| 04:55 CST |  Overcast | -6°C / 21°F | -7°C / 19°F | 93% | 1024 mb (30.24 in) | Calm | - | 10SM |
| | KCMY 081055Z AUTO 00000KT 10SM BKN034 OVC044 M06/M07 A3023 RMK AO2 |
| 04:35 CST |  Overcast | -7°C / 19°F | -8°C / 18°F | 93% | 1024 mb (30.24 in) | Calm | - | 10SM |
| | KCMY 081035Z AUTO 00000KT 10SM BKN046 OVC060 M07/M08 A3024 RMK AO2 |
| 04:15 CST |  Overcast | -7°C / 19°F | -8°C / 18°F | 93% | 1024 mb (30.24 in) | Calm | - | 10SM |
| | KCMY 081015Z AUTO 00000KT 10SM BKN060 OVC080 M07/M08 A3024 RMK AO2 |
| 03:55 CST |  Overcast | -7°C / 19°F | -8°C / 18°F | 93% | 1024 mb (30.24 in) | Calm | - | 10SM |
| | KCMY 080955Z AUTO 00000KT 10SM BKN080 OVC110 M07/M08 A3025 RMK AO2 |
| 03:35 CST |  Mostly Cloudy | -7°C / 19°F | -8°C / 18°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080935Z AUTO 00000KT 10SM BKN110 M07/M08 A3026 RMK AO2 |
| 03:15 CST |  Partly Cloudy | -7°C / 19°F | -8°C / 18°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080915Z AUTO 00000KT 10SM SCT090 SCT120 M07/M08 A3026 RMK AO2 |
| 02:55 CST |  Mostly Cloudy | -7°C / 19°F | -8°C / 18°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080855Z AUTO 00000KT 10SM BKN100 M07/M08 A3026 RMK AO2 |
| 02:35 CST |  Overcast | -7°C / 19°F | -8°C / 18°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080835Z AUTO 00000KT 10SM OVC100 M07/M08 A3027 RMK AO2 |
| 02:15 CST |  Overcast | -7°C / 19°F | -8°C / 18°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080815Z AUTO 00000KT 10SM OVC110 M07/M08 A3027 RMK AO2 |
| 01:55 CST |  Overcast | -7°C / 19°F | -8°C / 18°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080755Z AUTO 00000KT 10SM OVC110 M07/M08 A3027 RMK AO2 |
| 01:35 CST |  Mostly Cloudy | -9°C / 16°F | -10°C / 14°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080735Z AUTO 00000KT 10SM BKN120 M09/M10 A3027 RMK AO2 |
| 01:15 CST |  Partly Cloudy | -9°C / 16°F | -10°C / 14°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080715Z AUTO 00000KT 10SM SCT120 M09/M10 A3028 RMK AO2 |
| 00:55 CST |  Clear | -9°C / 16°F | -10°C / 14°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080655Z AUTO 00000KT 10SM CLR M09/M10 A3028 RMK AO2 |
| 00:35 CST |  Partly Cloudy | -9°C / 16°F | -10°C / 14°F | 93% | 1026 mb (30.3 in) | Calm | - | 10SM |
| | KCMY 080635Z AUTO 00000KT 10SM SCT120 M09/M10 A3029 RMK AO2 |
| 00:15 CST |  Partly Cloudy | -9°C / 16°F | -10°C / 14°F | 93% | 1025 mb (30.27 in) | Calm | - | 10SM |
| | KCMY 080615Z AUTO 00000KT 10SM SCT120 M09/M10 A3028 RMK AO2 |