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Weather & Climate in Port Saint Mary, Isle of Man
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Port Saint Mary experiences four distinct seasons with an average annual temperature of 48°F (9°C). Winters average 45°F in January while summers reach 58°F in July / relatively mild seasonal variation. The area gets 226 sunny days per year, above the national average. Annual precipitation totals 54.9 inches (wetter than the 38-inch national average). The area receives 7.9 inches of snow annually. The city sits at an elevation of 33 feet.
Temperature
45°F Jan (7°C)
58°F Jul (14°C)
| Annual Average | 48.3°F |
| 11% below US avg | |
| January Average | 45°F (7°C) |
| July Average | 58°F (14°C) |
| Sunny Days | 226 days/yr |
Geography
| Elevation | 33 ft (10 m) |
| Area | 0.9 sq mi (2.3 km²) |
| Population Density | 2,199/sq mi |
| Coordinates | 54.0741°N, 4.7386°W |
| Timezone | Europe/Isle_of_Man |
Precipitation & Snow
Air Quality
Earthquake History
14 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.8.
| May 29, 2013 | 14 km WSW of Nefyn, United Kingdom | M3.8 | 132 km | 10 km |
| Feb 14, 2005 | 2 km SW of Conwy, United Kingdom | M3.8 | 107 km | 5 km |
| Apr 28, 2009 | 3 km WSW of Flookburgh, United Kingdom | M3.7 | 113 km | 9 km |
| Jul 29, 1992 | 8 km WNW of Caernarfon, United Kingdom | M3.5 | 104 km | 10 km |
| Feb 10, 1994 | 2 km NNE of Tregarth, United Kingdom | M3.3 | 105 km | 10 km |
| Sep 1, 1999 | 4 km SSW of Llanfairfechan, United Kingdom | M3.3 | 106 km | 10 km |
| Aug 25, 2013 | 23 km W of Cleveleys, United Kingdom | M3.2 | 90 km | 8 km |
| May 26, 2015 | 6 km WSW of Caernarfon, United Kingdom | M3.0 | 110 km | 9 km |
| Jun 26, 1993 | 5 km WSW of High Bentham, United Kingdom | M3.0 | 140 km | 10 km |
| May 13, 2001 | 3 km W of Locharbriggs, United Kingdom | M2.9 | 135 km | 12 km |
| Jun 26, 2013 | 14 km WSW of Nefyn, United Kingdom | M2.8 | 133 km | 8 km |
| Oct 16, 1998 | 1 km WSW of Y Felinheli, United Kingdom | M2.7 | 105 km | 12 km |
| Apr 24, 2000 | 12 km NNW of Penrith, United Kingdom | M2.6 | 147 km | 14 km |
| May 28, 2008 | 12 km WNW of Penrith, United Kingdom | M2.5 | 135 km | 6 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 45°F (7°C) | 3.8 in | |
| February | 40°F (5°C) | 2.8 in | Coldest |
| March | 42°F (6°C) | 2.9 in | |
| April | 45°F (7°C) | 2.4 in | |
| May | 50°F (10°C) | 2.2 in | Driest |
| June | 54°F (12°C) | 2.3 in | |
| July | 58°F (14°C) | 2.3 in | Warmest |
| August | 58°F (14°C) | 3.0 in | |
| September | 54°F (12°C) | 3.2 in | |
| October | 50°F (10°C) | 4.0 in | Wettest |
| November | 45°F (7°C) | 4.0 in | |
| December | 42°F (6°C) | 3.9 in |
Port Saint Mary has a seasonal temperature swing of 18°F / from 40°F in February to 58°F in July. Total annual precipitation is 36.8 inches, with October being the wettest month (4.0") and May the driest (2.2").