Chatsworth Threshold Days by Year (USC00281598)

16 fixed thresholds counted per year at Chatsworth (USC00281598): 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 24 years, most in 1972 with 51.
Chatsworth: days with 25 mm (0.98 in) or more of precipitation in 24 years, most in 1972 with 20.
Chatsworth: days with a maximum temperature at or above 30 C (86 F) in 23 years, most in 1951 with 70.
Chatsworth: days with a maximum temperature at or above 90 F (32.2 C) in 23 years, most in 1952 with 42.
16 fixed thresholds have at least one qualifying day at Chatsworth.

Days at or above 30 C (86 F)

23 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 70 in 1951.

Days at or above 30 C (86 F) per year at Chatsworth
Year	Days	Decade average
1949	61	61
1950	42	61.8
1951	70	61.8
1952	69	61.8
1953	66	61.8
1955	62	61.8
1961	58	53.1
1962	50	53.1
1963	48	53.1
1964	61	53.1
1965	63	53.1
1966	58	53.1
1967	33	53.1
1968	54	53.1
1969	53	53.1
1970	63	54.3
1971	58	54.3
1972	44	54.3
1973	39	54.3
1974	56	54.3
1975	57	54.3
1976	64	54.3
1978	53	54.3

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
1949	1949-05-04	1949-10-11
1950	1950-05-06	1950-11-01
1951	1951-04-29	1951-10-06
1952	1952-04-23	1952-10-02
1953	1953-04-25	1953-09-30
1955	1955-04-11	1955-09-16
1961	1961-04-25	1961-09-24
1962	1962-04-26	1962-10-12
1963	1963-05-05	1963-09-20
1964	1964-05-08	1964-09-23
1965	1965-05-04	1965-09-24
1966	1966-05-06	1966-09-05
1967	1967-06-02	1967-10-05
1968	1968-06-06	1968-09-25
1969	1969-04-27	1969-09-17
1970	1970-05-09	1970-09-26
1971	1971-05-19	1971-09-10
1972	1972-05-07	1972-09-26
1973	1973-04-22	1973-09-07
1974	1974-04-29	1974-09-14
1975	1975-05-20	1975-10-14
1976	1976-04-16	1976-09-19
1978	1978-05-20	1978-09-21

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	23	70	1951	53
35 C (95 F): Days	21	21	1955	3
90 F (32.2 C): Days	23	42	1952	22
100 F (37.8 C): Days	6	5	1953	1
0 C (32 F): Ice days (max	23	22	1963	11
0 C (32 F): Frost days (min	23	137	1966	127
-10 C (14 F): Days with min	23	37	1963	33
-20 C (-4 F): Days with min	9	7	1961	2
20 C (68 F): Tropical nights (min	23	34	1949	23
25 C (77 F): Days with min	1	1	1978	1
10 mm (0.39 in): Days with 10 mm or more rain	24	51	1972	41
25 mm (0.98 in): Days with 25 mm or more rain	24	20	1972	13
50 mm (1.97 in): Days with 50 mm or more rain	23	4	1953	4
100 mm (3.94 in): Days with 100 mm or more rain	8	2	1972	1
10 cm (3.9 in): Days with 10 cm or more snowfall	4	2	1953	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1952	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1949.

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 2026-10-17 (17 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Chatsworth Threshold Days by Year (USC00281598)

Key Facts for Chatsworth Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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