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Weather & Climate in Gromiljak, Bosnia and Herzegovina
Temperature, precipitation, air quality, natural hazards, and monthly weather data.
Gromiljak experiences four distinct seasons with an average annual temperature of 49°F (9°C). Winters average 31°F in January while summers reach 66°F in July. The area gets 264 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 40.0 inches. The area receives 9.4 inches of snow annually. The city sits at an elevation of 1,578 feet.
Temperature
31°F Jan (-0°C)
66°F Jul (19°C)
| Annual Average | 49.0°F |
| 9% below US avg | |
| January Average | 31°F (-0°C) |
| July Average | 66°F (19°C) |
| Sunny Days | 264 days/yr |
Geography
| Elevation | 1,578 ft (481 m) |
| Area | 128.7 sq mi (333.3 km²) |
| Population Density | 50/sq mi |
| Coordinates | 43.9667°N, 18.0550°W |
| Timezone | Europe/Sarajevo |
Precipitation & Snow
Air Quality
Earthquake History
1,033 earthquakes (M2.5+) recorded within 150 km since 1990. Strongest on record: M6.0.
| Sep 5, 1996 | 9 km ESE of Podgora, Croatia | M6.0 | 130 km | 10 km |
| Apr 22, 2022 | 15 km NNE of Ljubinje, Bosnia and Herzegovina | M5.7 | 100 km | 10 km |
| Nov 27, 1990 | 10 km N of Hrvace, Croatia | M5.6 | 115 km | 24 km |
| Sep 17, 1996 | 2 km NW of Podgora, Croatia | M5.5 | 124 km | 10 km |
| Mar 14, 2024 | 22 km ENE of Bileća, Bosnia and Herzegovina | M5.4 | 124 km | 16 km |
| Sep 9, 1996 | 8 km SSE of Podgora, Croatia | M5.3 | 133 km | 10 km |
| Sep 28, 1995 | 0 km WSW of ?iba?a, Croatia | M5.2 | 149 km | 10 km |
| Apr 3, 1990 | 5 km NNW of Grude, Bosnia and Herzegovina | M5.1 | 81 km | 10 km |
| Nov 27, 1990 | 14 km N of Hrvace, Croatia | M5.1 | 114 km | 10 km |
| May 23, 2004 | 3 km WNW of Ko?erin, Bosnia and Herzegovina | M5.0 | 79 km | 10 km |
| Sep 5, 1996 | 2 km SSE of Podgora, Croatia | M4.9 | 128 km | 10 km |
| Jul 31, 1990 | 12 km SE of Tasov?i?i, Bosnia and Herzegovina | M4.9 | 107 km | 10 km |
| Feb 20, 1996 | 11 km W of Kneževo, Bosnia and Herzegovina | M4.9 | 89 km | 10 km |
| Nov 18, 2013 | 10 km ESE of Otok, Croatia | M4.9 | 102 km | 20 km |
| Apr 24, 2022 | 12 km NNE of Ljubinje, Bosnia and Herzegovina | M4.8 | 102 km | 10 km |
| Apr 29, 1991 | 6 km SSW of Mili?i, Bosnia and Herzegovina | M4.8 | 83 km | 19 km |
| Aug 30, 2019 | 6 km NNW of Mramor, Bosnia and Herzegovina | M4.8 | 84 km | 7 km |
| Aug 2, 2003 | 5 km SE of Metkovi?, Croatia | M4.7 | 110 km | 10 km |
| May 22, 1994 | 14 km NNW of Orebi?, Croatia | M4.7 | 124 km | 29 km |
| Jun 7, 1992 | 11 km S of Sokolac, Bosnia and Herzegovina | M4.7 | 63 km | 11 km |
Source: USGS Earthquake Catalog (M2.5+, 1990–2025). Sorted by magnitude.
Tsunami History
1 tsunami recorded within 500 km. Highest wave on record: 0.0 m (0 ft).
| Year | Location | Cause | Max Wave | Deaths | Distance |
| 1962 | DALMATIAN COASTS | Earthquake | 0.0 m | 1 | 107 km |
Source: NOAA/NCEI Historical Tsunami Database.
Monthly Weather
| Month | Avg Temperature | Precipitation | Summary |
|---|---|---|---|
| January | 31°F (-0°C) | 2.8 in | Coldest |
| February | 34°F (1°C) | 2.8 in | Driest |
| March | 41°F (5°C) | 2.8 in | |
| April | 48°F (9°C) | 3.3 in | |
| May | 57°F (14°C) | 3.4 in | |
| June | 63°F (17°C) | 3.6 in | |
| July | 66°F (19°C) | 3.0 in | Warmest |
| August | 65°F (19°C) | 2.9 in | |
| September | 59°F (15°C) | 3.3 in | |
| October | 51°F (10°C) | 3.8 in | |
| November | 40°F (5°C) | 4.6 in | Wettest |
| December | 33°F (0°C) | 3.9 in |
Gromiljak has a seasonal temperature swing of 35°F / from 31°F in January to 66°F in July. Total annual precipitation is 40.0 inches, with November being the wettest month (4.6") and February the driest (2.8").