Record envelope, standing records and threshold days for Mt Shasta (USC00045983), California, United States, with 79 years of record.
Key Facts for Mt Shasta
Mt Shasta (USC00045983) is a weather station in California, United States at 41.32 latitude and -122.32 longitude, 1,101 m (3,613 ft) above sea level.
The station reports from 1948 to 2026, 79 years of record.
1,464 records set at Mt Shasta still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Mt Shasta set a daily record high minimum temperature of 16.1 C (61.0 F) on 21 July 2026.
About the Station
Location: California, United States, 41.32 latitude, -122.32 longitude.
Elevation: 1,101 m (3,613 ft).
Period of record: 1948 to 2026, 79 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
7 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 Mt Shasta. The lines show the 2026 daily maximum and minimum. 7 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Mt Shasta, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
19.4 C (66.9 F)
-18.9 C (-2.0 F)
13.3 C (55.9 F)
-7.2 C (19.0 F)
Feb
21.7 C (71.1 F)
-19.4 C (-2.9 F)
17.2 C (63.0 F)
-11.7 C (10.9 F)
Mar
26.7 C (80.1 F)
-11.7 C (10.9 F)
25.6 C (78.1 F)
-2.8 C (27.0 F)
Apr
30.0 C (86.0 F)
-10.0 C (14.0 F)
21.7 C (71.1 F)
-5.6 C (21.9 F)
May
36.1 C (97.0 F)
-6.1 C (21.0 F)
27.2 C (81.0 F)
2.8 C (37.0 F)
Jun
39.4 C (102.9 F)
-3.9 C (25.0 F)
34.4 C (93.9 F)
3.3 C (37.9 F)
Jul
41.1 C (106.0 F)
0.0 C (32.0 F)
31.7 C (89.1 F)
6.1 C (43.0 F)
Aug
40.6 C (105.1 F)
1.1 C (34.0 F)
35.0 C (95.0 F)
5.0 C (41.0 F)
Sep
39.4 C (102.9 F)
-3.9 C (25.0 F)
29.4 C (84.9 F)
2.2 C (36.0 F)
Oct
33.9 C (93.0 F)
-9.4 C (15.1 F)
n/a
n/a
Nov
26.7 C (80.1 F)
-14.4 C (6.1 F)
n/a
n/a
Dec
22.2 C (72.0 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 Mt Shasta still stand. 1949 holds the most, with 49.
Standing records at Mt Shasta by the year they were set
Year set
Standing records
1948
24
1949
49
1950
43
1951
14
1952
28
1953
25
1954
20
1955
32
1956
21
1957
20
1958
18
1959
14
1960
24
1961
15
1962
26
1963
19
1964
25
1965
21
1966
23
1967
23
1968
20
1969
13
1970
19
1971
21
1972
40
1973
16
1974
27
1975
23
1976
14
1977
18
1978
24
1979
14
1980
15
1981
17
1982
13
1983
17
1984
11
1985
20
1986
12
1988
16
1989
20
1990
29
1991
13
1992
20
1993
17
1994
13
1995
31
1996
22
1997
14
1998
7
1999
20
2000
16
2001
12
2002
18
2003
24
2004
9
2005
14
2006
21
2007
25
2008
24
2009
16
2010
4
2011
13
2012
21
2013
20
2014
17
2016
9
2017
9
2018
3
2019
18
2020
21
2021
27
2022
25
2023
2
2024
10
2025
15
2026
11
All-Time Record Progression
6 new records
6 all-time records were set at Mt Shasta between 7 August 1981 and 29 July 2022. Each dot is a new record.
When Mt Shasta set new all-time records
Date
Kind
Detail
1981-08-07
Record high maximum temperature
Record high maximum temperature 40.6 C (105.1 F)
1990-12-21
Record low maximum temperature
Record low maximum temperature -13.9 C (7.0 F)
1990-12-22
Record low minimum temperature
Record low minimum temperature -25.0 C (-13.0 F)
1995-01-09
Record daily precipitation
Record daily precipitation 151.6 mm (6.0 in)
2016-06-08
Record high minimum temperature
Record high minimum temperature 20.6 C (69.1 F)
2022-07-29
Record high maximum temperature
Record high maximum temperature 41.1 C (106.0 F)
Wettest Day of Each Month
Jan: 151.6 mm (6.0 in)
The wettest day on record for each calendar month at Mt Shasta. The most was 151.6 mm (6.0 in) on 9 January 1995.
Record daily precipitation for each month at Mt Shasta
Month
Record daily precipitation (mm)
Date
Jan
151.6 mm (6.0 in)
9 January 1995
Feb
116.8 mm (4.6 in)
17 February 2004
Mar
147.3 mm (5.8 in)
29 March 2024
Apr
71.1 mm (2.8 in)
15 April 1965
May
58.2 mm (2.3 in)
27 May 1990
Jun
44.7 mm (1.8 in)
17 June 2005
Jul
29.0 mm (1.1 in)
5 July 2000
Aug
30.5 mm (1.2 in)
20 August 1997
Sep
86.4 mm (3.4 in)
26 September 1957
Oct
104.9 mm (4.1 in)
29 October 1950
Nov
111.0 mm (4.4 in)
16 November 1981
Dec
124.5 mm (4.9 in)
14 December 2002
Period of Record Coverage
1948 to 2026
Complete yearUnder 90 percent of days
77 years of record at Mt Shasta, 1948 to 2026. 23 years have data for under 90 percent of days and are left out of rankings: 1948, 1984, 1985, 1986, 1993, 1996, 1997, 1998 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 61 complete years at Mt Shasta, 1949 to 2025. Blue stripes are years cooler than the station's own mean of 9.9 C (49.8 F); red stripes are warmer. The coolest year was 1982, at 8.6 C (47.6 F), and the warmest was 2013, at 11.2 C (52.1 F). The strongest colour marks a difference of 1.4 C (2.5 F).
Annual mean temperature at Mt Shasta as warming stripes, 1949 to 2025
Year
Annual mean temperature
Difference from the station mean
1949
9.4 C
-0.46 C
1950
10.1 C
+0.26 C
1951
10.0 C
+0.09 C
1952
9.8 C
-0.12 C
1953
9.8 C
-0.06 C
1954
9.5 C
-0.34 C
1955
9.0 C
-0.87 C
1956
9.4 C
-0.44 C
1957
9.1 C
-0.77 C
1958
10.7 C
+0.84 C
1959
10.6 C
+0.72 C
1960
10.3 C
+0.45 C
1961
10.1 C
+0.26 C
1962
10.0 C
+0.14 C
1963
9.8 C
-0.11 C
1964
9.2 C
-0.72 C
1965
9.9 C
-0.02 C
1966
10.2 C
+0.35 C
1967
9.9 C
+0.02 C
1968
9.7 C
-0.19 C
1969
9.7 C
-0.14 C
1970
10.0 C
+0.12 C
1971
9.0 C
-0.85 C
1972
9.6 C
-0.32 C
1973
10.0 C
+0.13 C
1974
9.9 C
0.00 C
1975
9.1 C
-0.82 C
1976
9.8 C
-0.05 C
1977
9.5 C
-0.36 C
1978
9.2 C
-0.70 C
1979
9.5 C
-0.42 C
1980
9.9 C
0.00 C
1981
10.5 C
+0.61 C
1982
8.6 C
-1.23 C
1983
9.5 C
-0.36 C
1988
10.3 C
+0.38 C
1989
9.3 C
-0.56 C
1990
9.5 C
-0.41 C
1991
10.2 C
+0.34 C
1992
10.8 C
+0.88 C
1994
9.7 C
-0.21 C
1995
10.3 C
+0.39 C
1996
10.1 C
+0.19 C
1997
9.8 C
-0.04 C
1998
9.1 C
-0.80 C
1999
9.6 C
-0.26 C
2000
10.0 C
+0.08 C
2001
10.3 C
+0.40 C
2002
10.3 C
+0.44 C
2003
10.5 C
+0.64 C
2004
10.1 C
+0.22 C
2005
10.0 C
+0.15 C
2006
9.9 C
0.00 C
2007
10.1 C
+0.25 C
2008
10.1 C
+0.27 C
2009
10.5 C
+0.66 C
2011
9.9 C
+0.06 C
2012
10.6 C
+0.76 C
2013
11.2 C
+1.31 C
2024
10.3 C
+0.44 C
2025
9.9 C
+0.02 C
The annual mean temperature here has risen by 0.08 C (0.02 to 0.14) per decade over 1949 to 2025. In Fahrenheit: 0.14 F (0.04 to 0.25) per decade. The slope is a straight line fitted to 61 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Mt Shasta
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.08 C (0.02 to 0.14) per decade
0.14 F (0.04 to 0.25) per decade
1949 to 2025
61
Rise
Mean daily maximum
0.1 C (0.1 to 0.2) per decade
0.3 F (0.1 to 0.4) per decade
1949 to 2025
61
Rise
Mean daily minimum
0.01 C (-0.05 to 0.08) per decade
0.02 F (-0.09 to 0.14) per decade
1949 to 2025
61
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
1948 to 2026
Yearly extremes at Mt Shasta: 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)
2022
36.1 C (97.0 F)
77
Coldest night (TNn)
-25.0 C (-13.0 F)
1990
-12.8 C (9.0 F)
77
Wettest day (Rx1day)
151.6 mm (6.0 in)
1995
71.1 mm (2.8 in)
77
Wettest five days (Rx5day)
446.5 mm (17.6 in)
1995
166.4 mm (6.6 in)
77
Longest dry spell (CDD)
110 days
1957
53 days
77
Hottest day (TXx)
The hottest day of the year at Mt Shasta, 1948 to 2026. The record is 41.1 C (106.0 F) in 2022, marked on the chart; the median year is 36.1 C (97.0 F).
Hottest day (TXx) at Mt Shasta by year
Year
Hottest day (TXx)
1948
36.1 C (97.0 F)
1949
35.0 C (95.0 F)
1950
38.3 C (100.9 F)
1951
36.1 C (97.0 F)
1952
35.6 C (96.1 F)
1953
35.0 C (95.0 F)
1954
34.4 C (93.9 F)
1955
39.4 C (102.9 F)
1956
36.1 C (97.0 F)
1957
32.8 C (91.0 F)
1958
35.0 C (95.0 F)
1959
37.2 C (99.0 F)
1960
37.2 C (99.0 F)
1961
36.7 C (98.1 F)
1962
35.6 C (96.1 F)
1963
33.9 C (93.0 F)
1964
36.1 C (97.0 F)
1965
33.9 C (93.0 F)
1966
36.1 C (97.0 F)
1967
36.7 C (98.1 F)
1968
36.7 C (98.1 F)
1969
35.6 C (96.1 F)
1970
35.6 C (96.1 F)
1971
38.3 C (100.9 F)
1972
39.4 C (102.9 F)
1973
36.1 C (97.0 F)
1974
36.1 C (97.0 F)
1975
36.7 C (98.1 F)
1976
35.6 C (96.1 F)
1977
37.8 C (100.0 F)
1978
37.8 C (100.0 F)
1979
37.8 C (100.0 F)
1980
36.1 C (97.0 F)
1981
40.6 C (105.1 F)
1982
36.1 C (97.0 F)
1983
36.1 C (97.0 F)
1984
37.2 C (99.0 F)
1985
36.7 C (98.1 F)
1986
35.6 C (96.1 F)
1988
37.8 C (100.0 F)
1989
32.8 C (91.0 F)
1990
36.7 C (98.1 F)
1991
36.1 C (97.0 F)
1992
35.6 C (96.1 F)
1993
33.3 C (91.9 F)
1994
36.1 C (97.0 F)
1995
33.3 C (91.9 F)
1996
33.9 C (93.0 F)
1997
33.9 C (93.0 F)
1998
36.7 C (98.1 F)
1999
36.7 C (98.1 F)
2000
34.4 C (93.9 F)
2001
35.0 C (95.0 F)
2002
37.2 C (99.0 F)
2003
37.2 C (99.0 F)
2004
35.6 C (96.1 F)
2005
36.7 C (98.1 F)
2006
38.3 C (100.9 F)
2007
38.9 C (102.0 F)
2008
38.3 C (100.9 F)
2009
37.8 C (100.0 F)
2010
36.1 C (97.0 F)
2011
34.4 C (93.9 F)
2012
37.2 C (99.0 F)
2013
36.1 C (97.0 F)
2014
37.8 C (100.0 F)
2016
32.8 C (91.0 F)
2017
35.6 C (96.1 F)
2018
36.1 C (97.0 F)
2019
35.0 C (95.0 F)
2020
36.7 C (98.1 F)
2021
39.4 C (102.9 F)
2022
41.1 C (106.0 F)
2023
28.9 C (84.0 F)
2024
37.8 C (100.0 F)
2025
35.6 C (96.1 F)
2026
35.0 C (95.0 F)
Coldest night (TNn)
The coldest night of the year at Mt Shasta, 1948 to 2026. The record is -25.0 C (-13.0 F) in 1990, marked on the chart; the median year is -12.8 C (9.0 F).
Coldest night (TNn) at Mt Shasta by year
Year
Coldest night (TNn)
1948
-13.9 C (7.0 F)
1949
-17.2 C (1.0 F)
1950
-18.9 C (-2.0 F)
1951
-12.8 C (9.0 F)
1952
-12.2 C (10.0 F)
1953
-8.9 C (16.0 F)
1954
-12.8 C (9.0 F)
1955
-12.8 C (9.0 F)
1956
-15.0 C (5.0 F)
1957
-16.7 C (1.9 F)
1958
-10.0 C (14.0 F)
1959
-12.2 C (10.0 F)
1960
-12.8 C (9.0 F)
1961
-13.3 C (8.1 F)
1962
-18.9 C (-2.0 F)
1963
-15.0 C (5.0 F)
1964
-12.8 C (9.0 F)
1965
-12.8 C (9.0 F)
1966
-14.4 C (6.1 F)
1967
-13.9 C (7.0 F)
1968
-15.6 C (3.9 F)
1969
-14.4 C (6.1 F)
1970
-12.8 C (9.0 F)
1971
-12.8 C (9.0 F)
1972
-20.6 C (-5.1 F)
1973
-12.2 C (10.0 F)
1974
-14.4 C (6.1 F)
1975
-12.8 C (9.0 F)
1976
-12.2 C (10.0 F)
1977
-15.0 C (5.0 F)
1978
-13.3 C (8.1 F)
1979
-17.8 C (0.0 F)
1980
-13.9 C (7.0 F)
1981
-7.8 C (18.0 F)
1982
-14.4 C (6.1 F)
1983
-11.1 C (12.0 F)
1984
-10.6 C (12.9 F)
1985
-11.7 C (10.9 F)
1986
-5.6 C (21.9 F)
1988
-13.9 C (7.0 F)
1989
-19.4 C (-2.9 F)
1990
-25.0 C (-13.0 F)
1991
-11.7 C (10.9 F)
1992
-12.2 C (10.0 F)
1993
-16.1 C (3.0 F)
1994
-12.2 C (10.0 F)
1995
-10.6 C (12.9 F)
1996
-11.7 C (10.9 F)
1997
-16.7 C (1.9 F)
1998
-21.1 C (-6.0 F)
1999
-11.1 C (12.0 F)
2000
-9.4 C (15.1 F)
2001
-11.1 C (12.0 F)
2002
-15.0 C (5.0 F)
2003
-11.1 C (12.0 F)
2004
-12.8 C (9.0 F)
2005
-10.6 C (12.9 F)
2006
-13.3 C (8.1 F)
2007
-12.8 C (9.0 F)
2008
-16.1 C (3.0 F)
2009
-16.1 C (3.0 F)
2010
-10.6 C (12.9 F)
2011
-13.3 C (8.1 F)
2012
-12.8 C (9.0 F)
2013
-19.4 C (-2.9 F)
2014
-10.0 C (14.0 F)
2016
-15.0 C (5.0 F)
2017
-16.7 C (1.9 F)
2018
-8.9 C (16.0 F)
2019
-11.7 C (10.9 F)
2020
-8.9 C (16.0 F)
2021
-7.8 C (18.0 F)
2022
-10.0 C (14.0 F)
2023
-8.3 C (17.1 F)
2024
-8.9 C (16.0 F)
2025
-15.6 C (3.9 F)
2026
-11.7 C (10.9 F)
Wettest day (Rx1day)
The wettest day of the year at Mt Shasta, 1948 to 2026. The record is 151.6 mm (6.0 in) in 1995, marked on the chart; the median year is 71.1 mm (2.8 in).
Wettest day (Rx1day) at Mt Shasta by year
Year
Wettest day (Rx1day)
1948
38.9 mm (1.5 in)
1949
57.2 mm (2.3 in)
1950
104.9 mm (4.1 in)
1951
69.1 mm (2.7 in)
1952
103.6 mm (4.1 in)
1953
63.5 mm (2.5 in)
1954
85.3 mm (3.4 in)
1955
101.9 mm (4.0 in)
1956
70.9 mm (2.8 in)
1957
86.4 mm (3.4 in)
1958
99.8 mm (3.9 in)
1959
69.9 mm (2.8 in)
1960
105.2 mm (4.1 in)
1961
73.7 mm (2.9 in)
1962
90.2 mm (3.6 in)
1963
61.2 mm (2.4 in)
1964
101.9 mm (4.0 in)
1965
71.1 mm (2.8 in)
1966
83.3 mm (3.3 in)
1967
56.6 mm (2.2 in)
1968
70.4 mm (2.8 in)
1969
63.0 mm (2.5 in)
1970
68.1 mm (2.7 in)
1971
49.8 mm (2.0 in)
1972
42.7 mm (1.7 in)
1973
98.6 mm (3.9 in)
1974
128.8 mm (5.1 in)
1975
73.7 mm (2.9 in)
1976
47.8 mm (1.9 in)
1977
55.1 mm (2.2 in)
1978
102.1 mm (4.0 in)
1979
65.8 mm (2.6 in)
1980
71.9 mm (2.8 in)
1981
111.0 mm (4.4 in)
1982
62.5 mm (2.5 in)
1983
110.2 mm (4.3 in)
1984
36.3 mm (1.4 in)
1985
28.4 mm (1.1 in)
1986
34.8 mm (1.4 in)
1988
50.8 mm (2.0 in)
1989
99.1 mm (3.9 in)
1990
58.2 mm (2.3 in)
1991
68.6 mm (2.7 in)
1992
67.3 mm (2.6 in)
1993
97.0 mm (3.8 in)
1994
89.4 mm (3.5 in)
1995
151.6 mm (6.0 in)
1996
105.4 mm (4.1 in)
1997
94.2 mm (3.7 in)
1998
79.0 mm (3.1 in)
1999
68.1 mm (2.7 in)
2000
68.3 mm (2.7 in)
2001
59.9 mm (2.4 in)
2002
124.5 mm (4.9 in)
2003
73.7 mm (2.9 in)
2004
116.8 mm (4.6 in)
2005
70.9 mm (2.8 in)
2006
86.4 mm (3.4 in)
2007
71.1 mm (2.8 in)
2008
83.1 mm (3.3 in)
2009
96.5 mm (3.8 in)
2010
76.2 mm (3.0 in)
2011
90.2 mm (3.6 in)
2012
94.0 mm (3.7 in)
2013
43.4 mm (1.7 in)
2014
52.1 mm (2.1 in)
2016
66.3 mm (2.6 in)
2017
52.1 mm (2.1 in)
2018
35.6 mm (1.4 in)
2019
90.2 mm (3.6 in)
2020
44.5 mm (1.8 in)
2021
48.3 mm (1.9 in)
2022
44.5 mm (1.8 in)
2023
68.6 mm (2.7 in)
2024
147.3 mm (5.8 in)
2025
71.4 mm (2.8 in)
2026
37.8 mm (1.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Mt Shasta, 1948 to 2026. The record is 446.5 mm (17.6 in) in 1995, marked on the chart; the median year is 166.4 mm (6.6 in).
Wettest five days (Rx5day) at Mt Shasta by year
Year
Wettest five days (Rx5day)
1948
55.1 mm (2.2 in)
1949
180.9 mm (7.1 in)
1950
270.8 mm (10.7 in)
1951
140.8 mm (5.5 in)
1952
188.4 mm (7.4 in)
1953
161.8 mm (6.4 in)
1954
140.9 mm (5.5 in)
1955
275.9 mm (10.9 in)
1956
206.6 mm (8.1 in)
1957
178.8 mm (7.0 in)
1958
195.0 mm (7.7 in)
1959
232.8 mm (9.2 in)
1960
173.5 mm (6.8 in)
1961
128.3 mm (5.1 in)
1962
243.7 mm (9.6 in)
1963
151.4 mm (6.0 in)
1964
255.1 mm (10.0 in)
1965
166.4 mm (6.6 in)
1966
174.9 mm (6.9 in)
1967
126.1 mm (5.0 in)
1968
111.8 mm (4.4 in)
1969
163.3 mm (6.4 in)
1970
130.6 mm (5.1 in)
1971
107.0 mm (4.2 in)
1972
102.1 mm (4.0 in)
1973
178.6 mm (7.0 in)
1974
282.0 mm (11.1 in)
1975
141.1 mm (5.6 in)
1976
87.9 mm (3.5 in)
1977
90.9 mm (3.6 in)
1978
291.6 mm (11.5 in)
1979
137.9 mm (5.4 in)
1980
196.6 mm (7.7 in)
1981
262.5 mm (10.3 in)
1982
124.7 mm (4.9 in)
1983
232.3 mm (9.1 in)
1984
86.6 mm (3.4 in)
1985
43.4 mm (1.7 in)
1986
72.3 mm (2.8 in)
1988
94.5 mm (3.7 in)
1989
194.1 mm (7.6 in)
1990
130.5 mm (5.1 in)
1991
171.5 mm (6.8 in)
1992
229.2 mm (9.0 in)
1993
170.4 mm (6.7 in)
1994
149.3 mm (5.9 in)
1995
446.5 mm (17.6 in)
1996
292.5 mm (11.5 in)
1997
301.9 mm (11.9 in)
1998
259.8 mm (10.2 in)
1999
114.5 mm (4.5 in)
2000
174.0 mm (6.9 in)
2001
141.7 mm (5.6 in)
2002
309.1 mm (12.2 in)
2003
161.5 mm (6.4 in)
2004
216.6 mm (8.5 in)
2005
195.4 mm (7.7 in)
2006
185.8 mm (7.3 in)
2007
114.6 mm (4.5 in)
2008
156.0 mm (6.1 in)
2009
196.8 mm (7.7 in)
2010
236.2 mm (9.3 in)
2011
160.5 mm (6.3 in)
2012
282.8 mm (11.1 in)
2013
49.8 mm (2.0 in)
2014
87.4 mm (3.4 in)
2016
141.8 mm (5.6 in)
2017
64.3 mm (2.5 in)
2018
72.6 mm (2.9 in)
2019
196.2 mm (7.7 in)
2020
59.5 mm (2.3 in)
2021
107.9 mm (4.2 in)
2022
75.0 mm (3.0 in)
2023
171.9 mm (6.8 in)
2024
213.6 mm (8.4 in)
2025
196.4 mm (7.7 in)
2026
104.1 mm (4.1 in)
Longest dry spell (CDD)
The longest dry spell of the year at Mt Shasta, 1948 to 2026. The record is 110 days in 1957, marked on the chart; the median year is 53 days.
Longest dry spell (CDD) at Mt Shasta by year
Year
Longest dry spell (CDD)
1948
25 days
1949
97 days
1950
76 days
1951
102 days
1952
38 days
1953
81 days
1954
58 days
1955
65 days
1956
68 days
1957
110 days
1958
31 days
1959
84 days
1960
55 days
1961
41 days
1962
70 days
1963
48 days
1964
55 days
1965
53 days
1966
48 days
1967
40 days
1968
56 days
1969
90 days
1970
79 days
1971
51 days
1972
66 days
1973
91 days
1974
82 days
1975
46 days
1976
25 days
1977
31 days
1978
62 days
1979
46 days
1980
73 days
1981
80 days
1982
56 days
1983
49 days
1984
37 days
1985
58 days
1986
50 days
1988
61 days
1989
52 days
1990
28 days
1991
46 days
1992
44 days
1993
54 days
1994
44 days
1995
84 days
1996
32 days
1997
24 days
1998
53 days
1999
64 days
2000
35 days
2001
62 days
2002
61 days
2003
50 days
2004
53 days
2005
76 days
2006
96 days
2007
65 days
2008
68 days
2009
42 days
2010
51 days
2011
55 days
2012
96 days
2013
51 days
2014
38 days
2016
12 days
2017
5 days
2018
50 days
2019
37 days
2020
38 days
2021
42 days
2022
44 days
2023
54 days
2024
56 days
2025
48 days
2026
73 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
61 years with a frost
Across 61 years with a frost, the median last spring frost at Mt Shasta falls on 23 May and the median first autumn frost on 3 October, which leaves a median of 129 days between them.
In 1980 to 2025 the median growing season was 130 days. That is 2 days more than in 1949 to 1978.
Fitted over all years, the growing season changes by 0.0 days per decade at this station.
Frost dates and growing season at Mt Shasta
Measure
Median, all years
Earliest period (1949 to 1978)
Recent period (1980 to 2025)
Recent against earliest
Fitted trend
Last spring frost
23 May
24 May
22 May
2 days earlier
0.0 days per decade
First autumn frost
3 October
2 October
4 October
2 days later
0.0 days per decade
Growing days
129 days
128 days
130 days
2 days more
0.0 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
64 years, 1949 to 2025
A day with at least 78.2 mm (3.1 in) of rain is expected about once in 2 years. A day with at least 152.1 mm (6.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Mt Shasta: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
78.2 mm (3.1 in)
5 years
100.2 mm (3.9 in)
10 years
113.8 mm (4.5 in)
25 years
130.0 mm (5.1 in)
50 years
141.4 mm (5.6 in)
100 years
152.1 mm (6.0 in)
Longer than the 64 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, 64 years of values from 1949 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: 151.6 mm (6.0 in) in 1995; 147.3 mm (5.8 in) in 2024; 128.8 mm (5.1 in) in 1974.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Mt Shasta standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Mt Shasta 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.