| Daily Summary |
| | Actual | Average (KSEA) | Record (KSEA) |
| Temperature |
| Mean Temperature |
°F
|
44°F
|
|
| Max Temperature |
54°F
|
50°F
|
64°F
(1987) |
| Min Temperature |
46°F
|
39°F
|
25°F
(1985) |
| Degree Days |
| Heating Degree Days |
15 |
21 |
|
| Month to date heating degree days |
|
369 |
|
| Since 1 July heating degree days |
|
966 |
|
| Cooling Degree Days |
0 |
0 |
|
| Month to date cooling degree days |
|
0 |
|
| Year to date cooling degree days |
|
189 |
|
| Moisture |
| Dew Point |
43°F
| | |
| Average Humidity |
80 |
|
|
| Maximum Humidity |
90 |
|
|
| Minimum Humidity |
66 |
|
|
| Precipitation |
| Precipitation |
0.20 in
|
0.23 in
|
3.41 in
(1959) |
| Month to date precipitation |
|
4.35 |
|
| Year to date precipitation |
|
29.92 |
|
| Snow |
| Snow |
0.00 in
|
in
|
5.20 in
(1960) |
| Month to date snowfall |
|
|
|
| Since 1 July snowfall |
|
|
|
| Snow Depth |
in
|
| |
| Wind |
| Wind Speed |
3 mph
| | |
| Max Wind Speed |
10 mph
| | |
| Max Gust Speed |
22 mph
| | |
| Visibility |
9 miles
| | |
| Events |
Rain
| | |
|
| Key: T is trace of precipitation, MM is missing value |
|
Source: NWS Daily Summary |
