Record envelope, standing records and threshold days for Lakeport (USC00044701), California, United States, with 82 years of record.
Key Facts for Lakeport
Lakeport (USC00044701) is a weather station in California, United States at 39.03 latitude and -122.92 longitude, 401 m (1,315 ft) above sea level.
The station reports from 1920 to 2001, 82 years of record.
1,464 records set at Lakeport still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Lakeport set a daily record precipitation of 4.6 mm (0.18 in) on 27 June 2001.
About the Station
Location: California, United States, 39.03 latitude, -122.92 longitude.
Elevation: 401 m (1,315 ft).
Period of record: 1920 to 2001, 82 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
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 Lakeport. 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 Lakeport, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
26.1 C (79.0 F)
-11.1 C (12.0 F)
n/a
n/a
Feb
26.7 C (80.1 F)
-9.4 C (15.1 F)
n/a
n/a
Mar
30.6 C (87.1 F)
-6.1 C (21.0 F)
n/a
n/a
Apr
33.3 C (91.9 F)
-4.4 C (24.1 F)
n/a
n/a
May
37.2 C (99.0 F)
-1.7 C (28.9 F)
n/a
n/a
Jun
41.7 C (107.1 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
45.0 C (113.0 F)
-1.1 C (30.0 F)
n/a
n/a
Aug
44.4 C (111.9 F)
1.1 C (34.0 F)
n/a
n/a
Sep
42.2 C (108.0 F)
-2.2 C (28.0 F)
n/a
n/a
Oct
38.3 C (100.9 F)
-11.1 C (12.0 F)
n/a
n/a
Nov
32.8 C (91.0 F)
-7.8 C (18.0 F)
n/a
n/a
Dec
24.4 C (75.9 F)
-12.8 C (9.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Lakeport still stand. 1953 holds the most, with 58.
Standing records at Lakeport by the year they were set
Year set
Standing records
1940
6
1941
21
1942
36
1943
9
1944
22
1945
43
1946
28
1947
28
1948
51
1949
42
1950
54
1951
26
1952
42
1953
58
1954
22
1955
19
1956
12
1957
18
1958
17
1959
20
1960
23
1961
17
1962
21
1963
22
1964
21
1965
13
1966
28
1967
38
1968
17
1969
13
1970
24
1971
24
1972
40
1973
29
1974
32
1975
26
1976
19
1977
32
1978
24
1979
10
1980
24
1981
18
1982
33
1983
17
1984
25
1985
27
1986
19
1987
22
1988
14
1989
19
1990
16
1991
25
1992
19
1993
11
1994
9
1995
22
1996
18
1997
10
1998
20
1999
13
2000
27
2001
9
All-Time Record Progression
6 new records
6 all-time records were set at Lakeport between 10 August 1971 and 2 January 1997. Each dot is a new record.
When Lakeport set new all-time records
Date
Kind
Detail
1971-08-10
Record high maximum temperature
Record high maximum temperature 44.4 C (111.9 F)
1972-12-08
Record low minimum temperature
Record low minimum temperature -11.1 C (12.0 F)
1972-12-09
Record low maximum temperature
Record low maximum temperature 1.1 C (34.0 F)
1972-12-09
Record low minimum temperature
Record low minimum temperature -12.8 C (9.0 F)
1984-07-05
Record high maximum temperature
Record high maximum temperature 45.0 C (113.0 F)
1997-01-02
Record daily precipitation
Record daily precipitation 161.3 mm (6.4 in)
Wettest Day of Each Month
Jan: 161.3 mm (6.4 in)
The wettest day on record for each calendar month at Lakeport. The most was 161.3 mm (6.4 in) on 2 January 1997.
Record daily precipitation for each month at Lakeport
Month
Record daily precipitation (mm)
Date
Jan
161.3 mm (6.4 in)
2 January 1997
Feb
100.8 mm (4.0 in)
17 February 1986
Mar
115.8 mm (4.6 in)
9 March 1995
Apr
52.6 mm (2.1 in)
5 April 1926
May
48.0 mm (1.9 in)
4 May 1951
Jun
46.2 mm (1.8 in)
2 June 1967
Jul
16.3 mm (0.6 in)
8 July 1974
Aug
23.1 mm (0.9 in)
20 August 1968
Sep
46.7 mm (1.8 in)
27 September 1957
Oct
117.3 mm (4.6 in)
12 October 1962
Nov
84.3 mm (3.3 in)
18 November 1920
Dec
137.9 mm (5.4 in)
10 December 1937
Period of Record Coverage
1940 to 2001
Complete yearUnder 90 percent of days
62 years of record at Lakeport, 1940 to 2001. 22 years have data for under 90 percent of days and are left out of rankings: 1940, 1943, 1956, 1983, 1984, 1985, 1986, 1987 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 31 complete years at Lakeport, 1941 to 1981. Blue stripes are years cooler than the station's own mean of 14.0 C (57.2 F); red stripes are warmer. The coolest year was 1948, at 13.0 C (55.3 F), and the warmest was 1981, at 15.1 C (59.1 F). The strongest colour marks a difference of 1.1 C (2.0 F).
Annual mean temperature at Lakeport as warming stripes, 1941 to 1981
Year
Annual mean temperature
Difference from the station mean
1941
14.3 C
+0.33 C
1945
14.6 C
+0.54 C
1947
14.2 C
+0.16 C
1948
13.0 C
-1.05 C
1950
13.5 C
-0.52 C
1951
13.3 C
-0.69 C
1952
13.2 C
-0.77 C
1955
13.2 C
-0.77 C
1958
14.3 C
+0.26 C
1960
14.5 C
+0.49 C
1961
14.1 C
+0.10 C
1962
14.0 C
+0.00 C
1963
13.9 C
-0.16 C
1964
13.9 C
-0.08 C
1965
13.9 C
-0.07 C
1966
14.3 C
+0.29 C
1967
13.9 C
-0.10 C
1968
14.2 C
+0.20 C
1969
14.3 C
+0.25 C
1970
14.6 C
+0.60 C
1971
13.5 C
-0.48 C
1972
13.8 C
-0.20 C
1973
13.9 C
-0.08 C
1974
13.5 C
-0.50 C
1975
13.5 C
-0.52 C
1976
14.2 C
+0.14 C
1977
14.5 C
+0.53 C
1978
14.3 C
+0.30 C
1979
14.3 C
+0.29 C
1980
14.3 C
+0.33 C
1981
15.1 C
+1.07 C
The fitted trend in annual mean temperature here over 1941 to 1981 is 0.14 C (-0.01 to 0.29) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.26 F (-0.02 to 0.53) per decade. The slope is a straight line fitted to 31 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Lakeport
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.14 C (-0.01 to 0.29) per decade
0.26 F (-0.02 to 0.53) per decade
1941 to 1981
31
Not clearly different from zero
Mean daily maximum
0.3 C (0.1 to 0.5) per decade
0.6 F (0.2 to 0.9) per decade
1941 to 1981
31
Rise
Mean daily minimum
-0.04 C (-0.23 to 0.15) per decade
-0.1 F (-0.4 to 0.3) per decade
1941 to 1981
31
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
1920 to 2001
Yearly extremes at Lakeport: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.0 C (113.0 F)
1984
40.6 C (105.1 F)
62
Coldest night (TNn)
-12.8 C (9.0 F)
1972
-6.7 C (19.9 F)
62
Wettest day (Rx1day)
161.3 mm (6.4 in)
1997
58.7 mm (2.3 in)
82
Wettest five days (Rx5day)
289.0 mm (11.4 in)
1986
116.7 mm (4.6 in)
82
Longest dry spell (CDD)
156 days
1932
85 days
82
Hottest day (TXx)
The hottest day of the year at Lakeport, 1920 to 2001. The record is 45.0 C (113.0 F) in 1984, marked on the chart; the median year is 40.6 C (105.1 F).
Hottest day (TXx) at Lakeport by year
Year
Hottest day (TXx)
1920
n/a
1921
n/a
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1934
n/a
1935
n/a
1936
n/a
1937
n/a
1938
n/a
1939
n/a
1940
25.6 C (78.1 F)
1941
41.1 C (106.0 F)
1942
43.3 C (109.9 F)
1943
40.6 C (105.1 F)
1944
41.7 C (107.1 F)
1945
39.4 C (102.9 F)
1946
39.4 C (102.9 F)
1947
38.3 C (100.9 F)
1948
40.6 C (105.1 F)
1949
38.3 C (100.9 F)
1950
41.7 C (107.1 F)
1951
38.3 C (100.9 F)
1952
40.0 C (104.0 F)
1953
38.9 C (102.0 F)
1954
38.9 C (102.0 F)
1955
41.7 C (107.1 F)
1956
37.8 C (100.0 F)
1957
39.4 C (102.9 F)
1958
39.4 C (102.9 F)
1959
41.1 C (106.0 F)
1960
41.1 C (106.0 F)
1961
41.1 C (106.0 F)
1962
37.8 C (100.0 F)
1963
39.4 C (102.9 F)
1964
43.3 C (109.9 F)
1965
40.6 C (105.1 F)
1966
42.2 C (108.0 F)
1967
41.7 C (107.1 F)
1968
42.2 C (108.0 F)
1969
41.7 C (107.1 F)
1970
41.7 C (107.1 F)
1971
44.4 C (111.9 F)
1972
44.4 C (111.9 F)
1973
40.6 C (105.1 F)
1974
40.6 C (105.1 F)
1975
42.8 C (109.0 F)
1976
41.1 C (106.0 F)
1977
42.2 C (108.0 F)
1978
43.9 C (111.0 F)
1979
41.7 C (107.1 F)
1980
42.8 C (109.0 F)
1981
44.4 C (111.9 F)
1982
40.0 C (104.0 F)
1983
37.8 C (100.0 F)
1984
45.0 C (113.0 F)
1985
40.6 C (105.1 F)
1986
39.4 C (102.9 F)
1987
40.6 C (105.1 F)
1988
40.0 C (104.0 F)
1989
37.8 C (100.0 F)
1990
42.8 C (109.0 F)
1991
41.1 C (106.0 F)
1992
40.0 C (104.0 F)
1993
40.0 C (104.0 F)
1994
38.3 C (100.9 F)
1995
38.9 C (102.0 F)
1996
40.6 C (105.1 F)
1997
41.1 C (106.0 F)
1998
42.2 C (108.0 F)
1999
41.7 C (107.1 F)
2000
40.0 C (104.0 F)
2001
38.3 C (100.9 F)
Coldest night (TNn)
The coldest night of the year at Lakeport, 1920 to 2001. The record is -12.8 C (9.0 F) in 1972, marked on the chart; the median year is -6.7 C (19.9 F).
Coldest night (TNn) at Lakeport by year
Year
Coldest night (TNn)
1920
n/a
1921
n/a
1922
n/a
1923
n/a
1924
n/a
1925
n/a
1926
n/a
1927
n/a
1928
n/a
1929
n/a
1930
n/a
1931
n/a
1932
n/a
1933
n/a
1934
n/a
1935
n/a
1936
n/a
1937
n/a
1938
n/a
1939
n/a
1940
-7.2 C (19.0 F)
1941
-5.0 C (23.0 F)
1942
-6.7 C (19.9 F)
1943
-4.4 C (24.1 F)
1944
-8.9 C (16.0 F)
1945
-6.1 C (21.0 F)
1946
-6.7 C (19.9 F)
1947
-6.7 C (19.9 F)
1948
-8.9 C (16.0 F)
1949
-10.0 C (14.0 F)
1950
-9.4 C (15.1 F)
1951
-5.6 C (21.9 F)
1952
-5.6 C (21.9 F)
1953
-6.7 C (19.9 F)
1954
-6.7 C (19.9 F)
1955
-5.6 C (21.9 F)
1956
-6.7 C (19.9 F)
1957
-7.2 C (19.0 F)
1958
-5.0 C (23.0 F)
1959
-5.0 C (23.0 F)
1960
-7.8 C (18.0 F)
1961
-6.7 C (19.9 F)
1962
-7.8 C (18.0 F)
1963
-8.3 C (17.1 F)
1964
-5.0 C (23.0 F)
1965
-7.2 C (19.0 F)
1966
-6.1 C (21.0 F)
1967
-6.7 C (19.9 F)
1968
-7.8 C (18.0 F)
1969
-6.1 C (21.0 F)
1970
-6.1 C (21.0 F)
1971
-6.1 C (21.0 F)
1972
-12.8 C (9.0 F)
1973
-8.3 C (17.1 F)
1974
-8.9 C (16.0 F)
1975
-11.1 C (12.0 F)
1976
-6.7 C (19.9 F)
1977
-6.1 C (21.0 F)
1978
-7.2 C (19.0 F)
1979
-7.8 C (18.0 F)
1980
-7.2 C (19.0 F)
1981
-3.3 C (26.1 F)
1982
-11.1 C (12.0 F)
1983
-2.2 C (28.0 F)
1984
-3.9 C (25.0 F)
1985
-5.0 C (23.0 F)
1986
-3.3 C (26.1 F)
1987
-7.8 C (18.0 F)
1988
-5.6 C (21.9 F)
1989
-9.4 C (15.1 F)
1990
-11.7 C (10.9 F)
1991
-7.8 C (18.0 F)
1992
-4.4 C (24.1 F)
1993
-5.6 C (21.9 F)
1994
-5.0 C (23.0 F)
1995
-3.9 C (25.0 F)
1996
-5.0 C (23.0 F)
1997
-6.7 C (19.9 F)
1998
-8.3 C (17.1 F)
1999
-3.9 C (25.0 F)
2000
-4.4 C (24.1 F)
2001
-5.6 C (21.9 F)
Wettest day (Rx1day)
The wettest day of the year at Lakeport, 1920 to 2001. The record is 161.3 mm (6.4 in) in 1997, marked on the chart; the median year is 58.7 mm (2.3 in).
Wettest day (Rx1day) at Lakeport by year
Year
Wettest day (Rx1day)
1920
84.3 mm (3.3 in)
1921
44.5 mm (1.8 in)
1922
65.3 mm (2.6 in)
1923
46.0 mm (1.8 in)
1924
52.3 mm (2.1 in)
1925
65.0 mm (2.6 in)
1926
81.8 mm (3.2 in)
1927
36.8 mm (1.4 in)
1928
53.3 mm (2.1 in)
1929
48.3 mm (1.9 in)
1930
30.5 mm (1.2 in)
1931
69.9 mm (2.8 in)
1932
43.9 mm (1.7 in)
1933
36.3 mm (1.4 in)
1934
37.3 mm (1.5 in)
1935
45.5 mm (1.8 in)
1936
47.8 mm (1.9 in)
1937
137.9 mm (5.4 in)
1938
40.4 mm (1.6 in)
1939
33.0 mm (1.3 in)
1940
81.8 mm (3.2 in)
1941
50.8 mm (2.0 in)
1942
69.9 mm (2.8 in)
1943
95.8 mm (3.8 in)
1944
58.9 mm (2.3 in)
1945
53.6 mm (2.1 in)
1946
47.0 mm (1.9 in)
1947
44.5 mm (1.8 in)
1948
41.7 mm (1.6 in)
1949
38.1 mm (1.5 in)
1950
96.5 mm (3.8 in)
1951
64.3 mm (2.5 in)
1952
80.8 mm (3.2 in)
1953
55.9 mm (2.2 in)
1954
74.2 mm (2.9 in)
1955
96.5 mm (3.8 in)
1956
55.9 mm (2.2 in)
1957
60.2 mm (2.4 in)
1958
69.3 mm (2.7 in)
1959
44.5 mm (1.8 in)
1960
94.7 mm (3.7 in)
1961
63.0 mm (2.5 in)
1962
117.3 mm (4.6 in)
1963
68.8 mm (2.7 in)
1964
110.7 mm (4.4 in)
1965
60.2 mm (2.4 in)
1966
63.0 mm (2.5 in)
1967
75.2 mm (3.0 in)
1968
80.0 mm (3.1 in)
1969
56.6 mm (2.2 in)
1970
57.7 mm (2.3 in)
1971
71.4 mm (2.8 in)
1972
34.0 mm (1.3 in)
1973
58.4 mm (2.3 in)
1974
72.4 mm (2.9 in)
1975
49.3 mm (1.9 in)
1976
23.4 mm (0.9 in)
1977
72.4 mm (2.9 in)
1978
60.5 mm (2.4 in)
1979
80.8 mm (3.2 in)
1980
76.2 mm (3.0 in)
1981
54.6 mm (2.1 in)
1982
69.9 mm (2.8 in)
1983
67.3 mm (2.6 in)
1984
38.6 mm (1.5 in)
1985
49.5 mm (1.9 in)
1986
100.8 mm (4.0 in)
1987
32.0 mm (1.3 in)
1988
24.1 mm (0.9 in)
1989
22.1 mm (0.9 in)
1990
42.7 mm (1.7 in)
1991
31.5 mm (1.2 in)
1992
75.4 mm (3.0 in)
1993
51.1 mm (2.0 in)
1994
30.7 mm (1.2 in)
1995
115.8 mm (4.6 in)
1996
55.4 mm (2.2 in)
1997
161.3 mm (6.4 in)
1998
79.2 mm (3.1 in)
1999
57.2 mm (2.3 in)
2000
84.8 mm (3.3 in)
2001
63.8 mm (2.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Lakeport, 1920 to 2001. The record is 289.0 mm (11.4 in) in 1986, marked on the chart; the median year is 116.7 mm (4.6 in).
Wettest five days (Rx5day) at Lakeport by year
Year
Wettest five days (Rx5day)
1920
126.5 mm (5.0 in)
1921
107.1 mm (4.2 in)
1922
138.3 mm (5.4 in)
1923
82.4 mm (3.2 in)
1924
101.3 mm (4.0 in)
1925
101.9 mm (4.0 in)
1926
142.2 mm (5.6 in)
1927
128.3 mm (5.1 in)
1928
136.7 mm (5.4 in)
1929
167.9 mm (6.6 in)
1930
71.6 mm (2.8 in)
1931
150.5 mm (5.9 in)
1932
91.1 mm (3.6 in)
1933
94.4 mm (3.7 in)
1934
106.4 mm (4.2 in)
1935
96.1 mm (3.8 in)
1936
117.6 mm (4.6 in)
1937
213.6 mm (8.4 in)
1938
110.0 mm (4.3 in)
1939
59.0 mm (2.3 in)
1940
188.4 mm (7.4 in)
1941
115.8 mm (4.6 in)
1942
153.6 mm (6.0 in)
1943
201.3 mm (7.9 in)
1944
96.8 mm (3.8 in)
1945
129.5 mm (5.1 in)
1946
98.8 mm (3.9 in)
1947
68.9 mm (2.7 in)
1948
74.2 mm (2.9 in)
1949
86.7 mm (3.4 in)
1950
147.3 mm (5.8 in)
1951
133.9 mm (5.3 in)
1952
149.8 mm (5.9 in)
1953
86.3 mm (3.4 in)
1954
127.6 mm (5.0 in)
1955
218.4 mm (8.6 in)
1956
105.4 mm (4.1 in)
1957
151.2 mm (6.0 in)
1958
105.3 mm (4.1 in)
1959
108.3 mm (4.3 in)
1960
112.0 mm (4.4 in)
1961
97.3 mm (3.8 in)
1962
195.6 mm (7.7 in)
1963
169.1 mm (6.7 in)
1964
250.9 mm (9.9 in)
1965
155.9 mm (6.1 in)
1966
106.0 mm (4.2 in)
1967
165.4 mm (6.5 in)
1968
120.7 mm (4.8 in)
1969
128.3 mm (5.1 in)
1970
158.6 mm (6.2 in)
1971
128.3 mm (5.1 in)
1972
88.4 mm (3.5 in)
1973
162.6 mm (6.4 in)
1974
132.1 mm (5.2 in)
1975
103.1 mm (4.1 in)
1976
63.2 mm (2.5 in)
1977
102.8 mm (4.0 in)
1978
180.1 mm (7.1 in)
1979
139.7 mm (5.5 in)
1980
175.8 mm (6.9 in)
1981
136.9 mm (5.4 in)
1982
156.5 mm (6.2 in)
1983
183.9 mm (7.2 in)
1984
102.9 mm (4.1 in)
1985
62.0 mm (2.4 in)
1986
289.0 mm (11.4 in)
1987
65.7 mm (2.6 in)
1988
36.5 mm (1.4 in)
1989
27.3 mm (1.1 in)
1990
42.7 mm (1.7 in)
1991
37.8 mm (1.5 in)
1992
122.9 mm (4.8 in)
1993
88.4 mm (3.5 in)
1994
40.9 mm (1.6 in)
1995
145.8 mm (5.7 in)
1996
66.8 mm (2.6 in)
1997
162.1 mm (6.4 in)
1998
191.7 mm (7.5 in)
1999
97.8 mm (3.9 in)
2000
106.4 mm (4.2 in)
2001
65.2 mm (2.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Lakeport, 1920 to 2001. The record is 156 days in 1932, marked on the chart; the median year is 85 days.
Longest dry spell (CDD) at Lakeport by year
Year
Longest dry spell (CDD)
1920
71 days
1921
26 days
1922
31 days
1923
46 days
1924
38 days
1925
36 days
1926
31 days
1927
139 days
1928
24 days
1929
76 days
1930
64 days
1931
38 days
1932
156 days
1933
130 days
1934
54 days
1935
118 days
1936
113 days
1937
68 days
1938
117 days
1939
70 days
1940
37 days
1941
67 days
1942
104 days
1943
129 days
1944
117 days
1945
130 days
1946
54 days
1947
121 days
1948
102 days
1949
73 days
1950
88 days
1951
140 days
1952
110 days
1953
84 days
1954
77 days
1955
93 days
1956
60 days
1957
57 days
1958
86 days
1959
145 days
1960
132 days
1961
119 days
1962
74 days
1963
146 days
1964
90 days
1965
94 days
1966
84 days
1967
118 days
1968
85 days
1969
111 days
1970
130 days
1971
93 days
1972
126 days
1973
85 days
1974
59 days
1975
75 days
1976
65 days
1977
55 days
1978
68 days
1979
74 days
1980
72 days
1981
80 days
1982
78 days
1983
117 days
1984
55 days
1985
61 days
1986
106 days
1987
152 days
1988
33 days
1989
77 days
1990
113 days
1991
115 days
1992
92 days
1993
123 days
1994
98 days
1995
126 days
1996
66 days
1997
76 days
1998
144 days
1999
150 days
2000
84 days
2001
67 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 Lakeport falls on 24 April and the median first autumn frost on 29 October, which leaves a median of 190 days between them.
Fitted over all years, the growing season changes by +4.1 days per decade at this station.
Frost dates and growing season at Lakeport
Measure
Median, all years
Earliest period
Recent period (1945 to 1981)
Recent against earliest
Fitted trend
Last spring frost
24 April
n/a
24 April
n/a
-0.5 days per decade
First autumn frost
29 October
n/a
30 October
n/a
+3.5 days per decade
Growing days
190 days
n/a
189 days
n/a
+4.1 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
54 years, 1920 to 1991
A day with at least 60.0 mm (2.4 in) of rain is expected about once in 2 years. A day with at least 133.9 mm (5.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Lakeport: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
60.0 mm (2.4 in)
5 years
80.9 mm (3.2 in)
10 years
94.3 mm (3.7 in)
25 years
110.7 mm (4.4 in)
50 years
122.5 mm (4.8 in)
100 years
133.9 mm (5.3 in)
Longer than the 54 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, 54 years of values from 1920 to 1991.
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: 137.9 mm (5.4 in) in 1937; 117.3 mm (4.6 in) in 1962; 110.7 mm (4.4 in) in 1964.
Download the Data
Data for Lakeport standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Lakeport 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.