Record envelope, standing records and threshold days for Billy Creek (USC00480740), Wyoming, United States, with 52 years of record.
Key Facts for Billy Creek
Billy Creek (USC00480740) is a weather station in Wyoming, United States at 44.12 latitude and -106.73 longitude, 1,516 m (4,975 ft) above sea level.
The station reports from 1962 to 2013, 52 years of record.
1,464 records set at Billy Creek still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Billy Creek set a daily record low minimum temperature of -7.2 C (19.0 F) on 24 April 2013.
About the Station
Location: Wyoming, United States, 44.12 latitude, -106.73 longitude.
Elevation: 1,516 m (4,975 ft).
Period of record: 1962 to 2013, 52 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 Billy Creek. 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 Billy Creek, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
21.1 C (70.0 F)
-37.8 C (-36.0 F)
n/a
n/a
Feb
21.7 C (71.1 F)
-40.6 C (-41.1 F)
n/a
n/a
Mar
25.6 C (78.1 F)
-29.4 C (-20.9 F)
n/a
n/a
Apr
29.4 C (84.9 F)
-18.3 C (-0.9 F)
n/a
n/a
May
32.8 C (91.0 F)
-12.2 C (10.0 F)
n/a
n/a
Jun
38.9 C (102.0 F)
-3.9 C (25.0 F)
n/a
n/a
Jul
41.7 C (107.1 F)
1.7 C (35.1 F)
n/a
n/a
Aug
40.6 C (105.1 F)
-0.6 C (30.9 F)
n/a
n/a
Sep
36.7 C (98.1 F)
-11.7 C (10.9 F)
n/a
n/a
Oct
32.2 C (90.0 F)
-24.4 C (-11.9 F)
n/a
n/a
Nov
27.2 C (81.0 F)
-32.2 C (-26.0 F)
n/a
n/a
Dec
22.2 C (72.0 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 Billy Creek still stand. 1985 holds the most, with 50.
Standing records at Billy Creek by the year they were set
Year set
Standing records
1962
23
1963
38
1964
18
1965
39
1966
34
1967
19
1968
27
1969
24
1970
26
1971
22
1972
37
1973
29
1974
17
1975
24
1976
13
1977
13
1978
26
1979
22
1980
26
1981
26
1982
27
1983
32
1984
32
1985
50
1986
27
1987
35
1988
42
1989
49
1990
35
1991
28
1992
32
1993
32
1994
23
1995
38
1996
41
1997
37
1998
22
1999
27
2000
38
2001
10
2002
39
2003
36
2004
15
2005
27
2006
26
2007
18
2008
18
2009
35
2010
22
2011
26
2012
30
2013
12
All-Time Record Progression
4 new records
4 all-time records were set at Billy Creek between 15 June 1992 and 26 July 2000. Each dot is a new record.
When Billy Creek set new all-time records
Date
Kind
Detail
1992-06-15
Record daily precipitation
Record daily precipitation 88.9 mm (3.5 in)
1998-04-15
Record daily snowfall
Record daily snowfall 55.9 cm (22.0 in)
1998-04-15
Record snow depth
Record snow depth 55.9 cm (22.0 in)
2000-07-26
Record high maximum temperature
Record high maximum temperature 41.7 C (107.1 F)
Wettest Day of Each Month
Jun: 88.9 mm (3.5 in)
The wettest day on record for each calendar month at Billy Creek. The most was 88.9 mm (3.5 in) on 15 June 1992.
Record daily precipitation for each month at Billy Creek
Month
Record daily precipitation (mm)
Date
Jan
15.7 mm (0.6 in)
27 January 2000
Feb
19.8 mm (0.8 in)
29 February 2004
Mar
30.2 mm (1.2 in)
25 March 1977
Apr
47.5 mm (1.9 in)
27 April 1976
May
70.4 mm (2.8 in)
23 May 2008
Jun
88.9 mm (3.5 in)
15 June 1992
Jul
42.7 mm (1.7 in)
26 July 2007
Aug
45.0 mm (1.8 in)
23 August 1968
Sep
34.8 mm (1.4 in)
21 September 1963
Oct
38.9 mm (1.5 in)
3 October 1976
Nov
17.3 mm (0.7 in)
24 November 2002
Dec
8.9 mm (0.35 in)
8 December 1977
Period of Record Coverage
1962 to 2013
Complete yearUnder 90 percent of days
52 years of record at Billy Creek, 1962 to 2013. 2 years have data for under 90 percent of days and are left out of rankings: 1962, 2013.
Cooler than the station meanWarmer than the station mean
One stripe for each of 49 complete years at Billy Creek, 1963 to 2011. Blue stripes are years cooler than the station's own mean of 7.0 C (44.7 F); red stripes are warmer. The coolest year was 1985, at 5.4 C (41.7 F), and the warmest was 1981, at 8.5 C (47.2 F). The strongest colour marks a difference of 1.7 C (3.1 F).
Annual mean temperature at Billy Creek as warming stripes, 1963 to 2011
Year
Annual mean temperature
Difference from the station mean
1963
7.9 C
+0.82 C
1964
6.8 C
-0.23 C
1965
6.8 C
-0.25 C
1966
7.7 C
+0.64 C
1967
6.8 C
-0.25 C
1968
6.5 C
-0.57 C
1969
7.2 C
+0.15 C
1970
6.5 C
-0.50 C
1971
6.4 C
-0.68 C
1972
6.4 C
-0.68 C
1973
7.1 C
+0.03 C
1974
7.4 C
+0.32 C
1975
6.1 C
-0.97 C
1976
7.5 C
+0.43 C
1977
7.2 C
+0.15 C
1978
5.5 C
-1.50 C
1979
6.5 C
-0.57 C
1980
7.6 C
+0.60 C
1981
8.5 C
+1.44 C
1982
6.9 C
-0.17 C
1983
7.0 C
-0.04 C
1984
6.3 C
-0.76 C
1985
5.4 C
-1.65 C
1986
7.8 C
+0.80 C
1987
8.0 C
+0.93 C
1988
8.0 C
+0.97 C
1989
6.3 C
-0.70 C
1990
7.2 C
+0.16 C
1991
7.1 C
+0.10 C
1992
7.5 C
+0.51 C
1993
5.5 C
-1.57 C
1994
7.9 C
+0.85 C
1995
6.8 C
-0.28 C
1996
5.9 C
-1.15 C
1997
6.7 C
-0.36 C
1998
7.4 C
+0.34 C
1999
8.3 C
+1.23 C
2000
7.0 C
0.00 C
2001
7.2 C
+0.20 C
2002
5.6 C
-1.44 C
2003
7.7 C
+0.66 C
2004
7.8 C
+0.79 C
2005
7.5 C
+0.50 C
2006
8.1 C
+1.09 C
2007
7.7 C
+0.69 C
2008
6.6 C
-0.39 C
2009
6.7 C
-0.30 C
2010
7.5 C
+0.47 C
2011
7.3 C
+0.25 C
The fitted trend in annual mean temperature here over 1963 to 2011 is 0.1 C (-0.1 to 0.2) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.2 F (-0.1 to 0.4) per decade. The slope is a straight line fitted to 49 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Billy Creek
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.1 C (-0.1 to 0.2) per decade
0.2 F (-0.1 to 0.4) per decade
1963 to 2011
49
Not clearly different from zero
Mean daily maximum
0.1 C (-0.1 to 0.3) per decade
0.1 F (-0.2 to 0.5) per decade
1963 to 2011
49
Not clearly different from zero
Mean daily minimum
0.10 C (-0.05 to 0.24) per decade
0.2 F (-0.1 to 0.4) per decade
1963 to 2011
49
Not clearly different from zero
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
1962 to 2013
Yearly extremes at Billy Creek: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.7 C (107.1 F)
2000
37.2 C (99.0 F)
52
Coldest night (TNn)
-40.6 C (-41.1 F)
1989
-29.7 C (-21.5 F)
52
Wettest day (Rx1day)
88.9 mm (3.5 in)
1992
29.9 mm (1.2 in)
52
Wettest five days (Rx5day)
125.6 mm (4.9 in)
2008
48.3 mm (1.9 in)
52
Longest dry spell (CDD)
83 days
2005
33 days
52
Hottest day (TXx)
The hottest day of the year at Billy Creek, 1962 to 2013. The record is 41.7 C (107.1 F) in 2000, marked on the chart; the median year is 37.2 C (99.0 F).
Hottest day (TXx) at Billy Creek by year
Year
Hottest day (TXx)
1962
33.3 C (91.9 F)
1963
35.0 C (95.0 F)
1964
36.7 C (98.1 F)
1965
37.2 C (99.0 F)
1966
38.3 C (100.9 F)
1967
34.4 C (93.9 F)
1968
33.9 C (93.0 F)
1969
37.8 C (100.0 F)
1970
37.2 C (99.0 F)
1971
36.7 C (98.1 F)
1972
37.2 C (99.0 F)
1973
37.2 C (99.0 F)
1974
35.0 C (95.0 F)
1975
36.1 C (97.0 F)
1976
36.7 C (98.1 F)
1977
37.8 C (100.0 F)
1978
36.7 C (98.1 F)
1979
40.6 C (105.1 F)
1980
37.2 C (99.0 F)
1981
38.3 C (100.9 F)
1982
38.3 C (100.9 F)
1983
37.2 C (99.0 F)
1984
35.0 C (95.0 F)
1985
36.1 C (97.0 F)
1986
35.6 C (96.1 F)
1987
33.9 C (93.0 F)
1988
38.3 C (100.9 F)
1989
40.0 C (104.0 F)
1990
38.3 C (100.9 F)
1991
36.7 C (98.1 F)
1992
33.9 C (93.0 F)
1993
36.1 C (97.0 F)
1994
36.7 C (98.1 F)
1995
38.3 C (100.9 F)
1996
37.8 C (100.0 F)
1997
37.8 C (100.0 F)
1998
39.4 C (102.9 F)
1999
37.8 C (100.0 F)
2000
41.7 C (107.1 F)
2001
37.8 C (100.0 F)
2002
38.3 C (100.9 F)
2003
40.0 C (104.0 F)
2004
35.6 C (96.1 F)
2005
40.0 C (104.0 F)
2006
39.4 C (102.9 F)
2007
39.4 C (102.9 F)
2008
38.9 C (102.0 F)
2009
35.0 C (95.0 F)
2010
37.8 C (100.0 F)
2011
37.8 C (100.0 F)
2012
38.9 C (102.0 F)
2013
23.9 C (75.0 F)
Coldest night (TNn)
The coldest night of the year at Billy Creek, 1962 to 2013. The record is -40.6 C (-41.1 F) in 1989, marked on the chart; the median year is -29.7 C (-21.5 F).
Coldest night (TNn) at Billy Creek by year
Year
Coldest night (TNn)
1962
-25.0 C (-13.0 F)
1963
-37.8 C (-36.0 F)
1964
-38.9 C (-38.0 F)
1965
-29.4 C (-20.9 F)
1966
-28.3 C (-18.9 F)
1967
-29.4 C (-20.9 F)
1968
-32.8 C (-27.0 F)
1969
-25.6 C (-14.1 F)
1970
-27.8 C (-18.0 F)
1971
-27.8 C (-18.0 F)
1972
-34.4 C (-29.9 F)
1973
-32.8 C (-27.0 F)
1974
-30.6 C (-23.1 F)
1975
-30.6 C (-23.1 F)
1976
-27.2 C (-17.0 F)
1977
-31.7 C (-25.1 F)
1978
-33.9 C (-29.0 F)
1979
-32.2 C (-26.0 F)
1980
-31.7 C (-25.1 F)
1981
-32.2 C (-26.0 F)
1982
-31.1 C (-24.0 F)
1983
-36.7 C (-34.1 F)
1984
-32.2 C (-26.0 F)
1985
-32.2 C (-26.0 F)
1986
-27.8 C (-18.0 F)
1987
-21.7 C (-7.1 F)
1988
-27.2 C (-17.0 F)
1989
-40.6 C (-41.1 F)
1990
-39.4 C (-38.9 F)
1991
-29.4 C (-20.9 F)
1992
-27.8 C (-18.0 F)
1993
-29.4 C (-20.9 F)
1994
-28.3 C (-18.9 F)
1995
-26.1 C (-15.0 F)
1996
-35.6 C (-32.1 F)
1997
-35.6 C (-32.1 F)
1998
-33.3 C (-27.9 F)
1999
-21.7 C (-7.1 F)
2000
-28.3 C (-18.9 F)
2001
-24.4 C (-11.9 F)
2002
-27.2 C (-17.0 F)
2003
-27.2 C (-17.0 F)
2004
-29.4 C (-20.9 F)
2005
-30.0 C (-22.0 F)
2006
-32.8 C (-27.0 F)
2007
-31.7 C (-25.1 F)
2008
-31.1 C (-24.0 F)
2009
-30.6 C (-23.1 F)
2010
-29.4 C (-20.9 F)
2011
-27.8 C (-18.0 F)
2012
-23.3 C (-9.9 F)
2013
-20.6 C (-5.1 F)
Wettest day (Rx1day)
The wettest day of the year at Billy Creek, 1962 to 2013. The record is 88.9 mm (3.5 in) in 1992, marked on the chart; the median year is 29.9 mm (1.2 in).
Wettest day (Rx1day) at Billy Creek by year
Year
Wettest day (Rx1day)
1962
31.5 mm (1.2 in)
1963
46.2 mm (1.8 in)
1964
26.9 mm (1.1 in)
1965
16.5 mm (0.6 in)
1966
30.7 mm (1.2 in)
1967
34.3 mm (1.4 in)
1968
45.0 mm (1.8 in)
1969
22.1 mm (0.9 in)
1970
49.3 mm (1.9 in)
1971
24.4 mm (1.0 in)
1972
17.8 mm (0.7 in)
1973
31.5 mm (1.2 in)
1974
21.1 mm (0.8 in)
1975
49.3 mm (1.9 in)
1976
47.5 mm (1.9 in)
1977
30.5 mm (1.2 in)
1978
32.8 mm (1.3 in)
1979
31.2 mm (1.2 in)
1980
31.5 mm (1.2 in)
1981
27.9 mm (1.1 in)
1982
33.3 mm (1.3 in)
1983
17.8 mm (0.7 in)
1984
41.7 mm (1.6 in)
1985
15.5 mm (0.6 in)
1986
22.1 mm (0.9 in)
1987
22.4 mm (0.9 in)
1988
25.4 mm (1.0 in)
1989
16.5 mm (0.6 in)
1990
21.6 mm (0.9 in)
1991
23.9 mm (0.9 in)
1992
88.9 mm (3.5 in)
1993
24.1 mm (0.9 in)
1994
22.9 mm (0.9 in)
1995
24.9 mm (1.0 in)
1996
30.0 mm (1.2 in)
1997
41.9 mm (1.6 in)
1998
34.5 mm (1.4 in)
1999
23.4 mm (0.9 in)
2000
21.3 mm (0.8 in)
2001
36.6 mm (1.4 in)
2002
25.4 mm (1.0 in)
2003
29.7 mm (1.2 in)
2004
38.1 mm (1.5 in)
2005
60.7 mm (2.4 in)
2006
20.3 mm (0.8 in)
2007
42.7 mm (1.7 in)
2008
70.4 mm (2.8 in)
2009
49.5 mm (1.9 in)
2010
27.2 mm (1.1 in)
2011
44.2 mm (1.7 in)
2012
17.3 mm (0.7 in)
2013
16.8 mm (0.7 in)
Wettest five days (Rx5day)
The wettest five days of the year at Billy Creek, 1962 to 2013. The record is 125.6 mm (4.9 in) in 2008, marked on the chart; the median year is 48.3 mm (1.9 in).
Wettest five days (Rx5day) at Billy Creek by year
Year
Wettest five days (Rx5day)
1962
72.1 mm (2.8 in)
1963
91.9 mm (3.6 in)
1964
34.3 mm (1.4 in)
1965
24.3 mm (1.0 in)
1966
32.2 mm (1.3 in)
1967
69.1 mm (2.7 in)
1968
101.6 mm (4.0 in)
1969
29.5 mm (1.2 in)
1970
55.9 mm (2.2 in)
1971
48.1 mm (1.9 in)
1972
27.0 mm (1.1 in)
1973
72.9 mm (2.9 in)
1974
42.2 mm (1.7 in)
1975
83.1 mm (3.3 in)
1976
79.3 mm (3.1 in)
1977
67.9 mm (2.7 in)
1978
60.5 mm (2.4 in)
1979
45.2 mm (1.8 in)
1980
55.9 mm (2.2 in)
1981
65.4 mm (2.6 in)
1982
52.8 mm (2.1 in)
1983
33.4 mm (1.3 in)
1984
87.6 mm (3.4 in)
1985
25.9 mm (1.0 in)
1986
37.3 mm (1.5 in)
1987
29.4 mm (1.2 in)
1988
25.4 mm (1.0 in)
1989
36.1 mm (1.4 in)
1990
27.7 mm (1.1 in)
1991
57.6 mm (2.3 in)
1992
112.8 mm (4.4 in)
1993
48.5 mm (1.9 in)
1994
38.9 mm (1.5 in)
1995
37.3 mm (1.5 in)
1996
79.3 mm (3.1 in)
1997
48.7 mm (1.9 in)
1998
75.0 mm (3.0 in)
1999
45.8 mm (1.8 in)
2000
39.9 mm (1.6 in)
2001
38.4 mm (1.5 in)
2002
41.6 mm (1.6 in)
2003
34.4 mm (1.4 in)
2004
50.3 mm (2.0 in)
2005
125.2 mm (4.9 in)
2006
34.3 mm (1.4 in)
2007
91.4 mm (3.6 in)
2008
125.6 mm (4.9 in)
2009
76.5 mm (3.0 in)
2010
46.8 mm (1.8 in)
2011
65.6 mm (2.6 in)
2012
33.8 mm (1.3 in)
2013
7.7 mm (0.30 in)
Longest dry spell (CDD)
The longest dry spell of the year at Billy Creek, 1962 to 2013. The record is 83 days in 2005, marked on the chart; the median year is 33 days.
Longest dry spell (CDD) at Billy Creek by year
Year
Longest dry spell (CDD)
1962
39 days
1963
36 days
1964
31 days
1965
75 days
1966
30 days
1967
53 days
1968
27 days
1969
44 days
1970
67 days
1971
30 days
1972
24 days
1973
69 days
1974
32 days
1975
31 days
1976
38 days
1977
59 days
1978
23 days
1979
41 days
1980
27 days
1981
30 days
1982
24 days
1983
64 days
1984
44 days
1985
45 days
1986
24 days
1987
46 days
1988
35 days
1989
24 days
1990
25 days
1991
31 days
1992
64 days
1993
28 days
1994
42 days
1995
34 days
1996
33 days
1997
38 days
1998
27 days
1999
43 days
2000
44 days
2001
30 days
2002
27 days
2003
25 days
2004
58 days
2005
83 days
2006
39 days
2007
38 days
2008
25 days
2009
33 days
2010
25 days
2011
31 days
2012
33 days
2013
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
49 years with a frost
Across 49 years with a frost, the median last spring frost at Billy Creek falls on 26 May and the median first autumn frost on 17 September, which leaves a median of 111 days between them.
Fitted over all years, the growing season changes by -1.1 days per decade at this station.
Frost dates and growing season at Billy Creek
Measure
Median, all years
Earliest period
Recent period (1982 to 2011)
Recent against earliest
Fitted trend
Last spring frost
26 May
n/a
28 May
n/a
+0.2 days per decade
First autumn frost
17 September
n/a
18 September
n/a
-1.0 days per decade
Growing days
111 days
n/a
112 days
n/a
-1.1 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
50 years, 1963 to 2012
A day with at least 29.0 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 88.5 mm (3.5 in) of rain is expected about once in 100 years.
Rainfall return levels at Billy Creek: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
29.0 mm (1.1 in)
5 years
41.0 mm (1.6 in)
10 years
50.3 mm (2.0 in)
25 years
63.9 mm (2.5 in)
50 years
75.5 mm (3.0 in)
100 years
88.5 mm (3.5 in)
Longer than the 50 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, 50 years of values from 1963 to 2012.
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: 88.9 mm (3.5 in) in 1992; 70.4 mm (2.8 in) in 2008; 60.7 mm (2.4 in) in 2005.
Station Changes
No change in the annual mean temperature of this station was found against its neighbours.
Download the Data
Data for Billy Creek standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Billy Creek 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.