Record envelope, standing records and threshold days for Fall Rvr Mills (USC00042964), California, United States, with 104 years of record.
Key Facts for Fall Rvr Mills
Fall Rvr Mills (USC00042964) is a weather station in California, United States at 41.01 latitude and -121.44 longitude, 1,006 m (3,300 ft) above sea level.
The station reports from 1923 to 2026, 104 years of record.
1,464 records set at Fall Rvr Mills still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Fall Rvr Mills set a daily record precipitation of 34.3 mm (1.4 in) on 17 March 2025.
About the Station
Location: California, United States, 41.01 latitude, -121.44 longitude.
Elevation: 1,006 m (3,300 ft).
Period of record: 1923 to 2026, 104 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 Fall Rvr Mills. 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 Fall Rvr Mills, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.9 C (66.0 F)
-27.8 C (-18.0 F)
n/a
n/a
Feb
22.2 C (72.0 F)
-26.1 C (-15.0 F)
n/a
n/a
Mar
26.1 C (79.0 F)
-16.1 C (3.0 F)
n/a
n/a
Apr
30.0 C (86.0 F)
-12.2 C (10.0 F)
n/a
n/a
May
33.3 C (91.9 F)
-4.4 C (24.1 F)
n/a
n/a
Jun
39.4 C (102.9 F)
-2.2 C (28.0 F)
n/a
n/a
Jul
41.1 C (106.0 F)
1.7 C (35.1 F)
n/a
n/a
Aug
40.0 C (104.0 F)
-1.1 C (30.0 F)
n/a
n/a
Sep
39.4 C (102.9 F)
-6.1 C (21.0 F)
n/a
n/a
Oct
34.4 C (93.9 F)
-10.0 C (14.0 F)
n/a
n/a
Nov
27.8 C (82.0 F)
-13.9 C (7.0 F)
n/a
n/a
Dec
17.2 C (63.0 F)
-27.2 C (-17.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Fall Rvr Mills still stand. 1936 holds the most, with 71.
Standing records at Fall Rvr Mills by the year they were set
Year set
Standing records
1923
53
1924
68
1925
58
1926
46
1927
43
1928
30
1929
58
1930
39
1931
35
1932
45
1933
47
1934
39
1935
30
1936
71
1937
41
1938
24
1939
48
1940
33
1941
34
1942
29
1943
40
1944
44
1945
40
1946
24
1947
46
1948
53
1949
52
1950
41
1951
32
1952
31
1953
38
1954
37
1955
54
1956
29
1957
19
1958
10
1959
3
All-Time Record Progression
2 new records
2 all-time records were set at Fall Rvr Mills between 17 January 2019 and 3 February 2025. Each dot is a new record.
When Fall Rvr Mills set new all-time records
Date
Kind
Detail
2019-01-17
Record daily precipitation
Record daily precipitation 84.3 mm (3.3 in)
2025-02-03
Record daily precipitation
Record daily precipitation 87.9 mm (3.5 in)
Wettest Day of Each Month
Feb: 87.9 mm (3.5 in)
The wettest day on record for each calendar month at Fall Rvr Mills. The most was 87.9 mm (3.5 in) on 3 February 2025.
Record daily precipitation for each month at Fall Rvr Mills
Month
Record daily precipitation (mm)
Date
Jan
84.3 mm (3.3 in)
17 January 2019
Feb
87.9 mm (3.5 in)
3 February 2025
Mar
52.6 mm (2.1 in)
24 March 1948
Apr
46.5 mm (1.8 in)
7 April 1935
May
56.4 mm (2.2 in)
28 May 2019
Jun
29.2 mm (1.1 in)
12 June 1958
Jul
44.5 mm (1.8 in)
3 July 2013
Aug
22.4 mm (0.9 in)
27 August 1942
Sep
31.8 mm (1.3 in)
30 September 1971
Oct
45.7 mm (1.8 in)
25 October 1940
Nov
73.2 mm (2.9 in)
8 November 2005
Dec
83.6 mm (3.3 in)
10 December 1937
Period of Record Coverage
1923 to 1959
Complete yearUnder 90 percent of days
37 years of record at Fall Rvr Mills, 1923 to 1959. 7 years have data for under 90 percent of days and are left out of rankings: 1923, 1954, 1955, 1956, 1957, 1958, 1959.
Cooler than the station meanWarmer than the station mean
One stripe for each of 32 complete years at Fall Rvr Mills, 1924 to 1958. Blue stripes are years cooler than the station's own mean of 9.9 C (49.9 F); red stripes are warmer. The coolest year was 1937, at 8.6 C (47.4 F), and the warmest was 1940, at 11.7 C (53.0 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Fall Rvr Mills as warming stripes, 1924 to 1958
Year
Annual mean temperature
Difference from the station mean
1924
10.9 C
+0.94 C
1925
10.5 C
+0.57 C
1926
11.3 C
+1.38 C
1927
9.6 C
-0.30 C
1928
10.3 C
+0.37 C
1929
9.9 C
-0.03 C
1930
9.7 C
-0.21 C
1931
10.3 C
+0.35 C
1932
9.3 C
-0.65 C
1933
8.9 C
-1.03 C
1934
11.5 C
+1.60 C
1935
9.3 C
-0.58 C
1936
10.1 C
+0.15 C
1937
8.6 C
-1.37 C
1938
10.0 C
+0.03 C
1939
10.2 C
+0.27 C
1940
11.7 C
+1.77 C
1941
10.7 C
+0.77 C
1942
9.7 C
-0.21 C
1943
10.3 C
+0.33 C
1944
9.5 C
-0.44 C
1945
10.1 C
+0.19 C
1946
9.4 C
-0.50 C
1947
10.0 C
+0.09 C
1949
8.8 C
-1.17 C
1950
10.1 C
+0.16 C
1951
10.0 C
+0.12 C
1952
9.4 C
-0.50 C
1955
8.9 C
-0.99 C
1956
9.3 C
-0.59 C
1957
9.0 C
-0.96 C
1958
10.3 C
+0.35 C
The annual mean temperature here has fallen by 0.27 C (0.00 to 0.53) per decade over 1924 to 1958. In Fahrenheit: 0.48 F (0.01 to 0.96) per decade. The slope is a straight line fitted to 32 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Fall Rvr Mills
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.27 C (-0.53 to 0.00) per decade
-0.48 F (-0.96 to -0.01) per decade
1924 to 1958
32
Fall
Mean daily maximum
-0.5 C (-0.8 to -0.2) per decade
-0.8 F (-1.4 to -0.3) per decade
1924 to 1958
32
Fall
Mean daily minimum
-0.1 C (-0.4 to 0.3) per decade
-0.1 F (-0.8 to 0.5) per decade
1924 to 1958
32
Not clearly different from zero
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
1923 to 2026
Yearly extremes at Fall Rvr Mills: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.1 C (106.0 F)
1928
37.8 C (100.0 F)
37
Coldest night (TNn)
-27.8 C (-18.0 F)
1937
-16.7 C (1.9 F)
37
Wettest day (Rx1day)
87.9 mm (3.5 in)
2025
34.8 mm (1.4 in)
74
Wettest five days (Rx5day)
155.2 mm (6.1 in)
2024
62.9 mm (2.5 in)
74
Longest dry spell (CDD)
144 days
2020
62 days
74
Hottest day (TXx)
The hottest day of the year at Fall Rvr Mills, 1923 to 2026. The record is 41.1 C (106.0 F) in 1928, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Fall Rvr Mills by year
Year
Hottest day (TXx)
1923
37.8 C (100.0 F)
1924
39.4 C (102.9 F)
1925
38.9 C (102.0 F)
1926
36.7 C (98.1 F)
1927
36.7 C (98.1 F)
1928
41.1 C (106.0 F)
1929
38.9 C (102.0 F)
1930
37.2 C (99.0 F)
1931
39.4 C (102.9 F)
1932
38.9 C (102.0 F)
1933
40.0 C (104.0 F)
1934
38.3 C (100.9 F)
1935
38.9 C (102.0 F)
1936
38.9 C (102.0 F)
1937
36.7 C (98.1 F)
1938
39.4 C (102.9 F)
1939
38.9 C (102.0 F)
1940
37.2 C (99.0 F)
1941
36.7 C (98.1 F)
1942
38.3 C (100.9 F)
1943
36.1 C (97.0 F)
1944
38.9 C (102.0 F)
1945
39.4 C (102.9 F)
1946
40.0 C (104.0 F)
1947
36.7 C (98.1 F)
1948
33.3 C (91.9 F)
1949
35.6 C (96.1 F)
1950
38.9 C (102.0 F)
1951
36.1 C (97.0 F)
1952
36.1 C (97.0 F)
1953
35.6 C (96.1 F)
1954
35.6 C (96.1 F)
1955
39.4 C (102.9 F)
1956
37.8 C (100.0 F)
1957
34.4 C (93.9 F)
1958
34.4 C (93.9 F)
1959
23.9 C (75.0 F)
1964
n/a
1965
n/a
1966
n/a
1967
n/a
1968
n/a
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1997
n/a
1998
n/a
1999
n/a
2000
n/a
2001
n/a
2002
n/a
2003
n/a
2005
n/a
2006
n/a
2007
n/a
2008
n/a
2009
n/a
2010
n/a
2011
n/a
2012
n/a
2013
n/a
2014
n/a
2015
n/a
2016
n/a
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
Coldest night (TNn)
The coldest night of the year at Fall Rvr Mills, 1923 to 2026. The record is -27.8 C (-18.0 F) in 1937, marked on the chart; the median year is -16.7 C (1.9 F).
Coldest night (TNn) at Fall Rvr Mills by year
Year
Coldest night (TNn)
1923
-8.3 C (17.1 F)
1924
-23.3 C (-9.9 F)
1925
-15.0 C (5.0 F)
1926
-13.9 C (7.0 F)
1927
-12.2 C (10.0 F)
1928
-20.6 C (-5.1 F)
1929
-13.9 C (7.0 F)
1930
-24.4 C (-11.9 F)
1931
-15.0 C (5.0 F)
1932
-27.2 C (-17.0 F)
1933
-26.1 C (-15.0 F)
1934
-11.7 C (10.9 F)
1935
-18.9 C (-2.0 F)
1936
-18.9 C (-2.0 F)
1937
-27.8 C (-18.0 F)
1938
-17.8 C (0.0 F)
1939
-17.8 C (0.0 F)
1940
-14.4 C (6.1 F)
1941
-15.0 C (5.0 F)
1942
-21.1 C (-6.0 F)
1943
-17.8 C (0.0 F)
1944
-14.4 C (6.1 F)
1945
-12.2 C (10.0 F)
1946
-17.8 C (0.0 F)
1947
-13.3 C (8.1 F)
1948
-24.4 C (-11.9 F)
1949
-25.6 C (-14.1 F)
1950
-20.6 C (-5.1 F)
1951
-13.3 C (8.1 F)
1952
-20.0 C (-4.0 F)
1953
-11.1 C (12.0 F)
1954
-13.3 C (8.1 F)
1955
-15.6 C (3.9 F)
1956
-16.7 C (1.9 F)
1957
-19.4 C (-2.9 F)
1958
-8.9 C (16.0 F)
1959
-14.4 C (6.1 F)
1964
n/a
1965
n/a
1966
n/a
1967
n/a
1968
n/a
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1997
n/a
1998
n/a
1999
n/a
2000
n/a
2001
n/a
2002
n/a
2003
n/a
2005
n/a
2006
n/a
2007
n/a
2008
n/a
2009
n/a
2010
n/a
2011
n/a
2012
n/a
2013
n/a
2014
n/a
2015
n/a
2016
n/a
2017
n/a
2018
n/a
2019
n/a
2020
n/a
2021
n/a
2022
n/a
2023
n/a
2024
n/a
2025
n/a
2026
n/a
Wettest day (Rx1day)
The wettest day of the year at Fall Rvr Mills, 1923 to 2026. The record is 87.9 mm (3.5 in) in 2025, marked on the chart; the median year is 34.8 mm (1.4 in).
Wettest day (Rx1day) at Fall Rvr Mills by year
Year
Wettest day (Rx1day)
1923
25.1 mm (1.0 in)
1924
29.2 mm (1.1 in)
1925
28.4 mm (1.1 in)
1926
28.7 mm (1.1 in)
1927
33.3 mm (1.3 in)
1928
42.4 mm (1.7 in)
1929
23.1 mm (0.9 in)
1930
39.4 mm (1.6 in)
1931
50.8 mm (2.0 in)
1932
23.6 mm (0.9 in)
1933
26.7 mm (1.1 in)
1934
22.4 mm (0.9 in)
1935
46.5 mm (1.8 in)
1936
35.6 mm (1.4 in)
1937
83.6 mm (3.3 in)
1938
44.2 mm (1.7 in)
1939
40.9 mm (1.6 in)
1940
45.7 mm (1.8 in)
1941
49.5 mm (1.9 in)
1942
72.4 mm (2.9 in)
1943
40.9 mm (1.6 in)
1944
27.9 mm (1.1 in)
1945
35.6 mm (1.4 in)
1946
35.1 mm (1.4 in)
1947
31.5 mm (1.2 in)
1948
52.6 mm (2.1 in)
1949
14.7 mm (0.6 in)
1950
33.8 mm (1.3 in)
1951
42.7 mm (1.7 in)
1952
28.4 mm (1.1 in)
1953
19.8 mm (0.8 in)
1954
39.6 mm (1.6 in)
1955
30.5 mm (1.2 in)
1956
24.4 mm (1.0 in)
1957
48.3 mm (1.9 in)
1958
30.5 mm (1.2 in)
1959
15.2 mm (0.6 in)
1964
36.8 mm (1.4 in)
1965
22.9 mm (0.9 in)
1966
27.9 mm (1.1 in)
1967
39.4 mm (1.6 in)
1968
34.3 mm (1.4 in)
1969
30.5 mm (1.2 in)
1970
34.5 mm (1.4 in)
1971
31.8 mm (1.3 in)
1972
51.3 mm (2.0 in)
1997
23.1 mm (0.9 in)
1998
45.2 mm (1.8 in)
1999
45.7 mm (1.8 in)
2000
27.9 mm (1.1 in)
2001
25.4 mm (1.0 in)
2002
18.3 mm (0.7 in)
2003
9.7 mm (0.38 in)
2005
73.2 mm (2.9 in)
2006
36.6 mm (1.4 in)
2007
30.2 mm (1.2 in)
2008
35.6 mm (1.4 in)
2009
23.9 mm (0.9 in)
2010
44.5 mm (1.8 in)
2011
31.8 mm (1.3 in)
2012
31.5 mm (1.2 in)
2013
44.5 mm (1.8 in)
2014
33.5 mm (1.3 in)
2015
43.4 mm (1.7 in)
2016
49.0 mm (1.9 in)
2017
42.7 mm (1.7 in)
2018
37.6 mm (1.5 in)
2019
84.3 mm (3.3 in)
2020
40.4 mm (1.6 in)
2021
37.3 mm (1.5 in)
2022
23.9 mm (0.9 in)
2023
26.4 mm (1.0 in)
2024
57.7 mm (2.3 in)
2025
87.9 mm (3.5 in)
2026
n/a
Wettest five days (Rx5day)
The wettest five days of the year at Fall Rvr Mills, 1923 to 2026. The record is 155.2 mm (6.1 in) in 2024, marked on the chart; the median year is 62.9 mm (2.5 in).
Wettest five days (Rx5day) at Fall Rvr Mills by year
Year
Wettest five days (Rx5day)
1923
54.0 mm (2.1 in)
1924
46.0 mm (1.8 in)
1925
57.6 mm (2.3 in)
1926
63.8 mm (2.5 in)
1927
83.1 mm (3.3 in)
1928
91.4 mm (3.6 in)
1929
37.4 mm (1.5 in)
1930
57.9 mm (2.3 in)
1931
121.0 mm (4.8 in)
1932
38.8 mm (1.5 in)
1933
46.2 mm (1.8 in)
1934
65.8 mm (2.6 in)
1935
116.8 mm (4.6 in)
1936
65.8 mm (2.6 in)
1937
116.3 mm (4.6 in)
1938
111.1 mm (4.4 in)
1939
68.0 mm (2.7 in)
1940
69.6 mm (2.7 in)
1941
93.6 mm (3.7 in)
1942
124.9 mm (4.9 in)
1943
106.7 mm (4.2 in)
1944
84.3 mm (3.3 in)
1945
60.0 mm (2.4 in)
1946
53.0 mm (2.1 in)
1947
65.3 mm (2.6 in)
1948
73.4 mm (2.9 in)
1949
23.9 mm (0.9 in)
1950
71.9 mm (2.8 in)
1951
103.9 mm (4.1 in)
1952
57.7 mm (2.3 in)
1953
29.2 mm (1.1 in)
1954
68.6 mm (2.7 in)
1955
68.1 mm (2.7 in)
1956
62.0 mm (2.4 in)
1957
55.2 mm (2.2 in)
1958
35.3 mm (1.4 in)
1959
36.8 mm (1.4 in)
1964
93.7 mm (3.7 in)
1965
67.1 mm (2.6 in)
1966
60.8 mm (2.4 in)
1967
67.0 mm (2.6 in)
1968
58.5 mm (2.3 in)
1969
80.3 mm (3.2 in)
1970
90.3 mm (3.6 in)
1971
50.8 mm (2.0 in)
1972
83.2 mm (3.3 in)
1997
44.5 mm (1.8 in)
1998
71.4 mm (2.8 in)
1999
52.1 mm (2.1 in)
2000
43.7 mm (1.7 in)
2001
58.4 mm (2.3 in)
2002
64.7 mm (2.5 in)
2003
30.1 mm (1.2 in)
2005
88.9 mm (3.5 in)
2006
49.0 mm (1.9 in)
2007
59.6 mm (2.3 in)
2008
41.6 mm (1.6 in)
2009
40.0 mm (1.6 in)
2010
60.0 mm (2.4 in)
2011
0.0 mm (0.00 in)
2012
57.9 mm (2.3 in)
2013
44.5 mm (1.8 in)
2014
70.6 mm (2.8 in)
2015
52.3 mm (2.1 in)
2016
94.2 mm (3.7 in)
2017
80.0 mm (3.1 in)
2018
68.6 mm (2.7 in)
2019
105.4 mm (4.1 in)
2020
41.5 mm (1.6 in)
2021
30.9 mm (1.2 in)
2022
46.7 mm (1.8 in)
2023
21.6 mm (0.9 in)
2024
155.2 mm (6.1 in)
2025
141.5 mm (5.6 in)
2026
n/a
Longest dry spell (CDD)
The longest dry spell of the year at Fall Rvr Mills, 1923 to 2026. The record is 144 days in 2020, marked on the chart; the median year is 62 days.
Longest dry spell (CDD) at Fall Rvr Mills by year
Year
Longest dry spell (CDD)
1923
25 days
1924
26 days
1925
25 days
1926
30 days
1927
76 days
1928
72 days
1929
97 days
1930
81 days
1931
79 days
1932
116 days
1933
74 days
1934
61 days
1935
78 days
1936
55 days
1937
54 days
1938
55 days
1939
67 days
1940
66 days
1941
23 days
1942
61 days
1943
88 days
1944
30 days
1945
88 days
1946
46 days
1947
30 days
1948
47 days
1949
57 days
1950
41 days
1951
98 days
1952
37 days
1953
62 days
1954
68 days
1955
36 days
1956
66 days
1957
94 days
1958
25 days
1959
30 days
1964
56 days
1965
62 days
1966
100 days
1967
62 days
1968
71 days
1969
89 days
1970
81 days
1971
47 days
1972
20 days
1997
26 days
1998
58 days
1999
84 days
2000
56 days
2001
64 days
2002
129 days
2003
12 days
2005
31 days
2006
64 days
2007
48 days
2008
96 days
2009
113 days
2010
42 days
2011
63 days
2012
113 days
2013
49 days
2014
42 days
2015
55 days
2016
106 days
2017
86 days
2018
113 days
2019
68 days
2020
144 days
2021
109 days
2022
97 days
2023
95 days
2024
61 days
2025
15 days
2026
n/a
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 Fall Rvr Mills falls on 18 May and the median first autumn frost on 20 September, which leaves a median of 129 days between them.
Fitted over all years, the growing season changes by +5.7 days per decade at this station.
Frost dates and growing season at Fall Rvr Mills
Measure
Median, all years
Earliest period
Recent period (1926 to 1958)
Recent against earliest
Fitted trend
Last spring frost
18 May
n/a
19 May
n/a
+3.6 days per decade
First autumn frost
20 September
n/a
22 September
n/a
+9.2 days per decade
Growing days
129 days
n/a
129 days
n/a
+5.7 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
52 years, 1927 to 2020
A day with at least 36.4 mm (1.4 in) of rain is expected about once in 2 years. A day with at least 80.4 mm (3.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Fall Rvr Mills: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
36.4 mm (1.4 in)
5 years
47.9 mm (1.9 in)
10 years
55.7 mm (2.2 in)
25 years
65.6 mm (2.6 in)
50 years
73.0 mm (2.9 in)
100 years
80.4 mm (3.2 in)
Longer than the 52 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, 52 years of values from 1927 to 2020.
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: 84.3 mm (3.3 in) in 2019; 83.6 mm (3.3 in) in 1937; 72.4 mm (2.9 in) in 1942.
Download the Data
Data for Fall Rvr Mills standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Fall Rvr Mills 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 2026-10-13 (13 October 2026). Records are computed by this site and are not official.