Record envelope, standing records and threshold days for Healdsburg (USC00043875), California, United States, with 134 years of record.
Key Facts for Healdsburg
Healdsburg (USC00043875) is a weather station in California, United States at 38.63 latitude and -122.87 longitude, 54 m (177 ft) above sea level.
The station reports from 1893 to 2026, 134 years of record.
1,464 records set at Healdsburg still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Healdsburg set a daily record high maximum temperature of 40.6 C (105.1 F) on 11 June 2026.
About the Station
Location: California, United States, 38.63 latitude, -122.87 longitude.
Elevation: 54 m (177 ft).
Period of record: 1893 to 2026, 134 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
9 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 Healdsburg. The lines show the 2026 daily maximum and minimum. 9 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Healdsburg, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
29.4 C (84.9 F)
-7.8 C (18.0 F)
23.3 C (73.9 F)
-0.6 C (30.9 F)
Feb
31.1 C (88.0 F)
-6.1 C (21.0 F)
27.8 C (82.0 F)
-0.6 C (30.9 F)
Mar
35.0 C (95.0 F)
-2.8 C (27.0 F)
34.4 C (93.9 F)
5.0 C (41.0 F)
Apr
38.9 C (102.0 F)
-4.4 C (24.1 F)
29.4 C (84.9 F)
4.4 C (39.9 F)
May
42.2 C (108.0 F)
-1.1 C (30.0 F)
33.9 C (93.0 F)
8.9 C (48.0 F)
Jun
46.7 C (116.1 F)
0.0 C (32.0 F)
40.6 C (105.1 F)
10.0 C (50.0 F)
Jul
46.7 C (116.1 F)
-0.6 C (30.9 F)
38.9 C (102.0 F)
10.0 C (50.0 F)
Aug
45.6 C (114.1 F)
0.6 C (33.1 F)
37.2 C (99.0 F)
9.4 C (48.9 F)
Sep
47.2 C (117.0 F)
-1.1 C (30.0 F)
33.3 C (91.9 F)
8.9 C (48.0 F)
Oct
42.2 C (108.0 F)
-3.3 C (26.1 F)
35.0 C (95.0 F)
15.6 C (60.1 F)
Nov
36.7 C (98.1 F)
-3.9 C (25.0 F)
n/a
n/a
Dec
28.3 C (82.9 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 Healdsburg still stand. 1901 holds the most, with 44.
Standing records at Healdsburg by the year they were set
Year set
Standing records
1898
2
1899
27
1900
25
1901
44
1902
21
1903
25
1904
13
1905
21
1906
24
1907
11
1908
16
1909
23
1910
14
1911
19
1912
22
1913
17
1914
13
1915
11
1916
23
1917
12
1918
10
1919
19
1920
21
1921
16
1922
12
1923
19
1924
16
1925
9
1926
20
1927
14
1928
7
1929
29
1930
12
1931
9
1932
19
1933
12
1934
9
1935
15
1936
4
1937
8
1938
5
1939
9
1940
5
1941
3
1942
4
1943
7
1944
10
1945
11
1946
8
1947
10
1948
9
1949
17
1950
16
1951
8
1952
12
1953
10
1954
6
1955
16
1956
3
1957
8
1958
12
1959
12
1960
8
1961
15
1962
11
1963
14
1964
10
1965
8
1966
10
1967
18
1968
10
1969
8
1970
8
1971
6
1972
18
1973
12
1974
10
1975
5
1976
13
1977
15
1978
12
1979
12
1980
7
1981
12
1982
8
1983
8
1984
19
1985
18
1986
8
1987
11
1988
11
1989
14
1990
15
1991
9
1992
6
1993
10
1994
5
1995
8
1996
11
1997
6
1998
4
1999
6
2000
13
2001
5
2002
2
2003
8
2004
10
2005
5
2006
7
2007
5
2008
5
2009
9
2010
4
2011
8
2012
4
2017
4
2018
5
2019
13
2020
16
2021
9
2022
13
2023
6
2024
15
2025
4
2026
11
All-Time Record Progression
8 new records
8 all-time records were set at Healdsburg between 13 January 1929 and 6 September 2022. Each dot is a new record.
When Healdsburg set new all-time records
Date
Kind
Detail
1929-01-13
Record low maximum temperature
Record low maximum temperature 2.8 C (37.0 F)
1932-12-10
Record low maximum temperature
Record low maximum temperature 2.2 C (36.0 F)
1932-12-13
Record low minimum temperature
Record low minimum temperature -8.3 C (17.1 F)
1973-06-26
Record high minimum temperature
Record high minimum temperature 23.9 C (75.0 F)
1977-11-21
Record daily precipitation
Record daily precipitation 166.6 mm (6.6 in)
1980-12-03
Record daily precipitation
Record daily precipitation 207.8 mm (8.2 in)
1990-12-22
Record low minimum temperature
Record low minimum temperature -10.0 C (14.0 F)
2022-09-06
Record high maximum temperature
Record high maximum temperature 47.2 C (117.0 F)
Wettest Day of Each Month
Dec: 207.8 mm (8.2 in)
The wettest day on record for each calendar month at Healdsburg. The most was 207.8 mm (8.2 in) on 3 December 1980.
Record daily precipitation for each month at Healdsburg
Month
Record daily precipitation (mm)
Date
Jan
161.5 mm (6.4 in)
23 January 1916
Feb
165.9 mm (6.5 in)
26 February 2019
Mar
159.0 mm (6.3 in)
9 March 1995
Apr
82.6 mm (3.3 in)
27 April 1953
May
136.7 mm (5.4 in)
18 May 2005
Jun
52.6 mm (2.1 in)
2 June 1967
Jul
40.4 mm (1.6 in)
8 July 1974
Aug
51.6 mm (2.0 in)
28 August 1954
Sep
114.8 mm (4.5 in)
18 September 1959
Oct
165.6 mm (6.5 in)
24 October 2021
Nov
197.6 mm (7.8 in)
20 November 2024
Dec
207.8 mm (8.2 in)
3 December 1980
Period of Record Coverage
1897 to 2026
Complete yearUnder 90 percent of days
126 years of record at Healdsburg, 1897 to 2026. 23 years have data for under 90 percent of days and are left out of rankings: 1897, 1898, 1899, 1904, 1906, 1908, 1915, 1919 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 98 complete years at Healdsburg, 1900 to 2025. Blue stripes are years cooler than the station's own mean of 15.4 C (59.7 F); red stripes are warmer. The coolest year was 1922, at 13.9 C (57.1 F), and the warmest was 1981, at 16.9 C (62.4 F). The strongest colour marks a difference of 1.6 C (2.9 F).
Annual mean temperature at Healdsburg as warming stripes, 1900 to 2025
Year
Annual mean temperature
Difference from the station mean
1900
14.8 C
-0.63 C
1901
14.6 C
-0.83 C
1902
14.1 C
-1.32 C
1907
15.1 C
-0.26 C
1909
14.7 C
-0.70 C
1911
14.0 C
-1.44 C
1912
14.6 C
-0.81 C
1913
15.3 C
-0.13 C
1916
14.5 C
-0.87 C
1918
14.4 C
-0.96 C
1920
14.2 C
-1.20 C
1921
14.8 C
-0.57 C
1922
13.9 C
-1.46 C
1923
14.9 C
-0.52 C
1924
14.6 C
-0.78 C
1925
14.6 C
-0.77 C
1926
15.8 C
+0.38 C
1929
14.6 C
-0.80 C
1930
14.9 C
-0.53 C
1931
15.1 C
-0.27 C
1932
15.1 C
-0.31 C
1933
14.1 C
-1.28 C
1934
15.9 C
+0.54 C
1935
14.7 C
-0.75 C
1936
15.7 C
+0.29 C
1937
15.3 C
-0.06 C
1938
15.0 C
-0.42 C
1939
15.4 C
-0.02 C
1940
15.2 C
-0.17 C
1941
15.7 C
+0.31 C
1942
14.7 C
-0.72 C
1943
15.3 C
-0.08 C
1945
14.9 C
-0.50 C
1947
15.0 C
-0.36 C
1948
14.2 C
-1.25 C
1949
14.4 C
-1.02 C
1950
15.1 C
-0.30 C
1951
14.5 C
-0.89 C
1952
14.5 C
-0.87 C
1953
14.9 C
-0.46 C
1954
14.6 C
-0.79 C
1955
14.5 C
-0.95 C
1956
14.7 C
-0.70 C
1957
14.9 C
-0.52 C
1958
16.4 C
+0.98 C
1959
16.5 C
+1.13 C
1960
15.4 C
+0.03 C
1961
15.5 C
+0.08 C
1962
15.4 C
-0.04 C
1963
15.2 C
-0.19 C
1964
15.5 C
+0.11 C
1965
15.2 C
-0.23 C
1966
15.9 C
+0.52 C
1967
15.7 C
+0.27 C
1968
16.1 C
+0.70 C
1969
15.8 C
+0.43 C
1971
15.5 C
+0.05 C
1972
15.5 C
+0.06 C
1973
16.0 C
+0.57 C
1974
15.8 C
+0.40 C
1975
15.1 C
-0.28 C
1976
16.1 C
+0.66 C
1977
16.1 C
+0.72 C
1978
16.6 C
+1.17 C
1979
16.5 C
+1.08 C
1980
16.2 C
+0.79 C
1981
16.9 C
+1.51 C
1982
15.5 C
+0.11 C
1983
16.3 C
+0.89 C
1984
16.8 C
+1.43 C
1985
15.0 C
-0.40 C
1986
15.7 C
+0.29 C
1987
15.7 C
+0.32 C
1988
15.8 C
+0.39 C
1989
15.1 C
-0.34 C
1990
15.5 C
+0.09 C
1991
15.3 C
-0.09 C
1992
15.9 C
+0.49 C
1993
15.7 C
+0.31 C
1994
15.3 C
-0.12 C
1995
16.2 C
+0.80 C
1996
16.5 C
+1.07 C
1997
16.6 C
+1.15 C
1998
15.3 C
-0.12 C
2001
16.3 C
+0.93 C
2002
16.0 C
+0.56 C
2004
16.6 C
+1.19 C
2005
16.2 C
+0.76 C
2006
15.8 C
+0.39 C
2007
16.0 C
+0.56 C
2008
16.0 C
+0.55 C
2009
15.9 C
+0.45 C
2020
16.8 C
+1.43 C
2021
15.9 C
+0.54 C
2022
16.1 C
+0.73 C
2023
15.2 C
-0.16 C
2024
16.3 C
+0.93 C
2025
15.7 C
+0.32 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.2) per decade over 1900 to 2025. In Fahrenheit: 0.3 F (0.2 to 0.3) per decade. The slope is a straight line fitted to 98 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Healdsburg
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.2) per decade
0.3 F (0.2 to 0.3) per decade
1900 to 2025
98
Rise
Mean daily maximum
0.04 C (-0.01 to 0.08) per decade
0.06 F (-0.02 to 0.15) per decade
1900 to 2025
98
Not clearly different from zero
Mean daily minimum
0.3 C (0.2 to 0.3) per decade
0.5 F (0.4 to 0.6) per decade
1900 to 2025
98
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 2026
Yearly extremes at Healdsburg: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
47.2 C (117.0 F)
2022
41.7 C (107.1 F)
126
Coldest night (TNn)
-10.0 C (14.0 F)
1990
-3.3 C (26.1 F)
126
Wettest day (Rx1day)
207.8 mm (8.2 in)
1980
93.5 mm (3.7 in)
130
Wettest five days (Rx5day)
465.3 mm (18.3 in)
2024
190.5 mm (7.5 in)
130
Longest dry spell (CDD)
177 days
2019
107 days
130
Hottest day (TXx)
The hottest day of the year at Healdsburg, 1893 to 2026. The record is 47.2 C (117.0 F) in 2022, marked on the chart; the median year is 41.7 C (107.1 F).
Hottest day (TXx) at Healdsburg by year
Year
Hottest day (TXx)
1893
n/a
1894
n/a
1895
n/a
1896
n/a
1897
36.7 C (98.1 F)
1898
43.3 C (109.9 F)
1899
41.7 C (107.1 F)
1900
41.1 C (106.0 F)
1901
40.6 C (105.1 F)
1902
38.9 C (102.0 F)
1903
43.9 C (111.0 F)
1904
45.0 C (113.0 F)
1905
46.7 C (116.1 F)
1906
43.3 C (109.9 F)
1907
39.4 C (102.9 F)
1908
41.7 C (107.1 F)
1909
41.1 C (106.0 F)
1910
41.7 C (107.1 F)
1911
40.0 C (104.0 F)
1912
46.7 C (116.1 F)
1913
46.1 C (115.0 F)
1914
38.9 C (102.0 F)
1915
42.2 C (108.0 F)
1916
42.8 C (109.0 F)
1917
42.8 C (109.0 F)
1918
38.3 C (100.9 F)
1919
41.7 C (107.1 F)
1920
43.3 C (109.9 F)
1921
42.8 C (109.0 F)
1922
39.4 C (102.9 F)
1923
41.7 C (107.1 F)
1924
38.9 C (102.0 F)
1925
41.1 C (106.0 F)
1926
43.3 C (109.9 F)
1927
42.2 C (108.0 F)
1928
42.8 C (109.0 F)
1929
40.0 C (104.0 F)
1930
38.9 C (102.0 F)
1931
43.9 C (111.0 F)
1932
41.1 C (106.0 F)
1933
38.9 C (102.0 F)
1934
41.1 C (106.0 F)
1935
41.7 C (107.1 F)
1936
42.2 C (108.0 F)
1937
41.7 C (107.1 F)
1938
41.7 C (107.1 F)
1939
43.9 C (111.0 F)
1940
41.7 C (107.1 F)
1941
40.6 C (105.1 F)
1942
39.4 C (102.9 F)
1943
41.1 C (106.0 F)
1944
43.3 C (109.9 F)
1945
39.4 C (102.9 F)
1946
41.7 C (107.1 F)
1947
40.0 C (104.0 F)
1948
39.4 C (102.9 F)
1949
40.6 C (105.1 F)
1950
43.3 C (109.9 F)
1951
40.6 C (105.1 F)
1952
40.6 C (105.1 F)
1953
42.2 C (108.0 F)
1954
42.8 C (109.0 F)
1955
42.2 C (108.0 F)
1956
38.9 C (102.0 F)
1957
41.1 C (106.0 F)
1958
41.1 C (106.0 F)
1959
44.4 C (111.9 F)
1960
43.9 C (111.0 F)
1961
45.0 C (113.0 F)
1962
40.6 C (105.1 F)
1963
40.6 C (105.1 F)
1964
42.2 C (108.0 F)
1965
37.8 C (100.0 F)
1966
42.2 C (108.0 F)
1967
40.6 C (105.1 F)
1968
42.2 C (108.0 F)
1969
42.2 C (108.0 F)
1970
42.2 C (108.0 F)
1971
45.6 C (114.1 F)
1972
46.7 C (116.1 F)
1973
42.2 C (108.0 F)
1974
40.6 C (105.1 F)
1975
42.2 C (108.0 F)
1976
43.3 C (109.9 F)
1977
43.3 C (109.9 F)
1978
41.1 C (106.0 F)
1979
43.3 C (109.9 F)
1980
42.2 C (108.0 F)
1981
42.8 C (109.0 F)
1982
40.6 C (105.1 F)
1983
41.1 C (106.0 F)
1984
42.2 C (108.0 F)
1985
39.4 C (102.9 F)
1986
38.3 C (100.9 F)
1987
38.3 C (100.9 F)
1988
42.8 C (109.0 F)
1989
39.4 C (102.9 F)
1990
38.9 C (102.0 F)
1991
41.1 C (106.0 F)
1992
37.8 C (100.0 F)
1993
42.8 C (109.0 F)
1994
40.6 C (105.1 F)
1995
41.7 C (107.1 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
45.0 C (113.0 F)
2001
43.3 C (109.9 F)
2002
42.2 C (108.0 F)
2003
41.7 C (107.1 F)
2004
40.0 C (104.0 F)
2005
40.6 C (105.1 F)
2006
44.4 C (111.9 F)
2007
40.6 C (105.1 F)
2008
41.7 C (107.1 F)
2009
40.6 C (105.1 F)
2010
41.1 C (106.0 F)
2011
37.2 C (99.0 F)
2012
40.0 C (104.0 F)
2017
43.9 C (111.0 F)
2018
39.4 C (102.9 F)
2019
39.4 C (102.9 F)
2020
45.6 C (114.1 F)
2021
41.1 C (106.0 F)
2022
47.2 C (117.0 F)
2023
40.0 C (104.0 F)
2024
42.8 C (109.0 F)
2025
38.3 C (100.9 F)
2026
40.6 C (105.1 F)
Coldest night (TNn)
The coldest night of the year at Healdsburg, 1893 to 2026. The record is -10.0 C (14.0 F) in 1990, marked on the chart; the median year is -3.3 C (26.1 F).
Coldest night (TNn) at Healdsburg by year
Year
Coldest night (TNn)
1893
n/a
1894
n/a
1895
n/a
1896
n/a
1897
9.4 C (48.9 F)
1898
-3.9 C (25.0 F)
1899
-2.2 C (28.0 F)
1900
-3.9 C (25.0 F)
1901
-5.0 C (23.0 F)
1902
-3.9 C (25.0 F)
1903
-6.1 C (21.0 F)
1904
-5.6 C (21.9 F)
1905
-6.1 C (21.0 F)
1906
-3.3 C (26.1 F)
1907
-3.9 C (25.0 F)
1908
-5.0 C (23.0 F)
1909
-3.3 C (26.1 F)
1910
-6.7 C (19.9 F)
1911
-3.3 C (26.1 F)
1912
-6.7 C (19.9 F)
1913
-7.2 C (19.0 F)
1914
-6.1 C (21.0 F)
1915
-5.0 C (23.0 F)
1916
-3.9 C (25.0 F)
1917
-5.0 C (23.0 F)
1918
-5.0 C (23.0 F)
1919
-5.6 C (21.9 F)
1920
-5.0 C (23.0 F)
1921
-3.9 C (25.0 F)
1922
-6.1 C (21.0 F)
1923
-4.4 C (24.1 F)
1924
-6.1 C (21.0 F)
1925
-2.8 C (27.0 F)
1926
-5.6 C (21.9 F)
1927
-3.3 C (26.1 F)
1928
-6.1 C (21.0 F)
1929
-5.6 C (21.9 F)
1930
-6.7 C (19.9 F)
1931
-3.9 C (25.0 F)
1932
-8.3 C (17.1 F)
1933
-4.4 C (24.1 F)
1934
-1.1 C (30.0 F)
1935
-2.8 C (27.0 F)
1936
-5.0 C (23.0 F)
1937
-7.8 C (18.0 F)
1938
-2.8 C (27.0 F)
1939
-2.8 C (27.0 F)
1940
-5.6 C (21.9 F)
1941
-2.2 C (28.0 F)
1942
-4.4 C (24.1 F)
1943
-5.6 C (21.9 F)
1944
-2.8 C (27.0 F)
1945
-3.3 C (26.1 F)
1946
-4.4 C (24.1 F)
1947
-5.6 C (21.9 F)
1948
-6.1 C (21.0 F)
1949
-7.2 C (19.0 F)
1950
-5.0 C (23.0 F)
1951
-3.3 C (26.1 F)
1952
-3.3 C (26.1 F)
1953
-2.8 C (27.0 F)
1954
-3.3 C (26.1 F)
1955
-2.2 C (28.0 F)
1956
-3.9 C (25.0 F)
1957
-5.0 C (23.0 F)
1958
-1.7 C (28.9 F)
1959
-1.7 C (28.9 F)
1960
-3.9 C (25.0 F)
1961
-3.3 C (26.1 F)
1962
-3.9 C (25.0 F)
1963
-5.0 C (23.0 F)
1964
-1.1 C (30.0 F)
1965
-5.0 C (23.0 F)
1966
-2.2 C (28.0 F)
1967
-3.3 C (26.1 F)
1968
-3.9 C (25.0 F)
1969
-2.2 C (28.0 F)
1970
-2.8 C (27.0 F)
1971
-2.2 C (28.0 F)
1972
-7.2 C (19.0 F)
1973
-3.3 C (26.1 F)
1974
-2.2 C (28.0 F)
1975
-3.9 C (25.0 F)
1976
-3.3 C (26.1 F)
1977
-2.2 C (28.0 F)
1978
-4.4 C (24.1 F)
1979
-3.3 C (26.1 F)
1980
-2.8 C (27.0 F)
1981
1.1 C (34.0 F)
1982
-2.2 C (28.0 F)
1983
-1.7 C (28.9 F)
1984
-2.2 C (28.0 F)
1985
-2.8 C (27.0 F)
1986
-0.6 C (30.9 F)
1987
-3.9 C (25.0 F)
1988
-2.2 C (28.0 F)
1989
-6.1 C (21.0 F)
1990
-10.0 C (14.0 F)
1991
-3.3 C (26.1 F)
1992
-1.7 C (28.9 F)
1993
-3.3 C (26.1 F)
1994
-1.7 C (28.9 F)
1995
0.0 C (32.0 F)
1996
-1.1 C (30.0 F)
1997
-3.9 C (25.0 F)
1998
-5.6 C (21.9 F)
1999
-1.1 C (30.0 F)
2000
-1.7 C (28.9 F)
2001
-2.8 C (27.0 F)
2002
-2.8 C (27.0 F)
2003
-1.7 C (28.9 F)
2004
-2.2 C (28.0 F)
2005
-1.1 C (30.0 F)
2006
-2.8 C (27.0 F)
2007
-6.1 C (21.0 F)
2008
-2.2 C (28.0 F)
2009
-4.4 C (24.1 F)
2010
-1.7 C (28.9 F)
2011
-3.9 C (25.0 F)
2012
-5.6 C (21.9 F)
2017
-1.1 C (30.0 F)
2018
-2.2 C (28.0 F)
2019
-3.3 C (26.1 F)
2020
-0.6 C (30.9 F)
2021
-2.2 C (28.0 F)
2022
-2.2 C (28.0 F)
2023
-2.2 C (28.0 F)
2024
-1.1 C (30.0 F)
2025
-1.1 C (30.0 F)
2026
-0.6 C (30.9 F)
Wettest day (Rx1day)
The wettest day of the year at Healdsburg, 1893 to 2026. The record is 207.8 mm (8.2 in) in 1980, marked on the chart; the median year is 93.5 mm (3.7 in).
Wettest day (Rx1day) at Healdsburg by year
Year
Wettest day (Rx1day)
1893
99.1 mm (3.9 in)
1894
137.2 mm (5.4 in)
1895
157.2 mm (6.2 in)
1896
106.7 mm (4.2 in)
1897
56.9 mm (2.2 in)
1898
42.7 mm (1.7 in)
1899
117.1 mm (4.6 in)
1900
64.3 mm (2.5 in)
1901
72.9 mm (2.9 in)
1902
143.5 mm (5.6 in)
1903
107.4 mm (4.2 in)
1904
133.4 mm (5.3 in)
1905
91.4 mm (3.6 in)
1906
106.4 mm (4.2 in)
1907
135.6 mm (5.3 in)
1908
42.4 mm (1.7 in)
1909
85.6 mm (3.4 in)
1910
34.8 mm (1.4 in)
1911
50.8 mm (2.0 in)
1912
78.7 mm (3.1 in)
1913
129.5 mm (5.1 in)
1914
72.6 mm (2.9 in)
1915
126.5 mm (5.0 in)
1916
161.5 mm (6.4 in)
1917
95.8 mm (3.8 in)
1918
60.7 mm (2.4 in)
1919
74.9 mm (2.9 in)
1920
98.0 mm (3.9 in)
1921
87.9 mm (3.5 in)
1922
106.2 mm (4.2 in)
1923
51.1 mm (2.0 in)
1924
85.1 mm (3.4 in)
1925
112.8 mm (4.4 in)
1926
100.3 mm (3.9 in)
1927
75.7 mm (3.0 in)
1928
62.0 mm (2.4 in)
1929
103.4 mm (4.1 in)
1930
99.3 mm (3.9 in)
1931
122.4 mm (4.8 in)
1932
47.0 mm (1.9 in)
1933
98.0 mm (3.9 in)
1934
54.6 mm (2.1 in)
1935
91.9 mm (3.6 in)
1936
64.3 mm (2.5 in)
1937
129.5 mm (5.1 in)
1938
81.3 mm (3.2 in)
1939
50.0 mm (2.0 in)
1940
144.8 mm (5.7 in)
1941
70.6 mm (2.8 in)
1942
92.5 mm (3.6 in)
1943
118.1 mm (4.6 in)
1944
57.9 mm (2.3 in)
1945
113.0 mm (4.4 in)
1946
93.5 mm (3.7 in)
1947
54.4 mm (2.1 in)
1948
64.8 mm (2.6 in)
1949
70.1 mm (2.8 in)
1950
130.0 mm (5.1 in)
1951
83.8 mm (3.3 in)
1952
101.6 mm (4.0 in)
1953
82.6 mm (3.3 in)
1954
142.2 mm (5.6 in)
1955
94.7 mm (3.7 in)
1956
70.4 mm (2.8 in)
1957
71.1 mm (2.8 in)
1958
111.5 mm (4.4 in)
1959
140.5 mm (5.5 in)
1960
107.7 mm (4.2 in)
1961
62.2 mm (2.4 in)
1962
124.2 mm (4.9 in)
1963
129.0 mm (5.1 in)
1964
108.7 mm (4.3 in)
1965
85.3 mm (3.4 in)
1966
121.9 mm (4.8 in)
1967
109.5 mm (4.3 in)
1968
87.1 mm (3.4 in)
1969
97.3 mm (3.8 in)
1970
89.2 mm (3.5 in)
1971
63.8 mm (2.5 in)
1972
84.8 mm (3.3 in)
1973
97.5 mm (3.8 in)
1974
77.5 mm (3.1 in)
1975
111.0 mm (4.4 in)
1976
38.9 mm (1.5 in)
1977
166.6 mm (6.6 in)
1978
104.1 mm (4.1 in)
1979
104.4 mm (4.1 in)
1980
207.8 mm (8.2 in)
1981
117.9 mm (4.6 in)
1982
93.5 mm (3.7 in)
1983
138.2 mm (5.4 in)
1984
58.9 mm (2.3 in)
1985
64.5 mm (2.5 in)
1986
127.3 mm (5.0 in)
1987
65.5 mm (2.6 in)
1988
53.3 mm (2.1 in)
1989
59.7 mm (2.4 in)
1990
100.3 mm (3.9 in)
1991
99.3 mm (3.9 in)
1992
63.5 mm (2.5 in)
1993
133.1 mm (5.2 in)
1994
68.1 mm (2.7 in)
1995
159.0 mm (6.3 in)
1996
145.5 mm (5.7 in)
1997
106.4 mm (4.2 in)
1998
86.4 mm (3.4 in)
1999
77.0 mm (3.0 in)
2000
56.9 mm (2.2 in)
2001
71.6 mm (2.8 in)
2002
123.2 mm (4.9 in)
2003
101.6 mm (4.0 in)
2004
94.2 mm (3.7 in)
2005
136.7 mm (5.4 in)
2006
86.6 mm (3.4 in)
2007
79.0 mm (3.1 in)
2008
129.3 mm (5.1 in)
2009
94.7 mm (3.7 in)
2010
77.5 mm (3.1 in)
2011
42.7 mm (1.7 in)
2012
74.4 mm (2.9 in)
2017
45.0 mm (1.8 in)
2018
51.8 mm (2.0 in)
2019
165.9 mm (6.5 in)
2020
31.2 mm (1.2 in)
2021
165.6 mm (6.5 in)
2022
46.5 mm (1.8 in)
2023
79.0 mm (3.1 in)
2024
197.6 mm (7.8 in)
2025
89.9 mm (3.5 in)
2026
122.9 mm (4.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Healdsburg, 1893 to 2026. The record is 465.3 mm (18.3 in) in 2024, marked on the chart; the median year is 190.5 mm (7.5 in).
Wettest five days (Rx5day) at Healdsburg by year
Year
Wettest five days (Rx5day)
1893
143.6 mm (5.7 in)
1894
210.2 mm (8.3 in)
1895
330.5 mm (13.0 in)
1896
368.3 mm (14.5 in)
1897
101.1 mm (4.0 in)
1898
102.9 mm (4.1 in)
1899
242.6 mm (9.6 in)
1900
196.6 mm (7.7 in)
1901
156.2 mm (6.1 in)
1902
283.7 mm (11.2 in)
1903
275.8 mm (10.9 in)
1904
240.8 mm (9.5 in)
1905
101.8 mm (4.0 in)
1906
238.5 mm (9.4 in)
1907
334.2 mm (13.2 in)
1908
93.2 mm (3.7 in)
1909
205.1 mm (8.1 in)
1910
85.4 mm (3.4 in)
1911
148.1 mm (5.8 in)
1912
87.1 mm (3.4 in)
1913
191.2 mm (7.5 in)
1914
231.4 mm (9.1 in)
1915
213.6 mm (8.4 in)
1916
195.6 mm (7.7 in)
1917
212.1 mm (8.4 in)
1918
66.8 mm (2.6 in)
1919
138.7 mm (5.5 in)
1920
284.7 mm (11.2 in)
1921
168.9 mm (6.6 in)
1922
157.2 mm (6.2 in)
1923
81.7 mm (3.2 in)
1924
129.4 mm (5.1 in)
1925
182.9 mm (7.2 in)
1926
255.0 mm (10.0 in)
1927
178.6 mm (7.0 in)
1928
151.5 mm (6.0 in)
1929
303.0 mm (11.9 in)
1930
162.7 mm (6.4 in)
1931
226.7 mm (8.9 in)
1932
110.8 mm (4.4 in)
1933
162.4 mm (6.4 in)
1934
184.1 mm (7.2 in)
1935
146.0 mm (5.7 in)
1936
144.5 mm (5.7 in)
1937
235.5 mm (9.3 in)
1938
140.7 mm (5.5 in)
1939
86.9 mm (3.4 in)
1940
299.5 mm (11.8 in)
1941
155.4 mm (6.1 in)
1942
238.5 mm (9.4 in)
1943
261.8 mm (10.3 in)
1944
189.7 mm (7.5 in)
1945
186.4 mm (7.3 in)
1946
124.7 mm (4.9 in)
1947
128.8 mm (5.1 in)
1948
96.6 mm (3.8 in)
1949
145.3 mm (5.7 in)
1950
196.6 mm (7.7 in)
1951
225.1 mm (8.9 in)
1952
204.4 mm (8.0 in)
1953
171.3 mm (6.7 in)
1954
205.5 mm (8.1 in)
1955
327.7 mm (12.9 in)
1956
200.7 mm (7.9 in)
1957
165.3 mm (6.5 in)
1958
172.5 mm (6.8 in)
1959
303.3 mm (11.9 in)
1960
155.7 mm (6.1 in)
1961
146.3 mm (5.8 in)
1962
275.1 mm (10.8 in)
1963
285.5 mm (11.2 in)
1964
285.2 mm (11.2 in)
1965
209.0 mm (8.2 in)
1966
218.4 mm (8.6 in)
1967
261.2 mm (10.3 in)
1968
133.5 mm (5.3 in)
1969
256.8 mm (10.1 in)
1970
235.4 mm (9.3 in)
1971
105.3 mm (4.1 in)
1972
173.5 mm (6.8 in)
1973
249.5 mm (9.8 in)
1974
193.3 mm (7.6 in)
1975
197.1 mm (7.8 in)
1976
75.7 mm (3.0 in)
1977
192.5 mm (7.6 in)
1978
251.1 mm (9.9 in)
1979
183.8 mm (7.2 in)
1980
265.0 mm (10.4 in)
1981
202.2 mm (8.0 in)
1982
169.5 mm (6.7 in)
1983
280.2 mm (11.0 in)
1984
145.0 mm (5.7 in)
1985
133.3 mm (5.2 in)
1986
384.7 mm (15.1 in)
1987
144.0 mm (5.7 in)
1988
116.1 mm (4.6 in)
1989
110.9 mm (4.4 in)
1990
124.2 mm (4.9 in)
1991
283.4 mm (11.2 in)
1992
166.1 mm (6.5 in)
1993
179.1 mm (7.1 in)
1994
125.8 mm (5.0 in)
1995
356.0 mm (14.0 in)
1996
172.5 mm (6.8 in)
1997
232.4 mm (9.1 in)
1998
268.2 mm (10.6 in)
1999
179.4 mm (7.1 in)
2000
119.1 mm (4.7 in)
2001
193.9 mm (7.6 in)
2002
325.6 mm (12.8 in)
2003
140.2 mm (5.5 in)
2004
180.1 mm (7.1 in)
2005
229.1 mm (9.0 in)
2006
242.0 mm (9.5 in)
2007
185.3 mm (7.3 in)
2008
191.5 mm (7.5 in)
2009
131.3 mm (5.2 in)
2010
221.7 mm (8.7 in)
2011
134.1 mm (5.3 in)
2012
231.0 mm (9.1 in)
2017
68.6 mm (2.7 in)
2018
85.6 mm (3.4 in)
2019
314.5 mm (12.4 in)
2020
35.0 mm (1.4 in)
2021
271.7 mm (10.7 in)
2022
113.1 mm (4.5 in)
2023
240.1 mm (9.5 in)
2024
465.3 mm (18.3 in)
2025
221.7 mm (8.7 in)
2026
214.9 mm (8.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Healdsburg, 1893 to 2026. The record is 177 days in 2019, marked on the chart; the median year is 107 days.
Longest dry spell (CDD) at Healdsburg by year
Year
Longest dry spell (CDD)
1893
110 days
1894
59 days
1895
27 days
1896
35 days
1897
28 days
1898
38 days
1899
64 days
1900
40 days
1901
119 days
1902
122 days
1903
175 days
1904
92 days
1905
158 days
1906
98 days
1907
119 days
1908
48 days
1909
80 days
1910
111 days
1911
122 days
1912
62 days
1913
153 days
1914
87 days
1915
21 days
1916
29 days
1917
19 days
1918
21 days
1919
12 days
1920
23 days
1921
9 days
1922
1 day
1923
26 days
1924
62 days
1925
36 days
1926
146 days
1927
57 days
1928
148 days
1929
99 days
1930
31 days
1931
126 days
1932
143 days
1933
129 days
1934
108 days
1935
138 days
1936
112 days
1937
107 days
1938
149 days
1939
132 days
1940
95 days
1941
51 days
1942
100 days
1943
162 days
1944
117 days
1945
115 days
1946
59 days
1947
121 days
1948
101 days
1949
78 days
1950
115 days
1951
149 days
1952
110 days
1953
83 days
1954
39 days
1955
136 days
1956
91 days
1957
108 days
1958
86 days
1959
139 days
1960
133 days
1961
67 days
1962
92 days
1963
133 days
1964
140 days
1965
94 days
1966
84 days
1967
120 days
1968
85 days
1969
172 days
1970
130 days
1971
121 days
1972
107 days
1973
159 days
1974
90 days
1975
81 days
1976
124 days
1977
113 days
1978
112 days
1979
140 days
1980
72 days
1981
80 days
1982
79 days
1983
105 days
1984
84 days
1985
90 days
1986
132 days
1987
173 days
1988
85 days
1989
77 days
1990
115 days
1991
118 days
1992
93 days
1993
126 days
1994
139 days
1995
137 days
1996
149 days
1997
75 days
1998
119 days
1999
107 days
2000
53 days
2001
88 days
2002
169 days
2003
78 days
2004
112 days
2005
118 days
2006
134 days
2007
67 days
2008
163 days
2009
129 days
2010
142 days
2011
61 days
2012
120 days
2017
57 days
2018
36 days
2019
177 days
2020
87 days
2021
137 days
2022
104 days
2023
139 days
2024
131 days
2025
129 days
2026
95 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
87 years with a frost
Across 87 years with a frost, the median last spring frost at Healdsburg falls on 9 March and the median first autumn frost on 21 November, which leaves a median of 258 days between them.
In 1974 to 2024 the median growing season was 287 days. That is 57 days more than in 1900 to 1941.
Fitted over all years, the growing season changes by +8.7 days per decade at this station.
Frost dates and growing season at Healdsburg
Measure
Median, all years
Earliest period (1900 to 1941)
Recent period (1974 to 2024)
Recent against earliest
Fitted trend
Last spring frost
9 March
26 March
14 February
40 days earlier
-5.6 days per decade
First autumn frost
21 November
11 November
30 November
19 days later
+3.0 days per decade
Growing days
258 days
230 days
287 days
57 days more
+8.7 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.
Rainfall Return Levels
94 years, 1901 to 2025
A day with at least 92.0 mm (3.6 in) of rain is expected about once in 2 years. A day with at least 193.7 mm (7.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Healdsburg: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
92.0 mm (3.6 in)
5 years
122.3 mm (4.8 in)
10 years
141.1 mm (5.6 in)
25 years
163.4 mm (6.4 in)
50 years
179.0 mm (7.0 in)
100 years
193.7 mm (7.6 in)
Longer than the 94 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, 94 years of values from 1901 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: 207.8 mm (8.2 in) in 1980; 197.6 mm (7.8 in) in 2024; 166.6 mm (6.6 in) in 1977.
Station Changes
3 suspected
3 changes were suspected in the annual mean temperature of Healdsburg, at 1939, 1962 and 1985. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1939 ran 0.4 C (0.7 F) lower than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1962 ran 0.5 C (0.9 F) higher than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1985 ran 0.6 C (1.1 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Healdsburg, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1939
-0.4
-0.7
likely
5
1962
+0.5
+0.9
likely
5
1985
-0.6
-1.1
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 Healdsburg standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Healdsburg 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.