| Daily Summary |
| | Actual | Average (KSEA) | Record (KSEA) |
| Temperature |
| Mean Temperature |
°F
|
63°F
|
|
| Max Temperature |
71°F
|
73°F
|
88°F
(1986) |
| Min Temperature |
57°F
|
54°F
|
45°F
(1948) |
| Degree Days |
| Heating Degree Days |
1 |
3 |
|
| Month to date heating degree days |
|
16 |
|
| Since 1 July heating degree days |
|
116 |
|
| Cooling Degree Days |
0 |
1 |
|
| Month to date cooling degree days |
|
6 |
|
| Year to date cooling degree days |
|
160 |
|
| Growing Degree Days | 14 (Base
°F
) | | |
| Moisture |
| Dew Point |
54°F
| | |
| Average Humidity |
73 |
|
|
| Maximum Humidity |
89 |
|
|
| Minimum Humidity |
53 |
|
|
| Precipitation |
| Precipitation |
0.00 in
|
0.05 in
|
0.46 in
(1947) |
| Month to date precipitation |
|
0.26 |
|
| Year to date precipitation |
|
20.99 |
|
| Wind |
| Wind Speed |
4 mph
| | |
| Max Wind Speed |
10 mph
| | |
| Max Gust Speed |
17 mph
| | |
| Visibility |
10 miles
| | |
| Events |
| | |
|
| Key: T is trace of precipitation, MM is missing value |
|
Source: NWS Daily Summary |
