Richland Threshold Days by Year (USC00357160)

17 fixed thresholds counted per year at Richland (USC00357160): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Richland Thresholds

Richland: days with a maximum temperature at or above 30 C (86 F) in 58 years, most in 1955 with 115.
Richland: days with a maximum temperature at or above 35 C (95 F) in 58 years, most in 1955 with 81.
Richland: days with a maximum temperature at or above 90 F (32.2 C) in 58 years, most in 1955 with 92.
Richland: days with a maximum temperature at or below 0 C (32 F) in 58 years, most in 1989 with 32.
17 fixed thresholds have at least one qualifying day at Richland.

Days at or above 30 C (86 F)

58 years with a qualifying day

Days per year at Richland with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 115 in 1955.

Days at or above 30 C (86 F) per year at Richland
Year	Days	Decade average
1896	70	61.5
1899	53	61.5
1900	51	53.5
1907	56	53.5
1910	63	63.5
1911	42	63.5
1912	40	63.5
1915	67	63.5
1916	57	63.5
1917	87	63.5
1918	80	63.5
1919	72	63.5
1920	66	66
1945	79	83
1946	68	83
1947	85	83
1948	77	83
1949	106	83
1952	97	102.7
1955	115	102.7
1959	96	102.7
1960	105	89.1
1961	99	89.1
1962	88	89.1
1964	66	89.1
1965	82	89.1
1966	111	89.1
1967	104	89.1
1968	63	89.1
1969	84	89.1
1970	84	77.4
1971	65	77.4
1972	86	77.4
1973	86	77.4
1974	92	77.4
1975	72	77.4
1976	63	77.4
1978	58	77.4
1979	91	77.4
1983	41	73
1987	96	73
1988	95	73
1989	60	73
1990	76	76.8
1991	73	76.8
1992	77	76.8
1994	94	76.8
1995	67	76.8
1996	74	76.8
2000	104	78.5
2003	95	78.5
2004	65	78.5
2005	66	78.5
2006	81	78.5
2007	79	78.5
2008	64	78.5
2009	74	78.5
2010	60	60

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

First to last qualifying date each year at Richland
Year	First date	Last date
1896	1896-05-29	1896-09-19
1899	1899-06-09	1899-09-29
1900	1900-05-10	1900-09-13
1907	1907-05-29	1907-10-12
1910	1910-04-24	1910-09-19
1911	1911-05-31	1911-09-12
1912	1912-06-05	1912-09-17
1915	1915-04-28	1915-09-21
1916	1916-06-13	1916-09-21
1917	1917-05-14	1917-09-20
1918	1918-05-03	1918-09-28
1919	1919-05-18	1919-09-16
1920	1920-06-20	1920-10-06
1945	1945-05-02	1945-10-15
1946	1946-04-23	1946-09-24
1947	1947-05-02	1947-10-03
1948	1948-05-16	1948-10-03
1949	1949-04-17	1949-09-27
1952	1952-04-25	1952-10-08
1955	1955-05-19	1955-10-17
1959	1959-05-11	1959-09-22
1960	1960-04-30	1960-10-03
1961	1961-05-08	1961-10-05
1962	1962-04-15	1962-09-26
1964	1964-05-16	1964-10-12
1965	1965-04-24	1965-09-14
1966	1966-05-02	1966-10-01
1967	1967-05-20	1967-09-29
1968	1968-04-30	1968-09-25
1969	1969-05-08	1969-09-12
1970	1970-05-04	1970-10-04
1971	1971-05-01	1971-10-10
1972	1972-05-12	1972-09-17
1973	1973-05-14	1973-09-13
1974	1974-06-01	1974-09-30
1975	1975-05-10	1975-09-24
1976	1976-06-27	1976-09-24
1978	1978-06-03	1978-10-08
1979	1979-05-14	1979-10-07
1983	1983-05-16	1983-09-26
1987	1987-04-28	1987-10-04
1988	1988-05-11	1988-10-08
1989	1989-06-06	1989-09-25
1990	1990-06-10	1990-09-29
1991	1991-06-14	1991-09-30
1992	1992-05-04	1992-10-02
1994	1994-04-18	1994-09-30
1995	1995-05-30	1995-09-18
1996	1996-06-03	1996-10-09
2000	2000-05-22	2000-09-25
2003	2003-06-04	2003-10-25
2004	2004-05-05	2004-09-29
2005	2005-04-27	2005-09-22
2006	2006-05-15	2006-09-30
2007	2007-05-17	2007-09-14
2008	2008-05-17	2008-10-02
2009	2009-05-18	2009-09-27
2010	2010-06-24	2010-10-03

Every Fixed Threshold

Fixed thresholds at Richland
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	58	115	1955	60
35 C (95 F): Days	58	81	1955	17
40 C (104 F): Days	29	10	1955	1
90 F (32.2 C): Days	58	92	1955	38
100 F (37.8 C): Days	55	48	1955	1
0 C (32 F): Ice days (max	58	32	1989	9
0 C (32 F): Frost days (min	58	206	1900	156
-10 C (14 F): Days with min	58	41	1989	8
-20 C (-4 F): Days with min	34	18	1949	1
-30 C (-22 F): Days with min	6	4	1989	4
20 C (68 F): Tropical nights (min	14	8	1983	2
25 C (77 F): Days with min	1	2	1983	2
10 mm (0.39 in): Days with 10 mm or more rain	57	18	1983	3
25 mm (0.98 in): Days with 25 mm or more rain	24	5	1990	2
50 mm (1.97 in): Days with 50 mm or more rain	2	1	1995	1
10 cm (3.9 in): Days with 10 cm or more snowfall	22	6	1983	1
25 cm (9.8 in): Days with 25 cm or more snowfall	2	1	1962	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1896.

Download the Data

Data for Richland 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).

Richland Threshold Days by Year (USC00357160)

Key Facts for Richland Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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