| 09:55 EST |  Clear | -2°C / 28°F | -4°C / 25°F | 86% | 1030 mb (30.42 in) | NE 6 kph (NE 3.5 mph) | - | 10SM |
| | KSFZ 251455Z 04003KT 10SM CLR M02/M04 A3042 RMK AO1 52003 |
| 09:35 EST |  Clear | -2°C / 28°F | -4°C / 25°F | 86% | 1030 mb (30.42 in) | NE 11 kph (NE 6.9 mph) | - | 10SM |
| | KSFZ 251435Z 05006KT 10SM CLR M02/M04 A3041 RMK AO1 |
| 09:15 EST |  Clear | -2°C / 28°F | -4°C / 25°F | 86% | 1030 mb (30.42 in) | NE 11 kph (NE 6.9 mph) | - | 10SM |
| | KSFZ 251415Z 04006KT 10SM CLR M02/M04 A3041 RMK AO1 |
| 08:55 EST |  Clear | -3°C / 27°F | -5°C / 23°F | 86% | 1030 mb (30.42 in) | NE 13 kph (NE 8.1 mph) | - | 10SM |
| | KSFZ 251355Z 03007KT 10SM CLR M03/M05 A3041 RMK AO1 |
| 08:35 EST |  Clear | -3°C / 27°F | -5°C / 23°F | 86% | 1030 mb (30.42 in) | NE 13 kph (NE 8.1 mph) | - | 10SM |
| | KSFZ 251335Z 03007KT 10SM CLR M03/M05 A3041 RMK AO1 |
| 08:15 EST |  Clear | -3°C / 27°F | -6°C / 21°F | 80% | 1030 mb (30.42 in) | NE 13 kph (NE 8.1 mph) | - | 10SM |
| | KSFZ 251315Z 04007KT 10SM CLR M03/M06 A3041 RMK AO1 |
| 07:55 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1030 mb (30.42 in) | NE 11 kph (NE 6.9 mph) | - | 10SM |
| | KSFZ 251255Z 03006KT 10SM CLR M04/M06 A3041 RMK AO1 |
| 07:35 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1030 mb (30.42 in) | NNE 9 kph (NNE 5.8 mph) | - | 10SM |
| | KSFZ 251235Z 02005KT 10SM CLR M04/M06 A3041 RMK AO1 |
| 07:15 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1030 mb (30.42 in) | N 6 kph (N 3.5 mph) | - | 10SM |
| | KSFZ 251215Z 36003KT 10SM CLR M04/M06 A3042 RMK AO1 |
| 06:55 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1030 mb (30.42 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KSFZ 251155Z 01004KT 10SM CLR M04/M06 A3041 RMK AO1 11010 21050 52010 |
| 06:35 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1029 mb (30.39 in) | NNE 9 kph (NNE 5.8 mph) | - | 10SM |
| | KSFZ 251135Z 02005KT 10SM CLR M04/M06 A3040 RMK AO1 |
| 06:15 EST |  Clear | -4°C / 25°F | -5°C / 23°F | 93% | 1029 mb (30.39 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KSFZ 251115Z 01004KT 10SM CLR M04/M05 A3039 RMK AO1 |
| 05:55 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1029 mb (30.39 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KSFZ 251055Z 01004KT 10SM CLR M04/M06 A3039 RMK AO1 |
| 05:35 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1029 mb (30.39 in) | NNE 9 kph (NNE 5.8 mph) | - | 10SM |
| | KSFZ 251035Z 02005KT 10SM CLR M04/M06 A3039 RMK AO1 |
| 05:15 EST |  Clear | -5°C / 23°F | -7°C / 19°F | 86% | 1029 mb (30.39 in) | N 6 kph (N 3.5 mph) | - | 10SM |
| | KSFZ 251015Z 36003KT 10SM CLR M05/M07 A3040 RMK AO1 |
| 04:55 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1029 mb (30.39 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KSFZ 250955Z 01004KT 10SM CLR M04/M06 A3039 RMK AO1 |
| 04:35 EST |  Clear | -4°C / 25°F | -6°C / 21°F | 86% | 1029 mb (30.39 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KSFZ 250935Z 36004KT 10SM CLR M04/M06 A3039 RMK AO1 |
| 04:15 EST |  Clear | -3°C / 27°F | -6°C / 21°F | 80% | 1029 mb (30.39 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KSFZ 250915Z 01005KT 10SM CLR M03/M06 A3039 RMK AO1 |
| 03:55 EST |  Clear | -3°C / 27°F | -5°C / 23°F | 86% | 1029 mb (30.39 in) | NE 11 kph (NE 6.9 mph) | - | 10SM |
| | KSFZ 250855Z 03006KT 10SM CLR M03/M05 A3038 RMK AO1 57007 |
| 03:35 EST |  Clear | -3°C / 27°F | -5°C / 23°F | 86% | 1029 mb (30.39 in) | NNE 11 kph (NNE 6.9 mph) | - | 10SM |
| | KSFZ 250835Z 02006KT 10SM CLR M03/M05 A3039 RMK AO1 |
| 03:15 EST |  Clear | -3°C / 27°F | -6°C / 21°F | 80% | 1029 mb (30.39 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KSFZ 250815Z 01005KT 10SM CLR M03/M06 A3040 RMK AO1 |
| 02:55 EST |  Partly Cloudy | -3°C / 27°F | -5°C / 23°F | 86% | 1029 mb (30.39 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KSFZ 250755Z 01005KT 10SM FEW023 M03/M05 A3039 RMK AO1 |
| 02:35 EST |  Mostly Cloudy | -3°C / 27°F | -5°C / 23°F | 86% | 1029 mb (30.39 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KSFZ 250735Z 01005KT 10SM BKN023 M03/M05 A3040 RMK AO1 |
| 02:15 EST |  Mostly Cloudy | -2°C / 28°F | -5°C / 23°F | 80% | 1029 mb (30.39 in) | NNE 9 kph (NNE 5.8 mph) | - | 10SM |
| | KSFZ 250715Z 02005KT 10SM BKN023 M02/M05 A3040 RMK AO1 |
| 01:55 EST |  Mostly Cloudy | -2°C / 28°F | -4°C / 25°F | 86% | 1029 mb (30.39 in) | NE 11 kph (NE 6.9 mph) | - | 10SM |
| | KSFZ 250655Z 03006KT 10SM BKN023 M02/M04 A3039 RMK AO1 |
| 01:35 EST |  Overcast | -1°C / 30°F | -4°C / 25°F | 80% | 1029 mb (30.39 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KSFZ 250635Z 01005KT 10SM OVC025 M01/M04 A3039 RMK AO1 |
| 01:15 EST |  Overcast | -1°C / 30°F | -4°C / 25°F | 80% | 1029 mb (30.39 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KSFZ 250615Z 01004KT 10SM OVC025 M01/M04 A3039 RMK AO1 |
| 00:55 EST |  Overcast | -1°C / 30°F | -4°C / 25°F | 80% | 1029 mb (30.39 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KSFZ 250555Z 01005KT 10SM OVC025 M01/M04 A3040 RMK AO1 10000 21030 52010 |
| 00:35 EST |  Overcast | -1°C / 30°F | -4°C / 25°F | 80% | 1029 mb (30.39 in) | N 6 kph (N 3.5 mph) | - | 10SM |
| | KSFZ 250535Z 35003KT 10SM OVC025 M01/M04 A3040 RMK AO1 |
| 00:15 EST |  Overcast | -1°C / 30°F | -4°C / 25°F | 80% | 1029 mb (30.39 in) | N 7 kph (N 4.6 mph) | - | 10SM |
| | KSFZ 250515Z 35004KT 10SM OVC025 M01/M04 A3040 RMK AO1 |