Chatsworth Threshold Days by Year

15 fixed thresholds counted per year at Chatsworth (CA006111467): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Chatsworth Thresholds

Chatsworth: days with 10 mm (0.39 in) or more of precipitation in 28 years, most in 1977 with 45.
Chatsworth: days with 25 mm (0.98 in) or more of precipitation in 28 years, most in 1953 with 10.
Chatsworth: days with 10 cm (3.9 in) or more of snowfall in 28 years, most in 1976 with 16.
Chatsworth: days with a maximum temperature at or below 0 C (32 F) in 21 years, most in 1978 with 95.
15 fixed thresholds have at least one qualifying day at Chatsworth.

Days at or above 30 C (86 F)

19 years with a qualifying day

Days per year at Chatsworth with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 22 in 1964.

Days at or above 30 C (86 F) per year at Chatsworth
Year	Days	Decade average
1964	22	10
1965	5	10
1966	15	10
1967	2	10
1968	8	10
1969	8	10
1970	11	8.7
1971	5	8.7
1972	4	8.7
1973	19	8.7
1974	7	8.7
1975	16	8.7
1976	4	8.7
1977	7	8.7
1978	8	8.7
1979	6	8.7
1981	2	5.7
1982	2	5.7
1983	13	5.7

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

First to last qualifying date each year at Chatsworth
Year	First date	Last date
1964	1964-05-23	1964-07-28
1965	1965-06-06	1965-08-14
1966	1966-06-23	1966-07-25
1967	1967-06-12	1967-06-13
1968	1968-06-08	1968-08-24
1969	1969-06-12	1969-08-31
1970	1970-06-09	1970-09-21
1971	1971-05-19	1971-08-10
1972	1972-07-12	1972-07-24
1973	1973-06-10	1973-09-04
1974	1974-07-04	1974-08-21
1975	1975-05-19	1975-08-10
1976	1976-06-10	1976-06-15
1977	1977-05-21	1977-08-28
1978	1978-05-27	1978-08-14
1979	1979-06-10	1979-09-01
1981	1981-06-15	1981-07-08
1982	1982-07-06	1982-07-16
1983	1983-06-13	1983-09-10

Every Fixed Threshold

Fixed thresholds at Chatsworth
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	19	22	1964	13
35 C (95 F): Days	1	2	1973	2
90 F (32.2 C): Days	9	6	1973	1
0 C (32 F): Ice days (max	21	95	1978	66
0 C (32 F): Frost days (min	21	196	1962	177
-10 C (14 F): Days with min	21	86	1962	46
-20 C (-4 F): Days with min	21	25	1962	10
-30 C (-22 F): Days with min	9	4	1979	2
20 C (68 F): Tropical nights (min	16	10	1973	6
10 mm (0.39 in): Days with 10 mm or more rain	28	45	1977	39
25 mm (0.98 in): Days with 25 mm or more rain	28	10	1953	4
50 mm (1.97 in): Days with 50 mm or more rain	10	3	1953	1
10 cm (3.9 in): Days with 10 cm or more snowfall	28	16	1976	11
25 cm (9.8 in): Days with 25 cm or more snowfall	16	2	1953	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	1965	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1964.

Download the Data

Data for Chatsworth 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 2026-10-15 (15 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-15. Last revised 15 October 2026 (2026-10-15).

Chatsworth Threshold Days by Year

Key Facts for Chatsworth Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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