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Weather & Climate in Cemaes Bay, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Cemaes Bay experiences four distinct seasons with an average annual temperature of 50°F (10°C). Winters average 42°F in January while summers reach 60°F in July / relatively mild seasonal variation. The area gets 272 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 35.5 inches. The city sits at an elevation of 39 feet.
Temperature
42°F Jan (5°C)
60°F Jul (15°C)
| Annual Average | 49.9°F |
| 8% below US avg | |
| January Average | 42°F (5°C) |
| July Average | 60°F (15°C) |
| Sunny Days | 272 days/yr |
Geography
| Elevation | 39 ft (12 m) |
| Area | 11.5 sq mi (29.8 km²) |
| Population Density | 103/sq mi |
| Coordinates | 53.4121°N, 4.4519°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
21 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.3.
| Oct 21, 2002 | 1 km ESE of Manchester, United Kingdom | M4.3 | 148 km | 5 km |
| May 29, 2013 | 14 km WSW of Nefyn, United Kingdom | M3.8 | 62 km | 10 km |
| Mar 7, 1996 | 3 km SW of Clive, United Kingdom | M3.8 | 132 km | 10 km |
| Feb 14, 2005 | 2 km SW of Conwy, United Kingdom | M3.8 | 43 km | 5 km |
| Apr 28, 2009 | 3 km WSW of Flookburgh, United Kingdom | M3.7 | 126 km | 9 km |
| May 30, 2022 | 2 km ESE of Prees, United Kingdom | M3.6 | 135 km | 10 km |
| Jul 29, 1992 | 8 km WNW of Caernarfon, United Kingdom | M3.5 | 28 km | 10 km |
| Mar 17, 1994 | 5 km WNW of Newtown, United Kingdom | M3.5 | 122 km | 10 km |
| Jun 16, 1991 | 11 km WSW of Knighton, United Kingdom | M3.3 | 148 km | 10 km |
| Sep 1, 1999 | 4 km SSW of Llanfairfechan, United Kingdom | M3.3 | 36 km | 10 km |
| Feb 10, 1994 | 2 km NNE of Tregarth, United Kingdom | M3.3 | 33 km | 10 km |
| Aug 25, 2013 | 23 km W of Cleveleys, United Kingdom | M3.2 | 87 km | 8 km |
| Oct 29, 2002 | 2 km N of Longsight, United Kingdom | M3.1 | 150 km | 5 km |
| Jun 26, 1993 | 5 km WSW of High Bentham, United Kingdom | M3.0 | 144 km | 10 km |
| May 26, 2015 | 6 km WSW of Caernarfon, United Kingdom | M3.0 | 34 km | 9 km |
| Oct 22, 2002 | 1 km WNW of Longsight, United Kingdom | M2.9 | 148 km | 5 km |
| Jun 26, 2013 | 14 km WSW of Nefyn, United Kingdom | M2.8 | 62 km | 8 km |
| Oct 24, 2002 | 2 km N of Longsight, United Kingdom | M2.8 | 150 km | 5 km |
| Oct 16, 1998 | 1 km WSW of Y Felinheli, United Kingdom | M2.7 | 30 km | 12 km |
| Oct 25, 2002 | 1 km ENE of Manchester, United Kingdom | M2.5 | 149 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (5°C) | 3.5 in | |
| February | 42°F (5°C) | 2.6 in | Coldest |
| March | 44°F (7°C) | 2.9 in | |
| April | 47°F (8°C) | 2.2 in | |
| May | 52°F (11°C) | 1.9 in | Driest |
| June | 56°F (13°C) | 2.1 in | |
| July | 60°F (15°C) | 2.2 in | |
| August | 60°F (15°C) | 2.9 in | Warmest |
| September | 56°F (14°C) | 3.2 in | |
| October | 52°F (11°C) | 3.9 in | |
| November | 47°F (8°C) | 4.3 in | Wettest |
| December | 44°F (6°C) | 3.9 in |
Cemaes Bay has a seasonal temperature swing of 18°F / from 42°F in February to 60°F in August. Total annual precipitation is 35.5 inches, with November being the wettest month (4.3") and May the driest (1.9").