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Weather & Climate in Rosny-sur-Seine, France
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Rosny-sur-Seine experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 42°F in January while summers reach 67°F in July. The area gets 231 sunny days per year, above the national average. Annual precipitation totals 34.1 inches. The area receives 1.4 inches of snow annually. The city sits at an elevation of 115 feet.
Temperature
42°F Jan (6°C)
67°F Jul (19°C)
| Annual Average | 54.4°F |
| 1% above US avg | |
| January Average | 42°F (6°C) |
| July Average | 67°F (19°C) |
| Sunny Days | 231 days/yr |
Geography
| Elevation | 115 ft (35 m) |
| Area | 7.5 sq mi (19.3 km²) |
| Population Density | 661/sq mi |
| Coordinates | 48.9981°N, 1.6313°W |
| Timezone | Europe/Paris |
Precipitation & Snow
Air Quality
Earthquake History
22 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M3.7.
| Nov 2, 1997 | 7 km NW of Villers-sur-Mer, France | M3.7 | 130 km | 10 km |
| Aug 1, 2007 | 2 km SSE of Blonville-sur-Mer, France | M3.5 | 121 km | 5 km |
| Jun 16, 1998 | 18 km NNW of Yport, France | M3.3 | 144 km | 5 km |
| Mar 6, 1999 | 2 km W of Vienne-en-Val, France | M3.3 | 138 km | 4 km |
| Oct 19, 2002 | 9 km NW of Trouville-sur-Mer, France | M3.2 | 128 km | 10 km |
| Aug 29, 1992 | 2 km ESE of Radon, France | M3.2 | 123 km | 10 km |
| Oct 25, 1998 | 6 km NNE of Montdidier, France | M3.2 | 105 km | 7 km |
| Jun 1, 2005 | 3 km N of Grandvilliers, France | M3.1 | 81 km | 10 km |
| Feb 22, 1999 | France | M3.1 | 99 km | 4 km |
| Nov 12, 1992 | 5 km NW of Cabourg, France | M2.8 | 136 km | 10 km |
| Aug 20, 1990 | 2 km N of Pont-d'Ouilly, France | M2.8 | 149 km | 22 km |
| Dec 31, 1990 | France | M2.7 | 147 km | 10 km |
| Jan 5, 1994 | 0 km SSE of Saint-Martin-de-Boscherville, France | M2.7 | 69 km | 10 km |
| Jul 24, 2007 | 15 km W of Étretat, France | M2.6 | 144 km | 5 km |
| Nov 3, 2000 | 5 km ESE of Ouzouer-le-Marché, France | M2.6 | 123 km | 5 km |
| Aug 11, 2002 | 3 km SSW of Rogerville, France | M2.6 | 114 km | 4 km |
| Dec 29, 1995 | 4 km WNW of Saint-Pierre-des-Nids, France | M2.6 | 146 km | 5 km |
| Dec 13, 1992 | 1 km SW of La Mailleraye-sur-Seine, France | M2.5 | 83 km | 10 km |
| Jan 12, 1999 | 5 km ESE of Ouzouer-le-Marché, France | M2.5 | 122 km | 18 km |
| Jun 11, 1997 | 4 km NE of Voves, France | M2.5 | 78 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (6°C) | 2.1 in | |
| February | 39°F (4°C) | 2.0 in | Coldest |
| March | 44°F (7°C) | 1.8 in | Driest |
| April | 48°F (9°C) | 1.9 in | |
| May | 55°F (13°C) | 2.1 in | |
| June | 60°F (15°C) | 2.1 in | |
| July | 67°F (19°C) | 2.0 in | Warmest |
| August | 65°F (18°C) | 1.8 in | |
| September | 59°F (15°C) | 1.9 in | |
| October | 52°F (11°C) | 2.6 in | Wettest |
| November | 44°F (7°C) | 2.1 in | |
| December | 40°F (5°C) | 2.4 in |
Rosny-sur-Seine has a seasonal temperature swing of 27°F / from 39°F in February to 67°F in July. Total annual precipitation is 24.7 inches, with October being the wettest month (2.6") and March the driest (1.8").