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Porthmadog (52° 55' N/4° 07' W)
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| Mo 30 | Tu 01 | We 02 | Th 03 | Fr 04 | Sa 05 | Su 06 | Mo 07 | Tu 08 | We 09 | Th 10 | Fr 11 | Sa 12 | Su 13 | |
| Tmin (°C) | 10 | 9 | 9 | 4 | 8 | 12 | 11 | 8 | 7 | 7 | 6 | 4 | 2 | 4 |
| Tmax (°C) | 13 | 15 | 15 | 15 | 15 | 16 | 15 | 12 | 13 | 11 | 11 | 12 | 12 | 12 |
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| a.m. | NE 4 | NE 4 | NE 5 | E 2 | SW 9 | SW 11 | SW 13 | SW 9 | NW 8 | W 10 | W 9 | NE 4 | E 2 | E 2 |
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| W 9 | N 4 | NE 3 | S 3 | S 9 | SW 12 | SW 11 | W 8 | NW 10 | W 10 | W 8 | N 3 | SE 3 | E 5 | |
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| W 6 | NE 3 | NE 3 | S 3 | S 9 | SW 12 | SW 8 | S 6 | W 8 | NW 7 | NW 5 | NE 2 | E 3 | E 9 | |
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| Precipitation (mm) | 22 | 1.8 | 0 | 0 | 5.4 | 15.8 | 27.6 | 10.9 | 10.7 | 12.5 | 8.7 | 0 | 0 | 0 |
| Rain risk | 65 % | 45 % | 35 % | 5 % | 55 % | 75 % | 95 % | 65 % | 55 % | 70 % | 60 % | 30 % | 25 % | 30 % |
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| Sunshine hours (hrs) | 0.0 | 0.6 | 2.3 | 6.3 | 1.1 | 0.6 | 0.6 | 1.1 | 0.6 | 1.1 | 2.2 | 2.7 | 2.2 | 2.1 |
| UV index | 1 | 2 | 3 | 3 | 2 | 2 | 2 | 2 | 2 | 3 | 3 | 3 | 3 | 3 |
| Sunrise Sunset |
07:17 18:55 |
07:19 18:52 |
07:21 18:50 |
07:22 18:48 |
07:24 18:45 |
07:26 18:43 |
07:28 18:40 |
07:29 18:38 |
07:31 18:36 |
07:33 18:33 |
07:35 18:31 |
07:36 18:29 |
07:38 18:27 |
07:40 18:24 |
Last updated: Mo, 30 Sep, 03:47 BST
(Wind Speed in mph)
Wind data for guidance only, actually gusts may be considerably higher than those shown.
