CHEYENNE, WYOMING
NORMALS, MEANS, AND EXTREMES

LATITUDE: 41 09' N LONGITUDE: 104 48' W ELEVATION: FT. GRND 6115 BARO 6128 TIME ZONE: MOUNTAIN WBAN: 24018

(a)
JAN
FEB
MAR
APR
MAY
JUN
JUL
AUG
SEP
OCT
NOV
DEC
YEAR
TEMPERATURE (Deg. F)
Normals
-Daily Maximum
-Daily Minimum
-Monthly
Extremes
-Record Highest
-Year
-Record Lowest
-Year






60

60



37.7
15.2
26.5

66
1982
-29
1984


40.5
18.1
29.3

71
1962
-34
1936


44.9
22.1
33.6

74
1986
-21
1943


54.7
30.1
42.5

83
1992
-8
1975


64.6
39.4
52.0

90
1969
16
1947


74.4
48.3
61.3

100
1954
25
1951


82.2
54.6
68.4

100
1939
38
1952


80.0
52.8
66.4

96
1979
36
1975


71.1
43.7
57.4

95
1995
8
1985


60.0
33.9
47.0

83
1992
-1
1991


46.8
23.7
35.2

73
1954
-16
1993


38.8
16.7
27.8

69
1939
-28
1990


58.0
33.2
45.6

100
JUN 1954
-34
FEB 1936
NORMAL DEGREE DAYS
Heating (base 65 Deg. F)
Cooling (base 65 Deg. F)




1194
0

1000
0

973
0

675
0

403
0

150
39

31
136

44
87

251
23

558
0

894
0

1153
0

7326
285
% OF POSSIBLE SUNSHINE
56
64
67
67
63
61
66
69
68
70
69
61
60
65
MEAN SKY COVER(tenths)
Sunrise - Sunset
MEAN NUMBER OF DAYS:
Sunrise to Sunset
-Clear
-Partly Cloudy
-Cloudy
Precipitation
.01 inches or more
Snow, Ice Pellets, Hail
1.0 inches or more
Thunderstorms
Heavy Fog Visibility
1/4 mile or less
Temperature Deg. F
-Maximum
90 Deg. F and above
32 Deg. F and below
-Minimum
32 Deg. F and below
0 Deg. F and below

60


60
60
60

60

60
60

60


36
36

36
36

5.8


9.0
9.5
12.8

5.7

2.1
0.0

0.9


0.0
9.3

28.9
4.2

6.2


7.2
8.9
12.1

6.4

2.1
0.1

1.8


0.0
7.0

26.4
2.5

6.3


7.0
9.9
14.0

9.4

3.6
0.2

3.0


0.0
5.1

27.1
0.9

6.5


5.7
10.3
14.0

9.8

2.4
2.2

3.1


0.0
1.4

17.9
0.1

6.7


4.7
11.9
14.4

12.1

0.8
7.8

2.9


0.*
0.*

3.5
0.0

5.5


8.5
12.2
9.3

11.0

0.1
11.3

1.9


1.2
0.0

0.0
0.0

5.0


9.6
14.9
6.5

10.9

0.*
13.3

1.2


5.3
0.0

0.0
0.0

5.1


9.6
13.3
8.0

10.0

0.0
10.7

1.4


2.6
0.0

0.0
0.0

4.7


12.9
8.6
8.5

7.5

0.3
4.6

1.9


0.3
0.2

2.1
0.0

4.8


12.8
8.9
9.4

5.9

13
0.9

2.0


0.0
0.7

12.2
0.1

5.6


9.5
9.2
113

6.3

2.5
0.*

1.9


0.0
4.4

24.6
0.6

5.7


9.5
9.1
12.6

5.6

2.0
0.0

1.3


0.0
8.6

28.7
3.0

5.7


106.0
126.7
132.9

100.7

17.1
51.1

23.5


9.3
36.6

171.4
11.4
AV. STATION PRES. (mb)
23
809.0
809.2
807.5
809.0
810.3
812.8
815.3
815.5
814.6
813.1
810.0
809.4
811.3
RELATIVE HUMIDITY (%)
Hour 04
Hour 10 (Local Time)
Hour 16
Hour 22

36
36
36
36

58
46
50
58

62
46
48
62

66
46
47
64

68
43
42
65

72
43
44
68

72
40
41
65

70
36
38
63

69
36
38
63

66
37
38
62

61
38
41
59

61
44
51
60

59
46
53
59

65
42
44
62
PRECIPITATION (in.)
Water Equivalent
-Normal
-Maximum Monthly
-Year
-Minimum Monthly
-Year
-Maximum in 24 hrs
-Year
Snow, Ice Pellets, Hail
-Maximum Monthly
-Year
-Maximum in 24 hrs
-Year



60

60

60


60

60



0.40
2.78
1949
T
1952
1.41
1949

35.5
1980
12.7
1992


0.39
2.16
1953
T
1983
1.60
1953

23.3
1995
14.0
1953


1.03
3.65
1990
0.12
1966
1.88
1946

39.2
1990
15.6
1973


1.37
5.04
1942
0.34
1992
1.94
1984

31.8
1984
17.4
1984


2.39
6.00
1995
0.11
1974
2.07
1991

30.4
1943
15.0
1942


2.08
5.32
1955
0.07
1980
2.68
1955

8.7
1947
8.7
1947


2.09
5.01
1973
0.58
1969
3.42
1973

1.0
1994
1.0
1994


1.69
6.64
1985
0.03
1944
6.06
1985

0.5
1993
0.5
1993


1.27
4.52
1973
0.01
1992
2.75
1973

7.4
1985
5.8
1985


0.74
3.57
1942
0.03
1964
1.70
1947

21.3
1969
8.6
1990


0.53
2.48
1979
T
1965
1.66
1979

31.1
1979
19.8
1979


0.42
1.68
1937
0.03
1959
1.19
1979

21.3
1958
11.7
1979


14.40
6.64
AUG 1985
T
FEB 1983
6.06
AUG 1985

39.2
MAR 1990
19.8
NOV 1979
WIND
Mean Speed (mph)
Prevailing Direction
through 1964
Fastest Mile
-Direction(!!)
-Speed(mph)
-Year
Peak Gust
-Direction(!!)
-Speed(mph)
-Date

38



14
49


12
12


15.3

WNW

28
48
1989

W
77
1990

14.6

W

27
52
1988

27
70
1986

14.5

WNW

28
58
1994

W
75
1994

14.2

WNW

30
48
1982

W
64
1994

12.6

WNW

26
71
1988

W
71
1986

11.4

WNW

29
46
1994

W
94
1994

10.4

WNW

25
46
1994

W
79
1993

10.4

W

20
46
1994

S
61
1994

11.2

W

30
46
1992

NW
62
1992

12.3

W

29
51
1990

SW
71
1985

13.6

WNW

27
54
1995

W
76
1994

14.6

WNW

26
71
1995

26
74
1995

12.9

WNW

29

JUN 1994

W
84
JUN 1994
(a) - Length of Record in Years, although individual months may be missing.
0.* or * - The value is between 0.0 and 0.05.
Normals - Based on the 1961 - 1990 record period.
Extremes - Dates are the most recent occurrence.
Wind Dir.- Numerals show tens of degrees clockwise from true north. "00" indicates calm.
Resultant Directions are given to whole degrees.