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Weather & Climate in Treffiagat, France
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Treffiagat experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 45°F in January while summers reach 64°F in July / relatively mild seasonal variation. The area gets 264 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 39.7 inches. The city sits at an elevation of 49 feet.
Temperature
45°F Jan (7°C)
64°F Jul (18°C)
| Annual Average | 53.9°F |
| 0% below US avg | |
| January Average | 45°F (7°C) |
| July Average | 64°F (18°C) |
| Sunny Days | 264 days/yr |
Geography
| Elevation | 49 ft (15 m) |
| Area | 3.1 sq mi (8.1 km²) |
| Population Density | 759/sq mi |
| Coordinates | 47.8035°N, 4.2635°W |
| Timezone | Europe/Paris |
Precipitation & Snow
Air Quality
Earthquake History
155 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.
| Mar 13, 1993 | 1 km WSW of Pénestin, France | M4.6 | 138 km | 10 km |
| Nov 21, 2013 | 1 km WSW of Plescop, France | M4.5 | 108 km | 4 km |
| Sep 30, 2002 | 3 km W of Languidic, France | M4.2 | 79 km | 10 km |
| Sep 30, 2002 | 1 km E of Languidic, France | M4.1 | 84 km | 4 km |
| Oct 11, 1995 | 1 km SSE of Querrien, France | M3.9 | 57 km | 10 km |
| Apr 23, 2002 | 1 km ESE of Melgven, France | M3.8 | 36 km | 6 km |
| Jul 18, 2004 | 6 km WSW of Groix, France | M3.8 | 59 km | 16 km |
| Mar 28, 2002 | 36 km WSW of Le Palais, France | M3.8 | 79 km | 15 km |
| Feb 19, 2020 | 3 km ESE of Brest, France | M3.7 | 65 km | 10 km |
| Aug 22, 1998 | 38 km SSE of Plobannalec-Lesconil, France | M3.6 | 39 km | 19 km |
| May 3, 1999 | 1 km SE of Gouesnach, France | M3.5 | 16 km | 15 km |
| Dec 11, 2013 | 6 km WSW of Le Faou, France | M3.5 | 52 km | 2 km |
| Apr 22, 1995 | 6 km E of Binic, France | M3.5 | 144 km | 10 km |
| Aug 24, 1996 | 59 km SSW of Guilvinec, France | M3.5 | 61 km | 10 km |
| May 14, 1994 | 0 km SE of Riec-sur-Belon, France | M3.5 | 43 km | 10 km |
| Mar 21, 2003 | 10 km SE of Groix, France | M3.4 | 72 km | 18 km |
| May 2, 1990 | 2 km SSE of Arzon, France | M3.4 | 107 km | 10 km |
| Feb 9, 2005 | 2 km N of Plouay, France | M3.4 | 71 km | 10 km |
| May 7, 2000 | 65 km S of Guilvinec, France | M3.4 | 66 km | 14 km |
| Sep 30, 2002 | 5 km SW of Baud, France | M3.3 | 88 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 45°F (7°C) | 4.9 in | Coldest |
| February | 45°F (7°C) | 3.8 in | |
| March | 48°F (9°C) | 3.4 in | |
| April | 51°F (10°C) | 2.4 in | |
| May | 56°F (13°C) | 2.6 in | |
| June | 60°F (16°C) | 2.0 in | |
| July | 64°F (18°C) | 1.7 in | Driest |
| August | 64°F (18°C) | 2.2 in | Warmest |
| September | 61°F (16°C) | 3.0 in | |
| October | 56°F (13°C) | 3.6 in | |
| November | 50°F (10°C) | 5.2 in | Wettest |
| December | 47°F (8°C) | 4.8 in |
Treffiagat has a seasonal temperature swing of 19°F / from 45°F in January to 64°F in August. Total annual precipitation is 39.7 inches, with November being the wettest month (5.2") and July the driest (1.7").