| 06:15 MST | 
Overcast | -19°C / -2°F | -27°C / -17°F | 49% | 1016 mb
(30 in) | SSE 6 kph
(SSE 3.5 mph) | - | 10SM |
| | KSMN 091315Z AUTO 16003KT 10SM FEW080 OVC100 M19/M27 A3000
RMK AO1 |
| 05:55 MST |
Overcast | -19°C / -2°F | -22°C / -8°F | 77% | 1016 mb
(30 in) | Calm | - | 10SM |
| | KSMN 091255Z AUTO 00000KT 10SM OVC100 M19/M22 A3000
RMK AO1 |
| 05:35 MST |
Overcast | -19°C / -2°F | -25°C / -13°F | 59% | 1016 mb
(30 in) | Calm | - | 10SM |
| | KSMN 091235Z AUTO 00000KT 10SM OVC110 M19/M25 A3000
RMK AO1 |
| 05:15 MST | 
Mostly Cloudy | -19°C / -2°F | -26°C / -15°F | 54% | 1016 mb
(30 in) | Calm | - | 10SM |
| | KSMN 091215Z AUTO 00000KT 10SM FEW055 BKN110 M19/M26 A2999
RMK AO1 |
| 04:55 MST |
Mostly Cloudy | -19°C / -2°F | -22°C / -8°F | 77% | 1016 mb
(30 in) | Calm | - | 10SM |
| | KSMN 091155Z AUTO 00000KT 10SM BKN055 M19/M22 A2999
RMK AO1 11190 21220 52003 |
| 04:35 MST |
Overcast | -19°C / -2°F | -24°C / -11°F | 65% | 1015 mb
(29.97 in) | Calm | - | 10SM |
| | KSMN 091135Z AUTO 00000KT 10SM OVC055 M19/M24 A2998
RMK AO1 |
| 04:15 MST |
Overcast | -19°C / -2°F | -26°C / -15°F | 54% | 1015 mb
(29.97 in) | Calm | - | 10SM |
| | KSMN 091115Z AUTO 00000KT 10SM OVC065 M19/M26 A2998
RMK AO1 |
| 03:55 MST |
Overcast | -19°C / -2°F | -23°C / -9°F | 71% | 1016 mb
(30 in) | Calm | - | 10SM |
| | KSMN 091055Z AUTO 00000KT 10SM OVC065 M19/M23 A2999
RMK AO1 |
| 03:35 MST |
Overcast | -19°C / -2°F | -25°C / -13°F | 59% | 1016 mb
(30 in) | Calm | - | 10SM |
| | KSMN 091035Z AUTO 00000KT 10SM OVC065 M19/M25 A3000
RMK AO1 |
| 03:15 MST |
Overcast | -19°C / -2°F | -24°C / -11°F | 65% | 1016 mb
(30 in) | Calm | - | 10SM |
| | KSMN 091015Z AUTO 00000KT 10SM OVC065 M19/M24 A3000
RMK AO1 |
| 02:55 MST |
Overcast | -20°C / -4°F | -23°C / -9°F | 77% | 1016 mb
(30 in) | Calm | - | 10SM |
| | KSMN 090955Z AUTO 00000KT 10SM OVC065 M20/M23 A3000
RMK AO1 |
| 02:35 MST |
Overcast | -21°C / -6°F | -26°C / -15°F | 64% | 1016 mb
(30 in) | Calm | - | 10SM |
| | KSMN 090935Z AUTO 00000KT 10SM OVC065 M21/M26 A2999
RMK AO1 TSNO |
| 02:15 MST |
Mostly Cloudy | -21°C / -6°F | -26°C / -15°F | 64% | 1015 mb
(29.97 in) | Calm | - | 10SM |
| | KSMN 090915Z AUTO 00000KT 10SM BKN065 M21/M26 A2998
RMK AO1 TSNO |
| 01:55 MST | 
Partly Cloudy | -22°C / -8°F | -27°C / -17°F | 64% | 1015 mb
(29.97 in) | Calm | - | 10SM |
| | KSMN 090855Z AUTO 00000KT 10SM FEW065 M22/M27 A2998
RMK AO1 54000 |
| 01:35 MST |
Mostly Cloudy | -22°C / -8°F | -27°C / -17°F | 64% | 1015 mb
(29.97 in) | Calm | - | 10SM |
| | KSMN 090835Z AUTO 00000KT 10SM BKN065 M22/M27 A2998
RMK AO1 |
| 01:15 MST |
Mostly Cloudy | -21°C / -6°F | -26°C / -15°F | 64% | 1015 mb
(29.97 in) | Calm | - | 10SM |
| | KSMN 090815Z AUTO 00000KT 10SM BKN065 M21/M26 A2998
RMK AO1 |
| 00:55 MST |
Partly Cloudy | -21°C / -6°F | -28°C / -18°F | 54% | 1015 mb
(29.97 in) | Calm | - | 10SM |
| | KSMN 090755Z AUTO 00000KT 10SM FEW065 M21/M28 A2998
RMK AO1 |
| 00:35 MST |
Mostly Cloudy | -21°C / -6°F | -27°C / -17°F | 59% | 1016 mb
(30 in) | Calm | - | 7SM |
| | KSMN 090735Z AUTO 00000KT 7SM BKN065 M21/M27 A2999
RMK AO1 |
| 00:15 MST |
Mostly Cloudy | -21°C / -6°F | -25°C / -13°F | 70% | 1016 mb
(30 in) | Calm | - | 8SM |
| | KSMN 090715Z AUTO 00000KT 8SM BKN065 M21/M25 A2999
RMK AO1 |
