Richmond Hill Threshold Days by Year

14 fixed thresholds counted per year at Richmond Hill (CA006157012): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Richmond Hill Thresholds

Richmond Hill: days with a maximum temperature at or above 30 C (86 F) in 24 years, most in 1983 with 27.
Richmond Hill: days with a maximum temperature at or below 0 C (32 F) in 24 years, most in 1960 with 90.
Richmond Hill: nights with a minimum temperature at or below 0 C (32 F) in 24 years, most in 1976 with 166.
Richmond Hill: nights with a minimum temperature at or below -10 C (14 F) in 24 years, most in 1978 with 73.
14 fixed thresholds have at least one qualifying day at Richmond Hill.

Days at or above 30 C (86 F)

24 years with a qualifying day

Days per year at Richmond Hill with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 27 in 1983.

Days at or above 30 C (86 F) per year at Richmond Hill
Year	Days	Decade average
1960	5	12.6
1961	8	12.6
1962	13	12.6
1963	14	12.6
1964	21	12.6
1965	6	12.6
1966	21	12.6
1967	3	12.6
1968	15	12.6
1969	20	12.6
1970	17	13.5
1971	11	13.5
1972	8	13.5
1973	19	13.5
1974	11	13.5
1975	21	13.5
1976	9	13.5
1977	9	13.5
1978	19	13.5
1979	11	13.5
1980	11	13
1981	10	13
1982	4	13
1983	27	13

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

First to last qualifying date each year at Richmond Hill
Year	First date	Last date
1960	1960-07-12	1960-09-08
1961	1961-06-12	1961-09-11
1962	1962-05-15	1962-09-13
1963	1963-06-25	1963-07-28
1964	1964-05-22	1964-09-10
1965	1965-05-26	1965-08-15
1966	1966-06-23	1966-08-30
1967	1967-06-14	1967-06-16
1968	1968-06-06	1968-08-24
1969	1969-05-28	1969-09-13
1970	1970-06-08	1970-08-26
1971	1971-06-07	1971-09-08
1972	1972-07-12	1972-08-24
1973	1973-06-11	1973-09-05
1974	1974-07-04	1974-08-22
1975	1975-05-21	1975-08-12
1976	1976-06-08	1976-08-22
1977	1977-05-17	1977-09-01
1978	1978-05-26	1978-08-19
1979	1979-05-09	1979-08-04
1980	1980-05-22	1980-08-27
1981	1981-06-15	1981-07-18
1982	1982-07-07	1982-07-18
1983	1983-06-12	1983-09-10

Every Fixed Threshold

Fixed thresholds at Richmond Hill
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	24	27	1983	27
35 C (95 F): Days	3	2	1975	1
90 F (32.2 C): Days	18	12	1973	7
0 C (32 F): Ice days (max	24	90	1960	57
0 C (32 F): Frost days (min	24	166	1976	148
-10 C (14 F): Days with min	24	73	1978	37
-20 C (-4 F): Days with min	24	15	1963	5
-30 C (-22 F): Days with min	3	1	1976	1
20 C (68 F): Tropical nights (min	23	14	1983	14
10 mm (0.39 in): Days with 10 mm or more rain	24	36	1979	34
25 mm (0.98 in): Days with 25 mm or more rain	23	9	1977	2
50 mm (1.97 in): Days with 50 mm or more rain	4	2	1964	1
10 cm (3.9 in): Days with 10 cm or more snowfall	24	6	1971	2
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1977	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1960.

Download the Data

Data for Richmond Hill 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).

Richmond Hill Threshold Days by Year

Key Facts for Richmond Hill Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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