Tustin Irvine Rch Weather Records (USC00049087)

Record envelope, standing records and threshold days for Tustin Irvine Rch (USC00049087), California, United States, with 102 years of record.

Key Facts for Tustin Irvine Rch

Tustin Irvine Rch (USC00049087) is a weather station in California, United States at 33.70 latitude and -117.75 longitude, 72 m (235 ft) above sea level.
The station reports from 1902 to 2003, 102 years of record.
1,464 records set at Tustin Irvine Rch still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Tustin Irvine Rch set a daily record low maximum temperature of 17.8 C (64.0 F) on 21 June 2003.

About the Station

Location: California, United States, 33.70 latitude, -117.75 longitude.
Elevation: 72 m (235 ft).
Period of record: 1902 to 2003, 102 years.
Eligible elements: tmax, tmin, 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 Tustin Irvine Rch. 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 Tustin Irvine Rch, with 2026 drawn through them
Month	Highest record high	Lowest record low	2026 highest maximum	2026 lowest minimum
Jan	35.0 C (95.0 F)	-7.8 C (18.0 F)	n/a	n/a
Feb	33.9 C (93.0 F)	-3.9 C (25.0 F)	n/a	n/a
Mar	36.7 C (98.1 F)	-3.3 C (26.1 F)	n/a	n/a
Apr	41.1 C (106.0 F)	-0.6 C (30.9 F)	n/a	n/a
May	40.6 C (105.1 F)	1.1 C (34.0 F)	n/a	n/a
Jun	42.8 C (109.0 F)	2.8 C (37.0 F)	n/a	n/a
Jul	43.3 C (109.9 F)	5.0 C (41.0 F)	n/a	n/a
Aug	43.3 C (109.9 F)	5.6 C (42.1 F)	n/a	n/a
Sep	43.9 C (111.0 F)	3.9 C (39.0 F)	n/a	n/a
Oct	42.2 C (108.0 F)	-1.7 C (28.9 F)	n/a	n/a
Nov	40.6 C (105.1 F)	-3.9 C (25.0 F)	n/a	n/a
Dec	36.1 C (97.0 F)	-5.0 C (23.0 F)	n/a	n/a

Which Years Hold Standing Records

1,464 standing records

1,464 records at Tustin Irvine Rch still stand. 1997 holds the most, with 52.

Standing records at Tustin Irvine Rch by the year they were set
Year set	Standing records
1915	8
1916	45
1917	37
1918	24
1919	29
1920	20
1921	37
1922	33
1923	30
1924	37
1925	13
1926	26
1927	22
1928	26
1929	14
1930	26
1931	44
1932	16
1933	17
1934	38
1935	27
1936	27
1937	36
1938	19
1939	26
1940	11
1941	10
1942	9
1943	13
1944	9
1945	14
1946	12
1947	7
1948	17
1949	24
1950	23
1951	13
1952	13
1953	24
1954	8
1955	14
1956	16
1957	11
1958	14
1959	10
1960	7
1961	8
1962	10
1963	8
1964	9
1965	13
1966	6
1967	7
1968	7
1969	9
1970	7
1971	16
1972	15
1973	9
1974	2
1975	15
1976	7
1977	6
1978	10
1979	27
1980	15
1981	18
1982	23
1983	16
1984	27
1985	15
1986	7
1987	8
1988	19
1989	13
1990	7
1991	6
1992	4
1993	6
1994	14
1995	10
1996	8
1997	52
1998	19
1999	10
2000	6
2001	6
2002	1
2003	7

All-Time Record Progression

4 new records

4 all-time records were set at Tustin Irvine Rch between 26 January 1956 and 6 December 1997. Each dot is a new record.

When Tustin Irvine Rch set new all-time records
Date	Kind	Detail
1956-01-26	Record daily precipitation	Record daily precipitation 114.8 mm (4.5 in)
1963-09-26	Record high maximum temperature	Record high maximum temperature 43.9 C (111.0 F)
1984-09-09	Record high minimum temperature	Record high minimum temperature 25.6 C (78.1 F)
1997-12-06	Record daily precipitation	Record daily precipitation 131.3 mm (5.2 in)

Wettest Day of Each Month

Dec: 131.3 mm (5.2 in)

The wettest day on record for each calendar month at Tustin Irvine Rch. The most was 131.3 mm (5.2 in) on 6 December 1997.

Record daily precipitation for each month at Tustin Irvine Rch
Month	Record daily precipitation (mm)	Date
Jan	114.8 mm (4.5 in)	26 January 1956
Feb	101.6 mm (4.0 in)	7 February 1937
Mar	93.2 mm (3.7 in)	13 March 1905
Apr	105.2 mm (4.1 in)	6 April 1926
May	46.2 mm (1.8 in)	9 May 1977
Jun	34.5 mm (1.4 in)	5 June 1993
Jul	3.0 mm (0.12 in)	30 July 1965
Aug	29.0 mm (1.1 in)	17 August 1977
Sep	78.0 mm (3.1 in)	25 September 1939
Oct	38.1 mm (1.5 in)	30 October 1920
Nov	82.8 mm (3.3 in)	22 November 1996
Dec	131.3 mm (5.2 in)	6 December 1997

Period of Record Coverage

1915 to 2003

89 years of record at Tustin Irvine Rch, 1915 to 2003. 6 years have data for under 90 percent of days and are left out of rankings: 1943, 1980, 1982, 1995, 2001, 2003.

Days with data per year at Tustin Irvine Rch
Year	Days with data	Share of year	Complete
1915	365	100%	Yes
1916	365	100%	Yes
1917	358	98%	Yes
1918	364	100%	Yes
1919	365	100%	Yes
1920	365	100%	Yes
1921	361	99%	Yes
1922	365	100%	Yes
1923	365	100%	Yes
1924	366	100%	Yes
1925	365	100%	Yes
1926	334	92%	Yes
1927	365	100%	Yes
1928	358	98%	Yes
1929	365	100%	Yes
1930	352	96%	Yes
1931	346	95%	Yes
1932	364	99%	Yes
1933	365	100%	Yes
1934	356	98%	Yes
1935	356	98%	Yes
1936	366	100%	Yes
1937	357	98%	Yes
1938	364	100%	Yes
1939	365	100%	Yes
1940	364	99%	Yes
1941	363	99%	Yes
1942	361	99%	Yes
1943	296	81%	No
1944	366	100%	Yes
1945	357	98%	Yes
1946	356	98%	Yes
1947	365	100%	Yes
1948	357	98%	Yes
1949	365	100%	Yes
1950	363	99%	Yes
1951	364	100%	Yes
1952	366	100%	Yes
1953	365	100%	Yes
1954	359	98%	Yes
1955	348	95%	Yes
1956	358	98%	Yes
1957	359	98%	Yes
1958	359	98%	Yes
1959	357	98%	Yes
1960	360	98%	Yes
1961	363	99%	Yes
1962	364	100%	Yes
1963	362	99%	Yes
1964	335	92%	Yes
1965	362	99%	Yes
1966	363	99%	Yes
1967	364	100%	Yes
1968	358	98%	Yes
1969	365	100%	Yes
1970	364	100%	Yes
1971	363	99%	Yes
1972	337	92%	Yes
1973	365	100%	Yes
1974	363	99%	Yes
1975	362	99%	Yes
1976	363	99%	Yes
1977	365	100%	Yes
1978	363	99%	Yes
1979	364	100%	Yes
1980	321	88%	No
1981	356	98%	Yes
1982	324	89%	No
1983	346	95%	Yes
1984	365	100%	Yes
1985	335	92%	Yes
1986	335	92%	Yes
1987	355	97%	Yes
1988	347	95%	Yes
1989	349	96%	Yes
1990	345	95%	Yes
1991	353	97%	Yes
1992	354	97%	Yes
1993	357	98%	Yes
1994	353	97%	Yes
1995	263	72%	No
1996	357	98%	Yes
1997	360	99%	Yes
1998	359	98%	Yes
1999	356	98%	Yes
2000	345	94%	Yes
2001	328	90%	No
2002	340	93%	Yes
2003	179	49%	No

Latest Records

Latest records at Tustin Irvine Rch
Date	Station	Record	Value	Beat old record by	Old record stood	Significance
21 June 2003	Tustin Irvine Rch, US	daily low max	17.8 C (64.0 F)	0.5 C (0.9 F)	57 years	26 of 100 (Routine)
20 June 2003	Tustin Irvine Rch, US	daily low max	18.3 C (64.9 F)	1.1 C (2.0 F)	28 years	19 of 100 (Routine)
19 June 2003	Tustin Irvine Rch, US	daily low max	18.9 C (66.0 F)	0.5 C (0.9 F)	28 years	17 of 100 (Routine)
3 May 2003	Tustin Irvine Rch, US	daily rain	13.7 mm (0.5 in)	9.4 mm (0.37 in)	68 years	20 of 100 (Routine)
14 April 2003	Tustin Irvine Rch, US	daily rain	43.9 mm (1.7 in)	21.3 mm (0.8 in)	14 years	36 of 100 (Notable)
31 March 2003	Tustin Irvine Rch, US	daily high max	31.1 C (88.0 F)	0.5 C (0.9 F)	36 years	20 of 100 (Routine)
27 March 2003	Tustin Irvine Rch, US	monthly high min	17.2 C (63.0 F)	0.5 C (0.9 F)	10 years	22 of 100 (Routine)
26 March 2003	Tustin Irvine Rch, US	daily high min (Tie)	14.4 C (57.9 F)	tie	74 years	7 of 100 (Routine)
17 March 2003	Tustin Irvine Rch, US	daily rain	79.8 mm (3.1 in)	59.2 mm (2.3 in)	40 years	62 of 100 (Major)
31 January 2003	Tustin Irvine Rch, US	daily high max	34.4 C (93.9 F)	5.5 C (9.9 F)	49 years	34 of 100 (Routine)
26 January 2003	Tustin Irvine Rch, US	daily high max (Tie)	29.4 C (84.9 F)	tie	52 years	5 of 100 (Routine)
7 January 2003	Tustin Irvine Rch, US	daily high max (Tie)	28.9 C (84.0 F)	tie	40 years	5 of 100 (Routine)
2 January 2003	Tustin Irvine Rch, US	daily high max	28.3 C (82.9 F)	0.5 C (0.9 F)	23 years	15 of 100 (Routine)
21 November 2002	Tustin Irvine Rch, US	daily high max (Tie)	32.2 C (90.0 F)	tie	77 years	7 of 100 (Routine)
20 November 2002	Tustin Irvine Rch, US	daily high max (Tie)	34.4 C (93.9 F)	tie	84 years	8 of 100 (Routine)
19 November 2002	Tustin Irvine Rch, US	daily high max (Tie)	32.2 C (90.0 F)	tie	84 years	8 of 100 (Routine)
10 November 2002	Tustin Irvine Rch, US	daily rain	41.4 mm (1.6 in)	2.3 mm (0.09 in)	20 years	18 of 100 (Routine)
6 July 2002	Tustin Irvine Rch, US	daily low max	22.2 C (72.0 F)	0.6 C (1.1 F)	85 years	35 of 100 (Notable)
20 May 2002	Tustin Irvine Rch, US	daily rain	2.5 mm (0.10 in)	0.7 mm (0.03 in)	29 years	19 of 100 (Routine)
20 May 2002	Tustin Irvine Rch, US	daily low max (Tie)	16.7 C (62.1 F)	tie	27 years	4 of 100 (Routine)

Climate Trend

76 complete years, 1915 to 2002

One stripe for each of 76 complete years at Tustin Irvine Rch, 1915 to 2002. Blue stripes are years cooler than the station's own mean of 16.9 C (62.4 F); red stripes are warmer. The coolest year was 1916, at 15.0 C (59.1 F), and the warmest was 1997, at 20.3 C (68.6 F). The strongest colour marks a difference of 3.5 C (6.3 F).

Annual mean temperature at Tustin Irvine Rch as warming stripes, 1915 to 2002
Year	Annual mean temperature	Difference from the station mean
1915	16.2 C	-0.64 C
1916	15.0 C	-1.84 C
1917	15.5 C	-1.40 C
1918	16.1 C	-0.79 C
1919	16.2 C	-0.69 C
1920	15.6 C	-1.27 C
1921	16.0 C	-0.93 C
1922	15.7 C	-1.17 C
1923	15.8 C	-1.08 C
1924	15.9 C	-0.99 C
1925	17.0 C	+0.12 C
1927	17.2 C	+0.29 C
1928	18.3 C	+1.45 C
1929	17.6 C	+0.74 C
1930	17.3 C	+0.46 C
1931	18.6 C	+1.71 C
1932	17.0 C	+0.10 C
1933	16.9 C	+0.06 C
1934	19.4 C	+2.47 C
1935	16.8 C	-0.07 C
1936	15.6 C	-1.26 C
1937	15.5 C	-1.35 C
1938	16.4 C	-0.51 C
1939	16.5 C	-0.39 C
1940	17.6 C	+0.67 C
1941	17.0 C	+0.16 C
1942	16.8 C	-0.11 C
1944	16.1 C	-0.75 C
1945	16.3 C	-0.58 C
1946	16.0 C	-0.91 C
1947	16.8 C	-0.12 C
1948	15.4 C	-1.44 C
1949	16.0 C	-0.89 C
1950	16.5 C	-0.41 C
1951	16.1 C	-0.74 C
1952	15.7 C	-1.14 C
1953	16.1 C	-0.81 C
1954	16.6 C	-0.28 C
1955	16.1 C	-0.78 C
1956	16.6 C	-0.24 C
1957	17.1 C	+0.22 C
1958	17.8 C	+0.92 C
1959	17.8 C	+0.94 C
1960	16.6 C	-0.32 C
1961	16.6 C	-0.27 C
1962	16.1 C	-0.83 C
1963	17.0 C	+0.07 C
1965	16.6 C	-0.32 C
1966	16.9 C	+0.04 C
1967	17.2 C	+0.30 C
1969	16.8 C	-0.09 C
1970	17.0 C	+0.14 C
1971	16.2 C	-0.68 C
1972	16.0 C	-0.86 C
1974	16.8 C	-0.06 C
1975	15.6 C	-1.32 C
1976	17.3 C	+0.43 C
1977	17.3 C	+0.42 C
1978	17.5 C	+0.59 C
1979	17.3 C	+0.45 C
1984	18.4 C	+1.49 C
1987	17.1 C	+0.21 C
1988	17.6 C	+0.75 C
1989	17.2 C	+0.30 C
1990	17.3 C	+0.39 C
1991	16.9 C	+0.03 C
1992	17.9 C	+1.01 C
1993	17.8 C	+0.96 C
1994	17.8 C	+0.89 C
1996	18.9 C	+1.99 C
1997	20.3 C	+3.46 C
1998	18.9 C	+2.01 C
1999	18.3 C	+1.43 C
2000	17.5 C	+0.63 C
2001	17.2 C	+0.30 C
2002	16.6 C	-0.29 C

The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1915 to 2002. In Fahrenheit: 0.3 F (0.2 to 0.5) per decade. The slope is a straight line fitted to 76 complete years; the brackets give its 95 percent interval.

Fitted temperature trends per decade at Tustin Irvine Rch
Measure	Per decade (C)	Per decade (F)	Period	Complete years	Reading
Annual mean temperature	0.2 C (0.1 to 0.3) per decade	0.3 F (0.2 to 0.5) per decade	1915 to 2002	76	Rise
Mean daily maximum	0.11 C (0.02 to 0.20) per decade	0.20 F (0.03 to 0.36) per decade	1915 to 2002	76	Rise
Mean daily minimum	0.3 C (0.2 to 0.3) per decade	0.5 F (0.3 to 0.6) per decade	1915 to 2002	76	Rise

A year is complete when all 12 months have at least 20 days of both daily maximum and daily minimum readings. The annual mean is the mean of the monthly means. The trend describes this one station over this period; it does not say what caused the change.

Extremes by Year

1902 to 2003

Yearly extremes at Tustin Irvine Rch: the record and the median year
Measure	Record	Year of the record	Median year	Years with a value
Hottest day (TXx)	43.9 C (111.0 F)	1963	39.4 C (102.9 F)	89
Coldest night (TNn)	-7.8 C (18.0 F)	1937	-1.7 C (28.9 F)	89
Wettest day (Rx1day)	131.3 mm (5.2 in)	1997	41.9 mm (1.6 in)	102
Wettest five days (Rx5day)	180.9 mm (7.1 in)	1956	71.9 mm (2.8 in)	102
Longest dry spell (CDD)	263 days	1999	120 days	102

Hottest day (TXx)

The hottest day of the year at Tustin Irvine Rch, 1902 to 2003. The record is 43.9 C (111.0 F) in 1963, marked on the chart; the median year is 39.4 C (102.9 F).

Hottest day (TXx) at Tustin Irvine Rch by year
Year	Hottest day (TXx)
1902	n/a
1903	n/a
1904	n/a
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	38.3 C (100.9 F)
1916	36.7 C (98.1 F)
1917	41.7 C (107.1 F)
1918	39.4 C (102.9 F)
1919	36.7 C (98.1 F)
1920	35.6 C (96.1 F)
1921	38.9 C (102.0 F)
1922	40.6 C (105.1 F)
1923	36.7 C (98.1 F)
1924	40.6 C (105.1 F)
1925	36.1 C (97.0 F)
1926	36.1 C (97.0 F)
1927	38.9 C (102.0 F)
1928	41.1 C (106.0 F)
1929	42.2 C (108.0 F)
1930	38.9 C (102.0 F)
1931	39.4 C (102.9 F)
1932	37.8 C (100.0 F)
1933	38.9 C (102.0 F)
1934	41.7 C (107.1 F)
1935	38.3 C (100.9 F)
1936	36.1 C (97.0 F)
1937	38.3 C (100.9 F)
1938	36.7 C (98.1 F)
1939	43.3 C (109.9 F)
1940	40.6 C (105.1 F)
1941	37.2 C (99.0 F)
1942	40.6 C (105.1 F)
1943	38.3 C (100.9 F)
1944	39.4 C (102.9 F)
1945	38.9 C (102.0 F)
1946	37.2 C (99.0 F)
1947	39.4 C (102.9 F)
1948	37.2 C (99.0 F)
1949	40.6 C (105.1 F)
1950	41.1 C (106.0 F)
1951	37.8 C (100.0 F)
1952	37.8 C (100.0 F)
1953	40.0 C (104.0 F)
1954	37.2 C (99.0 F)
1955	43.3 C (109.9 F)
1956	40.6 C (105.1 F)
1957	38.9 C (102.0 F)
1958	41.7 C (107.1 F)
1959	38.3 C (100.9 F)
1960	40.6 C (105.1 F)
1961	41.7 C (107.1 F)
1962	36.1 C (97.0 F)
1963	43.9 C (111.0 F)
1964	37.8 C (100.0 F)
1965	39.4 C (102.9 F)
1966	37.8 C (100.0 F)
1967	38.9 C (102.0 F)
1968	37.2 C (99.0 F)
1969	40.0 C (104.0 F)
1970	40.0 C (104.0 F)
1971	42.2 C (108.0 F)
1972	38.3 C (100.9 F)
1973	38.9 C (102.0 F)
1974	37.2 C (99.0 F)
1975	39.4 C (102.9 F)
1976	40.6 C (105.1 F)
1977	37.2 C (99.0 F)
1978	40.6 C (105.1 F)
1979	42.8 C (109.0 F)
1980	36.1 C (97.0 F)
1981	40.6 C (105.1 F)
1982	38.3 C (100.9 F)
1983	40.0 C (104.0 F)
1984	42.2 C (108.0 F)
1985	43.3 C (109.9 F)
1986	37.8 C (100.0 F)
1987	40.6 C (105.1 F)
1988	42.2 C (108.0 F)
1989	41.1 C (106.0 F)
1990	41.1 C (106.0 F)
1991	40.6 C (105.1 F)
1992	37.8 C (100.0 F)
1993	36.7 C (98.1 F)
1994	41.7 C (107.1 F)
1995	38.9 C (102.0 F)
1996	38.9 C (102.0 F)
1997	43.3 C (109.9 F)
1998	40.6 C (105.1 F)
1999	41.1 C (106.0 F)
2000	35.6 C (96.1 F)
2001	40.0 C (104.0 F)
2002	40.0 C (104.0 F)
2003	34.4 C (93.9 F)

Coldest night (TNn)

The coldest night of the year at Tustin Irvine Rch, 1902 to 2003. The record is -7.8 C (18.0 F) in 1937, marked on the chart; the median year is -1.7 C (28.9 F).

Coldest night (TNn) at Tustin Irvine Rch by year
Year	Coldest night (TNn)
1902	n/a
1903	n/a
1904	n/a
1905	n/a
1906	n/a
1907	n/a
1908	n/a
1909	n/a
1910	n/a
1911	n/a
1912	n/a
1913	n/a
1914	n/a
1915	0.0 C (32.0 F)
1916	-2.2 C (28.0 F)
1917	-2.2 C (28.0 F)
1918	-4.4 C (24.1 F)
1919	-5.0 C (23.0 F)
1920	-2.8 C (27.0 F)
1921	-3.9 C (25.0 F)
1922	-5.0 C (23.0 F)
1923	-1.1 C (30.0 F)
1924	-5.0 C (23.0 F)
1925	-0.6 C (30.9 F)
1926	-2.2 C (28.0 F)
1927	0.0 C (32.0 F)
1928	-1.7 C (28.9 F)
1929	-2.2 C (28.0 F)
1930	-1.7 C (28.9 F)
1931	-1.7 C (28.9 F)
1932	-1.1 C (30.0 F)
1933	0.0 C (32.0 F)
1934	2.2 C (36.0 F)
1935	-3.3 C (26.1 F)
1936	-3.3 C (26.1 F)
1937	-7.8 C (18.0 F)
1938	-3.9 C (25.0 F)
1939	-3.3 C (26.1 F)
1940	-0.6 C (30.9 F)
1941	-1.1 C (30.0 F)
1942	-2.8 C (27.0 F)
1943	-2.8 C (27.0 F)
1944	-1.1 C (30.0 F)
1945	-2.8 C (27.0 F)
1946	-3.3 C (26.1 F)
1947	-1.7 C (28.9 F)
1948	-2.8 C (27.0 F)
1949	-3.9 C (25.0 F)
1950	-3.9 C (25.0 F)
1951	-2.2 C (28.0 F)
1952	-2.8 C (27.0 F)
1953	-3.9 C (25.0 F)
1954	-2.8 C (27.0 F)
1955	-2.2 C (28.0 F)
1956	-2.8 C (27.0 F)
1957	0.0 C (32.0 F)
1958	-3.3 C (26.1 F)
1959	0.0 C (32.0 F)
1960	-2.8 C (27.0 F)
1961	-0.6 C (30.9 F)
1962	-2.8 C (27.0 F)
1963	-2.2 C (28.0 F)
1964	-1.7 C (28.9 F)
1965	-2.2 C (28.0 F)
1966	-1.7 C (28.9 F)
1967	-0.6 C (30.9 F)
1968	-4.4 C (24.1 F)
1969	-1.1 C (30.0 F)
1970	-1.1 C (30.0 F)
1971	-2.2 C (28.0 F)
1972	-2.8 C (27.0 F)
1973	1.1 C (34.0 F)
1974	-0.6 C (30.9 F)
1975	-1.1 C (30.0 F)
1976	-2.2 C (28.0 F)
1977	0.6 C (33.1 F)
1978	0.0 C (32.0 F)
1979	-2.2 C (28.0 F)
1980	0.6 C (33.1 F)
1981	-2.2 C (28.0 F)
1982	-1.7 C (28.9 F)
1983	-0.6 C (30.9 F)
1984	0.6 C (33.1 F)
1985	-1.1 C (30.0 F)
1986	0.6 C (33.1 F)
1987	-2.2 C (28.0 F)
1988	-1.7 C (28.9 F)
1989	-2.2 C (28.0 F)
1990	-3.3 C (26.1 F)
1991	0.6 C (33.1 F)
1992	-1.7 C (28.9 F)
1993	-1.7 C (28.9 F)
1994	-2.2 C (28.0 F)
1995	-0.6 C (30.9 F)
1996	0.6 C (33.1 F)
1997	1.7 C (35.1 F)
1998	-3.9 C (25.0 F)
1999	2.2 C (36.0 F)
2000	-0.6 C (30.9 F)
2001	-1.1 C (30.0 F)
2002	0.0 C (32.0 F)
2003	2.2 C (36.0 F)

Wettest day (Rx1day)

The wettest day of the year at Tustin Irvine Rch, 1902 to 2003. The record is 131.3 mm (5.2 in) in 1997, marked on the chart; the median year is 41.9 mm (1.6 in).

Wettest day (Rx1day) at Tustin Irvine Rch by year
Year	Wettest day (Rx1day)
1902	41.9 mm (1.6 in)
1903	82.6 mm (3.3 in)
1904	36.8 mm (1.4 in)
1905	93.2 mm (3.7 in)
1906	31.8 mm (1.3 in)
1907	42.7 mm (1.7 in)
1908	25.9 mm (1.0 in)
1909	53.6 mm (2.1 in)
1910	42.9 mm (1.7 in)
1911	27.2 mm (1.1 in)
1912	41.9 mm (1.6 in)
1913	33.5 mm (1.3 in)
1914	47.2 mm (1.9 in)
1915	39.1 mm (1.5 in)
1916	44.5 mm (1.8 in)
1917	17.8 mm (0.7 in)
1918	29.5 mm (1.2 in)
1919	17.8 mm (0.7 in)
1920	38.1 mm (1.5 in)
1921	38.9 mm (1.5 in)
1922	41.4 mm (1.6 in)
1923	41.9 mm (1.6 in)
1924	30.2 mm (1.2 in)
1925	34.3 mm (1.4 in)
1926	105.2 mm (4.1 in)
1927	96.0 mm (3.8 in)
1928	22.1 mm (0.9 in)
1929	21.6 mm (0.9 in)
1930	71.9 mm (2.8 in)
1931	50.8 mm (2.0 in)
1932	26.7 mm (1.1 in)
1933	41.9 mm (1.6 in)
1934	41.1 mm (1.6 in)
1935	27.4 mm (1.1 in)
1936	36.3 mm (1.4 in)
1937	101.6 mm (4.0 in)
1938	62.2 mm (2.4 in)
1939	78.0 mm (3.1 in)
1940	47.0 mm (1.9 in)
1941	54.4 mm (2.1 in)
1942	27.4 mm (1.1 in)
1943	98.3 mm (3.9 in)
1944	77.0 mm (3.0 in)
1945	55.9 mm (2.2 in)
1946	47.0 mm (1.9 in)
1947	31.8 mm (1.3 in)
1948	26.4 mm (1.0 in)
1949	33.0 mm (1.3 in)
1950	21.8 mm (0.9 in)
1951	76.7 mm (3.0 in)
1952	74.4 mm (2.9 in)
1953	15.5 mm (0.6 in)
1954	50.8 mm (2.0 in)
1955	22.9 mm (0.9 in)
1956	114.8 mm (4.5 in)
1957	40.6 mm (1.6 in)
1958	43.9 mm (1.7 in)
1959	31.5 mm (1.2 in)
1960	41.4 mm (1.6 in)
1961	34.8 mm (1.4 in)
1962	44.5 mm (1.8 in)
1963	51.3 mm (2.0 in)
1964	23.1 mm (0.9 in)
1965	47.5 mm (1.9 in)
1966	43.2 mm (1.7 in)
1967	36.1 mm (1.4 in)
1968	34.5 mm (1.4 in)
1969	83.3 mm (3.3 in)
1970	55.9 mm (2.2 in)
1971	25.4 mm (1.0 in)
1972	18.3 mm (0.7 in)
1973	38.9 mm (1.5 in)
1974	49.3 mm (1.9 in)
1975	28.2 mm (1.1 in)
1976	26.2 mm (1.0 in)
1977	50.3 mm (2.0 in)
1978	49.0 mm (1.9 in)
1979	45.7 mm (1.8 in)
1980	72.1 mm (2.8 in)
1981	49.8 mm (2.0 in)
1982	47.8 mm (1.9 in)
1983	67.6 mm (2.7 in)
1984	30.5 mm (1.2 in)
1985	36.1 mm (1.4 in)
1986	58.4 mm (2.3 in)
1987	30.0 mm (1.2 in)
1988	31.2 mm (1.2 in)
1989	15.0 mm (0.6 in)
1990	42.7 mm (1.7 in)
1991	49.8 mm (2.0 in)
1992	50.8 mm (2.0 in)
1993	56.6 mm (2.2 in)
1994	29.5 mm (1.2 in)
1995	75.2 mm (3.0 in)
1996	82.8 mm (3.3 in)
1997	131.3 mm (5.2 in)
1998	75.4 mm (3.0 in)
1999	27.7 mm (1.1 in)
2000	32.0 mm (1.3 in)
2001	74.9 mm (2.9 in)
2002	41.4 mm (1.6 in)
2003	79.8 mm (3.1 in)

Wettest five days (Rx5day)

The wettest five days of the year at Tustin Irvine Rch, 1902 to 2003. The record is 180.9 mm (7.1 in) in 1956, marked on the chart; the median year is 71.9 mm (2.8 in).

Wettest five days (Rx5day) at Tustin Irvine Rch by year
Year	Wettest five days (Rx5day)
1902	74.7 mm (2.9 in)
1903	92.5 mm (3.6 in)
1904	45.7 mm (1.8 in)
1905	144.3 mm (5.7 in)
1906	69.1 mm (2.7 in)
1907	108.2 mm (4.3 in)
1908	60.5 mm (2.4 in)
1909	78.5 mm (3.1 in)
1910	75.2 mm (3.0 in)
1911	55.4 mm (2.2 in)
1912	63.0 mm (2.5 in)
1913	71.7 mm (2.8 in)
1914	123.1 mm (4.8 in)
1915	78.2 mm (3.1 in)
1916	103.9 mm (4.1 in)
1917	35.6 mm (1.4 in)
1918	78.8 mm (3.1 in)
1919	51.9 mm (2.0 in)
1920	48.3 mm (1.9 in)
1921	113.6 mm (4.5 in)
1922	60.7 mm (2.4 in)
1923	42.7 mm (1.7 in)
1924	35.5 mm (1.4 in)
1925	37.9 mm (1.5 in)
1926	144.1 mm (5.7 in)
1927	147.9 mm (5.8 in)
1928	38.8 mm (1.5 in)
1929	34.0 mm (1.3 in)
1930	92.1 mm (3.6 in)
1931	54.3 mm (2.1 in)
1932	53.2 mm (2.1 in)
1933	93.8 mm (3.7 in)
1934	73.6 mm (2.9 in)
1935	29.9 mm (1.2 in)
1936	89.5 mm (3.5 in)
1937	127.8 mm (5.0 in)
1938	162.0 mm (6.4 in)
1939	82.3 mm (3.2 in)
1940	77.2 mm (3.0 in)
1941	101.1 mm (4.0 in)
1942	37.8 mm (1.5 in)
1943	160.8 mm (6.3 in)
1944	140.8 mm (5.5 in)
1945	112.3 mm (4.4 in)
1946	111.3 mm (4.4 in)
1947	50.1 mm (2.0 in)
1948	36.3 mm (1.4 in)
1949	46.5 mm (1.8 in)
1950	43.3 mm (1.7 in)
1951	92.2 mm (3.6 in)
1952	149.8 mm (5.9 in)
1953	20.9 mm (0.8 in)
1954	55.6 mm (2.2 in)
1955	23.0 mm (0.9 in)
1956	180.9 mm (7.1 in)
1957	52.1 mm (2.1 in)
1958	96.3 mm (3.8 in)
1959	33.7 mm (1.3 in)
1960	56.2 mm (2.2 in)
1961	43.4 mm (1.7 in)
1962	91.2 mm (3.6 in)
1963	59.9 mm (2.4 in)
1964	34.3 mm (1.4 in)
1965	72.1 mm (2.8 in)
1966	138.4 mm (5.4 in)
1967	65.8 mm (2.6 in)
1968	34.8 mm (1.4 in)
1969	163.8 mm (6.4 in)
1970	77.9 mm (3.1 in)
1971	70.4 mm (2.8 in)
1972	40.4 mm (1.6 in)
1973	58.5 mm (2.3 in)
1974	96.1 mm (3.8 in)
1975	49.5 mm (1.9 in)
1976	56.4 mm (2.2 in)
1977	79.7 mm (3.1 in)
1978	129.5 mm (5.1 in)
1979	65.0 mm (2.6 in)
1980	88.4 mm (3.5 in)
1981	57.7 mm (2.3 in)
1982	83.9 mm (3.3 in)
1983	143.8 mm (5.7 in)
1984	51.6 mm (2.0 in)
1985	47.5 mm (1.9 in)
1986	111.0 mm (4.4 in)
1987	43.7 mm (1.7 in)
1988	57.7 mm (2.3 in)
1989	17.8 mm (0.7 in)
1990	62.3 mm (2.5 in)
1991	108.0 mm (4.3 in)
1992	112.6 mm (4.4 in)
1993	167.4 mm (6.6 in)
1994	53.1 mm (2.1 in)
1995	120.2 mm (4.7 in)
1996	133.1 mm (5.2 in)
1997	155.2 mm (6.1 in)
1998	131.2 mm (5.2 in)
1999	42.6 mm (1.7 in)
2000	55.6 mm (2.2 in)
2001	87.6 mm (3.4 in)
2002	48.7 mm (1.9 in)
2003	79.8 mm (3.1 in)

Longest dry spell (CDD)

The longest dry spell of the year at Tustin Irvine Rch, 1902 to 2003. The record is 263 days in 1999, marked on the chart; the median year is 120 days.

Longest dry spell (CDD) at Tustin Irvine Rch by year
Year	Longest dry spell (CDD)
1902	152 days
1903	161 days
1904	28 days
1905	51 days
1906	56 days
1907	26 days
1908	35 days
1909	97 days
1910	181 days
1911	154 days
1912	146 days
1913	97 days
1914	120 days
1915	31 days
1916	20 days
1917	31 days
1918	72 days
1919	35 days
1920	79 days
1921	64 days
1922	29 days
1923	30 days
1924	37 days
1925	56 days
1926	124 days
1927	173 days
1928	89 days
1929	92 days
1930	107 days
1931	68 days
1932	155 days
1933	85 days
1934	72 days
1935	164 days
1936	101 days
1937	161 days
1938	147 days
1939	141 days
1940	142 days
1941	78 days
1942	75 days
1943	139 days
1944	190 days
1945	51 days
1946	142 days
1947	112 days
1948	70 days
1949	151 days
1950	180 days
1951	109 days
1952	146 days
1953	183 days
1954	196 days
1955	83 days
1956	146 days
1957	122 days
1958	92 days
1959	189 days
1960	158 days
1961	129 days
1962	153 days
1963	85 days
1964	86 days
1965	107 days
1966	153 days
1967	125 days
1968	161 days
1969	116 days
1970	239 days
1971	137 days
1972	151 days
1973	235 days
1974	154 days
1975	164 days
1976	89 days
1977	121 days
1978	127 days
1979	134 days
1980	156 days
1981	126 days
1982	32 days
1983	105 days
1984	91 days
1985	118 days
1986	106 days
1987	79 days
1988	122 days
1989	100 days
1990	163 days
1991	208 days
1992	102 days
1993	127 days
1994	55 days
1995	73 days
1996	194 days
1997	215 days
1998	110 days
1999	263 days
2000	120 days
2001	154 days
2002	158 days
2003	58 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.

Frost Dates and Growing Season

48 years with a frost

Across 48 years with a frost, the median last spring frost at Tustin Irvine Rch falls on 3 March and the median first autumn frost on 6 December, which leaves a median of 285 days between them.

Fitted over all years, the growing season changes by +6.7 days per decade at this station.

Frost dates and growing season at Tustin Irvine Rch
Measure	Median, all years	Earliest period	Recent period (1939 to 1992)	Recent against earliest	Fitted trend
Last spring frost	3 March	n/a	3 March	n/a	-3.4 days per decade
First autumn frost	6 December	n/a	9 December	n/a	+3.4 days per decade
Growing days	285 days	n/a	294 days	n/a	+6.7 days per decade

A frost day is a day with a daily minimum at or below 0 C (32 F). The last spring frost and the first autumn frost are the last and first such days of the cold season, and growing days are the days between them. A negative trend for the last spring frost means it comes earlier.

Rainfall Return Levels

82 years, 1902 to 2002

A day with at least 42.2 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 133.5 mm (5.3 in) of rain is expected about once in 100 years.

Rainfall return levels at Tustin Irvine Rch: the daily rain expected about once in a given number of years
Expected about once in	A day with at least	Note
2 years	42.2 mm (1.7 in)
5 years	62.2 mm (2.4 in)
10 years	77.1 mm (3.0 in)
25 years	97.9 mm (3.9 in)
50 years	115.0 mm (4.5 in)
100 years	133.5 mm (5.3 in)	Longer than the 82 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, 82 years of values from 1902 to 2002.

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: 131.3 mm (5.2 in) in 1997; 114.8 mm (4.5 in) in 1956; 101.6 mm (4.0 in) in 1937.

Station Changes

2 suspected

2 changes were suspected in the annual mean temperature of Tustin Irvine Rch, at 1960 and 1996. Each is measured against neighbouring stations.

Relative to 5 neighbouring stations, the station's annual mean temperature from 1960 ran 0.5 C (0.8 F) lower than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1996 ran 1.0 C (1.7 F) higher than in the years before (likely change).

Suspected changes in the annual mean temperature at Tustin Irvine Rch, against neighbouring stations
Year	Shift (C)	Shift (F)	Strength	Neighbours
1960	-0.5	-0.8	likely	5
1996	+1.0	+1.7	likely	5

Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.

Download the Data

Data for Tustin Irvine Rch standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Tustin Irvine Rch 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). Records are computed by this site and are not official.

Data as of 2025-12-31. Last revised 31 December 2025 (2025-12-31).