| Thu Jun 20 | Fri Jun 21 | Sat Jun 22 | Sun Jun 23 | |
| Tmin 18-06 |
6°C | 11°C | 12°C | 12°C |
| Tmax 06-18 |
18°C | 16°C | 15°C | 16°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 Weather Stations - Harlech | Distance |
| Capel Curig | 35.6 km |
| Bala | 38.6 km |
| Aberdaron | 41.5 km |
| Lake Vyrnwy | 44.1 km |
| Trawscoed | 51.3 km |
| Raf Mona | 52.8 km |
| Valley | 57.3 km |
| Rhyl | 64.9 km |
| Aberporth | 80.2 km |
| Sennybridge | 88.4 km |