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| Su 10 | Mo 11 | Tu 12 | We 13 | Th 14 | Fr 15 | Sa 16 | Su 17 | |
| Tmax (°C) | 6 | 9 | 8 | 10 | 8 | 7 | 6 | 6 |
| Tmin (°C) | 4 | 5 | 7 | 4 | 6 | 3 | 2 | 1 |
| 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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| Rain risk | 30 % | 85 % | 55 % | 95 % | 55 % | 35 % | 30 % | 45 % |
| Sunshine hours | ![]() |
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| (hrs) | 0.4 | 0.0 | 0.0 | 0.0 | 0.8 | 1.6 | 1.2 | 0.8 |
| UV index | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 1 |
| Sunrise Sunset |
08:25 16:23 |
08:24 16:25 |
08:23 16:26 |
08:23 16:28 |
08:22 16:29 |
08:21 16:31 |
08:20 16:33 |
08:19 16:34 |
| Wind p.m. | ![]() |
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| Bft | SW 2 | SW 3-4 | E 1 | SW 3 | NW 2 | SE 2 | SW 2-3 | S 2-3 |
| 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 |