| Daily Summary |
| | Actual | Average (KSEA) | Record (KSEA) |
| Temperature |
| Mean Temperature |
°F
|
46°F
|
|
| Max Temperature |
54°F
|
52°F
|
60°F
(1953) |
| Min Temperature |
44°F
|
41°F
|
13°F
(1955) |
| Degree Days |
| Heating Degree Days |
16 |
19 |
|
| Month to date heating degree days |
|
211 |
|
| Since 1 July heating degree days |
|
808 |
|
| Cooling Degree Days |
0 |
0 |
|
| Month to date cooling degree days |
|
0 |
|
| Year to date cooling degree days |
|
189 |
|
| Moisture |
| Dew Point |
45°F
| | |
| Average Humidity |
88 |
|
|
| Maximum Humidity |
93 |
|
|
| Minimum Humidity |
74 |
|
|
| Precipitation |
| Precipitation |
0.13 in
|
0.23 in
|
1.52 in
(1999) |
| Month to date precipitation |
|
2.50 |
|
| Year to date precipitation |
|
28.07 |
|
| Snow |
| Snow |
0.00 in
|
in
|
T in
(1955) |
| Month to date snowfall |
|
|
|
| Since 1 July snowfall |
|
|
|
| Snow Depth |
in
|
| |
| Wind |
| Wind Speed |
5 mph
| | |
| Max Wind Speed |
12 mph
| | |
| Max Gust Speed |
mph
| | |
| Visibility |
9 miles
| | |
| Events |
Rain
| | |
|
| Key: T is trace of precipitation, MM is missing value |
|
Source: NWS Daily Summary |
