Record envelope, standing records and threshold days for Shonkin 7 S (USC00247540), Montana, United States, with 74 years of record.
Key Facts for Shonkin 7 S
Shonkin 7 S (USC00247540) is a weather station in Montana, United States at 47.53 latitude and -110.58 longitude, 1,309 m (4,295 ft) above sea level.
The station reports from 1953 to 2026, 74 years of record.
1,464 records set at Shonkin 7 S still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Shonkin 7 S set a daily record snowfall of 33.0 cm (13.0 in) on 3 December 2025.
About the Station
Location: Montana, United States, 47.53 latitude, -110.58 longitude.
Elevation: 1,309 m (4,295 ft).
Period of record: 1953 to 2026, 74 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 Shonkin 7 S. 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 Shonkin 7 S, 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)
-37.2 C (-35.0 F)
n/a
n/a
Feb
20.0 C (68.0 F)
-37.8 C (-36.0 F)
n/a
n/a
Mar
26.7 C (80.1 F)
-32.2 C (-26.0 F)
n/a
n/a
Apr
29.4 C (84.9 F)
-22.2 C (-8.0 F)
n/a
n/a
May
31.7 C (89.1 F)
-16.7 C (1.9 F)
n/a
n/a
Jun
36.1 C (97.0 F)
-3.3 C (26.1 F)
n/a
n/a
Jul
37.2 C (99.0 F)
0.0 C (32.0 F)
n/a
n/a
Aug
40.0 C (104.0 F)
-3.9 C (25.0 F)
n/a
n/a
Sep
35.0 C (95.0 F)
-11.7 C (10.9 F)
n/a
n/a
Oct
31.1 C (88.0 F)
-21.1 C (-6.0 F)
n/a
n/a
Nov
24.4 C (75.9 F)
-32.2 C (-26.0 F)
n/a
n/a
Dec
17.2 C (63.0 F)
-41.1 C (-42.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Shonkin 7 S still stand. 1954 holds the most, with 45.
Standing records at Shonkin 7 S by the year they were set
Year set
Standing records
1953
12
1954
45
1955
22
1956
30
1957
24
1958
20
1959
27
1960
28
1961
27
1962
39
1963
24
1964
23
1965
28
1966
32
1967
24
1968
28
1969
30
1970
14
1971
41
1972
30
1973
18
1974
20
1975
21
1976
15
1977
16
1978
18
1979
10
1980
18
1981
14
1982
16
1983
22
1984
27
1985
42
1986
24
1987
21
1988
23
1989
17
1990
22
1991
10
1992
25
1993
21
1994
5
1996
4
1997
2
1998
8
1999
29
2000
17
2001
15
2002
41
2003
27
2004
13
2005
15
2006
18
2007
16
2008
27
2009
27
2010
17
2011
18
2012
31
2013
22
2014
24
2015
22
2016
16
2017
24
2018
14
2019
31
2020
13
All-Time Record Progression
5 new records
5 all-time records were set at Shonkin 7 S between 5 July 2001 and 9 May 2024. Each dot is a new record.
When Shonkin 7 S set new all-time records
Date
Kind
Detail
2001-07-05
Record high minimum temperature
Record high minimum temperature 21.7 C (71.1 F)
2002-07-14
Record high minimum temperature
Record high minimum temperature 22.2 C (72.0 F)
2011-07-31
Record high minimum temperature
Record high minimum temperature 22.8 C (73.0 F)
2016-06-29
Record high minimum temperature
Record high minimum temperature 23.3 C (73.9 F)
2024-05-09
Record daily precipitation
Record daily precipitation 170.2 mm (6.7 in)
Wettest Day of Each Month
May: 170.2 mm (6.7 in)
The wettest day on record for each calendar month at Shonkin 7 S. The most was 170.2 mm (6.7 in) on 9 May 2024.
Record daily precipitation for each month at Shonkin 7 S
Month
Record daily precipitation (mm)
Date
Jan
26.7 mm (1.1 in)
18 January 1975
Feb
40.6 mm (1.6 in)
19 February 2012
Mar
59.4 mm (2.3 in)
17 March 1981
Apr
78.7 mm (3.1 in)
20 April 1973
May
170.2 mm (6.7 in)
9 May 2024
Jun
165.6 mm (6.5 in)
3 June 1953
Jul
92.2 mm (3.6 in)
10 July 1983
Aug
90.2 mm (3.6 in)
15 August 1968
Sep
147.3 mm (5.8 in)
12 September 1978
Oct
58.7 mm (2.3 in)
7 October 2011
Nov
45.2 mm (1.8 in)
1 November 2017
Dec
58.4 mm (2.3 in)
27 December 2003
Period of Record Coverage
1953 to 2020
Complete yearUnder 90 percent of days
67 years of record at Shonkin 7 S, 1953 to 2020. 28 years have data for under 90 percent of days and are left out of rankings: 1953, 1981, 1983, 1984, 1985, 1986, 1987, 1988 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 42 complete years at Shonkin 7 S, 1954 to 2019. Blue stripes are years cooler than the station's own mean of 6.6 C (43.9 F); red stripes are warmer. The coolest year was 2019, at 4.9 C (40.8 F), and the warmest was 2010, at 8.7 C (47.7 F). The strongest colour marks a difference of 2.2 C (4.0 F).
Annual mean temperature at Shonkin 7 S as warming stripes, 1954 to 2019
Year
Annual mean temperature
Difference from the station mean
1954
5.8 C
-0.77 C
1955
4.9 C
-1.69 C
1956
6.9 C
+0.30 C
1957
5.9 C
-0.68 C
1958
7.4 C
+0.80 C
1959
6.1 C
-0.51 C
1960
6.7 C
+0.14 C
1961
7.6 C
+0.98 C
1962
6.6 C
+0.00 C
1963
7.8 C
+1.15 C
1964
6.2 C
-0.42 C
1965
5.8 C
-0.78 C
1966
6.6 C
-0.02 C
1967
6.4 C
-0.21 C
1968
6.2 C
-0.43 C
1969
5.8 C
-0.80 C
1970
5.4 C
-1.17 C
1971
4.9 C
-1.70 C
1972
5.3 C
-1.33 C
1973
6.6 C
+0.00 C
1974
6.9 C
+0.29 C
1975
5.3 C
-1.35 C
1976
7.3 C
+0.70 C
1977
6.7 C
+0.06 C
1978
5.1 C
-1.49 C
1979
6.3 C
-0.32 C
1980
6.4 C
-0.17 C
1981
7.7 C
+1.09 C
1983
6.4 C
-0.19 C
1984
6.2 C
-0.44 C
1985
5.1 C
-1.51 C
1986
7.3 C
+0.69 C
1999
8.7 C
+2.05 C
2000
7.6 C
+0.96 C
2003
7.9 C
+1.33 C
2004
7.7 C
+1.10 C
2007
8.1 C
+1.50 C
2010
8.7 C
+2.13 C
2011
8.5 C
+1.88 C
2013
7.0 C
+0.42 C
2017
6.6 C
-0.02 C
2019
4.9 C
-1.72 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.4) per decade over 1954 to 2019. In Fahrenheit: 0.4 F (0.1 to 0.7) per decade. The slope is a straight line fitted to 42 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Shonkin 7 S
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.4) per decade
0.4 F (0.1 to 0.7) per decade
1954 to 2019
42
Rise
Mean daily maximum
-0.02 C (-0.17 to 0.14) per decade
-0.03 F (-0.31 to 0.25) per decade
1954 to 2019
42
Not clearly different from zero
Mean daily minimum
0.5 C (0.3 to 0.6) per decade
0.8 F (0.5 to 1.2) per decade
1954 to 2019
42
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
1953 to 2026
Yearly extremes at Shonkin 7 S: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
1961
34.4 C (93.9 F)
67
Coldest night (TNn)
-41.1 C (-42.0 F)
1968
-30.6 C (-23.1 F)
67
Wettest day (Rx1day)
170.2 mm (6.7 in)
2024
56.4 mm (2.2 in)
74
Wettest five days (Rx5day)
247.1 mm (9.7 in)
1953
80.8 mm (3.2 in)
74
Longest dry spell (CDD)
60 days
2005
26 days
74
Hottest day (TXx)
The hottest day of the year at Shonkin 7 S, 1953 to 2026. The record is 40.0 C (104.0 F) in 1961, marked on the chart; the median year is 34.4 C (93.9 F).
Hottest day (TXx) at Shonkin 7 S by year
Year
Hottest day (TXx)
1953
36.1 C (97.0 F)
1954
32.8 C (91.0 F)
1955
35.0 C (95.0 F)
1956
35.0 C (95.0 F)
1957
33.3 C (91.9 F)
1958
32.8 C (91.0 F)
1959
34.4 C (93.9 F)
1960
35.6 C (96.1 F)
1961
40.0 C (104.0 F)
1962
31.7 C (89.1 F)
1963
35.0 C (95.0 F)
1964
35.6 C (96.1 F)
1965
34.4 C (93.9 F)
1966
35.0 C (95.0 F)
1967
35.0 C (95.0 F)
1968
32.8 C (91.0 F)
1969
38.9 C (102.0 F)
1970
36.1 C (97.0 F)
1971
36.7 C (98.1 F)
1972
33.3 C (91.9 F)
1973
35.6 C (96.1 F)
1974
35.0 C (95.0 F)
1975
35.6 C (96.1 F)
1976
33.3 C (91.9 F)
1977
31.7 C (89.1 F)
1978
32.2 C (90.0 F)
1979
35.0 C (95.0 F)
1980
33.3 C (91.9 F)
1981
35.0 C (95.0 F)
1982
31.7 C (89.1 F)
1983
36.1 C (97.0 F)
1984
35.6 C (96.1 F)
1985
34.4 C (93.9 F)
1986
33.3 C (91.9 F)
1987
32.8 C (91.0 F)
1988
36.1 C (97.0 F)
1989
35.6 C (96.1 F)
1990
36.1 C (97.0 F)
1991
36.1 C (97.0 F)
1992
33.3 C (91.9 F)
1993
34.4 C (93.9 F)
1994
21.1 C (70.0 F)
1995
n/a
1996
36.1 C (97.0 F)
1997
33.3 C (91.9 F)
1998
33.3 C (91.9 F)
1999
35.0 C (95.0 F)
2000
36.1 C (97.0 F)
2001
35.6 C (96.1 F)
2002
35.0 C (95.0 F)
2003
36.7 C (98.1 F)
2004
34.4 C (93.9 F)
2005
33.9 C (93.0 F)
2006
34.4 C (93.9 F)
2007
37.2 C (99.0 F)
2008
32.2 C (90.0 F)
2009
31.1 C (88.0 F)
2010
33.3 C (91.9 F)
2011
35.0 C (95.0 F)
2012
34.4 C (93.9 F)
2013
34.4 C (93.9 F)
2014
33.3 C (91.9 F)
2015
33.9 C (93.0 F)
2016
32.2 C (90.0 F)
2017
35.0 C (95.0 F)
2018
36.7 C (98.1 F)
2019
32.8 C (91.0 F)
2020
33.9 C (93.0 F)
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 Shonkin 7 S, 1953 to 2026. The record is -41.1 C (-42.0 F) in 1968, marked on the chart; the median year is -30.6 C (-23.1 F).
Coldest night (TNn) at Shonkin 7 S by year
Year
Coldest night (TNn)
1953
-12.8 C (9.0 F)
1954
-35.6 C (-32.1 F)
1955
-33.3 C (-27.9 F)
1956
-32.8 C (-27.0 F)
1957
-34.4 C (-29.9 F)
1958
-27.2 C (-17.0 F)
1959
-30.6 C (-23.1 F)
1960
-32.2 C (-26.0 F)
1961
-28.9 C (-20.0 F)
1962
-30.6 C (-23.1 F)
1963
-35.0 C (-31.0 F)
1964
-37.2 C (-35.0 F)
1965
-28.3 C (-18.9 F)
1966
-31.1 C (-24.0 F)
1967
-30.0 C (-22.0 F)
1968
-41.1 C (-42.0 F)
1969
-35.6 C (-32.1 F)
1970
-30.6 C (-23.1 F)
1971
-37.2 C (-35.0 F)
1972
-35.6 C (-32.1 F)
1973
-27.2 C (-17.0 F)
1974
-32.2 C (-26.0 F)
1975
-29.4 C (-20.9 F)
1976
-29.4 C (-20.9 F)
1977
-36.1 C (-33.0 F)
1978
-31.7 C (-25.1 F)
1979
-28.9 C (-20.0 F)
1980
-30.6 C (-23.1 F)
1981
-29.4 C (-20.9 F)
1982
-32.8 C (-27.0 F)
1983
-37.2 C (-35.0 F)
1984
-31.7 C (-25.1 F)
1985
-32.8 C (-27.0 F)
1986
-26.7 C (-16.1 F)
1987
-27.2 C (-17.0 F)
1988
-25.6 C (-14.1 F)
1989
-37.8 C (-36.0 F)
1990
-36.1 C (-33.0 F)
1991
-27.2 C (-17.0 F)
1992
-32.8 C (-27.0 F)
1993
-28.3 C (-18.9 F)
1994
-34.4 C (-29.9 F)
1995
n/a
1996
1.7 C (35.1 F)
1997
2.2 C (36.0 F)
1998
-30.6 C (-23.1 F)
1999
-21.1 C (-6.0 F)
2000
-28.9 C (-20.0 F)
2001
-20.6 C (-5.1 F)
2002
-27.2 C (-17.0 F)
2003
-28.3 C (-18.9 F)
2004
-30.6 C (-23.1 F)
2005
-30.0 C (-22.0 F)
2006
-33.9 C (-29.0 F)
2007
-25.0 C (-13.0 F)
2008
-32.8 C (-27.0 F)
2009
-31.7 C (-25.1 F)
2010
-15.6 C (3.9 F)
2011
-27.2 C (-17.0 F)
2012
-24.4 C (-11.9 F)
2013
-32.8 C (-27.0 F)
2014
-33.3 C (-27.9 F)
2015
-24.4 C (-11.9 F)
2016
-25.0 C (-13.0 F)
2017
-26.7 C (-16.1 F)
2018
-30.0 C (-22.0 F)
2019
-30.6 C (-23.1 F)
2020
-26.7 C (-16.1 F)
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 Shonkin 7 S, 1953 to 2026. The record is 170.2 mm (6.7 in) in 2024, marked on the chart; the median year is 56.4 mm (2.2 in).
Wettest day (Rx1day) at Shonkin 7 S by year
Year
Wettest day (Rx1day)
1953
165.6 mm (6.5 in)
1954
115.1 mm (4.5 in)
1955
58.2 mm (2.3 in)
1956
39.6 mm (1.6 in)
1957
53.8 mm (2.1 in)
1958
27.4 mm (1.1 in)
1959
119.4 mm (4.7 in)
1960
32.0 mm (1.3 in)
1961
52.1 mm (2.1 in)
1962
134.4 mm (5.3 in)
1963
27.9 mm (1.1 in)
1964
121.7 mm (4.8 in)
1965
62.0 mm (2.4 in)
1966
58.4 mm (2.3 in)
1967
84.3 mm (3.3 in)
1968
90.2 mm (3.6 in)
1969
48.0 mm (1.9 in)
1970
56.9 mm (2.2 in)
1971
51.1 mm (2.0 in)
1972
54.6 mm (2.1 in)
1973
78.7 mm (3.1 in)
1974
68.8 mm (2.7 in)
1975
56.6 mm (2.2 in)
1976
65.8 mm (2.6 in)
1977
63.0 mm (2.5 in)
1978
147.3 mm (5.8 in)
1979
39.9 mm (1.6 in)
1980
65.0 mm (2.6 in)
1981
65.5 mm (2.6 in)
1982
125.0 mm (4.9 in)
1983
92.2 mm (3.6 in)
1984
72.6 mm (2.9 in)
1985
55.1 mm (2.2 in)
1986
72.6 mm (2.9 in)
1987
44.2 mm (1.7 in)
1988
62.5 mm (2.5 in)
1989
53.1 mm (2.1 in)
1990
35.1 mm (1.4 in)
1991
58.9 mm (2.3 in)
1992
49.3 mm (1.9 in)
1993
56.1 mm (2.2 in)
1994
50.0 mm (2.0 in)
1995
54.9 mm (2.2 in)
1996
21.6 mm (0.9 in)
1997
32.0 mm (1.3 in)
1998
31.0 mm (1.2 in)
1999
37.6 mm (1.5 in)
2000
40.4 mm (1.6 in)
2001
35.6 mm (1.4 in)
2002
77.2 mm (3.0 in)
2003
58.4 mm (2.3 in)
2004
73.7 mm (2.9 in)
2005
36.3 mm (1.4 in)
2006
81.3 mm (3.2 in)
2007
65.0 mm (2.6 in)
2008
111.0 mm (4.4 in)
2009
44.2 mm (1.7 in)
2010
62.2 mm (2.4 in)
2011
69.1 mm (2.7 in)
2012
43.4 mm (1.7 in)
2013
82.3 mm (3.2 in)
2014
19.8 mm (0.8 in)
2015
46.7 mm (1.8 in)
2016
71.6 mm (2.8 in)
2017
50.8 mm (2.0 in)
2018
45.7 mm (1.8 in)
2019
51.1 mm (2.0 in)
2020
57.2 mm (2.3 in)
2021
31.2 mm (1.2 in)
2022
35.6 mm (1.4 in)
2023
25.9 mm (1.0 in)
2024
170.2 mm (6.7 in)
2025
54.1 mm (2.1 in)
2026
8.1 mm (0.32 in)
Wettest five days (Rx5day)
The wettest five days of the year at Shonkin 7 S, 1953 to 2026. The record is 247.1 mm (9.7 in) in 1953, marked on the chart; the median year is 80.8 mm (3.2 in).
Wettest five days (Rx5day) at Shonkin 7 S by year
Year
Wettest five days (Rx5day)
1953
247.1 mm (9.7 in)
1954
188.6 mm (7.4 in)
1955
87.1 mm (3.4 in)
1956
77.8 mm (3.1 in)
1957
108.2 mm (4.3 in)
1958
47.7 mm (1.9 in)
1959
156.7 mm (6.2 in)
1960
80.0 mm (3.1 in)
1961
56.6 mm (2.2 in)
1962
143.2 mm (5.6 in)
1963
55.9 mm (2.2 in)
1964
234.4 mm (9.2 in)
1965
118.6 mm (4.7 in)
1966
75.0 mm (3.0 in)
1967
127.8 mm (5.0 in)
1968
136.1 mm (5.4 in)
1969
149.1 mm (5.9 in)
1970
98.3 mm (3.9 in)
1971
85.9 mm (3.4 in)
1972
58.4 mm (2.3 in)
1973
106.6 mm (4.2 in)
1974
127.5 mm (5.0 in)
1975
147.9 mm (5.8 in)
1976
97.0 mm (3.8 in)
1977
99.8 mm (3.9 in)
1978
219.2 mm (8.6 in)
1979
74.7 mm (2.9 in)
1980
81.0 mm (3.2 in)
1981
125.2 mm (4.9 in)
1982
230.4 mm (9.1 in)
1983
95.8 mm (3.8 in)
1984
79.7 mm (3.1 in)
1985
80.5 mm (3.2 in)
1986
102.8 mm (4.0 in)
1987
48.0 mm (1.9 in)
1988
72.9 mm (2.9 in)
1989
80.3 mm (3.2 in)
1990
54.6 mm (2.1 in)
1991
59.7 mm (2.4 in)
1992
71.1 mm (2.8 in)
1993
96.8 mm (3.8 in)
1994
51.6 mm (2.0 in)
1995
74.7 mm (2.9 in)
1996
27.2 mm (1.1 in)
1997
75.9 mm (3.0 in)
1998
79.1 mm (3.1 in)
1999
54.1 mm (2.1 in)
2000
61.8 mm (2.4 in)
2001
65.6 mm (2.6 in)
2002
148.4 mm (5.8 in)
2003
73.4 mm (2.9 in)
2004
97.8 mm (3.9 in)
2005
73.7 mm (2.9 in)
2006
103.4 mm (4.1 in)
2007
102.1 mm (4.0 in)
2008
182.9 mm (7.2 in)
2009
58.7 mm (2.3 in)
2010
128.7 mm (5.1 in)
2011
111.3 mm (4.4 in)
2012
37.1 mm (1.5 in)
2013
156.3 mm (6.2 in)
2014
58.6 mm (2.3 in)
2015
101.0 mm (4.0 in)
2016
99.0 mm (3.9 in)
2017
81.5 mm (3.2 in)
2018
70.3 mm (2.8 in)
2019
64.3 mm (2.5 in)
2020
71.4 mm (2.8 in)
2021
34.6 mm (1.4 in)
2022
48.1 mm (1.9 in)
2023
30.5 mm (1.2 in)
2024
170.2 mm (6.7 in)
2025
54.1 mm (2.1 in)
2026
8.1 mm (0.32 in)
Longest dry spell (CDD)
The longest dry spell of the year at Shonkin 7 S, 1953 to 2026. The record is 60 days in 2005, marked on the chart; the median year is 26 days.
Longest dry spell (CDD) at Shonkin 7 S by year
Year
Longest dry spell (CDD)
1953
33 days
1954
22 days
1955
23 days
1956
26 days
1957
13 days
1958
20 days
1959
43 days
1960
26 days
1961
25 days
1962
31 days
1963
22 days
1964
25 days
1965
48 days
1966
15 days
1967
32 days
1968
18 days
1969
34 days
1970
35 days
1971
25 days
1972
27 days
1973
22 days
1974
29 days
1975
32 days
1976
32 days
1977
27 days
1978
18 days
1979
20 days
1980
22 days
1981
24 days
1982
17 days
1983
32 days
1984
37 days
1985
27 days
1986
21 days
1987
28 days
1988
26 days
1989
17 days
1990
30 days
1991
17 days
1992
31 days
1993
9 days
1994
22 days
1995
19 days
1996
13 days
1997
22 days
1998
35 days
1999
21 days
2000
32 days
2001
30 days
2002
24 days
2003
31 days
2004
24 days
2005
60 days
2006
35 days
2007
30 days
2008
27 days
2009
33 days
2010
25 days
2011
6 days
2012
32 days
2013
22 days
2014
16 days
2015
26 days
2016
32 days
2017
55 days
2018
26 days
2019
27 days
2020
25 days
2021
43 days
2022
37 days
2023
34 days
2024
33 days
2025
24 days
2026
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.
Frost Dates and Growing Season
42 years with a frost
Across 42 years with a frost, the median last spring frost at Shonkin 7 S falls on 24 May and the median first autumn frost on 18 September, which leaves a median of 117 days between them.
Fitted over all years, the growing season changes by +7.7 days per decade at this station.
Frost dates and growing season at Shonkin 7 S
Measure
Median, all years
Earliest period
Recent period (1966 to 2019)
Recent against earliest
Fitted trend
Last spring frost
24 May
n/a
22 May
n/a
-4.1 days per decade
First autumn frost
18 September
n/a
20 September
n/a
+3.6 days per decade
Growing days
117 days
n/a
119 days
n/a
+7.7 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
51 years, 1954 to 2025
A day with at least 59.6 mm (2.3 in) of rain is expected about once in 2 years. A day with at least 185.0 mm (7.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Shonkin 7 S: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
59.6 mm (2.3 in)
5 years
85.8 mm (3.4 in)
10 years
105.8 mm (4.2 in)
25 years
134.5 mm (5.3 in)
50 years
158.5 mm (6.2 in)
100 years
185.0 mm (7.3 in)
Longer than the 51 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, 51 years of values from 1954 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: 170.2 mm (6.7 in) in 2024; 147.3 mm (5.8 in) in 1978; 134.4 mm (5.3 in) in 1962.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Shonkin 7 S standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Shonkin 7 S 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 2026-10-15 (15 October 2026). Records are computed by this site and are not official.