Dalton Threshold Days by Year (USC00252145)

18 fixed thresholds counted per year at Dalton (USC00252145): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Dalton Thresholds

Dalton: days with 10 mm (0.39 in) or more of precipitation in 92 years, most in 2015 with 26.
Dalton: days with 25 mm (0.98 in) or more of precipitation in 90 years, most in 2009 with 8.
Dalton: days with 10 cm (3.9 in) or more of snowfall in 76 years, most in 1983 with 12.
Dalton: days with a maximum temperature at or above 30 C (86 F) in 56 years, most in 1963 with 92.
18 fixed thresholds have at least one qualifying day at Dalton.

Days at or above 30 C (86 F)

56 years with a qualifying day

Days per year at Dalton with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 92 in 1963.

Days at or above 30 C (86 F) per year at Dalton
Year	Days	Decade average
1962	67	69
1963	92	69
1964	83	69
1965	43	69
1966	74	69
1967	59	69
1968	61	69
1969	73	69
1970	80	69
1971	67	69
1972	65	69
1973	65	69
1974	75	69
1975	71	69
1976	87	69
1977	71	69
1978	61	69
1979	48	69
1980	56	52.7
1981	48	52.7
1982	40	52.7
1983	58	52.7
1984	62	52.7
1985	52	52.7
1986	56	52.7
1987	47	52.7
1988	60	52.7
1989	48	52.7
1990	48	45.1
1991	45	45.1
1992	26	45.1
1993	30	45.1
1994	64	45.1
1995	53	45.1
1996	40	45.1
1997	49	45.1
1998	53	45.1
1999	43	45.1
2000	75	52.9
2001	61	52.9
2002	68	52.9
2003	55	52.9
2004	37	52.9
2005	53	52.9
2006	51	52.9
2007	64	52.9
2008	44	52.9
2009	21	52.9
2010	56	60.6
2011	53	60.6
2012	81	60.6
2013	62	60.6
2014	54	60.6
2015	67	60.6
2016	54	60.6
2017	58	60.6

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

First to last qualifying date each year at Dalton
Year	First date	Last date
1962	1962-04-20	1962-10-14
1963	1963-05-06	1963-10-06
1964	1964-05-16	1964-10-01
1965	1965-04-30	1965-10-09
1966	1966-05-05	1966-09-25
1967	1967-05-22	1967-10-04
1968	1968-06-02	1968-09-14
1969	1969-05-14	1969-09-29
1970	1970-05-17	1970-10-05
1971	1971-06-16	1971-09-14
1972	1972-05-16	1972-09-19
1973	1973-05-18	1973-09-01
1974	1974-05-19	1974-09-27
1975	1975-06-03	1975-10-08
1976	1976-05-18	1976-10-10
1977	1977-04-09	1977-09-29
1978	1978-05-14	1978-10-02
1979	1979-05-07	1979-09-11
1980	1980-04-22	1980-10-01
1981	1981-06-07	1981-09-20
1982	1982-06-29	1982-09-11
1983	1983-05-27	1983-09-28
1984	1984-05-21	1984-09-20
1985	1985-05-09	1985-09-19
1986	1986-06-07	1986-08-31
1987	1987-06-06	1987-09-05
1988	1988-05-17	1988-09-11
1989	1989-04-22	1989-10-01
1990	1990-06-05	1990-09-14
1991	1991-05-12	1991-09-22
1992	1992-05-01	1992-09-25
1993	1993-05-27	1993-09-13
1994	1994-05-17	1994-09-29
1995	1995-06-14	1995-09-16
1996	1996-04-11	1996-09-10
1997	1997-06-19	1997-09-16
1998	1998-05-18	1998-09-19
1999	1999-06-05	1999-09-01
2000	2000-05-05	2000-09-18
2001	2001-04-28	2001-09-05
2002	2002-05-31	2002-09-08
2003	2003-05-30	2003-09-06
2004	2004-05-06	2004-09-19
2005	2005-05-20	2005-10-03
2006	2006-05-20	2006-08-31
2007	2007-05-13	2007-10-07
2008	2008-06-11	2008-09-02
2009	2009-05-19	2009-09-08
2010	2010-05-23	2010-09-27
2011	2011-05-09	2011-09-12
2012	2012-04-25	2012-09-12
2013	2013-05-14	2013-09-09
2014	2014-05-28	2014-09-27
2015	2015-06-03	2015-10-12
2016	2016-06-06	2016-09-24
2017	2017-05-07	2017-09-22

Every Fixed Threshold

Fixed thresholds at Dalton
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	56	92	1963	58
35 C (95 F): Days	54	31	2012	12
40 C (104 F): Days	1	1	1964	1
90 F (32.2 C): Days	56	62	1964	34
100 F (37.8 C): Days	30	8	1964	2
0 C (32 F): Ice days (max	56	55	1978	17
0 C (32 F): Frost days (min	56	198	1970	105
-10 C (14 F): Days with min	56	87	1978	17
-20 C (-4 F): Days with min	51	23	1985	2
-30 C (-22 F): Days with min	11	6	1983	1
20 C (68 F): Tropical nights (min	13	2	1974	2
10 mm (0.39 in): Days with 10 mm or more rain	92	26	2015	15
25 mm (0.98 in): Days with 25 mm or more rain	90	8	2009	2
50 mm (1.97 in): Days with 50 mm or more rain	38	2	1955	1
100 mm (3.94 in): Days with 100 mm or more rain	2	1	1945	1
10 cm (3.9 in): Days with 10 cm or more snowfall	76	12	1983	2
25 cm (9.8 in): Days with 25 cm or more snowfall	29	3	1983	1
50 cm (19.7 in): Days with 50 cm or more snowfall	1	1	2006	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1962.

Download the Data

Data for Dalton 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).

Dalton Threshold Days by Year (USC00252145)

Key Facts for Dalton Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

Related