Dewar Lakes Threshold Days by Year (CA002401030)

10 fixed thresholds counted per year at Dewar Lakes (CA002401030): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Dewar Lakes Thresholds

Dewar Lakes: nights with a minimum temperature at or below 0 C (32 F) in 25 years, most in 1972 with 344.
Dewar Lakes: nights with a minimum temperature at or below -10 C (14 F) in 25 years, most in 1978 with 256.
Dewar Lakes: nights with a minimum temperature at or below -20 C (-4 F) in 25 years, most in 1972 with 176.
Dewar Lakes: nights with a minimum temperature at or below -30 C (-22 F) in 25 years, most in 1972 with 99.
10 fixed thresholds have at least one qualifying day at Dewar Lakes.

Nights at or below 0 C (32 F)

25 years with a qualifying day

Days per year at Dewar Lakes with nights with a minimum temperature at or below 0 C (32 F), with the decade average as a line. The most was 344 in 1972.

Nights at or below 0 C (32 F) per year at Dewar Lakes
Year	Days	Decade average
1959	299	299
1960	297	317.3
1961	315	317.3
1962	306	317.3
1963	326	317.3
1964	331	317.3
1965	324	317.3
1966	299	317.3
1967	329	317.3
1968	334	317.3
1969	312	317.3
1970	343	323.4
1971	313	323.4
1972	344	323.4
1973	310	323.4
1974	318	323.4
1975	288	323.4
1976	344	323.4
1977	302	323.4
1978	340	323.4
1979	332	323.4
1980	292	309
1981	311	309
1982	301	309
1983	332	309

For each year, a bar from the first to the last day at Dewar Lakes meeting 0 C (32 F).

First to last qualifying date each year at Dewar Lakes
Year	First date	Last date
1959	1959-01-01	1959-12-31
1960	1960-01-01	1960-12-31
1961	1961-01-01	1961-12-31
1962	1962-01-01	1962-12-31
1963	1963-01-01	1963-12-31
1964	1964-01-01	1964-12-31
1965	1965-01-01	1965-12-31
1966	1966-01-01	1966-12-31
1967	1967-01-01	1967-12-31
1968	1968-01-01	1968-12-31
1969	1969-01-01	1969-12-31
1970	1970-01-01	1970-12-31
1971	1971-01-01	1971-12-31
1972	1972-01-01	1972-12-31
1973	1973-01-01	1973-12-31
1974	1974-01-01	1974-12-31
1975	1975-01-01	1975-12-31
1976	1976-01-01	1976-12-31
1977	1977-01-01	1977-12-31
1978	1978-01-01	1978-12-31
1979	1979-01-01	1979-12-31
1980	1980-01-01	1980-12-31
1981	1981-01-01	1981-12-31
1982	1982-01-01	1982-12-31
1983	1983-01-01	1983-12-31

Every Fixed Threshold

Fixed thresholds at Dewar Lakes
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
0 C (32 F): Ice days (max	24	297	1972	263
0 C (32 F): Frost days (min	25	344	1972	332
-10 C (14 F): Days with min	25	256	1978	228
-20 C (-4 F): Days with min	25	176	1972	172
-30 C (-22 F): Days with min	25	99	1972	111
-40 C (-40 F): Days with min	24	33	1964	17
10 mm (0.39 in): Days with 10 mm or more rain	24	13	1975	2
25 mm (0.98 in): Days with 25 mm or more rain	7	3	1964	1
10 cm (3.9 in): Days with 10 cm or more snowfall	17	4	1959	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1975	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1959.

Download the Data

Data for Dewar Lakes 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).

Dewar Lakes Threshold Days by Year (CA002401030)

Key Facts for Dewar Lakes Thresholds

Nights at or below 0 C (32 F)

Every Fixed Threshold

Download the Data

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