Dawson Threshold Days by Year (CA002100400)

14 fixed thresholds counted per year at Dawson (CA002100400): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Dawson Thresholds

Dawson: nights with a minimum temperature at or below 0 C (32 F) in 76 years, most in 1920 with 262.
Dawson: nights with a minimum temperature at or below -10 C (14 F) in 76 years, most in 1972 with 192.
Dawson: nights with a minimum temperature at or below -20 C (-4 F) in 76 years, most in 1919 with 140.
Dawson: nights with a minimum temperature at or below -30 C (-22 F) in 76 years, most in 1932 with 89.
14 fixed thresholds have at least one qualifying day at Dawson.

Days at or above 30 C (86 F)

36 years with a qualifying day

Days per year at Dawson with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 8 in 1916.

Days at or above 30 C (86 F) per year at Dawson
Year	Days	Decade average
1903	5	2
1905	1	2
1906	1	2
1907	2	2
1909	1	2
1910	1	4.2
1915	6	4.2
1916	8	4.2
1918	4	4.2
1919	2	4.2
1920	3	2.8
1921	2	2.8
1923	3	2.8
1925	3	2.8
1933	2	3
1936	3	3
1937	6	3
1939	1	3
1940	4	2.8
1942	5	2.8
1946	4	2.8
1947	1	2.8
1948	2	2.8
1949	1	2.8
1950	3	3.3
1951	2	3.3
1955	4	3.3
1958	4	3.3
1960	1	2.3
1961	2	2.3
1967	2	2.3
1969	4	2.3
1972	5	4.8
1975	4	4.8
1976	4	4.8
1977	6	4.8

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

First to last qualifying date each year at Dawson
Year	First date	Last date
1903	1903-06-17	1903-08-03
1905	1905-06-24	1905-06-24
1906	1906-06-04	1906-06-04
1907	1907-06-27	1907-07-31
1909	1909-06-30	1909-06-30
1910	1910-07-29	1910-07-29
1915	1915-06-25	1915-07-22
1916	1916-06-22	1916-06-30
1918	1918-07-14	1918-07-17
1919	1919-07-27	1919-07-28
1920	1920-07-06	1920-07-10
1921	1921-07-11	1921-08-06
1923	1923-06-06	1923-07-28
1925	1925-07-23	1925-07-25
1933	1933-06-22	1933-06-23
1936	1936-06-01	1936-06-03
1937	1937-06-08	1937-06-19
1939	1939-07-20	1939-07-20
1940	1940-07-11	1940-07-17
1942	1942-06-18	1942-08-02
1946	1946-06-09	1946-07-12
1947	1947-07-17	1947-07-17
1948	1948-06-18	1948-07-18
1949	1949-07-09	1949-07-09
1950	1950-06-17	1950-06-19
1951	1951-07-09	1951-07-16
1955	1955-07-24	1955-07-27
1958	1958-06-05	1958-07-05
1960	1960-05-24	1960-05-24
1961	1961-07-26	1961-07-27
1967	1967-06-18	1967-06-20
1969	1969-06-13	1969-06-16
1972	1972-06-12	1972-07-11
1975	1975-06-29	1975-07-12
1976	1976-07-30	1976-08-05
1977	1977-07-28	1977-08-20

Every Fixed Threshold

Fixed thresholds at Dawson
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	36	8	1916	6
35 C (95 F): Days	1	1	1950	1
90 F (32.2 C): Days	11	2	1923	2
0 C (32 F): Ice days (max	74	188	1961	136
0 C (32 F): Frost days (min	76	262	1920	205
-10 C (14 F): Days with min	76	192	1972	126
-20 C (-4 F): Days with min	76	140	1919	77
-30 C (-22 F): Days with min	76	89	1932	25
-40 C (-40 F): Days with min	75	51	1909	10
10 mm (0.39 in): Days with 10 mm or more rain	71	12	1907	3
25 mm (0.98 in): Days with 25 mm or more rain	17	2	1958	1
50 mm (1.97 in): Days with 50 mm or more rain	3	1	1936	1
10 cm (3.9 in): Days with 10 cm or more snowfall	54	8	1907	1
25 cm (9.8 in): Days with 25 cm or more snowfall	4	1	1907	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1903.

Download the Data

Data for Dawson 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).

Dawson Threshold Days by Year (CA002100400)

Key Facts for Dawson Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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