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Weather & Climate in Saint-Jean-de-Moirans, France
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Saint-Jean-de-Moirans experiences four distinct seasons with an average annual temperature of 54°F (12°C). Winters average 38°F in January while summers reach 71°F in July. The area gets 269 sunny days per year, well above the U.S. average of 205 / making it one of the sunnier locations in the country. Annual precipitation totals 45.4 inches. The area receives 7.8 inches of snow annually. The city sits at an elevation of 830 feet.
Temperature
38°F Jan (3°C)
71°F Jul (22°C)
| Annual Average | 54.1°F |
| 0% below US avg | |
| January Average | 38°F (3°C) |
| July Average | 71°F (22°C) |
| Sunny Days | 269 days/yr |
Geography
| Elevation | 830 ft (253 m) |
| Area | 8.5 sq mi (21.9 km²) |
| Population Density | 343/sq mi |
| Coordinates | 45.3451°N, 5.5854°W |
| Timezone | Europe/Paris |
Precipitation & Snow
Air Quality
Earthquake History
1,111 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M4.8.
| Oct 31, 1997 | 12 km SE of Seyne-les-Alpes, France | M4.8 | 138 km | 10 km |
| Apr 7, 2014 | 7 km SE of Guillestre, France | M4.8 | 121 km | 8 km |
| Feb 11, 1991 | 5 km ESE of Briançon, France | M4.6 | 102 km | 14 km |
| Dec 14, 1994 | 7 km SSE of Amancy, France | M4.5 | 95 km | 10 km |
| Mar 12, 2022 | 3 km S of Faverges, France | M4.5 | 69 km | 3 km |
| Mar 2, 2012 | 8 km NNW of Jausiers, France | M4.5 | 130 km | 10 km |
| Jul 15, 1996 | 3 km NE of Chilly, France | M4.5 | 81 km | 5 km |
| Jul 25, 2011 | 5 km NW of Cantalupa, Italy | M4.4 | 139 km | 25 km |
| Jul 23, 1996 | 4 km W of Choisy, France | M4.4 | 80 km | 10 km |
| Jun 30, 2010 | 3 km NW of Saint-Martin-de-Belleville, France | M4.3 | 70 km | 2 km |
| Aug 3, 2011 | 4 km ESE of Barjac, France | M4.3 | 149 km | 4 km |
| May 14, 2004 | 0 km SSE of Chiusa di San Michele, Italy | M4.2 | 139 km | 10 km |
| Jul 30, 2016 | 0 km SSW of Fleccia-Chianavasso, Italy | M4.2 | 135 km | 11 km |
| Feb 26, 2012 | 13 km ESE of Embrun, France | M4.2 | 123 km | 2 km |
| Jan 11, 1999 | 2 km W of Saint-Paul-de-Varces, France | M4.2 | 30 km | 10 km |
| Feb 27, 2012 | 8 km NNW of Jausiers, France | M4.1 | 129 km | 0 km |
| Apr 11, 1998 | 1 km SW of Oncino, Italy | M4.1 | 146 km | 13 km |
| Feb 18, 1996 | 13 km ESE of Saint-Martin-de-Queyrières, France | M4.1 | 111 km | 5 km |
| Jan 11, 2006 | 1 km S of Saint-Rambert-en-Bugey, France | M4.1 | 66 km | 5 km |
| Jul 14, 2014 | 8 km NNW of Jausiers, France | M4.1 | 129 km | 2 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 | — | — | 148 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 38°F (3°C) | 3.1 in | |
| February | 37°F (3°C) | 3.1 in | |
| March | 43°F (6°C) | 3.4 in | |
| April | 48°F (9°C) | 3.5 in | |
| May | 56°F (14°C) | 4.1 in | |
| June | 62°F (17°C) | 3.8 in | |
| July | 71°F (22°C) | 2.8 in | Warmest, Driest |
| August | 67°F (19°C) | 3.0 in | |
| September | 60°F (15°C) | 4.4 in | Wettest |
| October | 52°F (11°C) | 4.4 in | |
| November | 42°F (5°C) | 4.1 in | |
| December | 37°F (3°C) | 3.4 in | Coldest |
Saint-Jean-de-Moirans has a seasonal temperature swing of 34°F / from 37°F in December to 71°F in July. Total annual precipitation is 42.9 inches, with September being the wettest month (4.4") and July the driest (2.8").