Ottawa Nrc Threshold Days by Year (CA006106090)

14 fixed thresholds counted per year at Ottawa Nrc (CA006106090): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Ottawa Nrc Thresholds

Ottawa Nrc: days with a maximum temperature at or above 30 C (86 F) in 32 years, most in 1955 with 39.
Ottawa Nrc: days with a maximum temperature at or below 0 C (32 F) in 32 years, most in 1955 with 105.
Ottawa Nrc: nights with a minimum temperature at or below 0 C (32 F) in 32 years, most in 1972 with 179.
Ottawa Nrc: nights with a minimum temperature at or below -10 C (14 F) in 32 years, most in 1978 with 88.
14 fixed thresholds have at least one qualifying day at Ottawa Nrc.

Days at or above 30 C (86 F)

32 years with a qualifying day

Days per year at Ottawa Nrc with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 39 in 1955.

Days at or above 30 C (86 F) per year at Ottawa Nrc
Year	Days	Decade average
1952	16	15.8
1953	19	15.8
1954	3	15.8
1955	39	15.8
1956	4	15.8
1957	14	15.8
1958	7	15.8
1959	24	15.8
1960	12	10.5
1961	7	10.5
1962	8	10.5
1963	18	10.5
1964	13	10.5
1965	8	10.5
1966	15	10.5
1967	7	10.5
1968	6	10.5
1969	11	10.5
1970	19	11.4
1971	9	11.4
1972	3	11.4
1973	12	11.4
1974	6	11.4
1975	24	11.4
1976	7	11.4
1977	12	11.4
1978	11	11.4
1979	11	11.4
1980	5	10
1981	7	10
1982	6	10
1983	22	10

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

First to last qualifying date each year at Ottawa Nrc
Year	First date	Last date
1952	1952-06-17	1952-09-13
1953	1953-05-10	1953-09-04
1954	1954-07-13	1954-08-25
1955	1955-06-04	1955-09-18
1956	1956-06-12	1956-06-15
1957	1957-06-15	1957-08-09
1958	1958-07-01	1958-08-07
1959	1959-06-08	1959-09-10
1960	1960-07-10	1960-09-08
1961	1961-06-29	1961-09-14
1962	1962-05-17	1962-08-31
1963	1963-06-04	1963-07-28
1964	1964-05-23	1964-08-07
1965	1965-05-26	1965-09-22
1966	1966-06-23	1966-08-09
1967	1967-06-02	1967-08-17
1968	1968-07-14	1968-07-22
1969	1969-06-12	1969-08-31
1970	1970-06-02	1970-08-16
1971	1971-05-19	1971-08-19
1972	1972-07-12	1972-07-21
1973	1973-07-07	1973-09-05
1974	1974-06-10	1974-08-22
1975	1975-05-20	1975-08-10
1976	1976-04-18	1976-08-21
1977	1977-05-17	1977-09-01
1978	1978-05-27	1978-08-15
1979	1979-05-09	1979-07-25
1980	1980-06-24	1980-08-25
1981	1981-06-16	1981-08-02
1982	1982-07-07	1982-07-22
1983	1983-06-12	1983-09-20

Every Fixed Threshold

Fixed thresholds at Ottawa Nrc
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	32	39	1955	22
35 C (95 F): Days	5	5	1955	1
90 F (32.2 C): Days	24	22	1955	3
0 C (32 F): Ice days (max	32	105	1955	73
0 C (32 F): Frost days (min	32	179	1972	163
-10 C (14 F): Days with min	32	88	1978	59
-20 C (-4 F): Days with min	32	35	1976	17
-30 C (-22 F): Days with min	15	3	1968	1
20 C (68 F): Tropical nights (min	32	21	1955	9
10 mm (0.39 in): Days with 10 mm or more rain	30	36	1977	28
25 mm (0.98 in): Days with 25 mm or more rain	30	8	1972	7
50 mm (1.97 in): Days with 50 mm or more rain	7	2	1952	1
10 cm (3.9 in): Days with 10 cm or more snowfall	32	14	1970	2
25 cm (9.8 in): Days with 25 cm or more snowfall	7	3	1977	3

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1952.

Download the Data

Data for Ottawa Nrc 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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Ottawa Nrc Threshold Days by Year (CA006106090)

Key Facts for Ottawa Nrc Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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