| 05:38 PST |  Mostly Cloudy | 1°C / 34°F | 0°C / 32°F | 93% | 1015 mb (29.97 in) | Calm | - | 8SM |
| | KPAE 221338Z AUTO 00000KT 8SM BKN010 01/00 A2997 RMK AO2 CIG 009V013 |
| 04:53 PST |  Mostly Cloudy | 2°C / 36°F | 1°C / 34°F | 93% | 1014 mb (29.94 in) | S 6 kph (S 3.5 mph) | - | 10SM |
| | KPAE 221253Z AUTO 17003KT 10SM BKN120 02/01 A2995 RMK AO2 SLP146 T00170006 |
| 03:53 PST |  Overcast | 2°C / 36°F | 1°C / 34°F | 93% | 1014 mb (29.94 in) | SSE 11 kph (SSE 6.9 mph) | - | 10SM |
| | KPAE 221153Z AUTO 16006KT 10SM FEW006 OVC046 02/01 A2993 RMK AO2 SLP138 60002 70057 T00220011 10028 20022 51019 |
| 03:42 PST |  Overcast | 2°C / 36°F | 1°C / 34°F | 93% | 1013 mb (29.91 in) | SE 7 kph (SE 4.6 mph) | - | 10SM |
| | KPAE 221142Z AUTO 13004KT 10SM FEW006 SCT026 OVC046 02/01 A2992 RMK AO2 |
| 03:09 PST |  Overcast | 2°C / 36°F | 1°C / 34°F | 93% | 1013 mb (29.91 in) | SE 6 kph (SE 3.5 mph) | - | 10SM |
| | KPAE 221109Z AUTO 12003KT 10SM SCT006 OVC019 02/01 A2991 RMK AO2 |
| 02:53 PST |  Overcast | 2°C / 36°F | 1°C / 34°F | 93% | 1013 mb (29.91 in) | E 6 kph (E 3.5 mph) | 0.25 mm (0.01 in) | 10SM |
| | KPAE 221053Z AUTO 10003KT 10SM BKN006 BKN027 OVC042 02/01 A2991 RMK AO2 RAE21UPB17E20 SLP131 P0001 T00220011 |
| 02:51 PST |  Overcast | 2°C / 36°F | 1°C / 34°F | 93% | 1013 mb (29.91 in) | ESE 6 kph (ESE 3.5 mph) | 0.25 mm (0.01 in) | 10SM |
| | KPAE 221051Z AUTO 11003KT 10SM BKN006 BKN027 OVC042 02/01 A2990 RMK AO2 RAE21UPB17E20 P0001 |
| 02:42 PST |  Overcast | 2°C / 36°F | 1°C / 34°F | 93% | 1013 mb (29.91 in) | ESE 6 kph (ESE 3.5 mph) | 0.25 mm (0.01 in) | 9SM |
| | KPAE 221042Z AUTO 11003KT 9SM SCT006 BKN021 OVC042 02/01 A2990 RMK AO2 RAE21UPB17E20 P0001 |
| 02:17 PST |  Overcast Unknown Precip | 2°C / 36°F | 1°C / 34°F | 93% | 1012 mb (29.88 in) | SE 6 kph (SE 3.5 mph) | 0.25 mm (0.01 in) | 9SM |
| | KPAE 221017Z AUTO 12003KT 9SM UP FEW006 BKN013 OVC021 02/01 A2989 RMK AO2 RAE17UPB17 P0001 |
| 01:53 PST |  Overcast Light Rain | 2°C / 36°F | 1°C / 34°F | 93% | 1012 mb (29.88 in) | SE 9 kph (SE 5.8 mph) | 0.25 mm (0.01 in) | 10SM |
| | KPAE 220953Z AUTO 12005KT 10SM -RA OVC013 02/01 A2987 RMK AO2 RAB09 SLP119 P0001 T00220011 |
| 01:35 PST |  Overcast Light Rain | 2°C / 36°F | 1°C / 34°F | 93% | 1011 mb (29.85 in) | SE 7 kph (SE 4.6 mph) | 0.25 mm (0.01 in) | 5SM |
| | KPAE 220935Z AUTO 12004KT 5SM -RA BR BKN011 BKN016 OVC022 02/01 A2986 RMK AO2 RAB09 P0001 |
| 00:53 PST |  Overcast | 3°C / 37°F | 1°C / 34°F | 87% | 1010 mb (29.83 in) | SSE 6 kph (SSE 3.5 mph) | - | 10SM |
| | KPAE 220853Z AUTO 15003KT 10SM BKN017 OVC022 03/01 A2984 RMK AO2 SLP110 T00280006 51018 |