| Daily Summary |
| | Actual | Average (KSEA) | Record (KSEA) |
| Temperature |
| Mean Temperature |
°F
|
44°F
|
|
| Max Temperature |
47°F
|
50°F
|
62°F
(1954) |
| Min Temperature |
35°F
|
39°F
|
21°F
(1977) |
| Degree Days |
| Heating Degree Days |
24 |
21 |
|
| Month to date heating degree days |
|
390 |
|
| Since 1 July heating degree days |
|
987 |
|
| Cooling Degree Days |
0 |
0 |
|
| Month to date cooling degree days |
|
0 |
|
| Year to date cooling degree days |
|
189 |
|
| Moisture |
| Dew Point |
40°F
| | |
| Average Humidity |
89 |
|
|
| Maximum Humidity |
99 |
|
|
| Minimum Humidity |
76 |
|
|
| Precipitation |
| Precipitation |
0.27 in
|
0.23 in
|
1.26 in
(1980) |
| Month to date precipitation |
|
4.58 |
|
| Year to date precipitation |
|
30.15 |
|
| Snow |
| Snow |
0.00 in
|
in
|
7.80 in
(1985) |
| Month to date snowfall |
|
|
|
| Since 1 July snowfall |
|
|
|
| Snow Depth |
in
|
| |
| Wind |
| Wind Speed |
11 mph
| | |
| Max Wind Speed |
25 mph
| | |
| Max Gust Speed |
43 mph
| | |
| Visibility |
10 miles
| | |
| Events |
Rain
| | |
|
| Key: T is trace of precipitation, MM is missing value |
|
Source: NWS Daily Summary |
