Port Chicago Naval Dep Threshold Days by Year (USC00047070)

12 fixed thresholds counted per year at Port Chicago Naval Dep (USC00047070): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Port Chicago Naval Dep Thresholds

Port Chicago Naval Dep: days with a maximum temperature at or above 30 C (86 F) in 28 years, most in 1967 with 95.
Port Chicago Naval Dep: days with a maximum temperature at or above 35 C (95 F) in 28 years, most in 1961 with 32.
Port Chicago Naval Dep: days with a maximum temperature at or above 90 F (32.2 C) in 28 years, most in 1967 with 65.
Port Chicago Naval Dep: nights with a minimum temperature at or below 0 C (32 F) in 28 years, most in 1956 with 74.
12 fixed thresholds have at least one qualifying day at Port Chicago Naval Dep.

Days at or above 30 C (86 F)

28 years with a qualifying day

Days per year at Port Chicago Naval Dep with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 95 in 1967.

Days at or above 30 C (86 F) per year at Port Chicago Naval Dep
Year	Days	Decade average
1947	71	56.3
1948	47	56.3
1949	51	56.3
1950	70	60
1951	37	60
1952	58	60
1953	57	60
1954	52	60
1955	57	60
1956	42	60
1957	70	60
1958	72	60
1959	85	60
1960	65	69
1961	79	69
1962	44	69
1963	56	69
1964	62	69
1965	44	69
1966	80	69
1967	95	69
1968	79	69
1969	86	69
1970	80	80.2
1971	76	80.2
1972	80	80.2
1973	82	80.2
1974	83	80.2

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

First to last qualifying date each year at Port Chicago Naval Dep
Year	First date	Last date
1947	1947-04-12	1947-10-04
1948	1948-06-20	1948-10-09
1949	1949-04-23	1949-10-15
1950	1950-04-19	1950-10-14
1951	1951-05-26	1951-10-09
1952	1952-05-17	1952-10-06
1953	1953-05-05	1953-10-08
1954	1954-04-17	1954-10-16
1955	1955-05-11	1955-10-03
1956	1956-05-16	1956-09-30
1957	1957-04-29	1957-09-24
1958	1958-05-15	1958-10-18
1959	1959-04-30	1959-10-25
1960	1960-05-31	1960-09-27
1961	1961-04-04	1961-10-18
1962	1962-04-08	1962-09-17
1963	1963-05-18	1963-10-02
1964	1964-04-15	1964-10-21
1965	1965-04-26	1965-10-26
1966	1966-04-01	1966-10-10
1967	1967-05-15	1967-10-17
1968	1968-04-28	1968-10-24
1969	1969-05-05	1969-10-01
1970	1970-05-02	1970-10-10
1971	1971-06-07	1971-10-14
1972	1972-05-01	1972-10-07
1973	1973-05-10	1973-10-17
1974	1974-05-25	1974-10-20

Every Fixed Threshold

Fixed thresholds at Port Chicago Naval Dep
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	28	95	1967	83
35 C (95 F): Days	28	32	1961	18
40 C (104 F): Days	17	9	1961	6
45 C (113 F): Days	1	1	1972	1
90 F (32.2 C): Days	28	65	1967	48
100 F (37.8 C): Days	27	12	1950	3
110 F (43.3 C): Days	3	2	1961	2
0 C (32 F): Frost days (min	28	74	1956	31
20 C (68 F): Tropical nights (min	1	1	1973	1
10 mm (0.39 in): Days with 10 mm or more rain	28	27	1958	8
25 mm (0.98 in): Days with 25 mm or more rain	24	9	1973	1
50 mm (1.97 in): Days with 50 mm or more rain	7	2	1962	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1947.

Download the Data

Data for Port Chicago Naval Dep 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).

Port Chicago Naval Dep Threshold Days by Year (USC00047070)

Key Facts for Port Chicago Naval Dep Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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