Record envelope, standing records and threshold days for Greybull (USC00484080), Wyoming, United States, with 69 years of record.
Key Facts for Greybull
Greybull (USC00484080) is a weather station in Wyoming, United States at 44.49 latitude and -108.05 longitude, 1,154 m (3,787 ft) above sea level.
The station reports from 1951 to 2019, 69 years of record.
1,464 records set at Greybull still stand.
Records are tracked for prcp, snow, snwd: an element needs 30 years of data to be eligible.
Greybull set a daily record snow depth of 5.1 cm (2.0 in) on 14 October 2018.
About the Station
Location: Wyoming, United States, 44.49 latitude, -108.05 longitude.
Elevation: 1,154 m (3,787 ft).
Period of record: 1951 to 2019, 69 years.
Eligible elements: 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 Greybull. 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 Greybull, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
12.8 C (55.0 F)
-37.8 C (-36.0 F)
n/a
n/a
Feb
18.9 C (66.0 F)
-39.4 C (-38.9 F)
n/a
n/a
Mar
27.2 C (81.0 F)
-30.6 C (-23.1 F)
n/a
n/a
Apr
32.2 C (90.0 F)
-14.4 C (6.1 F)
n/a
n/a
May
35.6 C (96.1 F)
-7.2 C (19.0 F)
n/a
n/a
Jun
42.8 C (109.0 F)
0.6 C (33.1 F)
n/a
n/a
Jul
42.8 C (109.0 F)
3.9 C (39.0 F)
n/a
n/a
Aug
41.7 C (107.1 F)
0.6 C (33.1 F)
n/a
n/a
Sep
37.2 C (99.0 F)
-4.4 C (24.1 F)
n/a
n/a
Oct
33.3 C (91.9 F)
-20.0 C (-4.0 F)
n/a
n/a
Nov
23.3 C (73.9 F)
-30.6 C (-23.1 F)
n/a
n/a
Dec
20.6 C (69.1 F)
-38.3 C (-36.9 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Greybull still stand. 1989 holds the most, with 70.
Standing records at Greybull by the year they were set
Year set
Standing records
1976
6
1977
15
1978
26
1987
26
1988
62
1989
70
1990
52
1991
51
1992
49
1993
54
1994
48
1995
48
1996
52
1997
63
1998
49
1999
62
2000
52
2001
45
2002
48
2003
65
2004
36
2005
21
2006
16
2007
6
2008
37
2010
41
2011
27
2012
55
2013
40
2014
52
2015
48
2016
51
2017
27
2018
52
2019
12
All-Time Record Progression
1 new records
1 all-time records were set at Greybull between 7 May 1988 and 7 May 1988. Each dot is a new record.
When Greybull set new all-time records
Date
Kind
Detail
1988-05-07
Record daily precipitation
Record daily precipitation 69.9 mm (2.8 in)
Wettest Day of Each Month
May: 69.9 mm (2.8 in)
The wettest day on record for each calendar month at Greybull. The most was 69.9 mm (2.8 in) on 7 May 1988.
Record daily precipitation for each month at Greybull
Month
Record daily precipitation (mm)
Date
Jan
27.9 mm (1.1 in)
3 January 1996
Feb
38.1 mm (1.5 in)
11 February 1984
Mar
38.1 mm (1.5 in)
26 March 1975
Apr
29.7 mm (1.2 in)
16 April 1959
May
69.9 mm (2.8 in)
7 May 1988
Jun
45.7 mm (1.8 in)
23 June 1976
Jul
26.7 mm (1.1 in)
3 July 1993
Aug
20.8 mm (0.8 in)
29 August 1964
Sep
39.6 mm (1.6 in)
20 September 2004
Oct
47.0 mm (1.9 in)
7 October 2011
Nov
43.2 mm (1.7 in)
23 November 2002
Dec
38.1 mm (1.5 in)
11 December 1975
Period of Record Coverage
1976 to 2019
Complete yearUnder 90 percent of days
35 years of record at Greybull, 1976 to 2019. 12 years have data for under 90 percent of days and are left out of rankings: 1976, 1977, 1978, 1987, 1995, 2004, 2005, 2006 and others.
Cooler than the station meanWarmer than the station mean
One stripe for each of 21 complete years at Greybull, 1989 to 2018. Blue stripes are years cooler than the station's own mean of 7.7 C (45.9 F); red stripes are warmer. The coolest year was 1993, at 6.0 C (42.7 F), and the warmest was 2012, at 9.0 C (48.2 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Greybull as warming stripes, 1989 to 2018
Year
Annual mean temperature
Difference from the station mean
1989
7.2 C
-0.49 C
1990
8.5 C
+0.75 C
1991
7.8 C
+0.06 C
1992
8.3 C
+0.64 C
1993
6.0 C
-1.75 C
1994
8.8 C
+1.08 C
1996
6.4 C
-1.30 C
1997
7.8 C
+0.10 C
1998
8.6 C
+0.90 C
1999
8.7 C
+1.02 C
2000
7.6 C
-0.10 C
2001
8.1 C
+0.42 C
2002
6.7 C
-0.99 C
2010
7.4 C
-0.35 C
2011
6.6 C
-1.11 C
2012
9.0 C
+1.29 C
2013
6.9 C
-0.79 C
2014
6.7 C
-1.05 C
2015
8.5 C
+0.81 C
2016
8.8 C
+1.10 C
2018
7.4 C
-0.34 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 2019
Yearly extremes at Greybull: the record and the median year
Measure
Record
Year of the record
Median year
Years with a value
Hottest day (TXx)
42.8 C (109.0 F)
2010
38.3 C (100.9 F)
35
Coldest night (TNn)
-39.4 C (-38.9 F)
1996
-30.0 C (-22.0 F)
35
Wettest day (Rx1day)
69.9 mm (2.8 in)
1988
20.3 mm (0.8 in)
68
Wettest five days (Rx5day)
69.9 mm (2.8 in)
1988
28.6 mm (1.1 in)
68
Longest dry spell (CDD)
118 days
1983
47 days
68
Hottest day (TXx)
The hottest day of the year at Greybull, 1951 to 2019. The record is 42.8 C (109.0 F) in 2010, marked on the chart; the median year is 38.3 C (100.9 F).
Hottest day (TXx) at Greybull 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
37.8 C (100.0 F)
1977
26.7 C (80.1 F)
1978
23.9 C (75.0 F)
1979
n/a
1980
n/a
1981
n/a
1982
n/a
1983
n/a
1984
n/a
1985
n/a
1986
n/a
1987
35.0 C (95.0 F)
1988
38.3 C (100.9 F)
1989
40.0 C (104.0 F)
1990
38.3 C (100.9 F)
1991
37.2 C (99.0 F)
1992
36.1 C (97.0 F)
1993
37.2 C (99.0 F)
1994
35.6 C (96.1 F)
1995
40.0 C (104.0 F)
1996
37.8 C (100.0 F)
1997
37.2 C (99.0 F)
1998
40.0 C (104.0 F)
1999
39.4 C (102.9 F)
2000
39.4 C (102.9 F)
2001
39.4 C (102.9 F)
2002
41.7 C (107.1 F)
2003
39.4 C (102.9 F)
2004
36.1 C (97.0 F)
2005
40.6 C (105.1 F)
2006
39.4 C (102.9 F)
2007
22.2 C (72.0 F)
2008
37.8 C (100.0 F)
2010
42.8 C (109.0 F)
2011
40.0 C (104.0 F)
2012
40.6 C (105.1 F)
2013
37.8 C (100.0 F)
2014
38.3 C (100.9 F)
2015
37.8 C (100.0 F)
2016
40.0 C (104.0 F)
2017
33.9 C (93.0 F)
2018
41.7 C (107.1 F)
2019
30.6 C (87.1 F)
Coldest night (TNn)
The coldest night of the year at Greybull, 1951 to 2019. The record is -39.4 C (-38.9 F) in 1996, marked on the chart; the median year is -30.0 C (-22.0 F).
Coldest night (TNn) at Greybull 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
0.6 C (33.1 F)
1977
-1.7 C (28.9 F)
1978
-17.8 C (0.0 F)
1979
n/a
1980
n/a
1981
n/a
1982
n/a
1983
n/a
1984
n/a
1985
n/a
1986
n/a
1987
-22.2 C (-8.0 F)
1988
-30.0 C (-22.0 F)
1989
-38.3 C (-36.9 F)
1990
-37.8 C (-36.0 F)
1991
-36.1 C (-33.0 F)
1992
-28.3 C (-18.9 F)
1993
-32.8 C (-27.0 F)
1994
-27.2 C (-17.0 F)
1995
-24.4 C (-11.9 F)
1996
-39.4 C (-38.9 F)
1997
-37.8 C (-36.0 F)
1998
-28.3 C (-18.9 F)
1999
-21.1 C (-6.0 F)
2000
-26.1 C (-15.0 F)
2001
-32.2 C (-26.0 F)
2002
-27.2 C (-17.0 F)
2003
-27.2 C (-17.0 F)
2004
-35.0 C (-31.0 F)
2005
-28.9 C (-20.0 F)
2006
-13.3 C (8.1 F)
2007
-22.2 C (-8.0 F)
2008
-35.6 C (-32.1 F)
2010
-30.0 C (-22.0 F)
2011
-36.7 C (-34.1 F)
2012
-26.1 C (-15.0 F)
2013
-30.6 C (-23.1 F)
2014
-35.6 C (-32.1 F)
2015
-26.7 C (-16.1 F)
2016
-32.8 C (-27.0 F)
2017
-35.6 C (-32.1 F)
2018
-31.7 C (-25.1 F)
2019
-30.6 C (-23.1 F)
Wettest day (Rx1day)
The wettest day of the year at Greybull, 1951 to 2019. The record is 69.9 mm (2.8 in) in 1988, marked on the chart; the median year is 20.3 mm (0.8 in).
Wettest day (Rx1day) at Greybull by year
Year
Wettest day (Rx1day)
1951
17.8 mm (0.7 in)
1952
10.4 mm (0.4 in)
1953
13.5 mm (0.5 in)
1954
8.1 mm (0.32 in)
1955
20.8 mm (0.8 in)
1956
5.1 mm (0.20 in)
1957
12.4 mm (0.5 in)
1958
11.9 mm (0.5 in)
1959
29.7 mm (1.2 in)
1960
19.1 mm (0.8 in)
1961
22.6 mm (0.9 in)
1962
17.8 mm (0.7 in)
1963
20.1 mm (0.8 in)
1964
28.7 mm (1.1 in)
1965
28.4 mm (1.1 in)
1966
15.0 mm (0.6 in)
1967
20.1 mm (0.8 in)
1968
18.5 mm (0.7 in)
1969
30.5 mm (1.2 in)
1970
15.2 mm (0.6 in)
1971
31.0 mm (1.2 in)
1972
22.1 mm (0.9 in)
1973
20.3 mm (0.8 in)
1974
11.2 mm (0.4 in)
1975
38.1 mm (1.5 in)
1976
45.7 mm (1.8 in)
1977
15.7 mm (0.6 in)
1978
25.9 mm (1.0 in)
1979
16.8 mm (0.7 in)
1980
37.1 mm (1.5 in)
1981
29.5 mm (1.2 in)
1982
23.6 mm (0.9 in)
1983
25.7 mm (1.0 in)
1984
38.1 mm (1.5 in)
1985
25.4 mm (1.0 in)
1986
14.0 mm (0.6 in)
1987
41.9 mm (1.6 in)
1988
69.9 mm (2.8 in)
1989
21.3 mm (0.8 in)
1990
12.7 mm (0.5 in)
1991
25.7 mm (1.0 in)
1992
20.3 mm (0.8 in)
1993
29.2 mm (1.1 in)
1994
20.3 mm (0.8 in)
1995
13.5 mm (0.5 in)
1996
27.9 mm (1.1 in)
1997
22.9 mm (0.9 in)
1998
16.0 mm (0.6 in)
1999
17.8 mm (0.7 in)
2000
18.0 mm (0.7 in)
2001
26.2 mm (1.0 in)
2002
43.2 mm (1.7 in)
2003
12.7 mm (0.5 in)
2004
39.6 mm (1.6 in)
2005
14.2 mm (0.6 in)
2006
16.8 mm (0.7 in)
2007
9.9 mm (0.39 in)
2008
33.0 mm (1.3 in)
2010
13.7 mm (0.5 in)
2011
47.0 mm (1.9 in)
2012
8.4 mm (0.33 in)
2013
16.5 mm (0.6 in)
2014
22.9 mm (0.9 in)
2015
8.4 mm (0.33 in)
2016
35.1 mm (1.4 in)
2017
10.2 mm (0.4 in)
2018
21.3 mm (0.8 in)
2019
9.9 mm (0.39 in)
Wettest five days (Rx5day)
The wettest five days of the year at Greybull, 1951 to 2019. The record is 69.9 mm (2.8 in) in 1988, marked on the chart; the median year is 28.6 mm (1.1 in).
Wettest five days (Rx5day) at Greybull by year
Year
Wettest five days (Rx5day)
1951
28.7 mm (1.1 in)
1952
17.5 mm (0.7 in)
1953
13.7 mm (0.5 in)
1954
12.7 mm (0.5 in)
1955
32.7 mm (1.3 in)
1956
5.2 mm (0.20 in)
1957
28.4 mm (1.1 in)
1958
18.3 mm (0.7 in)
1959
58.2 mm (2.3 in)
1960
24.7 mm (1.0 in)
1961
27.7 mm (1.1 in)
1962
29.0 mm (1.1 in)
1963
26.9 mm (1.1 in)
1964
32.5 mm (1.3 in)
1965
31.5 mm (1.2 in)
1966
15.5 mm (0.6 in)
1967
28.2 mm (1.1 in)
1968
29.5 mm (1.2 in)
1969
57.2 mm (2.3 in)
1970
16.5 mm (0.6 in)
1971
37.6 mm (1.5 in)
1972
24.6 mm (1.0 in)
1973
25.9 mm (1.0 in)
1974
19.6 mm (0.8 in)
1975
64.8 mm (2.6 in)
1976
56.7 mm (2.2 in)
1977
23.0 mm (0.9 in)
1978
50.9 mm (2.0 in)
1979
32.0 mm (1.3 in)
1980
37.1 mm (1.5 in)
1981
37.2 mm (1.5 in)
1982
38.3 mm (1.5 in)
1983
30.7 mm (1.2 in)
1984
38.1 mm (1.5 in)
1985
27.2 mm (1.1 in)
1986
19.9 mm (0.8 in)
1987
57.1 mm (2.2 in)
1988
69.9 mm (2.8 in)
1989
29.9 mm (1.2 in)
1990
16.3 mm (0.6 in)
1991
40.4 mm (1.6 in)
1992
35.8 mm (1.4 in)
1993
43.4 mm (1.7 in)
1994
32.7 mm (1.3 in)
1995
17.8 mm (0.7 in)
1996
36.4 mm (1.4 in)
1997
52.4 mm (2.1 in)
1998
24.1 mm (0.9 in)
1999
23.1 mm (0.9 in)
2000
22.6 mm (0.9 in)
2001
39.9 mm (1.6 in)
2002
45.7 mm (1.8 in)
2003
16.8 mm (0.7 in)
2004
43.4 mm (1.7 in)
2005
23.9 mm (0.9 in)
2006
19.6 mm (0.8 in)
2007
22.9 mm (0.9 in)
2008
50.5 mm (2.0 in)
2010
41.6 mm (1.6 in)
2011
61.0 mm (2.4 in)
2012
13.8 mm (0.5 in)
2013
23.4 mm (0.9 in)
2014
24.4 mm (1.0 in)
2015
14.5 mm (0.6 in)
2016
53.1 mm (2.1 in)
2017
16.9 mm (0.7 in)
2018
24.7 mm (1.0 in)
2019
10.9 mm (0.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Greybull, 1951 to 2019. The record is 118 days in 1983, marked on the chart; the median year is 47 days.
Longest dry spell (CDD) at Greybull by year
Year
Longest dry spell (CDD)
1951
56 days
1952
95 days
1953
47 days
1954
44 days
1955
46 days
1956
45 days
1957
47 days
1958
40 days
1959
58 days
1960
49 days
1961
42 days
1962
51 days
1963
41 days
1964
51 days
1965
76 days
1966
60 days
1967
56 days
1968
46 days
1969
91 days
1970
39 days
1971
30 days
1972
34 days
1973
77 days
1974
53 days
1975
68 days
1976
38 days
1977
68 days
1978
34 days
1979
64 days
1980
30 days
1981
47 days
1982
36 days
1983
118 days
1984
42 days
1985
35 days
1986
55 days
1987
57 days
1988
75 days
1989
40 days
1990
48 days
1991
41 days
1992
66 days
1993
54 days
1994
44 days
1995
34 days
1996
47 days
1997
93 days
1998
58 days
1999
105 days
2000
48 days
2001
51 days
2002
52 days
2003
67 days
2004
35 days
2005
21 days
2006
70 days
2007
31 days
2008
90 days
2010
34 days
2011
34 days
2012
41 days
2013
31 days
2014
30 days
2015
30 days
2016
41 days
2017
41 days
2018
38 days
2019
43 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
21 years with a frost
Across 21 years with a frost, the median last spring frost at Greybull falls on 12 May and the median first autumn frost on 22 September, which leaves a median of 138 days between them.
Frost dates and growing season at Greybull
Measure
Median, all years
Earliest period
Recent period (1989 to 2018)
Recent against earliest
Fitted trend
Last spring frost
12 May
n/a
12 May
n/a
n/a
First autumn frost
22 September
n/a
22 September
n/a
n/a
Growing days
138 days
n/a
138 days
n/a
n/a
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
53 years, 1952 to 2018
A day with at least 20.5 mm (0.8 in) of rain is expected about once in 2 years. A day with at least 61.4 mm (2.4 in) of rain is expected about once in 100 years.
Rainfall return levels at Greybull: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
20.5 mm (0.8 in)
5 years
30.3 mm (1.2 in)
10 years
37.3 mm (1.5 in)
25 years
46.6 mm (1.8 in)
50 years
53.9 mm (2.1 in)
100 years
61.4 mm (2.4 in)
Longer than the 53 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, 53 years of values from 1952 to 2018.
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: 69.9 mm (2.8 in) in 1988; 45.7 mm (1.8 in) in 1976; 43.2 mm (1.7 in) in 2002.
Download the Data
Data for Greybull standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Greybull 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.