Boswell Threshold Days by Year

7 fixed thresholds counted per year at Boswell (USC00360821): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Boswell Thresholds

Boswell: days with 10 mm (0.39 in) or more of precipitation in 44 years, most in 2004 with 49.
Boswell: days with 25 mm (0.98 in) or more of precipitation in 44 years, most in 1979 with 15.
Boswell: days with 10 cm (3.9 in) or more of snowfall in 40 years, most in 1978 with 8.
Boswell: days with 50 mm (1.97 in) or more of precipitation in 20 years, most in 2004 with 4.
7 fixed thresholds have at least one qualifying day at Boswell.

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

44 years with a qualifying day

Days per year at Boswell with 10 mm (0.39 in) or more of precipitation, with the decade average as a line. The most was 49 in 2004.

Days with 10 mm (0.39 in) or more of precipitation per year at Boswell
Year	Days	Decade average
1961	43	32.4
1962	42	32.4
1963	30	32.4
1964	34	32.4
1965	22	32.4
1966	23	32.4
1967	37	32.4
1968	29	32.4
1969	32	32.4
1970	48	39.2
1971	45	39.2
1972	35	39.2
1973	32	39.2
1974	40	39.2
1975	48	39.2
1976	32	39.2
1977	35	39.2
1978	36	39.2
1979	41	39.2
1980	39	34.7
1981	27	34.7
1982	22	34.7
1983	33	34.7
1984	35	34.7
1985	37	34.7
1986	37	34.7
1987	36	34.7
1988	37	34.7
1989	44	34.7
1990	35	33.5
1997	32	33.5
2000	31	37.3
2001	23	37.3
2002	37	37.3
2003	39	37.3
2004	49	37.3
2005	34	37.3
2007	43	37.3
2008	45	37.3
2009	35	37.3
2010	40	37.8
2012	41	37.8
2013	40	37.8
2014	30	37.8

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

First to last qualifying date each year at Boswell
Year	First date	Last date
1961	1961-01-01	1961-12-20
1962	1962-01-07	1962-12-22
1963	1963-02-03	1963-12-24
1964	1964-01-13	1964-12-27
1965	1965-01-02	1965-11-17
1966	1966-01-23	1966-12-29
1967	1967-02-28	1967-12-29
1968	1968-03-01	1968-12-04
1969	1969-01-30	1969-12-31
1970	1970-01-21	1970-12-24
1971	1971-01-01	1971-12-07
1972	1972-01-02	1972-12-22
1973	1973-01-04	1973-12-09
1974	1974-01-04	1974-12-16
1975	1975-01-01	1975-12-26
1976	1976-01-01	1976-12-07
1977	1977-03-04	1977-12-07
1978	1978-01-09	1978-12-25
1979	1979-01-02	1979-12-26
1980	1980-02-16	1980-12-25
1981	1981-04-13	1981-11-06
1982	1982-01-23	1982-11-29
1983	1983-02-12	1983-12-22
1984	1984-02-15	1984-12-28
1985	1985-02-02	1985-11-28
1986	1986-01-20	1986-12-25
1987	1987-01-20	1987-12-29
1988	1988-01-20	1988-12-25
1989	1989-01-12	1989-12-16
1990	1990-01-21	1990-12-28
1997	1997-02-17	1997-12-30
2000	2000-01-20	2000-12-14
2001	2001-01-21	2001-12-18
2002	2002-01-07	2002-12-15
2003	2003-01-02	2003-12-24
2004	2004-01-05	2004-12-12
2005	2005-01-04	2005-12-26
2007	2007-01-02	2007-12-29
2008	2008-01-11	2008-12-27
2009	2009-01-07	2009-12-26
2010	2010-01-18	2010-12-01
2012	2012-01-12	2012-12-27
2013	2013-01-29	2013-12-30
2014	2014-02-05	2014-12-17

Every Fixed Threshold

Fixed thresholds at Boswell
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	44	49	2004	30
25 mm (0.98 in): Days with 25 mm or more rain	44	15	1979	3
50 mm (1.97 in): Days with 50 mm or more rain	20	4	2004	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	2004	1
10 cm (3.9 in): Days with 10 cm or more snowfall	40	8	1978	6
25 cm (9.8 in): Days with 25 cm or more snowfall	12	3	2010	3
50 cm (19.7 in): Days with 50 cm or more snowfall	1	2	2010	2

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1961.

Download the Data

Data for Boswell 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 2026-10-13 (13 October 2026). Threshold counts are computed by this site.

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

Boswell Threshold Days by Year

Key Facts for Boswell Thresholds

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

Every Fixed Threshold

Download the Data

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