| Daily Summary |
| | Actual | Average (KSEA) | Record (KSEA) |
| Temperature |
| Mean Temperature |
°F
|
41°F
|
|
| Max Temperature |
52°F
|
46°F
|
59°F
(2002) |
| Min Temperature |
41°F
|
37°F
|
19°F
(1973) |
| Degree Days |
| Heating Degree Days |
18 |
24 |
|
| Month to date heating degree days |
|
168 |
|
| Since 1 July heating degree days |
|
2106 |
|
| Cooling Degree Days |
0 |
0 |
|
| Month to date cooling degree days |
|
0 |
|
| Year to date cooling degree days |
|
0 |
|
| Moisture |
| Dew Point |
43°F
| | |
| Average Humidity |
79 |
|
|
| Maximum Humidity |
93 |
|
|
| Minimum Humidity |
71 |
|
|
| Precipitation |
| Precipitation |
0.02 in
|
0.19 in
|
2.29 in
(2009) |
| Month to date precipitation |
|
1.30 |
|
| Year to date precipitation |
|
1.30 |
|
| Snow |
| Snow |
0.00 in
|
in
|
2.70 in
(1980) |
| Month to date snowfall |
|
|
|
| Since 1 July snowfall |
|
|
|
| Snow Depth |
in
|
| |
| Wind |
| Wind Speed |
11 mph
| | |
| Max Wind Speed |
22 mph
| | |
| Max Gust Speed |
37 mph
| | |
| Visibility |
10 miles
| | |
| Events |
Rain
| | |
|
| Key: T is trace of precipitation, MM is missing value |
|
Source: NWS Daily Summary |
