| Daily Summary |
| | Actual | Average (KSEA) | Record (KSEA) |
| Temperature |
| Mean Temperature |
°F
|
44°F
|
|
| Max Temperature |
51°F
|
51°F
|
64°F
(1992) |
| Min Temperature |
39°F
|
37°F
|
20°F
(2011) |
| Degree Days |
| Heating Degree Days |
20 |
21 |
|
| Month to date heating degree days |
|
543 |
|
| Since 1 July heating degree days |
|
3192 |
|
| Cooling Degree Days |
0 |
0 |
|
| Month to date cooling degree days |
|
0 |
|
| Year to date cooling degree days |
|
0 |
|
| Moisture |
| Dew Point |
35°F
| | |
| Average Humidity |
72 |
|
|
| Maximum Humidity |
87 |
|
|
| Minimum Humidity |
41 |
|
|
| Precipitation |
| Precipitation |
0.06 in
|
0.13 in
|
0.98 in
(1948) |
| Month to date precipitation |
|
3.13 |
|
| Year to date precipitation |
|
8.70 |
|
| Snow |
| Snow |
0.00 in
|
in
|
T in
(2009) |
| Month to date snowfall |
|
|
|
| Since 1 July snowfall |
|
|
|
| Snow Depth |
in
|
| |
| Wind |
| Wind Speed |
11 mph
| | |
| Max Wind Speed |
18 mph
| | |
| Max Gust Speed |
30 mph
| | |
| Visibility |
10 miles
| | |
| Events |
Rain
| | |
|
| Key: T is trace of precipitation, MM is missing value |
|
Source: NWS Daily Summary |
