Record envelope, standing records and threshold days for Glen 4 N (USC00243570), Montana, United States, with 54 years of record.
Key Facts for Glen 4 N
Glen 4 N (USC00243570) is a weather station in Montana, United States at 45.53 latitude and -112.70 longitude, 1,541 m (5,054 ft) above sea level.
The station reports from 1958 to 2011, 54 years of record.
1,464 records set at Glen 4 N still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Glen 4 N set a daily record high maximum temperature of 33.3 C (91.9 F) on 28 August 2011.
About the Station
Location: Montana, United States, 45.53 latitude, -112.70 longitude.
Elevation: 1,541 m (5,054 ft).
Period of record: 1958 to 2011, 54 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 Glen 4 N. 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 Glen 4 N, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
17.2 C (63.0 F)
-37.8 C (-36.0 F)
n/a
n/a
Feb
18.3 C (64.9 F)
-39.4 C (-38.9 F)
n/a
n/a
Mar
23.3 C (73.9 F)
-30.6 C (-23.1 F)
n/a
n/a
Apr
28.9 C (84.0 F)
-17.2 C (1.0 F)
n/a
n/a
May
33.3 C (91.9 F)
-11.1 C (12.0 F)
n/a
n/a
Jun
36.1 C (97.0 F)
-3.9 C (25.0 F)
n/a
n/a
Jul
39.4 C (102.9 F)
-2.2 C (28.0 F)
n/a
n/a
Aug
38.9 C (102.0 F)
-3.3 C (26.1 F)
n/a
n/a
Sep
35.0 C (95.0 F)
-11.7 C (10.9 F)
n/a
n/a
Oct
30.0 C (86.0 F)
-23.9 C (-11.0 F)
n/a
n/a
Nov
23.9 C (75.0 F)
-33.9 C (-29.0 F)
n/a
n/a
Dec
15.6 C (60.1 F)
-39.4 C (-38.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Glen 4 N still stand. 1969 holds the most, with 45.
Standing records at Glen 4 N by the year they were set
Year set
Standing records
1958
16
1959
25
1960
30
1961
26
1962
29
1963
30
1964
14
1965
41
1966
35
1967
22
1968
23
1969
45
1970
22
1971
22
1972
39
1973
22
1974
30
1975
34
1976
14
1977
19
1978
24
1979
26
1980
23
1981
15
1982
13
1983
23
1984
27
1985
38
1986
35
1987
31
1988
35
1989
30
1990
24
1991
17
1992
32
1993
22
1994
17
1995
40
1996
44
1997
21
1998
15
1999
41
2000
27
2001
25
2002
32
2003
43
2004
17
2005
26
2006
32
2007
30
2008
25
2009
31
2010
21
2011
24
All-Time Record Progression
6 new records
6 all-time records were set at Glen 4 N between 3 February 1989 and 12 July 2002. Each dot is a new record.
When Glen 4 N set new all-time records
Date
Kind
Detail
1989-02-03
Record low minimum temperature
Record low minimum temperature -38.9 C (-38.0 F)
1989-02-04
Record low minimum temperature
Record low minimum temperature -39.4 C (-38.9 F)
1990-12-20
Record low maximum temperature
Record low maximum temperature -27.8 C (-18.0 F)
1992-08-02
Record high maximum temperature
Record high maximum temperature 38.9 C (102.0 F)
2000-01-11
Record snow depth
Record snow depth 17.8 cm (7.0 in)
2002-07-12
Record high maximum temperature
Record high maximum temperature 39.4 C (102.9 F)
Wettest Day of Each Month
Sep: 41.1 mm (1.6 in)
The wettest day on record for each calendar month at Glen 4 N. The most was 41.1 mm (1.6 in) on 18 September 1976.
Record daily precipitation for each month at Glen 4 N
Month
Record daily precipitation (mm)
Date
Jan
14.0 mm (0.6 in)
11 January 2000
Feb
11.9 mm (0.5 in)
1 February 1963
Mar
15.2 mm (0.6 in)
23 March 2009
Apr
22.1 mm (0.9 in)
6 April 2006
May
37.1 mm (1.5 in)
23 May 1980
Jun
34.5 mm (1.4 in)
16 June 1993
Jul
40.4 mm (1.6 in)
30 July 1975
Aug
23.6 mm (0.9 in)
31 August 1984
Sep
41.1 mm (1.6 in)
18 September 1976
Oct
27.9 mm (1.1 in)
12 October 2000
Nov
14.0 mm (0.6 in)
14 November 1981
Dec
13.2 mm (0.5 in)
23 December 2008
Period of Record Coverage
1958 to 2011
Complete yearUnder 90 percent of days
54 years of record at Glen 4 N, 1958 to 2011. 31 years have data for under 90 percent of days and are left out of rankings: 1958, 1962, 1963, 1976, 1977, 1980, 1981, 1982 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 36 complete years at Glen 4 N, 1959 to 2010. Blue stripes are years cooler than the station's own mean of 6.1 C (42.9 F); red stripes are warmer. The coolest year was 1975, at 4.9 C (40.7 F), and the warmest was 1992, at 7.4 C (45.2 F). The strongest colour marks a difference of 1.3 C (2.3 F).
Annual mean temperature at Glen 4 N as warming stripes, 1959 to 2010
Year
Annual mean temperature
Difference from the station mean
1959
5.8 C
-0.23 C
1961
7.0 C
+0.94 C
1964
5.8 C
-0.26 C
1965
6.1 C
+0.07 C
1967
6.3 C
+0.24 C
1968
5.5 C
-0.60 C
1969
5.2 C
-0.85 C
1970
5.9 C
-0.20 C
1971
5.8 C
-0.22 C
1973
5.3 C
-0.72 C
1974
5.8 C
-0.25 C
1975
4.9 C
-1.20 C
1979
5.3 C
-0.72 C
1983
6.0 C
-0.09 C
1985
4.9 C
-1.17 C
1986
6.8 C
+0.72 C
1988
7.1 C
+1.05 C
1989
5.2 C
-0.83 C
1990
6.8 C
+0.78 C
1992
7.4 C
+1.29 C
1995
5.5 C
-0.53 C
1996
5.4 C
-0.68 C
1997
5.7 C
-0.36 C
1998
6.3 C
+0.28 C
1999
6.4 C
+0.36 C
2000
6.2 C
+0.10 C
2001
6.9 C
+0.82 C
2002
5.8 C
-0.23 C
2003
7.3 C
+1.21 C
2004
6.7 C
+0.62 C
2005
6.4 C
+0.37 C
2006
7.3 C
+1.24 C
2007
7.2 C
+1.10 C
2008
5.5 C
-0.58 C
2009
5.4 C
-0.63 C
2010
5.3 C
-0.79 C
The fitted trend in annual mean temperature here over 1959 to 2010 is 0.11 C (-0.04 to 0.27) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.5) per decade. The slope is a straight line fitted to 36 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Glen 4 N
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.11 C (-0.04 to 0.27) per decade
0.2 F (-0.1 to 0.5) per decade
1959 to 2010
36
Not clearly different from zero
Mean daily maximum
0.4 C (0.2 to 0.6) per decade
0.7 F (0.4 to 1.0) per decade
1959 to 2010
36
Rise
Mean daily minimum
-0.18 C (-0.36 to 0.00) per decade
-0.33 F (-0.66 to 0.00) per decade
1959 to 2010
36
Fall
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
1958 to 2011
Yearly extremes at Glen 4 N: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
39.4 C (102.9 F)
2002
35.0 C (95.0 F)
54
Coldest night (TNn)
-39.4 C (-38.9 F)
1989
-31.1 C (-24.0 F)
54
Wettest day (Rx1day)
41.1 mm (1.6 in)
1976
20.8 mm (0.8 in)
54
Wettest five days (Rx5day)
60.0 mm (2.4 in)
1965
33.5 mm (1.3 in)
54
Longest dry spell (CDD)
98 days
1987
42 days
54
Hottest day (TXx)
The hottest day of the year at Glen 4 N, 1958 to 2011. The record is 39.4 C (102.9 F) in 2002, marked on the chart; the median year is 35.0 C (95.0 F).
Hottest day (TXx) at Glen 4 N by year
Year
Hottest day (TXx)
1958
35.0 C (95.0 F)
1959
34.4 C (93.9 F)
1960
38.3 C (100.9 F)
1961
37.8 C (100.0 F)
1962
32.8 C (91.0 F)
1963
33.9 C (93.0 F)
1964
34.4 C (93.9 F)
1965
32.8 C (91.0 F)
1966
35.0 C (95.0 F)
1967
35.6 C (96.1 F)
1968
35.0 C (95.0 F)
1969
35.6 C (96.1 F)
1970
34.4 C (93.9 F)
1971
33.9 C (93.0 F)
1972
33.9 C (93.0 F)
1973
34.4 C (93.9 F)
1974
34.4 C (93.9 F)
1975
35.0 C (95.0 F)
1976
33.9 C (93.0 F)
1977
31.7 C (89.1 F)
1978
33.9 C (93.0 F)
1979
35.0 C (95.0 F)
1980
34.4 C (93.9 F)
1981
33.3 C (91.9 F)
1982
33.3 C (91.9 F)
1983
36.1 C (97.0 F)
1984
34.4 C (93.9 F)
1985
35.0 C (95.0 F)
1986
35.0 C (95.0 F)
1987
32.8 C (91.0 F)
1988
36.1 C (97.0 F)
1989
35.6 C (96.1 F)
1990
36.7 C (98.1 F)
1991
35.0 C (95.0 F)
1992
38.9 C (102.0 F)
1993
30.0 C (86.0 F)
1994
33.3 C (91.9 F)
1995
34.4 C (93.9 F)
1996
36.1 C (97.0 F)
1997
34.4 C (93.9 F)
1998
36.7 C (98.1 F)
1999
36.1 C (97.0 F)
2000
37.8 C (100.0 F)
2001
36.7 C (98.1 F)
2002
39.4 C (102.9 F)
2003
38.3 C (100.9 F)
2004
35.6 C (96.1 F)
2005
36.1 C (97.0 F)
2006
37.8 C (100.0 F)
2007
38.3 C (100.9 F)
2008
35.6 C (96.1 F)
2009
35.6 C (96.1 F)
2010
35.6 C (96.1 F)
2011
35.0 C (95.0 F)
Coldest night (TNn)
The coldest night of the year at Glen 4 N, 1958 to 2011. The record is -39.4 C (-38.9 F) in 1989, marked on the chart; the median year is -31.1 C (-24.0 F).
Coldest night (TNn) at Glen 4 N by year
Year
Coldest night (TNn)
1958
-21.1 C (-6.0 F)
1959
-33.9 C (-29.0 F)
1960
-28.9 C (-20.0 F)
1961
-30.0 C (-22.0 F)
1962
-37.8 C (-36.0 F)
1963
-33.9 C (-29.0 F)
1964
-35.6 C (-32.1 F)
1965
-26.1 C (-15.0 F)
1966
-25.0 C (-13.0 F)
1967
-29.4 C (-20.9 F)
1968
-30.6 C (-23.1 F)
1969
-36.1 C (-33.0 F)
1970
-30.6 C (-23.1 F)
1971
-27.8 C (-18.0 F)
1972
-36.7 C (-34.1 F)
1973
-33.3 C (-27.9 F)
1974
-35.0 C (-31.0 F)
1975
-30.6 C (-23.1 F)
1976
-28.9 C (-20.0 F)
1977
-28.9 C (-20.0 F)
1978
-35.0 C (-31.0 F)
1979
-37.2 C (-35.0 F)
1980
-24.4 C (-11.9 F)
1981
-33.9 C (-29.0 F)
1982
-31.1 C (-24.0 F)
1983
-38.3 C (-36.9 F)
1984
-36.1 C (-33.0 F)
1985
-34.4 C (-29.9 F)
1986
-22.2 C (-8.0 F)
1987
-26.1 C (-15.0 F)
1988
-27.8 C (-18.0 F)
1989
-39.4 C (-38.9 F)
1990
-39.4 C (-38.9 F)
1991
-27.2 C (-17.0 F)
1992
-28.3 C (-18.9 F)
1993
-33.3 C (-27.9 F)
1994
-32.2 C (-26.0 F)
1995
-30.6 C (-23.1 F)
1996
-37.8 C (-36.0 F)
1997
-31.1 C (-24.0 F)
1998
-33.3 C (-27.9 F)
1999
-27.8 C (-18.0 F)
2000
-25.6 C (-14.1 F)
2001
-23.3 C (-9.9 F)
2002
-30.6 C (-23.1 F)
2003
-31.1 C (-24.0 F)
2004
-35.0 C (-31.0 F)
2005
-31.7 C (-25.1 F)
2006
-30.0 C (-22.0 F)
2007
-28.9 C (-20.0 F)
2008
-33.9 C (-29.0 F)
2009
-33.3 C (-27.9 F)
2010
-34.4 C (-29.9 F)
2011
-31.7 C (-25.1 F)
Wettest day (Rx1day)
The wettest day of the year at Glen 4 N, 1958 to 2011. The record is 41.1 mm (1.6 in) in 1976, marked on the chart; the median year is 20.8 mm (0.8 in).
Wettest day (Rx1day) at Glen 4 N by year
Year
Wettest day (Rx1day)
1958
24.9 mm (1.0 in)
1959
20.8 mm (0.8 in)
1960
18.3 mm (0.7 in)
1961
17.8 mm (0.7 in)
1962
18.8 mm (0.7 in)
1963
19.1 mm (0.8 in)
1964
23.4 mm (0.9 in)
1965
29.7 mm (1.2 in)
1966
26.9 mm (1.1 in)
1967
26.2 mm (1.0 in)
1968
36.6 mm (1.4 in)
1969
24.1 mm (0.9 in)
1970
18.8 mm (0.7 in)
1971
15.5 mm (0.6 in)
1972
21.3 mm (0.8 in)
1973
19.6 mm (0.8 in)
1974
15.2 mm (0.6 in)
1975
40.4 mm (1.6 in)
1976
41.1 mm (1.6 in)
1977
22.9 mm (0.9 in)
1978
24.9 mm (1.0 in)
1979
16.5 mm (0.6 in)
1980
38.1 mm (1.5 in)
1981
14.7 mm (0.6 in)
1982
19.8 mm (0.8 in)
1983
33.8 mm (1.3 in)
1984
23.6 mm (0.9 in)
1985
12.7 mm (0.5 in)
1986
18.5 mm (0.7 in)
1987
27.4 mm (1.1 in)
1988
14.0 mm (0.6 in)
1989
15.7 mm (0.6 in)
1990
20.3 mm (0.8 in)
1991
17.5 mm (0.7 in)
1992
14.7 mm (0.6 in)
1993
34.5 mm (1.4 in)
1994
11.7 mm (0.5 in)
1995
28.4 mm (1.1 in)
1996
11.2 mm (0.4 in)
1997
22.9 mm (0.9 in)
1998
20.8 mm (0.8 in)
1999
21.6 mm (0.9 in)
2000
27.9 mm (1.1 in)
2001
21.6 mm (0.9 in)
2002
16.8 mm (0.7 in)
2003
29.7 mm (1.2 in)
2004
16.0 mm (0.6 in)
2005
22.4 mm (0.9 in)
2006
22.1 mm (0.9 in)
2007
24.6 mm (1.0 in)
2008
15.7 mm (0.6 in)
2009
15.7 mm (0.6 in)
2010
19.1 mm (0.8 in)
2011
20.8 mm (0.8 in)
Wettest five days (Rx5day)
The wettest five days of the year at Glen 4 N, 1958 to 2011. The record is 60.0 mm (2.4 in) in 1965, marked on the chart; the median year is 33.5 mm (1.3 in).
Wettest five days (Rx5day) at Glen 4 N by year
Year
Wettest five days (Rx5day)
1958
38.8 mm (1.5 in)
1959
38.8 mm (1.5 in)
1960
29.2 mm (1.1 in)
1961
25.4 mm (1.0 in)
1962
27.9 mm (1.1 in)
1963
43.0 mm (1.7 in)
1964
50.0 mm (2.0 in)
1965
60.0 mm (2.4 in)
1966
32.0 mm (1.3 in)
1967
56.5 mm (2.2 in)
1968
48.1 mm (1.9 in)
1969
31.2 mm (1.2 in)
1970
26.4 mm (1.0 in)
1971
24.7 mm (1.0 in)
1972
34.6 mm (1.4 in)
1973
27.5 mm (1.1 in)
1974
18.5 mm (0.7 in)
1975
49.0 mm (1.9 in)
1976
44.4 mm (1.7 in)
1977
46.8 mm (1.8 in)
1978
30.9 mm (1.2 in)
1979
30.0 mm (1.2 in)
1980
58.2 mm (2.3 in)
1981
29.4 mm (1.2 in)
1982
33.6 mm (1.3 in)
1983
42.9 mm (1.7 in)
1984
39.8 mm (1.6 in)
1985
27.5 mm (1.1 in)
1986
33.0 mm (1.3 in)
1987
44.9 mm (1.8 in)
1988
27.7 mm (1.1 in)
1989
24.1 mm (0.9 in)
1990
31.0 mm (1.2 in)
1991
33.3 mm (1.3 in)
1992
35.5 mm (1.4 in)
1993
53.4 mm (2.1 in)
1994
22.1 mm (0.9 in)
1995
50.0 mm (2.0 in)
1996
20.3 mm (0.8 in)
1997
34.6 mm (1.4 in)
1998
34.0 mm (1.3 in)
1999
44.5 mm (1.8 in)
2000
38.7 mm (1.5 in)
2001
27.5 mm (1.1 in)
2002
26.4 mm (1.0 in)
2003
33.3 mm (1.3 in)
2004
44.7 mm (1.8 in)
2005
34.5 mm (1.4 in)
2006
31.3 mm (1.2 in)
2007
30.2 mm (1.2 in)
2008
24.9 mm (1.0 in)
2009
30.2 mm (1.2 in)
2010
35.3 mm (1.4 in)
2011
46.7 mm (1.8 in)
Longest dry spell (CDD)
The longest dry spell of the year at Glen 4 N, 1958 to 2011. The record is 98 days in 1987, marked on the chart; the median year is 42 days.
Longest dry spell (CDD) at Glen 4 N by year
Year
Longest dry spell (CDD)
1958
70 days
1959
48 days
1960
63 days
1961
55 days
1962
39 days
1963
41 days
1964
82 days
1965
36 days
1966
80 days
1967
26 days
1968
40 days
1969
54 days
1970
33 days
1971
38 days
1972
40 days
1973
33 days
1974
57 days
1975
34 days
1976
59 days
1977
43 days
1978
38 days
1979
49 days
1980
46 days
1981
39 days
1982
26 days
1983
56 days
1984
33 days
1985
52 days
1986
52 days
1987
98 days
1988
76 days
1989
53 days
1990
61 days
1991
59 days
1992
46 days
1993
39 days
1994
23 days
1995
27 days
1996
40 days
1997
25 days
1998
27 days
1999
53 days
2000
20 days
2001
48 days
2002
50 days
2003
31 days
2004
55 days
2005
36 days
2006
68 days
2007
39 days
2008
46 days
2009
39 days
2010
29 days
2011
3 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
36 years with a frost
Across 36 years with a frost, the median last spring frost at Glen 4 N falls on 8 June and the median first autumn frost on 4 September, which leaves a median of 87 days between them.
Fitted over all years, the growing season changes by -6.5 days per decade at this station.
Frost dates and growing season at Glen 4 N
Measure
Median, all years
Earliest period
Recent period (1969 to 2010)
Recent against earliest
Fitted trend
Last spring frost
8 June
n/a
14 June
n/a
+2.7 days per decade
First autumn frost
4 September
n/a
4 September
n/a
-3.8 days per decade
Growing days
87 days
n/a
85 days
n/a
-6.5 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
45 years, 1960 to 2010
A day with at least 20.5 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 46.1 mm (1.8 in) of rain is expected about once in 100 years.
Rainfall return levels at Glen 4 N: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
20.5 mm (0.8 in)
5 years
26.7 mm (1.1 in)
10 years
31.0 mm (1.2 in)
25 years
36.8 mm (1.4 in)
50 years
41.4 mm (1.6 in)
Longer than the 45 years of record
100 years
46.1 mm (1.8 in)
Longer than the 45 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, 45 years of values from 1960 to 2010.
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: 41.1 mm (1.6 in) in 1976; 40.4 mm (1.6 in) in 1975; 36.6 mm (1.4 in) in 1968.
Download the Data
Data for Glen 4 N standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Glen 4 N 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.