BIG DELTA, ALASKA
NORMALS, MEANS, AND EXTREMES

LATITUDE: 64 Deg. 00 Min. N LONGITUDE: 145 Deg. 44 Min. W ELEVATION: FT. GRND 1268 BARO 1274 TIME ZONE: ALASKA WBAN: 26415

(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



3.1
-11.0
-4.0

48
1991
-63
1947


10.5
-6.2
2.2

51
1943
-60
1947


24.5
2.5
13.5

58
1981
-49
1964


40.3
20.5
30.4

72
1979
-37
1944


56.6
36.9
46.8

90
1947
-1
1945


66.4
47.2
56.8

92
1969
30
1974


69.6
50.7
60.2

91
1958
32
1971


64.7
46.0
55.4

90
1994
22
1948


53.2
35.7
44.4

79
1963
-2
1983


31.2
17.8
24.5

66
1969
-39
1975


12.7
-1.7
5.5

52
1979
-47
1986


5.4
-8.5
-1.6

55
1985
-62
1946


36.5
19.2
27.8

92
JUN 1969
-63
JAN 1947
NORMAL DEGREE DAYS
Heating (base 65 Deg. F)
Cooling (base 65 Deg. F)




2139
0

1758
0

1597
0

1038
0

564
0

250
0

158
9

307
9

618
0

1256
0

1785
0

2065
0

13535
18
% OF POSSIBLE SUNSHINE














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
70 Deg. F and above
32 Deg. F and below
-Minimum
32 Deg. F and below
0 Deg. F and below

3


3
3
3

35

24
9

9


51
51

50
50

4.4


14.3
8.0
8.7

5.6

2.1
0.0

2.3


0.0
29.1

31.0
20.9

7.0


4.7
6.7
16.7

4.4

1.7
0.0

0.4


0.0
24.8

28.0
17.5

6.1


8.3
8.0
14.7

4.4

1.7
0.0

0.1


0.0
21.4

30.2
14.3

7.9


1.7
8.7
19.7

3.7

1.0
0.0

0.1


0.*
7.2

26.2
2.9

7.4


1.7
11.0
18.3

6.6

0.3
0.4

0.3


2.1
0.3

7.9
0.1

7.2


3.7
9.3
17.0

11.9

0.0
2.4

0.0


10.5
0.0

0.1
0.0

8.1


0.3
8.3
22.3

13.5

0.0
1.6

0.3


15.3
0.0

0.*
0.0

7.8


2.3
8.0
20.7

12.2

0.0
0.3

0.9


8.3
0.0

0.9
0.0

7.2


5.3
6.7
18.0

8.5

0.6
0.0

1.9


0.6
0.6

9.9
0.*

7.9


3.7
4.7
22.7

8.7

4.1
0.0

1.0


0.0
16.3

27.6
3.5

6.8


7.0
6.3
16.7

7.5

4.1
0.0

0.6


0.0
26.6

29.7
14.7

6.6


7.3
7.0
16.7

5.9

2.2
0.0

0.8


0.0
29.2

30.9
20.6

7.0


60.3
92.7
212.0

92.9

17.8
4.7

8.6


36.7
155.4

222.4
94.5
AV. STATION PRES. (mb)














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

16
36
36
35

66
66
65
66

70
68
62
67

68
66
54
63

70
58
45
59

68
51
39
51

73
60
46
56

77
66
51
64

79
71
53
69

79
73
55
71

77
77
69
77

70
72
70
72

70
70
69
70

72
67
57
65
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



50

50

47


50

47



0.33
1.35
1957
T
1961
0.73
1957

20.9
1950
8.5
1957


0.28
1.44
1995
T
1.75
0.44
1957

15.9
1967
5.5
1957


0.2
1.14
1995
T
1987
0.53
1995

24.9
1967
6.4
1950


0.29
1.98
1948
T
1995
0.94
1963

19.0
1948
10.0
1982


0.92
3.07
1988
0.02
1944
1.16
1962

10.9
1989
9.3
1989


2.56
5.42
1985
0.51
1944
2.14
1943

T
1974
T
1963


2.72
6.18
1945
0.56
1994
2.06
1975

0.0

0.0



1.92
3.93
1995
0.55
1994
1.34
1995

T
1995
T
1995


1.06
3.01
1952
0.14
1984
1.17
1952

14.0
1981
8.0
1981


0.71
2.07
1989
T
1969
0.54
1952

20.1
1994
10.4
1981


0.52
2.82
1994
0.03
1953
0.44
1994

41.8
1994
9.5
1994


0.40
2.57
1955
T
1973
0.90
1955

29.0
1955
10.0
1965


11.96
6.18
JUL 1945
T
APR 1995
2.14
JUN 1943

41.8
NOV 1994
10.4
OCT 1981
WIND
Mean Speed (mph)
Prevailing Direction
through 1964
Fastest Mile
-Direction(!!)
-Speed(mph)
-Year
Peak Gust
-Direction(!!)
-Speed(mph)
-Date

20



23







10.8

ESE

29
74






9.9

ESE

18
60






8.2

ESE

20
63






7.6

W

18
60






7.9

SW

20
55






6.5

SW

16
51






6.0

SW

18
63






6.6

S

16
47






7.3

ESE

18
66






8.5

ESE

18
58






9.5

ESE

11
56






9.5

ESE

11
63






8.2

ESE

29
74





(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.