Santa Ana River Ph 1 Weather Records (USC00047894)
Record envelope, standing records and threshold days for Santa Ana River Ph 1 (USC00047894), California, United States, with 65 years of record.
Key Facts for Santa Ana River Ph 1
Santa Ana River Ph 1 (USC00047894) is a weather station in California, United States at 34.13 latitude and -117.07 longitude, 845 m (2,772 ft) above sea level.
The station reports from 1903 to 1967, 65 years of record.
1,464 records set at Santa Ana River Ph 1 still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Santa Ana River Ph 1 set a daily record low minimum temperature of 1.7 C (35.1 F) on 26 April 1967.
About the Station
Location: California, United States, 34.13 latitude, -117.07 longitude.
Elevation: 845 m (2,772 ft).
Period of record: 1903 to 1967, 65 years.
Eligible elements: tmax, tmin, prcp.
Daily Record Envelope and 2026
0 days at or beyond a record
Record highRecord low2026 daily maximum2026 daily minimum
The band shows the record high and record low for each calendar day at Santa Ana River Ph 1. 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 Ana River Ph 1, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
27.8 C (82.0 F)
-8.9 C (16.0 F)
n/a
n/a
Feb
30.6 C (87.1 F)
-5.0 C (23.0 F)
n/a
n/a
Mar
30.6 C (87.1 F)
-4.4 C (24.1 F)
n/a
n/a
Apr
38.9 C (102.0 F)
-2.2 C (28.0 F)
n/a
n/a
May
42.2 C (108.0 F)
-1.1 C (30.0 F)
n/a
n/a
Jun
42.8 C (109.0 F)
2.8 C (37.0 F)
n/a
n/a
Jul
44.4 C (111.9 F)
4.4 C (39.9 F)
n/a
n/a
Aug
43.3 C (109.9 F)
5.6 C (42.1 F)
n/a
n/a
Sep
43.3 C (109.9 F)
3.3 C (37.9 F)
n/a
n/a
Oct
40.0 C (104.0 F)
-8.9 C (16.0 F)
n/a
n/a
Nov
35.6 C (96.1 F)
-3.9 C (25.0 F)
n/a
n/a
Dec
27.8 C (82.0 F)
-5.6 C (21.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Santa Ana River Ph 1 still stand. 1906 holds the most, with 57.
Standing records at Santa Ana River Ph 1 by the year they were set
Year set
Standing records
1904
48
1905
31
1906
57
1907
41
1908
22
1909
55
1910
48
1911
46
1912
44
1913
36
1914
11
1915
28
1916
19
1917
26
1918
35
1919
22
1920
33
1921
34
1922
40
1923
46
1924
34
1925
17
1926
14
1927
19
1928
21
1929
28
1930
33
1931
35
1932
28
1933
29
1934
50
1935
12
1936
32
1937
29
1938
29
1939
12
1940
7
1941
7
1942
20
1943
13
1944
17
1945
14
1946
9
1947
14
1948
16
1949
43
1950
32
1951
14
1952
10
1953
17
1954
16
1955
20
1956
20
1957
18
1958
7
1967
6
Wettest Day of Each Month
Jan: 228.6 mm (9.0 in)
The wettest day on record for each calendar month at Santa Ana River Ph 1. The most was 228.6 mm (9.0 in) on 17 January 1916.
Record daily precipitation for each month at Santa Ana River Ph 1
Month
Record daily precipitation (mm)
Date
Jan
228.6 mm (9.0 in)
17 January 1916
Feb
140.0 mm (5.5 in)
18 February 1917
Mar
78.7 mm (3.1 in)
2 March 1938
Apr
97.0 mm (3.8 in)
5 April 1926
May
47.0 mm (1.9 in)
1 May 1955
Jun
24.9 mm (1.0 in)
5 June 1934
Jul
15.2 mm (0.6 in)
17 July 1938
Aug
32.0 mm (1.3 in)
29 August 1931
Sep
94.2 mm (3.7 in)
25 September 1939
Oct
72.1 mm (2.8 in)
18 October 1934
Nov
65.3 mm (2.6 in)
22 November 1965
Dec
129.5 mm (5.1 in)
30 December 1951
Period of Record Coverage
1904 to 1967
Complete yearUnder 90 percent of days
56 years of record at Santa Ana River Ph 1, 1904 to 1967. 10 years have data for under 90 percent of days and are left out of rankings: 1904, 1907, 1908, 1910, 1911, 1912, 1914, 1916 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 43 complete years at Santa Ana River Ph 1, 1905 to 1957. Blue stripes are years cooler than the station's own mean of 16.3 C (61.4 F); red stripes are warmer. The coolest year was 1922, at 14.5 C (58.1 F), and the warmest was 1934, at 18.9 C (66.0 F). The strongest colour marks a difference of 2.6 C (4.7 F).
Annual mean temperature at Santa Ana River Ph 1 as warming stripes, 1905 to 1957
Year
Annual mean temperature
Difference from the station mean
1905
17.1 C
+0.75 C
1909
16.5 C
+0.19 C
1913
16.1 C
-0.25 C
1915
15.1 C
-1.24 C
1918
15.1 C
-1.30 C
1919
15.1 C
-1.21 C
1920
14.7 C
-1.70 C
1921
15.4 C
-0.96 C
1922
14.5 C
-1.83 C
1923
14.5 C
-1.83 C
1924
14.9 C
-1.43 C
1925
15.0 C
-1.40 C
1926
15.3 C
-1.08 C
1927
15.0 C
-1.31 C
1928
15.5 C
-0.86 C
1929
17.2 C
+0.81 C
1930
17.2 C
+0.85 C
1931
17.9 C
+1.54 C
1932
17.5 C
+1.19 C
1933
17.5 C
+1.15 C
1934
18.9 C
+2.53 C
1935
17.2 C
+0.81 C
1936
18.2 C
+1.89 C
1937
17.6 C
+1.26 C
1938
17.7 C
+1.36 C
1939
17.1 C
+0.77 C
1940
17.0 C
+0.68 C
1942
16.1 C
-0.27 C
1943
16.9 C
+0.58 C
1944
15.5 C
-0.90 C
1945
16.1 C
-0.29 C
1946
16.4 C
+0.04 C
1947
16.6 C
+0.26 C
1948
15.7 C
-0.62 C
1949
16.0 C
-0.39 C
1950
17.3 C
+0.91 C
1951
16.4 C
+0.05 C
1952
16.1 C
-0.22 C
1953
16.8 C
+0.42 C
1954
17.0 C
+0.69 C
1955
16.1 C
-0.26 C
1956
16.7 C
+0.33 C
1957
16.4 C
+0.08 C
The annual mean temperature here has risen by 0.24 C (0.01 to 0.48) per decade over 1905 to 1957. In Fahrenheit: 0.43 F (0.01 to 0.85) per decade. The slope is a straight line fitted to 43 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Santa Ana River Ph 1
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.24 C (0.01 to 0.48) per decade
0.43 F (0.01 to 0.86) per decade
1905 to 1957
43
Rise
Mean daily maximum
0.3 C (0.1 to 0.6) per decade
0.6 F (0.1 to 1.0) per decade
1905 to 1957
43
Rise
Mean daily minimum
0.2 C (-0.1 to 0.4) per decade
0.3 F (-0.2 to 0.8) per decade
1905 to 1957
43
Not clearly different from zero
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
1903 to 1967
Yearly extremes at Santa Ana River Ph 1: 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)
1911
39.4 C (102.9 F)
56
Coldest night (TNn)
-8.9 C (16.0 F)
1909
-2.8 C (27.0 F)
56
Wettest day (Rx1day)
228.6 mm (9.0 in)
1916
62.2 mm (2.4 in)
65
Wettest five days (Rx5day)
407.9 mm (16.1 in)
1916
114.0 mm (4.5 in)
65
Longest dry spell (CDD)
155 days
1944
70 days
65
Hottest day (TXx)
The hottest day of the year at Santa Ana River Ph 1, 1903 to 1967. The record is 44.4 C (111.9 F) in 1911, marked on the chart; the median year is 39.4 C (102.9 F).
Hottest day (TXx) at Santa Ana River Ph 1 by year
Year
Hottest day (TXx)
1903
n/a
1904
42.2 C (108.0 F)
1905
43.3 C (109.9 F)
1906
41.1 C (106.0 F)
1907
42.2 C (108.0 F)
1908
41.7 C (107.1 F)
1909
40.0 C (104.0 F)
1910
43.3 C (109.9 F)
1911
44.4 C (111.9 F)
1912
42.8 C (109.0 F)
1913
40.0 C (104.0 F)
1914
35.6 C (96.1 F)
1915
37.2 C (99.0 F)
1916
37.2 C (99.0 F)
1917
42.8 C (109.0 F)
1918
38.3 C (100.9 F)
1919
36.7 C (98.1 F)
1920
36.1 C (97.0 F)
1921
36.7 C (98.1 F)
1922
36.1 C (97.0 F)
1923
36.7 C (98.1 F)
1924
36.1 C (97.0 F)
1925
38.9 C (102.0 F)
1926
36.1 C (97.0 F)
1927
40.6 C (105.1 F)
1928
37.2 C (99.0 F)
1929
40.0 C (104.0 F)
1930
40.0 C (104.0 F)
1931
41.1 C (106.0 F)
1932
42.2 C (108.0 F)
1933
43.3 C (109.9 F)
1934
43.9 C (111.0 F)
1935
38.9 C (102.0 F)
1936
42.2 C (108.0 F)
1937
40.6 C (105.1 F)
1938
41.1 C (106.0 F)
1939
38.9 C (102.0 F)
1940
38.3 C (100.9 F)
1941
37.8 C (100.0 F)
1942
40.6 C (105.1 F)
1943
41.7 C (107.1 F)
1944
41.1 C (106.0 F)
1945
38.9 C (102.0 F)
1946
39.4 C (102.9 F)
1947
41.1 C (106.0 F)
1948
39.4 C (102.9 F)
1949
39.4 C (102.9 F)
1950
41.7 C (107.1 F)
1951
38.9 C (102.0 F)
1952
37.2 C (99.0 F)
1953
38.3 C (100.9 F)
1954
39.4 C (102.9 F)
1955
40.6 C (105.1 F)
1956
38.3 C (100.9 F)
1957
38.9 C (102.0 F)
1958
35.6 C (96.1 F)
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1965
n/a
1966
n/a
1967
21.1 C (70.0 F)
Coldest night (TNn)
The coldest night of the year at Santa Ana River Ph 1, 1903 to 1967. The record is -8.9 C (16.0 F) in 1909, marked on the chart; the median year is -2.8 C (27.0 F).
Coldest night (TNn) at Santa Ana River Ph 1 by year
Year
Coldest night (TNn)
1903
n/a
1904
-2.2 C (28.0 F)
1905
-4.4 C (24.1 F)
1906
-6.1 C (21.0 F)
1907
-4.4 C (24.1 F)
1908
-3.3 C (26.1 F)
1909
-8.9 C (16.0 F)
1910
-3.9 C (25.0 F)
1911
-5.6 C (21.9 F)
1912
-2.8 C (27.0 F)
1913
-8.9 C (16.0 F)
1914
-2.8 C (27.0 F)
1915
-3.3 C (26.1 F)
1916
-5.0 C (23.0 F)
1917
-2.8 C (27.0 F)
1918
-2.8 C (27.0 F)
1919
-3.9 C (25.0 F)
1920
-4.4 C (24.1 F)
1921
-3.3 C (26.1 F)
1922
-5.0 C (23.0 F)
1923
-3.9 C (25.0 F)
1924
-5.6 C (21.9 F)
1925
-2.2 C (28.0 F)
1926
-3.3 C (26.1 F)
1927
-1.7 C (28.9 F)
1928
-3.3 C (26.1 F)
1929
-3.3 C (26.1 F)
1930
-1.1 C (30.0 F)
1931
-2.2 C (28.0 F)
1932
-4.4 C (24.1 F)
1933
-2.2 C (28.0 F)
1934
0.6 C (33.1 F)
1935
-2.2 C (28.0 F)
1936
-1.1 C (30.0 F)
1937
-6.1 C (21.0 F)
1938
-0.6 C (30.9 F)
1939
-1.7 C (28.9 F)
1940
0.0 C (32.0 F)
1941
-1.7 C (28.9 F)
1942
-2.8 C (27.0 F)
1943
-1.7 C (28.9 F)
1944
-1.1 C (30.0 F)
1945
-2.2 C (28.0 F)
1946
-1.7 C (28.9 F)
1947
-2.2 C (28.0 F)
1948
-4.4 C (24.1 F)
1949
-7.2 C (19.0 F)
1950
-3.9 C (25.0 F)
1951
-5.0 C (23.0 F)
1952
-2.8 C (27.0 F)
1953
-3.9 C (25.0 F)
1954
-2.8 C (27.0 F)
1955
-2.8 C (27.0 F)
1956
-2.2 C (28.0 F)
1957
-4.4 C (24.1 F)
1958
0.6 C (33.1 F)
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1965
n/a
1966
n/a
1967
0.0 C (32.0 F)
Wettest day (Rx1day)
The wettest day of the year at Santa Ana River Ph 1, 1903 to 1967. The record is 228.6 mm (9.0 in) in 1916, marked on the chart; the median year is 62.2 mm (2.4 in).
Wettest day (Rx1day) at Santa Ana River Ph 1 by year
Year
Wettest day (Rx1day)
1903
0.0 mm (0.00 in)
1904
46.5 mm (1.8 in)
1905
76.5 mm (3.0 in)
1906
61.5 mm (2.4 in)
1907
61.5 mm (2.4 in)
1908
66.5 mm (2.6 in)
1909
96.0 mm (3.8 in)
1910
25.4 mm (1.0 in)
1911
63.5 mm (2.5 in)
1912
57.7 mm (2.3 in)
1913
49.3 mm (1.9 in)
1914
91.4 mm (3.6 in)
1915
73.7 mm (2.9 in)
1916
228.6 mm (9.0 in)
1917
140.0 mm (5.5 in)
1918
64.0 mm (2.5 in)
1919
50.8 mm (2.0 in)
1920
60.2 mm (2.4 in)
1921
95.3 mm (3.8 in)
1922
76.5 mm (3.0 in)
1923
46.7 mm (1.8 in)
1924
49.5 mm (1.9 in)
1925
62.2 mm (2.4 in)
1926
97.0 mm (3.8 in)
1927
104.9 mm (4.1 in)
1928
28.7 mm (1.1 in)
1929
88.4 mm (3.5 in)
1930
52.1 mm (2.1 in)
1931
85.6 mm (3.4 in)
1932
72.9 mm (2.9 in)
1933
91.9 mm (3.6 in)
1934
72.1 mm (2.8 in)
1935
43.9 mm (1.7 in)
1936
87.1 mm (3.4 in)
1937
119.4 mm (4.7 in)
1938
78.7 mm (3.1 in)
1939
94.2 mm (3.7 in)
1940
71.6 mm (2.8 in)
1941
71.6 mm (2.8 in)
1942
52.1 mm (2.1 in)
1943
111.3 mm (4.4 in)
1944
56.9 mm (2.2 in)
1945
92.2 mm (3.6 in)
1946
50.3 mm (2.0 in)
1947
41.4 mm (1.6 in)
1948
48.5 mm (1.9 in)
1949
77.0 mm (3.0 in)
1950
59.4 mm (2.3 in)
1951
129.5 mm (5.1 in)
1952
69.9 mm (2.8 in)
1953
40.1 mm (1.6 in)
1954
104.6 mm (4.1 in)
1955
47.0 mm (1.9 in)
1956
114.3 mm (4.5 in)
1957
41.7 mm (1.6 in)
1958
61.0 mm (2.4 in)
1959
33.3 mm (1.3 in)
1960
47.5 mm (1.9 in)
1961
59.9 mm (2.4 in)
1962
60.7 mm (2.4 in)
1963
40.4 mm (1.6 in)
1964
48.8 mm (1.9 in)
1965
65.3 mm (2.6 in)
1966
31.2 mm (1.2 in)
1967
36.6 mm (1.4 in)
Wettest five days (Rx5day)
The wettest five days of the year at Santa Ana River Ph 1, 1903 to 1967. The record is 407.9 mm (16.1 in) in 1916, marked on the chart; the median year is 114.0 mm (4.5 in).
Wettest five days (Rx5day) at Santa Ana River Ph 1 by year
Year
Wettest five days (Rx5day)
1903
0.0 mm (0.00 in)
1904
86.9 mm (3.4 in)
1905
194.4 mm (7.7 in)
1906
67.3 mm (2.6 in)
1907
111.6 mm (4.4 in)
1908
170.7 mm (6.7 in)
1909
154.5 mm (6.1 in)
1910
98.1 mm (3.9 in)
1911
138.0 mm (5.4 in)
1912
153.1 mm (6.0 in)
1913
94.2 mm (3.7 in)
1914
234.8 mm (9.2 in)
1915
177.6 mm (7.0 in)
1916
407.9 mm (16.1 in)
1917
194.1 mm (7.6 in)
1918
174.3 mm (6.9 in)
1919
91.5 mm (3.6 in)
1920
140.2 mm (5.5 in)
1921
285.2 mm (11.2 in)
1922
140.0 mm (5.5 in)
1923
83.8 mm (3.3 in)
1924
115.1 mm (4.5 in)
1925
58.7 mm (2.3 in)
1926
247.2 mm (9.7 in)
1927
289.1 mm (11.4 in)
1928
52.3 mm (2.1 in)
1929
112.0 mm (4.4 in)
1930
162.1 mm (6.4 in)
1931
106.5 mm (4.2 in)
1932
125.5 mm (4.9 in)
1933
114.0 mm (4.5 in)
1934
185.9 mm (7.3 in)
1935
99.0 mm (3.9 in)
1936
268.9 mm (10.6 in)
1937
187.5 mm (7.4 in)
1938
177.3 mm (7.0 in)
1939
112.5 mm (4.4 in)
1940
122.9 mm (4.8 in)
1941
90.4 mm (3.6 in)
1942
73.4 mm (2.9 in)
1943
226.1 mm (8.9 in)
1944
140.7 mm (5.5 in)
1945
191.5 mm (7.5 in)
1946
87.7 mm (3.5 in)
1947
78.3 mm (3.1 in)
1948
104.4 mm (4.1 in)
1949
100.4 mm (4.0 in)
1950
91.6 mm (3.6 in)
1951
188.9 mm (7.4 in)
1952
188.9 mm (7.4 in)
1953
50.2 mm (2.0 in)
1954
159.2 mm (6.3 in)
1955
70.5 mm (2.8 in)
1956
223.6 mm (8.8 in)
1957
81.8 mm (3.2 in)
1958
125.7 mm (4.9 in)
1959
106.1 mm (4.2 in)
1960
64.1 mm (2.5 in)
1961
66.2 mm (2.6 in)
1962
134.9 mm (5.3 in)
1963
85.9 mm (3.4 in)
1964
84.4 mm (3.3 in)
1965
111.0 mm (4.4 in)
1966
60.4 mm (2.4 in)
1967
80.3 mm (3.2 in)
Longest dry spell (CDD)
The longest dry spell of the year at Santa Ana River Ph 1, 1903 to 1967. The record is 155 days in 1944, marked on the chart; the median year is 70 days.
Longest dry spell (CDD) at Santa Ana River Ph 1 by year
Year
Longest dry spell (CDD)
1903
31 days
1904
31 days
1905
27 days
1906
34 days
1907
40 days
1908
44 days
1909
58 days
1910
93 days
1911
63 days
1912
144 days
1913
64 days
1914
67 days
1915
111 days
1916
35 days
1917
55 days
1918
27 days
1919
47 days
1920
41 days
1921
37 days
1922
56 days
1923
41 days
1924
100 days
1925
57 days
1926
89 days
1927
96 days
1928
154 days
1929
104 days
1930
145 days
1931
61 days
1932
116 days
1933
68 days
1934
73 days
1935
72 days
1936
56 days
1937
105 days
1938
61 days
1939
97 days
1940
142 days
1941
65 days
1942
103 days
1943
114 days
1944
155 days
1945
62 days
1946
106 days
1947
70 days
1948
137 days
1949
69 days
1950
125 days
1951
64 days
1952
65 days
1953
75 days
1954
71 days
1955
91 days
1956
71 days
1957
122 days
1958
92 days
1959
78 days
1960
77 days
1961
92 days
1962
100 days
1963
55 days
1964
59 days
1965
56 days
1966
130 days
1967
31 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
31 years with a frost
Across 31 years with a frost, the median last spring frost at Santa Ana River Ph 1 falls on 21 March and the median first autumn frost on 30 November, which leaves a median of 251 days between them.
Fitted over all years, the growing season changes by +5.9 days per decade at this station.
Frost dates and growing season at Santa Ana River Ph 1
Measure
Median, all years
Earliest period
Recent period (1909 to 1956)
Recent against earliest
Fitted trend
Last spring frost
21 March
n/a
23 March
n/a
-3.1 days per decade
First autumn frost
30 November
n/a
2 December
n/a
+2.8 days per decade
Growing days
251 days
n/a
251 days
n/a
+5.9 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
50 years, 1909 to 1966
A day with at least 66.0 mm (2.6 in) of rain is expected about once in 2 years. A day with at least 153.2 mm (6.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Santa Ana River Ph 1: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
66.0 mm (2.6 in)
5 years
91.3 mm (3.6 in)
10 years
107.3 mm (4.2 in)
25 years
126.5 mm (5.0 in)
50 years
140.2 mm (5.5 in)
100 years
153.2 mm (6.0 in)
Longer than the 50 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, 50 years of values from 1909 to 1966.
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: 140.0 mm (5.5 in) in 1917; 129.5 mm (5.1 in) in 1951; 119.4 mm (4.7 in) in 1937.
Download the Data
Data for Santa Ana River Ph 1 standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Santa Ana River Ph 1 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 2026-10-14 (14 October 2026). Records are computed by this site and are not official.