| Daily Summary |
| | Actual | Average (KSEA) | Record (KSEA) |
| Temperature |
| Mean Temperature |
°F
|
41°F
|
|
| Max Temperature |
50°F
|
47°F
|
55°F
(1954) |
| Min Temperature |
44°F
|
36°F
|
23°F
(1956) |
| Degree Days |
| Heating Degree Days |
18 |
24 |
|
| Month to date heating degree days |
|
116 |
|
| Since 1 July heating degree days |
|
1299 |
|
| Cooling Degree Days |
0 |
0 |
|
| Month to date cooling degree days |
|
0 |
|
| Year to date cooling degree days |
|
189 |
|
| Moisture |
| Dew Point |
38°F
| | |
| Average Humidity |
71 |
|
|
| Maximum Humidity |
82 |
|
|
| Minimum Humidity |
59 |
|
|
| Precipitation |
| Precipitation |
0.03 in
|
0.19 in
|
1.67 in
(1970) |
| Month to date precipitation |
|
0.98 |
|
| Year to date precipitation |
|
33.12 |
|
| Snow |
| Snow |
0.00 in
|
in
|
2.60 in
(1956) |
| Month to date snowfall |
|
|
|
| Since 1 July snowfall |
|
|
|
| Snow Depth |
in
|
| |
| Wind |
| Wind Speed |
8 mph
| | |
| Max Wind Speed |
12 mph
| | |
| Max Gust Speed |
20 mph
| | |
| Visibility |
10 miles
| | |
| Events |
Rain
| | |
|
| Key: T is trace of precipitation, MM is missing value |
|
Source: NWS Daily Summary |
