Sanderson Threshold Days by Year (USC00418022)

17 fixed thresholds counted per year at Sanderson (USC00418022): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Sanderson Thresholds

Sanderson: days with 10 mm (0.39 in) or more of precipitation in 68 years, most in 1974 with 20.
Sanderson: days with 25 mm (0.98 in) or more of precipitation in 64 years, most in 1900 with 10.
Sanderson: days with a maximum temperature at or above 30 C (86 F) in 54 years, most in 1934 with 191.
Sanderson: days with a maximum temperature at or above 35 C (95 F) in 54 years, most in 1934 with 120.
17 fixed thresholds have at least one qualifying day at Sanderson.

Days at or above 30 C (86 F)

54 years with a qualifying day

Days per year at Sanderson with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 191 in 1934.

Days at or above 30 C (86 F) per year at Sanderson
Year	Days	Decade average
1900	144	156
1901	160	156
1902	164	156
1929	175	175
1930	160	155.5
1931	157	155.5
1932	147	155.5
1933	134	155.5
1934	191	155.5
1935	144	155.5
1963	141	136.8
1965	151	136.8
1966	130	136.8
1967	139	136.8
1968	125	136.8
1969	135	136.8
1970	129	131.5
1971	118	131.5
1972	134	131.5
1973	136	131.5
1974	130	131.5
1975	135	131.5
1976	109	131.5
1977	153	131.5
1978	134	131.5
1979	137	131.5
1980	144	128.1
1981	137	128.1
1982	160	128.1
1983	146	128.1
1984	139	128.1
1985	137	128.1
1986	101	128.1
1987	102	128.1
1988	86	128.1
1989	129	128.1
1991	132	137.8
1992	122	137.8
1993	137	137.8
1994	146	137.8
1995	144	137.8
1996	142	137.8
1997	129	137.8
1998	159	137.8
1999	129	137.8
2000	154	139.6
2001	145	139.6
2002	148	139.6
2003	134	139.6
2004	102	139.6
2008	138	139.6
2009	156	139.6
2010	140	158.5
2011	177	158.5

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

First to last qualifying date each year at Sanderson
Year	First date	Last date
1900	1900-05-03	1900-10-14
1901	1901-04-25	1901-11-26
1902	1902-04-10	1902-10-30
1929	1929-03-07	1929-10-20
1930	1930-02-12	1930-10-16
1931	1931-03-19	1931-10-27
1932	1932-02-07	1932-11-11
1933	1933-03-08	1933-09-26
1934	1934-03-05	1934-11-07
1935	1935-03-19	1935-11-10
1963	1963-03-10	1963-10-10
1965	1965-03-23	1965-11-25
1966	1966-03-22	1966-10-13
1967	1967-03-04	1967-11-02
1968	1968-04-19	1968-10-30
1969	1969-03-20	1969-11-13
1970	1970-02-19	1970-11-23
1971	1971-01-18	1971-10-03
1972	1972-02-25	1972-10-19
1973	1973-03-24	1973-11-03
1974	1974-03-03	1974-09-28
1975	1975-03-12	1975-11-12
1976	1976-02-21	1976-10-04
1977	1977-02-25	1977-11-01
1978	1978-03-24	1978-10-11
1979	1979-02-15	1979-10-28
1980	1980-02-20	1980-11-10
1981	1981-04-04	1981-11-19
1982	1982-03-12	1982-10-29
1983	1983-04-01	1983-11-14
1984	1984-03-03	1984-10-21
1985	1985-03-12	1985-10-04
1986	1986-02-19	1986-10-04
1987	1987-04-11	1987-10-06
1988	1988-03-24	1988-11-08
1989	1989-03-13	1989-10-24
1991	1991-03-06	1991-10-24
1992	1992-04-08	1992-11-12
1993	1993-03-10	1993-10-19
1994	1994-03-06	1994-11-04
1995	1995-03-19	1995-10-27
1996	1996-02-19	1996-11-21
1997	1997-03-14	1997-11-01
1998	1998-03-23	1998-10-17
1999	1999-04-08	1999-10-17
2000	2000-01-19	2000-10-05
2001	2001-03-22	2001-10-25
2002	2002-03-15	2002-10-13
2003	2003-03-28	2003-10-06
2004	2004-05-13	2004-10-29
2008	2008-02-24	2008-10-10
2009	2009-03-31	2009-10-16
2010	2010-03-31	2010-11-23
2011	2011-02-28	2011-10-27

Every Fixed Threshold

Fixed thresholds at Sanderson
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	54	191	1934	177
35 C (95 F): Days	54	120	1934	114
40 C (104 F): Days	31	12	1969	12
90 F (32.2 C): Days	54	169	1934	152
100 F (37.8 C): Days	51	46	2011	46
110 F (43.3 C): Days	1	1	1969	1
0 C (32 F): Ice days (max	30	5	1985	2
0 C (32 F): Frost days (min	51	84	1988	53
-10 C (14 F): Days with min	28	7	1989	5
20 C (68 F): Tropical nights (min	51	149	1900	90
25 C (77 F): Days with min	12	58	1900	14
10 mm (0.39 in): Days with 10 mm or more rain	68	20	1974	10
25 mm (0.98 in): Days with 25 mm or more rain	64	10	1900	2
50 mm (1.97 in): Days with 50 mm or more rain	32	4	1900	2
100 mm (3.94 in): Days with 100 mm or more rain	8	2	1999	1
10 cm (3.9 in): Days with 10 cm or more snowfall	3	1	1929	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1986	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1900.

Download the Data

Data for Sanderson 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).

Sanderson Threshold Days by Year (USC00418022)

Key Facts for Sanderson Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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