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 Lewistown Weather Forecast Summary |
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Today
Feb 13th
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Saturday
Feb 14th
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Sunday
Feb 15th
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Monday
Feb 16th
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Tuesday
Feb 17th
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Mostly Sunny |
Cloudy |
Cloudy |
Cloudy |
Cloudy |
32°F
|
38°F
23°F |
39°F
28°F |
43°F
30°F |
48°F
29°F |
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| Lewistown Detailed Weather Forecast |
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| Saturday, February 14th, 2026 |
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Overnight |
Temperature: 23°F |
| Cloudy. |
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Morning |
Temperature: 36°F |
| Cloudy. |
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Afternoon |
Temperature: 35°F |
| Cloudy. |
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Evening |
Temperature: 31°F |
| Cloudy. |
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| Sunday, February 15th, 2026 |
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Overnight |
Temperature: 28°F |
| Cloudy. |
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Morning |
Temperature: 37°F |
| Cloudy. |
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Afternoon |
Temperature: 35°F |
| Cloudy. |
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Evening |
Temperature: 31°F |
| Cloudy. |
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| Monday, February 16th, 2026 |
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Overnight |
Temperature: 31°F |
| Cloudy. |
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Morning |
Temperature: 39°F |
| Cloudy. |
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Afternoon |
Temperature: 39°F |
| Cloudy. |
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Evening |
Temperature: 30°F |
| Clear with cloudy periods. |
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| Tuesday, February 17th, 2026 |
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Overnight |
Temperature: 29°F |
| Clear with cloudy periods. |
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Morning |
Temperature: 44°F |
| Cloudy. |
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Afternoon |
Temperature: 44°F |
| Cloudy. |
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Evening |
Temperature: 37°F |
| Cloudy. |
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| Wednesday, February 18th, 2026 |
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Overnight |
Temperature: 37°F |
| Cloudy with a chance of showers. Showers possibly mixed with wet flurries. |
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Morning |
Temperature: 41°F |
| Cloudy with a few showers. Showers possibly mixed with wet flurries. |
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Afternoon |
Temperature: 45°F |
| Cloudy. Windy at times. |
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Evening |
Temperature: 41°F |
| Mostly clear. |
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| Thursday, February 19th, 2026 |
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Overnight |
Temperature: 49°F |
| Clear with cloudy periods. Windy at times. |
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Morning |
Temperature: 46°F |
| A mix of cloud and sun. Windy. |
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Afternoon |
Temperature: 40°F |
| Cloudy. Windy at times. |
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Evening |
Temperature: 34°F |
| Cloudy. |
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| Friday, February 20th, 2026 |
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Overnight |
Temperature: 28°F |
| Cloudy. |
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Morning |
Temperature: 33°F |
| Cloudy with a chance of flurries or showers. Risk of freezing rain. Windy at times. |
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Afternoon |
Temperature: 34°F |
| Cloudy with a few flurries or showers. Risk of freezing rain. |
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Evening |
Temperature: 36°F |
| Cloudy. Windy at times. |
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| Saturday, February 21st, 2026 |
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Overnight |
Temperature: 27°F |
| A mix of cloudy and clear skies. Windy at times. |
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Morning |
Temperature: 29°F |
| A mix of cloud and sun. Windy at times. |
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Afternoon |
Temperature: 32°F |
| Sunny with cloudy periods. |
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Evening |
Temperature: 24°F |
| Mostly clear. |
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