Forest Threshold Days by Year (USC00223107)

17 fixed thresholds counted per year at Forest (USC00223107): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Forest Thresholds

Forest: days with 10 mm (0.39 in) or more of precipitation in 79 years, most in 1979 with 66.
Forest: days with 25 mm (0.98 in) or more of precipitation in 79 years, most in 1979 with 33.
Forest: days with 50 mm (1.97 in) or more of precipitation in 79 years, most in 1979 with 13.
Forest: days with a maximum temperature at or above 30 C (86 F) in 71 years, most in 1933 with 154.
17 fixed thresholds have at least one qualifying day at Forest.

Days at or above 30 C (86 F)

71 years with a qualifying day

Days per year at Forest with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 154 in 1933.

Days at or above 30 C (86 F) per year at Forest
Year	Days	Decade average
1930	117	124.5
1931	97	124.5
1932	66	124.5
1933	154	124.5
1934	140	124.5
1935	140	124.5
1936	134	124.5
1937	129	124.5
1938	130	124.5
1939	138	124.5
1940	104	119.6
1941	138	119.6
1942	120	119.6
1943	139	119.6
1944	132	119.6
1945	122	119.6
1946	104	119.6
1947	102	119.6
1948	115	119.6
1954	135	120
1955	133	120
1956	121	120
1957	91	120
1958	110	120
1959	130	120
1960	121	123.2
1961	113	123.2
1962	140	123.2
1963	132	123.2
1964	118	123.2
1965	137	123.2
1967	113	123.2
1968	115	123.2
1969	120	123.2
1970	126	118.9
1971	115	118.9
1972	139	118.9
1973	123	118.9
1974	105	118.9
1975	113	118.9
1976	96	118.9
1977	135	118.9
1978	137	118.9
1979	100	118.9
1980	127	119.7
1981	125	119.7
1982	130	119.7
1983	104	119.7
1984	130	119.7
1985	122	119.7
1986	129	119.7
1987	115	119.7
1988	109	119.7
1989	106	119.7
1990	128	114
1991	113	114
1992	97	114
1993	109	114
1994	102	114
1995	121	114
1996	102	114
1998	140	114
2000	127	130
2002	123	130
2003	125	130
2006	132	130
2007	151	130
2008	122	130
2010	139	126
2011	121	126
2012	118	126

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

First to last qualifying date each year at Forest
Year	First date	Last date
1930	1930-04-21	1930-10-15
1931	1931-04-17	1931-10-26
1932	1932-04-21	1932-09-22
1933	1933-03-14	1933-10-29
1934	1934-04-03	1934-11-08
1935	1935-03-16	1935-11-04
1936	1936-03-20	1936-11-02
1937	1937-01-22	1937-10-31
1938	1938-04-27	1938-10-14
1939	1939-03-23	1939-10-27
1940	1940-04-01	1940-10-27
1941	1941-04-12	1941-10-23
1942	1942-04-29	1942-10-19
1943	1943-04-27	1943-10-22
1944	1944-04-23	1944-11-01
1945	1945-03-17	1945-11-03
1946	1946-03-31	1946-10-31
1947	1947-05-05	1947-10-20
1948	1948-03-22	1948-09-25
1954	1954-04-08	1954-10-15
1955	1955-03-12	1955-10-24
1956	1956-04-29	1956-10-07
1957	1957-04-30	1957-09-23
1958	1958-04-25	1958-10-10
1959	1959-05-01	1959-10-14
1960	1960-04-21	1960-10-05
1961	1961-05-06	1961-10-31
1962	1962-04-30	1962-10-21
1963	1963-03-14	1963-10-22
1964	1964-04-20	1964-09-28
1965	1965-04-07	1965-10-24
1967	1967-03-11	1967-10-15
1968	1968-04-18	1968-10-14
1969	1969-05-20	1969-10-19
1970	1970-04-01	1970-10-25
1971	1971-05-26	1971-10-18
1972	1972-04-07	1972-10-18
1973	1973-05-10	1973-10-12
1974	1974-03-29	1974-09-21
1975	1975-04-24	1975-10-14
1976	1976-05-06	1976-10-04
1977	1977-04-14	1977-10-02
1978	1978-03-31	1978-10-25
1979	1979-04-11	1979-10-20
1980	1980-04-21	1980-10-11
1981	1981-04-04	1981-10-06
1982	1982-03-15	1982-10-10
1983	1983-05-13	1983-10-20
1984	1984-05-06	1984-10-31
1985	1985-04-28	1985-10-20
1986	1986-04-04	1986-11-08
1987	1987-04-19	1987-10-02
1988	1988-04-04	1988-09-26
1989	1989-04-25	1989-10-04
1990	1990-04-30	1990-11-04
1991	1991-05-12	1991-10-12
1992	1992-04-24	1992-09-22
1993	1993-05-06	1993-10-19
1994	1994-04-27	1994-10-01
1995	1995-03-22	1995-10-02
1996	1996-05-05	1996-09-25
1998	1998-05-07	1998-11-01
2000	2000-05-11	2000-10-29
2002	2002-04-20	2002-10-06
2003	2003-04-13	2003-10-25
2006	2006-04-17	2006-10-18
2007	2007-04-30	2007-11-13
2008	2008-04-11	2008-12-27
2010	2010-05-05	2010-10-27
2011	2011-04-10	2011-10-18
2012	2012-02-24	2012-09-30

Every Fixed Threshold

Fixed thresholds at Forest
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	71	154	1933	118
35 C (95 F): Days	71	62	1943	16
40 C (104 F): Days	5	7	1930	2
90 F (32.2 C): Days	71	120	1933	62
100 F (37.8 C): Days	27	24	1930	1
0 C (32 F): Ice days (max	30	7	1940	2
0 C (32 F): Frost days (min	68	82	1963	46
-10 C (14 F): Days with min	45	8	1962	2
20 C (68 F): Tropical nights (min	68	96	1991	60
25 C (77 F): Days with min	14	2	1942	1
10 mm (0.39 in): Days with 10 mm or more rain	79	66	1979	46
25 mm (0.98 in): Days with 25 mm or more rain	79	33	1979	26
50 mm (1.97 in): Days with 50 mm or more rain	79	13	1979	7
100 mm (3.94 in): Days with 100 mm or more rain	31	2	1954	1
200 mm (7.87 in): Days with 200 mm or more rain	1	1	2011	1
10 cm (3.9 in): Days with 10 cm or more snowfall	4	1	1940	1
25 cm (9.8 in): Days with 25 cm or more snowfall	1	1	1940	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1930.

Download the Data

Data for Forest 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).

Forest Threshold Days by Year (USC00223107)

Key Facts for Forest Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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