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Weather & Climate in Romans d'Isonzo, Italy
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Romans d'Isonzo enjoys a temperate climate with an average annual temperature of 57°F (14°C). Winters average 42°F in January while summers reach 74°F in July. The area gets 280 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 76.9 inches (wetter than the 38-inch national average). The area receives 1.4 inches of snow annually. The city sits at an elevation of 75 feet.
Temperature
42°F Jan (6°C)
74°F Jul (24°C)
| Annual Average | 57.3°F |
| 6% above US avg | |
| January Average | 42°F (6°C) |
| July Average | 74°F (24°C) |
| Sunny Days | 280 days/yr |
Geography
| Elevation | 75 ft (23 m) |
| Area | 5.5 sq mi (14.3 km²) |
| Population Density | 563/sq mi |
| Coordinates | 45.8882°N, 13.4419°W |
| Timezone | Europe/Rome |
Precipitation & Snow
Air Quality
Earthquake History
1,006 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M5.6.
| Apr 12, 1998 | 5 km E of Kobarid, Slovenia | M5.6 | 43 km | 10 km |
| Mar 13, 1998 | 4 km NW of Ilirska Bistrica, Slovenia | M5.2 | 67 km | 10 km |
| Jul 12, 2004 | 7 km NE of Kobarid, Slovenia | M5.2 | 48 km | 8 km |
| May 29, 1993 | 1 km SE of ?rnomelj, Slovenia | M5.1 | 142 km | 15 km |
| May 22, 1995 | 6 km NNW of Ilirska Bistrica, Slovenia | M4.9 | 68 km | 27 km |
| Feb 5, 2007 | 11 km ESE of Novi Vinodolski, Croatia | M4.9 | 145 km | 10 km |
| Feb 14, 2002 | 4 km SSW of Moggio di Sotto, Italy | M4.7 | 58 km | 10 km |
| Nov 11, 1990 | 5 km ENE of Cerkno, Slovenia | M4.7 | 55 km | 22 km |
| Feb 16, 2023 | 3 km W of Baška, Croatia | M4.7 | 143 km | 10 km |
| Jun 2, 2002 | 6 km SSE of Pivka, Slovenia | M4.6 | 68 km | 10 km |
| Jan 17, 2003 | 4 km SSE of Punat, Croatia | M4.6 | 138 km | 10 km |
| May 6, 1998 | 6 km NNW of Tolmin, Slovenia | M4.6 | 44 km | 10 km |
| Jun 9, 2012 | 5 km NE of Lamosano, Italy | M4.5 | 85 km | 7 km |
| May 28, 1998 | 3 km WSW of Osoppo, Italy | M4.5 | 50 km | 10 km |
| Oct 5, 1991 | 0 km W of Nimis, Italy | M4.5 | 38 km | 10 km |
| Apr 22, 2014 | 7 km SE of Pivka, Slovenia | M4.5 | 69 km | 5 km |
| Mar 13, 2014 | 9 km E of Ribnica, Slovenia | M4.4 | 110 km | 2 km |
| May 13, 1999 | 2 km NW of Clodig, Italy | M4.4 | 33 km | 10 km |
| Nov 28, 1993 | 3 km WNW of Klana, Croatia | M4.4 | 85 km | 5 km |
| Apr 24, 2005 | 0 km NNW of Ilirska Bistrica, Slovenia | M4.4 | 72 km | 10 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 235.0 m (771 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1963 | VAJONT DAM, VAJONT RIVER | Meteorological | 235.0 m | 2,000 | 96 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 42°F (6°C) | 3.6 in | |
| February | 41°F (5°C) | 2.6 in | Driest |
| March | 47°F (8°C) | 3.6 in | |
| April | 53°F (12°C) | 4.7 in | |
| May | 63°F (17°C) | 4.6 in | |
| June | 69°F (20°C) | 5.4 in | |
| July | 74°F (24°C) | 3.5 in | Warmest |
| August | 73°F (23°C) | 4.3 in | |
| September | 66°F (19°C) | 5.6 in | |
| October | 57°F (14°C) | 5.9 in | Wettest |
| November | 47°F (8°C) | 5.2 in | |
| December | 40°F (4°C) | 4.4 in | Coldest |
Romans d'Isonzo has a seasonal temperature swing of 35°F / from 40°F in December to 74°F in July. Total annual precipitation is 53.2 inches, with October being the wettest month (5.9") and February the driest (2.6").