Record envelope, standing records and threshold days for Garrison (USC00323376), North Dakota, United States, with 79 years of record.
Key Facts for Garrison
Garrison (USC00323376) is a weather station in North Dakota, United States at 47.65 latitude and -101.42 longitude, 589 m (1,932 ft) above sea level.
The station reports from 1948 to 2026, 79 years of record.
1,464 records set at Garrison still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Garrison set a daily record high minimum temperature of 19.4 C (66.9 F) on 3 August 2026.
About the Station
Location: North Dakota, United States, 47.65 latitude, -101.42 longitude.
Elevation: 589 m (1,932 ft).
Period of record: 1948 to 2026, 79 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
13 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 Garrison. The lines show the 2026 daily maximum and minimum. 13 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Garrison, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
12.2 C (54.0 F)
-44.4 C (-47.9 F)
6.1 C (43.0 F)
-32.2 C (-26.0 F)
Feb
17.2 C (63.0 F)
-38.3 C (-36.9 F)
10.0 C (50.0 F)
-23.3 C (-9.9 F)
Mar
25.6 C (78.1 F)
-35.0 C (-31.0 F)
22.8 C (73.0 F)
-18.3 C (-0.9 F)
Apr
33.9 C (93.0 F)
-24.4 C (-11.9 F)
29.4 C (84.9 F)
-8.9 C (16.0 F)
May
35.6 C (96.1 F)
-11.1 C (12.0 F)
34.4 C (93.9 F)
-5.0 C (23.0 F)
Jun
38.9 C (102.0 F)
-2.2 C (28.0 F)
33.3 C (91.9 F)
5.6 C (42.1 F)
Jul
40.6 C (105.1 F)
1.7 C (35.1 F)
39.4 C (102.9 F)
11.1 C (52.0 F)
Aug
42.2 C (108.0 F)
-1.7 C (28.9 F)
35.6 C (96.1 F)
7.2 C (45.0 F)
Sep
40.0 C (104.0 F)
-8.3 C (17.1 F)
25.6 C (78.1 F)
3.3 C (37.9 F)
Oct
35.0 C (95.0 F)
-19.4 C (-2.9 F)
24.4 C (75.9 F)
2.2 C (36.0 F)
Nov
23.9 C (75.0 F)
-32.8 C (-27.0 F)
n/a
n/a
Dec
16.1 C (61.0 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 Garrison still stand. 1950 holds the most, with 38.
Standing records at Garrison by the year they were set
Year set
Standing records
1948
13
1949
22
1950
38
1951
27
1952
20
1953
15
1954
19
1955
16
1956
9
1957
13
1958
20
1959
21
1960
11
1961
14
1962
16
1963
27
1964
29
1965
30
1966
23
1967
15
1968
16
1969
18
1971
10
1972
25
1973
11
1974
10
1975
11
1976
11
1977
26
1978
18
1979
19
1980
21
1981
21
1982
27
1983
28
1984
17
1985
30
1986
23
1987
22
1988
33
1989
34
1990
17
1991
35
1992
25
1993
17
1994
19
1995
17
1996
22
1997
22
1998
12
1999
12
2000
22
2001
12
2002
20
2003
20
2004
18
2005
19
2006
13
2007
11
2008
9
2009
19
2010
10
2011
10
2012
30
2013
17
2014
8
2015
14
2016
12
2017
11
2018
11
2019
7
2020
12
2021
30
2022
15
2023
17
2024
20
2025
29
2026
21
All-Time Record Progression
10 new records
10 all-time records were set at Garrison between 10 January 1982 and 16 January 2009. Each dot is a new record.
When Garrison set new all-time records
Date
Kind
Detail
1982-01-10
Record low minimum temperature
Record low minimum temperature -38.9 C (-38.0 F)
1982-01-11
Record low maximum temperature
Record low maximum temperature -29.4 C (-20.9 F)
1982-02-04
Record low maximum temperature
Record low maximum temperature -30.0 C (-22.0 F)
1983-07-10
Record high minimum temperature
Record high minimum temperature 23.3 C (73.9 F)
1983-12-23
Record low maximum temperature
Record low maximum temperature -32.2 C (-26.0 F)
1983-12-23
Record low minimum temperature
Record low minimum temperature -41.1 C (-42.0 F)
1985-06-09
Record high minimum temperature
Record high minimum temperature 26.1 C (79.0 F)
1999-06-07
Record daily precipitation
Record daily precipitation 110.5 mm (4.4 in)
2009-01-15
Record low minimum temperature
Record low minimum temperature -43.9 C (-47.0 F)
2009-01-16
Record low minimum temperature
Record low minimum temperature -44.4 C (-47.9 F)
Wettest Day of Each Month
Jun: 110.5 mm (4.4 in)
The wettest day on record for each calendar month at Garrison. The most was 110.5 mm (4.4 in) on 7 June 1999.
Record daily precipitation for each month at Garrison
Month
Record daily precipitation (mm)
Date
Jan
16.5 mm (0.6 in)
8 January 1949
Feb
37.6 mm (1.5 in)
28 February 1951
Mar
41.4 mm (1.6 in)
23 March 2011
Apr
55.9 mm (2.2 in)
14 April 2022
May
56.6 mm (2.2 in)
31 May 2007
Jun
110.5 mm (4.4 in)
7 June 1999
Jul
75.7 mm (3.0 in)
22 July 1987
Aug
71.9 mm (2.8 in)
12 August 1999
Sep
63.5 mm (2.5 in)
21 September 1955
Oct
53.3 mm (2.1 in)
7 October 1994
Nov
28.4 mm (1.1 in)
11 November 2022
Dec
48.3 mm (1.9 in)
26 December 2016
Period of Record Coverage
1948 to 2026
Complete yearUnder 90 percent of days
78 years of record at Garrison, 1948 to 2026. 11 years have data for under 90 percent of days and are left out of rankings: 1948, 1968, 1969, 1981, 1984, 1985, 1992, 2005 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 55 complete years at Garrison, 1949 to 2025. Blue stripes are years cooler than the station's own mean of 4.7 C (40.5 F); red stripes are warmer. The coolest year was 1950, at 1.7 C (35.0 F), and the warmest was 1987, at 7.1 C (44.8 F). The strongest colour marks a difference of 3.1 C (5.6 F).
Annual mean temperature at Garrison as warming stripes, 1949 to 2025
Year
Annual mean temperature
Difference from the station mean
1949
4.5 C
-0.25 C
1950
1.7 C
-3.09 C
1951
1.9 C
-2.81 C
1952
5.2 C
+0.42 C
1953
5.5 C
+0.78 C
1954
5.1 C
+0.35 C
1955
3.6 C
-1.12 C
1956
4.2 C
-0.55 C
1957
4.7 C
-0.04 C
1958
4.8 C
+0.03 C
1959
4.3 C
-0.49 C
1960
4.6 C
-0.12 C
1963
5.9 C
+1.18 C
1964
4.2 C
-0.55 C
1966
3.7 C
-1.01 C
1971
3.8 C
-0.97 C
1973
4.9 C
+0.12 C
1975
3.9 C
-0.85 C
1976
5.4 C
+0.64 C
1977
5.3 C
+0.59 C
1979
2.9 C
-1.80 C
1982
2.4 C
-2.39 C
1983
4.8 C
+0.08 C
1986
5.5 C
+0.77 C
1987
7.1 C
+2.39 C
1988
5.9 C
+1.11 C
1989
3.9 C
-0.80 C
1990
5.8 C
+1.08 C
1991
5.7 C
+0.91 C
1992
5.1 C
+0.34 C
1993
3.3 C
-1.42 C
1994
3.9 C
-0.81 C
1995
4.0 C
-0.75 C
1996
2.3 C
-2.46 C
1999
5.6 C
+0.84 C
2000
4.6 C
-0.16 C
2001
5.2 C
+0.47 C
2002
4.6 C
-0.19 C
2006
6.2 C
+1.46 C
2007
4.8 C
+0.07 C
2011
4.8 C
+0.09 C
2012
6.7 C
+1.95 C
2013
3.7 C
-1.03 C
2014
3.6 C
-1.12 C
2015
6.1 C
+1.40 C
2016
6.8 C
+2.07 C
2017
5.5 C
+0.71 C
2018
4.5 C
-0.28 C
2019
3.5 C
-1.26 C
2020
6.2 C
+1.46 C
2021
6.7 C
+1.99 C
2022
4.2 C
-0.56 C
2023
5.6 C
+0.86 C
2024
6.5 C
+1.80 C
2025
5.6 C
+0.86 C
The annual mean temperature here has risen by 0.2 C (0.1 to 0.3) per decade over 1949 to 2025. In Fahrenheit: 0.3 F (0.1 to 0.6) per decade. The slope is a straight line fitted to 55 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Garrison
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.2 C (0.1 to 0.3) per decade
0.3 F (0.1 to 0.6) per decade
1949 to 2025
55
Rise
Mean daily maximum
0.15 C (0.00 to 0.31) per decade
0.28 F (0.00 to 0.55) per decade
1949 to 2025
55
Rise
Mean daily minimum
0.2 C (0.1 to 0.3) per decade
0.4 F (0.2 to 0.6) per decade
1949 to 2025
55
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
1948 to 2026
Yearly extremes at Garrison: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.2 C (108.0 F)
1949
37.2 C (99.0 F)
78
Coldest night (TNn)
-44.4 C (-47.9 F)
2009
-33.3 C (-27.9 F)
78
Wettest day (Rx1day)
110.5 mm (4.4 in)
1999
39.8 mm (1.6 in)
78
Wettest five days (Rx5day)
141.9 mm (5.6 in)
1987
59.2 mm (2.3 in)
78
Longest dry spell (CDD)
93 days
1987
34 days
78
Hottest day (TXx)
The hottest day of the year at Garrison, 1948 to 2026. The record is 42.2 C (108.0 F) in 1949, marked on the chart; the median year is 37.2 C (99.0 F).
Hottest day (TXx) at Garrison by year
Year
Hottest day (TXx)
1948
38.3 C (100.9 F)
1949
42.2 C (108.0 F)
1950
35.0 C (95.0 F)
1951
37.2 C (99.0 F)
1952
36.7 C (98.1 F)
1953
36.7 C (98.1 F)
1954
37.8 C (100.0 F)
1955
37.2 C (99.0 F)
1956
36.1 C (97.0 F)
1957
38.3 C (100.9 F)
1958
39.4 C (102.9 F)
1959
38.9 C (102.0 F)
1960
40.0 C (104.0 F)
1961
37.8 C (100.0 F)
1962
35.6 C (96.1 F)
1963
36.7 C (98.1 F)
1964
37.8 C (100.0 F)
1965
36.7 C (98.1 F)
1966
35.6 C (96.1 F)
1967
37.2 C (99.0 F)
1968
37.2 C (99.0 F)
1969
37.8 C (100.0 F)
1971
39.4 C (102.9 F)
1972
36.1 C (97.0 F)
1973
37.8 C (100.0 F)
1974
36.7 C (98.1 F)
1975
39.4 C (102.9 F)
1976
38.3 C (100.9 F)
1977
40.6 C (105.1 F)
1978
40.0 C (104.0 F)
1979
36.7 C (98.1 F)
1980
38.3 C (100.9 F)
1981
39.4 C (102.9 F)
1982
36.1 C (97.0 F)
1983
40.0 C (104.0 F)
1984
37.8 C (100.0 F)
1985
38.3 C (100.9 F)
1986
36.7 C (98.1 F)
1987
35.6 C (96.1 F)
1988
39.4 C (102.9 F)
1989
37.8 C (100.0 F)
1990
34.4 C (93.9 F)
1991
36.7 C (98.1 F)
1992
37.2 C (99.0 F)
1993
32.8 C (91.0 F)
1994
36.1 C (97.0 F)
1995
35.6 C (96.1 F)
1996
37.2 C (99.0 F)
1997
35.6 C (96.1 F)
1998
35.0 C (95.0 F)
1999
37.2 C (99.0 F)
2000
37.8 C (100.0 F)
2001
38.3 C (100.9 F)
2002
37.8 C (100.0 F)
2003
38.9 C (102.0 F)
2004
34.4 C (93.9 F)
2005
36.1 C (97.0 F)
2006
38.3 C (100.9 F)
2007
38.3 C (100.9 F)
2008
35.6 C (96.1 F)
2009
36.7 C (98.1 F)
2010
36.1 C (97.0 F)
2011
34.4 C (93.9 F)
2012
39.4 C (102.9 F)
2013
35.0 C (95.0 F)
2014
33.9 C (93.0 F)
2015
37.8 C (100.0 F)
2016
36.1 C (97.0 F)
2017
38.9 C (102.0 F)
2018
40.0 C (104.0 F)
2019
33.3 C (91.9 F)
2020
36.1 C (97.0 F)
2021
40.0 C (104.0 F)
2022
37.2 C (99.0 F)
2023
35.6 C (96.1 F)
2024
36.7 C (98.1 F)
2025
37.2 C (99.0 F)
2026
39.4 C (102.9 F)
Coldest night (TNn)
The coldest night of the year at Garrison, 1948 to 2026. The record is -44.4 C (-47.9 F) in 2009, marked on the chart; the median year is -33.3 C (-27.9 F).
Coldest night (TNn) at Garrison by year
Year
Coldest night (TNn)
1948
-27.8 C (-18.0 F)
1949
-36.7 C (-34.1 F)
1950
-37.2 C (-35.0 F)
1951
-36.7 C (-34.1 F)
1952
-31.1 C (-24.0 F)
1953
-30.6 C (-23.1 F)
1954
-36.7 C (-34.1 F)
1955
-32.8 C (-27.0 F)
1956
-29.4 C (-20.9 F)
1957
-33.3 C (-27.9 F)
1958
-32.2 C (-26.0 F)
1959
-36.1 C (-33.0 F)
1960
-29.4 C (-20.9 F)
1961
-30.6 C (-23.1 F)
1962
-36.1 C (-33.0 F)
1963
-32.8 C (-27.0 F)
1964
-31.1 C (-24.0 F)
1965
-35.6 C (-32.1 F)
1966
-37.2 C (-35.0 F)
1967
-36.1 C (-33.0 F)
1968
-32.8 C (-27.0 F)
1969
-32.2 C (-26.0 F)
1971
-33.3 C (-27.9 F)
1972
-36.1 C (-33.0 F)
1973
-32.8 C (-27.0 F)
1974
-34.4 C (-29.9 F)
1975
-31.1 C (-24.0 F)
1976
-33.3 C (-27.9 F)
1977
-35.0 C (-31.0 F)
1978
-34.4 C (-29.9 F)
1979
-36.7 C (-34.1 F)
1980
-33.3 C (-27.9 F)
1981
-33.3 C (-27.9 F)
1982
-38.9 C (-38.0 F)
1983
-41.1 C (-42.0 F)
1984
-33.9 C (-29.0 F)
1985
-32.8 C (-27.0 F)
1986
-38.3 C (-36.9 F)
1987
-23.3 C (-9.9 F)
1988
-32.8 C (-27.0 F)
1989
-37.2 C (-35.0 F)
1990
-36.1 C (-33.0 F)
1991
-30.6 C (-23.1 F)
1992
-31.7 C (-25.1 F)
1993
-34.4 C (-29.9 F)
1994
-37.2 C (-35.0 F)
1995
-33.9 C (-29.0 F)
1996
-37.8 C (-36.0 F)
1997
-33.3 C (-27.9 F)
1998
-32.8 C (-27.0 F)
1999
-33.3 C (-27.9 F)
2000
-32.2 C (-26.0 F)
2001
-30.0 C (-22.0 F)
2002
-32.2 C (-26.0 F)
2003
-35.0 C (-31.0 F)
2004
-36.1 C (-33.0 F)
2005
-26.1 C (-15.0 F)
2006
-31.1 C (-24.0 F)
2007
-33.9 C (-29.0 F)
2008
-35.6 C (-32.1 F)
2009
-44.4 C (-47.9 F)
2010
-37.2 C (-35.0 F)
2011
-31.1 C (-24.0 F)
2012
-27.8 C (-18.0 F)
2013
-33.9 C (-29.0 F)
2014
-31.1 C (-24.0 F)
2015
-31.7 C (-25.1 F)
2016
-31.7 C (-25.1 F)
2017
-33.3 C (-27.9 F)
2018
-33.3 C (-27.9 F)
2019
-36.7 C (-34.1 F)
2020
-30.6 C (-23.1 F)
2021
-36.1 C (-33.0 F)
2022
-32.8 C (-27.0 F)
2023
-31.1 C (-24.0 F)
2024
-34.4 C (-29.9 F)
2025
-37.8 C (-36.0 F)
2026
-32.2 C (-26.0 F)
Wettest day (Rx1day)
The wettest day of the year at Garrison, 1948 to 2026. The record is 110.5 mm (4.4 in) in 1999, marked on the chart; the median year is 39.8 mm (1.6 in).
Wettest day (Rx1day) at Garrison by year
Year
Wettest day (Rx1day)
1948
58.2 mm (2.3 in)
1949
29.5 mm (1.2 in)
1950
27.9 mm (1.1 in)
1951
37.6 mm (1.5 in)
1952
32.3 mm (1.3 in)
1953
31.0 mm (1.2 in)
1954
37.6 mm (1.5 in)
1955
63.5 mm (2.5 in)
1956
28.2 mm (1.1 in)
1957
24.4 mm (1.0 in)
1958
48.8 mm (1.9 in)
1959
51.1 mm (2.0 in)
1960
45.7 mm (1.8 in)
1961
32.8 mm (1.3 in)
1962
36.6 mm (1.4 in)
1963
28.4 mm (1.1 in)
1964
39.6 mm (1.6 in)
1965
34.3 mm (1.4 in)
1966
75.9 mm (3.0 in)
1967
39.6 mm (1.6 in)
1968
53.6 mm (2.1 in)
1969
35.1 mm (1.4 in)
1971
39.1 mm (1.5 in)
1972
29.5 mm (1.2 in)
1973
42.4 mm (1.7 in)
1974
21.3 mm (0.8 in)
1975
40.4 mm (1.6 in)
1976
36.3 mm (1.4 in)
1977
43.7 mm (1.7 in)
1978
42.7 mm (1.7 in)
1979
41.4 mm (1.6 in)
1980
28.2 mm (1.1 in)
1981
30.2 mm (1.2 in)
1982
43.7 mm (1.7 in)
1983
29.0 mm (1.1 in)
1984
38.1 mm (1.5 in)
1985
22.9 mm (0.9 in)
1986
36.3 mm (1.4 in)
1987
75.7 mm (3.0 in)
1988
21.3 mm (0.8 in)
1989
53.3 mm (2.1 in)
1990
40.9 mm (1.6 in)
1991
38.1 mm (1.5 in)
1992
21.6 mm (0.9 in)
1993
46.2 mm (1.8 in)
1994
53.3 mm (2.1 in)
1995
28.7 mm (1.1 in)
1996
22.4 mm (0.9 in)
1997
40.9 mm (1.6 in)
1998
39.9 mm (1.6 in)
1999
110.5 mm (4.4 in)
2000
37.6 mm (1.5 in)
2001
23.4 mm (0.9 in)
2002
48.0 mm (1.9 in)
2003
71.9 mm (2.8 in)
2004
53.8 mm (2.1 in)
2005
69.9 mm (2.8 in)
2006
30.7 mm (1.2 in)
2007
68.8 mm (2.7 in)
2008
27.2 mm (1.1 in)
2009
42.7 mm (1.7 in)
2010
54.9 mm (2.2 in)
2011
41.4 mm (1.6 in)
2012
33.3 mm (1.3 in)
2013
50.3 mm (2.0 in)
2014
50.8 mm (2.0 in)
2015
67.3 mm (2.6 in)
2016
48.3 mm (1.9 in)
2017
26.4 mm (1.0 in)
2018
58.4 mm (2.3 in)
2019
59.2 mm (2.3 in)
2020
61.2 mm (2.4 in)
2021
34.3 mm (1.4 in)
2022
55.9 mm (2.2 in)
2023
34.3 mm (1.4 in)
2024
47.2 mm (1.9 in)
2025
43.7 mm (1.7 in)
2026
19.8 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Garrison, 1948 to 2026. The record is 141.9 mm (5.6 in) in 1987, marked on the chart; the median year is 59.2 mm (2.3 in).
Wettest five days (Rx5day) at Garrison by year
Year
Wettest five days (Rx5day)
1948
68.8 mm (2.7 in)
1949
60.2 mm (2.4 in)
1950
39.1 mm (1.5 in)
1951
39.4 mm (1.6 in)
1952
70.7 mm (2.8 in)
1953
55.1 mm (2.2 in)
1954
56.9 mm (2.2 in)
1955
63.5 mm (2.5 in)
1956
59.7 mm (2.4 in)
1957
34.1 mm (1.3 in)
1958
114.5 mm (4.5 in)
1959
91.8 mm (3.6 in)
1960
85.0 mm (3.3 in)
1961
35.4 mm (1.4 in)
1962
53.9 mm (2.1 in)
1963
45.0 mm (1.8 in)
1964
73.6 mm (2.9 in)
1965
54.9 mm (2.2 in)
1966
94.9 mm (3.7 in)
1967
54.4 mm (2.1 in)
1968
61.7 mm (2.4 in)
1969
71.5 mm (2.8 in)
1971
55.9 mm (2.2 in)
1972
40.4 mm (1.6 in)
1973
58.7 mm (2.3 in)
1974
35.8 mm (1.4 in)
1975
56.9 mm (2.2 in)
1976
40.6 mm (1.6 in)
1977
76.2 mm (3.0 in)
1978
67.1 mm (2.6 in)
1979
41.9 mm (1.6 in)
1980
34.6 mm (1.4 in)
1981
39.5 mm (1.6 in)
1982
79.8 mm (3.1 in)
1983
49.3 mm (1.9 in)
1984
62.5 mm (2.5 in)
1985
52.6 mm (2.1 in)
1986
66.8 mm (2.6 in)
1987
141.9 mm (5.6 in)
1988
33.0 mm (1.3 in)
1989
56.1 mm (2.2 in)
1990
66.4 mm (2.6 in)
1991
51.3 mm (2.0 in)
1992
29.7 mm (1.2 in)
1993
85.3 mm (3.4 in)
1994
76.2 mm (3.0 in)
1995
51.6 mm (2.0 in)
1996
30.5 mm (1.2 in)
1997
69.8 mm (2.7 in)
1998
68.7 mm (2.7 in)
1999
126.7 mm (5.0 in)
2000
69.2 mm (2.7 in)
2001
44.7 mm (1.8 in)
2002
67.3 mm (2.6 in)
2003
71.9 mm (2.8 in)
2004
56.8 mm (2.2 in)
2005
123.7 mm (4.9 in)
2006
41.4 mm (1.6 in)
2007
84.3 mm (3.3 in)
2008
52.8 mm (2.1 in)
2009
48.3 mm (1.9 in)
2010
81.3 mm (3.2 in)
2011
49.9 mm (2.0 in)
2012
44.5 mm (1.8 in)
2013
85.9 mm (3.4 in)
2014
119.8 mm (4.7 in)
2015
72.6 mm (2.9 in)
2016
50.8 mm (2.0 in)
2017
35.3 mm (1.4 in)
2018
99.8 mm (3.9 in)
2019
61.0 mm (2.4 in)
2020
98.1 mm (3.9 in)
2021
63.6 mm (2.5 in)
2022
110.8 mm (4.4 in)
2023
49.9 mm (2.0 in)
2024
52.8 mm (2.1 in)
2025
82.3 mm (3.2 in)
2026
51.6 mm (2.0 in)
Longest dry spell (CDD)
The longest dry spell of the year at Garrison, 1948 to 2026. The record is 93 days in 1987, marked on the chart; the median year is 34 days.
Longest dry spell (CDD) at Garrison by year
Year
Longest dry spell (CDD)
1948
45 days
1949
32 days
1950
30 days
1951
31 days
1952
46 days
1953
32 days
1954
67 days
1955
29 days
1956
34 days
1957
28 days
1958
32 days
1959
46 days
1960
46 days
1961
73 days
1962
20 days
1963
46 days
1964
40 days
1965
44 days
1966
36 days
1967
25 days
1968
43 days
1969
32 days
1971
54 days
1972
26 days
1973
26 days
1974
29 days
1975
38 days
1976
51 days
1977
34 days
1978
35 days
1979
41 days
1980
29 days
1981
42 days
1982
27 days
1983
30 days
1984
37 days
1985
41 days
1986
43 days
1987
93 days
1988
33 days
1989
30 days
1990
71 days
1991
53 days
1992
53 days
1993
38 days
1994
47 days
1995
27 days
1996
26 days
1997
40 days
1998
49 days
1999
36 days
2000
28 days
2001
38 days
2002
30 days
2003
38 days
2004
26 days
2005
28 days
2006
54 days
2007
25 days
2008
22 days
2009
54 days
2010
24 days
2011
35 days
2012
25 days
2013
28 days
2014
33 days
2015
33 days
2016
44 days
2017
34 days
2018
23 days
2019
35 days
2020
30 days
2021
34 days
2022
37 days
2023
41 days
2024
32 days
2025
22 days
2026
21 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
55 years with a frost
Across 55 years with a frost, the median last spring frost at Garrison falls on 14 May and the median first autumn frost on 21 September, which leaves a median of 132 days between them.
Fitted over all years, the growing season changes by +3.2 days per decade at this station.
Frost dates and growing season at Garrison
Measure
Median, all years
Earliest period
Recent period (1988 to 2025)
Recent against earliest
Fitted trend
Last spring frost
14 May
n/a
13 May
n/a
-0.8 days per decade
First autumn frost
21 September
n/a
27 September
n/a
+2.4 days per decade
Growing days
132 days
n/a
139 days
n/a
+3.2 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
67 years, 1949 to 2025
A day with at least 39.6 mm (1.6 in) of rain is expected about once in 2 years. A day with at least 92.9 mm (3.7 in) of rain is expected about once in 100 years.
Rainfall return levels at Garrison: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
39.6 mm (1.6 in)
5 years
52.9 mm (2.1 in)
10 years
62.1 mm (2.4 in)
25 years
74.1 mm (2.9 in)
50 years
83.4 mm (3.3 in)
100 years
92.9 mm (3.7 in)
Longer than the 67 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, 67 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: 110.5 mm (4.4 in) in 1999; 75.9 mm (3.0 in) in 1966; 75.7 mm (3.0 in) in 1987.
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, Garrison had a mean temperature of 5.3 C (41.6 F) and 465.5 mm (18.3 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Edgeley 3WNW (United States, 247 km away), Summit 1 W (United States, 424 km away) and Mandan Exp STN (United States, 101 km away).
Climate twins of Garrison: 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 Garrison standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Garrison 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.