Temperature
Cold by day, cold at night.
Cold days.
Cold by day, cold at night.
Rain is frequent. About 17 wet days, the highest monthly average.
Sunshine is scarce under mostly cloudy skies.
Humidity is rarely noticeable in the cool air.
In December, afternoons feel about 37° and nights feel near 34°.
Mostly cloudy skies this month.
Breezy December days can feel brisker in open spots.
December late afternoons are around 45°F, and early evening stays near 44°F.
| Month | High°F | Low°F | Rainin | Wet days | Sunh | Humidity% | Sea°F |
|---|---|---|---|---|---|---|---|
| Jan | 46 | 39 | 3.6 | 16 | 1.8 | 84 | 48 |
| Feb | 47 | 39 | 3.1 | 14 | 3.0 | 83 | 46 |
| Mar | 49 | 40 | 2.9 | 14 | 4.0 | 81 | 46 |
| Apr | 54 | 42 | 2.8 | 14 | 5.9 | 78 | 48 |
| May | 59 | 47 | 2.9 | 15 | 7.2 | 78 | 51 |
| Jun | 63 | 52 | 3.1 | 14 | 7.0 | 80 | 55 |
| Jul | 66 | 55 | 3.1 | 16 | 6.4 | 81 | 58 |
| Aug | 65 | 55 | 3.2 | 16 | 6.0 | 83 | 60 |
| Sep | 63 | 52 | 3.4 | 14 | 4.7 | 83 | 60 |
| Oct | 57 | 48 | 4.1 | 16 | 3.3 | 84 | 58 |
| Nov | 51 | 44 | 4.3 | 17 | 2.2 | 84 | 54 |
| Dec | 47 | 40 | 4.3 | 17 | 1.6 | 85 | 51 |
Similar climates
Want a side-by-side climate view? Compare Anglesey with Aberystwyth.
Typical monthly values are based on long-term climate records. Useful for planning, not a forecast. Check the weather before you travel.
Sunshine: source type is not yet identified at metric level.
Local microclimates can vary by beach, neighborhood, trail, or elevation.
Last updated: Aug 16, 2026
Data & methodology