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 Lewistown Weather Forecast Summary |
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Today
May 2nd
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Sunday
May 3rd
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Monday
May 4th
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Tuesday
May 5th
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Wednesday
May 6th
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Mostly Sunny |
Mostly Sunny |
Mostly Cloudy |
Mix of Cloud and Sun |
Mix of Sun and Cloud |
63°F
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68°F
45°F |
52°F
38°F |
45°F
29°F |
57°F
30°F |
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| Lewistown Detailed Weather Forecast |
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| Saturday, May 2nd, 2026 |
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Afternoon |
Temperature: 61°F |
| A mix of cloud and sun. Slight chance of a thunderstorm. Windy at times. |
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Evening |
Temperature: 55°F |
| A mix of clear and cloudy skies. Slight chance of a thunderstorm. Windy at times. |
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| Sunday, May 3rd, 2026 |
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Overnight |
Temperature: 48°F |
| Cloudy with clear periods. |
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Morning |
Temperature: 51°F |
| Sunny. |
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Afternoon |
Temperature: 66°F |
| Sunny. Windy at times. |
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Evening |
Temperature: 61°F |
| Mostly clear. Windy at times. |
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| Monday, May 4th, 2026 |
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Overnight |
Temperature: 47°F |
| Clear with cloudy periods. Windy. |
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Morning |
Temperature: 40°F |
| Cloudy. Windy. |
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Afternoon |
Temperature: 46°F |
| Cloudy. Windy. |
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Evening |
Temperature: 45°F |
| Mostly cloudy. Windy. |
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| Tuesday, May 5th, 2026 |
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Overnight |
Temperature: 34°F |
| Clear with cloudy periods. |
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Morning |
Temperature: 34°F |
| A mix of sun and cloud. Windy at times. |
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Afternoon |
Temperature: 43°F |
| Mostly cloudy with a slight chance of showers. Windy at times. |
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Evening |
Temperature: 40°F |
| A mix of cloudy and clear skies with a slight chance of showers. Showers possibly mixed with wet flurries. Windy at times. |
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| Wednesday, May 6th, 2026 |
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Overnight |
Temperature: 33°F |
| A mix of cloudy and clear skies. |
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Morning |
Temperature: 37°F |
| Sunny with cloudy periods. |
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Afternoon |
Temperature: 53°F |
| A mix of cloud and sun. |
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Evening |
Temperature: 51°F |
| Clear with cloudy periods. |
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| Thursday, May 7th, 2026 |
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Overnight |
Temperature: 46°F |
| Mostly cloudy with a chance of showers. Windy at times. |
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Morning |
Temperature: 50°F |
| A mix of cloud and sun with a chance of showers. Windy at times. |
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Afternoon |
Temperature: 56°F |
| Cloudy with a chance of showers. Windy at times. |
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Evening |
Temperature: 53°F |
| Mostly cloudy with a slight chance of showers. |
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| Friday, May 8th, 2026 |
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Overnight |
Temperature: 49°F |
| Mostly cloudy. |
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Morning |
Temperature: 52°F |
| Mostly cloudy. |
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Afternoon |
Temperature: 59°F |
| Cloudy with a chance of showers. Windy at times. |
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Evening |
Temperature: 53°F |
| Mostly cloudy with a slight chance of showers. Windy at times. |
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| Saturday, May 9th, 2026 |
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Overnight |
Temperature: 47°F |
| Mostly cloudy. |
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Morning |
Temperature: 47°F |
| A mix of sun and cloud. |
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Afternoon |
Temperature: 55°F |
| Cloudy with sunny periods with a slight chance of showers. Windy at times. |
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Evening |
Temperature: 53°F |
| A mix of cloudy and clear skies. |
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| Sunday, May 10th, 2026 |
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Overnight |
Temperature: 44°F |
| Mostly clear. |
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Morning |
Temperature: 48°F |
| A mix of sun and cloud. |
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Afternoon |
Temperature: 62°F |
| A mix of sun and cloud. |
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Evening |
Temperature: 60°F |
| A mix of clear and cloudy skies. |
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