| 09:15 MST |  Overcast | -11°C / 12°F | -20°C / -4°F | 48% | 1018 mb (30.06 in) | SE 11 kph (SE 6.9 mph) | - | 10SM |
| | KSMN 061615Z AUTO 13006KT 10SM OVC070 M11/M20 A3006 RMK AO1 |
| 08:55 MST |  Overcast | -12°C / 10°F | -20°C / -4°F | 52% | 1018 mb (30.06 in) | Calm | - | 10SM |
| | KSMN 061555Z AUTO 00000KT 10SM OVC070 M12/M20 A3005 RMK AO1 |
| 08:35 MST |  Overcast | -12°C / 10°F | -21°C / -6°F | 47% | 1018 mb (30.06 in) | NNE 13 kph (NNE 8.1 mph) | - | 10SM |
| | KSMN 061535Z AUTO 02007KT 10SM OVC070 M12/M21 A3005 RMK AO1 |
| 08:15 MST |  Overcast | -13°C / 9°F | -22°C / -8°F | 47% | 1017 mb (30.03 in) | NNE 9 kph (NNE 5.8 mph) | - | 10SM |
| | KSMN 061515Z AUTO 02005KT 10SM OVC070 M13/M22 A3004 RMK AO1 |
| 07:55 MST |  Overcast | -12°C / 10°F | -21°C / -6°F | 47% | 1017 mb (30.03 in) | N 13 kph (N 8.1 mph) | - | 10SM |
| | KSMN 061455Z AUTO 01007KT 10SM OVC070 M12/M21 A3004 RMK AO1 52003 |
| 07:35 MST |  Mostly Cloudy | -13°C / 9°F | -21°C / -6°F | 51% | 1017 mb (30.03 in) | NNE 22 kph (NNE 13.8 mph) | - | 10SM |
| | KSMN 061435Z AUTO 02012G15KT 10SM BKN070 M13/M21 A3003 RMK AO1 |
| 07:15 MST |  Mostly Cloudy | -13°C / 9°F | -22°C / -8°F | 47% | 1017 mb (30.03 in) | NE 6 kph (NE 3.5 mph) | - | 10SM |
| | KSMN 061415Z AUTO 03003KT 10SM BKN070 M13/M22 A3003 RMK AO1 |
| 06:55 MST |  Overcast | -13°C / 9°F | -20°C / -4°F | 56% | 1017 mb (30.03 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KSMN 061355Z AUTO 01005KT 10SM OVC070 M13/M20 A3003 RMK AO1 |
| 06:35 MST |  Overcast | -13°C / 9°F | -22°C / -8°F | 47% | 1017 mb (30.03 in) | NE 15 kph (NE 9.2 mph) | - | 10SM |
| | KSMN 061335Z AUTO 03008KT 10SM OVC070 M13/M22 A3003 RMK AO1 |
| 06:15 MST |  Overcast | -13°C / 9°F | -21°C / -6°F | 51% | 1017 mb (30.03 in) | NE 13 kph (NE 8.1 mph) | - | 10SM |
| | KSMN 061315Z AUTO 03007KT 10SM OVC070 M13/M21 A3003 RMK AO1 |
| 05:55 MST |  Mostly Cloudy | -13°C / 9°F | -21°C / -6°F | 51% | 1017 mb (30.03 in) | NE 11 kph (NE 6.9 mph) | - | 10SM |
| | KSMN 061255Z AUTO 03006KT 10SM BKN070 M13/M21 A3003 RMK AO1 |
| 05:35 MST |  Overcast | -12°C / 10°F | -21°C / -6°F | 47% | 1017 mb (30.03 in) | NE 17 kph (NE 10.4 mph) | - | 10SM |
| | KSMN 061235Z AUTO 04009KT 10SM OVC070 M12/M21 A3003 RMK AO1 |
| 05:15 MST |  Overcast | -12°C / 10°F | -18°C / 0°F | 61% | 1017 mb (30.03 in) | NE 13 kph (NE 8.1 mph) | - | 10SM |
| | KSMN 061215Z AUTO 04007KT 10SM OVC070 M12/M18 A3003 RMK AO1 |
| 04:55 MST |  Overcast | -14°C / 7°F | -21°C / -6°F | 56% | 1017 mb (30.03 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KSMN 061155Z AUTO 01005KT 10SM OVC070 M14/M21 A3003 RMK AO1 11080 21140 52003 |
| 04:35 MST |  Overcast | -13°C / 9°F | -21°C / -6°F | 51% | 1017 mb (30.03 in) | NNE 13 kph (NNE 8.1 mph) | - | 10SM |
| | KSMN 061135Z AUTO 02007KT 10SM OVC070 M13/M21 A3003 RMK AO1 |
| 04:15 MST |  Mostly Cloudy | -13°C / 9°F | -22°C / -8°F | 47% | 1017 mb (30.03 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KSMN 061115Z AUTO 01005KT 10SM BKN060 M13/M22 A3003 RMK AO1 |
| 03:55 MST |  Partly Cloudy | -12°C / 10°F | -20°C / -4°F | 52% | 1017 mb (30.03 in) | N 9 kph (N 5.8 mph) | - | 10SM |
| | KSMN 061055Z AUTO 35005KT 10SM FEW070 M12/M20 A3003 RMK AO1 |
| 03:35 MST |  Partly Cloudy | -11°C / 12°F | -21°C / -6°F | 44% | 1017 mb (30.03 in) | N 15 kph (N 9.2 mph) | - | 10SM |
| | KSMN 061035Z AUTO 01008KT 10SM SCT070 M11/M21 A3003 RMK AO1 |
| 03:15 MST |  Mostly Cloudy | -12°C / 10°F | -21°C / -6°F | 47% | 1017 mb (30.03 in) | NNE 11 kph (NNE 6.9 mph) | - | 10SM |
| | KSMN 061015Z AUTO 02006KT 10SM BKN070 M12/M21 A3003 RMK AO1 |
| 02:55 MST |  Mostly Cloudy | -12°C / 10°F | -19°C / -2°F | 56% | 1017 mb (30.03 in) | N 13 kph (N 8.1 mph) | - | 10SM |
| | KSMN 060955Z AUTO 01007KT 10SM BKN070 M12/M19 A3003 RMK AO1 |
| 02:35 MST |  Overcast | -11°C / 12°F | -19°C / -2°F | 52% | 1017 mb (30.03 in) | ENE 7 kph (ENE 4.6 mph) | - | 10SM |
| | KSMN 060935Z AUTO 06004KT 10SM OVC070 M11/M19 A3003 RMK AO1 |
| 02:15 MST |  Overcast | -12°C / 10°F | -19°C / -2°F | 56% | 1017 mb (30.03 in) | NE 7 kph (NE 4.6 mph) | - | 10SM |
| | KSMN 060915Z AUTO 05004KT 10SM OVC060 M12/M19 A3002 RMK AO1 |
| 01:55 MST |  Mostly Cloudy | -12°C / 10°F | -20°C / -4°F | 52% | 1017 mb (30.03 in) | NE 9 kph (NE 5.8 mph) | - | 10SM |
| | KSMN 060855Z AUTO 04005KT 10SM BKN060 M12/M20 A3002 RMK AO1 57003 |
| 01:35 MST |  Clear | -12°C / 10°F | -21°C / -6°F | 47% | 1017 mb (30.03 in) | NE 7 kph (NE 4.6 mph) | - | 10SM |
| | KSMN 060835Z AUTO 03004KT 10SM CLR M12/M21 A3002 RMK AO1 |
| 01:15 MST |  Partly Cloudy | -12°C / 10°F | -21°C / -6°F | 47% | 1017 mb (30.03 in) | Calm | - | 10SM |
| | KSMN 060815Z AUTO 00000KT 10SM FEW070 M12/M21 A3002 RMK AO1 |
| 00:55 MST |  Clear | -11°C / 12°F | -22°C / -8°F | 40% | 1017 mb (30.03 in) | ENE 7 kph (ENE 4.6 mph) | - | 10SM |
| | KSMN 060755Z AUTO 06004KT 10SM CLR M11/M22 A3002 RMK AO1 |
| 00:35 MST |  Clear | -12°C / 10°F | -22°C / -8°F | 44% | 1017 mb (30.03 in) | NE 7 kph (NE 4.6 mph) | - | 10SM |
| | KSMN 060735Z AUTO 03004KT 10SM CLR M12/M22 A3002 RMK AO1 |
| 00:15 MST |  Partly Cloudy | -10°C / 14°F | -21°C / -6°F | 41% | 1017 mb (30.03 in) | NE 6 kph (NE 3.5 mph) | - | 10SM |
| | KSMN 060715Z AUTO 04003KT 10SM SCT060 M10/M21 A3003 RMK AO1 |