Record envelope, standing records and threshold days for Williams (USC00049677), California, United States, with 83 years of record.
Key Facts for Williams
Williams (USC00049677) is a weather station in California, United States at 39.15 latitude and -122.15 longitude, 26 m (85 ft) above sea level.
The station reports from 1906 to 1988, 83 years of record.
1,464 records set at Williams still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Williams set a daily record low maximum temperature of 13.3 C (55.9 F) on 14 October 1988.
About the Station
Location: California, United States, 39.15 latitude, -122.15 longitude.
Elevation: 26 m (85 ft).
Period of record: 1906 to 1988, 83 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 Williams. 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 Williams, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
28.3 C (82.9 F)
-5.6 C (21.9 F)
n/a
n/a
Feb
28.3 C (82.9 F)
-3.9 C (25.0 F)
n/a
n/a
Mar
31.1 C (88.0 F)
-2.8 C (27.0 F)
n/a
n/a
Apr
36.1 C (97.0 F)
-0.6 C (30.9 F)
n/a
n/a
May
38.9 C (102.0 F)
1.7 C (35.1 F)
n/a
n/a
Jun
44.4 C (111.9 F)
7.2 C (45.0 F)
n/a
n/a
Jul
45.0 C (113.0 F)
7.2 C (45.0 F)
n/a
n/a
Aug
46.1 C (115.0 F)
7.8 C (46.0 F)
n/a
n/a
Sep
42.8 C (109.0 F)
3.9 C (39.0 F)
n/a
n/a
Oct
37.8 C (100.0 F)
0.6 C (33.1 F)
n/a
n/a
Nov
32.8 C (91.0 F)
-5.0 C (23.0 F)
n/a
n/a
Dec
24.4 C (75.9 F)
-6.1 C (21.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Williams still stand. 1955 holds the most, with 70.
Standing records at Williams by the year they were set
Year set
Standing records
1952
12
1953
47
1954
48
1955
70
1956
46
1957
59
1958
58
1959
54
1960
56
1961
46
1962
50
1963
49
1964
38
1965
9
1966
27
1967
67
1968
35
1969
26
1970
36
1971
47
1972
58
1973
27
1974
26
1975
4
1976
45
1977
44
1978
50
1979
22
1980
24
1981
34
1982
34
1983
27
1984
34
1985
53
1986
33
1987
29
1988
40
Wettest Day of Each Month
Nov: 91.4 mm (3.6 in)
The wettest day on record for each calendar month at Williams. The most was 91.4 mm (3.6 in) on 28 November 1970.
Record daily precipitation for each month at Williams
Month
Record daily precipitation (mm)
Date
Jan
81.3 mm (3.2 in)
3 January 1916
Feb
56.9 mm (2.2 in)
19 February 1958
Mar
69.9 mm (2.8 in)
7 March 1911
Apr
37.6 mm (1.5 in)
27 April 1983
May
26.9 mm (1.1 in)
19 May 1916
Jun
21.6 mm (0.9 in)
2 June 1967
Jul
21.8 mm (0.9 in)
8 July 1974
Aug
20.3 mm (0.8 in)
21 August 1968
Sep
35.3 mm (1.4 in)
18 September 1959
Oct
57.9 mm (2.3 in)
12 October 1962
Nov
91.4 mm (3.6 in)
28 November 1970
Dec
91.4 mm (3.6 in)
28 December 1970
Period of Record Coverage
1952 to 1988
Complete yearUnder 90 percent of days
37 years of record at Williams, 1952 to 1988. 11 years have data for under 90 percent of days and are left out of rankings: 1952, 1953, 1964, 1965, 1968, 1973, 1975, 1979 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 22 complete years at Williams, 1954 to 1983. Blue stripes are years cooler than the station's own mean of 16.4 C (61.6 F); red stripes are warmer. The coolest year was 1963, at 15.7 C (60.2 F), and the warmest was 1959, at 17.4 C (63.3 F). The strongest colour marks a difference of 1.0 C (1.8 F).
Annual mean temperature at Williams as warming stripes, 1954 to 1983
Year
Annual mean temperature
Difference from the station mean
1954
15.9 C
-0.49 C
1955
16.0 C
-0.41 C
1956
16.1 C
-0.30 C
1958
17.3 C
+0.83 C
1959
17.4 C
+0.98 C
1960
16.6 C
+0.19 C
1961
16.3 C
-0.12 C
1962
16.1 C
-0.35 C
1963
15.7 C
-0.78 C
1966
16.5 C
+0.10 C
1967
17.0 C
+0.55 C
1969
16.3 C
-0.09 C
1970
16.7 C
+0.30 C
1971
15.7 C
-0.70 C
1974
16.1 C
-0.36 C
1976
16.4 C
-0.04 C
1977
16.6 C
+0.12 C
1978
16.8 C
+0.41 C
1980
16.2 C
-0.25 C
1981
17.3 C
+0.85 C
1982
15.8 C
-0.63 C
1983
16.7 C
+0.24 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1906 to 1988
Yearly extremes at Williams: 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)
1978
41.7 C (107.1 F)
37
Coldest night (TNn)
-6.1 C (21.0 F)
1956
-3.9 C (25.0 F)
37
Wettest day (Rx1day)
91.4 mm (3.6 in)
1970
38.0 mm (1.5 in)
50
Wettest five days (Rx5day)
139.9 mm (5.5 in)
1970
70.7 mm (2.8 in)
50
Longest dry spell (CDD)
164 days
1985
82 days
50
Hottest day (TXx)
The hottest day of the year at Williams, 1906 to 1988. The record is 46.1 C (115.0 F) in 1978, marked on the chart; the median year is 41.7 C (107.1 F).
Hottest day (TXx) at Williams by year
Year
Hottest day (TXx)
1906
n/a
1907
n/a
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
n/a
1914
n/a
1915
n/a
1916
n/a
1917
n/a
1918
n/a
1952
28.9 C (84.0 F)
1953
41.7 C (107.1 F)
1954
42.8 C (109.0 F)
1955
42.8 C (109.0 F)
1956
42.8 C (109.0 F)
1957
43.3 C (109.9 F)
1958
42.2 C (108.0 F)
1959
42.8 C (109.0 F)
1960
43.9 C (111.0 F)
1961
44.4 C (111.9 F)
1962
39.4 C (102.9 F)
1963
39.4 C (102.9 F)
1964
41.1 C (106.0 F)
1965
32.8 C (91.0 F)
1966
41.7 C (107.1 F)
1967
42.2 C (108.0 F)
1968
41.1 C (106.0 F)
1969
40.6 C (105.1 F)
1970
41.7 C (107.1 F)
1971
45.6 C (114.1 F)
1972
45.0 C (113.0 F)
1973
41.7 C (107.1 F)
1974
41.7 C (107.1 F)
1975
39.4 C (102.9 F)
1976
41.7 C (107.1 F)
1977
43.3 C (109.9 F)
1978
46.1 C (115.0 F)
1979
41.7 C (107.1 F)
1980
43.3 C (109.9 F)
1981
43.9 C (111.0 F)
1982
39.4 C (102.9 F)
1983
41.7 C (107.1 F)
1984
45.0 C (113.0 F)
1985
43.3 C (109.9 F)
1986
41.1 C (106.0 F)
1987
41.7 C (107.1 F)
1988
38.3 C (100.9 F)
Coldest night (TNn)
The coldest night of the year at Williams, 1906 to 1988. The record is -6.1 C (21.0 F) in 1956, marked on the chart; the median year is -3.9 C (25.0 F).
Coldest night (TNn) at Williams by year
Year
Coldest night (TNn)
1906
n/a
1907
n/a
1908
n/a
1909
n/a
1910
n/a
1911
n/a
1912
n/a
1913
n/a
1914
n/a
1915
n/a
1916
n/a
1917
n/a
1918
n/a
1952
-4.4 C (24.1 F)
1953
-1.7 C (28.9 F)
1954
-3.9 C (25.0 F)
1955
-3.9 C (25.0 F)
1956
-6.1 C (21.0 F)
1957
-5.6 C (21.9 F)
1958
-3.9 C (25.0 F)
1959
-4.4 C (24.1 F)
1960
-5.6 C (21.9 F)
1961
-3.3 C (26.1 F)
1962
-3.9 C (25.0 F)
1963
-5.0 C (23.0 F)
1964
-1.7 C (28.9 F)
1965
-1.7 C (28.9 F)
1966
-3.3 C (26.1 F)
1967
-5.6 C (21.9 F)
1968
-5.6 C (21.9 F)
1969
-2.8 C (27.0 F)
1970
-3.3 C (26.1 F)
1971
-3.3 C (26.1 F)
1972
-6.1 C (21.0 F)
1973
-5.6 C (21.9 F)
1974
-3.3 C (26.1 F)
1975
-2.8 C (27.0 F)
1976
-5.0 C (23.0 F)
1977
-3.3 C (26.1 F)
1978
-5.0 C (23.0 F)
1979
-3.9 C (25.0 F)
1980
-3.3 C (26.1 F)
1981
-0.6 C (30.9 F)
1982
-4.4 C (24.1 F)
1983
-5.0 C (23.0 F)
1984
-3.3 C (26.1 F)
1985
-5.0 C (23.0 F)
1986
0.0 C (32.0 F)
1987
-3.9 C (25.0 F)
1988
-3.9 C (25.0 F)
Wettest day (Rx1day)
The wettest day of the year at Williams, 1906 to 1988. The record is 91.4 mm (3.6 in) in 1970, marked on the chart; the median year is 38.0 mm (1.5 in).
Wettest day (Rx1day) at Williams by year
Year
Wettest day (Rx1day)
1906
47.0 mm (1.9 in)
1907
22.1 mm (0.9 in)
1908
24.1 mm (0.9 in)
1909
25.4 mm (1.0 in)
1910
35.1 mm (1.4 in)
1911
69.9 mm (2.8 in)
1912
26.9 mm (1.1 in)
1913
54.6 mm (2.1 in)
1914
33.0 mm (1.3 in)
1915
48.3 mm (1.9 in)
1916
81.3 mm (3.2 in)
1917
22.1 mm (0.9 in)
1918
25.4 mm (1.0 in)
1952
58.2 mm (2.3 in)
1953
40.9 mm (1.6 in)
1954
42.7 mm (1.7 in)
1955
60.5 mm (2.4 in)
1956
28.7 mm (1.1 in)
1957
47.2 mm (1.9 in)
1958
56.9 mm (2.2 in)
1959
35.8 mm (1.4 in)
1960
33.3 mm (1.3 in)
1961
50.0 mm (2.0 in)
1962
57.9 mm (2.3 in)
1963
35.6 mm (1.4 in)
1964
38.1 mm (1.5 in)
1965
27.7 mm (1.1 in)
1966
54.1 mm (2.1 in)
1967
55.9 mm (2.2 in)
1968
40.6 mm (1.6 in)
1969
39.1 mm (1.5 in)
1970
91.4 mm (3.6 in)
1971
24.1 mm (0.9 in)
1972
30.5 mm (1.2 in)
1973
53.8 mm (2.1 in)
1974
38.1 mm (1.5 in)
1975
10.7 mm (0.4 in)
1976
17.3 mm (0.7 in)
1977
31.2 mm (1.2 in)
1978
46.2 mm (1.8 in)
1979
34.5 mm (1.4 in)
1980
30.7 mm (1.2 in)
1981
45.2 mm (1.8 in)
1982
37.8 mm (1.5 in)
1983
46.2 mm (1.8 in)
1984
31.2 mm (1.2 in)
1985
29.0 mm (1.1 in)
1986
48.5 mm (1.9 in)
1987
22.9 mm (0.9 in)
1988
14.0 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Williams, 1906 to 1988. The record is 139.9 mm (5.5 in) in 1970, marked on the chart; the median year is 70.7 mm (2.8 in).
Wettest five days (Rx5day) at Williams by year
Year
Wettest five days (Rx5day)
1906
66.1 mm (2.6 in)
1907
53.9 mm (2.1 in)
1908
60.9 mm (2.4 in)
1909
53.8 mm (2.1 in)
1910
28.2 mm (1.1 in)
1911
97.8 mm (3.9 in)
1912
54.6 mm (2.1 in)
1913
95.2 mm (3.7 in)
1914
97.9 mm (3.9 in)
1915
85.1 mm (3.4 in)
1916
41.4 mm (1.6 in)
1917
37.6 mm (1.5 in)
1918
75.2 mm (3.0 in)
1952
70.9 mm (2.8 in)
1953
70.4 mm (2.8 in)
1954
63.1 mm (2.5 in)
1955
113.4 mm (4.5 in)
1956
51.6 mm (2.0 in)
1957
80.8 mm (3.2 in)
1958
76.8 mm (3.0 in)
1959
87.7 mm (3.5 in)
1960
41.9 mm (1.6 in)
1961
88.8 mm (3.5 in)
1962
128.8 mm (5.1 in)
1963
82.9 mm (3.3 in)
1964
52.6 mm (2.1 in)
1965
67.1 mm (2.6 in)
1966
65.6 mm (2.6 in)
1967
102.1 mm (4.0 in)
1968
85.6 mm (3.4 in)
1969
77.4 mm (3.0 in)
1970
139.9 mm (5.5 in)
1971
92.9 mm (3.7 in)
1972
76.7 mm (3.0 in)
1973
100.1 mm (3.9 in)
1974
66.3 mm (2.6 in)
1975
29.5 mm (1.2 in)
1976
19.8 mm (0.8 in)
1977
55.1 mm (2.2 in)
1978
130.2 mm (5.1 in)
1979
76.2 mm (3.0 in)
1980
113.2 mm (4.5 in)
1981
57.2 mm (2.3 in)
1982
61.5 mm (2.4 in)
1983
138.6 mm (5.5 in)
1984
62.7 mm (2.5 in)
1985
56.4 mm (2.2 in)
1986
116.3 mm (4.6 in)
1987
34.0 mm (1.3 in)
1988
24.7 mm (1.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Williams, 1906 to 1988. The record is 164 days in 1985, marked on the chart; the median year is 82 days.
Longest dry spell (CDD) at Williams by year
Year
Longest dry spell (CDD)
1906
23 days
1907
24 days
1908
26 days
1909
26 days
1910
36 days
1911
26 days
1912
46 days
1913
39 days
1914
38 days
1915
20 days
1916
45 days
1917
33 days
1918
21 days
1952
25 days
1953
83 days
1954
78 days
1955
136 days
1956
89 days
1957
128 days
1958
102 days
1959
144 days
1960
132 days
1961
68 days
1962
149 days
1963
152 days
1964
55 days
1965
21 days
1966
53 days
1967
96 days
1968
140 days
1969
121 days
1970
110 days
1971
140 days
1972
107 days
1973
129 days
1974
111 days
1975
54 days
1976
68 days
1977
116 days
1978
137 days
1979
117 days
1980
100 days
1981
128 days
1982
78 days
1983
81 days
1984
90 days
1985
164 days
1986
84 days
1987
42 days
1988
59 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
20 years with a frost
Across 20 years with a frost, the median last spring frost at Williams falls on 11 March and the median first autumn frost on 27 November, which leaves a median of 269 days between them.
Frost dates and growing season at Williams
Measure
Median, all years
Earliest period
Recent period (1954 to 1983)
Recent against earliest
Fitted trend
Last spring frost
11 March
n/a
11 March
n/a
n/a
First autumn frost
27 November
n/a
27 November
n/a
n/a
Growing days
269 days
n/a
269 days
n/a
n/a
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.
Download the Data
Data for Williams standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Williams 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.