Record envelope, standing records and threshold days for Shell (USC00488124), Wyoming, United States, with 69 years of record.
Key Facts for Shell
Shell (USC00488124) is a weather station in Wyoming, United States at 44.54 latitude and -107.78 longitude, 1,293 m (4,242 ft) above sea level.
The station reports from 1958 to 2026, 69 years of record.
1,464 records set at Shell still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Shell set a daily record low maximum temperature of 22.8 C (73.0 F) on 4 August 2026.
About the Station
Location: Wyoming, United States, 44.54 latitude, -107.78 longitude.
Elevation: 1,293 m (4,242 ft).
Period of record: 1958 to 2026, 69 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
24 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 Shell. The lines show the 2026 daily maximum and minimum. 24 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Shell, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
16.1 C (61.0 F)
-37.8 C (-36.0 F)
15.0 C (59.0 F)
-24.4 C (-11.9 F)
Feb
20.0 C (68.0 F)
-37.8 C (-36.0 F)
20.0 C (68.0 F)
-21.7 C (-7.1 F)
Mar
27.8 C (82.0 F)
-30.6 C (-23.1 F)
27.8 C (82.0 F)
-12.2 C (10.0 F)
Apr
31.1 C (88.0 F)
-18.3 C (-0.9 F)
29.4 C (84.9 F)
-6.1 C (21.0 F)
May
33.9 C (93.0 F)
-11.1 C (12.0 F)
33.9 C (93.0 F)
-6.7 C (19.9 F)
Jun
41.1 C (106.0 F)
-2.2 C (28.0 F)
34.4 C (93.9 F)
2.8 C (37.0 F)
Jul
41.1 C (106.0 F)
-2.8 C (27.0 F)
40.6 C (105.1 F)
9.4 C (48.9 F)
Aug
40.0 C (104.0 F)
-0.6 C (30.9 F)
38.3 C (100.9 F)
4.4 C (39.9 F)
Sep
38.9 C (102.0 F)
-11.1 C (12.0 F)
30.6 C (87.1 F)
1.7 C (35.1 F)
Oct
32.2 C (90.0 F)
-21.7 C (-7.1 F)
27.2 C (81.0 F)
3.9 C (39.0 F)
Nov
25.6 C (78.1 F)
-30.0 C (-22.0 F)
n/a
n/a
Dec
23.9 C (75.0 F)
-41.7 C (-43.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Shell still stand. 1974 holds the most, with 67.
Standing records at Shell by the year they were set
Year set
Standing records
1972
24
1973
51
1974
67
1975
24
1977
1
1978
4
1980
10
1981
30
1982
56
1983
52
1984
37
1985
46
1986
46
1987
31
1988
30
1989
35
1990
31
1991
20
1992
26
1993
43
1994
10
1995
37
1996
35
1997
31
1998
22
1999
23
2000
23
2001
25
2002
25
2003
53
2005
8
2006
22
2007
23
2008
31
2009
29
2010
23
2011
22
2012
25
2013
27
2014
43
2015
27
2016
6
2017
8
2018
16
2019
17
2020
30
2021
31
2022
25
2023
24
2024
24
2025
27
2026
28
Wettest Day of Each Month
May: 48.3 mm (1.9 in)
The wettest day on record for each calendar month at Shell. The most was 48.3 mm (1.9 in) on 7 May 1988.
Record daily precipitation for each month at Shell
Month
Record daily precipitation (mm)
Date
Jan
33.0 mm (1.3 in)
26 January 1975
Feb
17.5 mm (0.7 in)
18 February 2000
Mar
20.6 mm (0.8 in)
9 March 1970
Apr
27.2 mm (1.1 in)
29 April 1978
May
48.3 mm (1.9 in)
7 May 1988
Jun
42.9 mm (1.7 in)
25 June 1969
Jul
32.0 mm (1.3 in)
3 July 1993
Aug
43.2 mm (1.7 in)
29 August 1964
Sep
36.3 mm (1.4 in)
26 September 1982
Oct
44.2 mm (1.7 in)
7 October 2011
Nov
25.4 mm (1.0 in)
23 November 2002
Dec
20.3 mm (0.8 in)
8 December 1972
Period of Record Coverage
1972 to 2026
Complete yearUnder 90 percent of days
52 years of record at Shell, 1972 to 2026. 13 years have data for under 90 percent of days and are left out of rankings: 1972, 1975, 1977, 1978, 1980, 1985, 2003, 2005 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 34 complete years at Shell, 1973 to 2025. Blue stripes are years cooler than the station's own mean of 7.2 C (45.0 F); red stripes are warmer. The coolest year was 1993, at 4.9 C (40.8 F), and the warmest was 1974, at 9.9 C (49.7 F). The strongest colour marks a difference of 2.7 C (4.9 F).
Annual mean temperature at Shell as warming stripes, 1973 to 2025
Year
Annual mean temperature
Difference from the station mean
1973
9.6 C
+2.39 C
1974
9.9 C
+2.66 C
1982
6.0 C
-1.16 C
1983
7.0 C
-0.22 C
1984
6.9 C
-0.28 C
1986
7.9 C
+0.68 C
1987
7.3 C
+0.09 C
1988
7.5 C
+0.30 C
1989
5.7 C
-1.52 C
1990
6.7 C
-0.52 C
1991
6.7 C
-0.50 C
1992
7.2 C
-0.02 C
1993
4.9 C
-2.31 C
1994
7.3 C
+0.13 C
1995
6.9 C
-0.31 C
1996
5.7 C
-1.52 C
1997
6.9 C
-0.32 C
1999
8.1 C
+0.85 C
2001
7.9 C
+0.68 C
2007
8.2 C
+1.01 C
2008
6.6 C
-0.63 C
2009
6.3 C
-0.94 C
2010
7.0 C
-0.17 C
2011
6.5 C
-0.69 C
2012
8.7 C
+1.51 C
2013
6.7 C
-0.47 C
2014
6.4 C
-0.79 C
2015
8.2 C
+0.95 C
2019
6.1 C
-1.15 C
2020
7.5 C
+0.26 C
2021
7.8 C
+0.56 C
2022
6.5 C
-0.74 C
2024
8.5 C
+1.30 C
2025
8.2 C
+0.97 C
The fitted trend in annual mean temperature here over 1973 to 2025 is -0.05 C (-0.31 to 0.21) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: -0.1 F (-0.6 to 0.4) per decade. The slope is a straight line fitted to 34 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Shell
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
-0.05 C (-0.31 to 0.21) per decade
-0.1 F (-0.6 to 0.4) per decade
1973 to 2025
34
Not clearly different from zero
Mean daily maximum
-0.1 C (-0.4 to 0.2) per decade
-0.2 F (-0.7 to 0.4) per decade
1973 to 2025
34
Not clearly different from zero
Mean daily minimum
-0.01 C (-0.29 to 0.27) per decade
-0.02 F (-0.53 to 0.48) per decade
1973 to 2025
34
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
1958 to 2026
Yearly extremes at Shell: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
41.1 C (106.0 F)
2002
37.8 C (100.0 F)
52
Coldest night (TNn)
-41.7 C (-43.1 F)
1983
-30.6 C (-23.1 F)
52
Wettest day (Rx1day)
48.3 mm (1.9 in)
1988
24.0 mm (0.9 in)
66
Wettest five days (Rx5day)
88.9 mm (3.5 in)
1988
34.9 mm (1.4 in)
66
Longest dry spell (CDD)
82 days
1975
37 days
66
Hottest day (TXx)
The hottest day of the year at Shell, 1958 to 2026. The record is 41.1 C (106.0 F) in 2002, marked on the chart; the median year is 37.8 C (100.0 F).
Hottest day (TXx) at Shell by year
Year
Hottest day (TXx)
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
26.1 C (79.0 F)
1973
37.2 C (99.0 F)
1974
39.4 C (102.9 F)
1975
36.1 C (97.0 F)
1977
20.0 C (68.0 F)
1978
30.0 C (86.0 F)
1980
25.6 C (78.1 F)
1981
38.3 C (100.9 F)
1982
37.2 C (99.0 F)
1983
39.4 C (102.9 F)
1984
39.4 C (102.9 F)
1985
39.4 C (102.9 F)
1986
38.3 C (100.9 F)
1987
35.0 C (95.0 F)
1988
38.3 C (100.9 F)
1989
38.3 C (100.9 F)
1990
37.8 C (100.0 F)
1991
37.2 C (99.0 F)
1992
35.0 C (95.0 F)
1993
36.7 C (98.1 F)
1994
35.6 C (96.1 F)
1995
38.3 C (100.9 F)
1996
36.1 C (97.0 F)
1997
35.6 C (96.1 F)
1998
38.3 C (100.9 F)
1999
36.7 C (98.1 F)
2000
37.8 C (100.0 F)
2001
40.6 C (105.1 F)
2002
41.1 C (106.0 F)
2003
39.4 C (102.9 F)
2005
36.7 C (98.1 F)
2006
39.4 C (102.9 F)
2007
39.4 C (102.9 F)
2008
37.8 C (100.0 F)
2009
35.6 C (96.1 F)
2010
37.2 C (99.0 F)
2011
37.8 C (100.0 F)
2012
38.9 C (102.0 F)
2013
36.7 C (98.1 F)
2014
37.2 C (99.0 F)
2015
36.7 C (98.1 F)
2016
36.7 C (98.1 F)
2017
36.7 C (98.1 F)
2018
38.9 C (102.0 F)
2019
37.8 C (100.0 F)
2020
37.2 C (99.0 F)
2021
41.1 C (106.0 F)
2022
39.4 C (102.9 F)
2023
37.8 C (100.0 F)
2024
38.3 C (100.9 F)
2025
37.8 C (100.0 F)
2026
40.6 C (105.1 F)
Coldest night (TNn)
The coldest night of the year at Shell, 1958 to 2026. The record is -41.7 C (-43.1 F) in 1983, marked on the chart; the median year is -30.6 C (-23.1 F).
Coldest night (TNn) at Shell by year
Year
Coldest night (TNn)
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
-38.3 C (-36.9 F)
1973
-30.6 C (-23.1 F)
1974
-28.9 C (-20.0 F)
1975
-28.9 C (-20.0 F)
1977
-28.9 C (-20.0 F)
1978
-7.8 C (18.0 F)
1980
-17.2 C (1.0 F)
1981
-29.4 C (-20.9 F)
1982
-34.4 C (-29.9 F)
1983
-41.7 C (-43.1 F)
1984
-35.6 C (-32.1 F)
1985
-35.6 C (-32.1 F)
1986
-30.0 C (-22.0 F)
1987
-30.6 C (-23.1 F)
1988
-27.2 C (-17.0 F)
1989
-37.8 C (-36.0 F)
1990
-41.1 C (-42.0 F)
1991
-30.6 C (-23.1 F)
1992
-27.8 C (-18.0 F)
1993
-32.2 C (-26.0 F)
1994
-27.8 C (-18.0 F)
1995
-24.4 C (-11.9 F)
1996
-37.8 C (-36.0 F)
1997
-37.8 C (-36.0 F)
1998
-28.9 C (-20.0 F)
1999
-22.2 C (-8.0 F)
2000
-26.7 C (-16.1 F)
2001
-28.3 C (-18.9 F)
2002
-28.3 C (-18.9 F)
2003
-30.6 C (-23.1 F)
2005
-7.2 C (19.0 F)
2006
-26.1 C (-15.0 F)
2007
-31.7 C (-25.1 F)
2008
-32.8 C (-27.0 F)
2009
-32.2 C (-26.0 F)
2010
-32.2 C (-26.0 F)
2011
-33.3 C (-27.9 F)
2012
-25.6 C (-14.1 F)
2013
-31.7 C (-25.1 F)
2014
-36.1 C (-33.0 F)
2015
-29.4 C (-20.9 F)
2016
-21.1 C (-6.0 F)
2017
-35.0 C (-31.0 F)
2018
-20.0 C (-4.0 F)
2019
-30.6 C (-23.1 F)
2020
-21.7 C (-7.1 F)
2021
-30.6 C (-23.1 F)
2022
-38.3 C (-36.9 F)
2023
-33.3 C (-27.9 F)
2024
-33.9 C (-29.0 F)
2025
-30.6 C (-23.1 F)
2026
-24.4 C (-11.9 F)
Wettest day (Rx1day)
The wettest day of the year at Shell, 1958 to 2026. The record is 48.3 mm (1.9 in) in 1988, marked on the chart; the median year is 24.0 mm (0.9 in).
Wettest day (Rx1day) at Shell by year
Year
Wettest day (Rx1day)
1958
7.4 mm (0.29 in)
1959
20.6 mm (0.8 in)
1960
24.6 mm (1.0 in)
1961
26.4 mm (1.0 in)
1962
21.8 mm (0.9 in)
1963
28.2 mm (1.1 in)
1964
43.2 mm (1.7 in)
1965
22.9 mm (0.9 in)
1966
22.9 mm (0.9 in)
1967
25.7 mm (1.0 in)
1968
25.4 mm (1.0 in)
1969
42.9 mm (1.7 in)
1970
20.6 mm (0.8 in)
1971
25.4 mm (1.0 in)
1972
20.3 mm (0.8 in)
1973
28.4 mm (1.1 in)
1974
22.9 mm (0.9 in)
1975
33.0 mm (1.3 in)
1977
3.0 mm (0.12 in)
1978
27.2 mm (1.1 in)
1980
3.8 mm (0.15 in)
1981
18.0 mm (0.7 in)
1982
38.4 mm (1.5 in)
1983
21.8 mm (0.9 in)
1984
30.7 mm (1.2 in)
1985
19.1 mm (0.8 in)
1986
22.9 mm (0.9 in)
1987
32.8 mm (1.3 in)
1988
48.3 mm (1.9 in)
1989
29.0 mm (1.1 in)
1990
30.5 mm (1.2 in)
1991
21.8 mm (0.9 in)
1992
31.0 mm (1.2 in)
1993
32.0 mm (1.3 in)
1994
21.6 mm (0.9 in)
1995
15.0 mm (0.6 in)
1996
13.0 mm (0.5 in)
1997
22.1 mm (0.9 in)
1998
28.7 mm (1.1 in)
1999
22.9 mm (0.9 in)
2000
17.5 mm (0.7 in)
2001
10.7 mm (0.4 in)
2002
25.4 mm (1.0 in)
2003
26.7 mm (1.1 in)
2005
14.0 mm (0.6 in)
2006
32.5 mm (1.3 in)
2007
22.4 mm (0.9 in)
2008
23.4 mm (0.9 in)
2009
29.2 mm (1.1 in)
2010
25.1 mm (1.0 in)
2011
44.2 mm (1.7 in)
2012
15.2 mm (0.6 in)
2013
18.0 mm (0.7 in)
2014
19.8 mm (0.8 in)
2015
20.1 mm (0.8 in)
2016
38.1 mm (1.5 in)
2017
6.4 mm (0.25 in)
2018
32.8 mm (1.3 in)
2019
26.2 mm (1.0 in)
2020
16.8 mm (0.7 in)
2021
22.4 mm (0.9 in)
2022
24.6 mm (1.0 in)
2023
32.5 mm (1.3 in)
2024
32.0 mm (1.3 in)
2025
25.9 mm (1.0 in)
2026
16.3 mm (0.6 in)
Wettest five days (Rx5day)
The wettest five days of the year at Shell, 1958 to 2026. The record is 88.9 mm (3.5 in) in 1988, marked on the chart; the median year is 34.9 mm (1.4 in).
Wettest five days (Rx5day) at Shell by year
Year
Wettest five days (Rx5day)
1958
13.7 mm (0.5 in)
1959
24.4 mm (1.0 in)
1960
28.7 mm (1.1 in)
1961
41.4 mm (1.6 in)
1962
21.8 mm (0.9 in)
1963
34.0 mm (1.3 in)
1964
44.5 mm (1.8 in)
1965
31.3 mm (1.2 in)
1966
22.9 mm (0.9 in)
1967
45.1 mm (1.8 in)
1968
45.0 mm (1.8 in)
1969
78.5 mm (3.1 in)
1970
25.1 mm (1.0 in)
1971
49.0 mm (1.9 in)
1972
42.6 mm (1.7 in)
1973
51.6 mm (2.0 in)
1974
32.3 mm (1.3 in)
1975
40.6 mm (1.6 in)
1977
4.0 mm (0.16 in)
1978
44.0 mm (1.7 in)
1980
7.6 mm (0.30 in)
1981
36.3 mm (1.4 in)
1982
74.2 mm (2.9 in)
1983
27.7 mm (1.1 in)
1984
51.8 mm (2.0 in)
1985
30.1 mm (1.2 in)
1986
33.1 mm (1.3 in)
1987
61.2 mm (2.4 in)
1988
88.9 mm (3.5 in)
1989
48.3 mm (1.9 in)
1990
32.0 mm (1.3 in)
1991
31.8 mm (1.3 in)
1992
59.5 mm (2.3 in)
1993
14.0 mm (0.6 in)
1994
18.8 mm (0.7 in)
1995
24.5 mm (1.0 in)
1996
30.0 mm (1.2 in)
1997
54.1 mm (2.1 in)
1998
44.9 mm (1.8 in)
1999
31.2 mm (1.2 in)
2000
26.2 mm (1.0 in)
2001
30.3 mm (1.2 in)
2002
31.5 mm (1.2 in)
2003
38.9 mm (1.5 in)
2005
28.5 mm (1.1 in)
2006
49.0 mm (1.9 in)
2007
32.1 mm (1.3 in)
2008
55.5 mm (2.2 in)
2009
44.6 mm (1.8 in)
2010
61.7 mm (2.4 in)
2011
65.0 mm (2.6 in)
2012
25.9 mm (1.0 in)
2013
30.5 mm (1.2 in)
2014
29.0 mm (1.1 in)
2015
27.8 mm (1.1 in)
2016
56.9 mm (2.2 in)
2017
6.4 mm (0.25 in)
2018
39.1 mm (1.5 in)
2019
46.8 mm (1.8 in)
2020
22.1 mm (0.9 in)
2021
48.0 mm (1.9 in)
2022
35.8 mm (1.4 in)
2023
44.5 mm (1.8 in)
2024
37.0 mm (1.5 in)
2025
46.8 mm (1.8 in)
2026
17.6 mm (0.7 in)
Longest dry spell (CDD)
The longest dry spell of the year at Shell, 1958 to 2026. The record is 82 days in 1975, marked on the chart; the median year is 37 days.
Longest dry spell (CDD) at Shell by year
Year
Longest dry spell (CDD)
1958
16 days
1959
39 days
1960
53 days
1961
42 days
1962
51 days
1963
53 days
1964
47 days
1965
58 days
1966
35 days
1967
36 days
1968
32 days
1969
58 days
1970
23 days
1971
31 days
1972
23 days
1973
35 days
1974
54 days
1975
82 days
1977
13 days
1978
20 days
1980
39 days
1981
48 days
1982
29 days
1983
41 days
1984
30 days
1985
29 days
1986
42 days
1987
34 days
1988
50 days
1989
34 days
1990
42 days
1991
37 days
1992
51 days
1993
30 days
1994
26 days
1995
33 days
1996
43 days
1997
42 days
1998
26 days
1999
55 days
2000
35 days
2001
30 days
2002
41 days
2003
66 days
2005
30 days
2006
37 days
2007
29 days
2008
39 days
2009
39 days
2010
29 days
2011
35 days
2012
46 days
2013
34 days
2014
39 days
2015
40 days
2016
41 days
2017
13 days
2018
32 days
2019
26 days
2020
47 days
2021
43 days
2022
31 days
2023
31 days
2024
28 days
2025
40 days
2026
24 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
34 years with a frost
Across 34 years with a frost, the median last spring frost at Shell falls on 21 May and the median first autumn frost on 15 September, which leaves a median of 116 days between them.
Fitted over all years, the growing season changes by +6.2 days per decade at this station.
Frost dates and growing season at Shell
Measure
Median, all years
Earliest period
Recent period (1984 to 2025)
Recent against earliest
Fitted trend
Last spring frost
21 May
n/a
20 May
n/a
-0.3 days per decade
First autumn frost
15 September
n/a
17 September
n/a
+5.9 days per decade
Growing days
116 days
n/a
118 days
n/a
+6.2 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
45 years, 1959 to 2025
A day with at least 24.0 mm (0.9 in) of rain is expected about once in 2 years. A day with at least 50.2 mm (2.0 in) of rain is expected about once in 100 years.
Rainfall return levels at Shell: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
24.0 mm (0.9 in)
5 years
30.8 mm (1.2 in)
10 years
35.3 mm (1.4 in)
25 years
41.2 mm (1.6 in)
50 years
45.7 mm (1.8 in)
Longer than the 45 years of record
100 years
50.2 mm (2.0 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 1959 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: 48.3 mm (1.9 in) in 1988; 44.2 mm (1.7 in) in 2011; 43.2 mm (1.7 in) in 1964.
Download the Data
Data for Shell standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Shell 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.