Climatological Report (Daily)
Issued by NWS
Issued by NWS
Versions:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
546
CDUS46 KSEW 170835
CLISEA
CLIMATE REPORT
NATIONAL WEATHER SERVICE SEATTLE
135 AM PDT SUN AUG 17 2025
...................................
...THE SEATTLE-TACOMA WA AIRPORT CLIMATE SUMMARY FOR AUGUST 16 2025...
CLIMATE NORMAL PERIOD 1991 TO 2020
CLIMATE RECORD PERIOD 1945 TO 2025
WEATHER ITEM OBSERVED TIME RECORD YEAR NORMAL DEPARTURE LAST
VALUE (LST) VALUE VALUE FROM YEAR
NORMAL
...................................................................
TEMPERATURE (F)
YESTERDAY
MAXIMUM 74 155 PM 98 1967 78 -4 75
2020
MINIMUM 59 252 AM 47 1946 57 2 59
AVERAGE 67 68 -1 67
PRECIPITATION (IN)
YESTERDAY T 0.41 1995 0.03 -0.03 0.00
MONTH TO DATE 1.14 0.41 0.73 0.00
SINCE OCT 1 28.91 37.17 -8.26 33.65
SINCE JAN 1 15.51 21.23 -5.72 16.50
SNOWFALL (IN)
YESTERDAY 0.0 MM MM 0.0
MONTH TO DATE 0.0 0.0
SINCE OCT 1 2.3 0.3
SINCE JUL 1 0.0 0.0
SNOW DEPTH 0
DEGREE DAYS
HEATING
YESTERDAY 0 1 -1 0
MONTH TO DATE 2 9 -7 2
SINCE JUN 1 117 158 -41 141
SINCE JUL 1 23 40 -17 9
COOLING
YESTERDAY 2 3 -1 2
MONTH TO DATE 57 61 -4 60
SINCE JUN 1 218 186 32 243
SINCE JAN 1 221 196 25 250
...................................................................
WIND (MPH)
RESULTANT WIND SPEED 11 RESULTANT WIND DIRECTION SW (210)
HIGHEST WIND SPEED 18 HIGHEST WIND DIRECTION SW (220)
HIGHEST GUST SPEED 26 HIGHEST GUST DIRECTION SW (210)
AVERAGE WIND SPEED 11.3
SKY COVER
AVERAGE SKY COVER 0.7
WEATHER CONDITIONS
THE FOLLOWING WEATHER WAS RECORDED YESTERDAY.
LIGHT RAIN
RELATIVE HUMIDITY (PERCENT)
HIGHEST 96 1200 AM
LOWEST 53 1200 PM
AVERAGE 75
..........................................................
THE SEATTLE-TACOMA WA AIRPORT CLIMATE NORMALS FOR TODAY
NORMAL RECORD YEAR
MAXIMUM TEMPERATURE (F) 78 96 1977
MINIMUM TEMPERATURE (F) 57 45 1951
SUNRISE AND SUNSET
AUGUST 17 2025........SUNRISE 609 AM PDT SUNSET 817 PM PDT
AUGUST 18 2025........SUNRISE 610 AM PDT SUNSET 815 PM PDT
- INDICATES NEGATIVE NUMBERS.
R INDICATES RECORD WAS SET OR TIED.
MM INDICATES DATA IS MISSING.
T INDICATES TRACE AMOUNT.
$$