Record envelope, standing records and threshold days for Sunburst 8 E (USC00247996), Montana, United States, with 64 years of record.
Key Facts for Sunburst 8 E
Sunburst 8 E (USC00247996) is a weather station in Montana, United States at 48.89 latitude and -111.73 longitude, 1,128 m (3,700 ft) above sea level.
The station reports from 1951 to 2014, 64 years of record.
1,464 records set at Sunburst 8 E still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Sunburst 8 E set a daily record snowfall of 10.2 cm (4.0 in) on 28 March 2014.
About the Station
Location: Montana, United States, 48.89 latitude, -111.73 longitude.
Elevation: 1,128 m (3,700 ft).
Period of record: 1951 to 2014, 64 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 Sunburst 8 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 Sunburst 8 E, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
15.6 C (60.1 F)
-34.4 C (-29.9 F)
n/a
n/a
Feb
22.8 C (73.0 F)
-36.1 C (-33.0 F)
n/a
n/a
Mar
26.1 C (79.0 F)
-34.4 C (-29.9 F)
n/a
n/a
Apr
31.7 C (89.1 F)
-20.6 C (-5.1 F)
n/a
n/a
May
32.8 C (91.0 F)
-8.3 C (17.1 F)
n/a
n/a
Jun
38.9 C (102.0 F)
-1.1 C (30.0 F)
n/a
n/a
Jul
39.4 C (102.9 F)
1.7 C (35.1 F)
n/a
n/a
Aug
37.2 C (99.0 F)
-1.7 C (28.9 F)
n/a
n/a
Sep
35.6 C (96.1 F)
-6.7 C (19.9 F)
n/a
n/a
Oct
30.6 C (87.1 F)
-22.8 C (-9.0 F)
n/a
n/a
Nov
22.2 C (72.0 F)
-31.7 C (-25.1 F)
n/a
n/a
Dec
17.8 C (64.0 F)
-44.4 C (-47.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Sunburst 8 E still stand. 1987 holds the most, with 75.
Standing records at Sunburst 8 E by the year they were set
Year set
Standing records
1980
50
1981
31
1982
37
1983
40
1984
46
1985
68
1986
54
1987
75
1988
48
1989
37
1990
41
1991
49
1992
68
1993
37
1994
32
1995
29
1996
54
1997
48
1998
29
1999
45
2000
29
2001
38
2002
59
2003
56
2004
39
2005
56
2006
27
2007
28
2008
43
2009
49
2010
29
2011
25
2012
28
2013
26
2014
14
All-Time Record Progression
4 new records
4 all-time records were set at Sunburst 8 E between 6 June 1995 and 7 December 2013. Each dot is a new record.
When Sunburst 8 E set new all-time records
Date
Kind
Detail
1995-06-06
Record daily precipitation
Record daily precipitation 91.9 mm (3.6 in)
2000-03-29
Record daily snowfall
Record daily snowfall 30.5 cm (12.0 in)
2002-05-22
Record daily snowfall
Record daily snowfall 33.0 cm (13.0 in)
2013-12-07
Record low minimum temperature
Record low minimum temperature -44.4 C (-47.9 F)
Wettest Day of Each Month
Jun: 91.9 mm (3.6 in)
The wettest day on record for each calendar month at Sunburst 8 E. The most was 91.9 mm (3.6 in) on 6 June 1995.
Record daily precipitation for each month at Sunburst 8 E
Month
Record daily precipitation (mm)
Date
Jan
21.6 mm (0.9 in)
14 January 2014
Feb
11.9 mm (0.5 in)
20 February 1974
Mar
26.7 mm (1.1 in)
30 March 1981
Apr
30.7 mm (1.2 in)
18 April 1978
May
79.0 mm (3.1 in)
25 May 1953
Jun
91.9 mm (3.6 in)
6 June 1995
Jul
54.6 mm (2.1 in)
21 July 1995
Aug
54.4 mm (2.1 in)
20 August 1959
Sep
43.9 mm (1.7 in)
27 September 1982
Oct
33.0 mm (1.3 in)
6 October 2011
Nov
19.1 mm (0.8 in)
12 November 1989
Dec
24.4 mm (1.0 in)
13 December 2008
Period of Record Coverage
1980 to 2014
Complete yearUnder 90 percent of days
35 years of record at Sunburst 8 E, 1980 to 2014. 8 years have data for under 90 percent of days and are left out of rankings: 1980, 1991, 1992, 1993, 1994, 1995, 1996, 2014.
Cooler than the station meanWarmer than the station mean
One stripe for each of 27 complete years at Sunburst 8 E, 1981 to 2013. Blue stripes are years cooler than the station's own mean of 6.5 C (43.7 F); red stripes are warmer. The coolest year was 1982, at 4.3 C (39.7 F), and the warmest was 1987, at 8.5 C (47.2 F). The strongest colour marks a difference of 2.3 C (4.1 F).
Annual mean temperature at Sunburst 8 E as warming stripes, 1981 to 2013
Year
Annual mean temperature
Difference from the station mean
1981
7.5 C
+1.04 C
1982
4.3 C
-2.21 C
1983
6.3 C
-0.18 C
1984
6.2 C
-0.24 C
1985
5.0 C
-1.46 C
1986
7.0 C
+0.52 C
1987
8.5 C
+1.99 C
1988
7.8 C
+1.35 C
1989
5.6 C
-0.88 C
1990
6.5 C
+0.02 C
1991
7.1 C
+0.63 C
1997
6.6 C
+0.07 C
1998
7.6 C
+1.16 C
1999
7.4 C
+0.91 C
2000
6.1 C
-0.34 C
2001
7.2 C
+0.73 C
2002
5.4 C
-1.11 C
2003
6.6 C
+0.10 C
2004
6.7 C
+0.20 C
2005
6.7 C
+0.24 C
2006
7.6 C
+1.14 C
2007
7.1 C
+0.58 C
2008
5.6 C
-0.84 C
2009
5.5 C
-0.96 C
2010
5.7 C
-0.82 C
2011
5.4 C
-1.10 C
2013
5.9 C
-0.55 C
This station does not have enough complete years (30 are needed) to fit a temperature trend.
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
1951 to 2014
Yearly extremes at Sunburst 8 E: 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)
1985
35.6 C (96.1 F)
35
Coldest night (TNn)
-44.4 C (-47.9 F)
2013
-32.8 C (-27.0 F)
35
Wettest day (Rx1day)
91.9 mm (3.6 in)
1995
32.0 mm (1.3 in)
64
Wettest five days (Rx5day)
149.4 mm (5.9 in)
2013
51.6 mm (2.0 in)
64
Longest dry spell (CDD)
79 days
1963
34 days
64
Hottest day (TXx)
The hottest day of the year at Sunburst 8 E, 1951 to 2014. The record is 39.4 C (102.9 F) in 1985, marked on the chart; the median year is 35.6 C (96.1 F).
Hottest day (TXx) at Sunburst 8 E by year
Year
Hottest day (TXx)
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1965
n/a
1966
n/a
1967
n/a
1968
n/a
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1973
n/a
1974
n/a
1975
n/a
1976
n/a
1977
n/a
1978
n/a
1979
n/a
1980
33.3 C (91.9 F)
1981
35.0 C (95.0 F)
1982
32.2 C (90.0 F)
1983
36.7 C (98.1 F)
1984
37.2 C (99.0 F)
1985
39.4 C (102.9 F)
1986
33.3 C (91.9 F)
1987
35.0 C (95.0 F)
1988
36.7 C (98.1 F)
1989
35.6 C (96.1 F)
1990
38.9 C (102.0 F)
1991
36.7 C (98.1 F)
1992
36.1 C (97.0 F)
1993
31.7 C (89.1 F)
1994
36.1 C (97.0 F)
1995
32.2 C (90.0 F)
1996
36.7 C (98.1 F)
1997
34.4 C (93.9 F)
1998
35.6 C (96.1 F)
1999
36.7 C (98.1 F)
2000
36.7 C (98.1 F)
2001
36.7 C (98.1 F)
2002
35.0 C (95.0 F)
2003
37.8 C (100.0 F)
2004
36.1 C (97.0 F)
2005
35.0 C (95.0 F)
2006
35.6 C (96.1 F)
2007
39.4 C (102.9 F)
2008
34.4 C (93.9 F)
2009
33.9 C (93.0 F)
2010
35.0 C (95.0 F)
2011
33.3 C (91.9 F)
2012
35.0 C (95.0 F)
2013
33.3 C (91.9 F)
2014
13.3 C (55.9 F)
Coldest night (TNn)
The coldest night of the year at Sunburst 8 E, 1951 to 2014. The record is -44.4 C (-47.9 F) in 2013, marked on the chart; the median year is -32.8 C (-27.0 F).
Coldest night (TNn) at Sunburst 8 E by year
Year
Coldest night (TNn)
1951
n/a
1952
n/a
1953
n/a
1954
n/a
1955
n/a
1956
n/a
1957
n/a
1958
n/a
1959
n/a
1960
n/a
1961
n/a
1962
n/a
1963
n/a
1964
n/a
1965
n/a
1966
n/a
1967
n/a
1968
n/a
1969
n/a
1970
n/a
1971
n/a
1972
n/a
1973
n/a
1974
n/a
1975
n/a
1976
n/a
1977
n/a
1978
n/a
1979
n/a
1980
-29.4 C (-20.9 F)
1981
-28.9 C (-20.0 F)
1982
-33.9 C (-29.0 F)
1983
-39.4 C (-38.9 F)
1984
-33.3 C (-27.9 F)
1985
-31.7 C (-25.1 F)
1986
-33.3 C (-27.9 F)
1987
-24.4 C (-11.9 F)
1988
-26.7 C (-16.1 F)
1989
-36.1 C (-33.0 F)
1990
-34.4 C (-29.9 F)
1991
-29.4 C (-20.9 F)
1992
-36.7 C (-34.1 F)
1993
-32.8 C (-27.0 F)
1994
-32.8 C (-27.0 F)
1995
-31.7 C (-25.1 F)
1996
-34.4 C (-29.9 F)
1997
-34.4 C (-29.9 F)
1998
-33.3 C (-27.9 F)
1999
-25.0 C (-13.0 F)
2000
-29.4 C (-20.9 F)
2001
-26.1 C (-15.0 F)
2002
-31.1 C (-24.0 F)
2003
-29.4 C (-20.9 F)
2004
-32.8 C (-27.0 F)
2005
-32.8 C (-27.0 F)
2006
-34.4 C (-29.9 F)
2007
-25.6 C (-14.1 F)
2008
-34.4 C (-29.9 F)
2009
-31.7 C (-25.1 F)
2010
-28.9 C (-20.0 F)
2011
-30.6 C (-23.1 F)
2012
-33.9 C (-29.0 F)
2013
-44.4 C (-47.9 F)
2014
-35.6 C (-32.1 F)
Wettest day (Rx1day)
The wettest day of the year at Sunburst 8 E, 1951 to 2014. The record is 91.9 mm (3.6 in) in 1995, marked on the chart; the median year is 32.0 mm (1.3 in).
Wettest day (Rx1day) at Sunburst 8 E by year
Year
Wettest day (Rx1day)
1951
31.0 mm (1.2 in)
1952
27.7 mm (1.1 in)
1953
79.0 mm (3.1 in)
1954
26.9 mm (1.1 in)
1955
41.1 mm (1.6 in)
1956
34.3 mm (1.4 in)
1957
28.4 mm (1.1 in)
1958
33.3 mm (1.3 in)
1959
81.0 mm (3.2 in)
1960
36.1 mm (1.4 in)
1961
13.5 mm (0.5 in)
1962
17.8 mm (0.7 in)
1963
24.4 mm (1.0 in)
1964
45.2 mm (1.8 in)
1965
46.0 mm (1.8 in)
1966
35.3 mm (1.4 in)
1967
19.1 mm (0.8 in)
1968
30.0 mm (1.2 in)
1969
19.1 mm (0.8 in)
1970
40.4 mm (1.6 in)
1971
23.1 mm (0.9 in)
1972
33.5 mm (1.3 in)
1973
34.3 mm (1.4 in)
1974
23.6 mm (0.9 in)
1975
36.8 mm (1.4 in)
1976
27.9 mm (1.1 in)
1977
25.1 mm (1.0 in)
1978
45.2 mm (1.8 in)
1979
30.5 mm (1.2 in)
1980
40.6 mm (1.6 in)
1981
27.7 mm (1.1 in)
1982
43.9 mm (1.7 in)
1983
24.4 mm (1.0 in)
1984
13.7 mm (0.5 in)
1985
48.3 mm (1.9 in)
1986
26.7 mm (1.1 in)
1987
36.8 mm (1.4 in)
1988
34.3 mm (1.4 in)
1989
37.1 mm (1.5 in)
1990
29.5 mm (1.2 in)
1991
34.8 mm (1.4 in)
1992
21.6 mm (0.9 in)
1993
39.4 mm (1.6 in)
1994
24.4 mm (1.0 in)
1995
91.9 mm (3.6 in)
1996
28.7 mm (1.1 in)
1997
26.7 mm (1.1 in)
1998
33.0 mm (1.3 in)
1999
58.4 mm (2.3 in)
2000
14.5 mm (0.6 in)
2001
33.0 mm (1.3 in)
2002
63.5 mm (2.5 in)
2003
20.6 mm (0.8 in)
2004
23.1 mm (0.9 in)
2005
42.2 mm (1.7 in)
2006
36.8 mm (1.4 in)
2007
25.4 mm (1.0 in)
2008
24.4 mm (1.0 in)
2009
25.7 mm (1.0 in)
2010
33.5 mm (1.3 in)
2011
33.0 mm (1.3 in)
2012
26.2 mm (1.0 in)
2013
57.2 mm (2.3 in)
2014
21.6 mm (0.9 in)
Wettest five days (Rx5day)
The wettest five days of the year at Sunburst 8 E, 1951 to 2014. The record is 149.4 mm (5.9 in) in 2013, marked on the chart; the median year is 51.6 mm (2.0 in).
Wettest five days (Rx5day) at Sunburst 8 E by year
Year
Wettest five days (Rx5day)
1951
61.8 mm (2.4 in)
1952
49.0 mm (1.9 in)
1953
101.6 mm (4.0 in)
1954
39.1 mm (1.5 in)
1955
65.0 mm (2.6 in)
1956
63.1 mm (2.5 in)
1957
35.0 mm (1.4 in)
1958
54.6 mm (2.1 in)
1959
86.3 mm (3.4 in)
1960
43.5 mm (1.7 in)
1961
24.1 mm (0.9 in)
1962
36.9 mm (1.5 in)
1963
27.7 mm (1.1 in)
1964
100.3 mm (3.9 in)
1965
65.8 mm (2.6 in)
1966
52.5 mm (2.1 in)
1967
31.7 mm (1.2 in)
1968
56.4 mm (2.2 in)
1969
52.9 mm (2.1 in)
1970
59.9 mm (2.4 in)
1971
46.8 mm (1.8 in)
1972
38.8 mm (1.5 in)
1973
55.7 mm (2.2 in)
1974
49.1 mm (1.9 in)
1975
85.1 mm (3.4 in)
1976
51.6 mm (2.0 in)
1977
43.9 mm (1.7 in)
1978
76.2 mm (3.0 in)
1979
41.9 mm (1.6 in)
1980
69.5 mm (2.7 in)
1981
68.6 mm (2.7 in)
1982
70.1 mm (2.8 in)
1983
39.6 mm (1.6 in)
1984
18.8 mm (0.7 in)
1985
54.4 mm (2.1 in)
1986
46.0 mm (1.8 in)
1987
47.1 mm (1.9 in)
1988
38.1 mm (1.5 in)
1989
58.2 mm (2.3 in)
1990
63.8 mm (2.5 in)
1991
60.7 mm (2.4 in)
1992
37.2 mm (1.5 in)
1993
67.9 mm (2.7 in)
1994
34.0 mm (1.3 in)
1995
115.5 mm (4.5 in)
1996
50.5 mm (2.0 in)
1997
42.7 mm (1.7 in)
1998
44.3 mm (1.7 in)
1999
72.4 mm (2.9 in)
2000
20.8 mm (0.8 in)
2001
34.5 mm (1.4 in)
2002
132.6 mm (5.2 in)
2003
28.4 mm (1.1 in)
2004
43.1 mm (1.7 in)
2005
114.9 mm (4.5 in)
2006
51.5 mm (2.0 in)
2007
41.5 mm (1.6 in)
2008
59.2 mm (2.3 in)
2009
32.4 mm (1.3 in)
2010
56.4 mm (2.2 in)
2011
92.6 mm (3.6 in)
2012
44.5 mm (1.8 in)
2013
149.4 mm (5.9 in)
2014
21.6 mm (0.9 in)
Longest dry spell (CDD)
The longest dry spell of the year at Sunburst 8 E, 1951 to 2014. The record is 79 days in 1963, marked on the chart; the median year is 34 days.
Longest dry spell (CDD) at Sunburst 8 E by year
Year
Longest dry spell (CDD)
1951
42 days
1952
34 days
1953
40 days
1954
60 days
1955
56 days
1956
43 days
1957
47 days
1958
23 days
1959
48 days
1960
45 days
1961
37 days
1962
42 days
1963
79 days
1964
27 days
1965
46 days
1966
34 days
1967
36 days
1968
51 days
1969
47 days
1970
31 days
1971
50 days
1972
29 days
1973
53 days
1974
28 days
1975
20 days
1976
51 days
1977
35 days
1978
34 days
1979
30 days
1980
25 days
1981
29 days
1982
30 days
1983
32 days
1984
38 days
1985
27 days
1986
32 days
1987
56 days
1988
33 days
1989
25 days
1990
44 days
1991
31 days
1992
29 days
1993
44 days
1994
30 days
1995
27 days
1996
30 days
1997
40 days
1998
34 days
1999
24 days
2000
27 days
2001
43 days
2002
29 days
2003
61 days
2004
38 days
2005
31 days
2006
24 days
2007
27 days
2008
26 days
2009
34 days
2010
32 days
2011
22 days
2012
27 days
2013
17 days
2014
14 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
27 years with a frost
Across 27 years with a frost, the median last spring frost at Sunburst 8 E falls on 19 May and the median first autumn frost on 19 September, which leaves a median of 123 days between them.
Fitted over all years, the growing season changes by +1.4 days per decade at this station.
Frost dates and growing season at Sunburst 8 E
Measure
Median, all years
Earliest period
Recent period (1981 to 2013)
Recent against earliest
Fitted trend
Last spring frost
19 May
n/a
19 May
n/a
0.0 days per decade
First autumn frost
19 September
n/a
19 September
n/a
+1.4 days per decade
Growing days
123 days
n/a
123 days
n/a
+1.4 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
59 years, 1952 to 2011
A day with at least 30.6 mm (1.2 in) of rain is expected about once in 2 years. A day with at least 90.8 mm (3.6 in) of rain is expected about once in 100 years.
Rainfall return levels at Sunburst 8 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
30.6 mm (1.2 in)
5 years
42.9 mm (1.7 in)
10 years
52.4 mm (2.1 in)
25 years
66.1 mm (2.6 in)
50 years
77.8 mm (3.1 in)
100 years
90.8 mm (3.6 in)
Longer than the 59 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, 59 years of values from 1952 to 2011.
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: 91.9 mm (3.6 in) in 1995; 81.0 mm (3.2 in) in 1959; 79.0 mm (3.1 in) in 1953.
Download the Data
Data for Sunburst 8 E standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Sunburst 8 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.