Dawson Threshold Days by Year (USC00092570)

12 fixed thresholds counted per year at Dawson (USC00092570): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Dawson Thresholds

Dawson: days with 10 mm (0.39 in) or more of precipitation in 56 years, most in 1964 with 59.
Dawson: days with 25 mm (0.98 in) or more of precipitation in 56 years, most in 1964 with 26.
Dawson: days with 50 mm (1.97 in) or more of precipitation in 54 years, most in 1964 with 11.
Dawson: days with 100 mm (3.94 in) or more of precipitation in 15 years, most in 1972 with 2.
12 fixed thresholds have at least one qualifying day at Dawson.

Days with 10 mm (0.39 in) or more of precipitation

56 years with a qualifying day

Days per year at Dawson with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 59 in 1964.

Days with 10 mm (0.39 in) or more of precipitation per year at Dawson
Year	Days	Decade average
1904	43	41.3
1905	42	41.3
1906	39	41.3
1942	45	39
1943	26	39
1949	46	39
1950	34	37
1951	35	37
1952	39	37
1953	48	37
1954	23	37
1955	28	37
1956	35	37
1957	41	37
1958	44	37
1959	43	37
1960	38	37
1961	37	37
1962	34	37
1963	32	37
1964	59	37
1965	38	37
1966	37	37
1967	31	37
1968	32	37
1969	32	37
1970	44	43.2
1971	41	43.2
1972	35	43.2
1973	41	43.2
1974	42	43.2
1975	52	43.2
1976	45	43.2
1977	43	43.2
1978	43	43.2
1979	46	43.2
1980	37	37.5
1981	29	37.5
1982	42	37.5
1983	51	37.5
1984	38	37.5
1985	40	37.5
1986	30	37.5
1987	38	37.5
1988	27	37.5
1989	43	37.5
1990	32	40
1991	47	40
1998	42	40
1999	39	40
2000	37	35.7
2003	44	35.7
2006	31	35.7
2007	25	35.7
2008	38	35.7
2009	39	35.7

For each year, a bar from the first to the last day at Dawson meeting 10 mm (0.39 in).

First to last qualifying date each year at Dawson
Year	First date	Last date
1904	1904-01-07	1904-12-27
1905	1905-01-06	1905-12-28
1906	1906-01-03	1906-11-15
1942	1942-01-01	1942-12-29
1943	1943-01-07	1943-12-26
1949	1949-01-06	1949-12-15
1950	1950-02-11	1950-12-30
1951	1951-01-07	1951-12-27
1952	1952-01-23	1952-12-31
1953	1953-01-09	1953-12-31
1954	1954-03-01	1954-12-13
1955	1955-01-11	1955-10-17
1956	1956-01-23	1956-12-24
1957	1957-01-23	1957-12-21
1958	1958-01-07	1958-12-28
1959	1959-01-01	1959-12-18
1960	1960-01-03	1960-12-21
1961	1961-01-01	1961-12-15
1962	1962-01-01	1962-12-29
1963	1963-01-12	1963-12-31
1964	1964-01-01	1964-12-26
1965	1965-01-24	1965-12-19
1966	1966-01-05	1966-12-31
1967	1967-01-01	1967-12-28
1968	1968-01-02	1968-12-31
1969	1969-01-20	1969-12-26
1970	1970-01-01	1970-12-31
1971	1971-01-05	1971-12-21
1972	1972-01-03	1972-12-22
1973	1973-01-01	1973-12-27
1974	1974-01-01	1974-12-21
1975	1975-01-08	1975-12-31
1976	1976-02-22	1976-12-26
1977	1977-01-03	1977-12-25
1978	1978-01-09	1978-12-25
1979	1979-01-02	1979-12-25
1980	1980-01-09	1980-11-24
1981	1981-01-07	1981-12-31
1982	1982-01-03	1982-12-30
1983	1983-01-01	1983-12-28
1984	1984-01-11	1984-12-05
1985	1985-01-03	1985-12-31
1986	1986-01-10	1986-12-31
1987	1987-01-04	1987-12-22
1988	1988-01-02	1988-12-11
1989	1989-01-10	1989-12-19
1990	1990-01-04	1990-12-23
1991	1991-01-01	1991-12-29
1998	1998-01-05	1998-12-25
1999	1999-01-02	1999-12-21
2000	2000-01-09	2000-12-29
2003	2003-01-30	2003-12-13
2006	2006-01-02	2006-12-31
2007	2007-01-06	2007-11-30
2008	2008-01-17	2008-12-12
2009	2009-01-03	2009-11-22

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	1	138	1904	138
35 C (95 F): Days	1	44	1904	44
90 F (32.2 C): Days	1	104	1904	104
0 C (32 F): Frost days (min	1	36	1904	36
20 C (68 F): Tropical nights (min	1	66	1904	66
25 C (77 F): Days with min	1	3	1904	3
10 mm (0.39 in): Days with 10 mm or more rain	56	59	1964	39
25 mm (0.98 in): Days with 25 mm or more rain	56	26	1964	24
50 mm (1.97 in): Days with 50 mm or more rain	54	11	1964	7
100 mm (3.94 in): Days with 100 mm or more rain	15	2	1972	2
200 mm (7.87 in): Days with 200 mm or more rain	1	1	2008	1
10 cm (3.9 in): Days with 10 cm or more snowfall	1	1	1973	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1904.

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 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Dawson Threshold Days by Year (USC00092570)

Key Facts for Dawson Thresholds

Days with 10 mm (0.39 in) or more of precipitation

Every Fixed Threshold

Download the Data

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