| Daily Summary |
| | Actual | Average (KSEA) | Record (KSEA) |
| Temperature |
| Mean Temperature |
°F
|
48°F
|
|
| Max Temperature |
60°F
|
53°F
|
65°F
(1949) |
| Min Temperature |
42°F
|
42°F
|
31°F
(1961) |
| Degree Days |
| Heating Degree Days |
14 |
17 |
|
| Month to date heating degree days |
|
84 |
|
| Since 1 July heating degree days |
|
681 |
|
| Cooling Degree Days |
0 |
0 |
|
| Month to date cooling degree days |
|
0 |
|
| Year to date cooling degree days |
|
189 |
|
| Growing Degree Days | 1 (Base
°F
) | | |
| Moisture |
| Dew Point |
51°F
| | |
| Average Humidity |
92 |
|
|
| Maximum Humidity |
100 |
|
|
| Minimum Humidity |
48 |
|
|
| Precipitation |
| Precipitation |
0.05 in
|
0.20 in
|
1.01 in
(1988) |
| Month to date precipitation |
|
0.98 |
|
| Year to date precipitation |
|
26.55 |
|
| Snow |
| Snow |
0.00 in
|
in
|
T in
(1973) |
| Month to date snowfall |
|
|
|
| Since 1 July snowfall |
|
|
|
| Snow Depth |
in
|
| |
| Wind |
| Wind Speed |
7 mph
| | |
| Max Wind Speed |
12 mph
| | |
| Max Gust Speed |
17 mph
| | |
| Visibility |
8 miles
| | |
| Events |
Fog
, Rain
| | |
|
| Key: T is trace of precipitation, MM is missing value |
|
Source: NWS Daily Summary |
