| Daily Summary |
| | Average (KSEA) | Record (KSEA) |
| Temperature |
| Mean Temperature |
45°F
|
|
| Max Temperature |
51°F
|
61°F
(1965) |
| Min Temperature |
40°F
|
23°F
(1955) |
| Degree Days |
| Heating Degree Days |
20 |
|
| Month to date heating degree days |
|
308 |
|
| Since 1 July heating degree days |
|
905 |
|
| Cooling Degree Days |
0 |
|
| Month to date cooling degree days |
|
0 |
|
| Year to date cooling degree days |
|
189 |
|
| Moisture |
| Dew Point |
| |
| Average Humidity |
|
|
| Maximum Humidity |
|
|
| Minimum Humidity |
|
|
| Precipitation |
| Precipitation |
0.23 in
|
1.06 in
(1982) |
| Month to date precipitation |
|
3.65 |
|
| Year to date precipitation |
|
29.22 |
|
| Snow |
| Snow |
in
|
4.60 in
(1955) |
| 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 |
