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Weather & Climate in Saint-Romain-de-Jalionas, France
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Saint-Romain-de-Jalionas enjoys a temperate climate with an average annual temperature of 56°F (13°C). Winters average 40°F in January while summers reach 72°F in July. The area gets 257 sunny days per year, above the national average. Annual precipitation totals 42.6 inches. The area receives 2.7 inches of snow annually. The city sits at an elevation of 669 feet.
Temperature
40°F Jan (4°C)
72°F Jul (22°C)
| Annual Average | 55.5°F |
| 3% above US avg | |
| January Average | 40°F (4°C) |
| July Average | 72°F (22°C) |
| Sunny Days | 257 days/yr |
Geography
| Elevation | 669 ft (204 m) |
| Area | 5.3 sq mi (13.6 km²) |
| Population Density | 562/sq mi |
| Coordinates | 45.7568°N, 5.2174°W |
| Timezone | Europe/Paris |
Precipitation & Snow
Air Quality
Earthquake History
491 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.5.
| Jul 15, 1996 | 3 km NE of Chilly, France | M4.5 | 65 km | 5 km |
| Mar 12, 2022 | 3 km S of Faverges, France | M4.5 | 83 km | 3 km |
| Dec 14, 1994 | 7 km SSE of Amancy, France | M4.5 | 92 km | 10 km |
| May 24, 1995 | 7 km NE of Le Chenit, Switzerland | M4.4 | 130 km | 6 km |
| Jul 23, 1996 | 4 km W of Choisy, France | M4.4 | 67 km | 10 km |
| Jun 30, 2010 | 3 km NW of Saint-Martin-de-Belleville, France | M4.3 | 105 km | 2 km |
| Jan 11, 1999 | 2 km W of Saint-Paul-de-Varces, France | M4.2 | 82 km | 10 km |
| Jan 11, 2006 | 1 km S of Saint-Rambert-en-Bugey, France | M4.1 | 26 km | 5 km |
| May 30, 2001 | 6 km N of Beaufort, France | M4.1 | 106 km | 2 km |
| Feb 14, 1990 | 4 km SE of Saint-Paul-en-Chablais, France | M4.0 | 130 km | 10 km |
| Sep 13, 1999 | 1 km NE of Biol, France | M4.0 | 32 km | 2 km |
| May 25, 2003 | 4 km ESE of Valloire, France | M4.0 | 120 km | 6 km |
| Feb 25, 2001 | 2 km W of Martigny-Ville, Switzerland | M3.9 | 147 km | 3 km |
| May 15, 1997 | 4 km WNW of Modane, France | M3.9 | 125 km | 5 km |
| Oct 1, 2016 | 12 km ESE of Samoëns, France | M3.8 | 132 km | 2 km |
| Dec 28, 1992 | 3 km NE of Villebois, France | M3.8 | 23 km | 12 km |
| Apr 10, 2005 | 5 km ESE of Saint-Martin-de-Belleville, France | M3.8 | 114 km | 3 km |
| Feb 3, 1994 | 6 km WSW of Yenne, France | M3.8 | 37 km | 22 km |
| Sep 4, 1995 | 5 km SE of Gruffy, France | M3.8 | 70 km | 9 km |
| Jan 28, 2004 | 2 km ESE of Châbons, France | M3.8 | 40 km | 3 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km.
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 563 | LAKE GENEVA | Meteorological | — | — | 141 km |
Source: NOAA/NCEI Historical Tsunami Database.
Nearby Volcanoes
1 volcano within 200 km. Closest: Chaine des Puys (174 km).
| Name | Type | Elevation | Last Eruption | Distance |
| Chaine des Puys | Lava dome(s) | 1,464 m (4,803 ft) | -4040 | 174 km |
Source: Smithsonian Institution Global Volcanism Program (GVP).
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 40°F (4°C) | 2.7 in | |
| February | 39°F (4°C) | 2.6 in | Driest |
| March | 45°F (7°C) | 2.8 in | |
| April | 50°F (10°C) | 3.3 in | |
| May | 58°F (15°C) | 3.8 in | |
| June | 64°F (18°C) | 3.4 in | |
| July | 72°F (22°C) | 2.7 in | Warmest |
| August | 68°F (20°C) | 2.8 in | |
| September | 61°F (16°C) | 4.1 in | |
| October | 53°F (12°C) | 4.2 in | Wettest |
| November | 43°F (6°C) | 3.5 in | |
| December | 38°F (4°C) | 2.8 in | Coldest |
Saint-Romain-de-Jalionas has a seasonal temperature swing of 34°F / from 38°F in December to 72°F in July. Total annual precipitation is 38.6 inches, with October being the wettest month (4.2") and February the driest (2.6").