| Daily Summary |
| | Average (KSEA) | Record (KSEA) |
| Temperature |
| Mean Temperature |
47°F
|
|
| Max Temperature |
53°F
|
65°F
(1930) |
| Min Temperature |
41°F
|
31°F
(1952) |
| Degree Days |
| Heating Degree Days |
18 |
|
| Month to date heating degree days |
|
121 |
|
| Since 1 July heating degree days |
|
742 |
|
| Cooling Degree Days |
0 |
|
| Month to date cooling degree days |
|
0 |
|
| Year to date cooling degree days |
|
173 |
|
| Moisture |
| Dew Point |
| |
| Average Humidity |
|
|
| Maximum Humidity |
|
|
| Minimum Humidity |
|
|
| Precipitation |
| Precipitation |
0.18 in
|
1.93 in
(1995) |
| Month to date precipitation |
|
1.20 |
|
| Year to date precipitation |
|
26.75 |
|
| Snow |
| Snow |
in
|
in
() |
| Month to date snowfall |
|
|
|
| Since 1 July snowfall |
|
|
|
| Snow Depth |
| |
| Wind |
| Wind Speed |
| |
| Max Wind Speed |
| |
| Max Gust Speed |
| |
|
| Key: T is trace of precipitation, MM is missing value |
|
Source: NWS Daily Summary |
