Santa Margarita Boost Weather Records (USC00047933)

Record envelope, standing records and threshold days for Santa Margarita Boost (USC00047933), California, United States, with 85 years of record.

Key Facts for Santa Margarita Boost

Santa Margarita Boost (USC00047933) is a weather station in California, United States at 35.37 latitude and -120.64 longitude, 350 m (1,148 ft) above sea level.
The station reports from 1942 to 2026, 85 years of record.
1,464 records set at Santa Margarita Boost still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Santa Margarita Boost set a daily record precipitation of 25.1 mm (1.0 in) on 29 May 2026.

About the Station

Location: California, United States, 35.37 latitude, -120.64 longitude.
Elevation: 350 m (1,148 ft).
Period of record: 1942 to 2026, 85 years.
Eligible elements: prcp, snow, snwd.

Daily Record Envelope and 2026

0 days at or beyond a record

The band shows the record high and record low for each calendar day at Santa Margarita Boost. The lines show the 2026 daily maximum and minimum. 0 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.

Daily record high and record low at Santa Margarita Boost, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	30.0 C (86.0 F)	-6.7 C (19.9 F)	n/a	n/a
Feb	28.9 C (84.0 F)	-3.9 C (25.0 F)	n/a	n/a
Mar	35.0 C (95.0 F)	-3.3 C (26.1 F)	n/a	n/a
Apr	36.7 C (98.1 F)	-2.8 C (27.0 F)	n/a	n/a
May	40.6 C (105.1 F)	1.7 C (35.1 F)	n/a	n/a
Jun	44.4 C (111.9 F)	5.6 C (42.1 F)	n/a	n/a
Jul	44.4 C (111.9 F)	7.2 C (45.0 F)	n/a	n/a
Aug	44.4 C (111.9 F)	6.7 C (44.1 F)	n/a	n/a
Sep	41.7 C (107.1 F)	5.0 C (41.0 F)	n/a	n/a
Oct	42.2 C (108.0 F)	-3.3 C (26.1 F)	n/a	n/a
Nov	35.0 C (95.0 F)	-3.3 C (26.1 F)	n/a	n/a
Dec	26.1 C (79.0 F)	-8.3 C (17.1 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Santa Margarita Boost still stand. 2012 holds the most, with 286.

All-Time Record Progression

1 new records

1 all-time records were set at Santa Margarita Boost between 14 October 2009 and 14 October 2009. Each dot is a new record.

Wettest Day of Each Month

Oct: 224.3 mm (8.8 in)

The wettest day on record for each calendar month at Santa Margarita Boost. The most was 224.3 mm (8.8 in) on 14 October 2009.

Record daily precipitation for each month at Santa Margarita Boost
Month	Record daily precipitation (mm)	Date
Jan	165.1 mm (6.5 in)	25 January 1969
Feb	129.5 mm (5.1 in)	25 February 1969
Mar	137.9 mm (5.4 in)	11 March 1995
Apr	96.0 mm (3.8 in)	14 April 2024
May	81.8 mm (3.2 in)	19 May 1957
Jun	24.4 mm (1.0 in)	5 June 2011
Jul	23.1 mm (0.9 in)	10 July 1950
Aug	24.9 mm (1.0 in)	20 August 1976
Sep	62.0 mm (2.4 in)	19 September 1959
Oct	224.3 mm (8.8 in)	14 October 2009
Nov	106.7 mm (4.2 in)	9 November 2002
Dec	200.7 mm (7.9 in)	6 December 1966

Period of Record Coverage

1956 to 2015

14 years of record at Santa Margarita Boost, 1956 to 2015. 10 years have data for under 90 percent of days and are left out of rankings: 1956, 1963, 1966, 1970, 1975, 1976, 1977, 1980 and others.

Days with data per year at Santa Margarita Boost
Year	Days with data	Share of year	Complete
1956	1	0%	No
1963	31	8%	No
1966	30	8%	No
1970	31	8%	No
1975	61	17%	No
1976	152	42%	No
1977	59	16%	No
1980	30	8%	No
1981	28	8%	No
2011	348	95%	Yes
2012	366	100%	Yes
2013	364	100%	Yes
2014	365	100%	Yes
2015	212	58%	No

Latest Records

Latest records at Santa Margarita Boost
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
29 May 2026	Santa Margarita Boost, US	daily rain	25.1 mm (1.0 in)	7.3 mm (0.29 in)	28 years	22 of 100 (Routine)
25 December 2025	Santa Margarita Boost, US	daily rain	87.9 mm (3.5 in)	12.7 mm (0.5 in)	42 years	25 of 100 (Routine)
15 October 2025	Santa Margarita Boost, US	daily rain	10.7 mm (0.4 in)	5.9 mm (0.23 in)	16 years	14 of 100 (Routine)
24 September 2025	Santa Margarita Boost, US	daily rain	11.2 mm (0.4 in)	4.1 mm (0.16 in)	39 years	20 of 100 (Routine)
13 March 2025	Santa Margarita Boost, US	daily rain	50.3 mm (2.0 in)	12.2 mm (0.5 in)	60 years	32 of 100 (Routine)
7 February 2025	Santa Margarita Boost, US	daily rain	48.5 mm (1.9 in)	1.5 mm (0.06 in)	10 years	11 of 100 (Routine)
5 February 2025	Santa Margarita Boost, US	daily rain	64.8 mm (2.6 in)	5.9 mm (0.23 in)	29 years	18 of 100 (Routine)
14 April 2024	Santa Margarita Boost, US	monthly rain	96.0 mm (3.8 in)	15.5 mm (0.6 in)	42 years	40 of 100 (Notable)
19 February 2024	Santa Margarita Boost, US	daily rain	81.8 mm (3.2 in)	9.9 mm (0.39 in)	65 years	31 of 100 (Routine)
21 December 2023	Santa Margarita Boost, US	daily rain	57.7 mm (2.3 in)	14.0 mm (0.6 in)	52 years	29 of 100 (Routine)
29 March 2023	Santa Margarita Boost, US	daily rain	40.6 mm (1.6 in)	13.4 mm (0.5 in)	16 years	19 of 100 (Routine)
15 March 2023	Santa Margarita Boost, US	daily rain	100.3 mm (3.9 in)	19.0 mm (0.7 in)	70 years	38 of 100 (Notable)
10 March 2023	Santa Margarita Boost, US	daily rain	123.2 mm (4.9 in)	4.1 mm (0.16 in)	28 years	18 of 100 (Routine)
10 January 2023	Santa Margarita Boost, US	daily rain	149.9 mm (5.9 in)	9.4 mm (0.37 in)	28 years	19 of 100 (Routine)
9 January 2023	Santa Margarita Boost, US	daily rain	93.5 mm (3.7 in)	3.3 mm (0.13 in)	17 years	14 of 100 (Routine)
1 January 2023	Santa Margarita Boost, US	daily rain	51.1 mm (2.0 in)	2.8 mm (0.11 in)	16 years	14 of 100 (Routine)
4 December 2022	Santa Margarita Boost, US	daily rain	62.7 mm (2.5 in)	6.1 mm (0.24 in)	41 years	22 of 100 (Routine)
20 September 2022	Santa Margarita Boost, US	daily rain	13.5 mm (0.5 in)	9.7 mm (0.38 in)	63 years	20 of 100 (Routine)
14 December 2021	Santa Margarita Boost, US	daily rain	129.5 mm (5.1 in)	107.9 mm (4.2 in)	52 years	63 of 100 (Major)
25 October 2021	Santa Margarita Boost, US	daily rain	106.7 mm (4.2 in)	75.2 mm (3.0 in)	70 years	61 of 100 (Major)

Extremes by Year

1942 to 2026

Yearly extremes at Santa Margarita Boost: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	44.4 C (111.9 F)	2012	38.6 C (101.5 F)	14
Coldest night (TNn)	-8.3 C (17.1 F)	1975	-3.3 C (26.1 F)	13
Wettest day (Rx1day)	224.3 mm (8.8 in)	2009	90.8 mm (3.6 in)	84
Wettest five days (Rx5day)	399.3 mm (15.7 in)	1966	170.5 mm (6.7 in)	84
Longest dry spell (CDD)	218 days	2012	129 days	84

Hottest day (TXx)

The hottest day of the year at Santa Margarita Boost, 1942 to 2026. The record is 44.4 C (111.9 F) in 2012, marked on the chart; the median year is 38.6 C (101.5 F).

Hottest day (TXx) at Santa Margarita Boost by year
Year	Hottest day (TXx)
1942	n/a
1943	n/a
1944	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	18.9 C (66.0 F)
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	22.8 C (73.0 F)
1964	n/a
1965	n/a
1966	34.4 C (93.9 F)
1967	n/a
1968	n/a
1969	n/a
1970	35.6 C (96.1 F)
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	40.0 C (104.0 F)
1976	37.2 C (99.0 F)
1977	40.0 C (104.0 F)
1978	n/a
1979	n/a
1980	31.7 C (89.1 F)
1981	25.6 C (78.1 F)
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	41.7 C (107.1 F)
2012	44.4 C (111.9 F)
2013	44.4 C (111.9 F)
2014	42.2 C (108.0 F)
2015	40.0 C (104.0 F)
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Coldest night (TNn)

The coldest night of the year at Santa Margarita Boost, 1942 to 2026. The record is -8.3 C (17.1 F) in 1975, marked on the chart; the median year is -3.3 C (26.1 F).

Coldest night (TNn) at Santa Margarita Boost by year
Year	Coldest night (TNn)
1942	n/a
1943	n/a
1944	n/a
1946	n/a
1947	n/a
1948	n/a
1949	n/a
1950	n/a
1951	n/a
1952	n/a
1953	n/a
1954	n/a
1955	n/a
1956	n/a
1957	n/a
1958	n/a
1959	n/a
1960	n/a
1961	n/a
1962	n/a
1963	-4.4 C (24.1 F)
1964	n/a
1965	n/a
1966	-1.1 C (30.0 F)
1967	n/a
1968	n/a
1969	n/a
1970	-3.3 C (26.1 F)
1971	n/a
1972	n/a
1973	n/a
1974	n/a
1975	-8.3 C (17.1 F)
1976	-5.6 C (21.9 F)
1977	-2.2 C (28.0 F)
1978	n/a
1979	n/a
1980	-3.3 C (26.1 F)
1981	-2.2 C (28.0 F)
1982	n/a
1983	n/a
1984	n/a
1985	n/a
1986	n/a
1987	n/a
1988	n/a
1989	n/a
1990	n/a
1991	n/a
1992	n/a
1993	n/a
1994	n/a
1995	n/a
1996	n/a
1997	n/a
1998	n/a
1999	n/a
2000	n/a
2001	n/a
2002	n/a
2003	n/a
2004	n/a
2005	n/a
2006	n/a
2007	n/a
2008	n/a
2009	n/a
2010	n/a
2011	-5.6 C (21.9 F)
2012	-6.7 C (19.9 F)
2013	-8.3 C (17.1 F)
2014	-3.3 C (26.1 F)
2015	-3.3 C (26.1 F)
2016	n/a
2017	n/a
2018	n/a
2019	n/a
2020	n/a
2021	n/a
2022	n/a
2023	n/a
2024	n/a
2025	n/a
2026	n/a

Wettest day (Rx1day)

The wettest day of the year at Santa Margarita Boost, 1942 to 2026. The record is 224.3 mm (8.8 in) in 2009, marked on the chart; the median year is 90.8 mm (3.6 in).

Wettest day (Rx1day) at Santa Margarita Boost by year
Year	Wettest day (Rx1day)
1942	72.6 mm (2.9 in)
1943	128.8 mm (5.1 in)
1944	0.0 mm (0.00 in)
1946	93.2 mm (3.7 in)
1947	29.2 mm (1.1 in)
1948	49.3 mm (1.9 in)
1949	74.2 mm (2.9 in)
1950	105.7 mm (4.2 in)
1951	75.9 mm (3.0 in)
1952	118.1 mm (4.6 in)
1953	81.3 mm (3.2 in)
1954	97.8 mm (3.9 in)
1955	137.4 mm (5.4 in)
1956	99.6 mm (3.9 in)
1957	81.8 mm (3.2 in)
1958	100.1 mm (3.9 in)
1959	112.3 mm (4.4 in)
1960	122.9 mm (4.8 in)
1961	68.3 mm (2.7 in)
1962	158.2 mm (6.2 in)
1963	117.3 mm (4.6 in)
1964	57.2 mm (2.3 in)
1965	86.9 mm (3.4 in)
1966	200.7 mm (7.9 in)
1967	74.2 mm (2.9 in)
1968	52.8 mm (2.1 in)
1969	165.1 mm (6.5 in)
1970	87.6 mm (3.4 in)
1971	51.8 mm (2.0 in)
1972	69.1 mm (2.7 in)
1973	103.6 mm (4.1 in)
1974	102.1 mm (4.0 in)
1975	71.4 mm (2.8 in)
1976	62.5 mm (2.5 in)
1977	97.0 mm (3.8 in)
1978	108.0 mm (4.3 in)
1979	52.6 mm (2.1 in)
1980	99.8 mm (3.9 in)
1981	94.5 mm (3.7 in)
1982	99.1 mm (3.9 in)
1983	103.6 mm (4.1 in)
1984	64.5 mm (2.5 in)
1985	96.5 mm (3.8 in)
1986	112.8 mm (4.4 in)
1987	60.5 mm (2.4 in)
1988	58.4 mm (2.3 in)
1989	37.3 mm (1.5 in)
1990	75.2 mm (3.0 in)
1991	84.3 mm (3.3 in)
1992	135.9 mm (5.4 in)
1993	75.4 mm (3.0 in)
1994	55.1 mm (2.2 in)
1995	140.5 mm (5.5 in)
1996	103.4 mm (4.1 in)
1997	106.7 mm (4.2 in)
1998	71.4 mm (2.8 in)
1999	75.7 mm (3.0 in)
2000	94.2 mm (3.7 in)
2001	86.4 mm (3.4 in)
2002	106.7 mm (4.2 in)
2003	71.9 mm (2.8 in)
2004	158.5 mm (6.2 in)
2005	90.2 mm (3.6 in)
2006	127.0 mm (5.0 in)
2007	85.3 mm (3.4 in)
2008	147.3 mm (5.8 in)
2009	224.3 mm (8.8 in)
2010	145.3 mm (5.7 in)
2011	91.4 mm (3.6 in)
2012	95.2 mm (3.7 in)
2013	20.6 mm (0.8 in)
2014	74.9 mm (2.9 in)
2015	47.0 mm (1.9 in)
2016	84.8 mm (3.3 in)
2017	140.7 mm (5.5 in)
2018	132.3 mm (5.2 in)
2019	81.5 mm (3.2 in)
2020	67.6 mm (2.7 in)
2021	129.5 mm (5.1 in)
2022	62.7 mm (2.5 in)
2023	149.9 mm (5.9 in)
2024	96.0 mm (3.8 in)
2025	87.9 mm (3.5 in)
2026	49.8 mm (2.0 in)

Wettest five days (Rx5day)

The wettest five days of the year at Santa Margarita Boost, 1942 to 2026. The record is 399.3 mm (15.7 in) in 1966, marked on the chart; the median year is 170.5 mm (6.7 in).

Wettest five days (Rx5day) at Santa Margarita Boost by year
Year	Wettest five days (Rx5day)
1942	83.3 mm (3.3 in)
1943	234.5 mm (9.2 in)
1944	0.0 mm (0.00 in)
1946	138.9 mm (5.5 in)
1947	43.2 mm (1.7 in)
1948	90.2 mm (3.6 in)
1949	97.3 mm (3.8 in)
1950	211.4 mm (8.3 in)
1951	184.2 mm (7.3 in)
1952	230.6 mm (9.1 in)
1953	105.7 mm (4.2 in)
1954	141.0 mm (5.6 in)
1955	282.6 mm (11.1 in)
1956	207.2 mm (8.2 in)
1957	139.4 mm (5.5 in)
1958	176.3 mm (6.9 in)
1959	181.2 mm (7.1 in)
1960	136.6 mm (5.4 in)
1961	114.6 mm (4.5 in)
1962	276.6 mm (10.9 in)
1963	200.1 mm (7.9 in)
1964	124.9 mm (4.9 in)
1965	240.3 mm (9.5 in)
1966	399.3 mm (15.7 in)
1967	174.2 mm (6.9 in)
1968	70.4 mm (2.8 in)
1969	340.7 mm (13.4 in)
1970	169.7 mm (6.7 in)
1971	144.3 mm (5.7 in)
1972	120.6 mm (4.7 in)
1973	257.7 mm (10.1 in)
1974	197.1 mm (7.8 in)
1975	183.4 mm (7.2 in)
1976	105.4 mm (4.1 in)
1977	136.2 mm (5.4 in)
1978	206.0 mm (8.1 in)
1979	115.6 mm (4.6 in)
1980	290.3 mm (11.4 in)
1981	163.0 mm (6.4 in)
1982	182.4 mm (7.2 in)
1983	256.2 mm (10.1 in)
1984	76.8 mm (3.0 in)
1985	115.6 mm (4.6 in)
1986	295.9 mm (11.6 in)
1987	113.3 mm (4.5 in)
1988	143.8 mm (5.7 in)
1989	53.8 mm (2.1 in)
1990	108.3 mm (4.3 in)
1991	171.2 mm (6.7 in)
1992	243.8 mm (9.6 in)
1993	191.5 mm (7.5 in)
1994	111.0 mm (4.4 in)
1995	292.1 mm (11.5 in)
1996	196.7 mm (7.7 in)
1997	225.9 mm (8.9 in)
1998	159.5 mm (6.3 in)
1999	118.4 mm (4.7 in)
2000	263.1 mm (10.4 in)
2001	172.3 mm (6.8 in)
2002	223.3 mm (8.8 in)
2003	92.0 mm (3.6 in)
2004	298.9 mm (11.8 in)
2005	290.6 mm (11.4 in)
2006	236.5 mm (9.3 in)
2007	125.2 mm (4.9 in)
2008	189.7 mm (7.5 in)
2009	230.6 mm (9.1 in)
2010	294.1 mm (11.6 in)
2011	159.4 mm (6.3 in)
2012	149.6 mm (5.9 in)
2013	32.5 mm (1.3 in)
2014	176.7 mm (7.0 in)
2015	109.4 mm (4.3 in)
2016	133.9 mm (5.3 in)
2017	233.2 mm (9.2 in)
2018	197.3 mm (7.8 in)
2019	168.4 mm (6.6 in)
2020	92.7 mm (3.6 in)
2021	205.4 mm (8.1 in)
2022	141.4 mm (5.6 in)
2023	272.7 mm (10.7 in)
2024	112.5 mm (4.4 in)
2025	169.0 mm (6.7 in)
2026	148.6 mm (5.9 in)

Longest dry spell (CDD)

The longest dry spell of the year at Santa Margarita Boost, 1942 to 2026. The record is 218 days in 2012, marked on the chart; the median year is 129 days.

Longest dry spell (CDD) at Santa Margarita Boost by year
Year	Longest dry spell (CDD)
1942	23 days
1943	20 days
1944	30 days
1946	30 days
1947	27 days
1948	132 days
1949	141 days
1950	104 days
1951	136 days
1952	188 days
1953	187 days
1954	183 days
1955	189 days
1956	144 days
1957	108 days
1958	107 days
1959	81 days
1960	84 days
1961	108 days
1962	118 days
1963	85 days
1964	82 days
1965	158 days
1966	61 days
1967	75 days
1968	150 days
1969	135 days
1970	133 days
1971	124 days
1972	142 days
1973	166 days
1974	166 days
1975	166 days
1976	65 days
1977	145 days
1978	34 days
1979	91 days
1980	103 days
1981	180 days
1982	78 days
1983	104 days
1984	117 days
1985	182 days
1986	169 days
1987	175 days
1988	141 days
1989	108 days
1990	116 days
1991	117 days
1992	99 days
1993	127 days
1994	125 days
1995	136 days
1996	165 days
1997	199 days
1998	92 days
1999	111 days
2000	85 days
2001	191 days
2002	129 days
2003	93 days
2004	204 days
2005	122 days
2006	131 days
2007	128 days
2008	132 days
2009	128 days
2010	97 days
2011	119 days
2012	218 days
2013	154 days
2014	188 days
2015	75 days
2016	174 days
2017	119 days
2018	167 days
2019	183 days
2020	172 days
2021	154 days
2022	141 days
2023	164 days
2024	180 days
2025	149 days
2026	94 days

Each chart shows one value per year; the dot marks the record year. TXx is the hottest daily maximum, TNn the coldest daily minimum, Rx1day and Rx5day the largest one-day and five-day rain totals, and CDD the longest run of days with less than 1 mm of rain. A year with missing days can understate an extreme.

Rainfall Return Levels

76 years, 1948 to 2025

A day with at least 89.6 mm (3.5 in) of rain is expected about once in 2 years. A day with at least 206.0 mm (8.1 in) of rain is expected about once in 100 years.

Rainfall return levels at Santa Margarita Boost: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	89.6 mm (3.5 in)
5 years	121.3 mm (4.8 in)
10 years	142.1 mm (5.6 in)
25 years	168.1 mm (6.6 in)
50 years	187.2 mm (7.4 in)
100 years	206.0 mm (8.1 in)	Longer than the 76 years of record

The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 76 years of values from 1948 to 2025.

A return level is an estimate. It is least reliable for the long periods, 50 and 100 years, and for any period longer than the record behind the fit, where the fit has to reach past the largest day actually observed. It is not a forecast.

The largest wettest-day totals in the fit: 224.3 mm (8.8 in) in 2009; 200.7 mm (7.9 in) in 1966; 165.1 mm (6.5 in) in 1969.

Download the Data

Data for Santa Margarita Boost standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Santa Margarita Boost 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.

Data as of 2026-10-12. Last revised 12 October 2026 (2026-10-12).