Sprague Threshold Days by Year (USC00457956)

16 fixed thresholds counted per year at Sprague (USC00457956): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Sprague Thresholds

Sprague: days with 10 mm (0.39 in) or more of precipitation in 52 years, most in 1901 with 19.
Sprague: nights with a minimum temperature at or below 0 C (32 F) in 38 years, most in 1970 with 186.
Sprague: nights with a minimum temperature at or below -10 C (14 F) in 37 years, most in 1949 with 41.
Sprague: days with a maximum temperature at or above 30 C (86 F) in 36 years, most in 1958 with 74.
16 fixed thresholds have at least one qualifying day at Sprague.

Days at or above 30 C (86 F)

36 years with a qualifying day

Days per year at Sprague with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 74 in 1958.

Days at or above 30 C (86 F) per year at Sprague
Year	Days	Decade average
1933	41	54
1934	67	54
1940	57	50.9
1941	47	50.9
1942	54	50.9
1943	55	50.9
1944	52	50.9
1946	46	50.9
1947	44	50.9
1949	52	50.9
1950	55	52.3
1951	51	52.3
1952	55	52.3
1955	47	52.3
1956	54	52.3
1958	74	52.3
1959	30	52.3
1960	45	47.9
1961	69	47.9
1962	42	47.9
1963	43	47.9
1964	38	47.9
1965	36	47.9
1966	43	47.9
1967	73	47.9
1968	40	47.9
1969	50	47.9
1970	58	41.8
1971	47	41.8
1972	46	41.8
1973	50	41.8
1976	17	41.8
1977	42	41.8
1978	32	41.8
1979	42	41.8
1980	24	24

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

First to last qualifying date each year at Sprague
Year	First date	Last date
1933	1933-05-25	1933-09-14
1934	1934-04-21	1934-10-11
1940	1940-05-22	1940-09-11
1941	1941-05-11	1941-08-22
1942	1942-06-29	1942-09-26
1943	1943-06-28	1943-10-08
1944	1944-05-27	1944-09-24
1946	1946-04-25	1946-09-11
1947	1947-05-06	1947-09-24
1949	1949-05-09	1949-09-27
1950	1950-06-20	1950-09-22
1951	1951-05-22	1951-09-18
1952	1952-06-04	1952-09-26
1955	1955-06-09	1955-09-10
1956	1956-05-15	1956-09-18
1958	1958-05-18	1958-09-10
1959	1959-06-02	1959-09-12
1960	1960-06-01	1960-09-14
1961	1961-05-25	1961-08-29
1962	1962-06-23	1962-09-25
1963	1963-05-29	1963-09-28
1964	1964-05-16	1964-08-23
1965	1965-06-10	1965-08-19
1966	1966-05-04	1966-09-23
1967	1967-06-16	1967-09-29
1968	1968-05-20	1968-09-10
1969	1969-05-11	1969-09-13
1970	1970-05-05	1970-10-04
1971	1971-05-12	1971-09-11
1972	1972-05-29	1972-09-05
1973	1973-05-14	1973-09-12
1976	1976-06-29	1976-09-02
1977	1977-04-24	1977-08-22
1978	1978-06-04	1978-08-11
1979	1979-06-03	1979-09-16
1980	1980-07-08	1980-10-07

Every Fixed Threshold

Fixed thresholds at Sprague
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	36	74	1958	24
35 C (95 F): Days	35	26	1961	5
40 C (104 F): Days	7	2	1934	1
90 F (32.2 C): Days	36	53	1961	11
100 F (37.8 C): Days	32	8	1961	1
110 F (43.3 C): Days	1	1	1961	1
0 C (32 F): Ice days (max	36	50	1977	29
0 C (32 F): Frost days (min	38	186	1970	168
-10 C (14 F): Days with min	37	41	1949	23
-20 C (-4 F): Days with min	24	21	1949	7
-30 C (-22 F): Days with min	2	8	1950	2
20 C (68 F): Tropical nights (min	7	2	1941	1
10 mm (0.39 in): Days with 10 mm or more rain	52	19	1901	11
25 mm (0.98 in): Days with 25 mm or more rain	15	4	1901	1
50 mm (1.97 in): Days with 50 mm or more rain	1	1	1901	1
10 cm (3.9 in): Days with 10 cm or more snowfall	20	5	1959	4

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1933.

Download the Data

Data for Sprague 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).

Sprague Threshold Days by Year (USC00457956)

Key Facts for Sprague Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related