| Daily Summary |
| | Actual | Average (KSEA) | Record (KSEA) |
| Temperature |
| Mean Temperature |
°F
|
48°F
|
|
| Max Temperature |
60°F
|
54°F
|
74°F
(2010) |
| Min Temperature |
50°F
|
43°F
|
29°F
(1953) |
| Degree Days |
| Heating Degree Days |
10 |
17 |
|
| Month to date heating degree days |
|
50 |
|
| Since 1 July heating degree days |
|
647 |
|
| Cooling Degree Days |
0 |
0 |
|
| Month to date cooling degree days |
|
0 |
|
| Year to date cooling degree days |
|
189 |
|
| Growing Degree Days | 5 (Base
°F
) | | |
| Moisture |
| Dew Point |
54°F
| | |
| Average Humidity |
96 |
|
|
| Maximum Humidity |
100 |
|
|
| Minimum Humidity |
77 |
|
|
| Precipitation |
| Precipitation |
0.11 in
|
0.20 in
|
1.37 in
(1971) |
| Month to date precipitation |
|
0.58 |
|
| Year to date precipitation |
|
26.15 |
|
| Snow |
| Snow |
0.00 in
|
in
|
0.20 in
(1973) |
| Month to date snowfall |
|
|
|
| Since 1 July snowfall |
|
|
|
| Snow Depth |
in
|
| |
| Wind |
| Wind Speed |
1 mph
| | |
| Max Wind Speed |
9 mph
| | |
| Max Gust Speed |
mph
| | |
| Visibility |
8 miles
| | |
| Events |
Rain
| | |
|
| Key: T is trace of precipitation, MM is missing value |
|
Source: NWS Daily Summary |
