| Daily Summary |
| | Actual | Average (KSEA) | Record (KSEA) |
| Temperature |
| Mean Temperature |
°F
|
41°F
|
|
| Max Temperature |
48°F
|
46°F
|
55°F
(1962) |
| Min Temperature |
41°F
|
36°F
|
18°F
(1972) |
| Degree Days |
| Heating Degree Days |
20 |
24 |
|
| Month to date heating degree days |
|
164 |
|
| Since 1 July heating degree days |
|
1347 |
|
| Cooling Degree Days |
0 |
0 |
|
| Month to date cooling degree days |
|
0 |
|
| Year to date cooling degree days |
|
189 |
|
| Moisture |
| Dew Point |
39°F
| | |
| Average Humidity |
79 |
|
|
| Maximum Humidity |
86 |
|
|
| Minimum Humidity |
69 |
|
|
| Precipitation |
| Precipitation |
0.12 in
|
0.19 in
|
0.88 in
(1968) |
| Month to date precipitation |
|
1.35 |
|
| Year to date precipitation |
|
33.49 |
|
| Snow |
| Snow |
0.00 in
|
in
|
2.00 in
(1966) |
| Month to date snowfall |
|
|
|
| Since 1 July snowfall |
|
|
|
| Snow Depth |
in
|
| |
| Wind |
| Wind Speed |
7 mph
| | |
| Max Wind Speed |
14 mph
| | |
| Max Gust Speed |
24 mph
| | |
| Visibility |
9 miles
| | |
| Events |
Rain
| | |
|
| Key: T is trace of precipitation, MM is missing value |
|
Source: NWS Daily Summary |
