Record envelope, standing records and threshold days for Keeline 3 W (USC00485085), Wyoming, United States, with 35 years of record.
Key Facts for Keeline 3 W
Keeline 3 W (USC00485085) is a weather station in Wyoming, United States at 42.77 latitude and -104.78 longitude, 1,609 m (5,280 ft) above sea level.
The station reports from 1953 to 1987, 35 years of record.
1,464 records set at Keeline 3 W still stand.
Records are tracked for tmax, tmin, prcp, snow, snwd: an element needs 30 years of data to be eligible.
Keeline 3 W set a daily record precipitation of 6.1 mm (0.24 in) on 27 February 1987.
About the Station
Location: Wyoming, United States, 42.77 latitude, -104.78 longitude.
Elevation: 1,609 m (5,280 ft).
Period of record: 1953 to 1987, 35 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 Keeline 3 W. 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 Keeline 3 W, with 2026 drawn through them
Month
Highest record high
Lowest record low
2026 highest maximum
2026 lowest minimum
Jan
17.8 C (64.0 F)
-36.7 C (-34.1 F)
n/a
n/a
Feb
19.4 C (66.9 F)
-31.7 C (-25.1 F)
n/a
n/a
Mar
26.1 C (79.0 F)
-27.8 C (-18.0 F)
n/a
n/a
Apr
27.2 C (81.0 F)
-21.7 C (-7.1 F)
n/a
n/a
May
34.4 C (93.9 F)
-10.0 C (14.0 F)
n/a
n/a
Jun
36.7 C (98.1 F)
-2.8 C (27.0 F)
n/a
n/a
Jul
39.4 C (102.9 F)
-0.6 C (30.9 F)
n/a
n/a
Aug
38.9 C (102.0 F)
-0.6 C (30.9 F)
n/a
n/a
Sep
37.2 C (99.0 F)
-10.0 C (14.0 F)
n/a
n/a
Oct
30.0 C (86.0 F)
-17.8 C (0.0 F)
n/a
n/a
Nov
25.6 C (78.1 F)
-28.9 C (-20.0 F)
n/a
n/a
Dec
18.3 C (64.9 F)
-37.2 C (-35.0 F)
n/a
n/a
Which Years Hold Standing Records
1,464 standing records
Year with most
1,464 records at Keeline 3 W still stand. 1985 holds the most, with 74.
Standing records at Keeline 3 W by the year they were set
Year set
Standing records
1955
10
1956
51
1957
39
1958
52
1959
52
1960
52
1961
38
1962
59
1963
49
1964
47
1965
58
1966
57
1967
46
1968
36
1969
57
1970
30
1971
38
1972
54
1973
37
1974
32
1975
50
1976
51
1977
29
1978
51
1979
31
1980
49
1981
49
1982
33
1983
64
1984
39
1985
74
1986
46
1987
4
All-Time Record Progression
1 new records
1 all-time records were set at Keeline 3 W between 9 June 1986 and 9 June 1986. Each dot is a new record.
When Keeline 3 W set new all-time records
Date
Kind
Detail
1986-06-09
Record daily precipitation
Record daily precipitation 91.9 mm (3.6 in)
Wettest Day of Each Month
Jun: 91.9 mm (3.6 in)
The wettest day on record for each calendar month at Keeline 3 W. The most was 91.9 mm (3.6 in) on 9 June 1986.
Record daily precipitation for each month at Keeline 3 W
Month
Record daily precipitation (mm)
Date
Jan
16.0 mm (0.6 in)
28 January 1965
Feb
14.0 mm (0.6 in)
7 February 1969
Mar
37.3 mm (1.5 in)
18 March 1970
Apr
35.6 mm (1.4 in)
2 April 1964
May
70.6 mm (2.8 in)
23 May 1971
Jun
91.9 mm (3.6 in)
9 June 1986
Jul
71.1 mm (2.8 in)
13 July 1981
Aug
45.7 mm (1.8 in)
15 August 1976
Sep
45.2 mm (1.8 in)
2 September 1973
Oct
31.8 mm (1.3 in)
9 October 1982
Nov
18.0 mm (0.7 in)
8 November 1983
Dec
11.9 mm (0.5 in)
24 December 1982
Period of Record Coverage
1955 to 1987
Complete yearUnder 90 percent of days
33 years of record at Keeline 3 W, 1955 to 1987. 4 years have data for under 90 percent of days and are left out of rankings: 1955, 1975, 1976, 1987.
Cooler than the station meanWarmer than the station mean
One stripe for each of 25 complete years at Keeline 3 W, 1956 to 1986. Blue stripes are years cooler than the station's own mean of 7.3 C (45.1 F); red stripes are warmer. The coolest year was 1978, at 5.8 C (42.4 F), and the warmest was 1981, at 9.0 C (48.1 F). The strongest colour marks a difference of 1.8 C (3.2 F).
Annual mean temperature at Keeline 3 W as warming stripes, 1956 to 1986
Year
Annual mean temperature
Difference from the station mean
1956
7.8 C
+0.54 C
1957
6.8 C
-0.46 C
1958
7.7 C
+0.48 C
1960
7.7 C
+0.45 C
1962
7.4 C
+0.18 C
1963
8.4 C
+1.16 C
1964
6.6 C
-0.64 C
1965
6.8 C
-0.48 C
1966
7.6 C
+0.31 C
1967
7.0 C
-0.25 C
1968
7.1 C
-0.20 C
1971
6.6 C
-0.67 C
1972
6.7 C
-0.55 C
1973
6.9 C
-0.38 C
1974
7.8 C
+0.55 C
1977
7.7 C
+0.44 C
1978
5.8 C
-1.48 C
1979
6.7 C
-0.55 C
1980
7.8 C
+0.56 C
1981
9.0 C
+1.71 C
1982
6.6 C
-0.69 C
1983
7.3 C
+0.08 C
1984
7.1 C
-0.14 C
1985
6.7 C
-0.59 C
1986
7.9 C
+0.62 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
1953 to 1987
Yearly extremes at Keeline 3 W: 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
36.7 C (98.1 F)
33
Coldest night (TNn)
-37.2 C (-35.0 F)
1964
-29.4 C (-20.9 F)
33
Wettest day (Rx1day)
91.9 mm (3.6 in)
1986
26.9 mm (1.1 in)
35
Wettest five days (Rx5day)
125.9 mm (5.0 in)
1986
41.9 mm (1.6 in)
35
Longest dry spell (CDD)
70 days
1969
31 days
35
Hottest day (TXx)
The hottest day of the year at Keeline 3 W, 1953 to 1987. The record is 39.4 C (102.9 F) in 1985, marked on the chart; the median year is 36.7 C (98.1 F).
Hottest day (TXx) at Keeline 3 W by year
Year
Hottest day (TXx)
1953
n/a
1954
n/a
1955
14.4 C (57.9 F)
1956
35.6 C (96.1 F)
1957
35.0 C (95.0 F)
1958
36.7 C (98.1 F)
1959
36.1 C (97.0 F)
1960
36.7 C (98.1 F)
1961
36.7 C (98.1 F)
1962
34.4 C (93.9 F)
1963
36.1 C (97.0 F)
1964
37.2 C (99.0 F)
1965
36.7 C (98.1 F)
1966
37.8 C (100.0 F)
1967
37.2 C (99.0 F)
1968
35.6 C (96.1 F)
1969
37.8 C (100.0 F)
1970
35.6 C (96.1 F)
1971
35.6 C (96.1 F)
1972
36.7 C (98.1 F)
1973
37.8 C (100.0 F)
1974
36.1 C (97.0 F)
1975
37.2 C (99.0 F)
1976
36.7 C (98.1 F)
1977
37.2 C (99.0 F)
1978
37.2 C (99.0 F)
1979
38.9 C (102.0 F)
1980
38.3 C (100.9 F)
1981
38.3 C (100.9 F)
1982
37.8 C (100.0 F)
1983
37.8 C (100.0 F)
1984
34.4 C (93.9 F)
1985
39.4 C (102.9 F)
1986
37.8 C (100.0 F)
1987
15.0 C (59.0 F)
Coldest night (TNn)
The coldest night of the year at Keeline 3 W, 1953 to 1987. The record is -37.2 C (-35.0 F) in 1964, marked on the chart; the median year is -29.4 C (-20.9 F).
Coldest night (TNn) at Keeline 3 W by year
Year
Coldest night (TNn)
1953
n/a
1954
n/a
1955
-20.0 C (-4.0 F)
1956
-26.1 C (-15.0 F)
1957
-28.9 C (-20.0 F)
1958
-20.6 C (-5.1 F)
1959
-33.9 C (-29.0 F)
1960
-28.3 C (-18.9 F)
1961
-26.1 C (-15.0 F)
1962
-32.2 C (-26.0 F)
1963
-36.7 C (-34.1 F)
1964
-37.2 C (-35.0 F)
1965
-26.7 C (-16.1 F)
1966
-27.8 C (-18.0 F)
1967
-28.3 C (-18.9 F)
1968
-31.7 C (-25.1 F)
1969
-25.0 C (-13.0 F)
1970
-27.8 C (-18.0 F)
1971
-27.8 C (-18.0 F)
1972
-32.8 C (-27.0 F)
1973
-30.6 C (-23.1 F)
1974
-30.0 C (-22.0 F)
1975
-28.9 C (-20.0 F)
1976
-28.9 C (-20.0 F)
1977
-31.1 C (-24.0 F)
1978
-32.2 C (-26.0 F)
1979
-31.7 C (-25.1 F)
1980
-30.0 C (-22.0 F)
1981
-28.9 C (-20.0 F)
1982
-31.7 C (-25.1 F)
1983
-37.2 C (-35.0 F)
1984
-32.2 C (-26.0 F)
1985
-31.1 C (-24.0 F)
1986
-29.4 C (-20.9 F)
1987
-21.7 C (-7.1 F)
Wettest day (Rx1day)
The wettest day of the year at Keeline 3 W, 1953 to 1987. The record is 91.9 mm (3.6 in) in 1986, marked on the chart; the median year is 26.9 mm (1.1 in).
Wettest day (Rx1day) at Keeline 3 W by year
Year
Wettest day (Rx1day)
1953
20.3 mm (0.8 in)
1954
24.1 mm (0.9 in)
1955
26.2 mm (1.0 in)
1956
20.6 mm (0.8 in)
1957
38.4 mm (1.5 in)
1958
19.1 mm (0.8 in)
1959
22.4 mm (0.9 in)
1960
26.9 mm (1.1 in)
1961
17.8 mm (0.7 in)
1962
29.7 mm (1.2 in)
1963
22.6 mm (0.9 in)
1964
35.6 mm (1.4 in)
1965
44.5 mm (1.8 in)
1966
26.2 mm (1.0 in)
1967
38.1 mm (1.5 in)
1968
31.2 mm (1.2 in)
1969
22.4 mm (0.9 in)
1970
37.3 mm (1.5 in)
1971
70.6 mm (2.8 in)
1972
24.6 mm (1.0 in)
1973
45.2 mm (1.8 in)
1974
17.3 mm (0.7 in)
1975
17.3 mm (0.7 in)
1976
45.7 mm (1.8 in)
1977
18.8 mm (0.7 in)
1978
32.3 mm (1.3 in)
1979
38.1 mm (1.5 in)
1980
19.8 mm (0.8 in)
1981
71.1 mm (2.8 in)
1982
31.8 mm (1.3 in)
1983
20.3 mm (0.8 in)
1984
52.3 mm (2.1 in)
1985
31.2 mm (1.2 in)
1986
91.9 mm (3.6 in)
1987
13.0 mm (0.5 in)
Wettest five days (Rx5day)
The wettest five days of the year at Keeline 3 W, 1953 to 1987. The record is 125.9 mm (5.0 in) in 1986, marked on the chart; the median year is 41.9 mm (1.6 in).
Wettest five days (Rx5day) at Keeline 3 W by year
Year
Wettest five days (Rx5day)
1953
39.9 mm (1.6 in)
1954
26.7 mm (1.1 in)
1955
50.6 mm (2.0 in)
1956
27.2 mm (1.1 in)
1957
59.3 mm (2.3 in)
1958
36.9 mm (1.5 in)
1959
36.9 mm (1.5 in)
1960
35.6 mm (1.4 in)
1961
18.8 mm (0.7 in)
1962
77.7 mm (3.1 in)
1963
41.8 mm (1.6 in)
1964
52.8 mm (2.1 in)
1965
63.8 mm (2.5 in)
1966
28.7 mm (1.1 in)
1967
77.4 mm (3.0 in)
1968
76.7 mm (3.0 in)
1969
32.0 mm (1.3 in)
1970
55.3 mm (2.2 in)
1971
84.6 mm (3.3 in)
1972
36.9 mm (1.5 in)
1973
58.6 mm (2.3 in)
1974
17.5 mm (0.7 in)
1975
24.1 mm (0.9 in)
1976
60.3 mm (2.4 in)
1977
33.3 mm (1.3 in)
1978
43.2 mm (1.7 in)
1979
39.6 mm (1.6 in)
1980
41.9 mm (1.6 in)
1981
71.6 mm (2.8 in)
1982
51.3 mm (2.0 in)
1983
31.2 mm (1.2 in)
1984
58.4 mm (2.3 in)
1985
42.4 mm (1.7 in)
1986
125.9 mm (5.0 in)
1987
10.2 mm (0.4 in)
Longest dry spell (CDD)
The longest dry spell of the year at Keeline 3 W, 1953 to 1987. The record is 70 days in 1969, marked on the chart; the median year is 31 days.
Longest dry spell (CDD) at Keeline 3 W by year
Year
Longest dry spell (CDD)
1953
31 days
1954
56 days
1955
33 days
1956
43 days
1957
34 days
1958
36 days
1959
48 days
1960
29 days
1961
31 days
1962
35 days
1963
41 days
1964
41 days
1965
29 days
1966
34 days
1967
24 days
1968
28 days
1969
70 days
1970
37 days
1971
26 days
1972
17 days
1973
19 days
1974
29 days
1975
38 days
1976
47 days
1977
60 days
1978
33 days
1979
26 days
1980
36 days
1981
29 days
1982
23 days
1983
31 days
1984
21 days
1985
27 days
1986
31 days
1987
25 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
25 years with a frost
Across 25 years with a frost, the median last spring frost at Keeline 3 W falls on 23 May and the median first autumn frost on 16 September, which leaves a median of 113 days between them.
Fitted over all years, the growing season changes by -8.3 days per decade at this station.
Frost dates and growing season at Keeline 3 W
Measure
Median, all years
Earliest period
Recent period (1956 to 1986)
Recent against earliest
Fitted trend
Last spring frost
23 May
n/a
23 May
n/a
+6.1 days per decade
First autumn frost
16 September
n/a
16 September
n/a
-2.2 days per decade
Growing days
113 days
n/a
113 days
n/a
-8.3 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
33 years, 1954 to 1986
A day with at least 28.6 mm (1.1 in) of rain is expected about once in 2 years. A day with at least 109.0 mm (4.3 in) of rain is expected about once in 100 years.
Rainfall return levels at Keeline 3 W: the daily rain expected about once in a given number of years
Expected about once in
A day with at least
Note
2 years
28.6 mm (1.1 in)
5 years
42.0 mm (1.7 in)
10 years
53.4 mm (2.1 in)
25 years
71.7 mm (2.8 in)
50 years
88.6 mm (3.5 in)
Longer than the 33 years of record
100 years
109.0 mm (4.3 in)
Longer than the 33 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, 33 years of values from 1954 to 1986.
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 1986; 71.1 mm (2.8 in) in 1981; 70.6 mm (2.8 in) in 1971.
Download the Data
Data for Keeline 3 W standing records by year: CSV or JSON. Field meanings are on the data page.
Data for Keeline 3 W 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.