| Daily Summary |
| | Actual | Average (KSEA) | Record (KSEA) |
| Temperature |
| Mean Temperature |
°F
|
45°F
|
|
| Max Temperature |
59°F
|
50°F
|
60°F
(1965) |
| Min Temperature |
50°F
|
39°F
|
25°F
(1977) |
| Degree Days |
| Heating Degree Days |
10 |
20 |
|
| Month to date heating degree days |
|
348 |
|
| Since 1 July heating degree days |
|
945 |
|
| Cooling Degree Days |
0 |
0 |
|
| Month to date cooling degree days |
|
0 |
|
| Year to date cooling degree days |
|
189 |
|
| Growing Degree Days | 4 (Base
°F
) | | |
| Moisture |
| Dew Point |
48°F
| | |
| Average Humidity |
80 |
|
|
| Maximum Humidity |
89 |
|
|
| Minimum Humidity |
67 |
|
|
| Precipitation |
| Precipitation |
1.83 in
|
0.24 in
|
2.13 in
(2012) |
| Month to date precipitation |
|
4.12 |
|
| Year to date precipitation |
|
29.69 |
|
| Snow |
| Snow |
0.00 in
|
in
|
7.00 in
(1996) |
| Month to date snowfall |
|
|
|
| Since 1 July snowfall |
|
|
|
| Snow Depth |
in
|
| |
| Wind |
| Wind Speed |
7 mph
| | |
| Max Wind Speed |
16 mph
| | |
| Max Gust Speed |
30 mph
| | |
| Visibility |
7 miles
| | |
| Events |
Rain
, Thunderstorm
| | |
|
| Key: T is trace of precipitation, MM is missing value |
|
Source: NWS Daily Summary |
