All Countries
Weather & Climate in Isles of Scilly, United Kingdom
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Isles of Scilly experiences four distinct seasons with an average annual temperature of 53°F (12°C). Winters average 48°F in January while summers reach 61°F in July / relatively mild seasonal variation. The area gets 263 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 40.3 inches. The city sits at an elevation of 135 feet.
Temperature
48°F Jan (9°C)
61°F Jul (16°C)
| Annual Average | 53.2°F |
| 1% below US avg | |
| January Average | 48°F (9°C) |
| July Average | 61°F (16°C) |
| Sunny Days | 263 days/yr |
Geography
| Elevation | 135 ft (41 m) |
| Area | 6.3 sq mi (16.3 km²) |
| Population Density | 353/sq mi |
| Coordinates | 49.9252°N, 6.2989°W |
| Timezone | Europe/London |
Precipitation & Snow
Air Quality
Earthquake History
8 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.1.
| Nov 10, 1996 | 19 km S of St Just, United Kingdom | M4.1 | 48 km | 10 km |
| Oct 14, 2002 | 98 km S of Hugh Town, United Kingdom | M3.3 | 100 km | 10 km |
| Jun 29, 1992 | 121 km WSW of Hugh Town, United Kingdom | M3.2 | 123 km | 10 km |
| Jan 19, 2001 | 53 km S of Mullion, United Kingdom | M3.2 | 95 km | 10 km |
| Mar 28, 2005 | 71 km WNW of Porspoder, France | M3.0 | 129 km | 10 km |
| Feb 8, 1998 | 18 km SW of Mullion, United Kingdom | M2.9 | 62 km | 5 km |
| Mar 23, 2008 | 38 km NW of St Just, United Kingdom | M2.8 | 54 km | 6 km |
| Apr 2, 2000 | 33 km S of Mullion, United Kingdom | M2.7 | 83 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 48°F (9°C) | 5.0 in | Wettest |
| February | 47°F (8°C) | 3.9 in | Coldest |
| March | 48°F (9°C) | 3.4 in | |
| April | 49°F (10°C) | 2.2 in | |
| May | 53°F (12°C) | 2.3 in | |
| June | 58°F (14°C) | 2.2 in | |
| July | 61°F (16°C) | 2.0 in | Driest |
| August | 61°F (16°C) | 2.8 in | Warmest |
| September | 59°F (15°C) | 3.4 in | |
| October | 55°F (13°C) | 4.0 in | |
| November | 51°F (11°C) | 4.4 in | |
| December | 49°F (9°C) | 4.8 in |
Isles of Scilly has a seasonal temperature swing of 15°F / from 47°F in February to 61°F in August. Total annual precipitation is 40.3 inches, with January being the wettest month (5.0") and July the driest (2.0").