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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. The area gets 228 sunny days per year, above the national average. 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) |
| Sunny Days | 228 days/yr |
Geography
| Elevation | 102 ft (31 m) |
| Area | 5.8 sq mi (15.0 km²) |
| Population Density | 578/sq mi |
| Coordinates | 49.9289°N, 2.1962°W |
| 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").