Record envelope, standing records and threshold days for Las Plumas (USC00044812), California, United States, with 55 years of record.
Key Facts for Las Plumas
Las Plumas (USC00044812) is a weather station in California, United States at 39.68 latitude and -121.48 longitude, 156 m (512 ft) above sea level.
The station reports from 1913 to 1967, 55 years of record.
1,464 records set at Las Plumas still stand.
Records are tracked for tmax, tmin, prcp: an element needs 30 years of data to be eligible.
Las Plumas tied a daily record high minimum temperature of 21.7 C (71.1 F) on 28 September 1967.
About the Station
Location: California, United States, 39.68 latitude, -121.48 longitude.
Elevation: 156 m (512 ft).
Period of record: 1913 to 1967, 55 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 Las Plumas. 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 Las Plumas, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
25.0 C (77.0 F)
-7.2 C (19.0 F)
n/a
n/a
Feb
30.0 C (86.0 F)
-5.0 C (23.0 F)
n/a
n/a
Mar
31.1 C (88.0 F)
-1.7 C (28.9 F)
n/a
n/a
Apr
36.1 C (97.0 F)
-1.7 C (28.9 F)
n/a
n/a
May
40.6 C (105.1 F)
0.0 C (32.0 F)
n/a
n/a
Jun
45.0 C (113.0 F)
5.6 C (42.1 F)
n/a
n/a
Jul
46.7 C (116.1 F)
10.0 C (50.0 F)
n/a
n/a
Aug
47.8 C (118.0 F)
9.4 C (48.9 F)
n/a
n/a
Sep
44.4 C (111.9 F)
5.0 C (41.0 F)
n/a
n/a
Oct
40.6 C (105.1 F)
1.1 C (34.0 F)
n/a
n/a
Nov
32.2 C (90.0 F)
-2.8 C (27.0 F)
n/a
n/a
Dec
24.4 C (75.9 F)
-6.7 C (19.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Las Plumas still stand. 1929 holds the most, with 55.
Standing records at Las Plumas by the year they were set
Year set
Standing records
1913
5
1914
6
1915
22
1916
45
1917
47
1918
47
1919
39
1920
32
1921
29
1922
31
1923
32
1924
38
1925
30
1926
28
1927
30
1928
24
1929
55
1930
42
1931
31
1932
35
1933
46
1934
36
1935
25
1936
53
1937
25
1938
23
1939
46
1940
22
1941
13
1942
18
1943
21
1944
27
1945
15
1946
12
1947
25
1948
39
1949
32
1950
42
1951
19
1952
12
1953
22
1954
14
1955
25
1956
15
1957
14
1958
19
1959
22
1960
14
1961
24
1962
18
1963
17
1964
21
1965
7
1966
11
1967
22
All-Time Record Progression
1 new records
1 all-time records were set at Las Plumas between 12 October 1962 and 12 October 1962. Each dot is a new record.
When Las Plumas set new all-time records
Date
Kind
Detail
1962-10-12
Record daily precipitation
Record daily precipitation 239.0 mm (9.4 in)
Wettest Day of Each Month
Oct: 239.0 mm (9.4 in)
The wettest day on record for each calendar month at Las Plumas. The most was 239.0 mm (9.4 in) on 12 October 1962.
Record daily precipitation for each month at Las Plumas
Month
Record daily precipitation (mm)
Date
Jan
162.1 mm (6.4 in)
21 January 1943
Feb
194.6 mm (7.7 in)
27 February 1940
Mar
129.8 mm (5.1 in)
30 March 1940
Apr
132.3 mm (5.2 in)
4 April 1926
May
107.7 mm (4.2 in)
18 May 1957
Jun
64.3 mm (2.5 in)
16 June 1937
Jul
7.1 mm (0.28 in)
1 July 1916
Aug
35.6 mm (1.4 in)
11 August 1965
Sep
119.9 mm (4.7 in)
27 September 1957
Oct
239.0 mm (9.4 in)
12 October 1962
Nov
107.2 mm (4.2 in)
20 November 1920
Dec
191.5 mm (7.5 in)
10 December 1937
Period of Record Coverage
1913 to 1967
Complete yearUnder 90 percent of days
55 years of record at Las Plumas, 1913 to 1967. 4 years have data for under 90 percent of days and are left out of rankings: 1913, 1914, 1966, 1967.
Cooler than the station meanWarmer than the station mean
One stripe for each of 49 complete years at Las Plumas, 1915 to 1965. Blue stripes are years cooler than the station's own mean of 17.6 C (63.7 F); red stripes are warmer. The coolest year was 1929, at 15.8 C (60.4 F), and the warmest was 1934, at 19.4 C (66.8 F). The strongest colour marks a difference of 1.9 C (3.4 F).
Annual mean temperature at Las Plumas as warming stripes, 1915 to 1965
Year
Annual mean temperature
Difference from the station mean
1915
17.7 C
+0.04 C
1916
16.5 C
-1.11 C
1917
17.5 C
-0.14 C
1918
18.3 C
+0.64 C
1919
17.2 C
-0.45 C
1920
16.4 C
-1.18 C
1921
16.9 C
-0.75 C
1922
16.9 C
-0.69 C
1923
17.4 C
-0.17 C
1924
18.7 C
+1.04 C
1925
16.7 C
-0.89 C
1926
18.2 C
+0.60 C
1927
16.8 C
-0.86 C
1928
16.6 C
-1.03 C
1929
15.8 C
-1.82 C
1930
16.5 C
-1.16 C
1931
18.2 C
+0.58 C
1932
18.2 C
+0.59 C
1933
18.1 C
+0.47 C
1934
19.4 C
+1.74 C
1935
17.7 C
+0.11 C
1936
18.8 C
+1.19 C
1937
18.0 C
+0.38 C
1938
18.2 C
+0.54 C
1939
19.2 C
+1.54 C
1940
18.8 C
+1.16 C
1941
18.0 C
+0.34 C
1942
17.6 C
-0.03 C
1943
17.9 C
+0.28 C
1944
17.5 C
-0.11 C
1945
17.7 C
+0.13 C
1946
17.1 C
-0.52 C
1947
17.5 C
-0.10 C
1948
16.5 C
-1.08 C
1950
18.0 C
+0.43 C
1951
17.7 C
+0.11 C
1952
17.7 C
+0.05 C
1953
17.5 C
-0.11 C
1954
17.3 C
-0.27 C
1955
17.3 C
-0.34 C
1956
17.4 C
-0.17 C
1957
17.3 C
-0.29 C
1958
18.7 C
+1.06 C
1959
18.9 C
+1.25 C
1960
17.9 C
+0.30 C
1961
17.7 C
+0.07 C
1962
17.5 C
-0.14 C
1964
17.3 C
-0.31 C
1965
16.9 C
-0.71 C
The fitted trend in annual mean temperature here over 1915 to 1965 is 0.1 C (-0.1 to 0.2) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.4) per decade. The slope is a straight line fitted to 49 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Las Plumas
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 0.4) per decade
1915 to 1965
49
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.3 to 0.1) per decade
-0.1 F (-0.5 to 0.2) per decade
1915 to 1965
49
Not clearly different from zero
Mean daily minimum
0.2 C (0.1 to 0.4) per decade
0.4 F (0.1 to 0.7) per decade
1915 to 1965
49
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
1913 to 1967
Yearly extremes at Las Plumas: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
47.8 C (118.0 F)
1933
42.8 C (109.0 F)
55
Coldest night (TNn)
-7.2 C (19.0 F)
1922
-2.2 C (28.0 F)
55
Wettest day (Rx1day)
239.0 mm (9.4 in)
1962
97.8 mm (3.9 in)
55
Wettest five days (Rx5day)
570.4 mm (22.5 in)
1962
219.6 mm (8.6 in)
55
Longest dry spell (CDD)
162 days
1928
84 days
55
Hottest day (TXx)
The hottest day of the year at Las Plumas, 1913 to 1967. The record is 47.8 C (118.0 F) in 1933, marked on the chart; the median year is 42.8 C (109.0 F).
Hottest day (TXx) at Las Plumas by year
Year
Hottest day (TXx)
1913
23.9 C (75.0 F)
1914
41.7 C (107.1 F)
1915
44.4 C (111.9 F)
1916
42.2 C (108.0 F)
1917
45.0 C (113.0 F)
1918
44.4 C (111.9 F)
1919
43.3 C (109.9 F)
1920
45.0 C (113.0 F)
1921
42.2 C (108.0 F)
1922
43.9 C (111.0 F)
1923
45.0 C (113.0 F)
1924
43.3 C (109.9 F)
1925
46.7 C (116.1 F)
1926
43.9 C (111.0 F)
1927
42.2 C (108.0 F)
1928
41.1 C (106.0 F)
1929
41.7 C (107.1 F)
1930
41.1 C (106.0 F)
1931
45.0 C (113.0 F)
1932
42.8 C (109.0 F)
1933
47.8 C (118.0 F)
1934
45.6 C (114.1 F)
1935
44.4 C (111.9 F)
1936
44.4 C (111.9 F)
1937
44.4 C (111.9 F)
1938
46.7 C (116.1 F)
1939
44.4 C (111.9 F)
1940
44.4 C (111.9 F)
1941
44.4 C (111.9 F)
1942
45.6 C (114.1 F)
1943
42.2 C (108.0 F)
1944
42.8 C (109.0 F)
1945
42.2 C (108.0 F)
1946
41.7 C (107.1 F)
1947
40.6 C (105.1 F)
1948
41.7 C (107.1 F)
1949
41.7 C (107.1 F)
1950
44.4 C (111.9 F)
1951
41.1 C (106.0 F)
1952
43.3 C (109.9 F)
1953
42.8 C (109.0 F)
1954
41.1 C (106.0 F)
1955
43.3 C (109.9 F)
1956
42.2 C (108.0 F)
1957
41.7 C (107.1 F)
1958
41.7 C (107.1 F)
1959
43.9 C (111.0 F)
1960
43.9 C (111.0 F)
1961
45.0 C (113.0 F)
1962
40.0 C (104.0 F)
1963
39.4 C (102.9 F)
1964
41.1 C (106.0 F)
1965
38.9 C (102.0 F)
1966
42.2 C (108.0 F)
1967
41.1 C (106.0 F)
Coldest night (TNn)
The coldest night of the year at Las Plumas, 1913 to 1967. The record is -7.2 C (19.0 F) in 1922, marked on the chart; the median year is -2.2 C (28.0 F).
Coldest night (TNn) at Las Plumas by year
Year
Coldest night (TNn)
1913
2.2 C (36.0 F)
1914
0.0 C (32.0 F)
1915
-1.1 C (30.0 F)
1916
-2.2 C (28.0 F)
1917
-3.3 C (26.1 F)
1918
-2.2 C (28.0 F)
1919
-2.2 C (28.0 F)
1920
-1.1 C (30.0 F)
1921
-2.2 C (28.0 F)
1922
-7.2 C (19.0 F)
1923
-3.3 C (26.1 F)
1924
-2.2 C (28.0 F)
1925
-1.1 C (30.0 F)
1926
-2.8 C (27.0 F)
1927
-1.1 C (30.0 F)
1928
-3.9 C (25.0 F)
1929
-5.0 C (23.0 F)
1930
-4.4 C (24.1 F)
1931
-2.8 C (27.0 F)
1932
-6.7 C (19.9 F)
1933
-2.2 C (28.0 F)
1934
-1.1 C (30.0 F)
1935
-1.7 C (28.9 F)
1936
-0.6 C (30.9 F)
1937
-6.7 C (19.9 F)
1938
-2.2 C (28.0 F)
1939
-1.7 C (28.9 F)
1940
-0.6 C (30.9 F)
1941
0.6 C (33.1 F)
1942
-1.7 C (28.9 F)
1943
-3.3 C (26.1 F)
1944
-0.6 C (30.9 F)
1945
-1.1 C (30.0 F)
1946
-1.1 C (30.0 F)
1947
-3.3 C (26.1 F)
1948
-3.3 C (26.1 F)
1949
-5.0 C (23.0 F)
1950
-3.3 C (26.1 F)
1951
-0.6 C (30.9 F)
1952
-0.6 C (30.9 F)
1953
-0.6 C (30.9 F)
1954
-2.2 C (28.0 F)
1955
-1.1 C (30.0 F)
1956
-2.2 C (28.0 F)
1957
-4.4 C (24.1 F)
1958
-1.1 C (30.0 F)
1959
-1.1 C (30.0 F)
1960
-2.2 C (28.0 F)
1961
-2.2 C (28.0 F)
1962
-3.3 C (26.1 F)
1963
-4.4 C (24.1 F)
1964
-0.6 C (30.9 F)
1965
-1.7 C (28.9 F)
1966
-1.1 C (30.0 F)
1967
-1.7 C (28.9 F)
Wettest day (Rx1day)
The wettest day of the year at Las Plumas, 1913 to 1967. The record is 239.0 mm (9.4 in) in 1962, marked on the chart; the median year is 97.8 mm (3.9 in).
Wettest day (Rx1day) at Las Plumas by year
Year
Wettest day (Rx1day)
1913
127.0 mm (5.0 in)
1914
44.5 mm (1.8 in)
1915
129.5 mm (5.1 in)
1916
125.5 mm (4.9 in)
1917
96.5 mm (3.8 in)
1918
68.6 mm (2.7 in)
1919
96.5 mm (3.8 in)
1920
107.2 mm (4.2 in)
1921
76.2 mm (3.0 in)
1922
116.1 mm (4.6 in)
1923
61.5 mm (2.4 in)
1924
101.6 mm (4.0 in)
1925
97.3 mm (3.8 in)
1926
132.3 mm (5.2 in)
1927
80.3 mm (3.2 in)
1928
76.2 mm (3.0 in)
1929
123.2 mm (4.9 in)
1930
57.7 mm (2.3 in)
1931
97.8 mm (3.9 in)
1932
57.2 mm (2.3 in)
1933
77.7 mm (3.1 in)
1934
63.5 mm (2.5 in)
1935
114.3 mm (4.5 in)
1936
98.0 mm (3.9 in)
1937
191.5 mm (7.5 in)
1938
85.1 mm (3.4 in)
1939
81.8 mm (3.2 in)
1940
194.6 mm (7.7 in)
1941
116.8 mm (4.6 in)
1942
114.3 mm (4.5 in)
1943
162.1 mm (6.4 in)
1944
88.9 mm (3.5 in)
1945
92.7 mm (3.6 in)
1946
61.5 mm (2.4 in)
1947
113.8 mm (4.5 in)
1948
64.3 mm (2.5 in)
1949
70.4 mm (2.8 in)
1950
144.8 mm (5.7 in)
1951
95.3 mm (3.8 in)
1952
104.1 mm (4.1 in)
1953
115.8 mm (4.6 in)
1954
109.2 mm (4.3 in)
1955
189.2 mm (7.4 in)
1956
125.5 mm (4.9 in)
1957
119.9 mm (4.7 in)
1958
89.7 mm (3.5 in)
1959
77.5 mm (3.1 in)
1960
66.8 mm (2.6 in)
1961
79.5 mm (3.1 in)
1962
239.0 mm (9.4 in)
1963
133.9 mm (5.3 in)
1964
156.2 mm (6.1 in)
1965
88.9 mm (3.5 in)
1966
87.4 mm (3.4 in)
1967
134.9 mm (5.3 in)
Wettest five days (Rx5day)
The wettest five days of the year at Las Plumas, 1913 to 1967. The record is 570.4 mm (22.5 in) in 1962, marked on the chart; the median year is 219.6 mm (8.6 in).
Wettest five days (Rx5day) at Las Plumas by year
Year
Wettest five days (Rx5day)
1913
233.1 mm (9.2 in)
1914
108.0 mm (4.3 in)
1915
198.4 mm (7.8 in)
1916
197.0 mm (7.8 in)
1917
257.3 mm (10.1 in)
1918
99.8 mm (3.9 in)
1919
193.0 mm (7.6 in)
1920
238.0 mm (9.4 in)
1921
215.9 mm (8.5 in)
1922
174.0 mm (6.9 in)
1923
111.8 mm (4.4 in)
1924
175.0 mm (6.9 in)
1925
213.4 mm (8.4 in)
1926
269.5 mm (10.6 in)
1927
202.4 mm (8.0 in)
1928
247.9 mm (9.8 in)
1929
324.6 mm (12.8 in)
1930
107.2 mm (4.2 in)
1931
262.7 mm (10.3 in)
1932
148.7 mm (5.9 in)
1933
144.7 mm (5.7 in)
1934
190.9 mm (7.5 in)
1935
155.7 mm (6.1 in)
1936
239.8 mm (9.4 in)
1937
327.9 mm (12.9 in)
1938
231.2 mm (9.1 in)
1939
130.8 mm (5.1 in)
1940
383.6 mm (15.1 in)
1941
262.1 mm (10.3 in)
1942
269.5 mm (10.6 in)
1943
296.7 mm (11.7 in)
1944
162.5 mm (6.4 in)
1945
233.9 mm (9.2 in)
1946
140.6 mm (5.5 in)
1947
160.8 mm (6.3 in)
1948
121.7 mm (4.8 in)
1949
161.9 mm (6.4 in)
1950
258.1 mm (10.2 in)
1951
219.6 mm (8.6 in)
1952
245.6 mm (9.7 in)
1953
248.9 mm (9.8 in)
1954
220.0 mm (8.7 in)
1955
436.6 mm (17.2 in)
1956
287.1 mm (11.3 in)
1957
225.3 mm (8.9 in)
1958
189.2 mm (7.4 in)
1959
200.8 mm (7.9 in)
1960
170.2 mm (6.7 in)
1961
188.7 mm (7.4 in)
1962
570.4 mm (22.5 in)
1963
244.4 mm (9.6 in)
1964
425.9 mm (16.8 in)
1965
315.7 mm (12.4 in)
1966
165.9 mm (6.5 in)
1967
288.3 mm (11.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Las Plumas, 1913 to 1967. The record is 162 days in 1928, marked on the chart; the median year is 84 days.
Longest dry spell (CDD) at Las Plumas by year
Year
Longest dry spell (CDD)
1913
3 days
1914
93 days
1915
52 days
1916
30 days
1917
22 days
1918
17 days
1919
21 days
1920
21 days
1921
36 days
1922
24 days
1923
32 days
1924
61 days
1925
25 days
1926
147 days
1927
139 days
1928
162 days
1929
110 days
1930
116 days
1931
94 days
1932
152 days
1933
74 days
1934
88 days
1935
108 days
1936
58 days
1937
107 days
1938
121 days
1939
86 days
1940
34 days
1941
69 days
1942
101 days
1943
90 days
1944
115 days
1945
124 days
1946
59 days
1947
73 days
1948
102 days
1949
59 days
1950
96 days
1951
141 days
1952
73 days
1953
83 days
1954
73 days
1955
92 days
1956
89 days
1957
109 days
1958
45 days
1959
84 days
1960
100 days
1961
106 days
1962
54 days
1963
80 days
1964
75 days
1965
54 days
1966
152 days
1967
97 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
32 years with a frost
Across 32 years with a frost, the median last spring frost at Las Plumas falls on 17 February and the median first autumn frost on 11 December, which leaves a median of 298 days between them.
Fitted over all years, the growing season changes by +7.2 days per decade at this station.
Frost dates and growing season at Las Plumas
Measure
Median, all years
Earliest period
Recent period (1919 to 1965)
Recent against earliest
Fitted trend
Last spring frost
17 February
n/a
19 February
n/a
-5.9 days per decade
First autumn frost
11 December
n/a
11 December
n/a
+1.3 days per decade
Growing days
298 days
n/a
298 days
n/a
+7.2 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
39 years, 1926 to 1965
A day with at least 100.0 mm (3.9 in) of rain is expected about once in 2 years. A day with at least 265.2 mm (10.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Las Plumas: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
100.0 mm (3.9 in)
5 years
137.2 mm (5.4 in)
10 years
164.4 mm (6.5 in)
25 years
202.1 mm (8.0 in)
50 years
232.6 mm (9.2 in)
Longer than the 39 years of record
100 years
265.2 mm (10.4 in)
Longer than the 39 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, 39 years of values from 1926 to 1965.
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: 239.0 mm (9.4 in) in 1962; 194.6 mm (7.7 in) in 1940; 191.5 mm (7.5 in) in 1937.
Station Changes
3 suspected
3 changes were suspected in the annual mean temperature of Las Plumas, at 1932, 1944 and 1960. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1932 ran 1.1 C (2.0 F) higher than in the years before (likely change).
Relative to 5 neighbouring stations, the station's annual mean temperature from 1944 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 1960 ran 0.3 C (0.6 F) lower than in the years before (possible change).
Suspected changes in the annual mean temperature at Las Plumas, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1932
+1.1
+2.0
likely
5
1944
-0.4
-0.7
likely
5
1960
-0.3
-0.6
possible
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 Las Plumas standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Las Plumas 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.