Record envelope, standing records and threshold days for Powell Fld STN (USC00487388), Wyoming, United States, with 46 years of record.
Key Facts for Powell Fld STN
Powell Fld STN (USC00487388) is a weather station in Wyoming, United States at 44.78 latitude and -108.76 longitude, 1,333 m (4,372 ft) above sea level.
The station reports from 1981 to 2026, 46 years of record.
1,464 records set at Powell Fld STN still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Powell Fld STN set a daily record precipitation of 10.9 mm (0.4 in) on 26 June 2026.
About the Station
Location: Wyoming, United States, 44.78 latitude, -108.76 longitude.
Elevation: 1,333 m (4,372 ft).
Period of record: 1981 to 2026, 46 years.
Eligible elements: tmax, tmin, prcp, snow, snwd.
Daily Record Envelope and 2026
35 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 Powell Fld STN. The lines show the 2026 daily maximum and minimum. 35 days in 2026 matched or passed a record. Temperatures are in degrees Celsius.
Daily record high and record low at Powell Fld STN, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
18.9 C (66.0 F)
-32.8 C (-27.0 F)
18.9 C (66.0 F)
-17.8 C (0.0 F)
Feb
21.1 C (70.0 F)
-36.1 C (-33.0 F)
21.1 C (70.0 F)
-18.3 C (-0.9 F)
Mar
27.2 C (81.0 F)
-30.0 C (-22.0 F)
n/a
n/a
Apr
29.4 C (84.9 F)
-19.4 C (-2.9 F)
25.6 C (78.1 F)
-16.1 C (3.0 F)
May
33.9 C (93.0 F)
-7.8 C (18.0 F)
n/a
n/a
Jun
40.0 C (104.0 F)
-1.7 C (28.9 F)
n/a
n/a
Jul
40.0 C (104.0 F)
-1.1 C (30.0 F)
32.8 C (91.0 F)
15.0 C (59.0 F)
Aug
38.9 C (102.0 F)
0.0 C (32.0 F)
n/a
n/a
Sep
38.9 C (102.0 F)
-8.9 C (16.0 F)
n/a
n/a
Oct
34.4 C (93.9 F)
-20.6 C (-5.1 F)
n/a
n/a
Nov
25.6 C (78.1 F)
-27.8 C (-18.0 F)
n/a
n/a
Dec
20.6 C (69.1 F)
-36.7 C (-34.1 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Powell Fld STN still stand. 2024 holds the most, with 104.
Standing records at Powell Fld STN by the year they were set
Year set
Standing records
1981
13
1982
28
1983
37
1984
35
1985
65
1986
33
1987
37
1988
37
1989
36
1990
39
1991
28
1992
29
1993
26
1994
13
1995
25
1996
30
1997
32
1998
15
1999
26
2000
20
2001
16
2002
26
2003
48
2004
22
2005
24
2006
50
2007
16
2008
28
2009
31
2010
11
2011
16
2012
28
2013
31
2014
31
2015
16
2016
30
2017
25
2018
26
2019
39
2020
38
2021
33
2022
26
2023
21
2024
104
2025
69
2026
55
Wettest Day of Each Month
Jun: 52.8 mm (2.1 in)
The wettest day on record for each calendar month at Powell Fld STN. The most was 52.8 mm (2.1 in) on 4 June 1991.
Record daily precipitation for each month at Powell Fld STN
Month
Record daily precipitation (mm)
Date
Jan
12.7 mm (0.5 in)
12 January 1998
Feb
8.9 mm (0.35 in)
7 February 2020
Mar
15.5 mm (0.6 in)
12 March 1995
Apr
20.8 mm (0.8 in)
27 April 1989
May
44.5 mm (1.8 in)
27 May 1987
Jun
52.8 mm (2.1 in)
4 June 1991
Jul
27.9 mm (1.1 in)
4 July 1993
Aug
21.8 mm (0.9 in)
8 August 2023
Sep
24.6 mm (1.0 in)
2 September 1986
Oct
32.0 mm (1.3 in)
12 October 2000
Nov
10.9 mm (0.4 in)
15 November 2010
Dec
11.7 mm (0.5 in)
4 December 1985
Period of Record Coverage
1981 to 2026
Complete yearUnder 90 percent of days
46 years of record at Powell Fld STN, 1981 to 2026. 5 years have data for under 90 percent of days and are left out of rankings: 1981, 2023, 2024, 2025, 2026.
Cooler than the station meanWarmer than the station mean
One stripe for each of 37 complete years at Powell Fld STN, 1982 to 2021. Blue stripes are years cooler than the station's own mean of 6.7 C (44.1 F); red stripes are warmer. The coolest year was 2019, at 4.7 C (40.4 F), and the warmest was 2016, at 8.4 C (47.0 F). The strongest colour marks a difference of 2.1 C (3.8 F).
Annual mean temperature at Powell Fld STN as warming stripes, 1982 to 2021
Year
Annual mean temperature
Difference from the station mean
1982
6.1 C
-0.61 C
1983
6.5 C
-0.25 C
1984
5.8 C
-0.88 C
1985
4.7 C
-2.06 C
1986
6.6 C
-0.08 C
1987
7.8 C
+1.09 C
1988
7.7 C
+0.93 C
1989
6.1 C
-0.66 C
1990
7.1 C
+0.36 C
1991
6.8 C
+0.05 C
1992
7.4 C
+0.67 C
1993
5.1 C
-1.63 C
1994
7.5 C
+0.76 C
1995
7.0 C
+0.31 C
1996
5.8 C
-0.91 C
1997
7.0 C
+0.29 C
1999
8.1 C
+1.36 C
2000
7.0 C
+0.25 C
2001
7.9 C
+1.13 C
2002
6.2 C
-0.48 C
2003
7.8 C
+1.11 C
2004
7.5 C
+0.74 C
2005
7.2 C
+0.47 C
2008
6.0 C
-0.77 C
2009
5.7 C
-1.05 C
2010
6.6 C
-0.13 C
2011
5.7 C
-0.99 C
2012
8.4 C
+1.64 C
2013
6.0 C
-0.73 C
2014
6.1 C
-0.60 C
2015
8.1 C
+1.33 C
2016
8.4 C
+1.64 C
2017
6.9 C
+0.22 C
2018
5.6 C
-1.14 C
2019
4.7 C
-2.07 C
2020
6.6 C
-0.12 C
2021
7.4 C
+0.68 C
The fitted trend in annual mean temperature here over 1982 to 2021 is 0.05 C (-0.23 to 0.33) per decade. The interval includes zero, so the trend is not clearly different from zero. In Fahrenheit: 0.1 F (-0.4 to 0.6) per decade. The slope is a straight line fitted to 37 complete years; the brackets give its 95 percent interval.
Fitted temperature trends per decade at Powell Fld STN
Measure
Per decade (C)
Per decade (F)
Period
Complete years
Reading
Annual mean temperature
0.05 C (-0.23 to 0.33) per decade
0.1 F (-0.4 to 0.6) per decade
1982 to 2021
37
Not clearly different from zero
Mean daily maximum
-0.03 C (-0.34 to 0.27) per decade
-0.1 F (-0.6 to 0.5) per decade
1982 to 2021
37
Not clearly different from zero
Mean daily minimum
0.1 C (-0.1 to 0.4) per decade
0.2 F (-0.3 to 0.7) per decade
1982 to 2021
37
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
1981 to 2026
Yearly extremes at Powell Fld STN: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
40.0 C (104.0 F)
1988
36.7 C (98.1 F)
46
Coldest night (TNn)
-36.7 C (-34.1 F)
1990
-28.3 C (-18.9 F)
46
Wettest day (Rx1day)
52.8 mm (2.1 in)
1991
20.8 mm (0.8 in)
46
Wettest five days (Rx5day)
74.1 mm (2.9 in)
1991
28.2 mm (1.1 in)
45
Longest dry spell (CDD)
92 days
1984
43 days
46
Hottest day (TXx)
The hottest day of the year at Powell Fld STN, 1981 to 2026. The record is 40.0 C (104.0 F) in 1988, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Powell Fld STN by year
Year
Hottest day (TXx)
1981
36.1 C (97.0 F)
1982
35.0 C (95.0 F)
1983
37.2 C (99.0 F)
1984
36.1 C (97.0 F)
1985
38.3 C (100.9 F)
1986
34.4 C (93.9 F)
1987
35.0 C (95.0 F)
1988
40.0 C (104.0 F)
1989
39.4 C (102.9 F)
1990
36.7 C (98.1 F)
1991
37.8 C (100.0 F)
1992
35.0 C (95.0 F)
1993
33.9 C (93.0 F)
1994
35.6 C (96.1 F)
1995
37.8 C (100.0 F)
1996
35.6 C (96.1 F)
1997
33.9 C (93.0 F)
1998
37.2 C (99.0 F)
1999
35.6 C (96.1 F)
2000
36.7 C (98.1 F)
2001
38.3 C (100.9 F)
2002
40.0 C (104.0 F)
2003
38.9 C (102.0 F)
2004
36.7 C (98.1 F)
2005
38.9 C (102.0 F)
2006
38.3 C (100.9 F)
2007
36.7 C (98.1 F)
2008
36.7 C (98.1 F)
2009
33.9 C (93.0 F)
2010
37.2 C (99.0 F)
2011
35.6 C (96.1 F)
2012
37.8 C (100.0 F)
2013
33.9 C (93.0 F)
2014
35.6 C (96.1 F)
2015
35.0 C (95.0 F)
2016
36.1 C (97.0 F)
2017
35.0 C (95.0 F)
2018
37.2 C (99.0 F)
2019
35.0 C (95.0 F)
2020
35.6 C (96.1 F)
2021
38.3 C (100.9 F)
2022
36.7 C (98.1 F)
2023
36.1 C (97.0 F)
2024
38.9 C (102.0 F)
2025
36.7 C (98.1 F)
2026
32.8 C (91.0 F)
Coldest night (TNn)
The coldest night of the year at Powell Fld STN, 1981 to 2026. The record is -36.7 C (-34.1 F) in 1990, marked on the chart; the median year is -28.3 C (-18.9 F).
Coldest night (TNn) at Powell Fld STN by year
Year
Coldest night (TNn)
1981
-20.6 C (-5.1 F)
1982
-30.0 C (-22.0 F)
1983
-35.0 C (-31.0 F)
1984
-32.2 C (-26.0 F)
1985
-30.0 C (-22.0 F)
1986
-27.2 C (-17.0 F)
1987
-23.9 C (-11.0 F)
1988
-26.7 C (-16.1 F)
1989
-36.1 C (-33.0 F)
1990
-36.7 C (-34.1 F)
1991
-25.6 C (-14.1 F)
1992
-25.6 C (-14.1 F)
1993
-27.8 C (-18.0 F)
1994
-28.9 C (-20.0 F)
1995
-23.3 C (-9.9 F)
1996
-35.0 C (-31.0 F)
1997
-31.7 C (-25.1 F)
1998
-29.4 C (-20.9 F)
1999
-20.6 C (-5.1 F)
2000
-26.1 C (-15.0 F)
2001
-23.9 C (-11.0 F)
2002
-23.9 C (-11.0 F)
2003
-25.6 C (-14.1 F)
2004
-29.4 C (-20.9 F)
2005
-28.9 C (-20.0 F)
2006
-26.7 C (-16.1 F)
2007
-25.6 C (-14.1 F)
2008
-28.3 C (-18.9 F)
2009
-31.7 C (-25.1 F)
2010
-27.2 C (-17.0 F)
2011
-28.3 C (-18.9 F)
2012
-21.7 C (-7.1 F)
2013
-28.9 C (-20.0 F)
2014
-35.0 C (-31.0 F)
2015
-25.0 C (-13.0 F)
2016
-30.0 C (-22.0 F)
2017
-30.0 C (-22.0 F)
2018
-27.8 C (-18.0 F)
2019
-30.0 C (-22.0 F)
2020
-21.7 C (-7.1 F)
2021
-31.7 C (-25.1 F)
2022
-28.3 C (-18.9 F)
2023
-30.0 C (-22.0 F)
2024
-30.6 C (-23.1 F)
2025
-33.3 C (-27.9 F)
2026
-18.3 C (-0.9 F)
Wettest day (Rx1day)
The wettest day of the year at Powell Fld STN, 1981 to 2026. The record is 52.8 mm (2.1 in) in 1991, marked on the chart; the median year is 20.8 mm (0.8 in).
Wettest day (Rx1day) at Powell Fld STN by year
Year
Wettest day (Rx1day)
1981
19.8 mm (0.8 in)
1982
16.5 mm (0.6 in)
1983
17.0 mm (0.7 in)
1984
9.9 mm (0.39 in)
1985
17.3 mm (0.7 in)
1986
24.6 mm (1.0 in)
1987
44.5 mm (1.8 in)
1988
42.2 mm (1.7 in)
1989
20.8 mm (0.8 in)
1990
21.1 mm (0.8 in)
1991
52.8 mm (2.1 in)
1992
27.4 mm (1.1 in)
1993
27.9 mm (1.1 in)
1994
18.5 mm (0.7 in)
1995
29.0 mm (1.1 in)
1996
20.8 mm (0.8 in)
1997
27.9 mm (1.1 in)
1998
14.2 mm (0.6 in)
1999
15.0 mm (0.6 in)
2000
32.0 mm (1.3 in)
2001
36.3 mm (1.4 in)
2002
8.9 mm (0.35 in)
2003
12.7 mm (0.5 in)
2004
7.6 mm (0.30 in)
2005
14.7 mm (0.6 in)
2006
14.2 mm (0.6 in)
2007
25.4 mm (1.0 in)
2008
22.9 mm (0.9 in)
2009
17.5 mm (0.7 in)
2010
10.9 mm (0.4 in)
2011
21.6 mm (0.9 in)
2012
21.1 mm (0.8 in)
2013
17.5 mm (0.7 in)
2014
19.1 mm (0.8 in)
2015
16.8 mm (0.7 in)
2016
20.8 mm (0.8 in)
2017
20.8 mm (0.8 in)
2018
22.4 mm (0.9 in)
2019
22.6 mm (0.9 in)
2020
10.7 mm (0.4 in)
2021
18.3 mm (0.7 in)
2022
21.6 mm (0.9 in)
2023
25.4 mm (1.0 in)
2024
25.4 mm (1.0 in)
2025
18.0 mm (0.7 in)
2026
11.9 mm (0.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Powell Fld STN, 1981 to 2026. The record is 74.1 mm (2.9 in) in 1991, marked on the chart; the median year is 28.2 mm (1.1 in).
Wettest five days (Rx5day) at Powell Fld STN by year
Year
Wettest five days (Rx5day)
1981
36.9 mm (1.5 in)
1982
45.9 mm (1.8 in)
1983
36.0 mm (1.4 in)
1984
20.9 mm (0.8 in)
1985
21.9 mm (0.9 in)
1986
26.4 mm (1.0 in)
1987
70.0 mm (2.8 in)
1988
67.1 mm (2.6 in)
1989
27.6 mm (1.1 in)
1990
29.5 mm (1.2 in)
1991
74.1 mm (2.9 in)
1992
53.5 mm (2.1 in)
1993
46.2 mm (1.8 in)
1994
18.5 mm (0.7 in)
1995
32.3 mm (1.3 in)
1996
40.0 mm (1.6 in)
1997
51.0 mm (2.0 in)
1998
23.9 mm (0.9 in)
1999
27.3 mm (1.1 in)
2000
32.0 mm (1.3 in)
2001
n/a
2002
0.5 mm (0.02 in)
2003
8.7 mm (0.34 in)
2004
8.1 mm (0.32 in)
2005
44.2 mm (1.7 in)
2006
23.8 mm (0.9 in)
2007
28.7 mm (1.1 in)
2008
44.3 mm (1.7 in)
2009
30.9 mm (1.2 in)
2010
15.8 mm (0.6 in)
2011
41.4 mm (1.6 in)
2012
21.4 mm (0.8 in)
2013
26.5 mm (1.0 in)
2014
24.2 mm (1.0 in)
2015
23.5 mm (0.9 in)
2016
22.7 mm (0.9 in)
2017
27.7 mm (1.1 in)
2018
46.3 mm (1.8 in)
2019
35.5 mm (1.4 in)
2020
10.7 mm (0.4 in)
2021
25.1 mm (1.0 in)
2022
31.8 mm (1.3 in)
2023
45.7 mm (1.8 in)
2024
26.7 mm (1.1 in)
2025
28.2 mm (1.1 in)
2026
14.8 mm (0.6 in)
Longest dry spell (CDD)
The longest dry spell of the year at Powell Fld STN, 1981 to 2026. The record is 92 days in 1984, marked on the chart; the median year is 43 days.
Longest dry spell (CDD) at Powell Fld STN by year
Year
Longest dry spell (CDD)
1981
31 days
1982
47 days
1983
41 days
1984
92 days
1985
64 days
1986
62 days
1987
43 days
1988
41 days
1989
29 days
1990
64 days
1991
41 days
1992
61 days
1993
75 days
1994
33 days
1995
36 days
1996
37 days
1997
54 days
1998
73 days
1999
91 days
2000
43 days
2001
2 days
2002
31 days
2003
31 days
2004
10 days
2005
39 days
2006
38 days
2007
35 days
2008
65 days
2009
83 days
2010
66 days
2011
27 days
2012
50 days
2013
42 days
2014
32 days
2015
63 days
2016
89 days
2017
38 days
2018
37 days
2019
69 days
2020
53 days
2021
66 days
2022
73 days
2023
57 days
2024
30 days
2025
43 days
2026
29 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
37 years with a frost
Across 37 years with a frost, the median last spring frost at Powell Fld STN falls on 14 May and the median first autumn frost on 19 September, which leaves a median of 124 days between them.
Fitted over all years, the growing season changes by -2.4 days per decade at this station.
Frost dates and growing season at Powell Fld STN
Measure
Median, all years
Earliest period
Recent period (1989 to 2021)
Recent against earliest
Fitted trend
Last spring frost
14 May
n/a
14 May
n/a
+1.6 days per decade
First autumn frost
19 September
n/a
19 September
n/a
-0.7 days per decade
Growing days
124 days
n/a
127 days
n/a
-2.4 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
37 years, 1982 to 2024
A day with at least 20.3 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 53.5 mm (2.1 in) of rain is expected about once in 100 years.
Rainfall return levels at Powell Fld STN: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
20.3 mm (0.8 in)
5 years
27.5 mm (1.1 in)
10 years
32.8 mm (1.3 in)
25 years
40.4 mm (1.6 in)
50 years
46.7 mm (1.8 in)
Longer than the 37 years of record
100 years
53.5 mm (2.1 in)
Longer than the 37 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, 37 years of values from 1982 to 2024.
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: 52.8 mm (2.1 in) in 1991; 44.5 mm (1.8 in) in 1987; 42.2 mm (1.7 in) in 1988.
Download the Data
Data for Powell Fld STN standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Powell Fld STN 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.