Record envelope, standing records and threshold days for Judith Gap 13 E (USC00244545), Montana, United States, with 58 years of record.
Key Facts for Judith Gap 13 E
Judith Gap 13 E (USC00244545) is a weather station in Montana, United States at 46.61 latitude and -109.47 longitude, 1,460 m (4,791 ft) above sea level.
The station reports from 1964 to 2021, 58 years of record.
1,464 records set at Judith Gap 13 E still stand.
Records are tracked for tmax, tmin, prcp, snow: an element needs 30 years of data to be eligible.
Judith Gap 13 E set a daily record high maximum temperature of 15.6 C (60.1 F) on 3 February 2021.
About the Station
Location: Montana, United States, 46.61 latitude, -109.47 longitude.
Elevation: 1,460 m (4,791 ft).
Period of record: 1964 to 2021, 58 years.
Eligible elements: tmax, tmin, prcp, snow.
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 Judith Gap 13 E. 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 Judith Gap 13 E, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.3 C (64.9 F)
-37.2 C (-35.0 F)
n/a
n/a
Feb
19.4 C (66.9 F)
-42.2 C (-44.0 F)
n/a
n/a
Mar
22.2 C (72.0 F)
-35.0 C (-31.0 F)
n/a
n/a
Apr
27.2 C (81.0 F)
-21.7 C (-7.1 F)
n/a
n/a
May
30.6 C (87.1 F)
-12.2 C (10.0 F)
n/a
n/a
Jun
34.4 C (93.9 F)
-5.6 C (21.9 F)
n/a
n/a
Jul
36.7 C (98.1 F)
-1.1 C (30.0 F)
n/a
n/a
Aug
36.7 C (98.1 F)
-3.9 C (25.0 F)
n/a
n/a
Sep
35.0 C (95.0 F)
-12.2 C (10.0 F)
n/a
n/a
Oct
31.1 C (88.0 F)
-23.3 C (-9.9 F)
n/a
n/a
Nov
23.9 C (75.0 F)
-31.1 C (-24.0 F)
n/a
n/a
Dec
19.4 C (66.9 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 Judith Gap 13 E still stand. 2020 holds the most, with 70.
Standing records at Judith Gap 13 E by the year they were set
Year set
Standing records
1964
5
1965
33
1966
22
1967
13
1968
31
1969
36
1970
16
1971
15
1972
41
1973
20
1974
27
1975
24
1976
13
1977
23
1978
21
1979
18
1980
36
1981
25
1982
26
1983
38
1984
22
1985
40
1986
27
1987
27
1988
23
1989
19
1990
21
1991
17
1992
48
1993
32
1994
23
1995
28
1996
44
1997
23
1998
20
1999
19
2000
23
2001
20
2002
27
2003
35
2004
23
2007
21
2008
15
2009
31
2010
14
2011
23
2012
28
2013
21
2014
28
2015
28
2016
18
2017
33
2018
17
2019
66
2020
70
2021
7
All-Time Record Progression
1 new records
1 all-time records were set at Judith Gap 13 E between 30 June 2010 and 30 June 2010. Each dot is a new record.
When Judith Gap 13 E set new all-time records
Date
Kind
Detail
2010-06-30
Record daily precipitation
Record daily precipitation 100.3 mm (3.9 in)
Wettest Day of Each Month
Jun: 100.3 mm (3.9 in)
The wettest day on record for each calendar month at Judith Gap 13 E. The most was 100.3 mm (3.9 in) on 30 June 2010.
Record daily precipitation for each month at Judith Gap 13 E
Month
Record daily precipitation (mm)
Date
Jan
17.8 mm (0.7 in)
9 January 1971
Feb
22.9 mm (0.9 in)
25 February 2014
Mar
29.7 mm (1.2 in)
11 March 2014
Apr
31.8 mm (1.3 in)
21 April 2019
May
79.2 mm (3.1 in)
7 May 1988
Jun
100.3 mm (3.9 in)
30 June 2010
Jul
38.1 mm (1.5 in)
17 July 1987
Aug
47.0 mm (1.9 in)
9 August 2002
Sep
41.4 mm (1.6 in)
6 September 1970
Oct
33.5 mm (1.3 in)
3 October 2016
Nov
16.5 mm (0.6 in)
12 November 2009
Dec
17.8 mm (0.7 in)
2 December 1977
Period of Record Coverage
1964 to 2021
Complete yearUnder 90 percent of days
56 years of record at Judith Gap 13 E, 1964 to 2021. 16 years have data for under 90 percent of days and are left out of rankings: 1964, 1967, 1973, 1987, 1988, 1989, 1990, 1992 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 40 complete years at Judith Gap 13 E, 1965 to 2019. Blue stripes are years cooler than the station's own mean of 5.2 C (41.3 F); red stripes are warmer. The coolest year was 1978, at 3.5 C (38.2 F), and the warmest was 2019, at 8.0 C (46.5 F). The strongest colour marks a difference of 2.9 C (5.2 F).
Annual mean temperature at Judith Gap 13 E as warming stripes, 1965 to 2019
Year
Annual mean temperature
Difference from the station mean
1965
4.5 C
-0.72 C
1966
5.0 C
-0.21 C
1968
4.6 C
-0.57 C
1969
4.7 C
-0.45 C
1970
4.5 C
-0.66 C
1971
4.7 C
-0.53 C
1972
4.3 C
-0.86 C
1975
3.6 C
-1.58 C
1977
5.0 C
-0.14 C
1978
3.5 C
-1.72 C
1979
4.7 C
-0.45 C
1980
5.5 C
+0.30 C
1982
3.9 C
-1.28 C
1983
5.5 C
+0.31 C
1984
5.3 C
+0.14 C
1985
4.0 C
-1.16 C
1986
5.5 C
+0.33 C
1987
6.1 C
+0.94 C
1990
5.4 C
+0.20 C
1991
5.7 C
+0.50 C
1993
3.8 C
-1.39 C
1995
4.9 C
-0.24 C
1996
3.6 C
-1.59 C
1997
4.9 C
-0.31 C
1998
6.2 C
+0.98 C
1999
6.5 C
+1.34 C
2000
5.6 C
+0.43 C
2001
6.2 C
+1.02 C
2002
4.7 C
-0.45 C
2003
6.0 C
+0.79 C
2008
5.0 C
-0.15 C
2009
4.9 C
-0.30 C
2010
5.3 C
+0.07 C
2011
5.0 C
-0.21 C
2012
6.6 C
+1.41 C
2013
5.6 C
+0.43 C
2014
5.1 C
-0.10 C
2015
6.9 C
+1.71 C
2017
6.4 C
+1.21 C
2019
8.0 C
+2.86 C
The annual mean temperature here has risen by 0.3 C (0.2 to 0.5) per decade over 1965 to 2019. In Fahrenheit: 0.6 F (0.3 to 0.9) per decade. The slope is a straight line fitted to 40 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Judith Gap 13 E
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.3 C (0.2 to 0.5) per decade
0.6 F (0.3 to 0.9) per decade
1965 to 2019
40
Rise
Mean daily maximum
0.4 C (0.2 to 0.5) per decade
0.6 F (0.3 to 1.0) per decade
1965 to 2019
40
Rise
Mean daily minimum
0.3 C (0.2 to 0.5) per decade
0.6 F (0.3 to 0.9) per decade
1965 to 2019
40
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
1964 to 2021
Yearly extremes at Judith Gap 13 E: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
36.7 C (98.1 F)
1983
32.8 C (91.0 F)
56
Coldest night (TNn)
-42.2 C (-44.0 F)
1989
-31.7 C (-25.1 F)
56
Wettest day (Rx1day)
100.3 mm (3.9 in)
2010
30.5 mm (1.2 in)
56
Wettest five days (Rx5day)
110.5 mm (4.4 in)
2010
48.6 mm (1.9 in)
56
Longest dry spell (CDD)
72 days
1974
32 days
56
Hottest day (TXx)
The hottest day of the year at Judith Gap 13 E, 1964 to 2021. The record is 36.7 C (98.1 F) in 1983, marked on the chart; the median year is 32.8 C (91.0 F).
Hottest day (TXx) at Judith Gap 13 E by year
Year
Hottest day (TXx)
1964
20.0 C (68.0 F)
1965
31.1 C (88.0 F)
1966
33.9 C (93.0 F)
1967
27.2 C (81.0 F)
1968
29.4 C (84.9 F)
1969
34.4 C (93.9 F)
1970
32.2 C (90.0 F)
1971
32.2 C (90.0 F)
1972
29.4 C (84.9 F)
1973
32.8 C (91.0 F)
1974
30.0 C (86.0 F)
1975
34.4 C (93.9 F)
1976
32.8 C (91.0 F)
1977
29.4 C (84.9 F)
1978
29.4 C (84.9 F)
1979
32.8 C (91.0 F)
1980
32.8 C (91.0 F)
1981
31.7 C (89.1 F)
1982
29.4 C (84.9 F)
1983
36.7 C (98.1 F)
1984
34.4 C (93.9 F)
1985
33.9 C (93.0 F)
1986
31.7 C (89.1 F)
1987
32.2 C (90.0 F)
1988
33.9 C (93.0 F)
1989
32.8 C (91.0 F)
1990
33.3 C (91.9 F)
1991
32.8 C (91.0 F)
1992
31.1 C (88.0 F)
1993
33.3 C (91.9 F)
1994
32.2 C (90.0 F)
1995
32.8 C (91.0 F)
1996
33.3 C (91.9 F)
1997
29.4 C (84.9 F)
1998
32.8 C (91.0 F)
1999
34.4 C (93.9 F)
2000
33.9 C (93.0 F)
2001
33.3 C (91.9 F)
2002
36.7 C (98.1 F)
2003
36.7 C (98.1 F)
2004
31.7 C (89.1 F)
2007
35.6 C (96.1 F)
2008
34.4 C (93.9 F)
2009
32.2 C (90.0 F)
2010
32.8 C (91.0 F)
2011
33.9 C (93.0 F)
2012
33.3 C (91.9 F)
2013
31.7 C (89.1 F)
2014
32.2 C (90.0 F)
2015
33.3 C (91.9 F)
2016
34.4 C (93.9 F)
2017
35.6 C (96.1 F)
2018
33.3 C (91.9 F)
2019
33.9 C (93.0 F)
2020
36.1 C (97.0 F)
2021
15.6 C (60.1 F)
Coldest night (TNn)
The coldest night of the year at Judith Gap 13 E, 1964 to 2021. The record is -42.2 C (-44.0 F) in 1989, marked on the chart; the median year is -31.7 C (-25.1 F).
Coldest night (TNn) at Judith Gap 13 E by year
Year
Coldest night (TNn)
1964
-36.7 C (-34.1 F)
1965
-31.7 C (-25.1 F)
1966
-34.4 C (-29.9 F)
1967
-29.4 C (-20.9 F)
1968
-36.1 C (-33.0 F)
1969
-35.6 C (-32.1 F)
1970
-27.2 C (-17.0 F)
1971
-29.4 C (-20.9 F)
1972
-36.7 C (-34.1 F)
1973
-31.1 C (-24.0 F)
1974
-34.4 C (-29.9 F)
1975
-30.6 C (-23.1 F)
1976
-30.0 C (-22.0 F)
1977
-31.7 C (-25.1 F)
1978
-34.4 C (-29.9 F)
1979
-31.7 C (-25.1 F)
1980
-33.3 C (-27.9 F)
1981
-31.7 C (-25.1 F)
1982
-35.6 C (-32.1 F)
1983
-39.4 C (-38.9 F)
1984
-30.0 C (-22.0 F)
1985
-32.8 C (-27.0 F)
1986
-29.4 C (-20.9 F)
1987
-28.9 C (-20.0 F)
1988
-28.9 C (-20.0 F)
1989
-42.2 C (-44.0 F)
1990
-37.2 C (-35.0 F)
1991
-30.6 C (-23.1 F)
1992
-30.0 C (-22.0 F)
1993
-32.2 C (-26.0 F)
1994
-36.7 C (-34.1 F)
1995
-31.1 C (-24.0 F)
1996
-37.2 C (-35.0 F)
1997
-37.2 C (-35.0 F)
1998
-31.7 C (-25.1 F)
1999
-16.1 C (3.0 F)
2000
-32.2 C (-26.0 F)
2001
-27.2 C (-17.0 F)
2002
-23.9 C (-11.0 F)
2003
-32.8 C (-27.0 F)
2004
-28.3 C (-18.9 F)
2007
-24.4 C (-11.9 F)
2008
-33.9 C (-29.0 F)
2009
-30.6 C (-23.1 F)
2010
-32.2 C (-26.0 F)
2011
-32.2 C (-26.0 F)
2012
-26.7 C (-16.1 F)
2013
-31.7 C (-25.1 F)
2014
-35.0 C (-31.0 F)
2015
-28.9 C (-20.0 F)
2016
-33.3 C (-27.9 F)
2017
-28.9 C (-20.0 F)
2018
-21.7 C (-7.1 F)
2019
-32.2 C (-26.0 F)
2020
-21.7 C (-7.1 F)
2021
-11.7 C (10.9 F)
Wettest day (Rx1day)
The wettest day of the year at Judith Gap 13 E, 1964 to 2021. The record is 100.3 mm (3.9 in) in 2010, marked on the chart; the median year is 30.5 mm (1.2 in).
Wettest day (Rx1day) at Judith Gap 13 E by year
Year
Wettest day (Rx1day)
1964
9.4 mm (0.37 in)
1965
72.4 mm (2.9 in)
1966
16.5 mm (0.6 in)
1967
45.7 mm (1.8 in)
1968
26.7 mm (1.1 in)
1969
29.7 mm (1.2 in)
1970
41.4 mm (1.6 in)
1971
31.8 mm (1.3 in)
1972
32.5 mm (1.3 in)
1973
33.5 mm (1.3 in)
1974
30.5 mm (1.2 in)
1975
48.3 mm (1.9 in)
1976
22.4 mm (0.9 in)
1977
28.7 mm (1.1 in)
1978
38.6 mm (1.5 in)
1979
20.3 mm (0.8 in)
1980
48.3 mm (1.9 in)
1981
29.7 mm (1.2 in)
1982
26.7 mm (1.1 in)
1983
10.2 mm (0.4 in)
1984
15.7 mm (0.6 in)
1985
42.7 mm (1.7 in)
1986
44.7 mm (1.8 in)
1987
38.1 mm (1.5 in)
1988
79.2 mm (3.1 in)
1989
37.1 mm (1.5 in)
1990
34.8 mm (1.4 in)
1991
30.5 mm (1.2 in)
1992
42.7 mm (1.7 in)
1993
25.4 mm (1.0 in)
1994
25.4 mm (1.0 in)
1995
29.5 mm (1.2 in)
1996
22.9 mm (0.9 in)
1997
48.3 mm (1.9 in)
1998
28.4 mm (1.1 in)
1999
19.1 mm (0.8 in)
2000
18.3 mm (0.7 in)
2001
27.9 mm (1.1 in)
2002
47.0 mm (1.9 in)
2003
23.9 mm (0.9 in)
2004
25.4 mm (1.0 in)
2007
38.1 mm (1.5 in)
2008
35.6 mm (1.4 in)
2009
16.5 mm (0.6 in)
2010
100.3 mm (3.9 in)
2011
46.0 mm (1.8 in)
2012
19.3 mm (0.8 in)
2013
29.0 mm (1.1 in)
2014
39.4 mm (1.6 in)
2015
27.2 mm (1.1 in)
2016
33.5 mm (1.3 in)
2017
35.6 mm (1.4 in)
2018
42.4 mm (1.7 in)
2019
31.8 mm (1.3 in)
2020
30.5 mm (1.2 in)
2021
10.2 mm (0.4 in)
Wettest five days (Rx5day)
The wettest five days of the year at Judith Gap 13 E, 1964 to 2021. The record is 110.5 mm (4.4 in) in 2010, marked on the chart; the median year is 48.6 mm (1.9 in).
Wettest five days (Rx5day) at Judith Gap 13 E by year
Year
Wettest five days (Rx5day)
1964
15.5 mm (0.6 in)
1965
78.9 mm (3.1 in)
1966
30.7 mm (1.2 in)
1967
79.0 mm (3.1 in)
1968
53.9 mm (2.1 in)
1969
49.1 mm (1.9 in)
1970
51.6 mm (2.0 in)
1971
63.3 mm (2.5 in)
1972
42.4 mm (1.7 in)
1973
45.8 mm (1.8 in)
1974
69.4 mm (2.7 in)
1975
54.9 mm (2.2 in)
1976
44.0 mm (1.7 in)
1977
38.1 mm (1.5 in)
1978
61.7 mm (2.4 in)
1979
35.0 mm (1.4 in)
1980
50.1 mm (2.0 in)
1981
41.9 mm (1.6 in)
1982
40.4 mm (1.6 in)
1983
23.1 mm (0.9 in)
1984
28.2 mm (1.1 in)
1985
63.5 mm (2.5 in)
1986
62.5 mm (2.5 in)
1987
57.6 mm (2.3 in)
1988
89.4 mm (3.5 in)
1989
47.8 mm (1.9 in)
1990
39.4 mm (1.6 in)
1991
70.7 mm (2.8 in)
1992
79.2 mm (3.1 in)
1993
50.6 mm (2.0 in)
1994
49.2 mm (1.9 in)
1995
42.4 mm (1.7 in)
1996
38.2 mm (1.5 in)
1997
83.3 mm (3.3 in)
1998
48.0 mm (1.9 in)
1999
34.5 mm (1.4 in)
2000
37.6 mm (1.5 in)
2001
46.0 mm (1.8 in)
2002
52.1 mm (2.1 in)
2003
29.7 mm (1.2 in)
2004
46.3 mm (1.8 in)
2007
54.6 mm (2.1 in)
2008
84.0 mm (3.3 in)
2009
31.7 mm (1.2 in)
2010
110.5 mm (4.4 in)
2011
79.8 mm (3.1 in)
2012
27.1 mm (1.1 in)
2013
66.4 mm (2.6 in)
2014
72.4 mm (2.9 in)
2015
70.6 mm (2.8 in)
2016
46.2 mm (1.8 in)
2017
39.4 mm (1.6 in)
2018
65.8 mm (2.6 in)
2019
44.2 mm (1.7 in)
2020
40.7 mm (1.6 in)
2021
10.2 mm (0.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Judith Gap 13 E, 1964 to 2021. The record is 72 days in 1974, marked on the chart; the median year is 32 days.
Longest dry spell (CDD) at Judith Gap 13 E by year
Year
Longest dry spell (CDD)
1964
18 days
1965
26 days
1966
35 days
1967
35 days
1968
44 days
1969
37 days
1970
32 days
1971
58 days
1972
63 days
1973
44 days
1974
72 days
1975
32 days
1976
32 days
1977
39 days
1978
25 days
1979
38 days
1980
29 days
1981
43 days
1982
59 days
1983
29 days
1984
19 days
1985
32 days
1986
27 days
1987
53 days
1988
33 days
1989
29 days
1990
42 days
1991
29 days
1992
45 days
1993
25 days
1994
27 days
1995
19 days
1996
26 days
1997
30 days
1998
32 days
1999
38 days
2000
36 days
2001
35 days
2002
28 days
2003
28 days
2004
27 days
2007
23 days
2008
24 days
2009
21 days
2010
23 days
2011
34 days
2012
31 days
2013
22 days
2014
27 days
2015
49 days
2016
35 days
2017
29 days
2018
44 days
2019
34 days
2020
30 days
2021
17 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
40 years with a frost
Across 40 years with a frost, the median last spring frost at Judith Gap 13 E falls on 10 June and the median first autumn frost on 6 September, which leaves a median of 83 days between them.
Fitted over all years, the growing season changes by +9.6 days per decade at this station.
Frost dates and growing season at Judith Gap 13 E
Measure
Median, all years
Earliest period
Recent period (1979 to 2019)
Recent against earliest
Fitted trend
Last spring frost
10 June
n/a
10 June
n/a
-1.8 days per decade
First autumn frost
6 September
n/a
12 September
n/a
+7.8 days per decade
Growing days
83 days
n/a
91 days
n/a
+9.6 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
49 years, 1965 to 2019
A day with at least 31.1 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 80.9 mm (3.2 in) of rain is expected about once in 100 years.
Rainfall return levels at Judith Gap 13 E: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
31.1 mm (1.2 in)
5 years
43.2 mm (1.7 in)
10 years
51.7 mm (2.0 in)
25 years
63.0 mm (2.5 in)
50 years
71.8 mm (2.8 in)
Longer than the 49 years of record
100 years
80.9 mm (3.2 in)
Longer than the 49 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, 49 years of values from 1965 to 2019.
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: 100.3 mm (3.9 in) in 2010; 72.4 mm (2.9 in) in 1965; 48.3 mm (1.9 in) in 1975.
Station Changes
1 suspected
One change was suspected in the annual mean temperature of Judith Gap 13 E, at 1986. Each is measured against neighbouring stations.
Relative to 5 neighbouring stations, the station's annual mean temperature from 1986 ran 0.4 C (0.8 F) lower than in the years before (likely change).
Suspected changes in the annual mean temperature at Judith Gap 13 E, against neighbouring stations
Year
Shift (C)
Shift (F)
Strength
Neighbours
1986
-0.4
-0.8
likely
5
Possible change at the station (a move, a new instrument or a new site); the record is kept as measured. A "likely" change has a larger test statistic than a "possible" one. Neither says why the station differs from its neighbours. How changes are found, and the largest ones.
Climate Twins
1999 to 2019 against 1961 to 1990
Over 1999 to 2019, Judith Gap 13 E had a mean temperature of 5.9 C (42.5 F) and 358.2 mm (14.1 in) of rain a year. The 3 stations whose 1961 to 1990 climate was closest to that are Glenrock 14 SSE (United States, 525 km away), Laketown (United States, 552 km away) and Double Four Rch (United States, 589 km away).
Climate twins of Judith Gap 13 E: stations whose 1961 to 1990 climate is closest to its 1999 to 2019 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 Judith Gap 13 E standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Judith Gap 13 E 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.