Williston Exp Farm Threshold Days by Year (USC00329430)

18 fixed thresholds counted per year at Williston Exp Farm (USC00329430): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Williston Exp Farm Thresholds

Williston Exp Farm: nights with a minimum temperature at or below 0 C (32 F) in 67 years, most in 2002 with 207.
Williston Exp Farm: nights with a minimum temperature at or below -10 C (14 F) in 67 years, most in 1978 with 113.
Williston Exp Farm: nights with a minimum temperature at or below -20 C (-4 F) in 67 years, most in 1978 with 61.
Williston Exp Farm: days with 10 mm (0.39 in) or more of precipitation in 67 years, most in 1982 with 16.
18 fixed thresholds have at least one qualifying day at Williston Exp Farm.

Days at or above 30 C (86 F)

66 years with a qualifying day

Days per year at Williston Exp Farm with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 74 in 1988.

Days at or above 30 C (86 F) per year at Williston Exp Farm
Year	Days	Decade average
1957	36	35
1958	34	35
1960	43	39.2
1961	62	39.2
1962	22	39.2
1963	35	39.2
1964	34	39.2
1965	15	39.2
1966	49	39.2
1967	55	39.2
1968	31	39.2
1969	46	39.2
1970	60	39.2
1971	40	39.2
1972	24	39.2
1973	46	39.2
1974	41	39.2
1975	27	39.2
1976	45	39.2
1977	35	39.2
1978	34	39.2
1979	40	39.2
1980	51	52.1
1981	54	52.1
1982	36	52.1
1983	64	52.1
1984	59	52.1
1985	38	52.1
1986	35	52.1
1987	50	52.1
1988	74	52.1
1989	60	52.1
1990	65	40.2
1991	43	40.2
1992	35	40.2
1993	8	40.2
1994	34	40.2
1995	41	40.2
1996	38	40.2
1997	45	40.2
1998	55	40.2
1999	38	40.2
2001	57	50
2002	40	50
2003	64	50
2004	26	50
2005	54	50
2006	65	50
2007	61	50
2008	49	50
2009	34	50
2010	37	45.6
2011	54	45.6
2012	63	45.6
2013	35	45.6
2014	37	45.6
2015	63	45.6
2016	45	45.6
2017	51	45.6
2018	40	45.6
2019	31	45.6
2020	55	47.4
2021	73	47.4
2023	40	47.4
2024	47	47.4
2026	22	47.4

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

First to last qualifying date each year at Williston Exp Farm
Year	First date	Last date
1957	1957-05-30	1957-10-03
1958	1958-05-11	1958-09-12
1960	1960-05-12	1960-09-05
1961	1961-05-29	1961-09-01
1962	1962-04-24	1962-08-25
1963	1963-05-30	1963-10-05
1964	1964-05-18	1964-09-18
1965	1965-07-15	1965-08-16
1966	1966-05-26	1966-09-20
1967	1967-06-27	1967-09-29
1968	1968-04-30	1968-09-14
1969	1969-05-26	1969-09-14
1970	1970-05-17	1970-09-05
1971	1971-06-18	1971-09-12
1972	1972-05-16	1972-09-19
1973	1973-05-31	1973-09-01
1974	1974-06-13	1974-08-19
1975	1975-06-24	1975-09-16
1976	1976-06-02	1976-09-18
1977	1977-04-26	1977-08-25
1978	1978-05-22	1978-09-11
1979	1979-05-16	1979-09-17
1980	1980-04-20	1980-09-08
1981	1981-05-20	1981-09-20
1982	1982-05-02	1982-09-10
1983	1983-05-26	1983-09-27
1984	1984-05-16	1984-09-18
1985	1985-05-03	1985-08-30
1986	1986-05-31	1986-08-31
1987	1987-04-28	1987-10-04
1988	1988-05-17	1988-09-17
1989	1989-04-22	1989-10-01
1990	1990-04-21	1990-09-26
1991	1991-05-21	1991-09-08
1992	1992-05-06	1992-10-02
1993	1993-05-13	1993-09-11
1994	1994-05-27	1994-09-19
1995	1995-06-01	1995-09-04
1996	1996-06-08	1996-09-01
1997	1997-05-31	1997-10-03
1998	1998-06-25	1998-09-18
1999	1999-05-28	1999-09-23
2001	2001-04-27	2001-09-29
2002	2002-06-26	2002-09-17
2003	2003-05-26	2003-10-08
2004	2004-06-06	2004-09-19
2005	2005-04-08	2005-10-02
2006	2006-05-18	2006-09-14
2007	2007-05-09	2007-09-23
2008	2008-05-19	2008-09-20
2009	2009-05-30	2009-09-25
2010	2010-06-24	2010-09-29
2011	2011-06-29	2011-10-06
2012	2012-04-23	2012-09-29
2013	2013-05-13	2013-09-17
2014	2014-05-23	2014-09-27
2015	2015-05-05	2015-09-27
2016	2016-05-04	2016-09-03
2017	2017-05-06	2017-09-12
2018	2018-05-16	2018-09-08
2019	2019-06-03	2019-09-17
2020	2020-05-20	2020-09-25
2021	2021-05-18	2021-10-07
2023	2023-06-04	2023-10-18
2024	2024-07-09	2024-09-30
2026	2026-05-25	2026-07-26

Every Fixed Threshold

Fixed thresholds at Williston Exp Farm
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	66	74	1988	22
35 C (95 F): Days	63	38	1988	7
40 C (104 F): Days	12	10	1988	2
90 F (32.2 C): Days	66	56	1988	18
100 F (37.8 C): Days	41	20	1988	3
0 C (32 F): Ice days (max	66	107	1978	30
0 C (32 F): Frost days (min	67	207	2002	105
-10 C (14 F): Days with min	67	113	1978	35
-20 C (-4 F): Days with min	67	61	1978	11
-30 C (-22 F): Days with min	58	20	1982	4
-40 C (-40 F): Days with min	2	1	1962	1
20 C (68 F): Tropical nights (min	53	12	1988	6
25 C (77 F): Days with min	2	1	1965	1
10 mm (0.39 in): Days with 10 mm or more rain	67	16	1982	4
25 mm (0.98 in): Days with 25 mm or more rain	57	7	2013	2
50 mm (1.97 in): Days with 50 mm or more rain	15	3	1993	1
10 cm (3.9 in): Days with 10 cm or more snowfall	36	6	1975	3
25 cm (9.8 in): Days with 25 cm or more snowfall	6	1	1975	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1957.

Download the Data

Data for Williston Exp Farm 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 2026-10-12. Last revised 12 October 2026 (2026-10-12).

Williston Exp Farm Threshold Days by Year (USC00329430)

Key Facts for Williston Exp Farm Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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