	50
100 F (37.8 C): Days	14	49	1967	7
110 F (43.3 C): Days	1	4	1967	4
0 C (32 F): Ice days (max	11	9	1974	1
0 C (32 F): Frost days (min	18	119	1974	51
-10 C (14 F): Days with min	10	12	1974	1
20 C (68 F): Tropical nights (min	18	82	1969	14
25 C (77 F): Days with min	10	29	1969	2
10 mm (0.39 in): Days with 10 mm or more rain	38	13	2005	13
25 mm (0.98 in): Days with 25 mm or more rain	25	4	2004	1
50 mm (1.97 in): Days with 50 mm or more rain	7	1	1974	1
10 cm (3.9 in): Days with 10 cm or more snowfall	14	4	1964	2
25 cm (9.8 in): Days with 25 cm or more snowfall	3	1	1964	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1956.

Download the Data

Data for Mtn Pass 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).

Mtn Pass Threshold Days by Year (USC00045890)

Key Facts for Mtn Pass Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related