Record envelope, standing records and threshold days for Colusa 2 SSW (USC00041948), California, United States, with 79 years of record.
Key Facts for Colusa 2 SSW
Colusa 2 SSW (USC00041948) is a weather station in California, United States at 39.19 latitude and -122.03 longitude, 15 m (50 ft) above sea level.
The station reports from 1948 to 2026, 79 years of record.
1,464 records set at Colusa 2 SSW still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Colusa 2 SSW set a daily record precipitation of 43.2 mm (1.7 in) on 21 April 2026.
About the Station
Location: California, United States, 39.19 latitude, -122.03 longitude.
Elevation: 15 m (50 ft).
Period of record: 1948 to 2026, 79 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
19 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 Colusa 2 SSW. The lines show the 2026 daily maximum and minimum. 19 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Colusa 2 SSW, 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)
-7.8 C (18.0 F)
n/a
n/a
Feb
27.2 C (81.0 F)
-6.7 C (19.9 F)
23.9 C (75.0 F)
n/a
Mar
33.3 C (91.9 F)
-3.9 C (25.0 F)
33.3 C (91.9 F)
n/a
Apr
36.7 C (98.1 F)
-4.4 C (24.1 F)
32.2 C (90.0 F)
n/a
May
41.1 C (106.0 F)
-0.6 C (30.9 F)
35.6 C (96.1 F)
n/a
Jun
44.4 C (111.9 F)
1.1 C (34.0 F)
39.4 C (102.9 F)
n/a
Jul
44.4 C (111.9 F)
1.7 C (35.1 F)
37.8 C (100.0 F)
n/a
Aug
45.0 C (113.0 F)
5.6 C (42.1 F)
40.0 C (104.0 F)
n/a
Sep
45.6 C (114.1 F)
1.1 C (34.0 F)
33.3 C (91.9 F)
n/a
Oct
40.6 C (105.1 F)
-6.7 C (19.9 F)
n/a
n/a
Nov
31.1 C (88.0 F)
-5.6 C (21.9 F)
n/a
n/a
Dec
24.4 C (75.9 F)
-10.0 C (14.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Colusa 2 SSW still stand. 2024 holds the most, with 51.
Standing records at Colusa 2 SSW by the year they were set
Year set
Standing records
1948
6
1949
33
1950
42
1951
18
1952
18
1953
18
1954
11
1955
36
1956
36
1957
22
1958
30
1959
20
1960
25
1961
23
1962
18
1963
23
1964
22
1965
13
1966
13
1967
24
1968
23
1969
8
1970
10
1971
19
1972
32
1973
18
1974
5
1975
12
1976
16
1977
18
1978
18
1979
11
1980
8
1981
9
1982
12
1983
27
1984
10
1985
16
1986
19
1987
20
1988
17
1989
17
1990
18
1991
34
1992
14
1993
10
1994
9
1995
22
1996
22
1997
12
1998
22
1999
22
2000
24
2001
18
2002
10
2003
16
2004
10
2005
12
2006
11
2007
19
2008
9
2009
17
2010
11
2011
14
2012
12
2013
2
2014
19
2015
13
2016
13
2017
20
2018
8
2019
11
2020
43
2021
16
2022
26
2023
48
2024
51
2025
15
2026
15
All-Time Record Progression
6 new records
6 all-time records were set at Colusa 2 SSW between 22 December 1990 and 15 December 2022. Each dot is a new record.
When Colusa 2 SSW set new all-time records
Date
Kind
Detail
1990-12-22
Record low maximum temperature
Record low maximum temperature -2.8 C (27.0 F)
1998-02-02
Record daily precipitation
Record daily precipitation 90.4 mm (3.6 in)
2017-06-19
Record high minimum temperature
Record high minimum temperature 26.7 C (80.1 F)
2017-06-22
Record high minimum temperature
Record high minimum temperature 27.8 C (82.0 F)
2022-09-07
Record high maximum temperature
Record high maximum temperature 45.6 C (114.1 F)
2022-12-15
Record low minimum temperature
Record low minimum temperature -10.0 C (14.0 F)
Wettest Day of Each Month
Feb: 90.4 mm (3.6 in)
The wettest day on record for each calendar month at Colusa 2 SSW. The most was 90.4 mm (3.6 in) on 2 February 1998.
Record daily precipitation for each month at Colusa 2 SSW
Month
Record daily precipitation (mm)
Date
Jan
77.0 mm (3.0 in)
9 January 1995
Feb
90.4 mm (3.6 in)
2 February 1998
Mar
71.1 mm (2.8 in)
8 March 1995
Apr
50.8 mm (2.0 in)
27 April 1953
May
35.1 mm (1.4 in)
15 May 1996
Jun
26.4 mm (1.0 in)
28 June 2011
Jul
24.4 mm (1.0 in)
8 July 1974
Aug
21.6 mm (0.9 in)
11 August 1965
Sep
55.1 mm (2.2 in)
17 September 1989
Oct
85.1 mm (3.4 in)
12 October 1962
Nov
78.0 mm (3.1 in)
28 November 1970
Dec
52.1 mm (2.1 in)
11 December 1995
Period of Record Coverage
1948 to 2026
Complete yearUnder 90 percent of days
79 years of record at Colusa 2 SSW, 1948 to 2026. 17 years have data for under 90 percent of days and are left out of rankings: 1948, 1951, 1953, 1974, 1982, 1983, 1984, 1985 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 57 complete years at Colusa 2 SSW, 1949 to 2022. 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 1965, at 15.5 C (59.8 F), and the warmest was 2017, at 17.6 C (63.6 F). The strongest colour marks a difference of 1.3 C (2.3 F).
Annual mean temperature at Colusa 2 SSW as warming stripes, 1949 to 2022
Year
Annual mean temperature
Difference from the station mean
1949
15.8 C
-0.55 C
1950
16.5 C
+0.20 C
1952
15.8 C
-0.52 C
1954
15.7 C
-0.63 C
1955
15.7 C
-0.66 C
1956
15.8 C
-0.56 C
1957
16.0 C
-0.32 C
1958
17.1 C
+0.76 C
1959
17.1 C
+0.73 C
1960
16.3 C
-0.01 C
1961
16.3 C
-0.06 C
1962
16.0 C
-0.37 C
1963
15.5 C
-0.80 C
1964
16.0 C
-0.37 C
1965
15.5 C
-0.88 C
1966
16.4 C
+0.10 C
1967
16.0 C
-0.30 C
1968
16.1 C
-0.24 C
1969
16.0 C
-0.29 C
1970
16.4 C
+0.10 C
1971
15.6 C
-0.73 C
1972
15.9 C
-0.48 C
1973
16.3 C
-0.06 C
1975
15.6 C
-0.78 C
1976
16.4 C
+0.05 C
1977
16.3 C
-0.01 C
1978
16.7 C
+0.41 C
1979
16.6 C
+0.27 C
1980
16.2 C
-0.09 C
1981
16.9 C
+0.55 C
1983
16.2 C
-0.18 C
1984
16.5 C
+0.16 C
1989
15.7 C
-0.67 C
1990
15.7 C
-0.60 C
1991
16.6 C
+0.29 C
1992
16.9 C
+0.60 C
1993
16.1 C
-0.24 C
1994
15.7 C
-0.66 C
1996
17.1 C
+0.75 C
1997
17.0 C
+0.67 C
1998
16.0 C
-0.32 C
1999
16.0 C
-0.35 C
2001
17.0 C
+0.63 C
2002
16.6 C
+0.30 C
2003
16.8 C
+0.44 C
2004
16.7 C
+0.33 C
2005
16.7 C
+0.39 C
2006
16.5 C
+0.14 C
2007
16.3 C
-0.07 C
2009
16.6 C
+0.24 C
2011
15.6 C
-0.71 C
2015
17.5 C
+1.21 C
2016
17.4 C
+1.05 C
2017
17.6 C
+1.25 C
2019
16.5 C
+0.21 C
2020
16.4 C
+0.11 C
2022
17.1 C
+0.76 C
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1949 to 2022. In Fahrenheit: 0.2 F (0.1 to 0.3) per decade. The slope is a straight line fitted to 57 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Colusa 2 SSW
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (0.1 to 0.2) per decade
0.2 F (0.1 to 0.3) per decade
1949 to 2022
57
Rise
Mean daily maximum
0.05 C (-0.04 to 0.14) per decade
0.1 F (-0.1 to 0.3) per decade
1949 to 2022
57
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.2 to 0.5) per decade
1949 to 2022
57
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
1948 to 2026
Yearly extremes at Colusa 2 SSW: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.6 C (114.1 F)
2022
41.1 C (106.0 F)
79
Coldest night (TNn)
-10.0 C (14.0 F)
2022
-4.4 C (24.1 F)
78
Wettest day (Rx1day)
90.4 mm (3.6 in)
1998
33.5 mm (1.3 in)
79
Wettest five days (Rx5day)
165.8 mm (6.5 in)
1995
66.3 mm (2.6 in)
79
Longest dry spell (CDD)
204 days
2004
108 days
79
Hottest day (TXx)
The hottest day of the year at Colusa 2 SSW, 1948 to 2026. The record is 45.6 C (114.1 F) in 2022, marked on the chart; the median year is 41.1 C (106.0 F).
Hottest day (TXx) at Colusa 2 SSW by year
Year
Hottest day (TXx)
1948
32.2 C (90.0 F)
1949
40.6 C (105.1 F)
1950
44.4 C (111.9 F)
1951
40.6 C (105.1 F)
1952
43.3 C (109.9 F)
1953
42.2 C (108.0 F)
1954
42.8 C (109.0 F)
1955
43.3 C (109.9 F)
1956
43.3 C (109.9 F)
1957
42.8 C (109.0 F)
1958
41.1 C (106.0 F)
1959
42.8 C (109.0 F)
1960
43.9 C (111.0 F)
1961
44.4 C (111.9 F)
1962
40.6 C (105.1 F)
1963
39.4 C (102.9 F)
1964
40.0 C (104.0 F)
1965
40.0 C (104.0 F)
1966
41.7 C (107.1 F)
1967
41.1 C (106.0 F)
1968
40.0 C (104.0 F)
1969
40.0 C (104.0 F)
1970
41.1 C (106.0 F)
1971
43.9 C (111.0 F)
1972
44.4 C (111.9 F)
1973
41.1 C (106.0 F)
1974
41.1 C (106.0 F)
1975
43.3 C (109.9 F)
1976
40.6 C (105.1 F)
1977
41.7 C (107.1 F)
1978
45.0 C (113.0 F)
1979
41.1 C (106.0 F)
1980
41.7 C (107.1 F)
1981
42.2 C (108.0 F)
1982
39.4 C (102.9 F)
1983
40.6 C (105.1 F)
1984
42.2 C (108.0 F)
1985
42.2 C (108.0 F)
1986
39.4 C (102.9 F)
1987
41.1 C (106.0 F)
1988
43.3 C (109.9 F)
1989
41.7 C (107.1 F)
1990
43.9 C (111.0 F)
1991
43.9 C (111.0 F)
1992
42.2 C (108.0 F)
1993
39.4 C (102.9 F)
1994
39.4 C (102.9 F)
1995
40.6 C (105.1 F)
1996
41.1 C (106.0 F)
1997
40.0 C (104.0 F)
1998
41.1 C (106.0 F)
1999
42.2 C (108.0 F)
2000
40.6 C (105.1 F)
2001
41.7 C (107.1 F)
2002
40.6 C (105.1 F)
2003
42.8 C (109.0 F)
2004
39.4 C (102.9 F)
2005
41.1 C (106.0 F)
2006
42.2 C (108.0 F)
2007
40.0 C (104.0 F)
2008
42.2 C (108.0 F)
2009
41.7 C (107.1 F)
2010
41.7 C (107.1 F)
2011
37.8 C (100.0 F)
2012
41.7 C (107.1 F)
2013
39.4 C (102.9 F)
2014
41.1 C (106.0 F)
2015
42.2 C (108.0 F)
2016
40.6 C (105.1 F)
2017
42.2 C (108.0 F)
2018
40.0 C (104.0 F)
2019
40.6 C (105.1 F)
2020
42.2 C (108.0 F)
2021
41.1 C (106.0 F)
2022
45.6 C (114.1 F)
2023
42.2 C (108.0 F)
2024
42.8 C (109.0 F)
2025
40.0 C (104.0 F)
2026
40.0 C (104.0 F)
Coldest night (TNn)
The coldest night of the year at Colusa 2 SSW, 1948 to 2026. The record is -10.0 C (14.0 F) in 2022, marked on the chart; the median year is -4.4 C (24.1 F).
Coldest night (TNn) at Colusa 2 SSW by year
Year
Coldest night (TNn)
1948
-5.6 C (21.9 F)
1949
-6.1 C (21.0 F)
1950
-6.7 C (19.9 F)
1951
-3.9 C (25.0 F)
1952
-3.9 C (25.0 F)
1953
-3.3 C (26.1 F)
1954
-3.3 C (26.1 F)
1955
-4.4 C (24.1 F)
1956
-8.3 C (17.1 F)
1957
-6.7 C (19.9 F)
1958
-4.4 C (24.1 F)
1959
-5.0 C (23.0 F)
1960
-6.7 C (19.9 F)
1961
-6.1 C (21.0 F)
1962
-5.6 C (21.9 F)
1963
-6.1 C (21.0 F)
1964
-4.4 C (24.1 F)
1965
-5.6 C (21.9 F)
1966
-3.9 C (25.0 F)
1967
-5.0 C (23.0 F)
1968
-5.6 C (21.9 F)
1969
-3.9 C (25.0 F)
1970
-4.4 C (24.1 F)
1971
-4.4 C (24.1 F)
1972
-9.4 C (15.1 F)
1973
-4.4 C (24.1 F)
1974
-3.9 C (25.0 F)
1975
-6.1 C (21.0 F)
1976
-6.1 C (21.0 F)
1977
-3.3 C (26.1 F)
1978
-5.6 C (21.9 F)
1979
-3.9 C (25.0 F)
1980
-3.3 C (26.1 F)
1981
0.0 C (32.0 F)
1982
-1.1 C (30.0 F)
1983
-2.8 C (27.0 F)
1984
-2.2 C (28.0 F)
1985
-4.4 C (24.1 F)
1986
-2.8 C (27.0 F)
1987
-5.0 C (23.0 F)
1988
-2.8 C (27.0 F)
1989
-6.1 C (21.0 F)
1990
-7.8 C (18.0 F)
1991
-6.1 C (21.0 F)
1992
-2.2 C (28.0 F)
1993
-3.3 C (26.1 F)
1994
-2.2 C (28.0 F)
1995
0.0 C (32.0 F)
1996
0.0 C (32.0 F)
1997
-3.9 C (25.0 F)
1998
-4.4 C (24.1 F)
1999
-1.7 C (28.9 F)
2000
-2.8 C (27.0 F)
2001
-1.1 C (30.0 F)
2002
-2.8 C (27.0 F)
2003
-0.6 C (30.9 F)
2004
-1.7 C (28.9 F)
2005
-1.7 C (28.9 F)
2006
-2.8 C (27.0 F)
2007
-5.6 C (21.9 F)
2008
-5.0 C (23.0 F)
2009
-7.8 C (18.0 F)
2010
-1.7 C (28.9 F)
2011
-5.0 C (23.0 F)
2012
-4.4 C (24.1 F)
2013
-4.4 C (24.1 F)
2014
-2.2 C (28.0 F)
2015
-5.0 C (23.0 F)
2016
-1.7 C (28.9 F)
2017
-1.1 C (30.0 F)
2018
-3.3 C (26.1 F)
2019
-2.8 C (27.0 F)
2020
-6.7 C (19.9 F)
2021
-6.7 C (19.9 F)
2022
-10.0 C (14.0 F)
2023
-8.3 C (17.1 F)
2024
-4.4 C (24.1 F)
2025
-7.8 C (18.0 F)
2026
n/a
Wettest day (Rx1day)
The wettest day of the year at Colusa 2 SSW, 1948 to 2026. The record is 90.4 mm (3.6 in) in 1998, marked on the chart; the median year is 33.5 mm (1.3 in).
Wettest day (Rx1day) at Colusa 2 SSW by year
Year
Wettest day (Rx1day)
1948
28.2 mm (1.1 in)
1949
35.6 mm (1.4 in)
1950
45.7 mm (1.8 in)
1951
42.2 mm (1.7 in)
1952
39.1 mm (1.5 in)
1953
50.8 mm (2.0 in)
1954
27.7 mm (1.1 in)
1955
43.9 mm (1.7 in)
1956
26.2 mm (1.0 in)
1957
25.9 mm (1.0 in)
1958
40.4 mm (1.6 in)
1959
43.7 mm (1.7 in)
1960
23.6 mm (0.9 in)
1961
37.6 mm (1.5 in)
1962
85.1 mm (3.4 in)
1963
42.9 mm (1.7 in)
1964
35.1 mm (1.4 in)
1965
31.2 mm (1.2 in)
1966
39.6 mm (1.6 in)
1967
40.1 mm (1.6 in)
1968
27.9 mm (1.1 in)
1969
27.2 mm (1.1 in)
1970
78.0 mm (3.1 in)
1971
21.1 mm (0.8 in)
1972
25.7 mm (1.0 in)
1973
31.8 mm (1.3 in)
1974
26.4 mm (1.0 in)
1975
30.5 mm (1.2 in)
1976
18.5 mm (0.7 in)
1977
27.9 mm (1.1 in)
1978
42.4 mm (1.7 in)
1979
34.3 mm (1.4 in)
1980
45.0 mm (1.8 in)
1981
32.0 mm (1.3 in)
1982
41.4 mm (1.6 in)
1983
47.2 mm (1.9 in)
1984
23.6 mm (0.9 in)
1985
33.0 mm (1.3 in)
1986
69.6 mm (2.7 in)
1987
32.5 mm (1.3 in)
1988
28.4 mm (1.1 in)
1989
55.1 mm (2.2 in)
1990
27.9 mm (1.1 in)
1991
30.2 mm (1.2 in)
1992
35.6 mm (1.4 in)
1993
33.0 mm (1.3 in)
1994
31.0 mm (1.2 in)
1995
77.0 mm (3.0 in)
1996
41.1 mm (1.6 in)
1997
45.5 mm (1.8 in)
1998
90.4 mm (3.6 in)
1999
16.8 mm (0.7 in)
2000
28.7 mm (1.1 in)
2001
48.8 mm (1.9 in)
2002
30.5 mm (1.2 in)
2003
33.5 mm (1.3 in)
2004
30.0 mm (1.2 in)
2005
49.8 mm (2.0 in)
2006
45.7 mm (1.8 in)
2007
20.3 mm (0.8 in)
2008
55.9 mm (2.2 in)
2009
24.6 mm (1.0 in)
2010
38.1 mm (1.5 in)
2011
26.4 mm (1.0 in)
2012
31.8 mm (1.3 in)
2013
22.1 mm (0.9 in)
2014
52.1 mm (2.1 in)
2015
29.0 mm (1.1 in)
2016
33.0 mm (1.3 in)
2017
63.5 mm (2.5 in)
2018
50.8 mm (2.0 in)
2019
58.7 mm (2.3 in)
2020
17.3 mm (0.7 in)
2021
47.8 mm (1.9 in)
2022
22.9 mm (0.9 in)
2023
32.5 mm (1.3 in)
2024
45.7 mm (1.8 in)
2025
30.7 mm (1.2 in)
2026
43.2 mm (1.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Colusa 2 SSW, 1948 to 2026. The record is 165.8 mm (6.5 in) in 1995, marked on the chart; the median year is 66.3 mm (2.6 in).
Wettest five days (Rx5day) at Colusa 2 SSW by year
Year
Wettest five days (Rx5day)
1948
54.4 mm (2.1 in)
1949
75.3 mm (3.0 in)
1950
77.7 mm (3.1 in)
1951
97.5 mm (3.8 in)
1952
66.5 mm (2.6 in)
1953
55.9 mm (2.2 in)
1954
54.1 mm (2.1 in)
1955
73.1 mm (2.9 in)
1956
48.3 mm (1.9 in)
1957
53.3 mm (2.1 in)
1958
76.2 mm (3.0 in)
1959
57.1 mm (2.2 in)
1960
47.1 mm (1.9 in)
1961
91.8 mm (3.6 in)
1962
157.8 mm (6.2 in)
1963
69.1 mm (2.7 in)
1964
54.4 mm (2.1 in)
1965
96.9 mm (3.8 in)
1966
67.3 mm (2.6 in)
1967
85.5 mm (3.4 in)
1968
70.3 mm (2.8 in)
1969
66.9 mm (2.6 in)
1970
127.8 mm (5.0 in)
1971
39.8 mm (1.6 in)
1972
80.8 mm (3.2 in)
1973
99.3 mm (3.9 in)
1974
59.9 mm (2.4 in)
1975
73.5 mm (2.9 in)
1976
24.9 mm (1.0 in)
1977
49.4 mm (1.9 in)
1978
117.1 mm (4.6 in)
1979
64.5 mm (2.5 in)
1980
117.9 mm (4.6 in)
1981
59.2 mm (2.3 in)
1982
61.2 mm (2.4 in)
1983
127.2 mm (5.0 in)
1984
66.0 mm (2.6 in)
1985
57.8 mm (2.3 in)
1986
121.9 mm (4.8 in)
1987
46.0 mm (1.8 in)
1988
54.8 mm (2.2 in)
1989
62.5 mm (2.5 in)
1990
55.6 mm (2.2 in)
1991
85.5 mm (3.4 in)
1992
77.3 mm (3.0 in)
1993
58.2 mm (2.3 in)
1994
38.1 mm (1.5 in)
1995
165.8 mm (6.5 in)
1996
38.6 mm (1.5 in)
1997
52.8 mm (2.1 in)
1998
129.0 mm (5.1 in)
1999
44.2 mm (1.7 in)
2000
51.5 mm (2.0 in)
2001
67.0 mm (2.6 in)
2002
95.5 mm (3.8 in)
2003
50.1 mm (2.0 in)
2004
70.8 mm (2.8 in)
2005
86.3 mm (3.4 in)
2006
87.1 mm (3.4 in)
2007
40.7 mm (1.6 in)
2008
107.4 mm (4.2 in)
2009
43.2 mm (1.7 in)
2010
101.1 mm (4.0 in)
2011
40.0 mm (1.6 in)
2012
15.0 mm (0.6 in)
2013
26.2 mm (1.0 in)
2014
100.8 mm (4.0 in)
2015
47.3 mm (1.9 in)
2016
66.3 mm (2.6 in)
2017
84.3 mm (3.3 in)
2018
66.3 mm (2.6 in)
2019
100.6 mm (4.0 in)
2020
33.8 mm (1.3 in)
2021
108.5 mm (4.3 in)
2022
49.0 mm (1.9 in)
2023
78.3 mm (3.1 in)
2024
110.8 mm (4.4 in)
2025
59.1 mm (2.3 in)
2026
63.1 mm (2.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Colusa 2 SSW, 1948 to 2026. The record is 204 days in 2004, marked on the chart; the median year is 108 days.
Longest dry spell (CDD) at Colusa 2 SSW by year
Year
Longest dry spell (CDD)
1948
19 days
1949
160 days
1950
126 days
1951
149 days
1952
197 days
1953
45 days
1954
108 days
1955
134 days
1956
90 days
1957
126 days
1958
63 days
1959
145 days
1960
66 days
1961
105 days
1962
117 days
1963
110 days
1964
83 days
1965
88 days
1966
179 days
1967
96 days
1968
72 days
1969
124 days
1970
111 days
1971
145 days
1972
108 days
1973
120 days
1974
91 days
1975
82 days
1976
65 days
1977
115 days
1978
133 days
1979
151 days
1980
101 days
1981
140 days
1982
79 days
1983
71 days
1984
76 days
1985
122 days
1986
135 days
1987
164 days
1988
132 days
1989
102 days
1990
116 days
1991
118 days
1992
92 days
1993
92 days
1994
105 days
1995
123 days
1996
96 days
1997
31 days
1998
85 days
1999
145 days
2000
84 days
2001
89 days
2002
170 days
2003
104 days
2004
204 days
2005
132 days
2006
135 days
2007
63 days
2008
97 days
2009
99 days
2010
39 days
2011
62 days
2012
61 days
2013
57 days
2014
81 days
2015
189 days
2016
146 days
2017
129 days
2018
129 days
2019
108 days
2020
166 days
2021
176 days
2022
104 days
2023
87 days
2024
110 days
2025
156 days
2026
94 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
51 years with a frost
Across 51 years with a frost, the median last spring frost at Colusa 2 SSW falls on 3 March and the median first autumn frost on 18 November, which leaves a median of 261 days between them.
Fitted over all years, the growing season changes by +6.1 days per decade at this station.
Frost dates and growing season at Colusa 2 SSW
Measure
Median, all years
Earliest period
Recent period (1973 to 2022)
Recent against earliest
Fitted trend
Last spring frost
3 March
n/a
20 February
n/a
-3.9 days per decade
First autumn frost
18 November
n/a
23 November
n/a
+2.2 days per decade
Growing days
261 days
n/a
277 days
n/a
+6.1 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
64 years, 1949 to 2025
A day with at least 34.8 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 95.0 mm (3.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Colusa 2 SSW: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
34.8 mm (1.4 in)
5 years
47.9 mm (1.9 in)
10 years
57.6 mm (2.3 in)
25 years
71.4 mm (2.8 in)
50 years
82.7 mm (3.3 in)
100 years
95.0 mm (3.7 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 1949 to 2025.
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: 90.4 mm (3.6 in) in 1998; 85.1 mm (3.4 in) in 1962; 78.0 mm (3.1 in) in 1970.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Colusa 2 SSW, at 1989. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1989 ran 0.4 C (0.7 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Colusa 2 SSW, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1989
-0.4
-0.7
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Download the Data
Data for Colusa 2 SSW standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Colusa 2 SSW 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.