Record envelope, standing records and threshold days for Bonita (USC00040968), California, United States, with 56 years of record.
Key Facts for Bonita
Bonita (USC00040968) is a weather station in California, United States at 32.67 latitude and -117.03 longitude, 34 m (112 ft) above sea level.
The station reports from 1915 to 1970, 56 years of record.
1,464 records set at Bonita still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Bonita tied a daily record low maximum temperature of 14.4 C (57.9 F) on 30 December 1970.
About the Station
Location: California, United States, 32.67 latitude, -117.03 longitude.
Elevation: 34 m (112 ft).
Period of record: 1915 to 1970, 56 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 Bonita. 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 Bonita, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
31.1 C (88.0 F)
-6.7 C (19.9 F)
n/a
n/a
Feb
34.4 C (93.9 F)
-3.9 C (25.0 F)
n/a
n/a
Mar
33.9 C (93.0 F)
-1.1 C (30.0 F)
n/a
n/a
Apr
38.9 C (102.0 F)
0.6 C (33.1 F)
n/a
n/a
May
37.8 C (100.0 F)
1.7 C (35.1 F)
n/a
n/a
Jun
38.3 C (100.9 F)
3.9 C (39.0 F)
n/a
n/a
Jul
39.4 C (102.9 F)
5.0 C (41.0 F)
n/a
n/a
Aug
37.8 C (100.0 F)
8.3 C (46.9 F)
n/a
n/a
Sep
43.9 C (111.0 F)
3.9 C (39.0 F)
n/a
n/a
Oct
41.1 C (106.0 F)
2.2 C (36.0 F)
n/a
n/a
Nov
37.8 C (100.0 F)
-2.2 C (28.0 F)
n/a
n/a
Dec
33.9 C (93.0 F)
-4.4 C (24.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Bonita still stand. 1931 holds the most, with 69.
Standing records at Bonita by the year they were set
Year set
Standing records
1915
1
1916
28
1917
29
1918
38
1919
34
1920
29
1921
27
1922
32
1923
17
1924
28
1925
32
1926
38
1927
18
1928
33
1929
34
1930
31
1931
69
1932
18
1933
42
1934
31
1935
27
1936
15
1937
26
1938
25
1939
37
1940
41
1941
22
1942
16
1943
26
1944
29
1945
21
1946
12
1947
18
1948
28
1949
42
1950
29
1951
20
1952
20
1953
29
1954
25
1955
17
1956
18
1957
19
1958
33
1959
40
1960
23
1961
18
1962
11
1963
31
1964
13
1965
27
1966
10
1967
45
1968
29
1969
11
1970
2
All-Time Record Progression
4 new records
4 all-time records were set at Bonita between 11 January 1949 and 26 September 1963. Each dot is a new record.
When Bonita set new all-time records
Date
Kind
Detail
1949-01-11
Record low maximum temperature
Record low maximum temperature 7.2 C (45.0 F)
1955-09-03
Record high maximum temperature
Record high maximum temperature 43.9 C (111.0 F)
1963-01-13
Record low minimum temperature
Record low minimum temperature -6.7 C (19.9 F)
1963-09-26
Record high minimum temperature
Record high minimum temperature 23.3 C (73.9 F)
Wettest Day of Each Month
Dec: 94.0 mm (3.7 in)
The wettest day on record for each calendar month at Bonita. The most was 94.0 mm (3.7 in) on 24 December 1940.
Record daily precipitation for each month at Bonita
Month
Record daily precipitation (mm)
Date
Jan
54.9 mm (2.2 in)
18 January 1916
Feb
89.9 mm (3.5 in)
7 February 1937
Mar
60.2 mm (2.4 in)
16 March 1952
Apr
56.9 mm (2.2 in)
6 April 1926
May
43.7 mm (1.7 in)
1 May 1930
Jun
10.9 mm (0.4 in)
10 June 1957
Jul
3.6 mm (0.14 in)
9 July 1950
Aug
16.8 mm (0.7 in)
29 August 1951
Sep
36.8 mm (1.4 in)
6 September 1939
Oct
75.7 mm (3.0 in)
5 October 1925
Nov
45.0 mm (1.8 in)
23 November 1965
Dec
94.0 mm (3.7 in)
24 December 1940
Period of Record Coverage
1915 to 1970
Complete yearUnder 90 percent of days
56 years of record at Bonita, 1915 to 1970. 5 years have data for under 90 percent of days and are left out of rankings: 1915, 1956, 1968, 1969, 1970.
Cooler than the station meanWarmer than the station mean
One stripe for each of 37 complete years at Bonita, 1917 to 1966. Blue stripes are years cooler than the station's own mean of 16.4 C (61.5 F); red stripes are warmer. The coolest year was 1933, at 14.8 C (58.7 F), and the warmest was 1959, at 18.2 C (64.7 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Bonita as warming stripes, 1917 to 1966
Year
Annual mean temperature
Difference from the station mean
1917
16.3 C
-0.12 C
1918
17.0 C
+0.58 C
1919
16.0 C
-0.39 C
1921
16.3 C
-0.11 C
1922
16.0 C
-0.46 C
1925
16.3 C
-0.13 C
1926
17.1 C
+0.70 C
1927
16.3 C
-0.12 C
1928
15.9 C
-0.50 C
1929
16.2 C
-0.25 C
1930
16.1 C
-0.29 C
1931
17.1 C
+0.64 C
1932
15.5 C
-0.88 C
1933
14.8 C
-1.59 C
1936
16.8 C
+0.39 C
1937
16.1 C
-0.28 C
1940
16.8 C
+0.37 C
1941
16.4 C
-0.02 C
1942
15.9 C
-0.56 C
1944
15.6 C
-0.77 C
1946
16.2 C
-0.24 C
1949
15.6 C
-0.79 C
1950
15.9 C
-0.51 C
1951
16.1 C
-0.35 C
1952
16.2 C
-0.25 C
1953
16.5 C
+0.06 C
1954
16.4 C
-0.03 C
1957
17.2 C
+0.82 C
1958
17.9 C
+1.46 C
1959
18.2 C
+1.76 C
1960
17.2 C
+0.83 C
1961
17.2 C
+0.75 C
1962
16.2 C
-0.17 C
1963
17.3 C
+0.87 C
1964
16.3 C
-0.11 C
1965
16.3 C
-0.07 C
1966
16.3 C
-0.13 C
The fitted trend in annual mean temperature here over 1917 to 1966 is 0.13 C (-0.01 to 0.27) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.24 F (-0.01 to 0.49) per decade. The slope is a straight line fitted to 37 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Bonita
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.13 C (-0.01 to 0.27) per decade
0.24 F (-0.01 to 0.49) per decade
1917 to 1966
37
Not clearly different from zero
Mean daily maximum
0.1 C (-0.1 to 0.2) per decade
0.1 F (-0.2 to 0.4) per decade
1917 to 1966
37
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.1 to 0.6) per decade
1917 to 1966
37
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
1915 to 1970
Yearly extremes at Bonita: 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)
1955
36.7 C (98.1 F)
56
Coldest night (TNn)
-6.7 C (19.9 F)
1963
-2.2 C (28.0 F)
56
Wettest day (Rx1day)
94.0 mm (3.7 in)
1940
36.1 mm (1.4 in)
56
Wettest five days (Rx5day)
154.8 mm (6.1 in)
1927
67.0 mm (2.6 in)
56
Longest dry spell (CDD)
199 days
1966
114 days
56
Hottest day (TXx)
The hottest day of the year at Bonita, 1915 to 1970. The record is 43.9 C (111.0 F) in 1955, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Bonita by year
Year
Hottest day (TXx)
1915
31.1 C (88.0 F)
1916
33.3 C (91.9 F)
1917
38.9 C (102.0 F)
1918
40.6 C (105.1 F)
1919
38.9 C (102.0 F)
1920
37.8 C (100.0 F)
1921
36.7 C (98.1 F)
1922
40.6 C (105.1 F)
1923
35.0 C (95.0 F)
1924
40.0 C (104.0 F)
1925
35.0 C (95.0 F)
1926
36.7 C (98.1 F)
1927
36.7 C (98.1 F)
1928
34.4 C (93.9 F)
1929
37.2 C (99.0 F)
1930
39.4 C (102.9 F)
1931
36.7 C (98.1 F)
1932
35.0 C (95.0 F)
1933
35.6 C (96.1 F)
1934
37.2 C (99.0 F)
1935
35.6 C (96.1 F)
1936
36.7 C (98.1 F)
1937
35.6 C (96.1 F)
1938
36.7 C (98.1 F)
1939
41.7 C (107.1 F)
1940
38.9 C (102.0 F)
1941
34.4 C (93.9 F)
1942
36.7 C (98.1 F)
1943
35.6 C (96.1 F)
1944
35.6 C (96.1 F)
1945
35.6 C (96.1 F)
1946
36.1 C (97.0 F)
1947
36.1 C (97.0 F)
1948
36.7 C (98.1 F)
1949
37.8 C (100.0 F)
1950
40.0 C (104.0 F)
1951
36.1 C (97.0 F)
1952
36.7 C (98.1 F)
1953
38.9 C (102.0 F)
1954
36.1 C (97.0 F)
1955
43.9 C (111.0 F)
1956
42.2 C (108.0 F)
1957
38.3 C (100.9 F)
1958
41.1 C (106.0 F)
1959
38.3 C (100.9 F)
1960
37.8 C (100.0 F)
1961
40.6 C (105.1 F)
1962
37.8 C (100.0 F)
1963
42.2 C (108.0 F)
1964
36.7 C (98.1 F)
1965
40.0 C (104.0 F)
1966
36.1 C (97.0 F)
1967
37.8 C (100.0 F)
1968
37.8 C (100.0 F)
1969
37.8 C (100.0 F)
1970
29.4 C (84.9 F)
Coldest night (TNn)
The coldest night of the year at Bonita, 1915 to 1970. The record is -6.7 C (19.9 F) in 1963, marked on the chart; the median year is -2.2 C (28.0 F).
Coldest night (TNn) at Bonita by year
Year
Coldest night (TNn)
1915
0.6 C (33.1 F)
1916
-3.9 C (25.0 F)
1917
-3.3 C (26.1 F)
1918
-2.2 C (28.0 F)
1919
-4.4 C (24.1 F)
1920
-1.7 C (28.9 F)
1921
-1.1 C (30.0 F)
1922
-2.8 C (27.0 F)
1923
-0.6 C (30.9 F)
1924
-1.7 C (28.9 F)
1925
-1.1 C (30.0 F)
1926
-1.7 C (28.9 F)
1927
-3.3 C (26.1 F)
1928
-2.2 C (28.0 F)
1929
-3.9 C (25.0 F)
1930
-2.8 C (27.0 F)
1931
-2.2 C (28.0 F)
1932
-4.4 C (24.1 F)
1933
-2.2 C (28.0 F)
1934
0.0 C (32.0 F)
1935
-1.1 C (30.0 F)
1936
0.0 C (32.0 F)
1937
-6.1 C (21.0 F)
1938
-1.7 C (28.9 F)
1939
-2.2 C (28.0 F)
1940
-0.6 C (30.9 F)
1941
-2.2 C (28.0 F)
1942
-2.2 C (28.0 F)
1943
-1.7 C (28.9 F)
1944
-0.6 C (30.9 F)
1945
-0.6 C (30.9 F)
1946
-1.1 C (30.0 F)
1947
-3.3 C (26.1 F)
1948
-3.9 C (25.0 F)
1949
-3.9 C (25.0 F)
1950
-3.9 C (25.0 F)
1951
-2.2 C (28.0 F)
1952
-2.2 C (28.0 F)
1953
-2.2 C (28.0 F)
1954
-4.4 C (24.1 F)
1955
-1.7 C (28.9 F)
1956
-1.1 C (30.0 F)
1957
0.6 C (33.1 F)
1958
-0.6 C (30.9 F)
1959
0.0 C (32.0 F)
1960
-3.3 C (26.1 F)
1961
0.6 C (33.1 F)
1962
-1.7 C (28.9 F)
1963
-6.7 C (19.9 F)
1964
-2.2 C (28.0 F)
1965
-2.8 C (27.0 F)
1966
-3.9 C (25.0 F)
1967
-2.2 C (28.0 F)
1968
-2.8 C (27.0 F)
1969
-2.8 C (27.0 F)
1970
-2.2 C (28.0 F)
Wettest day (Rx1day)
The wettest day of the year at Bonita, 1915 to 1970. The record is 94.0 mm (3.7 in) in 1940, marked on the chart; the median year is 36.1 mm (1.4 in).
Wettest day (Rx1day) at Bonita by year
Year
Wettest day (Rx1day)
1915
21.3 mm (0.8 in)
1916
54.9 mm (2.2 in)
1917
26.4 mm (1.0 in)
1918
30.5 mm (1.2 in)
1919
19.1 mm (0.8 in)
1920
30.5 mm (1.2 in)
1921
74.2 mm (2.9 in)
1922
43.9 mm (1.7 in)
1923
26.2 mm (1.0 in)
1924
32.5 mm (1.3 in)
1925
75.7 mm (3.0 in)
1926
56.9 mm (2.2 in)
1927
62.0 mm (2.4 in)
1928
25.9 mm (1.0 in)
1929
32.0 mm (1.3 in)
1930
43.7 mm (1.7 in)
1931
63.5 mm (2.5 in)
1932
33.8 mm (1.3 in)
1933
38.6 mm (1.5 in)
1934
19.8 mm (0.8 in)
1935
54.4 mm (2.1 in)
1936
41.1 mm (1.6 in)
1937
89.9 mm (3.5 in)
1938
27.2 mm (1.1 in)
1939
36.8 mm (1.4 in)
1940
94.0 mm (3.7 in)
1941
54.4 mm (2.1 in)
1942
26.4 mm (1.0 in)
1943
48.8 mm (1.9 in)
1944
38.4 mm (1.5 in)
1945
39.9 mm (1.6 in)
1946
32.5 mm (1.3 in)
1947
41.9 mm (1.6 in)
1948
22.4 mm (0.9 in)
1949
35.6 mm (1.4 in)
1950
22.9 mm (0.9 in)
1951
32.5 mm (1.3 in)
1952
60.2 mm (2.4 in)
1953
15.5 mm (0.6 in)
1954
35.6 mm (1.4 in)
1955
27.2 mm (1.1 in)
1956
31.2 mm (1.2 in)
1957
28.7 mm (1.1 in)
1958
40.9 mm (1.6 in)
1959
30.2 mm (1.2 in)
1960
26.9 mm (1.1 in)
1961
23.1 mm (0.9 in)
1962
36.6 mm (1.4 in)
1963
28.2 mm (1.1 in)
1964
18.3 mm (0.7 in)
1965
45.0 mm (1.8 in)
1966
45.7 mm (1.8 in)
1967
43.2 mm (1.7 in)
1968
56.4 mm (2.2 in)
1969
44.2 mm (1.7 in)
1970
38.9 mm (1.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Bonita, 1915 to 1970. The record is 154.8 mm (6.1 in) in 1927, marked on the chart; the median year is 67.0 mm (2.6 in).
Wettest five days (Rx5day) at Bonita by year
Year
Wettest five days (Rx5day)
1915
29.2 mm (1.1 in)
1916
130.3 mm (5.1 in)
1917
3.8 mm (0.15 in)
1918
77.0 mm (3.0 in)
1919
30.3 mm (1.2 in)
1920
62.7 mm (2.5 in)
1921
111.5 mm (4.4 in)
1922
62.2 mm (2.4 in)
1923
53.0 mm (2.1 in)
1924
14.5 mm (0.6 in)
1925
96.8 mm (3.8 in)
1926
124.9 mm (4.9 in)
1927
154.8 mm (6.1 in)
1928
37.0 mm (1.5 in)
1929
36.0 mm (1.4 in)
1930
81.8 mm (3.2 in)
1931
97.5 mm (3.8 in)
1932
66.3 mm (2.6 in)
1933
85.6 mm (3.4 in)
1934
49.0 mm (1.9 in)
1935
115.7 mm (4.6 in)
1936
83.3 mm (3.3 in)
1937
99.9 mm (3.9 in)
1938
82.3 mm (3.2 in)
1939
65.7 mm (2.6 in)
1940
123.7 mm (4.9 in)
1941
107.1 mm (4.2 in)
1942
32.7 mm (1.3 in)
1943
123.7 mm (4.9 in)
1944
67.1 mm (2.6 in)
1945
81.4 mm (3.2 in)
1946
49.3 mm (1.9 in)
1947
70.9 mm (2.8 in)
1948
43.5 mm (1.7 in)
1949
78.1 mm (3.1 in)
1950
28.5 mm (1.1 in)
1951
54.1 mm (2.1 in)
1952
89.4 mm (3.5 in)
1953
20.9 mm (0.8 in)
1954
105.4 mm (4.1 in)
1955
42.9 mm (1.7 in)
1956
38.1 mm (1.5 in)
1957
66.9 mm (2.6 in)
1958
57.2 mm (2.3 in)
1959
48.6 mm (1.9 in)
1960
57.4 mm (2.3 in)
1961
25.4 mm (1.0 in)
1962
75.2 mm (3.0 in)
1963
36.6 mm (1.4 in)
1964
42.0 mm (1.7 in)
1965
93.7 mm (3.7 in)
1966
93.2 mm (3.7 in)
1967
71.3 mm (2.8 in)
1968
57.9 mm (2.3 in)
1969
72.4 mm (2.9 in)
1970
84.4 mm (3.3 in)
Longest dry spell (CDD)
The longest dry spell of the year at Bonita, 1915 to 1970. The record is 199 days in 1966, marked on the chart; the median year is 114 days.
Longest dry spell (CDD) at Bonita by year
Year
Longest dry spell (CDD)
1915
22 days
1916
61 days
1917
30 days
1918
115 days
1919
127 days
1920
82 days
1921
83 days
1922
18 days
1923
23 days
1924
20 days
1925
96 days
1926
149 days
1927
136 days
1928
156 days
1929
103 days
1930
143 days
1931
78 days
1932
126 days
1933
176 days
1934
73 days
1935
104 days
1936
101 days
1937
100 days
1938
108 days
1939
134 days
1940
100 days
1941
85 days
1942
165 days
1943
63 days
1944
168 days
1945
87 days
1946
178 days
1947
112 days
1948
151 days
1949
151 days
1950
127 days
1951
119 days
1952
156 days
1953
110 days
1954
120 days
1955
172 days
1956
172 days
1957
122 days
1958
135 days
1959
157 days
1960
117 days
1961
193 days
1962
185 days
1963
83 days
1964
185 days
1965
105 days
1966
199 days
1967
65 days
1968
106 days
1969
70 days
1970
13 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
22 years with a frost
Across 22 years with a frost, the median last spring frost at Bonita falls on 22 February and the median first autumn frost on 12 December, which leaves a median of 295 days between them.
Frost dates and growing season at Bonita
Measure
Median, all years
Earliest period
Recent period (1917 to 1966)
Recent against earliest
Fitted trend
Last spring frost
22 February
n/a
22 February
n/a
n/a
First autumn frost
12 December
n/a
12 December
n/a
n/a
Growing days
295 days
n/a
295 days
n/a
n/a
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
44 years, 1920 to 1968
A day with at least 36.5 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 104.7 mm (4.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Bonita: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
36.5 mm (1.4 in)
5 years
51.7 mm (2.0 in)
10 years
62.9 mm (2.5 in)
25 years
78.5 mm (3.1 in)
50 years
91.1 mm (3.6 in)
Longer than the 44 years of record
100 years
104.7 mm (4.1 in)
Longer than the 44 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, 44 years of values from 1920 to 1968.
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: 94.0 mm (3.7 in) in 1940; 89.9 mm (3.5 in) in 1937; 74.2 mm (2.9 in) in 1921.
Download the Data
Data for Bonita standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Bonita 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.