MISSOULA, MONTANA
NORMALS, MEANS, AND EXTREMES

LONGITUDE: 46 Deg. 55 Min. N LONGITUDE: 114 Deg. 05 Min. W ELEVATION: FT. GRND 3197 BARO 3203 TIME ZONE: MOUNTAIN WBAN: 24153

(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






51

51



30.0
15.4
22.7

59
1953
-33
1957


37.4
20.9
29.2

66
1995
-27
1982


46.6
24.9
35.8

75
1978
-13
1955


57.5
30.9
44.2

87
1987
14
1951


65.7
37.9
51.8

95
1986
21
1985


73.9
46.1
60.0

98
1987
31
1991


83.4
50.1
66.8

105
1973
31
1971


82.2
49.2
65.8

105
1961
30
1992


70.9
40.4
55.7

99
1967
20
1985


57.0
31.3
44.2

85
1980
0
1971


40.6
24.2
32.4

66
1983
-23
1955


30.2
16.4
23.4

60
1956
-30
1983


56.3
32.3
44.3

105
JUL 1973
-33
JAN 1957
NORMAL DEGREE DAYS
Heating (base 65 Deg. F)
Cooling (base 65 Deg. F)




1311
0

100
0

90
0

62
0

409
0

179
29

61
121

81
106

303
24

64
0

97
0

1290
0

7792
280
% OF POSSIBLE SUNSHINE
50
33
44
54
57
59
63
80
77
69
55
33
29
54
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

51


51
51
51

51

51
51

51


35
35

35
35

8.4


2.5
4.2
24.4

13.4

4.1
0.*

4.6


0.0
15.9

29.4
4.9

8.1


2.8
4.5
20.9

10.3

2.1
0.*

4.0


0.0
7.1

26.2
1.8

7.8


3.4
6.1
21.6

11.5

1.9
0.1

1.4


0.0
2.0

25.9
0.3

7.5


3.7
6.8
19.5

10.2

0.6
0.7

0.3


0.0
0.0

16.9
0.0

7.0


5.4
8.5
17.1

11.7

0.2
3.5

0.2


0.3
0.0

5.2
0.0

6.4


6.4
9.3
14.3

11.5

0.0
5.5

0.3


2.7
0.0

0.2
0.0

3.9


15.3
10.0
5.7

7.3

0.0
6.4

0.2


8.9
0.0

0.*
0.0

4.5


13.5
9.5
7.9

7.3

0.0
5.8

0.4


9.2
0.0

0.1
0.0

5.4


10.3
8.2
11.5

7.5

0.0
1.9

1.0


0.9
0.0

3.9
0.0

6.7


6.7
7.3
16.9

8.0

0.3
0.3

3.1


0.0
0.2

17.6
0.*

8.3


2.4
4.6
23.0

11.5

2.2
0.*

4.6


0.0
5.6

25.8
0.6

8.6


2.0
4.2
24.8

12.7

3.8
0.0

6.3


0.0
17.4

29.6
2.9

6.9


74.5
83.2
207.5

122.9

15.2
24.2

26.6


22.0
48.3

180.9
10.5
AV. STATION PRES. (mb)
23
906.7
905.6
902.9
903.7
903.3
903.9
905.3
905.1
906.3
906.9
905.9
906.8
905.2
RELATIVE HUMIDITY (%)
Hour 04
Hour 10 (Local Time)
Hour 16
Hour 22

35
35
35
35

85
81
76
83

85
78
66
80

83
66
51
75

80
54
41
67

82
53
42
68

94
53
42
68

78
44
32
58

75
45
31
57

82
55
39
68

85
67
50
76

87
79
71
84

86
83
80
85

83
63
52
72
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



51

51

51


51

51



1.24
2.94
1969
0.16
1981
0.88
1948

42.5
1963
11.3
1980


0.79
2.18
1.6
0.17
1973
1.03
1975

20.1
1975
14.4
1975


0.97
2.10
1989
0.20
1.53
0.80
1992

16.3
1989
6.9
1977


0.96
3.01
1994
0.08
1977
1.65
1951

8.2
1970
6.9
1950


1.78
7.38
1980
0.25
1963
1.92
1980

8.1
1978
8.1
1978


1.78
4.19
1958
0.35
1961
1.61
1964

T
1973
T
1973


0.91
3.05
1946
0.09
1985
1.80
1987

T
1994
T
1994


1.20
3.29
1985
T
1967
1.43
1947

T
1991
T
1991


1.12
3.60
1985
0.05
1979
1.34
1954

0.4
1983
0.4
1983


0.74
3.51
1975
0.01
1978
1.49
1946

5.4
1973
5.4
1973


0.81
2.51
1973
0.22
1976
0.81
1973

17.7
1947
6.2
1961


1.16
3.15
1964
0.25
1976
0.94
1964

31.6
1964
9.6
1955


13.46
7.38
MAY 1980
T
AUG 1967
1.92
MAY 1980

42.5
JAN 1963
14.4
FEB 1975
WIND
Mean Speed (mph)
Prevailing Direction
through 1964
Fastest Mile
-Direction(!!)
-Speed(mph)
-Year
Peak Gust
-Direction(!!)
-Speed(mph)
-Date

51



50
50


12
12


5.1

ESE

S
52
1953

SW
56
1989

5.7

NW

NW
47
1963

NW
45
1988

6.7

NW

SW
50
1972

W
55
1986

7.6

NW

NW
51
1950

SW
63
1987

7.4

NW

SW
57
1954

SW
56
1985

7.2

NW

S
51
1956

S
67
1995

6.9

NW

SE
72
1957

NW
59
1987

6.7

NW

SW
58
1956

SE
61
1993

6.0

NW

N
43
1974

NW
53
1991

5.1

NW

SW
51
1950

SW
61
1991

5.1

NW

SW
42
1978

W
47
1993

4.8

E

w
56
1957

NW
76
1995

6.2

NW

SE
72
JUL 1957

NW
76
DEC 1995
(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.