Record envelope, standing records and threshold days for Covelo (USC00042081), California, United States, with 120 years of record.
Key Facts for Covelo
Covelo (USC00042081) is a weather station in California, United States at 39.82 latitude and -123.24 longitude, 431 m (1,413 ft) above sea level.
The station reports from 1894 to 2013, 120 years of record.
1,464 records set at Covelo still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Covelo set a daily record high maximum temperature of 25.0 C (77.0 F) on 24 December 2013.
About the Station
Location: California, United States, 39.82 latitude, -123.24 longitude.
Elevation: 431 m (1,413 ft).
Period of record: 1894 to 2013, 120 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 Covelo. 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 Covelo, 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)
-13.9 C (7.0 F)
n/a
n/a
Feb
27.8 C (82.0 F)
-12.2 C (10.0 F)
n/a
n/a
Mar
31.1 C (88.0 F)
-7.8 C (18.0 F)
n/a
n/a
Apr
34.4 C (93.9 F)
-5.6 C (21.9 F)
n/a
n/a
May
40.0 C (104.0 F)
-2.8 C (27.0 F)
n/a
n/a
Jun
42.2 C (108.0 F)
-0.6 C (30.9 F)
n/a
n/a
Jul
45.6 C (114.1 F)
2.8 C (37.0 F)
n/a
n/a
Aug
46.1 C (115.0 F)
2.8 C (37.0 F)
n/a
n/a
Sep
45.6 C (114.1 F)
-2.2 C (28.0 F)
n/a
n/a
Oct
40.0 C (104.0 F)
-8.3 C (17.1 F)
n/a
n/a
Nov
31.1 C (88.0 F)
-10.0 C (14.0 F)
n/a
n/a
Dec
30.0 C (86.0 F)
-22.8 C (-9.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Covelo still stand. 1943 holds the most, with 41.
Standing records at Covelo by the year they were set
Year set
Standing records
1935
7
1936
38
1937
20
1938
17
1939
9
1942
2
1943
41
1944
15
1945
23
1946
20
1947
22
1948
28
1949
27
1950
32
1951
36
1952
30
1953
32
1954
29
1955
38
1956
15
1957
13
1959
25
1960
26
1961
18
1962
22
1963
19
1964
28
1965
22
1966
21
1967
14
1968
29
1969
13
1970
17
1971
24
1972
34
1973
10
1974
8
1975
18
1976
12
1977
18
1978
27
1979
10
1980
12
1981
21
1982
17
1983
12
1984
21
1985
25
1986
15
1987
13
1988
27
1989
27
1990
21
1991
22
1992
23
1993
14
1994
5
1995
21
1996
16
1997
11
1998
12
1999
18
2000
12
2001
6
2002
17
2003
13
2004
14
2005
12
2006
15
2007
16
2008
26
2009
14
2010
15
2011
12
2012
7
2013
23
All-Time Record Progression
7 new records
7 all-time records were set at Covelo between 8 December 1972 and 27 February 2007. Each dot is a new record.
When Covelo set new all-time records
Date
Kind
Detail
1972-12-08
Record low minimum temperature
Record low minimum temperature -20.0 C (-4.0 F)
1972-12-09
Record low maximum temperature
Record low maximum temperature -3.9 C (25.0 F)
1972-12-09
Record low minimum temperature
Record low minimum temperature -22.8 C (-9.0 F)
1972-12-10
Record low maximum temperature
Record low maximum temperature -6.7 C (19.9 F)
1981-08-08
Record high maximum temperature
Record high maximum temperature 46.1 C (115.0 F)
2002-12-15
Record daily precipitation
Record daily precipitation 190.8 mm (7.5 in)
2007-02-27
Record daily snowfall
Record daily snowfall 45.7 cm (18.0 in)
Wettest Day of Each Month
Dec: 190.8 mm (7.5 in)
The wettest day on record for each calendar month at Covelo. The most was 190.8 mm (7.5 in) on 15 December 2002.
Record daily precipitation for each month at Covelo
Month
Record daily precipitation (mm)
Date
Jan
123.4 mm (4.9 in)
14 January 1894
Feb
103.1 mm (4.1 in)
8 February 1960
Mar
100.6 mm (4.0 in)
12 March 2003
Apr
49.0 mm (1.9 in)
23 April 1983
May
53.1 mm (2.1 in)
18 May 2005
Jun
41.9 mm (1.6 in)
16 June 1937
Jul
20.3 mm (0.8 in)
8 July 1974
Aug
68.3 mm (2.7 in)
21 August 1968
Sep
61.2 mm (2.4 in)
27 September 1957
Oct
106.7 mm (4.2 in)
12 October 1962
Nov
96.3 mm (3.8 in)
16 November 1937
Dec
190.8 mm (7.5 in)
15 December 2002
Period of Record Coverage
1935 to 2013
Complete yearUnder 90 percent of days
76 years of record at Covelo, 1935 to 2013. 27 years have data for under 90 percent of days and are left out of rankings: 1935, 1939, 1942, 1943, 1944, 1946, 1957, 1969 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 49 complete years at Covelo, 1936 to 2010. Blue stripes are years cooler than the station's own mean of 13.2 C (55.8 F); red stripes are warmer. The coolest year was 1971, at 11.8 C (53.2 F), and the warmest was 1951, at 14.6 C (58.2 F). The strongest colour marks a difference of 1.5 C (2.7 F).
Annual mean temperature at Covelo as warming stripes, 1936 to 2010
Year
Annual mean temperature
Difference from the station mean
1936
14.3 C
+1.10 C
1937
13.3 C
+0.10 C
1938
13.4 C
+0.19 C
1945
13.6 C
+0.36 C
1947
13.4 C
+0.17 C
1948
12.0 C
-1.20 C
1950
13.4 C
+0.14 C
1951
14.6 C
+1.34 C
1952
13.6 C
+0.33 C
1954
13.2 C
-0.07 C
1955
12.8 C
-0.41 C
1956
13.1 C
-0.16 C
1959
13.1 C
-0.12 C
1960
13.2 C
-0.04 C
1961
12.9 C
-0.29 C
1962
12.9 C
-0.32 C
1963
12.1 C
-1.11 C
1965
12.5 C
-0.73 C
1966
12.8 C
-0.40 C
1967
12.6 C
-0.67 C
1968
12.5 C
-0.75 C
1971
11.8 C
-1.43 C
1972
12.3 C
-0.93 C
1975
12.0 C
-1.21 C
1978
13.7 C
+0.43 C
1979
13.5 C
+0.29 C
1981
14.1 C
+0.89 C
1983
12.9 C
-0.29 C
1984
13.4 C
+0.13 C
1989
13.5 C
+0.26 C
1990
13.4 C
+0.15 C
1991
13.9 C
+0.68 C
1992
14.5 C
+1.30 C
1993
13.1 C
-0.13 C
1994
13.3 C
+0.04 C
1995
14.2 C
+0.93 C
1996
14.3 C
+1.02 C
1997
13.7 C
+0.42 C
1998
12.8 C
-0.48 C
1999
12.7 C
-0.55 C
2000
13.3 C
+0.08 C
2001
13.5 C
+0.27 C
2002
13.4 C
+0.18 C
2004
13.7 C
+0.51 C
2005
13.3 C
+0.08 C
2007
13.2 C
-0.04 C
2008
13.7 C
+0.42 C
2009
13.0 C
-0.19 C
2010
12.7 C
-0.52 C
The fitted trend in annual mean temperature here over 1936 to 2010 is 0.03 C (-0.05 to 0.12) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.1 to 0.2) per decade. The slope is a straight line fitted to 49 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Covelo
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.03 C (-0.05 to 0.12) per decade
0.1 F (-0.1 to 0.2) per decade
1936 to 2010
49
Not clearly different from zero
Mean daily maximum
-0.04 C (-0.15 to 0.08) per decade
-0.1 F (-0.3 to 0.1) per decade
1936 to 2010
49
Not clearly different from zero
Mean daily minimum
0.10 C (0.00 to 0.20) per decade
0.18 F (0.00 to 0.36) per decade
1936 to 2010
49
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
1894 to 2013
Yearly extremes at Covelo: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
46.1 C (115.0 F)
1981
40.6 C (105.1 F)
76
Coldest night (TNn)
-22.8 C (-9.0 F)
1972
-8.3 C (17.1 F)
76
Wettest day (Rx1day)
190.8 mm (7.5 in)
2002
67.4 mm (2.7 in)
78
Wettest five days (Rx5day)
391.6 mm (15.4 in)
1964
168.0 mm (6.6 in)
78
Longest dry spell (CDD)
163 days
2002
82 days
78
Hottest day (TXx)
The hottest day of the year at Covelo, 1894 to 2013. The record is 46.1 C (115.0 F) in 1981, marked on the chart; the median year is 40.6 C (105.1 F).
Hottest day (TXx) at Covelo by year
Year
Hottest day (TXx)
1894
n/a
1935
38.9 C (102.0 F)
1936
40.6 C (105.1 F)
1937
41.7 C (107.1 F)
1938
43.9 C (111.0 F)
1939
32.2 C (90.0 F)
1940
n/a
1942
35.0 C (95.0 F)
1943
40.6 C (105.1 F)
1944
40.6 C (105.1 F)
1945
42.8 C (109.0 F)
1946
43.3 C (109.9 F)
1947
40.6 C (105.1 F)
1948
41.7 C (107.1 F)
1949
40.6 C (105.1 F)
1950
42.8 C (109.0 F)
1951
42.2 C (108.0 F)
1952
41.1 C (106.0 F)
1953
41.1 C (106.0 F)
1954
40.0 C (104.0 F)
1955
45.6 C (114.1 F)
1956
42.2 C (108.0 F)
1957
40.6 C (105.1 F)
1959
43.3 C (109.9 F)
1960
40.6 C (105.1 F)
1961
42.2 C (108.0 F)
1962
41.1 C (106.0 F)
1963
37.8 C (100.0 F)
1964
40.0 C (104.0 F)
1965
36.7 C (98.1 F)
1966
40.0 C (104.0 F)
1967
40.0 C (104.0 F)
1968
38.3 C (100.9 F)
1969
38.3 C (100.9 F)
1970
39.4 C (102.9 F)
1971
40.0 C (104.0 F)
1972
40.6 C (105.1 F)
1973
42.2 C (108.0 F)
1974
38.9 C (102.0 F)
1975
39.4 C (102.9 F)
1976
41.1 C (106.0 F)
1977
43.3 C (109.9 F)
1978
44.4 C (111.9 F)
1979
43.3 C (109.9 F)
1980
42.2 C (108.0 F)
1981
46.1 C (115.0 F)
1982
40.6 C (105.1 F)
1983
40.6 C (105.1 F)
1984
41.7 C (107.1 F)
1985
40.6 C (105.1 F)
1986
39.4 C (102.9 F)
1987
41.7 C (107.1 F)
1988
45.6 C (114.1 F)
1989
37.8 C (100.0 F)
1990
42.8 C (109.0 F)
1991
43.3 C (109.9 F)
1992
40.6 C (105.1 F)
1993
41.1 C (106.0 F)
1994
38.3 C (100.9 F)
1995
38.9 C (102.0 F)
1996
41.1 C (106.0 F)
1997
38.3 C (100.9 F)
1998
41.7 C (107.1 F)
1999
39.4 C (102.9 F)
2000
39.4 C (102.9 F)
2001
38.9 C (102.0 F)
2002
42.2 C (108.0 F)
2003
41.1 C (106.0 F)
2004
38.9 C (102.0 F)
2005
40.6 C (105.1 F)
2006
42.8 C (109.0 F)
2007
40.6 C (105.1 F)
2008
42.8 C (109.0 F)
2009
41.7 C (107.1 F)
2010
38.9 C (102.0 F)
2011
36.7 C (98.1 F)
2012
39.4 C (102.9 F)
2013
40.0 C (104.0 F)
Coldest night (TNn)
The coldest night of the year at Covelo, 1894 to 2013. The record is -22.8 C (-9.0 F) in 1972, marked on the chart; the median year is -8.3 C (17.1 F).
Coldest night (TNn) at Covelo by year
Year
Coldest night (TNn)
1894
n/a
1935
-6.1 C (21.0 F)
1936
-10.0 C (14.0 F)
1937
-12.8 C (9.0 F)
1938
-6.1 C (21.0 F)
1939
-5.6 C (21.9 F)
1940
n/a
1942
-5.0 C (23.0 F)
1943
-9.4 C (15.1 F)
1944
-5.0 C (23.0 F)
1945
-7.8 C (18.0 F)
1946
-6.7 C (19.9 F)
1947
-8.3 C (17.1 F)
1948
-11.1 C (12.0 F)
1949
-13.9 C (7.0 F)
1950
-13.9 C (7.0 F)
1951
-7.2 C (19.0 F)
1952
-7.8 C (18.0 F)
1953
-7.8 C (18.0 F)
1954
-10.0 C (14.0 F)
1955
-7.2 C (19.0 F)
1956
-7.8 C (18.0 F)
1957
-10.6 C (12.9 F)
1959
-11.1 C (12.0 F)
1960
-10.6 C (12.9 F)
1961
-11.1 C (12.0 F)
1962
-9.4 C (15.1 F)
1963
-13.3 C (8.1 F)
1964
-7.2 C (19.0 F)
1965
-9.4 C (15.1 F)
1966
-7.8 C (18.0 F)
1967
-9.4 C (15.1 F)
1968
-9.4 C (15.1 F)
1969
-6.7 C (19.9 F)
1970
-5.6 C (21.9 F)
1971
-8.3 C (17.1 F)
1972
-22.8 C (-9.0 F)
1973
-10.6 C (12.9 F)
1974
-8.3 C (17.1 F)
1975
-10.6 C (12.9 F)
1976
-8.3 C (17.1 F)
1977
-8.3 C (17.1 F)
1978
-11.1 C (12.0 F)
1979
-10.6 C (12.9 F)
1980
-8.9 C (16.0 F)
1981
-5.0 C (23.0 F)
1982
-8.3 C (17.1 F)
1983
-6.7 C (19.9 F)
1984
-8.3 C (17.1 F)
1985
-6.7 C (19.9 F)
1986
-5.6 C (21.9 F)
1987
-10.0 C (14.0 F)
1988
-7.8 C (18.0 F)
1989
-10.6 C (12.9 F)
1990
-12.8 C (9.0 F)
1991
-8.3 C (17.1 F)
1992
-6.7 C (19.9 F)
1993
-9.4 C (15.1 F)
1994
-7.2 C (19.0 F)
1995
-4.4 C (24.1 F)
1996
-5.0 C (23.0 F)
1997
-7.8 C (18.0 F)
1998
-11.1 C (12.0 F)
1999
-6.1 C (21.0 F)
2000
-7.2 C (19.0 F)
2001
-8.9 C (16.0 F)
2002
-6.1 C (21.0 F)
2003
-6.7 C (19.9 F)
2004
-7.8 C (18.0 F)
2005
-5.0 C (23.0 F)
2006
-6.7 C (19.9 F)
2007
-10.6 C (12.9 F)
2008
-9.4 C (15.1 F)
2009
-11.1 C (12.0 F)
2010
-6.1 C (21.0 F)
2011
-6.7 C (19.9 F)
2012
-10.6 C (12.9 F)
2013
-8.3 C (17.1 F)
Wettest day (Rx1day)
The wettest day of the year at Covelo, 1894 to 2013. The record is 190.8 mm (7.5 in) in 2002, marked on the chart; the median year is 67.4 mm (2.7 in).
Wettest day (Rx1day) at Covelo by year
Year
Wettest day (Rx1day)
1894
123.4 mm (4.9 in)
1935
31.0 mm (1.2 in)
1936
71.1 mm (2.8 in)
1937
160.5 mm (6.3 in)
1938
60.2 mm (2.4 in)
1939
28.7 mm (1.1 in)
1940
71.1 mm (2.8 in)
1942
37.1 mm (1.5 in)
1943
113.5 mm (4.5 in)
1944
48.8 mm (1.9 in)
1945
50.8 mm (2.0 in)
1946
65.5 mm (2.6 in)
1947
53.1 mm (2.1 in)
1948
53.3 mm (2.1 in)
1949
61.7 mm (2.4 in)
1950
94.5 mm (3.7 in)
1951
117.1 mm (4.6 in)
1952
61.2 mm (2.4 in)
1953
51.3 mm (2.0 in)
1954
86.1 mm (3.4 in)
1955
97.0 mm (3.8 in)
1956
81.3 mm (3.2 in)
1957
67.3 mm (2.6 in)
1959
42.7 mm (1.7 in)
1960
103.1 mm (4.1 in)
1961
47.0 mm (1.9 in)
1962
106.7 mm (4.2 in)
1963
72.9 mm (2.9 in)
1964
152.9 mm (6.0 in)
1965
65.3 mm (2.6 in)
1966
101.6 mm (4.0 in)
1967
78.0 mm (3.1 in)
1968
90.9 mm (3.6 in)
1969
79.8 mm (3.1 in)
1970
92.5 mm (3.6 in)
1971
87.4 mm (3.4 in)
1972
48.5 mm (1.9 in)
1973
62.7 mm (2.5 in)
1974
112.0 mm (4.4 in)
1975
90.2 mm (3.6 in)
1976
60.2 mm (2.4 in)
1977
80.5 mm (3.2 in)
1978
62.0 mm (2.4 in)
1979
73.7 mm (2.9 in)
1980
64.0 mm (2.5 in)
1981
76.7 mm (3.0 in)
1982
67.8 mm (2.7 in)
1983
60.2 mm (2.4 in)
1984
66.5 mm (2.6 in)
1985
69.6 mm (2.7 in)
1986
95.3 mm (3.8 in)
1987
62.2 mm (2.4 in)
1988
66.3 mm (2.6 in)
1989
48.3 mm (1.9 in)
1990
85.6 mm (3.4 in)
1991
52.8 mm (2.1 in)
1992
95.8 mm (3.8 in)
1993
102.6 mm (4.0 in)
1994
39.9 mm (1.6 in)
1995
144.8 mm (5.7 in)
1996
64.0 mm (2.5 in)
1997
98.0 mm (3.9 in)
1998
66.0 mm (2.6 in)
1999
50.0 mm (2.0 in)
2000
47.0 mm (1.9 in)
2001
62.2 mm (2.4 in)
2002
190.8 mm (7.5 in)
2003
100.6 mm (4.0 in)
2004
84.8 mm (3.3 in)
2005
77.5 mm (3.1 in)
2006
51.3 mm (2.0 in)
2007
47.5 mm (1.9 in)
2008
67.6 mm (2.7 in)
2009
33.5 mm (1.3 in)
2010
106.7 mm (4.2 in)
2011
46.2 mm (1.8 in)
2012
46.5 mm (1.8 in)
2013
40.1 mm (1.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Covelo, 1894 to 2013. The record is 391.6 mm (15.4 in) in 1964, marked on the chart; the median year is 168.0 mm (6.6 in).
Wettest five days (Rx5day) at Covelo by year
Year
Wettest five days (Rx5day)
1894
192.0 mm (7.6 in)
1935
69.5 mm (2.7 in)
1936
197.0 mm (7.8 in)
1937
302.8 mm (11.9 in)
1938
187.8 mm (7.4 in)
1939
75.4 mm (3.0 in)
1940
201.0 mm (7.9 in)
1942
103.0 mm (4.1 in)
1943
223.0 mm (8.8 in)
1944
109.0 mm (4.3 in)
1945
137.8 mm (5.4 in)
1946
178.8 mm (7.0 in)
1947
98.6 mm (3.9 in)
1948
98.6 mm (3.9 in)
1949
105.4 mm (4.1 in)
1950
218.2 mm (8.6 in)
1951
192.3 mm (7.6 in)
1952
198.4 mm (7.8 in)
1953
110.0 mm (4.3 in)
1954
177.0 mm (7.0 in)
1955
260.9 mm (10.3 in)
1956
210.9 mm (8.3 in)
1957
161.1 mm (6.3 in)
1959
114.6 mm (4.5 in)
1960
257.4 mm (10.1 in)
1961
115.3 mm (4.5 in)
1962
206.6 mm (8.1 in)
1963
168.7 mm (6.6 in)
1964
391.6 mm (15.4 in)
1965
173.5 mm (6.8 in)
1966
264.2 mm (10.4 in)
1967
144.6 mm (5.7 in)
1968
189.0 mm (7.4 in)
1969
150.4 mm (5.9 in)
1970
207.5 mm (8.2 in)
1971
180.9 mm (7.1 in)
1972
122.5 mm (4.8 in)
1973
145.7 mm (5.7 in)
1974
221.5 mm (8.7 in)
1975
206.8 mm (8.1 in)
1976
179.6 mm (7.1 in)
1977
164.0 mm (6.5 in)
1978
142.1 mm (5.6 in)
1979
144.8 mm (5.7 in)
1980
178.4 mm (7.0 in)
1981
191.3 mm (7.5 in)
1982
182.8 mm (7.2 in)
1983
167.2 mm (6.6 in)
1984
127.2 mm (5.0 in)
1985
118.7 mm (4.7 in)
1986
286.1 mm (11.3 in)
1987
120.4 mm (4.7 in)
1988
161.8 mm (6.4 in)
1989
96.1 mm (3.8 in)
1990
131.6 mm (5.2 in)
1991
167.1 mm (6.6 in)
1992
186.9 mm (7.4 in)
1993
199.7 mm (7.9 in)
1994
99.1 mm (3.9 in)
1995
242.8 mm (9.6 in)
1996
174.8 mm (6.9 in)
1997
240.9 mm (9.5 in)
1998
179.5 mm (7.1 in)
1999
141.7 mm (5.6 in)
2000
115.8 mm (4.6 in)
2001
142.0 mm (5.6 in)
2002
298.8 mm (11.8 in)
2003
113.4 mm (4.5 in)
2004
144.5 mm (5.7 in)
2005
239.5 mm (9.4 in)
2006
200.2 mm (7.9 in)
2007
120.4 mm (4.7 in)
2008
155.0 mm (6.1 in)
2009
90.2 mm (3.6 in)
2010
158.3 mm (6.2 in)
2011
113.5 mm (4.5 in)
2012
172.2 mm (6.8 in)
2013
50.8 mm (2.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Covelo, 1894 to 2013. The record is 163 days in 2002, marked on the chart; the median year is 82 days.
Longest dry spell (CDD) at Covelo by year
Year
Longest dry spell (CDD)
1894
6 days
1935
17 days
1936
90 days
1937
106 days
1938
121 days
1939
44 days
1940
26 days
1942
16 days
1943
43 days
1944
49 days
1945
130 days
1946
59 days
1947
120 days
1948
73 days
1949
70 days
1950
89 days
1951
83 days
1952
110 days
1953
79 days
1954
71 days
1955
60 days
1956
113 days
1957
57 days
1959
113 days
1960
132 days
1961
58 days
1962
71 days
1963
104 days
1964
89 days
1965
54 days
1966
139 days
1967
105 days
1968
75 days
1969
91 days
1970
130 days
1971
65 days
1972
67 days
1973
111 days
1974
30 days
1975
72 days
1976
57 days
1977
75 days
1978
102 days
1979
62 days
1980
104 days
1981
121 days
1982
59 days
1983
42 days
1984
104 days
1985
80 days
1986
106 days
1987
122 days
1988
109 days
1989
77 days
1990
109 days
1991
60 days
1992
92 days
1993
74 days
1994
143 days
1995
113 days
1996
79 days
1997
50 days
1998
123 days
1999
81 days
2000
55 days
2001
88 days
2002
163 days
2003
83 days
2004
140 days
2005
118 days
2006
125 days
2007
62 days
2008
89 days
2009
66 days
2010
98 days
2011
53 days
2012
113 days
2013
29 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
49 years with a frost
Across 49 years with a frost, the median last spring frost at Covelo falls on 5 May and the median first autumn frost on 16 October, which leaves a median of 165 days between them.
Fitted over all years, the growing season changes by +2.6 days per decade at this station.
Frost dates and growing season at Covelo
Measure
Median, all years
Earliest period
Recent period (1967 to 2010)
Recent against earliest
Fitted trend
Last spring frost
5 May
n/a
1 May
n/a
-2.1 days per decade
First autumn frost
16 October
n/a
17 October
n/a
+0.5 days per decade
Growing days
165 days
n/a
173 days
n/a
+2.6 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
64 years, 1937 to 2010
A day with at least 72.3 mm (2.8 in) of rain is expected about once in 2 years. A day with at least 183.0 mm (7.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Covelo: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
72.3 mm (2.8 in)
5 years
98.0 mm (3.9 in)
10 years
116.5 mm (4.6 in)
25 years
141.7 mm (5.6 in)
50 years
161.8 mm (6.4 in)
100 years
183.0 mm (7.2 in)
Longer than the 64 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, 64 years of values from 1937 to 2010.
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: 190.8 mm (7.5 in) in 2002; 160.5 mm (6.3 in) in 1937; 152.9 mm (6.0 in) in 1964.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Covelo standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Covelo 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 2026-10-16 (16 October 2026). Records are computed by this site and are not official.