GUAM, PACIFIC
NORMALS, MEANS, AND EXTREMES

LATITUDE: 13 Deg. 29 Min. N LONGITUDE: 144 Deg. 48 Min. E ELEVATION: FT. GRND 253 BARO 253 TIME ZONE: 150E MER. WBAN: 41415

(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






38

38



83.6
71.0
77.3

87
1994
56
1978


83.5
70.9
77.2

89
1989
59
1959


84.5
71.1
77.8

90
1989
54
1965


85.8
72.1
79.0

90
1994
59
1965


86.8
72.6
79.7

92
1993
62
1960


86.9
72.9
79.9

93
1993
63
1983


86.3
72.4
79.4

94
1983
64
1986


85.9
72.2
79.1

91
1995
63
1983


86.1
72.2
79.2

95
1957
61
1958


85.9
72.4
79.1

91
1995
64
1987


85.3
73.1
79.2

90
1995
62
1957


84.2
72.7
78.5

89
1995
61
1980


85.4
72.1
78.8

95
SEP 1957
54
MAR 1965
NORMAL DEGREE DAYS
Heating (base 65 Deg. F)
Cooling (base 65 Deg. F)




0
381

0
342

0
397

0
420

0
456

0
447

0
446

0
437

0
426

0
437

0
426

0
419

0
5034
% OF POSSIBLE SUNSHINE
33
47
51
57
57
54
50
39
34
36
36
39
37
45
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

17


17
17
17

39

39
12

12


38
38

38
38

6.9


3.4
12.5
15.1

20.6

0.0
0.6

0.0


0.0
0.0

0.0
0.0

7.4


2.5
9.3
16.5

18.1

0.0
0.0

0.0


0.0
0.0

0.0
0.0

6.9


3.1
13.6
14.2

18.8

0.0
0.0

0.0


0..
0.0

0.0
0.0

7.4


1.3
13.7
15.0

19.8

0.0
0.5

0.0


0.2
0.0

0.0
0.0

7.4


0.8
14.5
15.7

20.1

0.0
1.0

0.0


2.4
0.0

0.0
0.0

8.1


0.6
9.9
19.6

23.7

0.0
1.7

0.0


3.3
0.0

0.0
0.0

8.5


0.3
8.3
22.5

25.9

0.0
4.5

0.0


1.7
0.0

0.0
0.0

9.0


0.0
4.3
26.8

25.8

0.0
6.5

0.0


0.7
0.0

0.0
0.0

8.7


0.2
6.2
23.6

25.5

0.0
6.7

0.0


0.7
0.0

0.0
0.0

8.3


0.3
9.3
21.4

25.5

0.0
3.4

0.0


0.3
0.0

0.0
0.0

7.2


2.6
12.5
14.9

25.3

0.0
2.1

0.0


0.1
0.0

0.0
0.0

7.2


2.8
11.8
16.5

23.5

0.0
0.3

0.2


0.0
0.0

0.0
0.0

7.8


17.9
125.8
221.6

272.6

0.0
27.2

0.2


9.3
0.0

0.0
0.0
AV. STATION PRES. (mb)




1003.1
1002.4 1
002.7
1001.4
1001.0
1000.0
998.6
1000.0
1001.0

RELATIVE HUMIDITY (%)
Hour 04
Hour 10 (Local Time)
Hour 16
Hour 22

3
28
28
27

88
77
75
87

88
76
74
85

88
75
72
84

88
74
71
85

91
74
72
87

91
76
73
88

93
50
78
90

94
82
80
92

95
81
50
92

94
80
79
92

90
81
79
90

87
79
77
87

91
78
76
88
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



39

39

39




39



5.55
20.39
1976
1.17
1993
11.09
1990

0.0

0.0



5.11
14.79
1980
0.67
1960
9.24
1980

0.0

0.0



4.45
16.94
1971
0.59
1965
3.55
1972

0.0

0.0



4.71
19.55
1963
0.50
1965
6.37
1974

0.0

0.0



7.10
40.13
1976
0.64
1987
27.00
1976

0.0

0.0



6.49
14.61
1985
0.80
1983
4.55
1958

0.0

0.0



11.78
20.00
1972
4.74
1957
7.86
1986

0.0

0.0



14.59
38.13
1992
3.87
1965
15.36
1992

0.0

0.0



15.02
27.13
1982
5.95
1992
7.48
1965

0.0

0.0



12.74
26.05
1979
6.63
1976
12.07
1986

0.0

0.0



9.06
18.14
1957
2.08
1973
7.26
1957

0.0

0.0



6.44
16.19
1963
2.17
1992
6.09
1963

0.0

0.0



103.04
40.13
MAY 1976
0.50
APR 1965
27.00
MAY 1976





WIND
Mean Speed (mph)
Prevailing Direction
through 1964
Fastest Mile
-Direction(!!)
-Speed(mph)
-Year
Peak Gust
-Direction(!!)
-Speed(mph)
-Date

6



32
32


12
12


8.2

E

W
64
1988

W
87
1988

10.2

NE

NE
36
1962

NE
37
1989

9.0

E

NE
32
1977

E
37
1994

9.7

E

SW
64
1963

NE
58
1989

8.9

E

NE
76
1976

E
40
1995

7.1

E

E
32
1976

SE
49
1995

5.8

E

E
34
1963

SW
41
1986

5.4

E

SE
43
1979

NE
117
1992

5.3

E

E
35
1976

NE
43
1993

6.7

E

W
44
1968

E
61
1992

8.2

E

NE
80
1962

E
79
1991

9.5

E

NE
67
1990

NE
89
1990

7.8

E

NE
80
NOV 1962

NE
117
AUG 1992
(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.