Stilwell Threshold Days by Year

6 fixed thresholds counted per year at Stilwell (USC00147809): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Stilwell Thresholds

Stilwell: days with 10 mm (0.39 in) or more of precipitation in 58 years, most in 1973 with 55.
Stilwell: days with 25 mm (0.98 in) or more of precipitation in 58 years, most in 2008 with 22.
Stilwell: days with 50 mm (1.97 in) or more of precipitation in 55 years, most in 1973 with 9.
Stilwell: days with 10 cm (3.9 in) or more of snowfall in 37 years, most in 1960 with 8.
6 fixed thresholds have at least one qualifying day at Stilwell.

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

58 years with a qualifying day

Days per year at Stilwell with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 55 in 1973.

Days with 10 mm (0.39 in) or more of precipitation per year at Stilwell
Year	Days	Decade average
1940	38	40.5
1949	43	40.5
1950	25	29.9
1951	46	29.9
1952	25	29.9
1953	21	29.9
1956	23	29.9
1957	32	29.9
1958	41	29.9
1959	26	29.9
1960	32	32.3
1961	37	32.3
1963	27	32.3
1964	36	32.3
1965	30	32.3
1966	19	32.3
1967	41	32.3
1969	36	32.3
1970	31	32.6
1971	29	32.6
1972	26	32.6
1973	55	32.6
1974	32	32.6
1975	30	32.6
1976	22	32.6
1977	33	32.6
1978	32	32.6
1979	36	32.6
1980	20	34.3
1981	40	34.3
1982	36	34.3
1983	38	34.3
1984	33	34.3
1985	41	34.3
1986	37	34.3
1987	41	34.3
1988	24	34.3
1989	33	34.3
1990	37	35.2
1991	24	35.2
1992	41	35.2
1993	48	35.2
1994	31	35.2
1995	28	35.2
1996	32	35.2
1997	36	35.2
1998	38	35.2
1999	37	35.2
2000	24	32.8
2001	35	32.8
2002	28	32.8
2003	30	32.8
2004	39	32.8
2005	28	32.8
2006	34	32.8
2007	37	32.8
2008	40	32.8
2009	33	32.8

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

First to last qualifying date each year at Stilwell
Year	First date	Last date
1940	1940-01-14	1940-12-15
1949	1949-01-04	1949-12-31
1950	1950-01-13	1950-09-21
1951	1951-01-03	1951-12-14
1952	1952-03-02	1952-12-19
1953	1953-02-11	1953-12-22
1956	1956-01-30	1956-12-08
1957	1957-03-24	1957-12-25
1958	1958-01-21	1958-11-28
1959	1959-01-21	1959-12-27
1960	1960-01-15	1960-12-11
1961	1961-02-18	1961-11-22
1963	1963-03-04	1963-11-22
1964	1964-01-13	1964-12-25
1965	1965-01-02	1965-12-25
1966	1966-02-01	1966-11-05
1967	1967-01-25	1967-11-03
1969	1969-01-16	1969-10-30
1970	1970-04-01	1970-12-11
1971	1971-01-03	1971-12-30
1972	1972-03-15	1972-11-13
1973	1973-01-03	1973-12-24
1974	1974-03-10	1974-12-31
1975	1975-01-31	1975-12-15
1976	1976-03-04	1976-11-27
1977	1977-03-12	1977-10-31
1978	1978-02-13	1978-12-31
1979	1979-01-01	1979-11-21
1980	1980-01-19	1980-12-08
1981	1981-03-18	1981-12-23
1982	1982-01-04	1982-12-28
1983	1983-01-26	1983-12-21
1984	1984-02-27	1984-12-29
1985	1985-01-01	1985-12-01
1986	1986-02-03	1986-12-07
1987	1987-01-09	1987-12-26
1988	1988-01-19	1988-12-27
1989	1989-01-26	1989-10-30
1990	1990-01-17	1990-12-29
1991	1991-01-16	1991-12-20
1992	1992-02-14	1992-12-15
1993	1993-01-04	1993-12-13
1994	1994-02-20	1994-12-07
1995	1995-01-28	1995-12-19
1996	1996-01-18	1996-12-01
1997	1997-01-28	1997-12-25
1998	1998-01-04	1998-12-07
1999	1999-01-02	1999-12-09
2000	2000-02-18	2000-11-09
2001	2001-01-28	2001-12-13
2002	2002-01-30	2002-10-24
2003	2003-02-14	2003-12-28
2004	2004-01-17	2004-12-06
2005	2005-01-03	2005-12-08
2006	2006-01-11	2006-12-30
2007	2007-01-13	2007-12-15
2008	2008-01-08	2008-12-27
2009	2009-02-11	2009-12-23

Every Fixed Threshold

Fixed thresholds at Stilwell
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
10 mm (0.39 in): Days with 10 mm or more rain	58	55	1973	33
25 mm (0.98 in): Days with 25 mm or more rain	58	22	2008	14
50 mm (1.97 in): Days with 50 mm or more rain	55	9	1973	2
100 mm (3.94 in): Days with 100 mm or more rain	20	2	1957	1
10 cm (3.9 in): Days with 10 cm or more snowfall	37	8	1960	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1978	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1940.

Download the Data

Data for Stilwell 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 2026-10-16 (16 October 2026). Threshold counts are computed by this site.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).

Stilwell Threshold Days by Year

Key Facts for Stilwell Thresholds

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

Every Fixed Threshold

Download the Data

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