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 Lewistown Weather Forecast Summary |
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Today
Jun 12th
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Saturday
Jun 13th
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Sunday
Jun 14th
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Monday
Jun 15th
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Tuesday
Jun 16th
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Mix of Cloud and Sun |
Mostly Cloudy |
Mostly Sunny |
Mostly Sunny |
Mostly Sunny |
65°F
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54°F
42°F |
65°F
43°F |
75°F
49°F |
79°F
61°F |
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| Lewistown Detailed Weather Forecast |
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| Friday, June 12th, 2026 |
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Afternoon |
Temperature: 64°F |
| A mix of cloud and sun. Slight chance of a thunderstorm. Windy at times. |
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Evening |
Temperature: 53°F |
| Mostly cloudy with a chance of showers. Slight chance of a thunderstorm. Windy at times. |
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| Saturday, June 13th, 2026 |
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Overnight |
Temperature: 44°F |
| Cloudy with clear periods with a chance of showers. Windy at times. |
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Morning |
Temperature: 45°F |
| A mix of cloud and sun. Windy at times. |
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Afternoon |
Temperature: 54°F |
| Mostly cloudy with a slight chance of showers. Windy. |
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Evening |
Temperature: 50°F |
| A mix of cloudy and clear skies with a slight chance of showers. Windy at times. |
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| Sunday, June 14th, 2026 |
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Overnight |
Temperature: 44°F |
| Mostly clear. |
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Morning |
Temperature: 48°F |
| Mostly sunny. |
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Afternoon |
Temperature: 62°F |
| Sunny with cloudy periods. |
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Evening |
Temperature: 60°F |
| Mostly clear. |
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| Monday, June 15th, 2026 |
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Overnight |
Temperature: 49°F |
| Clear. |
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Morning |
Temperature: 56°F |
| Mostly sunny. |
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Afternoon |
Temperature: 72°F |
| A mix of cloud and sun. Windy at times. |
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Evening |
Temperature: 67°F |
| A mix of cloudy and clear skies. Slight chance of a thunderstorm. Windy at times. |
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| Tuesday, June 16th, 2026 |
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Overnight |
Temperature: 61°F |
| Clear with cloudy periods. Windy at times. |
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Morning |
Temperature: 65°F |
| Mostly sunny. Windy at times. |
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Afternoon |
Temperature: 78°F |
| Mostly sunny. Wind 20 to 30 mph. |
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Evening |
Temperature: 74°F |
| Clear. Slight chance of a thunderstorm. Wind 20 to 30 mph. |
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| Wednesday, June 17th, 2026 |
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Overnight |
Temperature: 60°F |
| Clear with cloudy periods. Wind 20 to 30 mph. |
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Morning |
Temperature: 53°F |
| Mostly sunny. Wind 20 to 30 mph. |
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Afternoon |
Temperature: 65°F |
| Sunny. Wind 20 to 30 mph. |
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Evening |
Temperature: 62°F |
| Clear. Windy at times. |
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| Thursday, June 18th, 2026 |
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Overnight |
Temperature: 49°F |
| Clear. |
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Morning |
Temperature: 55°F |
| Sunny. |
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Afternoon |
Temperature: 73°F |
| Sunny. Windy. |
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Evening |
Temperature: 71°F |
| Clear. Windy at times. |
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| Friday, June 19th, 2026 |
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Overnight |
Temperature: 57°F |
| Mostly clear. |
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Morning |
Temperature: 62°F |
| Mostly sunny. Windy at times. |
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Afternoon |
Temperature: 73°F |
| Sunny. Windy. |
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Evening |
Temperature: 62°F |
| Mostly cloudy. Windy. |
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| Saturday, June 20th, 2026 |
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Overnight |
Temperature: 46°F |
| Clear. Windy. |
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Morning |
Temperature: 48°F |
| A mix of sun and cloud. Windy. |
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Afternoon |
Temperature: 57°F |
| A mix of cloud and sun. Windy at times. |
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Evening |
Temperature: 56°F |
| Clear with cloudy periods. Windy at times. |
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