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| Su Jan 10 | Mo Jan 11 | Tu Jan 12 | We Jan 13 | |
| Tmin 18-06 |
4°C | 5°C | 6°C | 4°C |
| Tmax 06-18 |
7°C | 9°C | 8°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 |
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| Nearby Forecast Locations - Harlech | Distance |
| Barmouth | 10.3 km |
| Gwynedd | 14.0 km |
| Llyn Trawsfynydd | 16.6 km |
| Porthmadog | 22.4 km |
| Abersoch | 25.9 km |
| Llŷn Peninsula | 34.8 km |
| Bala Lake | 34.9 km |
| Snowdonia | 35.6 km |
| Machynlleth | 37.5 km |
| Caernarfon | 38.4 km |
| Bala | 38.6 km |
| Aberdaron | 41.6 km |
| Lake Vyrnwy | 44.1 km |
| Llangollen | 49.9 km |
| Llyn Brenig | 51.1 km |
| Aberystwyth | 51.3 km |