Record envelope, standing records and threshold days for Alpine (USC00040136), California, United States, with 75 years of record.
Key Facts for Alpine
Alpine (USC00040136) is a weather station in California, United States at 32.84 latitude and -116.78 longitude, 517 m (1,695 ft) above sea level.
The station reports from 1952 to 2026, 75 years of record.
1,464 records set at Alpine still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Alpine set a daily record high minimum temperature of 22.2 C (72.0 F) on 26 July 2026.
About the Station
Location: California, United States, 32.84 latitude, -116.78 longitude.
Elevation: 517 m (1,695 ft).
Period of record: 1952 to 2026, 75 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
14 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 Alpine. The lines show the 2026 daily maximum and minimum. 14 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Alpine, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
31.7 C (89.1 F)
-7.2 C (19.0 F)
27.8 C (82.0 F)
1.7 C (35.1 F)
Feb
32.2 C (90.0 F)
-6.7 C (19.9 F)
32.2 C (90.0 F)
2.2 C (36.0 F)
Mar
37.2 C (99.0 F)
-2.8 C (27.0 F)
37.2 C (99.0 F)
5.6 C (42.1 F)
Apr
39.4 C (102.9 F)
-1.1 C (30.0 F)
30.6 C (87.1 F)
6.7 C (44.1 F)
May
40.0 C (104.0 F)
2.2 C (36.0 F)
32.8 C (91.0 F)
6.1 C (43.0 F)
Jun
42.8 C (109.0 F)
3.9 C (39.0 F)
35.6 C (96.1 F)
8.3 C (46.9 F)
Jul
44.4 C (111.9 F)
4.4 C (39.9 F)
36.7 C (98.1 F)
12.2 C (54.0 F)
Aug
42.2 C (108.0 F)
4.4 C (39.9 F)
38.3 C (100.9 F)
16.1 C (61.0 F)
Sep
45.0 C (113.0 F)
3.3 C (37.9 F)
n/a
n/a
Oct
39.4 C (102.9 F)
-1.1 C (30.0 F)
n/a
n/a
Nov
35.6 C (96.1 F)
-2.2 C (28.0 F)
n/a
n/a
Dec
32.2 C (90.0 F)
-5.6 C (21.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Alpine still stand. 1953 holds the most, with 53.
Standing records at Alpine by the year they were set
Year set
Standing records
1952
3
1953
53
1954
37
1955
41
1956
49
1957
36
1958
38
1959
21
1960
18
1961
17
1962
34
1963
31
1964
21
1965
29
1966
17
1967
27
1968
9
1969
9
1970
25
1971
41
1972
23
1973
33
1974
15
1975
22
1976
16
1977
27
1978
24
1979
24
1980
21
1981
14
1982
11
1983
7
1984
15
1985
25
1986
17
1987
20
1988
16
1989
26
1990
28
1991
24
1992
17
1993
4
1994
12
1995
15
1996
12
1997
16
1998
11
1999
16
2000
16
2001
12
2002
16
2003
23
2004
25
2005
6
2006
2
2007
7
2008
9
2009
15
2010
48
2011
14
2012
11
2013
16
2014
9
2015
17
2016
14
2017
19
2018
14
2019
12
2020
14
2021
14
2022
7
2023
12
2024
10
2025
10
2026
25
All-Time Record Progression
4 new records
4 all-time records were set at Alpine between 1 March 1991 and 5 September 2020. Each dot is a new record.
When Alpine set new all-time records
Date
Kind
Detail
1991-03-01
Record daily precipitation
Record daily precipitation 121.9 mm (4.8 in)
1997-08-06
Record high minimum temperature
Record high minimum temperature 30.0 C (86.0 F)
1999-04-02
Record daily snowfall
Record daily snowfall 2.5 cm (1.0 in)
2020-09-05
Record high maximum temperature
Record high maximum temperature 45.0 C (113.0 F)
Wettest Day of Each Month
Mar: 121.9 mm (4.8 in)
The wettest day on record for each calendar month at Alpine. The most was 121.9 mm (4.8 in) on 1 March 1991.
Record daily precipitation for each month at Alpine
Month
Record daily precipitation (mm)
Date
Jan
91.4 mm (3.6 in)
7 January 1993
Feb
80.8 mm (3.2 in)
21 February 1980
Mar
121.9 mm (4.8 in)
1 March 1991
Apr
44.7 mm (1.8 in)
7 April 1958
May
39.1 mm (1.5 in)
9 May 1977
Jun
30.7 mm (1.2 in)
6 June 1972
Jul
20.1 mm (0.8 in)
28 July 1984
Aug
44.5 mm (1.8 in)
17 August 1977
Sep
79.5 mm (3.1 in)
10 September 1976
Oct
48.5 mm (1.9 in)
19 October 2010
Nov
78.5 mm (3.1 in)
23 November 1965
Dec
82.3 mm (3.2 in)
5 December 1966
Period of Record Coverage
1952 to 2026
Complete yearUnder 90 percent of days
75 years of record at Alpine, 1952 to 2026. 25 years have data for under 90 percent of days and are left out of rankings: 1952, 1971, 1973, 1984, 1988, 1989, 1990, 1991 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 52 complete years at Alpine, 1953 to 2025. Blue stripes are years cooler than the station's own mean of 17.5 C (63.4 F); red stripes are warmer. The coolest year was 1962, at 15.7 C (60.3 F), and the warmest was 1981, at 18.9 C (66.0 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Alpine as warming stripes, 1953 to 2025
Year
Annual mean temperature
Difference from the station mean
1953
16.4 C
-1.09 C
1954
16.7 C
-0.75 C
1955
16.2 C
-1.26 C
1956
16.6 C
-0.89 C
1957
16.7 C
-0.78 C
1958
17.6 C
+0.15 C
1959
18.6 C
+1.19 C
1960
17.9 C
+0.46 C
1961
17.1 C
-0.34 C
1962
15.7 C
-1.72 C
1963
16.2 C
-1.24 C
1964
16.6 C
-0.84 C
1965
16.7 C
-0.72 C
1966
17.6 C
+0.10 C
1967
17.7 C
+0.26 C
1968
18.0 C
+0.52 C
1970
17.5 C
+0.08 C
1974
17.5 C
+0.03 C
1975
17.0 C
-0.46 C
1976
17.9 C
+0.42 C
1977
18.0 C
+0.50 C
1978
18.1 C
+0.61 C
1979
18.0 C
+0.52 C
1980
18.3 C
+0.83 C
1981
18.9 C
+1.43 C
1983
17.7 C
+0.22 C
1985
17.3 C
-0.11 C
1986
17.7 C
+0.29 C
1987
16.9 C
-0.58 C
1988
17.5 C
+0.07 C
1989
18.2 C
+0.72 C
1995
18.3 C
+0.82 C
2000
18.1 C
+0.66 C
2001
17.5 C
+0.04 C
2002
17.2 C
-0.24 C
2009
17.7 C
+0.26 C
2010
16.2 C
-1.22 C
2011
16.4 C
-1.09 C
2012
17.3 C
-0.18 C
2013
17.2 C
-0.28 C
2014
18.6 C
+1.14 C
2015
18.4 C
+0.92 C
2016
18.0 C
+0.51 C
2017
18.4 C
+0.99 C
2018
18.1 C
+0.68 C
2019
16.9 C
-0.54 C
2020
18.0 C
+0.52 C
2021
17.3 C
-0.17 C
2022
17.9 C
+0.47 C
2023
16.6 C
-0.88 C
2024
17.4 C
-0.02 C
2025
17.6 C
+0.18 C
The fitted trend in annual mean temperature here over 1953 to 2025 is 0.08 C (0.00 to 0.16) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.14 F (-0.01 to 0.30) per decade. The slope is a straight line fitted to 52 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Alpine
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.08 C (0.00 to 0.16) per decade
0.14 F (-0.01 to 0.30) per decade
1953 to 2025
52
Not clearly different from zero
Mean daily maximum
-0.13 C (-0.23 to -0.02) per decade
-0.23 F (-0.42 to -0.03) per decade
1953 to 2025
52
Fall
Mean daily minimum
0.3 C (0.2 to 0.4) per decade
0.5 F (0.3 to 0.7) per decade
1953 to 2025
52
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
1952 to 2026
Yearly extremes at Alpine: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
45.0 C (113.0 F)
2020
40.6 C (105.1 F)
75
Coldest night (TNn)
-7.2 C (19.0 F)
1963
-1.1 C (30.0 F)
75
Wettest day (Rx1day)
121.9 mm (4.8 in)
1991
41.9 mm (1.6 in)
75
Wettest five days (Rx5day)
215.1 mm (8.5 in)
1980
74.5 mm (2.9 in)
75
Longest dry spell (CDD)
185 days
2009
79 days
75
Hottest day (TXx)
The hottest day of the year at Alpine, 1952 to 2026. The record is 45.0 C (113.0 F) in 2020, marked on the chart; the median year is 40.6 C (105.1 F).
Hottest day (TXx) at Alpine by year
Year
Hottest day (TXx)
1952
36.7 C (98.1 F)
1953
40.6 C (105.1 F)
1954
39.4 C (102.9 F)
1955
43.3 C (109.9 F)
1956
41.7 C (107.1 F)
1957
42.8 C (109.0 F)
1958
41.7 C (107.1 F)
1959
40.6 C (105.1 F)
1960
44.4 C (111.9 F)
1961
38.9 C (102.0 F)
1962
37.8 C (100.0 F)
1963
41.7 C (107.1 F)
1964
37.8 C (100.0 F)
1965
39.4 C (102.9 F)
1966
37.8 C (100.0 F)
1967
41.7 C (107.1 F)
1968
39.4 C (102.9 F)
1969
41.7 C (107.1 F)
1970
41.7 C (107.1 F)
1971
43.3 C (109.9 F)
1972
41.7 C (107.1 F)
1973
41.7 C (107.1 F)
1974
41.7 C (107.1 F)
1975
39.4 C (102.9 F)
1976
42.8 C (109.0 F)
1977
41.1 C (106.0 F)
1978
42.2 C (108.0 F)
1979
42.2 C (108.0 F)
1980
42.8 C (109.0 F)
1981
42.2 C (108.0 F)
1982
42.8 C (109.0 F)
1983
41.1 C (106.0 F)
1984
43.9 C (111.0 F)
1985
42.2 C (108.0 F)
1986
36.7 C (98.1 F)
1987
40.0 C (104.0 F)
1988
40.6 C (105.1 F)
1989
41.1 C (106.0 F)
1990
41.7 C (107.1 F)
1991
38.9 C (102.0 F)
1992
38.3 C (100.9 F)
1993
38.3 C (100.9 F)
1994
40.6 C (105.1 F)
1995
38.9 C (102.0 F)
1996
38.3 C (100.9 F)
1997
38.9 C (102.0 F)
1998
41.1 C (106.0 F)
1999
38.3 C (100.9 F)
2000
38.9 C (102.0 F)
2001
37.2 C (99.0 F)
2002
40.6 C (105.1 F)
2003
38.3 C (100.9 F)
2004
37.2 C (99.0 F)
2005
38.3 C (100.9 F)
2006
42.8 C (109.0 F)
2007
40.0 C (104.0 F)
2008
39.4 C (102.9 F)
2009
39.4 C (102.9 F)
2010
40.0 C (104.0 F)
2011
37.2 C (99.0 F)
2012
37.8 C (100.0 F)
2013
37.8 C (100.0 F)
2014
38.3 C (100.9 F)
2015
38.3 C (100.9 F)
2016
41.1 C (106.0 F)
2017
41.7 C (107.1 F)
2018
42.8 C (109.0 F)
2019
38.3 C (100.9 F)
2020
45.0 C (113.0 F)
2021
37.8 C (100.0 F)
2022
40.6 C (105.1 F)
2023
38.9 C (102.0 F)
2024
42.2 C (108.0 F)
2025
39.4 C (102.9 F)
2026
38.3 C (100.9 F)
Coldest night (TNn)
The coldest night of the year at Alpine, 1952 to 2026. The record is -7.2 C (19.0 F) in 1963, marked on the chart; the median year is -1.1 C (30.0 F).
Coldest night (TNn) at Alpine by year
Year
Coldest night (TNn)
1952
-0.6 C (30.9 F)
1953
-5.6 C (21.9 F)
1954
-5.6 C (21.9 F)
1955
-3.3 C (26.1 F)
1956
-2.8 C (27.0 F)
1957
-2.2 C (28.0 F)
1958
-2.2 C (28.0 F)
1959
0.0 C (32.0 F)
1960
-3.9 C (25.0 F)
1961
0.6 C (33.1 F)
1962
-2.8 C (27.0 F)
1963
-7.2 C (19.0 F)
1964
-0.6 C (30.9 F)
1965
-2.8 C (27.0 F)
1966
-2.2 C (28.0 F)
1967
-0.6 C (30.9 F)
1968
-3.3 C (26.1 F)
1969
-1.7 C (28.9 F)
1970
-1.1 C (30.0 F)
1971
-3.9 C (25.0 F)
1972
-1.7 C (28.9 F)
1973
-3.3 C (26.1 F)
1974
-4.4 C (24.1 F)
1975
-3.3 C (26.1 F)
1976
-2.2 C (28.0 F)
1977
-1.7 C (28.9 F)
1978
-4.4 C (24.1 F)
1979
-2.2 C (28.0 F)
1980
1.1 C (34.0 F)
1981
0.6 C (33.1 F)
1982
-1.1 C (30.0 F)
1983
0.0 C (32.0 F)
1984
-3.3 C (26.1 F)
1985
-2.8 C (27.0 F)
1986
0.6 C (33.1 F)
1987
-3.9 C (25.0 F)
1988
-1.1 C (30.0 F)
1989
-1.1 C (30.0 F)
1990
-3.9 C (25.0 F)
1991
0.0 C (32.0 F)
1992
0.6 C (33.1 F)
1993
0.6 C (33.1 F)
1994
-1.1 C (30.0 F)
1995
1.7 C (35.1 F)
1996
1.7 C (35.1 F)
1997
0.6 C (33.1 F)
1998
1.7 C (35.1 F)
1999
0.6 C (33.1 F)
2000
1.1 C (34.0 F)
2001
-0.6 C (30.9 F)
2002
-1.7 C (28.9 F)
2003
-3.3 C (26.1 F)
2004
-6.7 C (19.9 F)
2005
2.2 C (36.0 F)
2006
-1.1 C (30.0 F)
2007
-2.8 C (27.0 F)
2008
-1.1 C (30.0 F)
2009
-0.6 C (30.9 F)
2010
-1.1 C (30.0 F)
2011
-1.1 C (30.0 F)
2012
-0.6 C (30.9 F)
2013
-2.8 C (27.0 F)
2014
0.0 C (32.0 F)
2015
-1.1 C (30.0 F)
2016
-2.2 C (28.0 F)
2017
0.6 C (33.1 F)
2018
-1.7 C (28.9 F)
2019
-1.7 C (28.9 F)
2020
-2.2 C (28.0 F)
2021
-0.6 C (30.9 F)
2022
-0.6 C (30.9 F)
2023
-0.6 C (30.9 F)
2024
0.6 C (33.1 F)
2025
1.1 C (34.0 F)
2026
1.7 C (35.1 F)
Wettest day (Rx1day)
The wettest day of the year at Alpine, 1952 to 2026. The record is 121.9 mm (4.8 in) in 1991, marked on the chart; the median year is 41.9 mm (1.6 in).
Wettest day (Rx1day) at Alpine by year
Year
Wettest day (Rx1day)
1952
20.1 mm (0.8 in)
1953
23.4 mm (0.9 in)
1954
52.6 mm (2.1 in)
1955
29.2 mm (1.1 in)
1956
30.5 mm (1.2 in)
1957
31.5 mm (1.2 in)
1958
44.7 mm (1.8 in)
1959
33.0 mm (1.3 in)
1960
29.2 mm (1.1 in)
1961
24.9 mm (1.0 in)
1962
41.9 mm (1.6 in)
1963
39.1 mm (1.5 in)
1964
36.1 mm (1.4 in)
1965
78.5 mm (3.1 in)
1966
82.3 mm (3.2 in)
1967
52.1 mm (2.1 in)
1968
22.9 mm (0.9 in)
1969
74.9 mm (2.9 in)
1970
47.8 mm (1.9 in)
1971
33.8 mm (1.3 in)
1972
30.7 mm (1.2 in)
1973
31.0 mm (1.2 in)
1974
76.2 mm (3.0 in)
1975
34.5 mm (1.4 in)
1976
79.5 mm (3.1 in)
1977
44.5 mm (1.8 in)
1978
64.0 mm (2.5 in)
1979
75.9 mm (3.0 in)
1980
80.8 mm (3.2 in)
1981
43.2 mm (1.7 in)
1982
66.0 mm (2.6 in)
1983
45.5 mm (1.8 in)
1984
24.4 mm (1.0 in)
1985
59.2 mm (2.3 in)
1986
77.5 mm (3.1 in)
1987
41.1 mm (1.6 in)
1988
33.3 mm (1.3 in)
1989
16.5 mm (0.6 in)
1990
28.7 mm (1.1 in)
1991
121.9 mm (4.8 in)
1992
49.5 mm (1.9 in)
1993
91.4 mm (3.6 in)
1994
37.3 mm (1.5 in)
1995
69.3 mm (2.7 in)
1996
48.8 mm (1.9 in)
1997
62.2 mm (2.4 in)
1998
55.6 mm (2.2 in)
1999
19.6 mm (0.8 in)
2000
27.2 mm (1.1 in)
2001
41.9 mm (1.6 in)
2002
33.0 mm (1.3 in)
2003
38.9 mm (1.5 in)
2004
50.8 mm (2.0 in)
2005
27.9 mm (1.1 in)
2006
4.8 mm (0.19 in)
2007
16.8 mm (0.7 in)
2008
50.8 mm (2.0 in)
2009
29.2 mm (1.1 in)
2010
59.7 mm (2.4 in)
2011
42.9 mm (1.7 in)
2012
39.6 mm (1.6 in)
2013
30.0 mm (1.2 in)
2014
39.4 mm (1.6 in)
2015
41.4 mm (1.6 in)
2016
34.5 mm (1.4 in)
2017
63.5 mm (2.5 in)
2018
38.9 mm (1.5 in)
2019
74.9 mm (2.9 in)
2020
38.6 mm (1.5 in)
2021
47.2 mm (1.9 in)
2022
50.0 mm (2.0 in)
2023
57.4 mm (2.3 in)
2024
52.8 mm (2.1 in)
2025
41.4 mm (1.6 in)
2026
65.8 mm (2.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Alpine, 1952 to 2026. The record is 215.1 mm (8.5 in) in 1980, marked on the chart; the median year is 74.5 mm (2.9 in).
Wettest five days (Rx5day) at Alpine by year
Year
Wettest five days (Rx5day)
1952
36.9 mm (1.5 in)
1953
38.1 mm (1.5 in)
1954
138.2 mm (5.4 in)
1955
54.1 mm (2.1 in)
1956
49.8 mm (2.0 in)
1957
78.6 mm (3.1 in)
1958
85.1 mm (3.4 in)
1959
79.7 mm (3.1 in)
1960
64.3 mm (2.5 in)
1961
40.6 mm (1.6 in)
1962
79.6 mm (3.1 in)
1963
72.8 mm (2.9 in)
1964
74.5 mm (2.9 in)
1965
131.3 mm (5.2 in)
1966
214.6 mm (8.4 in)
1967
80.7 mm (3.2 in)
1968
26.3 mm (1.0 in)
1969
96.7 mm (3.8 in)
1970
91.5 mm (3.6 in)
1971
78.7 mm (3.1 in)
1972
67.8 mm (2.7 in)
1973
62.0 mm (2.4 in)
1974
148.1 mm (5.8 in)
1975
69.5 mm (2.7 in)
1976
93.2 mm (3.7 in)
1977
88.2 mm (3.5 in)
1978
168.6 mm (6.6 in)
1979
99.6 mm (3.9 in)
1980
215.1 mm (8.5 in)
1981
70.9 mm (2.8 in)
1982
90.5 mm (3.6 in)
1983
151.0 mm (5.9 in)
1984
62.0 mm (2.4 in)
1985
87.4 mm (3.4 in)
1986
84.9 mm (3.3 in)
1987
88.3 mm (3.5 in)
1988
64.5 mm (2.5 in)
1989
29.9 mm (1.2 in)
1990
57.6 mm (2.3 in)
1991
207.2 mm (8.2 in)
1992
94.7 mm (3.7 in)
1993
189.1 mm (7.4 in)
1994
68.5 mm (2.7 in)
1995
145.8 mm (5.7 in)
1996
51.3 mm (2.0 in)
1997
92.7 mm (3.6 in)
1998
121.4 mm (4.8 in)
1999
45.2 mm (1.8 in)
2000
74.2 mm (2.9 in)
2001
55.8 mm (2.2 in)
2002
55.9 mm (2.2 in)
2003
84.6 mm (3.3 in)
2004
81.6 mm (3.2 in)
2005
53.7 mm (2.1 in)
2006
7.3 mm (0.29 in)
2007
19.1 mm (0.8 in)
2008
50.8 mm (2.0 in)
2009
73.7 mm (2.9 in)
2010
141.3 mm (5.6 in)
2011
74.2 mm (2.9 in)
2012
74.1 mm (2.9 in)
2013
40.4 mm (1.6 in)
2014
69.9 mm (2.8 in)
2015
62.8 mm (2.5 in)
2016
82.9 mm (3.3 in)
2017
65.5 mm (2.6 in)
2018
74.2 mm (2.9 in)
2019
104.7 mm (4.1 in)
2020
83.3 mm (3.3 in)
2021
68.1 mm (2.7 in)
2022
73.6 mm (2.9 in)
2023
127.0 mm (5.0 in)
2024
109.7 mm (4.3 in)
2025
60.2 mm (2.4 in)
2026
87.8 mm (3.5 in)
Longest dry spell (CDD)
The longest dry spell of the year at Alpine, 1952 to 2026. The record is 185 days in 2009, marked on the chart; the median year is 79 days.
Longest dry spell (CDD) at Alpine by year
Year
Longest dry spell (CDD)
1952
31 days
1953
97 days
1954
109 days
1955
71 days
1956
75 days
1957
122 days
1958
93 days
1959
157 days
1960
73 days
1961
127 days
1962
98 days
1963
55 days
1964
160 days
1965
67 days
1966
131 days
1967
63 days
1968
78 days
1969
78 days
1970
76 days
1971
63 days
1972
77 days
1973
108 days
1974
108 days
1975
80 days
1976
78 days
1977
66 days
1978
127 days
1979
71 days
1980
146 days
1981
136 days
1982
64 days
1983
92 days
1984
46 days
1985
47 days
1986
106 days
1987
79 days
1988
114 days
1989
124 days
1990
40 days
1991
97 days
1992
68 days
1993
79 days
1994
33 days
1995
75 days
1996
82 days
1997
93 days
1998
76 days
1999
74 days
2000
66 days
2001
148 days
2002
75 days
2003
59 days
2004
181 days
2005
61 days
2006
71 days
2007
79 days
2008
97 days
2009
185 days
2010
75 days
2011
61 days
2012
125 days
2013
79 days
2014
89 days
2015
56 days
2016
113 days
2017
102 days
2018
78 days
2019
99 days
2020
141 days
2021
69 days
2022
99 days
2023
63 days
2024
181 days
2025
85 days
2026
96 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
28 years with a frost
Across 28 years with a frost, the median last spring frost at Alpine falls on 20 February and the median first autumn frost on 15 December, which leaves a median of 302 days between them.
Fitted over all years, the growing season changes by +7.5 days per decade at this station.
Frost dates and growing season at Alpine
Measure
Median, all years
Earliest period
Recent period (1953 to 2021)
Recent against earliest
Fitted trend
Last spring frost
20 February
n/a
20 February
n/a
-5.0 days per decade
First autumn frost
15 December
n/a
15 December
n/a
+2.5 days per decade
Growing days
302 days
n/a
302 days
n/a
+7.5 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, 1953 to 2025
A day with at least 42.7 mm (1.7 in) of rain is expected about once in 2 years. A day with at least 121.2 mm (4.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Alpine: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
42.7 mm (1.7 in)
5 years
60.6 mm (2.4 in)
10 years
73.7 mm (2.9 in)
25 years
91.6 mm (3.6 in)
50 years
105.9 mm (4.2 in)
100 years
121.2 mm (4.8 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 1953 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: 121.9 mm (4.8 in) in 1991; 91.4 mm (3.6 in) in 1993; 82.3 mm (3.2 in) in 1966.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Climate Twins
2011 to 2025 against 1961 to 1990
Over 2011 to 2025, Alpine had a mean temperature of 17.6 C (63.7 F) and 369.4 mm (14.5 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Corona (United States, 137 km away), Alicante El Altet (Spain, 9,798 km away) and Pomona/Fairplex (United States, 166 km away).
Climate twins of Alpine: stations whose 1961 to 1990 climate is closest to its 2011 to 2025 climate
Twins are stations, not cities. A twin is one of the three stations at least 100 km away whose earlier climate is closest to this station's recent one, so a close match does not mean the two places look alike in other ways. A station move or a gap in a record can change that station's averages. The list describes past climate; it is not a forecast and does not say what caused any change. How twins are found, and a search for any station.
Download the Data
Data for Alpine standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Alpine 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.