| Daily Summary |
| | Actual | Average (KSEA) | Record (KSEA) |
| Temperature |
| Mean Temperature |
°F
|
43°F
|
|
| Max Temperature |
53°F
|
48°F
|
58°F
(1986) |
| Min Temperature |
39°F
|
37°F
|
7°F
(1950) |
| Degree Days |
| Heating Degree Days |
18 |
22 |
|
| Month to date heating degree days |
|
578 |
|
| Since 1 July heating degree days |
|
2516 |
|
| Cooling Degree Days |
0 |
0 |
|
| Month to date cooling degree days |
|
0 |
|
| Year to date cooling degree days |
|
0 |
|
| Moisture |
| Dew Point |
41°F
| | |
| Average Humidity |
81 |
|
|
| Maximum Humidity |
93 |
|
|
| Minimum Humidity |
62 |
|
|
| Precipitation |
| Precipitation |
0.09 in
|
0.17 in
|
0.93 in
(1993) |
| Month to date precipitation |
|
4.62 |
|
| Year to date precipitation |
|
4.62 |
|
| Snow |
| Snow |
0.00 in
|
in
|
7.90 in
(1972) |
| Month to date snowfall |
|
|
|
| Since 1 July snowfall |
|
|
|
| Snow Depth |
in
|
| |
| Wind |
| Wind Speed |
5 mph
| | |
| Max Wind Speed |
8 mph
| | |
| Max Gust Speed |
mph
| | |
| Visibility |
8 miles
| | |
| Events |
Rain
| | |
|
| Key: T is trace of precipitation, MM is missing value |
|
Source: NWS Daily Summary |
