| Daily Summary |
| | Actual | Average (KSEA) | Record (KSEA) |
| Temperature |
| Mean Temperature |
°F
|
47°F
|
|
| Max Temperature |
62°F
|
53°F
|
65°F
(1960) |
| Min Temperature |
46°F
|
42°F
|
29°F
(1935) |
| Degree Days |
| Heating Degree Days |
11 |
17 |
|
| Month to date heating degree days |
|
85 |
|
| Since 1 July heating degree days |
|
706 |
|
| Cooling Degree Days |
0 |
0 |
|
| Month to date cooling degree days |
|
0 |
|
| Year to date cooling degree days |
|
173 |
|
| Growing Degree Days | 4 (Base
°F
) | | |
| Moisture |
| Dew Point |
46°F
| | |
| Average Humidity |
75 |
|
|
| Maximum Humidity |
90 |
|
|
| Minimum Humidity |
53 |
|
|
| Precipitation |
| Precipitation |
0.37 in
|
0.18 in
|
1.44 in
(1932) |
| Month to date precipitation |
|
0.84 |
|
| Year to date precipitation |
|
26.39 |
|
| Snow |
| Snow |
0.00 in
|
in
|
T in
(1973) |
| Month to date snowfall |
|
|
|
| Since 1 July snowfall |
|
|
|
| Snow Depth |
in
|
| |
| Wind |
| Wind Speed |
5 mph
| | |
| Max Wind Speed |
17 mph
| | |
| Max Gust Speed |
29 mph
| | |
| Visibility |
8 miles
| | |
| Events |
Rain
| | |
|
| Key: T is trace of precipitation, MM is missing value |
|
Source: NWS Daily Summary |
