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Weather & Climate in Jollain-Merlin, Belgium
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Jollain-Merlin 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 213 sunny days per year. Annual precipitation totals 40.0 inches. The area receives 4.0 inches of snow annually. The city sits at an elevation of 85 feet.
Temperature
42°F Jan (5°C)
65°F Jul (19°C)
| Annual Average | 53.7°F |
| 1% below US avg | |
| January Average | 42°F (5°C) |
| July Average | 65°F (19°C) |
| Sunny Days | 213 days/yr |
Geography
| Elevation | 85 ft (26 m) |
| Area | 2.4 sq mi (6.1 km²) |
| Population Density | 249/sq mi |
| Coordinates | 50.5391°N, 3.4040°W |
| Timezone | Europe/Brussels |
Precipitation & Snow
Air Quality
Earthquake History
38 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.3.
| Jun 20, 1995 | 1 km N of Ghlin, Belgium | M4.3 | 36 km | 20 km |
| Aug 29, 1992 | 4 km SSE of Cousolre, France | M4.1 | 66 km | 18 km |
| Dec 14, 1991 | 3 km SSE of Longfossé, France | M4.0 | 112 km | 10 km |
| Aug 26, 1992 | 2 km WSW of Rance, Belgium | M3.9 | 75 km | 10 km |
| Jul 13, 2008 | 0 km ESE of Court-Saint-Étienne, Belgium | M3.8 | 83 km | 4 km |
| Apr 19, 1990 | 0 km SSW of Flémalle-Haute, Belgium | M3.6 | 144 km | 10 km |
| Jan 27, 1992 | 6 km SSE of Longfossé, France | M3.5 | 110 km | 10 km |
| Jul 20, 1994 | 2 km N of Rousies, France | M3.5 | 50 km | 5 km |
| Oct 25, 1998 | 6 km NNE of Montdidier, France | M3.2 | 110 km | 7 km |
| Jul 14, 2008 | 1 km SW of Boussu, Belgium | M3.2 | 30 km | 4 km |
| Jun 1, 2005 | 3 km N of Grandvilliers, France | M3.1 | 140 km | 10 km |
| May 10, 1990 | 1 km W of Modave, Belgium | M3.1 | 132 km | 11 km |
| Jul 2, 2001 | 3 km NNE of Oostduinkerke, Belgium | M3.1 | 83 km | 5 km |
| Feb 27, 2005 | 1 km NW of Libercourt, France | M3.1 | 29 km | 4 km |
| May 4, 1990 | 0 km NE of Coquelles, France | M3.1 | 121 km | 10 km |
| Jul 20, 1994 | 1 km NE of Quévy-le-Petit, Belgium | M3.1 | 43 km | 5 km |
| Nov 25, 1998 | 26 km N of Grand-Fort-Philippe, France | M3.0 | 120 km | 10 km |
| Jul 23, 1992 | 3 km ENE of Sivry, Belgium | M3.0 | 71 km | 10 km |
| Aug 23, 1994 | 2 km E of Dikkebus, Belgium | M2.9 | 49 km | 10 km |
| Mar 9, 1994 | 1 km NW of Houthulst, Belgium | M2.8 | 60 km | 5 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
1 tsunami 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 | — | 137 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (5°C) | 2.4 in | |
| February | 39°F (4°C) | 1.8 in | Coldest, Driest |
| March | 44°F (6°C) | 2.5 in | |
| April | 48°F (9°C) | 1.9 in | |
| May | 56°F (13°C) | 2.4 in | |
| June | 60°F (16°C) | 2.8 in | |
| July | 65°F (19°C) | 2.6 in | Warmest |
| August | 64°F (18°C) | 2.2 in | |
| September | 59°F (15°C) | 2.4 in | |
| October | 52°F (11°C) | 2.8 in | |
| November | 44°F (6°C) | 3.0 in | Wettest |
| December | 40°F (4°C) | 2.7 in |
Jollain-Merlin has a seasonal temperature swing of 27°F / from 39°F in February to 65°F in July. Total annual precipitation is 29.3 inches, with November being the wettest month (3.0") and February the driest (1.8").