Weather & Climate in Ailly-sur-Somme, France
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Ailly-sur-Somme experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 42°F in January while summers reach 65°F in July. Annual precipitation totals 40.0 inches. The area receives 1.1 inches of snow annually. The city sits at an elevation of 102 feet.
Temperature
42°F Jan (6°C)
65°F Jul (18°C)
| Annual Average | 53.6°F |
| 1% below US avg | |
| January Average | 42°F (6°C) |
| July Average | 65°F (18°C) |
Geography
| Elevation | 102 ft (31 m) |
| Area | 5.8 sq mi (15.0 km²) |
| Population Density | 517/sq mi |
| Coordinates | 49.9289°N, 2.1962°E |
| Timezone | Europe/Paris |
Precipitation & Snow
Air Quality
Earthquake History
35 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.6.
| Oct 6, 1999 | 34 km NNW of Fécamp, France | M4.6 | 139 km | 1 km |
| Jun 20, 1995 | 1 km N of Ghlin, Belgium | M4.3 | 136 km | 20 km |
| Aug 29, 1992 | 4 km SSE of Cousolre, France | M4.1 | 144 km | 18 km |
| Dec 14, 1991 | 3 km SSE of Longfossé, France | M4.0 | 82 km | 10 km |
| Aug 26, 1992 | 2 km WSW of Rance, Belgium | M3.9 | 149 km | 10 km |
| Jan 27, 1998 | 27 km W of Le Touquet-Paris-Plage, France | M3.8 | 95 km | 2 km |
| Jul 20, 1994 | 2 km N of Rousies, France | M3.5 | 135 km | 5 km |
| Jan 27, 1992 | 6 km SSE of Longfossé, France | M3.5 | 79 km | 10 km |
| Jun 16, 1998 | 18 km NNW of Yport, France | M3.3 | 145 km | 5 km |
| Feb 13, 1997 | 26 km W of Le Touquet-Paris-Plage, France | M3.2 | 96 km | 5 km |
| Oct 25, 1998 | 6 km NNE of Montdidier, France | M3.2 | 39 km | 7 km |
| Jul 14, 2008 | 1 km SW of Boussu, Belgium | M3.2 | 126 km | 4 km |
| Jul 20, 1994 | 1 km NE of Quévy-le-Petit, Belgium | M3.1 | 135 km | 5 km |
| Jul 2, 2001 | 3 km NNE of Oostduinkerke, Belgium | M3.1 | 140 km | 5 km |
| Jun 1, 2005 | 3 km N of Grandvilliers, France | M3.1 | 31 km | 10 km |
| May 4, 1990 | 0 km NE of Coquelles, France | M3.1 | 116 km | 10 km |
| Feb 27, 2005 | 1 km NW of Libercourt, France | M3.1 | 85 km | 4 km |
| Nov 25, 1998 | 26 km N of Grand-Fort-Philippe, France | M3.0 | 145 km | 10 km |
| May 1, 1997 | 21 km W of Fort-Mahon-Plage, France | M3.0 | 81 km | 5 km |
| Jul 23, 1992 | 3 km ENE of Sivry, Belgium | M3.0 | 148 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990-2025). Sorted by magnitude.
Tsunami History
2 tsunamis recorded within 500 km. Highest wave on record: 6.0 m (20 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1858 | NORTH SEA | Unknown | 6.0 m | - | 129 km |
| 1911 | FOLKSTONE, ENGLAND | Meteorological | 0.9 m | - | 147 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (6°C) | 2.2 in | |
| February | 39°F (4°C) | 1.8 in | Coldest, Driest |
| March | 44°F (7°C) | 1.9 in | |
| April | 48°F (9°C) | 1.9 in | |
| May | 55°F (13°C) | 2.2 in | |
| June | 59°F (15°C) | 2.5 in | |
| July | 65°F (18°C) | 2.1 in | Warmest |
| August | 64°F (18°C) | 2.1 in | |
| September | 59°F (15°C) | 2.5 in | |
| October | 52°F (11°C) | 2.5 in | |
| November | 44°F (7°C) | 2.5 in | |
| December | 40°F (5°C) | 2.6 in | Wettest |
Ailly-sur-Somme has a seasonal temperature swing of 26°F / from 39°F in February to 65°F in July. Total annual precipitation is 26.8 inches, with December being the wettest month (2.6") and February the driest (1.8").