Millgrove Threshold Days by Year

15 fixed thresholds counted per year at Millgrove (CA006155183): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Millgrove Thresholds

Millgrove: days with 10 cm (3.9 in) or more of snowfall in 23 years, most in 1965 with 8.
Millgrove: days with 10 mm (0.39 in) or more of precipitation in 22 years, most in 1982 with 39.
Millgrove: days with 25 mm (0.98 in) or more of precipitation in 22 years, most in 1956 with 10.
Millgrove: days with a maximum temperature at or below 0 C (32 F) in 21 years, most in 1960 with 87.
15 fixed thresholds have at least one qualifying day at Millgrove.

Days at or above 30 C (86 F)

20 years with a qualifying day

Days per year at Millgrove with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 33 in 1955.

Days at or above 30 C (86 F) per year at Millgrove
Year	Days	Decade average
1954	16	17.2
1955	33	17.2
1956	7	17.2
1958	4	17.2
1959	26	17.2
1960	6	11.1
1961	7	11.1
1964	15	11.1
1965	9	11.1
1966	20	11.1
1967	3	11.1
1968	13	11.1
1969	16	11.1
1971	11	9.2
1972	6	9.2
1973	17	9.2
1976	6	9.2
1977	6	9.2
1981	6	4.5
1982	3	4.5

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

First to last qualifying date each year at Millgrove
Year	First date	Last date
1954	1954-06-10	1954-09-05
1955	1955-06-17	1955-09-19
1956	1956-06-11	1956-07-27
1958	1958-07-02	1958-08-12
1959	1959-06-08	1959-09-09
1960	1960-07-09	1960-09-08
1961	1961-06-12	1961-09-11
1964	1964-05-23	1964-09-08
1965	1965-05-26	1965-09-18
1966	1966-06-23	1966-09-02
1967	1967-06-14	1967-06-16
1968	1968-06-07	1968-08-24
1969	1969-05-29	1969-09-01
1971	1971-06-29	1971-10-02
1972	1972-07-12	1972-07-23
1973	1973-06-11	1973-09-04
1976	1976-06-09	1976-07-11
1977	1977-05-17	1977-09-01
1981	1981-06-15	1981-07-13
1982	1982-07-15	1982-07-18

Every Fixed Threshold

Fixed thresholds at Millgrove
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	20	33	1955	3
35 C (95 F): Days	3	5	1955	1
90 F (32.2 C): Days	15	20	1955	2
0 C (32 F): Ice days (max	21	87	1960	61
0 C (32 F): Frost days (min	21	168	1956	142
-10 C (14 F): Days with min	21	62	1970	53
-20 C (-4 F): Days with min	20	13	1968	9
-30 C (-22 F): Days with min	1	1	1976	1
20 C (68 F): Tropical nights (min	19	13	1955	2
10 mm (0.39 in): Days with 10 mm or more rain	22	39	1982	39
25 mm (0.98 in): Days with 25 mm or more rain	22	10	1956	3
50 mm (1.97 in): Days with 50 mm or more rain	14	2	1956	1
100 mm (3.94 in): Days with 100 mm or more rain	1	1	1976	1
10 cm (3.9 in): Days with 10 cm or more snowfall	23	8	1965	5
25 cm (9.8 in): Days with 25 cm or more snowfall	5	1	1958	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1954.

Download the Data

Data for Millgrove 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2026-10-16. Last revised 16 October 2026 (2026-10-16).

Millgrove Threshold Days by Year

Key Facts for Millgrove Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related