Record envelope, standing records and threshold days for Westwood (USC00049599), California, United States, with 33 years of record.
Key Facts for Westwood
Westwood (USC00049599) is a weather station in California, United States at 40.30 latitude and -121.00 longitude, 1,546 m (5,072 ft) above sea level.
The station reports from 1921 to 1953, 33 years of record.
1,464 records set at Westwood still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Westwood set a daily record low minimum temperature of -11.1 C (12.0 F) on 12 April 1953.
About the Station
Location: California, United States, 40.30 latitude, -121.00 longitude.
Elevation: 1,546 m (5,072 ft).
Period of record: 1921 to 1953, 33 years.
Eligible elements: tmax, tmin, prcp.
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 Westwood. 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 Westwood, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
16.7 C (62.1 F)
-29.4 C (-20.9 F)
n/a
n/a
Feb
17.8 C (64.0 F)
-29.4 C (-20.9 F)
n/a
n/a
Mar
22.8 C (73.0 F)
-25.0 C (-13.0 F)
n/a
n/a
Apr
28.3 C (82.9 F)
-16.7 C (1.9 F)
n/a
n/a
May
30.6 C (87.1 F)
-10.0 C (14.0 F)
n/a
n/a
Jun
37.8 C (100.0 F)
-5.6 C (21.9 F)
n/a
n/a
Jul
37.8 C (100.0 F)
-1.1 C (30.0 F)
n/a
n/a
Aug
37.2 C (99.0 F)
-2.8 C (27.0 F)
n/a
n/a
Sep
35.6 C (96.1 F)
-11.1 C (12.0 F)
n/a
n/a
Oct
30.0 C (86.0 F)
-11.7 C (10.9 F)
n/a
n/a
Nov
25.6 C (78.1 F)
-18.9 C (-2.0 F)
n/a
n/a
Dec
20.6 C (69.1 F)
-25.0 C (-13.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Westwood still stand. 1949 holds the most, with 80.
Standing records at Westwood by the year they were set
Year set
Standing records
1921
43
1922
73
1923
45
1924
67
1925
57
1926
44
1927
47
1928
41
1929
50
1930
33
1931
44
1932
55
1933
75
1934
39
1935
26
1936
45
1937
34
1938
22
1939
25
1940
30
1941
60
1942
36
1943
37
1944
20
1945
35
1946
29
1947
20
1948
56
1949
80
1950
73
1951
70
1952
48
1953
5
All-Time Record Progression
1 new records
1 all-time records were set at Westwood between 7 January 1952 and 7 January 1952. Each dot is a new record.
When Westwood set new all-time records
Date
Kind
Detail
1952-01-07
Record low maximum temperature
Record low maximum temperature -14.4 C (6.1 F)
Wettest Day of Each Month
Nov: 88.9 mm (3.5 in)
The wettest day on record for each calendar month at Westwood. The most was 88.9 mm (3.5 in) on 28 November 1945.
Record daily precipitation for each month at Westwood
Month
Record daily precipitation (mm)
Date
Jan
63.2 mm (2.5 in)
21 January 1943
Feb
69.1 mm (2.7 in)
10 February 1922
Mar
62.7 mm (2.5 in)
15 March 1952
Apr
50.8 mm (2.0 in)
7 April 1935
May
26.9 mm (1.1 in)
13 May 1941
Jun
35.6 mm (1.4 in)
16 June 1937
Jul
26.2 mm (1.0 in)
29 July 1952
Aug
21.3 mm (0.8 in)
29 August 1923
Sep
30.7 mm (1.2 in)
19 September 1925
Oct
50.3 mm (2.0 in)
11 October 1945
Nov
88.9 mm (3.5 in)
28 November 1945
Dec
86.4 mm (3.4 in)
3 December 1941
Period of Record Coverage
1921 to 1953
Complete yearUnder 90 percent of days
33 years of record at Westwood, 1921 to 1953. 27 years have data for under 90 percent of days and are left out of rankings: 1924, 1925, 1926, 1927, 1928, 1929, 1930, 1931 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 11 complete years at Westwood, 1922 to 1951. Blue stripes are years cooler than the station's own mean of 7.5 C (45.5 F); red stripes are warmer. The coolest year was 1922, at 5.9 C (42.6 F), and the warmest was 1926, at 8.8 C (47.8 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Westwood as warming stripes, 1922 to 1951
Year
Annual mean temperature
Difference from the station mean
1922
5.9 C
-1.60 C
1925
7.8 C
+0.26 C
1926
8.8 C
+1.26 C
1927
7.4 C
-0.12 C
1928
8.2 C
+0.70 C
1929
8.1 C
+0.61 C
1930
7.8 C
+0.31 C
1931
8.2 C
+0.67 C
1932
6.9 C
-0.59 C
1950
7.4 C
-0.14 C
1951
6.2 C
-1.35 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
1921 to 1953
Yearly extremes at Westwood: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
37.8 C (100.0 F)
1924
35.0 C (95.0 F)
33
Coldest night (TNn)
-29.4 C (-20.9 F)
1949
-19.4 C (-2.9 F)
33
Wettest day (Rx1day)
88.9 mm (3.5 in)
1945
53.1 mm (2.1 in)
33
Wettest five days (Rx5day)
206.5 mm (8.1 in)
1929
105.0 mm (4.1 in)
33
Longest dry spell (CDD)
132 days
1942
59 days
33
Hottest day (TXx)
The hottest day of the year at Westwood, 1921 to 1953. The record is 37.8 C (100.0 F) in 1924, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Westwood by year
Year
Hottest day (TXx)
1921
33.9 C (93.0 F)
1922
35.0 C (95.0 F)
1923
35.0 C (95.0 F)
1924
37.8 C (100.0 F)
1925
35.6 C (96.1 F)
1926
36.1 C (97.0 F)
1927
33.3 C (91.9 F)
1928
36.7 C (98.1 F)
1929
37.2 C (99.0 F)
1930
35.0 C (95.0 F)
1931
37.8 C (100.0 F)
1932
35.0 C (95.0 F)
1933
36.7 C (98.1 F)
1934
35.6 C (96.1 F)
1935
35.6 C (96.1 F)
1936
35.6 C (96.1 F)
1937
35.0 C (95.0 F)
1938
35.0 C (95.0 F)
1939
35.0 C (95.0 F)
1940
36.1 C (97.0 F)
1941
34.4 C (93.9 F)
1942
36.7 C (98.1 F)
1943
34.4 C (93.9 F)
1944
34.4 C (93.9 F)
1945
36.1 C (97.0 F)
1946
37.8 C (100.0 F)
1947
32.2 C (90.0 F)
1948
32.2 C (90.0 F)
1949
32.8 C (91.0 F)
1950
35.6 C (96.1 F)
1951
32.8 C (91.0 F)
1952
36.7 C (98.1 F)
1953
20.0 C (68.0 F)
Coldest night (TNn)
The coldest night of the year at Westwood, 1921 to 1953. The record is -29.4 C (-20.9 F) in 1949, marked on the chart; the median year is -19.4 C (-2.9 F).
Coldest night (TNn) at Westwood by year
Year
Coldest night (TNn)
1921
-18.9 C (-2.0 F)
1922
-26.7 C (-16.1 F)
1923
-27.2 C (-17.0 F)
1924
-25.0 C (-13.0 F)
1925
-16.7 C (1.9 F)
1926
-15.6 C (3.9 F)
1927
-17.8 C (0.0 F)
1928
-17.2 C (1.0 F)
1929
-19.4 C (-2.9 F)
1930
-20.6 C (-5.1 F)
1931
-20.0 C (-4.0 F)
1932
-23.9 C (-11.0 F)
1933
-24.4 C (-11.9 F)
1934
-12.8 C (9.0 F)
1935
-23.3 C (-9.9 F)
1936
-16.7 C (1.9 F)
1937
-25.6 C (-14.1 F)
1938
-23.3 C (-9.9 F)
1939
-22.2 C (-8.0 F)
1940
-15.0 C (5.0 F)
1941
-12.2 C (10.0 F)
1942
-15.0 C (5.0 F)
1943
-16.1 C (3.0 F)
1944
-18.3 C (-0.9 F)
1945
-17.2 C (1.0 F)
1946
-16.1 C (3.0 F)
1947
-16.7 C (1.9 F)
1948
-21.7 C (-7.1 F)
1949
-29.4 C (-20.9 F)
1950
-26.1 C (-15.0 F)
1951
-22.8 C (-9.0 F)
1952
-25.6 C (-14.1 F)
1953
-15.6 C (3.9 F)
Wettest day (Rx1day)
The wettest day of the year at Westwood, 1921 to 1953. The record is 88.9 mm (3.5 in) in 1945, marked on the chart; the median year is 53.1 mm (2.1 in).
Wettest day (Rx1day) at Westwood by year
Year
Wettest day (Rx1day)
1921
57.2 mm (2.3 in)
1922
69.1 mm (2.7 in)
1923
33.3 mm (1.3 in)
1924
44.7 mm (1.8 in)
1925
42.7 mm (1.7 in)
1926
69.3 mm (2.7 in)
1927
53.3 mm (2.1 in)
1928
53.3 mm (2.1 in)
1929
56.4 mm (2.2 in)
1930
27.7 mm (1.1 in)
1931
45.5 mm (1.8 in)
1932
34.8 mm (1.4 in)
1933
35.6 mm (1.4 in)
1934
59.7 mm (2.4 in)
1935
50.8 mm (2.0 in)
1936
39.4 mm (1.6 in)
1937
85.3 mm (3.4 in)
1938
53.1 mm (2.1 in)
1939
25.4 mm (1.0 in)
1940
63.2 mm (2.5 in)
1941
86.4 mm (3.4 in)
1942
35.6 mm (1.4 in)
1943
63.2 mm (2.5 in)
1944
39.6 mm (1.6 in)
1945
88.9 mm (3.5 in)
1946
72.4 mm (2.9 in)
1947
58.4 mm (2.3 in)
1948
23.6 mm (0.9 in)
1949
25.4 mm (1.0 in)
1950
41.1 mm (1.6 in)
1951
76.2 mm (3.0 in)
1952
62.7 mm (2.5 in)
1953
50.3 mm (2.0 in)
Wettest five days (Rx5day)
The wettest five days of the year at Westwood, 1921 to 1953. The record is 206.5 mm (8.1 in) in 1929, marked on the chart; the median year is 105.0 mm (4.1 in).
Wettest five days (Rx5day) at Westwood by year
Year
Wettest five days (Rx5day)
1921
96.5 mm (3.8 in)
1922
148.6 mm (5.9 in)
1923
50.1 mm (2.0 in)
1924
58.2 mm (2.3 in)
1925
105.5 mm (4.2 in)
1926
168.6 mm (6.6 in)
1927
111.0 mm (4.4 in)
1928
153.7 mm (6.1 in)
1929
206.5 mm (8.1 in)
1930
57.0 mm (2.2 in)
1931
120.7 mm (4.8 in)
1932
57.7 mm (2.3 in)
1933
105.6 mm (4.2 in)
1934
95.8 mm (3.8 in)
1935
94.5 mm (3.7 in)
1936
104.4 mm (4.1 in)
1937
156.2 mm (6.1 in)
1938
105.0 mm (4.1 in)
1939
58.2 mm (2.3 in)
1940
161.8 mm (6.4 in)
1941
103.4 mm (4.1 in)
1942
110.2 mm (4.3 in)
1943
131.1 mm (5.2 in)
1944
77.7 mm (3.1 in)
1945
88.5 mm (3.5 in)
1946
87.9 mm (3.5 in)
1947
74.9 mm (2.9 in)
1948
34.2 mm (1.3 in)
1949
50.8 mm (2.0 in)
1950
117.3 mm (4.6 in)
1951
106.7 mm (4.2 in)
1952
112.0 mm (4.4 in)
1953
115.9 mm (4.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Westwood, 1921 to 1953. The record is 132 days in 1942, marked on the chart; the median year is 59 days.
Longest dry spell (CDD) at Westwood by year
Year
Longest dry spell (CDD)
1921
48 days
1922
63 days
1923
50 days
1924
17 days
1925
24 days
1926
59 days
1927
62 days
1928
93 days
1929
67 days
1930
101 days
1931
60 days
1932
90 days
1933
47 days
1934
35 days
1935
106 days
1936
100 days
1937
85 days
1938
62 days
1939
44 days
1940
85 days
1941
29 days
1942
132 days
1943
72 days
1944
34 days
1945
74 days
1946
56 days
1947
59 days
1948
89 days
1949
54 days
1950
41 days
1951
59 days
1952
22 days
1953
19 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.
Download the Data
Data for Westwood standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Westwood 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.