OLYMPIA, WASHINGTON
NORMALS, MEANS, AND EXTREMES

LATITUDE: 46 Deg. 58 Min. N LONGITUDE: 122 Deg. 54 Min. W ELEVATION: FT. GRND 195 BARO 196 TIME ZONE: PACIFIC WBAN: 24227

(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






54

54



44.4
31.6
38.0

63
1942
-8
1979


49.5
32.7
41.1

73
1986
-1
1972


53.9
33.6
43.8

76
1995
9
1989


58.8
36.2
47.5

87
1987
23
1975


65.3
41.0
53.2

96
1983
25
1954


70.9
46.4
58.7

101
1942
30
1976


76.5
49.2
62.9

103
1941
35
1962


77.1
49.5
63.3

104
1981
33
1973


71.0
44.7
57.9

98
1988
25
1972


60.5
38.8
49.7

90
1987
20
1971


50.0
35.0
42.5

74
1949
- 1
1955


44.2
32.1
38.2

64
1958
-7
1983


60.2
39.2
49.7

104
AUG 1981
-8
JAN 1979
NORMAL DEGREE DAYS
Heating (base 65 Deg. F)
Cooling (base 65 Deg. F)




837
0

669
0

657
0

125
0

36
0

201
12

96
31

102
49

222
9

474
0

67
0

831
0

5655
101
% 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
90 Deg. F and above
32 Deg. F and below
-Minimum
32 Deg. F and below
0 Deg. F and below

51


54
54
54

54

54
52

52


36
36

36
36

8.7


2.1
3.5
25.3

19.4

2.2
0.1

9.6


0.0
1.1

15.8
0.1

8.4


2.2
4.3
21.8

17.2

1.0
0.2

8.3


0.0
0.1

13.6
0.*

8.0


2.6
6.5
21.9

17.7

0.6
0.3

7.9


0.0
0.0

13.8
0.0

7.8


2.7
7.3
19.9

14.9

0..
0.6

5.1


0.0
0.0

8.1
0.0

7.2


4.3
8.6
18.2

10.9

0.0
0.8

3.1


0.1
0.0

1.9
0.0

6.9


5.3
8.4
16.3

9.0

0.0
0.6

2.2


0.7
0.0

0.1
0.0

5.5


10.0
9.8
11.2

4.9

0.0
0.5

3.1


2.4
0.0

0.0
0.0

5.8


8.9
9.9
12.2

5.6

0.0
0.8

5.4


2.4
0.0

0.0
0.0

6.1


7.8
9.6
12.6

8.2

0.0
0.8

9.4


0.6
0.0

0.6
0.0

7.7


3.1
8.0
19.9

13.7

0.0
0.4

13.8


0.*
0.0

5.4
0.0

8.6


1.5
5.2
23.3

19.4

0.3
0.3

10.9


0.0
0.3

10.6
0.1

8.8


1.7
3.5
25.8

20.7

1.1
0.1

10.3


0.0
1.2

15.3
0.2

7.5


52.3
84.4
228.5

161.6

5.2
5.3

89.1


6.3
2.7

85.2
0.4
AV. STATION PRES. (mb)
23
1010.7
1009.4
1008.4
1010.1
1009.9
1010.1
1010.6
1009.5
1009.8
1010.8
1009.8
1010.9
1010.0
RELATIVE HUMIDITY (%)
Hour 04
Hour 10 (Local Time)
Hour 16
Hour 22

35
36
36
31

92
89
80
90

92
87
71
89

91
80
62
87

91
72
57
83

90
67
55
90

91
67
54
79

91
65
50
78

91
67
50
80

93
73
54
86

94
85
67
92

93
89
80
92

92
90
84
91

92
78
64
86
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



54

54

54


54

54



8.01
19.84
1953
0.29
1985
4.52
1990

58.7
1969
20.5
1972


5.77
13.18
1961
0.22
1993
4.93
1951

27.4
1990
11.8
1989


4.95
10.13
1950
0.48
1965
3.92
1972

20.6
1951
9.1
1966


3.29
7.80
1991
0.37
1956
3.46
1991

2.2
1972
1.8
1972


2.09
5.83
1948
0.15
1947
1.54
1948

T
1991
T
1991


1.63
6.48
1946
0.04
1945
1.91
1985

T
1994
T
1994


0.82
3.00
1983
T
1984
1.50
1979

0.0

0.0



1.29
5.45
1968
0.00
1946
1.39
1977

0.0

0.0



2.26
7.59
1978
T
1993
2.48
1978

T
1972
T
1972


4.31
10.08
1967
0.39
1987
3.60
1981

T
1975
T
1975


8.05
15.51
1962
1.37
1976
5.90
1990

14.8
1978
14.5
1978


8.12
14.32
1970
2.28
1944
3.83
1956

21.4
1968
11.9
1974


50.59
19.84
JAN 1953
0.00
AUG 1946
5.90
NOV 1990

58.7
JAN 1969
20.5
JAN 1972
WIND
Mean Speed (mph)
Prevailing Direction
through 1964
Fastest Mile
-Direction(!!)
-Speed(mph)
-Year
Peak Gust
-Direction(!!)
-Speed(mph)
-Date

42



47



12
12


7.1

SSW

18
55
1956

SW
58
1986

7.1

SSW

18
45
1958

S
43
1984

7.3

SSW

23
40
1956

S
51
1995

7.4

SW

23
46
1962

S
43
1991

6.9

SW

29
39
1960

W
38
1993

6.7

SSW

25
32
1949

S
38
1986

6.2

SW

18
29
1957

W
32
1987

6.0

SW

27
26
1964

SW
37
1995

5.7

SW

18
35
1967

SW
38
1990

5.8

SSW

23
58
1962

SW
45
1990

6.9

SW

18
60
1958

17
47
1995

7.2

SSW

16
45
1995

14
66
1995

6.7

SSW

18
60
NOV 1958

14
66
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.