| NWS Forecast for: Petroleum County Issued by: National Weather Service Glasgow, MT Last Update: 511 AM MDT Sun Sep 27 2026 |  |
| Today: Partly sunny this morning, then becoming mostly cloudy. Highs in the lower 60s. North wind around 5 mph, becoming southeast this afternoon. Tonight: Mostly cloudy. Lows in the mid 40s. Southeast wind 5 to 10 mph, becoming west after midnight. Monday: Mostly cloudy in the morning, then becoming mostly sunny. Highs around 70. Northwest wind around 5 mph. Monday Night: Mostly clear. Lows in the mid 40s. Southeast wind around 5 mph, becoming southwest after midnight. Tuesday: Sunny. Highs in the upper 70s. West wind 5 to 10 mph. Tuesday Night And Wednesday: Mostly clear. Lows around 50. Highs around 70. Wednesday Night: Mostly clear. Lows in the mid 40s. Thursday Through Friday: Partly cloudy. Highs in the upper 60s. Lows in the upper 40s. Friday Night: A slight chance of showers. Lows in the mid 40s. Saturday: Partly sunny. Highs in the lower 60s. | |
| Zone Forecast: Petroleum County | |
Visit your local NWS office at: https://www.weather.gov/ggw |