| Daily Summary |
| | Actual | Average (KSEA) | Record (KSEA) |
| Temperature |
| Mean Temperature |
°F
|
40°F
|
|
| Max Temperature |
41°F
|
45°F
|
54°F
(1949) |
| Min Temperature |
33°F
|
36°F
|
8°F
(1968) |
| Degree Days |
| Heating Degree Days |
28 |
24 |
|
| Month to date heating degree days |
|
709 |
|
| Since 1 July heating degree days |
|
1892 |
|
| Cooling Degree Days |
0 |
0 |
|
| Month to date cooling degree days |
|
0 |
|
| Year to date cooling degree days |
|
189 |
|
| Moisture |
| Dew Point |
37°F
| | |
| Average Humidity |
97 |
|
|
| Maximum Humidity |
100 |
|
|
| Minimum Humidity |
81 |
|
|
| Precipitation |
| Precipitation |
0.09 in
|
0.16 in
|
1.92 in
(1996) |
| Month to date precipitation |
|
5.03 |
|
| Year to date precipitation |
|
37.17 |
|
| Snow |
| Snow |
0.00 in
|
in
|
2.10 in
(1971) |
| Month to date snowfall |
|
|
|
| Since 1 July snowfall |
|
|
|
| Snow Depth |
in
|
| |
| Wind |
| Wind Speed |
2 mph
| | |
| Max Wind Speed |
5 mph
| | |
| Max Gust Speed |
mph
| | |
| Visibility |
7 miles
| | |
| Events |
Fog
, Rain
| | |
|
| Key: T is trace of precipitation, MM is missing value |
|
Source: NWS Daily Summary |
