| Mon May 20 | Tue May 21 | Wed May 22 | Thu May 23 | |
| Tmin 18-06 |
6°C | 8°C | 5°C | 5°C |
| Tmax 06-18 |
17°C | 15°C | 13°C | 10°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 - Machynlleth | Distance |
| Lake Vyrnwy | 26.5 km |
| Barmouth | 28.0 km |
| Aberystwyth | 28.8 km |
| Forecast: Machynlleth Region Scattered clouds and sunny spells; both will be present in the coming days. Rain is not expected this day. The daily high falls from 16 degrees on Monday to 12 degrees on Wednesday. On Wednesday a fresh wind from the west. |