Record envelope, standing records and threshold days for Clearlake Park (USC00041807), California, United States, with 44 years of record.
Key Facts for Clearlake Park
Clearlake Park (USC00041807) is a weather station in California, United States at 38.98 latitude and -122.72 longitude, 406 m (1,332 ft) above sea level.
The station reports from 1911 to 1954, 44 years of record.
1,464 records set at Clearlake Park still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Clearlake Park set a daily record high minimum temperature of 12.8 C (55.0 F) on 22 October 1954.
About the Station
Location: California, United States, 38.98 latitude, -122.72 longitude.
Elevation: 406 m (1,332 ft).
Period of record: 1911 to 1954, 44 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 Clearlake Park. 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 Clearlake Park, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
25.6 C (78.1 F)
-11.7 C (10.9 F)
n/a
n/a
Feb
25.6 C (78.1 F)
-8.3 C (17.1 F)
n/a
n/a
Mar
31.7 C (89.1 F)
-6.7 C (19.9 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-5.0 C (23.0 F)
n/a
n/a
May
38.3 C (100.9 F)
-6.1 C (21.0 F)
n/a
n/a
Jun
42.2 C (108.0 F)
1.1 C (34.0 F)
n/a
n/a
Jul
42.2 C (108.0 F)
5.6 C (42.1 F)
n/a
n/a
Aug
43.3 C (109.9 F)
2.8 C (37.0 F)
n/a
n/a
Sep
41.7 C (107.1 F)
-2.8 C (27.0 F)
n/a
n/a
Oct
37.8 C (100.0 F)
-3.9 C (25.0 F)
n/a
n/a
Nov
30.0 C (86.0 F)
-8.9 C (16.0 F)
n/a
n/a
Dec
25.6 C (78.1 F)
-13.9 C (7.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Clearlake Park still stand. 1916 holds the most, with 92.
Standing records at Clearlake Park by the year they were set
Year set
Standing records
1911
8
1912
31
1913
32
1914
66
1915
51
1916
92
1917
38
1918
32
1919
13
1921
21
1922
32
1923
22
1924
80
1925
80
1926
32
1927
30
1928
17
1929
35
1930
15
1931
21
1932
66
1933
54
1934
31
1935
35
1936
40
1937
34
1938
27
1939
34
1940
22
1941
30
1942
34
1943
20
1944
24
1945
28
1946
18
1947
18
1948
40
1949
32
1950
42
1951
21
1952
28
1953
20
1954
18
Wettest Day of Each Month
Jan: 194.3 mm (7.6 in)
The wettest day on record for each calendar month at Clearlake Park. The most was 194.3 mm (7.6 in) on 30 January 1926.
Record daily precipitation for each month at Clearlake Park
Month
Record daily precipitation (mm)
Date
Jan
194.3 mm (7.6 in)
30 January 1926
Feb
100.3 mm (3.9 in)
11 February 1925
Mar
59.9 mm (2.4 in)
10 March 1949
Apr
57.2 mm (2.3 in)
3 April 1926
May
29.2 mm (1.1 in)
13 May 1925
Jun
22.6 mm (0.9 in)
7 June 1936
Jul
8.6 mm (0.34 in)
1 July 1916
Aug
13.7 mm (0.5 in)
14 August 1916
Sep
48.0 mm (1.9 in)
6 September 1912
Oct
67.6 mm (2.7 in)
29 October 1945
Nov
51.1 mm (2.0 in)
22 November 1946
Dec
98.3 mm (3.9 in)
10 December 1937
Period of Record Coverage
1911 to 1954
Complete yearUnder 90 percent of days
43 years of record at Clearlake Park, 1911 to 1954. 11 years have data for under 90 percent of days and are left out of rankings: 1911, 1919, 1921, 1923, 1924, 1925, 1926, 1929 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 29 complete years at Clearlake Park, 1913 to 1953. Blue stripes are years cooler than the station's own mean of 14.3 C (57.7 F); red stripes are warmer. The coolest year was 1916, at 12.3 C (54.1 F), and the warmest was 1934, at 15.3 C (59.5 F). The strongest colour marks a difference of 2.0 C (3.6 F).
Annual mean temperature at Clearlake Park as warming stripes, 1913 to 1953
Year
Annual mean temperature
Difference from the station mean
1913
14.4 C
+0.12 C
1914
13.8 C
-0.49 C
1916
12.3 C
-1.99 C
1917
15.1 C
+0.81 C
1918
14.8 C
+0.49 C
1922
13.8 C
-0.52 C
1927
15.0 C
+0.68 C
1928
14.9 C
+0.66 C
1932
13.5 C
-0.83 C
1933
13.5 C
-0.82 C
1934
15.3 C
+0.98 C
1935
13.7 C
-0.57 C
1936
14.6 C
+0.31 C
1937
13.5 C
-0.75 C
1938
14.1 C
-0.20 C
1939
14.4 C
+0.11 C
1940
14.4 C
+0.08 C
1941
14.1 C
-0.16 C
1942
13.6 C
-0.71 C
1943
14.5 C
+0.25 C
1944
14.3 C
+0.01 C
1945
14.8 C
+0.50 C
1946
14.0 C
-0.31 C
1947
14.5 C
+0.23 C
1949
14.5 C
+0.25 C
1950
15.0 C
+0.71 C
1951
15.0 C
+0.67 C
1952
14.6 C
+0.28 C
1953
14.5 C
+0.21 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1911 to 1954
Yearly extremes at Clearlake Park: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
43.3 C (109.9 F)
1924
40.6 C (105.1 F)
43
Coldest night (TNn)
-13.9 C (7.0 F)
1932
-7.2 C (19.0 F)
43
Wettest day (Rx1day)
194.3 mm (7.6 in)
1926
48.3 mm (1.9 in)
43
Wettest five days (Rx5day)
291.1 mm (11.5 in)
1926
97.5 mm (3.8 in)
43
Longest dry spell (CDD)
164 days
1933
92 days
43
Hottest day (TXx)
The hottest day of the year at Clearlake Park, 1911 to 1954. The record is 43.3 C (109.9 F) in 1924, marked on the chart; the median year is 40.6 C (105.1 F).
Hottest day (TXx) at Clearlake Park by year
Year
Hottest day (TXx)
1911
40.0 C (104.0 F)
1912
37.8 C (100.0 F)
1913
41.1 C (106.0 F)
1914
40.0 C (104.0 F)
1915
41.1 C (106.0 F)
1916
40.6 C (105.1 F)
1917
42.2 C (108.0 F)
1918
42.2 C (108.0 F)
1919
38.9 C (102.0 F)
1921
37.8 C (100.0 F)
1922
42.2 C (108.0 F)
1923
41.1 C (106.0 F)
1924
43.3 C (109.9 F)
1925
41.1 C (106.0 F)
1926
34.4 C (93.9 F)
1927
38.9 C (102.0 F)
1928
38.9 C (102.0 F)
1929
41.7 C (107.1 F)
1930
37.8 C (100.0 F)
1931
32.8 C (91.0 F)
1932
40.0 C (104.0 F)
1933
41.7 C (107.1 F)
1934
40.6 C (105.1 F)
1935
41.1 C (106.0 F)
1936
41.7 C (107.1 F)
1937
41.7 C (107.1 F)
1938
42.2 C (108.0 F)
1939
42.2 C (108.0 F)
1940
40.6 C (105.1 F)
1941
40.6 C (105.1 F)
1942
41.7 C (107.1 F)
1943
39.4 C (102.9 F)
1944
41.1 C (106.0 F)
1945
41.7 C (107.1 F)
1946
40.6 C (105.1 F)
1947
39.4 C (102.9 F)
1948
38.3 C (100.9 F)
1949
39.4 C (102.9 F)
1950
41.7 C (107.1 F)
1951
39.4 C (102.9 F)
1952
40.0 C (104.0 F)
1953
39.4 C (102.9 F)
1954
38.9 C (102.0 F)
Coldest night (TNn)
The coldest night of the year at Clearlake Park, 1911 to 1954. The record is -13.9 C (7.0 F) in 1932, marked on the chart; the median year is -7.2 C (19.0 F).
Coldest night (TNn) at Clearlake Park by year
Year
Coldest night (TNn)
1911
-2.8 C (27.0 F)
1912
-4.4 C (24.1 F)
1913
-6.7 C (19.9 F)
1914
-7.8 C (18.0 F)
1915
-11.1 C (12.0 F)
1916
-11.1 C (12.0 F)
1917
-5.0 C (23.0 F)
1918
-6.7 C (19.9 F)
1919
-5.0 C (23.0 F)
1921
-2.8 C (27.0 F)
1922
-6.7 C (19.9 F)
1923
-0.6 C (30.9 F)
1924
-11.1 C (12.0 F)
1925
-6.1 C (21.0 F)
1926
-6.1 C (21.0 F)
1927
-5.6 C (21.9 F)
1928
-6.7 C (19.9 F)
1929
-7.8 C (18.0 F)
1930
-3.3 C (26.1 F)
1931
-8.3 C (17.1 F)
1932
-13.9 C (7.0 F)
1933
-10.0 C (14.0 F)
1934
-5.0 C (23.0 F)
1935
-7.8 C (18.0 F)
1936
-9.4 C (15.1 F)
1937
-11.7 C (10.9 F)
1938
-8.9 C (16.0 F)
1939
-7.8 C (18.0 F)
1940
-7.8 C (18.0 F)
1941
-7.8 C (18.0 F)
1942
-7.8 C (18.0 F)
1943
-8.9 C (16.0 F)
1944
-4.4 C (24.1 F)
1945
-7.2 C (19.0 F)
1946
-6.1 C (21.0 F)
1947
-7.8 C (18.0 F)
1948
-8.9 C (16.0 F)
1949
-8.3 C (17.1 F)
1950
-8.9 C (16.0 F)
1951
-5.6 C (21.9 F)
1952
-6.1 C (21.0 F)
1953
-3.9 C (25.0 F)
1954
-3.3 C (26.1 F)
Wettest day (Rx1day)
The wettest day of the year at Clearlake Park, 1911 to 1954. The record is 194.3 mm (7.6 in) in 1926, marked on the chart; the median year is 48.3 mm (1.9 in).
Wettest day (Rx1day) at Clearlake Park by year
Year
Wettest day (Rx1day)
1911
12.2 mm (0.5 in)
1912
48.0 mm (1.9 in)
1913
53.3 mm (2.1 in)
1914
57.7 mm (2.3 in)
1915
81.3 mm (3.2 in)
1916
36.8 mm (1.4 in)
1917
45.2 mm (1.8 in)
1918
40.6 mm (1.6 in)
1919
30.5 mm (1.2 in)
1921
34.0 mm (1.3 in)
1922
49.5 mm (1.9 in)
1923
24.6 mm (1.0 in)
1924
26.7 mm (1.1 in)
1925
100.3 mm (3.9 in)
1926
194.3 mm (7.6 in)
1927
50.8 mm (2.0 in)
1928
39.6 mm (1.6 in)
1929
45.7 mm (1.8 in)
1930
41.9 mm (1.6 in)
1931
48.3 mm (1.9 in)
1932
44.5 mm (1.8 in)
1933
51.1 mm (2.0 in)
1934
36.6 mm (1.4 in)
1935
66.0 mm (2.6 in)
1936
38.1 mm (1.5 in)
1937
98.3 mm (3.9 in)
1938
47.5 mm (1.9 in)
1939
53.3 mm (2.1 in)
1940
70.6 mm (2.8 in)
1941
48.3 mm (1.9 in)
1942
44.5 mm (1.8 in)
1943
80.0 mm (3.1 in)
1944
34.8 mm (1.4 in)
1945
67.6 mm (2.7 in)
1946
51.1 mm (2.0 in)
1947
32.5 mm (1.3 in)
1948
54.6 mm (2.1 in)
1949
59.9 mm (2.4 in)
1950
69.3 mm (2.7 in)
1951
47.8 mm (1.9 in)
1952
78.0 mm (3.1 in)
1953
47.5 mm (1.9 in)
1954
52.3 mm (2.1 in)
Wettest five days (Rx5day)
The wettest five days of the year at Clearlake Park, 1911 to 1954. The record is 291.1 mm (11.5 in) in 1926, marked on the chart; the median year is 97.5 mm (3.8 in).
Wettest five days (Rx5day) at Clearlake Park by year
Year
Wettest five days (Rx5day)
1911
6.4 mm (0.25 in)
1912
68.3 mm (2.7 in)
1913
121.4 mm (4.8 in)
1914
166.9 mm (6.6 in)
1915
150.4 mm (5.9 in)
1916
82.8 mm (3.3 in)
1917
95.5 mm (3.8 in)
1918
60.1 mm (2.4 in)
1919
75.7 mm (3.0 in)
1921
97.5 mm (3.8 in)
1922
87.4 mm (3.4 in)
1923
54.0 mm (2.1 in)
1924
20.9 mm (0.8 in)
1925
144.0 mm (5.7 in)
1926
291.1 mm (11.5 in)
1927
126.5 mm (5.0 in)
1928
91.4 mm (3.6 in)
1929
132.9 mm (5.2 in)
1930
59.4 mm (2.3 in)
1931
119.7 mm (4.7 in)
1932
81.8 mm (3.2 in)
1933
81.6 mm (3.2 in)
1934
107.8 mm (4.2 in)
1935
109.2 mm (4.3 in)
1936
82.0 mm (3.2 in)
1937
174.5 mm (6.9 in)
1938
123.9 mm (4.9 in)
1939
77.4 mm (3.0 in)
1940
179.6 mm (7.1 in)
1941
132.4 mm (5.2 in)
1942
125.5 mm (4.9 in)
1943
169.2 mm (6.7 in)
1944
79.3 mm (3.1 in)
1945
112.1 mm (4.4 in)
1946
84.6 mm (3.3 in)
1947
72.2 mm (2.8 in)
1948
96.3 mm (3.8 in)
1949
120.8 mm (4.8 in)
1950
108.9 mm (4.3 in)
1951
95.9 mm (3.8 in)
1952
111.2 mm (4.4 in)
1953
110.3 mm (4.3 in)
1954
92.2 mm (3.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Clearlake Park, 1911 to 1954. The record is 164 days in 1933, marked on the chart; the median year is 92 days.
Longest dry spell (CDD) at Clearlake Park by year
Year
Longest dry spell (CDD)
1911
92 days
1912
69 days
1913
100 days
1914
113 days
1915
38 days
1916
46 days
1917
24 days
1918
21 days
1919
18 days
1921
25 days
1922
52 days
1923
15 days
1924
29 days
1925
39 days
1926
15 days
1927
89 days
1928
153 days
1929
99 days
1930
129 days
1931
15 days
1932
113 days
1933
164 days
1934
90 days
1935
118 days
1936
113 days
1937
69 days
1938
149 days
1939
132 days
1940
95 days
1941
67 days
1942
133 days
1943
161 days
1944
141 days
1945
134 days
1946
63 days
1947
121 days
1948
101 days
1949
131 days
1950
102 days
1951
151 days
1952
80 days
1953
83 days
1954
77 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
29 years with a frost
Across 29 years with a frost, the median last spring frost at Clearlake Park falls on 10 April and the median first autumn frost on 28 October, which leaves a median of 203 days between them.
Fitted over all years, the growing season changes by +9.7 days per decade at this station.
Frost dates and growing season at Clearlake Park
Measure
Median, all years
Earliest period
Recent period (1913 to 1953)
Recent against earliest
Fitted trend
Last spring frost
10 April
n/a
10 April
n/a
-7.0 days per decade
First autumn frost
28 October
n/a
28 October
n/a
+2.7 days per decade
Growing days
203 days
n/a
203 days
n/a
+9.7 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.
Download the Data
Data for Clearlake Park standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Clearlake Park 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.