Richland Threshold Days by Year (USC00457015)

17 fixed thresholds counted per year at Richland (USC00457015): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Richland Thresholds

Richland: nights with a minimum temperature at or below 0 C (32 F) in 77 years, most in 1985 with 127.
Richland: days with a maximum temperature at or above 30 C (86 F) in 75 years, most in 1958 with 110.
Richland: days with a maximum temperature at or above 35 C (95 F) in 75 years, most in 1958 with 68.
Richland: days with a maximum temperature at or above 90 F (32.2 C) in 75 years, most in 1958 with 88.
17 fixed thresholds have at least one qualifying day at Richland.

Days at or above 30 C (86 F)

75 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 110 in 1958.

Days at or above 30 C (86 F) per year at Richland
Year	Days	Decade average
1945	86	89
1946	89	89
1947	89	89
1949	92	89
1950	85	81.7
1951	89	81.7
1952	86	81.7
1953	72	81.7
1954	64	81.7
1955	74	81.7
1956	89	81.7
1957	96	81.7
1958	110	81.7
1959	52	81.7
1960	66	70.6
1961	85	70.6
1962	69	70.6
1963	80	70.6
1964	47	70.6
1965	50	70.6
1966	79	70.6
1967	97	70.6
1968	57	70.6
1969	76	70.6
1970	72	67.3
1971	58	67.3
1972	68	67.3
1973	71	67.3
1974	74	67.3
1975	66	67.3
1976	62	67.3
1977	71	67.3
1978	51	67.3
1979	80	67.3
1980	48	58
1981	68	58
1982	60	58
1983	53	58
1984	60	58
1985	67	58
1988	61	58
1989	47	58
1990	61	53.6
1991	50	53.6
1992	59	53.6
1993	40	53.6
1996	49	53.6
1997	51	53.6
1998	70	53.6
1999	49	53.6
2000	46	58.3
2001	52	58.3
2002	58	58.3
2003	72	58.3
2004	60	58.3
2005	57	58.3
2006	69	58.3
2007	54	58.3
2008	53	58.3
2009	62	58.3
2010	47	58.6
2011	47	58.6
2012	56	58.6
2013	80	58.6
2016	48	58.6
2017	74	58.6
2018	59	58.6
2019	58	58.6
2020	91	72.1
2021	68	72.1
2022	65	72.1
2023	72	72.1
2024	64	72.1
2025	76	72.1
2026	69	72.1

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
1945	1945-05-02	1945-10-08
1946	1946-04-24	1946-09-24
1947	1947-04-13	1947-10-03
1949	1949-04-17	1949-09-29
1950	1950-05-12	1950-09-24
1951	1951-04-14	1951-09-20
1952	1952-04-19	1952-10-07
1953	1953-05-06	1953-09-20
1954	1954-05-15	1954-09-27
1955	1955-05-20	1955-09-12
1956	1956-04-21	1956-09-26
1957	1957-04-29	1957-09-26
1958	1958-05-09	1958-10-06
1959	1959-05-13	1959-09-14
1960	1960-05-11	1960-09-20
1961	1961-05-20	1961-09-11
1962	1962-04-15	1962-09-27
1963	1963-05-19	1963-10-01
1964	1964-05-17	1964-09-24
1965	1965-05-13	1965-09-26
1966	1966-05-04	1966-10-07
1967	1967-05-17	1967-09-29
1968	1968-04-29	1968-09-12
1969	1969-05-08	1969-09-13
1970	1970-05-16	1970-10-05
1971	1971-05-03	1971-09-11
1972	1972-05-14	1972-09-17
1973	1973-05-14	1973-09-13
1974	1974-06-02	1974-09-27
1975	1975-05-11	1975-09-24
1976	1976-05-09	1976-10-13
1977	1977-04-08	1977-09-14
1978	1978-05-21	1978-09-04
1979	1979-05-15	1979-09-21
1980	1980-04-28	1980-10-08
1981	1981-04-24	1981-09-19
1982	1982-05-25	1982-09-09
1983	1983-05-21	1983-08-31
1984	1984-05-30	1984-09-19
1985	1985-05-16	1985-08-29
1988	1988-05-11	1988-10-01
1989	1989-06-02	1989-09-30
1990	1990-05-06	1990-09-26
1991	1991-06-11	1991-10-02
1992	1992-05-05	1992-09-04
1993	1993-05-10	1993-09-10
1996	1996-06-02	1996-09-29
1997	1997-05-12	1997-09-25
1998	1998-04-30	1998-09-17
1999	1999-05-23	1999-09-22
2000	2000-06-04	2000-09-18
2001	2001-05-12	2001-08-31
2002	2002-06-12	2002-09-15
2003	2003-05-24	2003-09-28
2004	2004-06-03	2004-09-27
2005	2005-05-26	2005-09-08
2006	2006-05-15	2006-09-12
2007	2007-05-08	2007-09-12
2008	2008-05-16	2008-09-18
2009	2009-05-17	2009-09-26
2010	2010-06-13	2010-09-28
2011	2011-06-22	2011-09-24
2012	2012-04-23	2012-09-19
2013	2013-05-06	2013-09-15
2016	2016-04-20	2016-09-16
2017	2017-05-04	2017-09-12
2018	2018-05-14	2018-09-07
2019	2019-05-11	2019-09-07
2020	2020-05-28	2020-10-08
2021	2021-05-16	2021-09-08
2022	2022-06-22	2022-09-08
2023	2023-05-03	2023-09-17
2024	2024-05-11	2024-09-25
2025	2025-05-02	2025-09-20
2026	2026-05-02	2026-09-10

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	75	110	1958	69
35 C (95 F): Days	75	68	1958	11
40 C (104 F): Days	40	15	1958	1
45 C (113 F): Days	2	1	1961	1
90 F (32.2 C): Days	75	88	1958	41
100 F (37.8 C): Days	70	40	1958	3
110 F (43.3 C): Days	6	5	2020	2
0 C (32 F): Ice days (max	72	54	1985	2
0 C (32 F): Frost days (min	77	127	1985	40
-10 C (14 F): Days with min	67	38	1949	4
-20 C (-4 F): Days with min	18	11	1950	1
-30 C (-22 F): Days with min	1	2	1950	2
20 C (68 F): Tropical nights (min	72	21	1958	5
25 C (77 F): Days with min	4	2	1961	1
10 mm (0.39 in): Days with 10 mm or more rain	68	6	1977	2
25 mm (0.98 in): Days with 25 mm or more rain	3	1	1956	1
10 cm (3.9 in): Days with 10 cm or more snowfall	12	3	1985	3

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1945.

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 2026-10-17. Last revised 17 October 2026 (2026-10-17).

Richland Threshold Days by Year (USC00457015)

Key Facts for Richland Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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