Record envelope, standing records and threshold days for Ukiah (USC00049122), California, United States, with 121 years of record.
Key Facts for Ukiah
Ukiah (USC00049122) is a weather station in California, United States at 39.15 latitude and -123.21 longitude, 194 m (636 ft) above sea level.
The station reports from 1893 to 2013, 121 years of record.
1,464 records set at Ukiah still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Ukiah set a daily record precipitation of 38.1 mm (1.5 in) on 29 November 2012.
About the Station
Location: California, United States, 39.15 latitude, -123.21 longitude.
Elevation: 194 m (636 ft).
Period of record: 1893 to 2013, 121 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 Ukiah. 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 Ukiah, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
27.8 C (82.0 F)
-11.1 C (12.0 F)
n/a
n/a
Feb
30.0 C (86.0 F)
-7.8 C (18.0 F)
n/a
n/a
Mar
33.9 C (93.0 F)
-5.6 C (21.9 F)
n/a
n/a
Apr
36.7 C (98.1 F)
-5.0 C (23.0 F)
n/a
n/a
May
40.6 C (105.1 F)
-2.2 C (28.0 F)
n/a
n/a
Jun
45.6 C (114.1 F)
1.7 C (35.1 F)
n/a
n/a
Jul
45.6 C (114.1 F)
3.9 C (39.0 F)
n/a
n/a
Aug
45.6 C (114.1 F)
3.3 C (37.9 F)
n/a
n/a
Sep
46.1 C (115.0 F)
-1.1 C (30.0 F)
n/a
n/a
Oct
40.6 C (105.1 F)
-4.4 C (24.1 F)
n/a
n/a
Nov
33.3 C (91.9 F)
-7.2 C (19.0 F)
n/a
n/a
Dec
26.7 C (80.1 F)
-10.6 C (12.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Ukiah still stand. 1920 holds the most, with 35.
Standing records at Ukiah by the year they were set
Year set
Standing records
1893
13
1894
15
1895
17
1896
19
1897
17
1898
22
1899
26
1900
14
1901
26
1902
15
1903
27
1904
17
1905
18
1906
14
1907
12
1908
9
1909
16
1910
18
1911
22
1912
13
1913
19
1914
18
1915
6
1916
31
1917
18
1918
23
1919
30
1920
35
1921
11
1922
17
1923
21
1924
21
1925
13
1926
15
1927
9
1928
6
1929
23
1930
18
1931
13
1932
23
1933
15
1934
12
1935
10
1936
9
1937
10
1938
6
1939
10
1940
6
1941
6
1942
9
1943
8
1944
6
1945
7
1946
6
1947
9
1948
11
1949
12
1950
14
1951
8
1952
9
1953
10
1954
12
1955
12
1956
4
1957
6
1958
20
1959
9
1960
15
1961
10
1962
16
1963
5
1964
13
1965
6
1966
11
1967
21
1968
8
1969
5
1970
7
1971
14
1972
17
1973
14
1974
5
1975
9
1976
7
1977
9
1978
9
1979
8
1980
8
1981
8
1982
9
1983
9
1984
17
1985
7
1986
9
1987
21
1988
8
1989
10
1990
12
1991
8
1992
11
1993
8
1994
7
1995
21
1996
10
1997
11
1998
12
1999
7
2000
10
2001
9
2002
1
2003
6
2004
1
2005
3
2006
8
2007
5
2008
8
2009
2
2010
5
2011
8
All-Time Record Progression
8 new records
8 all-time records were set at Ukiah between 16 August 1933 and 12 February 2001. Each dot is a new record.
When Ukiah set new all-time records
Date
Kind
Detail
1933-08-16
Record high minimum temperature
Record high minimum temperature 20.6 C (69.1 F)
1943-01-21
Record daily precipitation
Record daily precipitation 139.7 mm (5.5 in)
1955-09-03
Record high maximum temperature
Record high maximum temperature 46.1 C (115.0 F)
1961-08-04
Record high minimum temperature
Record high minimum temperature 21.7 C (71.1 F)
1961-08-05
Record high minimum temperature
Record high minimum temperature 22.2 C (72.0 F)
1964-12-22
Record daily precipitation
Record daily precipitation 157.0 mm (6.2 in)
1984-07-16
Record high minimum temperature
Record high minimum temperature 22.8 C (73.0 F)
2001-02-12
Record snow depth
Record snow depth 5.1 cm (2.0 in)
Wettest Day of Each Month
Dec: 157.0 mm (6.2 in)
The wettest day on record for each calendar month at Ukiah. The most was 157.0 mm (6.2 in) on 22 December 1964.
Record daily precipitation for each month at Ukiah
Month
Record daily precipitation (mm)
Date
Jan
143.8 mm (5.7 in)
16 January 1974
Feb
118.1 mm (4.6 in)
24 February 1958
Mar
145.8 mm (5.7 in)
9 March 1995
Apr
58.4 mm (2.3 in)
23 April 1983
May
53.6 mm (2.1 in)
27 May 1990
Jun
33.0 mm (1.3 in)
2 June 1967
Jul
18.5 mm (0.7 in)
8 July 1974
Aug
20.1 mm (0.8 in)
20 August 1997
Sep
57.2 mm (2.3 in)
27 September 1957
Oct
81.0 mm (3.2 in)
12 October 1962
Nov
97.8 mm (3.9 in)
18 November 1920
Dec
157.0 mm (6.2 in)
22 December 1964
Period of Record Coverage
1893 to 2013
Complete yearUnder 90 percent of days
121 years of record at Ukiah, 1893 to 2013. 14 years have data for under 90 percent of days and are left out of rankings: 1902, 1924, 1985, 1989, 2001, 2002, 2004, 2005 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 106 complete years at Ukiah, 1893 to 2011. Blue stripes are years cooler than the station's own mean of 14.7 C (58.5 F); red stripes are warmer. The coolest year was 1893, at 12.4 C (54.3 F), and the warmest was 1934, at 16.0 C (60.9 F). The strongest colour marks a difference of 2.4 C (4.3 F).
Annual mean temperature at Ukiah as warming stripes, 1893 to 2011
Year
Annual mean temperature
Difference from the station mean
1893
12.4 C
-2.36 C
1894
13.4 C
-1.31 C
1895
13.4 C
-1.32 C
1896
13.6 C
-1.19 C
1897
13.4 C
-1.30 C
1898
13.2 C
-1.59 C
1899
13.9 C
-0.86 C
1900
14.6 C
-0.12 C
1901
14.1 C
-0.63 C
1903
14.0 C
-0.70 C
1904
14.5 C
-0.24 C
1905
14.3 C
-0.42 C
1906
14.6 C
-0.10 C
1907
14.0 C
-0.77 C
1908
14.0 C
-0.74 C
1909
14.1 C
-0.68 C
1910
14.7 C
-0.03 C
1911
13.6 C
-1.10 C
1912
13.8 C
-0.93 C
1913
14.1 C
-0.64 C
1914
14.3 C
-0.47 C
1915
14.0 C
-0.72 C
1916
13.5 C
-1.20 C
1917
14.1 C
-0.67 C
1918
14.2 C
-0.52 C
1919
13.7 C
-1.03 C
1920
13.3 C
-1.42 C
1921
14.2 C
-0.59 C
1922
13.6 C
-1.15 C
1923
13.3 C
-1.45 C
1925
14.8 C
+0.01 C
1926
15.7 C
+0.97 C
1927
14.3 C
-0.40 C
1928
14.8 C
+0.01 C
1929
14.4 C
-0.39 C
1930
14.6 C
-0.17 C
1931
15.5 C
+0.75 C
1932
15.3 C
+0.57 C
1933
14.9 C
+0.17 C
1934
16.0 C
+1.30 C
1935
14.7 C
-0.09 C
1936
15.6 C
+0.82 C
1937
14.5 C
-0.21 C
1938
15.0 C
+0.23 C
1939
15.3 C
+0.60 C
1940
15.4 C
+0.69 C
1941
14.9 C
+0.11 C
1942
14.7 C
0.00 C
1943
15.0 C
+0.21 C
1944
14.6 C
-0.11 C
1945
15.0 C
+0.25 C
1946
14.2 C
-0.50 C
1947
15.4 C
+0.64 C
1948
14.0 C
-0.75 C
1949
14.9 C
+0.11 C
1950
15.6 C
+0.87 C
1951
15.4 C
+0.68 C
1952
15.3 C
+0.54 C
1953
15.3 C
+0.55 C
1954
15.1 C
+0.40 C
1955
14.9 C
+0.17 C
1956
14.8 C
+0.10 C
1957
14.9 C
+0.13 C
1958
16.0 C
+1.28 C
1959
15.6 C
+0.89 C
1960
15.6 C
+0.83 C
1961
15.4 C
+0.62 C
1962
15.2 C
+0.44 C
1963
14.8 C
+0.04 C
1964
14.6 C
-0.15 C
1965
14.8 C
+0.05 C
1966
15.4 C
+0.62 C
1967
15.4 C
+0.65 C
1968
15.3 C
+0.55 C
1969
15.3 C
+0.53 C
1970
15.5 C
+0.71 C
1971
14.3 C
-0.40 C
1972
14.7 C
-0.04 C
1973
15.3 C
+0.52 C
1974
15.2 C
+0.45 C
1975
14.7 C
-0.06 C
1977
15.3 C
+0.52 C
1978
15.4 C
+0.67 C
1979
15.5 C
+0.76 C
1980
15.5 C
+0.76 C
1981
16.0 C
+1.27 C
1982
14.6 C
-0.12 C
1984
15.5 C
+0.75 C
1986
15.9 C
+1.14 C
1987
15.8 C
+1.02 C
1988
15.5 C
+0.80 C
1990
14.7 C
-0.02 C
1991
15.2 C
+0.45 C
1992
15.9 C
+1.20 C
1993
14.6 C
-0.19 C
1994
14.6 C
-0.14 C
1995
15.2 C
+0.50 C
1996
15.8 C
+1.01 C
1997
15.2 C
+0.50 C
1998
14.4 C
-0.30 C
2000
15.0 C
+0.28 C
2003
15.2 C
+0.42 C
2006
15.0 C
+0.24 C
2007
14.5 C
-0.28 C
2008
14.6 C
-0.11 C
2011
14.2 C
-0.53 C
The annual mean temperature here has risen by 0.1 C (0.1 to 0.2) per decade over 1893 to 2011. In Fahrenheit: 0.2 F (0.2 to 0.3) per decade. The slope is a straight line fitted to 106 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Ukiah
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 (0.2 to 0.3) per decade
1893 to 2011
106
Rise
Mean daily maximum
0.03 C (-0.02 to 0.09) per decade
0.06 F (-0.04 to 0.16) per decade
1893 to 2011
106
Not clearly different from zero
Mean daily minimum
0.2 C (0.2 to 0.3) per decade
0.4 F (0.4 to 0.5) per decade
1893 to 2011
106
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
1893 to 2013
Yearly extremes at Ukiah: 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)
1955
42.2 C (108.0 F)
121
Coldest night (TNn)
-11.1 C (12.0 F)
1898
-5.6 C (21.9 F)
121
Wettest day (Rx1day)
157.0 mm (6.2 in)
1964
69.3 mm (2.7 in)
121
Wettest five days (Rx5day)
377.1 mm (14.8 in)
1964
154.3 mm (6.1 in)
121
Longest dry spell (CDD)
191 days
1903
110 days
121
Hottest day (TXx)
The hottest day of the year at Ukiah, 1893 to 2013. The record is 46.1 C (115.0 F) in 1955, marked on the chart; the median year is 42.2 C (108.0 F).
Hottest day (TXx) at Ukiah by year
Year
Hottest day (TXx)
1893
37.2 C (99.0 F)
1894
39.4 C (102.9 F)
1895
40.0 C (104.0 F)
1896
37.8 C (100.0 F)
1897
40.6 C (105.1 F)
1898
39.4 C (102.9 F)
1899
42.2 C (108.0 F)
1900
40.0 C (104.0 F)
1901
42.2 C (108.0 F)
1902
44.4 C (111.9 F)
1903
43.9 C (111.0 F)
1904
42.2 C (108.0 F)
1905
43.9 C (111.0 F)
1906
42.2 C (108.0 F)
1907
40.0 C (104.0 F)
1908
45.6 C (114.1 F)
1909
40.6 C (105.1 F)
1910
43.3 C (109.9 F)
1911
43.9 C (111.0 F)
1912
40.0 C (104.0 F)
1913
43.9 C (111.0 F)
1914
42.2 C (108.0 F)
1915
42.2 C (108.0 F)
1916
42.8 C (109.0 F)
1917
41.1 C (106.0 F)
1918
43.3 C (109.9 F)
1919
43.3 C (109.9 F)
1920
41.7 C (107.1 F)
1921
41.1 C (106.0 F)
1922
42.8 C (109.0 F)
1923
43.9 C (111.0 F)
1924
45.0 C (113.0 F)
1925
45.0 C (113.0 F)
1926
43.9 C (111.0 F)
1927
41.7 C (107.1 F)
1928
40.6 C (105.1 F)
1929
43.3 C (109.9 F)
1930
40.6 C (105.1 F)
1931
44.4 C (111.9 F)
1932
43.9 C (111.0 F)
1933
43.9 C (111.0 F)
1934
43.3 C (109.9 F)
1935
43.3 C (109.9 F)
1936
42.2 C (108.0 F)
1937
42.2 C (108.0 F)
1938
43.9 C (111.0 F)
1939
43.3 C (109.9 F)
1940
41.7 C (107.1 F)
1941
41.1 C (106.0 F)
1942
43.3 C (109.9 F)
1943
42.2 C (108.0 F)
1944
42.8 C (109.0 F)
1945
42.2 C (108.0 F)
1946
42.2 C (108.0 F)
1947
41.7 C (107.1 F)
1948
41.7 C (107.1 F)
1949
40.0 C (104.0 F)
1950
44.4 C (111.9 F)
1951
41.7 C (107.1 F)
1952
41.1 C (106.0 F)
1953
42.2 C (108.0 F)
1954
41.7 C (107.1 F)
1955
46.1 C (115.0 F)
1956
42.2 C (108.0 F)
1957
42.8 C (109.0 F)
1958
41.7 C (107.1 F)
1959
43.9 C (111.0 F)
1960
43.9 C (111.0 F)
1961
45.6 C (114.1 F)
1962
40.0 C (104.0 F)
1963
40.0 C (104.0 F)
1964
43.3 C (109.9 F)
1965
39.4 C (102.9 F)
1966
43.9 C (111.0 F)
1967
42.8 C (109.0 F)
1968
41.7 C (107.1 F)
1969
41.1 C (106.0 F)
1970
41.7 C (107.1 F)
1971
43.9 C (111.0 F)
1972
45.6 C (114.1 F)
1973
43.3 C (109.9 F)
1974
41.7 C (107.1 F)
1975
42.8 C (109.0 F)
1976
41.1 C (106.0 F)
1977
43.9 C (111.0 F)
1978
44.4 C (111.9 F)
1979
40.6 C (105.1 F)
1980
42.2 C (108.0 F)
1981
45.0 C (113.0 F)
1982
41.1 C (106.0 F)
1983
40.0 C (104.0 F)
1984
42.2 C (108.0 F)
1985
42.2 C (108.0 F)
1986
40.0 C (104.0 F)
1987
42.2 C (108.0 F)
1988
42.8 C (109.0 F)
1989
37.8 C (100.0 F)
1990
41.7 C (107.1 F)
1991
41.7 C (107.1 F)
1992
40.0 C (104.0 F)
1993
41.7 C (107.1 F)
1994
37.8 C (100.0 F)
1995
38.9 C (102.0 F)
1996
40.6 C (105.1 F)
1997
40.6 C (105.1 F)
1998
42.2 C (108.0 F)
1999
41.1 C (106.0 F)
2000
41.1 C (106.0 F)
2001
40.6 C (105.1 F)
2002
41.7 C (107.1 F)
2003
40.6 C (105.1 F)
2004
38.9 C (102.0 F)
2005
39.4 C (102.9 F)
2006
42.8 C (109.0 F)
2007
41.1 C (106.0 F)
2008
41.7 C (107.1 F)
2009
40.6 C (105.1 F)
2010
41.1 C (106.0 F)
2011
39.4 C (102.9 F)
2012
40.6 C (105.1 F)
2013
32.8 C (91.0 F)
Coldest night (TNn)
The coldest night of the year at Ukiah, 1893 to 2013. The record is -11.1 C (12.0 F) in 1898, marked on the chart; the median year is -5.6 C (21.9 F).
Coldest night (TNn) at Ukiah by year
Year
Coldest night (TNn)
1893
-4.4 C (24.1 F)
1894
-5.6 C (21.9 F)
1895
-6.7 C (19.9 F)
1896
-6.7 C (19.9 F)
1897
-5.0 C (23.0 F)
1898
-11.1 C (12.0 F)
1899
-6.7 C (19.9 F)
1900
-6.1 C (21.0 F)
1901
-7.2 C (19.0 F)
1902
-6.1 C (21.0 F)
1903
-7.8 C (18.0 F)
1904
-3.9 C (25.0 F)
1905
-6.1 C (21.0 F)
1906
-5.6 C (21.9 F)
1907
-5.0 C (23.0 F)
1908
-6.1 C (21.0 F)
1909
-4.4 C (24.1 F)
1910
-7.8 C (18.0 F)
1911
-6.1 C (21.0 F)
1912
-5.6 C (21.9 F)
1913
-9.4 C (15.1 F)
1914
-5.0 C (23.0 F)
1915
-6.7 C (19.9 F)
1916
-6.7 C (19.9 F)
1917
-8.9 C (16.0 F)
1918
-7.8 C (18.0 F)
1919
-8.3 C (17.1 F)
1920
-6.7 C (19.9 F)
1921
-6.7 C (19.9 F)
1922
-9.4 C (15.1 F)
1923
-6.1 C (21.0 F)
1924
-7.2 C (19.0 F)
1925
-6.1 C (21.0 F)
1926
-5.6 C (21.9 F)
1927
-3.9 C (25.0 F)
1928
-5.6 C (21.9 F)
1929
-7.2 C (19.0 F)
1930
-8.3 C (17.1 F)
1931
-5.0 C (23.0 F)
1932
-10.6 C (12.9 F)
1933
-5.6 C (21.9 F)
1934
-2.2 C (28.0 F)
1935
-4.4 C (24.1 F)
1936
-5.6 C (21.9 F)
1937
-8.9 C (16.0 F)
1938
-3.9 C (25.0 F)
1939
-4.4 C (24.1 F)
1940
-8.9 C (16.0 F)
1941
-3.3 C (26.1 F)
1942
-5.0 C (23.0 F)
1943
-7.2 C (19.0 F)
1944
-3.3 C (26.1 F)
1945
-4.4 C (24.1 F)
1946
-6.1 C (21.0 F)
1947
-5.6 C (21.9 F)
1948
-7.8 C (18.0 F)
1949
-10.0 C (14.0 F)
1950
-6.7 C (19.9 F)
1951
-3.9 C (25.0 F)
1952
-4.4 C (24.1 F)
1953
-4.4 C (24.1 F)
1954
-6.1 C (21.0 F)
1955
-3.9 C (25.0 F)
1956
-5.6 C (21.9 F)
1957
-7.2 C (19.0 F)
1958
-5.6 C (21.9 F)
1959
-3.9 C (25.0 F)
1960
-6.1 C (21.0 F)
1961
-5.0 C (23.0 F)
1962
-7.2 C (19.0 F)
1963
-7.2 C (19.0 F)
1964
-3.3 C (26.1 F)
1965
-5.6 C (21.9 F)
1966
-4.4 C (24.1 F)
1967
-4.4 C (24.1 F)
1968
-6.1 C (21.0 F)
1969
-3.3 C (26.1 F)
1970
-4.4 C (24.1 F)
1971
-5.6 C (21.9 F)
1972
-10.6 C (12.9 F)
1973
-4.4 C (24.1 F)
1974
-5.6 C (21.9 F)
1975
-6.1 C (21.0 F)
1976
-5.6 C (21.9 F)
1977
-4.4 C (24.1 F)
1978
-5.6 C (21.9 F)
1979
-5.6 C (21.9 F)
1980
-4.4 C (24.1 F)
1981
-1.7 C (28.9 F)
1982
-4.4 C (24.1 F)
1983
-3.3 C (26.1 F)
1984
-3.3 C (26.1 F)
1985
-3.3 C (26.1 F)
1986
-1.7 C (28.9 F)
1987
-6.1 C (21.0 F)
1988
-3.3 C (26.1 F)
1989
-7.8 C (18.0 F)
1990
-9.4 C (15.1 F)
1991
-4.4 C (24.1 F)
1992
-2.8 C (27.0 F)
1993
-3.9 C (25.0 F)
1994
-3.3 C (26.1 F)
1995
-4.4 C (24.1 F)
1996
-2.8 C (27.0 F)
1997
-5.6 C (21.9 F)
1998
-7.2 C (19.0 F)
1999
-2.2 C (28.0 F)
2000
-2.2 C (28.0 F)
2001
-6.1 C (21.0 F)
2002
-3.9 C (25.0 F)
2003
-3.3 C (26.1 F)
2004
-3.9 C (25.0 F)
2005
-2.8 C (27.0 F)
2006
-4.4 C (24.1 F)
2007
-7.2 C (19.0 F)
2008
-4.4 C (24.1 F)
2009
-3.3 C (26.1 F)
2010
-2.8 C (27.0 F)
2011
-5.0 C (23.0 F)
2012
-5.6 C (21.9 F)
2013
-4.4 C (24.1 F)
Wettest day (Rx1day)
The wettest day of the year at Ukiah, 1893 to 2013. The record is 157.0 mm (6.2 in) in 1964, marked on the chart; the median year is 69.3 mm (2.7 in).
Wettest day (Rx1day) at Ukiah by year
Year
Wettest day (Rx1day)
1893
92.2 mm (3.6 in)
1894
134.6 mm (5.3 in)
1895
103.4 mm (4.1 in)
1896
71.9 mm (2.8 in)
1897
69.3 mm (2.7 in)
1898
43.2 mm (1.7 in)
1899
60.7 mm (2.4 in)
1900
52.1 mm (2.1 in)
1901
111.8 mm (4.4 in)
1902
78.5 mm (3.1 in)
1903
48.5 mm (1.9 in)
1904
77.5 mm (3.1 in)
1905
51.8 mm (2.0 in)
1906
132.1 mm (5.2 in)
1907
111.8 mm (4.4 in)
1908
43.2 mm (1.7 in)
1909
91.4 mm (3.6 in)
1910
38.1 mm (1.5 in)
1911
71.1 mm (2.8 in)
1912
50.8 mm (2.0 in)
1913
78.7 mm (3.1 in)
1914
83.8 mm (3.3 in)
1915
86.4 mm (3.4 in)
1916
58.9 mm (2.3 in)
1917
102.1 mm (4.0 in)
1918
50.3 mm (2.0 in)
1919
56.6 mm (2.2 in)
1920
97.8 mm (3.9 in)
1921
37.8 mm (1.5 in)
1922
50.8 mm (2.0 in)
1923
48.8 mm (1.9 in)
1924
61.0 mm (2.4 in)
1925
49.3 mm (1.9 in)
1926
70.6 mm (2.8 in)
1927
54.6 mm (2.1 in)
1928
66.5 mm (2.6 in)
1929
81.8 mm (3.2 in)
1930
47.0 mm (1.9 in)
1931
77.2 mm (3.0 in)
1932
57.7 mm (2.3 in)
1933
54.4 mm (2.1 in)
1934
46.5 mm (1.8 in)
1935
41.9 mm (1.6 in)
1936
68.6 mm (2.7 in)
1937
108.2 mm (4.3 in)
1938
53.8 mm (2.1 in)
1939
46.2 mm (1.8 in)
1940
76.2 mm (3.0 in)
1941
62.7 mm (2.5 in)
1942
60.7 mm (2.4 in)
1943
139.7 mm (5.5 in)
1944
48.8 mm (1.9 in)
1945
56.4 mm (2.2 in)
1946
64.8 mm (2.6 in)
1947
51.1 mm (2.0 in)
1948
63.2 mm (2.5 in)
1949
37.6 mm (1.5 in)
1950
102.6 mm (4.0 in)
1951
78.0 mm (3.1 in)
1952
65.8 mm (2.6 in)
1953
63.2 mm (2.5 in)
1954
94.0 mm (3.7 in)
1955
101.1 mm (4.0 in)
1956
76.2 mm (3.0 in)
1957
69.9 mm (2.8 in)
1958
118.1 mm (4.6 in)
1959
84.3 mm (3.3 in)
1960
85.6 mm (3.4 in)
1961
81.8 mm (3.2 in)
1962
81.0 mm (3.2 in)
1963
97.8 mm (3.9 in)
1964
157.0 mm (6.2 in)
1965
68.3 mm (2.7 in)
1966
95.8 mm (3.8 in)
1967
79.5 mm (3.1 in)
1968
104.4 mm (4.1 in)
1969
90.9 mm (3.6 in)
1970
118.9 mm (4.7 in)
1971
74.2 mm (2.9 in)
1972
46.0 mm (1.8 in)
1973
64.5 mm (2.5 in)
1974
143.8 mm (5.7 in)
1975
61.2 mm (2.4 in)
1976
30.7 mm (1.2 in)
1977
80.3 mm (3.2 in)
1978
54.6 mm (2.1 in)
1979
108.2 mm (4.3 in)
1980
80.5 mm (3.2 in)
1981
70.4 mm (2.8 in)
1982
57.7 mm (2.3 in)
1983
87.1 mm (3.4 in)
1984
37.1 mm (1.5 in)
1985
50.0 mm (2.0 in)
1986
104.6 mm (4.1 in)
1987
55.6 mm (2.2 in)
1988
51.6 mm (2.0 in)
1989
56.6 mm (2.2 in)
1990
82.8 mm (3.3 in)
1991
54.6 mm (2.1 in)
1992
80.0 mm (3.1 in)
1993
109.2 mm (4.3 in)
1994
52.1 mm (2.1 in)
1995
145.8 mm (5.7 in)
1996
73.4 mm (2.9 in)
1997
96.3 mm (3.8 in)
1998
94.0 mm (3.7 in)
1999
51.1 mm (2.0 in)
2000
47.8 mm (1.9 in)
2001
58.9 mm (2.3 in)
2002
116.8 mm (4.6 in)
2003
73.7 mm (2.9 in)
2004
76.5 mm (3.0 in)
2005
129.3 mm (5.1 in)
2006
58.4 mm (2.3 in)
2007
49.8 mm (2.0 in)
2008
66.0 mm (2.6 in)
2009
72.6 mm (2.9 in)
2010
56.6 mm (2.2 in)
2011
54.4 mm (2.1 in)
2012
64.5 mm (2.5 in)
2013
16.5 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Ukiah, 1893 to 2013. The record is 377.1 mm (14.8 in) in 1964, marked on the chart; the median year is 154.3 mm (6.1 in).
Wettest five days (Rx5day) at Ukiah by year
Year
Wettest five days (Rx5day)
1893
184.0 mm (7.2 in)
1894
206.8 mm (8.1 in)
1895
194.6 mm (7.7 in)
1896
214.9 mm (8.5 in)
1897
144.9 mm (5.7 in)
1898
75.0 mm (3.0 in)
1899
95.5 mm (3.8 in)
1900
121.2 mm (4.8 in)
1901
175.8 mm (6.9 in)
1902
199.9 mm (7.9 in)
1903
151.3 mm (6.0 in)
1904
148.9 mm (5.9 in)
1905
100.8 mm (4.0 in)
1906
283.3 mm (11.2 in)
1907
265.2 mm (10.4 in)
1908
83.7 mm (3.3 in)
1909
257.1 mm (10.1 in)
1910
85.6 mm (3.4 in)
1911
126.0 mm (5.0 in)
1912
118.6 mm (4.7 in)
1913
156.4 mm (6.2 in)
1914
199.9 mm (7.9 in)
1915
250.0 mm (9.8 in)
1916
123.9 mm (4.9 in)
1917
195.3 mm (7.7 in)
1918
78.7 mm (3.1 in)
1919
138.4 mm (5.4 in)
1920
155.1 mm (6.1 in)
1921
119.0 mm (4.7 in)
1922
111.2 mm (4.4 in)
1923
91.8 mm (3.6 in)
1924
95.3 mm (3.8 in)
1925
94.9 mm (3.7 in)
1926
184.9 mm (7.3 in)
1927
147.2 mm (5.8 in)
1928
185.7 mm (7.3 in)
1929
184.6 mm (7.3 in)
1930
102.9 mm (4.1 in)
1931
184.2 mm (7.3 in)
1932
107.8 mm (4.2 in)
1933
118.5 mm (4.7 in)
1934
133.4 mm (5.3 in)
1935
85.6 mm (3.4 in)
1936
128.8 mm (5.1 in)
1937
230.3 mm (9.1 in)
1938
146.6 mm (5.8 in)
1939
91.7 mm (3.6 in)
1940
221.8 mm (8.7 in)
1941
186.7 mm (7.4 in)
1942
171.7 mm (6.8 in)
1943
277.6 mm (10.9 in)
1944
115.9 mm (4.6 in)
1945
141.9 mm (5.6 in)
1946
154.3 mm (6.1 in)
1947
98.8 mm (3.9 in)
1948
83.0 mm (3.3 in)
1949
80.0 mm (3.1 in)
1950
164.0 mm (6.5 in)
1951
179.3 mm (7.1 in)
1952
196.9 mm (7.8 in)
1953
140.2 mm (5.5 in)
1954
175.8 mm (6.9 in)
1955
302.5 mm (11.9 in)
1956
166.6 mm (6.6 in)
1957
163.4 mm (6.4 in)
1958
155.9 mm (6.1 in)
1959
179.8 mm (7.1 in)
1960
197.6 mm (7.8 in)
1961
134.6 mm (5.3 in)
1962
196.5 mm (7.7 in)
1963
217.7 mm (8.6 in)
1964
377.1 mm (14.8 in)
1965
167.7 mm (6.6 in)
1966
163.4 mm (6.4 in)
1967
173.1 mm (6.8 in)
1968
206.5 mm (8.1 in)
1969
168.5 mm (6.6 in)
1970
271.4 mm (10.7 in)
1971
138.5 mm (5.5 in)
1972
105.6 mm (4.2 in)
1973
162.2 mm (6.4 in)
1974
239.7 mm (9.4 in)
1975
125.5 mm (4.9 in)
1976
70.1 mm (2.8 in)
1977
119.5 mm (4.7 in)
1978
181.9 mm (7.2 in)
1979
185.3 mm (7.3 in)
1980
193.7 mm (7.6 in)
1981
152.0 mm (6.0 in)
1982
148.7 mm (5.9 in)
1983
213.3 mm (8.4 in)
1984
105.8 mm (4.2 in)
1985
83.6 mm (3.3 in)
1986
300.8 mm (11.8 in)
1987
125.2 mm (4.9 in)
1988
109.7 mm (4.3 in)
1989
91.5 mm (3.6 in)
1990
89.2 mm (3.5 in)
1991
169.9 mm (6.7 in)
1992
177.1 mm (7.0 in)
1993
163.1 mm (6.4 in)
1994
131.3 mm (5.2 in)
1995
297.7 mm (11.7 in)
1996
155.1 mm (6.1 in)
1997
235.1 mm (9.3 in)
1998
204.2 mm (8.0 in)
1999
143.5 mm (5.6 in)
2000
121.6 mm (4.8 in)
2001
104.5 mm (4.1 in)
2002
283.2 mm (11.1 in)
2003
127.4 mm (5.0 in)
2004
158.5 mm (6.2 in)
2005
281.7 mm (11.1 in)
2006
258.5 mm (10.2 in)
2007
126.6 mm (5.0 in)
2008
145.3 mm (5.7 in)
2009
108.9 mm (4.3 in)
2010
94.8 mm (3.7 in)
2011
139.5 mm (5.5 in)
2012
138.5 mm (5.5 in)
2013
0.3 mm (0.01 in)
Longest dry spell (CDD)
The longest dry spell of the year at Ukiah, 1893 to 2013. The record is 191 days in 1903, marked on the chart; the median year is 110 days.
Longest dry spell (CDD) at Ukiah by year
Year
Longest dry spell (CDD)
1893
110 days
1894
28 days
1895
36 days
1896
92 days
1897
38 days
1898
52 days
1899
132 days
1900
40 days
1901
117 days
1902
43 days
1903
191 days
1904
69 days
1905
176 days
1906
99 days
1907
134 days
1908
91 days
1909
82 days
1910
122 days
1911
115 days
1912
69 days
1913
76 days
1914
85 days
1915
150 days
1916
36 days
1917
126 days
1918
155 days
1919
115 days
1920
79 days
1921
110 days
1922
113 days
1923
49 days
1924
184 days
1925
82 days
1926
166 days
1927
130 days
1928
125 days
1929
174 days
1930
102 days
1931
127 days
1932
144 days
1933
129 days
1934
89 days
1935
137 days
1936
113 days
1937
68 days
1938
122 days
1939
88 days
1940
95 days
1941
107 days
1942
134 days
1943
128 days
1944
117 days
1945
112 days
1946
59 days
1947
120 days
1948
101 days
1949
73 days
1950
80 days
1951
99 days
1952
110 days
1953
80 days
1954
78 days
1955
136 days
1956
98 days
1957
127 days
1958
86 days
1959
115 days
1960
132 days
1961
92 days
1962
72 days
1963
146 days
1964
90 days
1965
112 days
1966
139 days
1967
119 days
1968
85 days
1969
166 days
1970
126 days
1971
93 days
1972
67 days
1973
118 days
1974
82 days
1975
72 days
1976
49 days
1977
90 days
1978
112 days
1979
116 days
1980
104 days
1981
121 days
1982
77 days
1983
49 days
1984
130 days
1985
98 days
1986
131 days
1987
173 days
1988
119 days
1989
31 days
1990
114 days
1991
99 days
1992
92 days
1993
121 days
1994
141 days
1995
158 days
1996
80 days
1997
75 days
1998
133 days
1999
95 days
2000
85 days
2001
66 days
2002
71 days
2003
123 days
2004
133 days
2005
129 days
2006
135 days
2007
160 days
2008
147 days
2009
126 days
2010
101 days
2011
31 days
2012
12 days
2013
12 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
106 years with a frost
Across 106 years with a frost, the median last spring frost at Ukiah falls on 4 April and the median first autumn frost on 7 November, which leaves a median of 214 days between them.
In 1971 to 2011 the median growing season was 247 days. That is 56 days more than in 1893 to 1923.
Fitted over all years, the growing season changes by +6.2 days per decade at this station.
Frost dates and growing season at Ukiah
Measure
Median, all years
Earliest period (1893 to 1923)
Recent period (1971 to 2011)
Recent against earliest
Fitted trend
Last spring frost
4 April
19 April
14 March
36 days earlier
-3.5 days per decade
First autumn frost
7 November
25 October
15 November
21 days later
+2.6 days per decade
Growing days
214 days
191 days
247 days
56 days more
+6.2 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
108 years, 1893 to 2008
A day with at least 69.8 mm (2.7 in) of rain is expected about once in 2 years. A day with at least 163.4 mm (6.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Ukiah: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
69.8 mm (2.7 in)
5 years
93.9 mm (3.7 in)
10 years
110.2 mm (4.3 in)
25 years
131.3 mm (5.2 in)
50 years
147.2 mm (5.8 in)
100 years
163.4 mm (6.4 in)
The levels come from a generalised extreme value (GEV) distribution fitted by L-moments to the wettest-day total of each year, 108 years of values from 1893 to 2008.
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: 157.0 mm (6.2 in) in 1964; 145.8 mm (5.7 in) in 1995; 143.8 mm (5.7 in) in 1974.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Ukiah standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Ukiah 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.