Deloraine Threshold Days by Year

17 fixed thresholds counted per year at Deloraine (CA005010760): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Deloraine Thresholds

Deloraine: days with 10 mm (0.39 in) or more of precipitation in 33 years, most in 1975 with 22.
Deloraine: days with 10 cm (3.9 in) or more of snowfall in 30 years, most in 1916 with 8.
Deloraine: days with 25 mm (0.98 in) or more of precipitation in 28 years, most in 1954 with 5.
Deloraine: days with a maximum temperature at or above 30 C (86 F) in 24 years, most in 1983 with 39.
17 fixed thresholds have at least one qualifying day at Deloraine.

Days at or above 30 C (86 F)

24 years with a qualifying day

Days per year at Deloraine with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 39 in 1983.

Days at or above 30 C (86 F) per year at Deloraine
Year	Days	Decade average
1954	5	15
1955	19	15
1956	10	15
1957	20	15
1959	21	15
1964	8	18.2
1966	24	18.2
1967	29	18.2
1968	8	18.2
1969	22	18.2
1970	28	16
1971	11	16
1972	14	16
1973	19	16
1974	12	16
1975	14	16
1976	15	16
1977	8	16
1978	22	16
1979	17	16
1980	30	25.8
1981	22	25.8
1982	12	25.8
1983	39	25.8

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

First to last qualifying date each year at Deloraine
Year	First date	Last date
1954	1954-06-23	1954-08-31
1955	1955-06-15	1955-09-02
1956	1956-05-21	1956-09-26
1957	1957-07-06	1957-08-10
1959	1959-05-24	1959-09-13
1964	1964-05-20	1964-09-17
1966	1966-05-21	1966-09-11
1967	1967-06-27	1967-09-11
1968	1968-06-02	1968-07-12
1969	1969-05-26	1969-09-13
1970	1970-06-05	1970-09-05
1971	1971-08-05	1971-09-02
1972	1972-05-16	1972-08-30
1973	1973-06-01	1973-08-31
1974	1974-06-19	1974-08-07
1975	1975-06-24	1975-07-30
1976	1976-06-02	1976-09-17
1977	1977-05-09	1977-07-04
1978	1978-06-09	1978-09-10
1979	1979-05-16	1979-09-16
1980	1980-04-20	1980-09-07
1981	1981-06-27	1981-09-18
1982	1982-07-02	1982-09-10
1983	1983-06-10	1983-09-02

Every Fixed Threshold

Fixed thresholds at Deloraine
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	24	39	1983	39
35 C (95 F): Days	15	7	1978	5
90 F (32.2 C): Days	24	18	1983	18
100 F (37.8 C): Days	3	1	1976	1
0 C (32 F): Ice days (max	24	135	1955	105
0 C (32 F): Frost days (min	24	209	1959	202
-10 C (14 F): Days with min	24	135	1955	92
-20 C (-4 F): Days with min	24	88	1955	41
-30 C (-22 F): Days with min	24	29	1982	12
-40 C (-40 F): Days with min	4	3	1966	2
20 C (68 F): Tropical nights (min	14	11	1983	11
25 C (77 F): Days with min	1	1	1983	1
10 mm (0.39 in): Days with 10 mm or more rain	33	22	1975	6
25 mm (0.98 in): Days with 25 mm or more rain	28	5	1954	2
50 mm (1.97 in): Days with 50 mm or more rain	6	2	1968	1
10 cm (3.9 in): Days with 10 cm or more snowfall	30	8	1916	1
25 cm (9.8 in): Days with 25 cm or more snowfall	6	4	1916	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 Deloraine 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).

Deloraine Threshold Days by Year

Key Facts for Deloraine Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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