Riverside Citrus Exp Threshold Days by Year (USC00047473)

13 fixed thresholds counted per year at Riverside Citrus Exp (USC00047473): hot days, frost, tropical nights and heavy rain, with the most days in a year.

Key Facts for Riverside Citrus Exp Thresholds

Riverside Citrus Exp: days with 10 mm (0.39 in) or more of precipitation in 55 years, most in 1978 with 22.
Riverside Citrus Exp: days with a maximum temperature at or above 30 C (86 F) in 53 years, most in 2008 with 156.
Riverside Citrus Exp: days with a maximum temperature at or above 35 C (95 F) in 53 years, most in 1979 with 77.
Riverside Citrus Exp: days with a maximum temperature at or above 40 C (104 F) in 53 years, most in 2006 with 18.
13 fixed thresholds have at least one qualifying day at Riverside Citrus Exp.

Days at or above 30 C (86 F)

53 years with a qualifying day

Days per year at Riverside Citrus Exp with a maximum temperature at or above 30 C (86 F), with the decade average as a line. The most was 156 in 2008.

Days at or above 30 C (86 F) per year at Riverside Citrus Exp
Year	Days	Decade average
1956	119	129
1957	115	129
1958	150	129
1959	132	129
1960	143	123
1961	120	123
1962	134	123
1963	115	123
1964	122	123
1965	119	123
1966	127	123
1967	133	123
1968	120	123
1969	97	123
1970	120	119.2
1971	117	119.2
1972	103	119.2
1973	103	119.2
1974	123	119.2
1975	117	119.2
1976	122	119.2
1977	132	119.2
1978	137	119.2
1979	118	119.2
1980	116	118.3
1981	127	118.3
1982	81	118.3
1983	108	118.3
1984	137	118.3
1985	119	118.3
1986	129	118.3
1987	109	118.3
1988	134	118.3
1989	123	118.3
1990	133	127.2
1991	124	127.2
1992	126	127.2
1993	105	127.2
1994	123	127.2
1995	126	127.2
1996	138	127.2
1997	154	127.2
1998	105	127.2
1999	138	127.2
2000	134	140.4
2001	146	140.4
2002	132	140.4
2003	146	140.4
2004	145	140.4
2005	125	140.4
2006	128	140.4
2007	152	140.4
2008	156	140.4

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

First to last qualifying date each year at Riverside Citrus Exp
Year	First date	Last date
1956	1956-03-24	1956-11-12
1957	1957-02-13	1957-10-26
1958	1958-04-16	1958-12-18
1959	1959-01-18	1959-12-02
1960	1960-03-19	1960-10-31
1961	1961-01-18	1961-10-26
1962	1962-01-08	1962-11-09
1963	1963-02-04	1963-12-29
1964	1964-01-02	1964-12-01
1965	1965-04-20	1965-11-05
1966	1966-03-31	1966-11-03
1967	1967-03-01	1967-11-14
1968	1968-02-24	1968-11-11
1969	1969-03-27	1969-11-04
1970	1970-03-24	1970-11-02
1971	1971-01-19	1971-11-05
1972	1972-02-28	1972-10-24
1973	1973-04-27	1973-11-12
1974	1974-04-08	1974-11-14
1975	1975-01-15	1975-12-10
1976	1976-01-17	1976-11-19
1977	1977-02-13	1977-11-27
1978	1978-03-18	1978-11-09
1979	1979-03-07	1979-12-06
1980	1980-04-08	1980-12-26
1981	1981-02-18	1981-11-02
1982	1982-04-19	1982-10-23
1983	1983-05-17	1983-11-04
1984	1984-03-19	1984-11-04
1985	1985-04-01	1985-11-03
1986	1986-01-27	1986-11-12
1987	1987-01-26	1987-10-27
1988	1988-03-19	1988-11-05
1989	1989-03-30	1989-11-11
1990	1990-01-09	1990-11-13
1991	1991-02-14	1991-11-25
1992	1992-04-18	1992-11-14
1993	1993-04-19	1993-11-03
1994	1994-03-02	1994-10-31
1995	1995-02-01	1995-11-24
1996	1996-02-07	1996-11-12
1997	1997-03-09	1997-11-06
1998	1998-03-11	1998-11-26
1999	1999-01-05	1999-11-29
2000	2000-02-07	2000-12-29
2001	2001-02-03	2001-11-19
2002	2002-02-21	2002-11-21
2003	2003-01-04	2003-11-19
2004	2004-02-17	2004-12-11
2005	2005-01-19	2005-12-24
2006	2006-01-06	2006-12-07
2007	2007-02-04	2007-11-15
2008	2008-04-11	2008-12-01

Every Fixed Threshold

Fixed thresholds at Riverside Citrus Exp
Threshold	Years with a qualifying day	Most days in a year	Year	Latest year days
30 C (86 F): Days	53	156	2008	156
35 C (95 F): Days	53	77	1979	63
40 C (104 F): Days	53	18	2006	3
45 C (113 F): Days	5	1	1960	1
90 F (32.2 C): Days	53	125	1958	122
100 F (37.8 C): Days	53	36	1979	19
110 F (43.3 C): Days	16	4	2007	4
0 C (32 F): Frost days (min	44	19	1962	2
20 C (68 F): Tropical nights (min	48	35	1984	12
25 C (77 F): Days with min	3	2	2006	2
10 mm (0.39 in): Days with 10 mm or more rain	55	22	1978	7
25 mm (0.98 in): Days with 25 mm or more rain	43	6	1969	2
50 mm (1.97 in): Days with 50 mm or more rain	9	2	1995	1

Years with under 90 percent of days observed are left out of the most days column. Threshold history at this station starts in 1956.

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Data for Riverside Citrus Exp 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).

Riverside Citrus Exp Threshold Days by Year (USC00047473)

Key Facts for Riverside Citrus Exp Thresholds

Days at or above 30 C (86 F)

Every Fixed Threshold

Download the Data

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