| 17:53 PST |  Partly Cloudy | 11°C / 52°F | 3°C / 37°F | 58% | 1016 mb (30 in) | NW 6 kph (NW 3.5 mph) | - | 10SM |
| | KSJC 260153Z 32003KT 10SM FEW050 11/03 A2999 RMK AO2 SLP156 T01110028 |
| 16:53 PST |  Partly Cloudy | 11°C / 52°F | 2°C / 36°F | 54% | 1015 mb (29.97 in) | NW 11 kph (NW 6.9 mph) | - | 10SM |
| | KSJC 260053Z 31006KT 10SM FEW050 11/02 A2998 RMK AO2 SLP153 T01110017 |
| 15:53 PST |  Partly Cloudy | 16°C / 61°F | 2°C / 36°F | 39% | 1015 mb (29.97 in) | NNW 7 kph (NNW 4.6 mph) | - | 10SM |
| | KSJC 252353Z 33004KT 10SM FEW055 16/02 A2998 RMK AO2 SLP153 T01560017 10156 20072 56018 |
| 14:53 PST |  Partly Cloudy | 15°C / 59°F | 2°C / 36°F | 42% | 1016 mb (30 in) | W 7 kph (W 4.6 mph) | - | 10SM |
| | KSJC 252253Z 28004KT 10SM FEW055 15/02 A3000 RMK AO2 SLP158 T01500022 |
| 13:53 PST |  Clear | 14°C / 57°F | 1°C / 34°F | 41% | 1016 mb (30 in) | Calm | - | 10SM |
| | KSJC 252153Z 00000KT 10SM CLR 14/01 A3001 RMK AO2 SLP162 T01440006 |
| 12:53 PST |  Clear | 13°C / 55°F | -1°C / 30°F | 38% | 1017 mb (30.03 in) | Calm | - | 10SM |
| | KSJC 252053Z 00000KT 10SM CLR 13/M01 A3004 RMK AO2 SLP170 T01331006 58029 |
| 11:53 PST |  Clear | 12°C / 54°F | 1°C / 34°F | 47% | 1018 mb (30.06 in) | Calm | - | 10SM |
| | KSJC 251953Z 00000KT 10SM CLR 12/01 A3007 RMK AO2 SLP182 T01170006 |
| 10:53 PST |  Clear | 9°C / 48°F | 1°C / 34°F | 58% | 1019 mb (30.09 in) | Calm | - | 10SM |
| | KSJC 251853Z 00000KT 10SM CLR 09/01 A3010 RMK AO2 SLP191 T00940011 |
| 09:53 PST |  Clear | 7°C / 45°F | 2°C / 36°F | 71% | 1020 mb (30.12 in) | Calm | - | 10SM |
| | KSJC 251753Z 00000KT 10SM CLR 07/02 A3012 RMK AO2 SLP199 T00720017 10072 20006 53008 |
| 08:53 PST |  Clear | 4°C / 39°F | 1°C / 34°F | 81% | 1020 mb (30.12 in) | S 6 kph (S 3.5 mph) | - | 10SM |
| | KSJC 251653Z 17003KT 10SM CLR 04/01 A3011 RMK AO2 SLP197 T00440006 |
| 07:53 PST |  Partly Cloudy | 2°C / 36°F | -1°C / 30°F | 81% | 1019 mb (30.09 in) | ENE 7 kph (ENE 4.6 mph) | - | 10SM |
| | KSJC 251553Z 06004KT 10SM FEW060 02/M01 A3010 RMK AO2 SLP192 T00221006 |
| 06:53 PST |  Partly Cloudy | 2°C / 36°F | -1°C / 30°F | 81% | 1019 mb (30.09 in) | SE 7 kph (SE 4.6 mph) | - | 10SM |
| | KSJC 251453Z 14004KT 10SM FEW060 02/M01 A3010 RMK AO2 SLP191 T00171006 55000 |
| 05:53 PST |  Clear | 2°C / 36°F | -1°C / 30°F | 81% | 1019 mb (30.09 in) | Calm | - | 10SM |
| | KSJC 251353Z 00000KT 10SM CLR 02/M01 A3009 RMK AO2 SLP190 T00171011 |
| 04:53 PST |  Clear | 2°C / 36°F | -1°C / 30°F | 81% | 1019 mb (30.09 in) | ENE 6 kph (ENE 3.5 mph) | - | 10SM |
| | KSJC 251253Z AUTO 07003KT 10SM CLR 02/M01 A3009 RMK AO2 SLP189 T00221006 FZRANO |
| 03:53 PST |  Clear | 2°C / 36°F | -1°C / 30°F | 81% | 1019 mb (30.09 in) | ESE 6 kph (ESE 3.5 mph) | - | 10SM |
| | KSJC 251153Z AUTO 11003KT 10SM CLR 02/M01 A3010 RMK AO2 SLP191 T00221006 10061 20017 58001 FZRANO |
| 02:53 PST |  Clear | 4°C / 39°F | 0°C / 32°F | 75% | 1020 mb (30.12 in) | Calm | - | 10SM |
| | KSJC 251053Z AUTO 00000KT 10SM CLR 04/00 A3011 RMK AO2 SLP195 T00390000 |
| 01:53 PST |  Clear | 4°C / 39°F | 0°C / 32°F | 75% | 1019 mb (30.09 in) | Calm | - | 10SM |
| | KSJC 250953Z AUTO 00000KT 10SM CLR 04/00 A3010 RMK AO2 SLP192 T00440000 |
| 00:53 PST |  Clear | 4°C / 39°F | 0°C / 32°F | 75% | 1019 mb (30.09 in) | Calm | - | 10SM |
| | KSJC 250853Z AUTO 00000KT 10SM CLR 04/00 A3010 RMK AO2 SLP193 T00440000 58009 |