| 12:01 EST |  Clear | 4°C / 39°F | -1°C / 30°F | 70% | 1026 mb (30.3 in) | Calm | - | 10SM |
| | KMRN 071701Z AUTO 00000KT 10SM CLR 04/M01 A3031 RMK AO2 |
| 11:40 EST |  Clear | 4°C / 39°F | -2°C / 28°F | 65% | 1027 mb (30.33 in) | Calm | - | 10SM |
| | KMRN 071640Z AUTO 00000KT 10SM CLR 04/M02 A3032 RMK AO2 |
| 11:21 EST |  Clear | 3°C / 37°F | -1°C / 30°F | 75% | 1027 mb (30.33 in) | Calm | - | 10SM |
| | KMRN 071621Z AUTO 00000KT 10SM CLR 03/M01 A3033 RMK AO2 |
| 11:00 EST |  Clear | 3°C / 37°F | -2°C / 28°F | 70% | 1027 mb (30.33 in) | Calm | - | 10SM |
| | KMRN 071600Z AUTO 00000KT 10SM CLR 03/M02 A3034 RMK AO2 |
| 10:40 EST |  Clear | 2°C / 36°F | 0°C / 32°F | 87% | 1027 mb (30.33 in) | Calm | - | 10SM |
| | KMRN 071540Z AUTO 00000KT 10SM CLR 02/00 A3033 RMK AO2 |
| 10:21 EST |  Clear | 1°C / 34°F | -1°C / 30°F | 87% | 1027 mb (30.33 in) | SE 6 kph (SE 3.5 mph) | - | 10SM |
| | KMRN 071521Z AUTO 14003KT 10SM CLR 01/M01 A3034 RMK AO2 |
| 10:00 EST |  Clear | 1°C / 34°F | -1°C / 30°F | 87% | 1027 mb (30.33 in) | SSE 6 kph (SSE 3.5 mph) | - | 10SM |
| | KMRN 071500Z AUTO 16003KT 10SM CLR 01/M01 A3034 RMK AO2 |
| 09:40 EST |  Clear | -1°C / 30°F | -1°C / 30°F | 100% | 1028 mb (30.36 in) | Calm | - | 10SM |
| | KMRN 071440Z AUTO 00000KT 10SM CLR M01/M01 A3035 RMK AO2 |
| 09:20 EST |  Partly Cloudy | -2°C / 28°F | -2°C / 28°F | 100% | 1028 mb (30.36 in) | Calm | - | 10SM |
| | KMRN 071420Z AUTO 00000KT 10SM SCT023 M02/M02 A3035 RMK AO2 |
| 09:00 EST |  Overcast | -2°C / 28°F | -2°C / 28°F | 100% | 1028 mb (30.36 in) | Calm | - | 7SM |
| | KMRN 071400Z AUTO 00000KT 7SM OVC023 M02/M02 A3035 RMK AO2 |
| 08:40 EST |  Overcast Fog And Mist | -2°C / 28°F | -2°C / 28°F | 100% | 1028 mb (30.36 in) | Calm | - | 5SM |
| | KMRN 071340Z AUTO 00000KT 5SM BR OVC023 M02/M02 A3035 RMK AO2 |
| 08:20 EST |  Overcast Fog And Mist | -3°C / 27°F | -3°C / 27°F | 100% | 1027 mb (30.33 in) | Calm | - | 4SM |
| | KMRN 071320Z AUTO 00000KT 4SM BR OVC021 M03/M03 A3033 RMK AO2 |
| 08:00 EST |  Overcast Fog And Mist | -4°C / 25°F | -4°C / 25°F | 100% | 1027 mb (30.33 in) | Calm | - | 4SM |
| | KMRN 071300Z AUTO 00000KT 4SM BR OVC023 M04/M04 A3033 RMK AO2 |
| 07:40 EST |  Overcast Fog And Mist | -4°C / 25°F | -4°C / 25°F | 100% | 1027 mb (30.33 in) | Calm | - | 4SM |
| | KMRN 071240Z AUTO 00000KT 4SM BR OVC025 M04/M04 A3034 RMK AO2 |
| 07:20 EST |  Mostly Cloudy Fog And Mist | -4°C / 25°F | -5°C / 23°F | 93% | 1027 mb (30.33 in) | Calm | - | 4SM |
| | KMRN 071220Z AUTO 00000KT 4SM BR SCT025 BKN120 M04/M05 A3034 RMK AO2 |
| 07:00 EST |  Clear Fog And Mist | -6°C / 21°F | -6°C / 21°F | 100% | 1027 mb (30.33 in) | NW 6 kph (NW 3.5 mph) | - | 5SM |
| | KMRN 071200Z AUTO 32003KT 5SM BR CLR M06/M06 A3033 RMK AO2 |
| 06:40 EST |  Clear Fog And Mist | -6°C / 21°F | -6°C / 21°F | 100% | 1027 mb (30.33 in) | Calm | - | 5SM |
| | KMRN 071140Z AUTO 00000KT 5SM BR CLR M06/M06 A3032 RMK AO2 |
| 06:20 EST |  Obscured Fog And Mist | -5°C / 23°F | -6°C / 21°F | 93% | 1027 mb (30.33 in) | Calm | - | 1 3/4SM |
| | KMRN 071120Z AUTO 00000KT 1 3/4SM BR VV007 M05/M06 A3032 RMK AO2 |
| 06:00 EST |  Obscured Fog | -4°C / 25°F | -5°C / 23°F | 93% | 1027 mb (30.33 in) | Calm | - | 1/2SM |
| | KMRN 071100Z AUTO 00000KT 1/2SM FZFG VV005 M04/M05 A3033 RMK AO2 |
| 05:40 EST |  Mostly Cloudy Fog | -5°C / 23°F | -5°C / 23°F | 100% | 1027 mb (30.33 in) | Calm | - | 1/2SM |
| | KMRN 071040Z AUTO 00000KT 1/2SM FZFG BKN001 M05/M05 A3033 RMK AO2 |
| 05:20 EST |  Mostly Cloudy Fog And Mist | -4°C / 25°F | -5°C / 23°F | 93% | 1027 mb (30.33 in) | Calm | - | 3/4SM |
| | KMRN 071020Z AUTO 00000KT 3/4SM BR BKN001 M04/M05 A3034 RMK AO2 |
| 05:00 EST |  Clear Fog And Mist | -4°C / 25°F | -5°C / 23°F | 93% | 1027 mb (30.33 in) | Calm | - | 5SM |
| | KMRN 071000Z AUTO 00000KT 5SM BR CLR M04/M05 A3033 RMK AO2 |
| 04:40 EST |  Clear Fog And Mist | -6°C / 21°F | -6°C / 21°F | 100% | 1027 mb (30.33 in) | Calm | - | 5SM |
| | KMRN 070940Z AUTO 00000KT 5SM BR CLR M06/M06 A3033 RMK AO2 |
| 04:20 EST |  Clear Fog And Mist | -5°C / 23°F | -6°C / 21°F | 93% | 1027 mb (30.33 in) | Calm | - | 5SM |
| | KMRN 070920Z AUTO 00000KT 5SM BR CLR M05/M06 A3033 RMK AO2 |
| 04:00 EST |  Clear Fog And Mist | -4°C / 25°F | -5°C / 23°F | 93% | 1027 mb (30.33 in) | Calm | - | 5SM |
| | KMRN 070900Z AUTO 00000KT 5SM BR CLR M04/M05 A3033 RMK AO2 |
| 03:40 EST |  Clear Fog And Mist | -4°C / 25°F | -4°C / 25°F | 100% | 1027 mb (30.33 in) | Calm | - | 5SM |
| | KMRN 070840Z AUTO 00000KT 5SM BR CLR M04/M04 A3034 RMK AO2 |
| 03:21 EST |  Clear Fog And Mist | -4°C / 25°F | -5°C / 23°F | 93% | 1027 mb (30.33 in) | Calm | - | 5SM |
| | KMRN 070821Z AUTO 00000KT 5SM BR CLR M04/M05 A3034 RMK AO2 |
| 03:01 EST |  Clear Fog And Mist | -4°C / 25°F | -4°C / 25°F | 100% | 1027 mb (30.33 in) | Calm | - | 5SM |
| | KMRN 070801Z AUTO 00000KT 5SM BR CLR M04/M04 A3034 RMK AO2 |
| 02:40 EST |  Clear Fog And Mist | -4°C / 25°F | -4°C / 25°F | 100% | 1027 mb (30.33 in) | Calm | - | 5SM |
| | KMRN 070740Z AUTO 00000KT 5SM BR CLR M04/M04 A3034 RMK AO2 |
| 02:20 EST |  Clear Fog And Mist | -3°C / 27°F | -3°C / 27°F | 100% | 1027 mb (30.33 in) | Calm | - | 5SM |
| | KMRN 070720Z AUTO 00000KT 5SM BR CLR M03/M03 A3034 RMK AO2 |
| 02:01 EST |  Clear Fog And Mist | -3°C / 27°F | -4°C / 25°F | 93% | 1027 mb (30.33 in) | Calm | - | 4SM |
| | KMRN 070701Z AUTO 00000KT 4SM BR CLR M03/M04 A3033 RMK AO2 |
| 01:40 EST |  Clear Fog And Mist | -2°C / 28°F | -3°C / 27°F | 93% | 1027 mb (30.33 in) | Calm | - | 5SM |
| | KMRN 070640Z AUTO 00000KT 5SM BR CLR M02/M03 A3034 RMK AO2 |
| 01:20 EST |  Clear | -2°C / 28°F | -2°C / 28°F | 100% | 1027 mb (30.33 in) | NW 6 kph (NW 3.5 mph) | - | 7SM |
| | KMRN 070620Z AUTO 32003KT 7SM CLR M02/M02 A3033 RMK AO2 |
| 01:00 EST |  Clear | -2°C / 28°F | -2°C / 28°F | 100% | 1027 mb (30.33 in) | Calm | - | 7SM |
| | KMRN 070600Z AUTO 00000KT 7SM CLR M02/M02 A3032 RMK AO2 |
| 00:40 EST |  Clear | -2°C / 28°F | -2°C / 28°F | 100% | 1027 mb (30.33 in) | Calm | - | 7SM |
| | KMRN 070540Z AUTO 00000KT 7SM CLR M02/M02 A3034 RMK AO2 |
| 00:20 EST |  Clear | -2°C / 28°F | -2°C / 28°F | 100% | 1028 mb (30.36 in) | Calm | - | 7SM |
| | KMRN 070520Z AUTO 00000KT 7SM CLR M02/M02 A3035 RMK AO2 |
| 00:00 EST |  Clear | -2°C / 28°F | -3°C / 27°F | 93% | 1027 mb (30.33 in) | Calm | - | 7SM |
| | KMRN 070500Z AUTO 00000KT 7SM CLR M02/M03 A3034 RMK AO2 |