| Mon May 20 | Tue May 21 | Wed May 22 | Thu May 23 | |
| Tmin 18-06 |
9°C | 5°C | 3°C | 5°C |
| Tmax 06-18 |
19°C | 19°C | 9°C | 15°C |
| morning 24-06 |
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| a.m. 06-12 |
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| p.m. 12-18 |
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| evening 18-24 |
| Nearby Forecast Locations - Lewistown | Distance |
| Forecast: Lewistown Region After a fine Tuesday it's becoming some what cloudier. But Thursday some rain is to be expected. From 19 degrees on Tuesday the daily high will go down to 9 degrees on Wednesday. |